A new single-cone vacuum dryer
By introducing a spiral plate and spiral cone tube structure into a single cone vacuum dryer, combined with a vacuum environment and a geared motor drive, the problem of uneven heat conduction is solved, achieving uniform heating and efficient drying of materials.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUBEI HENGFENG MEDICAL PHARMA EQUIP CO LTD
- Filing Date
- 2025-07-02
- Publication Date
- 2026-07-07
AI Technical Summary
Existing single-cone vacuum dryers have difficulty conducting heat evenly during the heat transfer process, resulting in low material drying efficiency.
It adopts a spiral plate and spiral cone tube structure, combined with a vacuum environment and geared motor drive, to transfer heat through the spiral plate and spiral cone tube, and to improve heat uniformity and drying efficiency by stirring the material.
It achieves uniform heating and rapid drying of materials, improves drying efficiency, and protects heat-sensitive materials from damage by high temperatures.
Smart Images
Figure CN224470656U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of drying technology, specifically a novel single-cone vacuum dryer. Background Technology
[0002] Vacuum dryers are widely used in the pharmaceutical, chemical, and food industries. They lower the boiling point of solvents in materials through a negative pressure environment, achieving low-temperature and efficient drying. They are particularly suitable for processing heat-sensitive, easily oxidized, or high-value-added materials. Traditional single-cone vacuum dryers employ a conical tank design, combining jacket heating with internal stirring to ensure uniform heating and thorough mixing of materials under vacuum conditions. They also function as dryers, mixers, and unloaders.
[0003] In practical use, existing single-cone vacuum dryers utilize a heat transfer medium, such as hot water or hot oil, which is then fed into the jacket. The heat from the medium is transferred through the jacket to the inner wall of the chamber, and subsequently to the material, causing the moisture in the material to evaporate rapidly into water vapor. However, this heat transfer method is difficult to distribute evenly to the material, thus reducing the drying efficiency. Utility Model Content
[0004] (a) Technical problems to be solved
[0005] In view of the shortcomings of the existing technology, this utility model provides a novel single cone vacuum dryer, which has the advantages of rapidly improving the drying efficiency of materials and solves the above-mentioned technical problems.
[0006] (II) Technical Solution
[0007] To achieve the above objectives, this utility model provides the following technical solution: A novel single-cone vacuum dryer includes a conical tank. The top of the conical tank is bolted to a top cover. A gantry frame is fixedly connected to the top surface of the top cover, and a hollow rotating rod is rotatably connected inside the top cover. A rotary joint one is rotatably connected to the top of the hollow rotating rod. A heat medium inlet pipe is rotatably connected to the top of the rotary joint one. A rotary joint two is rotatably connected to the bottom of the hollow rotating rod. A bent pipe is rotatably connected to the bottom of the rotary joint two. A spiral conical tube is fixedly connected to one end of the bent pipe. A heat medium outlet pipe is fixedly connected to one end of the spiral conical tube. Several pipe heads are welded to the outer axial surface of the hollow rotating rod. A connecting pipe is threaded inside each pipe head. A spiral plate is fixedly connected to one end of the connecting pipe.
[0008] Preferably, a material inlet pipe is fixedly connected to the top surface of the top cover, a discharge valve is connected to the bottom end of the conical tank via a flange, a vacuum pump is installed on the top of the gantry, a vacuum pipe is connected to the air inlet of the vacuum pump, one end of the vacuum pipe is connected to the top of the top cover, and a vacuum valve is connected to the middle section of the vacuum pipe.
[0009] Preferably, four angle steel supports are welded to the outer wall of the conical tank around its axial direction, and a geared motor is installed on the top of the gantry frame.
[0010] Preferably, the output shaft of the geared motor is connected to a drive gear, and a driven gear is fixedly connected to the outer shaft surface of the hollow rotating rod near the top end, and the drive gear and the driven gear are meshed together.
[0011] Preferably, the hollow rotating rod and the connecting pipe are interconnected, the spiral plate is hollow inside, and the spiral plate and the connecting pipe are interconnected.
[0012] Preferably, the spiral conical tube is welded to the inner wall of the conical tank, and one end of the heat medium discharge pipe is welded to the outer wall of the conical tank.
[0013] Compared with the prior art, this utility model provides a novel single-cone vacuum dryer, which has the following beneficial effects:
[0014] This invention allows the heat medium to flow through the spiral plate and spiral cone tube after being introduced through the heat medium inlet pipe, transferring heat to the material from different positions and avoiding uneven heating of the material. The geared motor drives the hollow rotating rod and spiral plate to rotate, continuously stirring the material during the rotation process, so that all parts of the material can fully contact the heat, further promoting the uniformity of drying and improving the drying efficiency. Attached Figure Description
[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present utility model;
[0016] Figure 2 This is a three-dimensional cross-sectional view of the structure of this utility model;
[0017] Figure 3 This is a three-dimensional schematic diagram of the interior of the conical tank in the structure of this utility model;
[0018] Figure 4 The structure of this utility model Figure 3 A magnified view of part A in the diagram.
[0019] The components include: 1. Conical tank body; 2. Top cover; 3. Gantry frame; 4. Hollow rotating rod; 5. Adapter one; 6. Heat medium inlet pipe; 7. Rotary joint two; 8. Bend; 9. Spiral conical pipe; 10. Heat medium outlet pipe; 11. Pipe head; 12. Connecting pipe; 13. Spiral plate; 14. Material inlet pipe; 15. Discharge valve; 16. Angle steel support; 17. Drive gear; 18. Driven gear; 19. Vacuum pump; 20. Vacuum pipeline; 21. Vacuum valve; 22. Gear motor. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.
[0021] Please see Figures 1-4 A novel single-cone vacuum dryer includes a conical tank 1. A top cover 2 is bolted to the top of the conical tank 1. A gantry frame 3 is fixedly connected to the top surface of the top cover 2. A hollow rotating rod 4 is rotatably connected inside the top cover 2. A rotary joint 5 is rotatably connected to the top of the hollow rotating rod 4. A heat medium inlet pipe 6 is rotatably connected to the top of the rotary joint 5. A rotary joint 7 is rotatably connected to the bottom of the hollow rotating rod 4. A bent pipe 8 is rotatably connected to the bottom of the rotary joint 7. A spiral conical pipe 9 is fixedly connected to one end of the bent pipe 8. A heat medium outlet pipe 10 is fixedly connected to one end of the spiral conical pipe 9. Several pipe heads 11 are welded to the outer shaft surface of the hollow rotating rod 4. A connecting pipe 12 is threaded inside the pipe head 11. A spiral plate 13 is fixedly connected to one end of the connecting pipe 12.
[0022] Specifically, a material inlet pipe 14 is fixedly connected to the top surface of the top cover 2, a discharge valve 15 is connected to the bottom end of the conical tank 1 via a flange, a vacuum pump 19 is installed on the top of the gantry 3, a vacuum pipe 20 is connected to the air inlet of the vacuum pump 19, one end of the vacuum pipe 20 is connected to the top of the top cover 2, and a vacuum valve 21 is connected to the middle section of the vacuum pipe 20.
[0023] The advantages are that the material inlet pipe 14 can be connected to the material conveying equipment to transport the material to be dried into the conical tank 1, which is the channel for the material to enter the dryer; the discharge valve 15 is located at the bottom of the conical tank 1. After the material is dried, the dried material can be discharged by opening the discharge valve 15 to realize the unloading function; the vacuum pump 19 is installed on the top of the gantry 3 and connected to the top of the top cover 2 through the vacuum pipe 20. Its function is to extract the air in the conical tank 1 to create a negative pressure environment in the tank, reduce the boiling point of the solvent in the material, and thus achieve low-temperature and high-efficiency drying.
[0024] Specifically, four angle steel supports 16 are welded around the axis of the outer wall of the conical tank 1, and a geared motor 22 is installed on the top of the gantry 3.
[0025] Specifically, the output shaft of the geared motor 22 is connected to a drive gear 17, and a driven gear 18 is fixedly connected to the outer shaft surface of the hollow rotating rod 4 near the top. The drive gear 17 and the driven gear 18 are meshed together.
[0026] The advantage is that the angle steel supports 16 are welded to the outer wall of the conical tank 1, and four are arranged around its axis. They are mainly used to connect and support the equipment to fix the conical tank 1, making the equipment more stable during operation. When the reduction motor 22 starts, the drive gear 17 rotates, which drives the driven gear 18 to rotate, thereby causing the hollow rotating rod 4 to rotate. The rotation of the hollow rotating rod 4 can drive the spiral plate 13 connected to it to rotate, thereby stirring the material in the conical tank 1 and promoting more uniform heating of the material. At the same time, the multiple spiral plates 13 are in a spiral upward state, which can continuously stir the material and lift the material to a certain extent, thereby further promoting the uniformity of material drying.
[0027] Specifically, the hollow rotating rod 4 is interconnected with the connecting pipe 12, the spiral plate 13 is hollow inside, and the spiral plate 13 is interconnected with the connecting pipe 12.
[0028] Specifically, the spiral conical pipe 9 is welded to the inner wall of the conical tank 1, and one end of the heat medium discharge pipe 10 is welded to the outer wall of the conical tank 1.
[0029] The advantage is that steam is introduced through the heat medium inlet pipe 6 as the heat medium. The high-temperature steam enters the hollow rotating rod 4 through the rotary joint 5. Since the hollow rotating rod 4 is interconnected with the connecting pipe 12, and the connecting pipe 12 is connected to the internal hollow spiral plate 13, the steam can flow into the spiral plate 13. During the rotation of the spiral plate 13, the heat it carries is directly transferred to the surrounding material, accelerating the evaporation of moisture in the material. At the same time, the steam in the hollow rotating rod 4 also enters the spiral cone tube 9 welded to the inner wall of the conical tank 1 through the rotary joint 7 and the bend pipe 8. The heat is transferred from the spiral cone tube 9 to the material. Finally, the cooled gas is discharged from the heat medium outlet pipe 10. Through the above design, the spiral plate The dual heating structure of the spiral plate 13 and the spiral conical tube 9 significantly increases the contact area between the heat medium and the material. During rotation, the spiral plate 13 continuously transfers heat to the surrounding material, and its rotational stirring action makes the material heated more evenly, avoiding local underheating or overheating, and accelerating the evaporation of moisture in the material from all directions. On the other hand, the spiral conical tube 9 is close to the inner wall of the conical tank, which can make full use of the tank space and directly transfer heat to all parts of the material, reducing the heat transfer path and loss. In addition, the entire heating structure, combined with the vacuum environment, can make the moisture in the material boil and evaporate quickly at a lower temperature, which not only improves the drying efficiency, but also better protects the heat-sensitive material from being damaged by high temperature.
[0030] In operation, first, close the discharge valve 15, open the vacuum valve 21, and start the vacuum pump 19. Air is extracted from the conical tank 1 through the vacuum pipe 20 to achieve the required vacuum level. The material to be dried is then transported into the conical tank 1 through the material inlet pipe 14. A heat medium (such as steam) is introduced through the heat medium inlet pipe 6. The heat medium enters the hollow rotating rod 4 through the rotary joint 5, then flows into the connecting pipe 12 and the spiral plate 13, and finally enters the spiral conical tube 9 through the rotary joint 7 and the bend pipe 8, providing heat to the material. Then, the reduction motor 22 is started, and its output shaft drives the drive gear 17 to rotate. The drive gear 17 meshes with the driven gear 18, causing the hollow rotating rod 4 to rotate, which in turn drives the spiral plate 13 to rotate, stirring the material and ensuring more uniform heating, thus accelerating drying. During the drying process, the generated water vapor is extracted by the vacuum pump 19. The cooled heat medium is discharged from the heat medium discharge pipe 10; after the material is dried, the vacuum pump 19 and vacuum valve 21 are turned off, and the discharge valve 15 is opened to discharge the dried material from the bottom of the conical tank 1.
[0031] 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 novel single-cone vacuum dryer, comprising a conical tank (1), characterized in that: The top of the conical tank (1) is bolted to a top cover (2). A gantry frame (3) is fixedly connected to the top surface of the top cover (2). A hollow rotating rod (4) is rotatably connected inside the top cover (2). A rotating joint (5) is rotatably connected to the top of the hollow rotating rod (4). A heat medium inlet pipe (6) is rotatably connected to the top of the rotating joint (5). A rotating joint (7) is rotatably connected to the bottom of the hollow rotating rod (4). A bent pipe (8) is rotatably connected to the bottom of the rotating joint (7). A spiral conical pipe (9) is fixedly connected to one end of the bent pipe (8). A heat medium outlet pipe (10) is fixedly connected to one end of the spiral conical pipe (9). Several pipe heads (11) are welded to the outer shaft surface of the hollow rotating rod (4). A connecting pipe (12) is threaded inside the pipe head (11). A spiral plate (13) is fixedly connected to one end of the connecting pipe (12).
2. The novel single-cone vacuum dryer according to claim 1, characterized in that: The top surface of the top cover (2) is fixedly connected to a material inlet pipe (14), the bottom end of the conical tank (1) is connected to a discharge valve (15) via a flange, the top of the gantry (3) is equipped with a vacuum pump (19), the air inlet of the vacuum pump (19) is connected to a vacuum pipe (20), one end of the vacuum pipe (20) is connected to the top of the top cover (2), and the middle section of the vacuum pipe (20) is connected to a vacuum valve (21).
3. The novel single-cone vacuum dryer according to claim 1, characterized in that: Four angle steel supports (16) are welded around the outer wall of the conical tank (1) in the direction of its axis, and a geared motor (22) is installed on the top of the gantry (3).
4. A novel single-cone vacuum dryer according to claim 3, characterized in that: The output shaft of the geared motor (22) is connected to a drive gear (17), and a driven gear (18) is fixedly connected to the outer shaft surface of the hollow rotating rod (4) near the top. The drive gear (17) and the driven gear (18) are meshed together.
5. A novel single-cone vacuum dryer according to claim 1, characterized in that: The hollow rotating rod (4) is connected to the connecting pipe (12), the spiral plate (13) is hollow inside, and the spiral plate (13) is connected to the connecting pipe (12).
6. A novel single-cone vacuum dryer according to claim 1, characterized in that: The spiral conical tube (9) is welded to the inner wall of the conical tank (1), and one end of the heat medium discharge pipe (10) is welded to the outer wall of the conical tank (1).