Vacuum drying tank

Abstract

The utility model relates to drying technical field discloses a vacuum drying jar, including outer jacket, the dry inner jar is fixed with the center of circle in the inside of outer jacket, the open end of dry inner jar top is equipped with the end cover with the feed inlet, the center of circle of end cover top is fixed with servo motor, and the output of servo motor is fixed with heat insulation vertical shaft, and a group of stirring leaves are welded on heat insulation vertical shaft and present equidistance. The vacuum drying jar, through the setting of the heat equalizing component, the heat of the heat source area is actively introduced and diffused to the heat conduction jar body inside space, and the heat radiation block, the plate greatly increase the effective contact heat exchange area with the material, and the heat is directly and efficiently transmitted to the material, and the heat transfer efficiency is greatly improved, and the drying time is shortened, thereby helping to reduce energy consumption, and realizing uniform drying, and constantly turning up and down to the material, and the material can alternately and repeatedly contact the surface of the high temperature heat radiation plate and other areas in the jar, and the heat is evenly distributed in the material group.

Description

Technical Field

[0001] This utility model relates to the field of drying technology, and in particular to a vacuum drying tank. Background Technology

[0002] Vacuum drying technology is widely used in the processing of heat-sensitive, easily oxidized, or low-temperature, high-efficiency materials. Traditional vacuum drying tanks reduce the pressure inside the tank by creating a vacuum, thereby lowering the boiling point of the material and allowing moisture to evaporate at a lower temperature.

[0003] In a vacuum environment, the air inside the tank is thin, which severely weakens the efficient heat transfer method of convection. The transfer of heat to the material mainly relies on heat conduction. For the central area of ​​the tank and materials that are not in direct contact with the tank wall, the heat transfer path is long, the resistance is high, and the efficiency is very low. Because effective heat conduction only occurs at the contact surface between the material and the tank wall, the overall heat exchange area is limited, the material heats up slowly, the moisture evaporation rate is low, the drying cycle is significantly prolonged, the heat transfer efficiency is low, and the drying speed is slow. At the same time, the material near the tank wall is overheated, while the material in the center of the tank is underheated, resulting in high residual moisture content, uneven drying, and affecting the quality of the final product. Utility Model Content

[0004] In view of the aforementioned problem that the efficient heat transfer method of convection heat transfer is severely weakened in a vacuum environment, resulting in very low drying efficiency, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide a vacuum drying tank, which aims to significantly improve heat transfer efficiency, shorten drying time, reduce energy consumption, and achieve uniform drying.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a vacuum drying tank, including an outer jacket, an inner drying tank fixed at the center of the outer jacket, a water bath cavity formed between the inner wall of the outer jacket and the outer wall of the inner drying tank, an end cap with a feed inlet provided at the open end of the top of the inner drying tank, a servo motor fixed at the center of the top of the end cap, a heat-insulating vertical shaft fixed at the output end of the servo motor, and a set of stirring blades welded at equal intervals on the heat-insulating vertical shaft; The drying inner tank includes a heat-conducting tank body with an arc-shaped bottom. A heat-insulating drain pipe is welded to the drain outlet at the bottom of the heat-conducting tank body. A heat-insulating chamber is welded to the end of the heat-conducting tank body away from the heat-insulating drain pipe. A negative pressure connecting pipe is welded to the outer edge of the heat-insulating chamber at the position opposite the vent.

[0007] As an improved technical solution, the outer wall surface of the heat-insulating vertical shaft is welded with a threaded ribbon, and a lifting channel is formed between the threaded ribbon and the inner wall surface of the drying inner tank.

[0008] As an improved technical solution, the outer wall surface of the heat-insulating vertical shaft is welded with several welding frames, and the end of the welding frame away from the heat-insulating vertical shaft is welded to the threaded strip.

[0009] As an improved technical solution, the outer wall surface of the heat-insulating vertical shaft is welded with several heat-equalizing components at longitudinal intervals, and the two adjacent heat-equalizing components are staggered to the left and right, with each heat-equalizing component located in the spacer cavity of the spiral ribbon.

[0010] As an improved technical solution, the heat dissipation assembly includes a heat dissipation horizontal plate welded to a heat insulation vertical shaft. An arc-shaped heat-conducting block is welded to the outer end of the heat dissipation horizontal plate, and the outer curvature of the arc-shaped heat-conducting block is adapted to the curvature of the heat-conducting tank. A shaft hole through which the heat insulation vertical shaft passes is opened at the end of the heat dissipation horizontal plate away from the arc-shaped heat-conducting block.

[0011] As an improved technical solution, a row of diamond-shaped heat dissipation blocks are welded to the top and bottom of the heat dissipation plate, and a triangular heat dissipation block is welded to the top of the heat dissipation plate between two adjacent diamond-shaped heat dissipation blocks, and a flow channel is formed between the diamond-shaped heat dissipation blocks and the triangular heat dissipation blocks.

[0012] After adopting the above technical solution, the beneficial effects of this utility model are: 1. This utility model uses a servo motor to drive the heat-insulating vertical shaft to rotate. The stirring blades continuously agitate the material, causing it to tumble inside the drying tank. This promotes uniform heating of the material. The screw ribbon also rotates with the heat-insulating vertical shaft. As the shaft rotates, it lifts the material, enabling continuous vertical convection circulation of the material inside the drying tank. This expands the tumbling space of the material and further promotes uniform heating.

[0013] 2. In this utility model, the arc-shaped heat-conducting block absorbs heat from the heat-conducting tank and transfers it towards the heat dissipation plate. Previously, heating relied solely on the heat-conducting tank; now, both the heat dissipation plate and the arc-shaped heat-conducting block serve as heating sources, expanding the heat source's dispersion range within the heat-conducting tank. This facilitates more comprehensive and uniform heating of the material. Furthermore, the flow channel formed between the diamond-shaped and triangular heat dissipation blocks increases the heating area between the material and the heat source, further improving the heating effect. Simultaneously, the heat-spreading assembly is in a rotating state within the heat-conducting tank, ensuring comprehensive absorption and dispersion of heat within the tank.

[0014] 3. This utility model, through the setting of the heat equalization component, actively introduces and diffuses the heat near the heat source area into the internal space of the heat-conducting tank. The heat dissipation blocks and plates greatly increase the effective contact heat exchange area with the material, directly and efficiently transferring heat to the material, significantly improving heat transfer efficiency, shortening drying time, thereby helping to reduce energy consumption and achieve uniform drying. At the same time, the continuous up-and-down turning and stirring of the material allows the material to alternately and repeatedly contact the high-temperature heat dissipation plate surface and other areas inside the tank, achieving uniform distribution of heat in the material group and improving uniformity. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a three-dimensional structural diagram of a vacuum drying tank according to the present invention.

[0016] Figure 2 This is a cross-sectional structural diagram of the inner drying tank of a vacuum drying tank according to the present invention.

[0017] Figure 3 This is a schematic diagram of the heat equalization component of a vacuum drying tank according to the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. Outer jacket; 2. Drying inner tank; 21. Heat-conducting tank body; 22. Insulated drain pipe; 23. Insulated chamber; 3. Water bath; 4. Negative pressure connecting pipe; 5. Welding frame; 6. End cap; 7. Servo motor; 8. Heat dissipation assembly; 81. Heat dissipation horizontal plate; 82. Rhomboid heat dissipation block; 83. Flow channel; 84. Shaft hole; 85. Triangular heat dissipation block; 86. Arc-shaped heat-conducting block; 9. Stirring blade; 10. Spiral ribbon; 11. Insulated vertical shaft. Detailed Implementation

[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Example 1

[0020] Reference Figures 1-3This is the first embodiment of the present invention, which provides a vacuum drying tank. This vacuum drying tank includes an outer jacket 1 and a support leg welded to the bottom of the outer jacket 1. A drying inner tank 2 is fixed at the center of the outer jacket 1, and the top of the drying inner tank 2 is located above the outer jacket 1. A liquid injection pipe and a drain pipe are provided on the drying inner tank 2. A water bath 3 is formed between the inner wall of the outer jacket 1 and the outer wall of the drying inner tank 2. An end cap 6 with a feed inlet is provided at the open end of the top of the drying inner tank 2. A servo motor 7 is fixed at the center of the top of the end cap 6, and the output end of the servo motor 7 is located inside the end cap 6. A heat-insulating vertical shaft 11 is fixed at the output end of the servo motor 7, and a set of stirring blades 9 are welded at equal intervals on the heat-insulating vertical shaft 11. The drying inner tank 2 includes a heat-conducting tank body 21 with an arc-shaped bottom. The design of the heat-conducting tank body 21 is more conducive to the absorption of heat in the water bath chamber 3, increasing the heating efficiency of the heat-conducting tank body 21. A heat-insulating drain pipe 22 is welded to the drain outlet at the bottom of the heat-conducting tank body 21. A heat-insulating chamber 23 is welded to the end of the heat-conducting tank body 21 away from the heat-insulating drain pipe 22. A negative pressure connecting pipe 4 is welded to the outer edge of the heat-insulating chamber 23 and at the position opposite to the vent. The heat-insulating drain pipe 22 and the heat-insulating chamber 23 are used to prevent the ineffective diffusion of heat.

[0021] A screw ribbon 10 is welded to the outer wall of the heat-insulating vertical shaft 11, and a lifting channel is formed between the screw ribbon 10 and the inner wall of the drying inner tank 2. The screw ribbon 10 will also rotate with the heat-insulating vertical shaft 11. When the screw ribbon 10 rotates, it will align with the material and lift it, so as to realize the continuous vertical convection circulation of the material inside the drying inner tank 2, expand the turning space of the material, and further promote the uniformity of material heating.

[0022] Several welding frames 5 are welded to the outer wall surface of the heat-insulating vertical shaft 11, and the end of the welding frame 5 away from the heat-insulating vertical shaft 11 is welded to the threaded ribbon 10.

[0023] During use, the heat distribution component 8 actively guides and diffuses heat from the area near the heat source into the interior space of the heat-conducting tank 21. The heat dissipation blocks and plates greatly increase the effective contact area for heat exchange with the material, directly and efficiently transferring heat to the material, significantly improving heat transfer efficiency and shortening drying time, thereby helping to reduce energy consumption and achieve uniform drying. At the same time, the material is constantly turned up and down and stirred, allowing it to alternately and repeatedly contact the high-temperature heat dissipation plate surface and other areas inside the tank, achieving uniform distribution of heat in the material group and improving uniformity. Example 2

[0024] Reference Figure 1 and Figure 3This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that: a number of heat-spreading components 8 are welded longitudinally on the outer wall surface of the heat-insulating vertical shaft 11, and two adjacent heat-spreading components 8 are staggered to the left and right. Each heat-spreading component 8 is located in the spacer cavity of the screw ribbon 10.

[0025] The heat dissipation assembly 8 includes a heat dissipation horizontal plate 81 welded to the heat insulation vertical shaft 11. An arc-shaped heat-conducting block 86 is welded to the outer end of the heat dissipation horizontal plate 81, and the outer curvature of the arc-shaped heat-conducting block 86 is adapted to the inner curvature of the heat-conducting tank 21. A shaft hole 84 through which the heat insulation vertical shaft 11 passes is opened at the end of the heat dissipation horizontal plate 81 away from the arc-shaped heat-conducting block 86.

[0026] A row of diamond-shaped heat dissipation blocks 82 is welded to the top and bottom of the heat dissipation plate 81. A triangular heat dissipation block 85 is welded to the top of the heat dissipation plate 81 between two adjacent diamond-shaped heat dissipation blocks 82. A flow channel 83 is formed between the diamond-shaped heat dissipation blocks 82 and the triangular heat dissipation blocks 85. The flow channel 83 formed between the diamond-shaped heat dissipation blocks 82 and the triangular heat dissipation blocks 85 will increase the heat-receiving area between the material and the heat source, further improving the heating effect. At the same time, the heat distribution component 8 is in a rotating state, so that the heat distribution component 8 is in a rotating state inside the heat conduction tank 21, which fully absorbs the heat of the heat conduction tank 21 and distributes it fully inside the heat conduction tank 21.

[0027] During use, the arc-shaped heat-conducting block 86 absorbs the heat on the heat-conducting can 21 and transfers the heat to the heat dissipation plate 81. The heating is changed from relying solely on the heat-conducting can 21 to using both the heat dissipation plate 81 and the arc-shaped heat-conducting block 86 as heating sources, expanding the range of heat source dispersion inside the heat-conducting can 21, which is beneficial for the comprehensiveness and uniformity of material heating.

[0028] The remaining structure is the same as that in Example 1.

[0029] Based on embodiments 1-2, the working principle of this utility model is as follows: After the material is introduced into the drying inner tank 2, the vacuum pump is connected to the negative pressure connecting pipe 4. The vacuum pump is used to evacuate the inside of the drying inner tank 2. The liquid heat source is injected into the water bath chamber 3 to heat and dry the drying inner tank 2 and the material inside the drying inner tank 2. At the same time, the servo motor 7 drives the heat-insulating vertical shaft 11 to rotate. The stirring blades 9 continuously stir the material, causing the material inside the drying inner tank 2 to be in a state of tumbling, which helps to promote the uniformity of the material heating. The screw ribbon 10 will also rotate along with the heat insulation vertical shaft 11. When the screw ribbon 10 rotates, it will align with the material and lift it up, so that the material inside the drying inner tank 2 can continuously circulate up and down, expand the turning space of the material, and further promote the uniformity of material heating. The arc-shaped heat-conducting block 86 absorbs the heat on the heat-conducting can 21 and transfers the heat to the heat dissipation plate 81. Previously, the heat was only heated by the heat-conducting can 21, but now both the heat dissipation plate 81 and the arc-shaped heat-conducting block 86 are heat sources, expanding the range of heat source dispersion inside the heat-conducting can 21.

[0030] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A vacuum drying jar, comprising an outer jacket (1), characterized in that: A drying inner tank (2) is fixed at the center of the outer jacket (1). A water bath cavity (3) is formed between the inner wall of the outer jacket (1) and the outer wall of the drying inner tank (2). An end cap (6) with a feed inlet is provided at the open end of the top of the drying inner tank (2). A servo motor (7) is fixed at the center of the top of the end cap (6). A heat-insulating vertical shaft (11) is fixed at the output end of the servo motor (7). A set of stirring blades (9) are welded at equal intervals on the heat-insulating vertical shaft (11). The drying inner tank (2) includes a heat-conducting tank body (21) with an arc-shaped bottom. A heat-insulating drain pipe (22) is welded to the drain outlet at the bottom of the heat-conducting tank body (21). A heat-insulating chamber (23) is welded to the end of the heat-conducting tank body (21) away from the heat-insulating drain pipe (22). A negative pressure connecting pipe (4) is welded to the outer edge of the heat-insulating chamber (23) at the position opposite to the vent.

2. The vacuum drying jar according to claim 1, characterized in that: The outer wall of the heat-insulating vertical shaft (11) is welded with a threaded ribbon (10), and a lifting channel is formed between the threaded ribbon (10) and the inner wall of the drying inner tank (2).

3. A vacuum drying jar according to claim 2, characterized in that: The outer wall of the heat-insulating vertical shaft (11) is welded with several welding frames (5), and the end of the welding frame (5) away from the heat-insulating vertical shaft (11) is welded to the threaded strip (10).

4. A vacuum drying jar according to claim 3, characterized in that: The outer wall of the heat-insulating vertical shaft (11) is welded with a number of heat-spreading components (8) at longitudinal intervals, and the two adjacent heat-spreading components (8) are staggered to the left and right. Each heat-spreading component (8) is located in the spacer cavity of the screw ribbon (10).

5. A vacuum drying jar according to claim 4, characterized in that: The heat dissipation assembly (8) includes a heat dissipation horizontal plate (81) welded on the heat insulation vertical shaft (11). An arc-shaped heat-conducting block (86) is welded to the outer end of the heat dissipation horizontal plate (81), and the outer curvature of the arc-shaped heat-conducting block (86) is adapted to the inner curvature of the heat-conducting tank (21). A shaft hole (84) through which the heat insulation vertical shaft (11) passes is opened at the end of the heat dissipation horizontal plate (81) away from the arc-shaped heat-conducting block (86).

6. A vacuum drying jar according to claim 5, characterized in that: A row of diamond-shaped heat dissipation blocks (82) is welded to the top and bottom of the heat dissipation plate (81). A triangular heat dissipation block (85) is welded to the top of the heat dissipation plate (81) and between two adjacent diamond-shaped heat dissipation blocks (82). A flow channel (83) is formed between the diamond-shaped heat dissipation blocks (82) and the triangular heat dissipation blocks (85).

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