Single-cone vacuum dryer

Abstract

The invention provides a single-cone vacuum dryer, and relates to the field of dryers. The device comprises a cone tank, the cone tank is provided with a stirring assembly, the stirring assembly comprises a revolution arm, a connecting arm, a rotation arm, a stirring roller, a first motor and a second motor, the first motor is installed on the cone tank, an output shaft of the first motor is coaxially fixed to the revolution arm, and the revolution arm is connected with the connection arm; one end of the connecting arm is fixed with the revolution arm, the other end of the connecting arm is fixed with the second motor, and the stirring roller is coaxially fixed with an output shaft of the second motor through the rotation arm. The stirring device has the effect of high stirring efficiency.

Description

Technical Field

[0001] The present application relates to the field of dryers, and particularly to a single-cone vacuum dryer. Background Art

[0002] The single-cone vacuum dryer is an efficient and multifunctional drying device, mainly used for drying powders in industries such as pharmaceuticals, chemicals, pesticides, and food.

[0003] Currently, in the related art, the Chinese patent with the authorization announcement number CN216814891U discloses a new single-cone dryer, which includes a conical container, a cover, a feed hopper, an air outlet pipe, and a bracket. The conical container is fixedly installed on the bracket, the cover is connected to the top of the conical container, the feed hopper and the air outlet pipe are communicated with the cover, the cover is also communicated with an air inlet pipe, the input end of the air inlet pipe is communicated with the output end of an air heater, a motor is fixedly installed on the top of the cover, the output end of the motor is connected to a speed reducer, the output end of the speed reducer is connected to a rotating shaft, a rotating grinding disc is fixedly installed on the rotating shaft, a fixed grinding disc matching the rotating grinding disc is fixedly installed in the conical container, and a discharge port is arranged at the bottom end of the conical container. This application can grind the material while drying it to prevent agglomeration.

[0004] However, only using the blades on a single rotating shaft to stir the material has low stirring efficiency and poor stirring effect on the material. Summary of the Invention

[0005] In order to improve the problems existing in the above technology, the present application provides a single-cone vacuum dryer.

[0006] The present application provides a single-cone vacuum dryer, adopting the following technical solution: A single-cone vacuum dryer includes: a conical tank, a stirring assembly is arranged on the conical tank, the stirring assembly includes: a revolving arm, a connecting arm, a rotating arm, a stirring roller, a first motor, and a second motor. The first motor is installed on the conical tank, and the output shaft of the first motor is coaxially fixed with the revolving arm. One end of the connecting arm is fixed to the revolving arm, and the other end is fixed to the second motor. The stirring roller is coaxially fixed to the output shaft of the second motor through the rotating arm.

[0007] By adopting the above technical solution, start the first motor to drive the revolving arm to drive the stirring roller to rotate in the conical tank, thereby stirring the material; at the same time, start the second motor to drive the stirring roller to rotate itself, thereby further stirring the material to improve the stirring efficiency and effect; and the cooperation of revolution and rotation can make the material heat more evenly, so that the liquid phase in the material overflows faster.

[0008] Optionally, a drying assembly is provided on the conical tank. The drying assembly includes: a vacuum pump, a charging pipe, and an air heater. The vacuum pump and the air heater are both provided on the conical tank. One end of the charging pipe communicates with the air heater, and the other end communicates with the conical tank.

[0009] By adopting the above technical solution, the material is conveyed into the conical tank; then, the air heater is started, and hot air is sent into the conical tank through the charging pipe to dry the material; at the same time, the vacuum pump is started to extract the air and water vapor in the conical tank. On the one hand, the purpose of solid-liquid separation is achieved, and on the other hand, the vacuum degree in the conical tank is increased, thereby improving the drying effect.

[0010] Optionally, the drying assembly further includes: a filter, which is connected in series between the vacuum pump and the conical tank.

[0011] By adopting the above technical solution, the filter is used to filter the dust in the extracted gas to prevent damage to the vacuum pump.

[0012] Optionally, a gas expansion assembly is provided between the stirring roller and the charging pipe. The gas expansion assembly includes: a gas distribution part, a gas connection part, a transition part, and a gas expansion part. The gas expansion part is provided on the stirring roller, the transition part is provided on the gas expansion part, the gas connection part is provided between the charging pipe and the transition part, and the gas distribution part is provided between the gas connection part and the conical tank.

[0013] By adopting the above technical solution, the gas expansion assembly can, on the one hand, convey hot air into the conical tank, and on the other hand, the hot air can enter the stirring roller; during the rotation and revolution of the stirring roller, the stirring roller can output the hot air into the conical tank, so that the material can contact the hot air more evenly, thereby improving the drying efficiency.

[0014] Optionally, the gas connection part includes: a connecting pipe and a gas connection ring plate. A gas connection cavity is formed on the conical tank, and a gas connection groove is formed through the inner wall of the gas connection cavity. The charging pipe communicates with the gas connection cavity. The gas connection ring plate is arranged in the gas connection cavity. One end of the connecting pipe is connected to the transition part, and the other end passes through the gas connection groove and is fixed to the gas connection ring plate, and the connecting pipe penetrates through the gas connection ring plate. The gas distribution part is arranged between the gas connection cavity and the conical tank.

[0015] By adopting the above technical solution, during drying, the charging pipe conveys hot air into the gas connection cavity, and then the connecting pipe conveys it into the transition part for transition.

[0016] Optionally, the transition part includes: an outer ring plate, a connecting rod, and a connecting ball. The connecting ball is arranged on the air expansion part. One end of the connecting rod is connected to the connecting ball, and the other end is fixed to the outer ring plate. A transition cavity is formed in the outer ring plate, and the connecting air pipe communicates with the transition cavity. By adopting the above technical solution, with the cooperation of the connecting rod and the connecting ball, the stirring roller can drive the connecting air pipe to move, and the stirring roller itself can also rotate. Therefore, the revolution and rotation of the stirring roller are not easily affected during the air delivery process.

[0017] Optionally, the air expansion part includes: an inner ring plate, an air expansion pipe, and an air expansion ring plate. The inner ring plate is coaxially sleeved on the stirring roller, and a ring groove is formed in the inner ring plate. The connecting ball is arranged in the ring groove. An air inlet cavity is formed in the inner ring plate, and air inlet holes are formed through the inner wall of the air inlet cavity. An air outlet cavity is formed in the stirring roller, and air vent holes communicating with the air inlet holes are formed through the inner wall of the air outlet cavity. A relief groove is formed through the inner wall of the air inlet cavity. The air expansion ring plate is arranged in the air inlet cavity. One end of the air expansion pipe communicates with the transition cavity, and the other end passes through the relief groove and is fixed to the air expansion ring plate, and the air expansion pipe penetrates through the air expansion ring plate.

[0018] By adopting the above technical solution, when the stirring roller rotates and revolves, the hot air in the air inlet cavity enters the air outlet cavity through the air inlet holes and the air vent holes, and finally enters the conical tank through the air outlet holes, thereby drying the materials.

[0019] Optionally, the air distribution part includes: an air distribution pipe. A air distribution cavity is formed in the conical tank, and air distribution holes are formed through the inner wall of the air distribution cavity. One end of the air distribution pipe communicates with the connecting air cavity, and the other end communicates with the air distribution cavity.

[0020] By adopting the above technical solution, after the hot air is transported to the connecting air cavity by the air charging pipe, the hot air can enter the air distribution cavity through the air distribution pipe, and then be transported to the conical tank through the air distribution holes, thereby drying the materials.

[0021] Optionally, baffle cloths are fixedly arranged in both the air distribution holes and the air outlet holes.

[0022] By adopting the above technical solution, the baffle cloth can block the materials and is not likely to affect the transportation of the hot air.

[0023] Optionally, moving grooves are formed in both the air inlet cavity and the connecting air cavity. The ends of the connecting air ring plate and the air expansion ring plate extend into the moving grooves, and balls are arranged between the bottom of the moving grooves and the connecting air ring plate and the air expansion ring plate respectively.

[0024] By adopting the above technical solution, the ball can make the air expansion ring plate and the air connection ring plate move more smoothly, so as to reduce the friction force received by the air expansion ring plate and the air connection ring plate.

[0025] In summary, the present application includes at least one of the following beneficial effects: 1. Start the first motor to drive the revolution arm to drive the stirring roller to rotate in the conical tank, so as to stir the material; at the same time, start the second motor to drive the stirring roller to rotate itself, so as to further stir the material to improve the stirring efficiency and effect; and the cooperation of revolution and rotation can make the material heat more evenly, so that the liquid phase in the material overflows faster.

[0026] 2. Convey the material into the conical tank; then, start the air heater and send hot air into the conical tank through the air filling pipe to dry the material; at the same time, start the vacuum pump to pump out the air and water vapor in the conical tank. On the one hand, the purpose of solid-liquid separation is achieved, and on the other hand, the vacuum degree in the conical tank is increased, so that the drying effect can be improved.

[0027] 3. The filter is used to filter the dust in the extracted gas to prevent damage to the vacuum pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram according to Embodiment 1 of the present application; Figure 2 is Figure 1 a schematic top view of Figure 3 is along Figure 2 the schematic cross-sectional view taken along the cutting line A-A in Figure 4 is a schematic structural diagram according to Embodiment 2 of the present application; Figure 5 is along Figure 4 the schematic cross-sectional view taken along the cutting line B-B in Figure 6 is Figure 5 a schematic partial enlarged view of part C in Figure 7 is Figure 5 a schematic partial enlarged view of part D in

[0029] In the figure: 1. Conical tank; 11. Air connecting cavity; 12. Air connecting groove; 13. Air distributing cavity; 14. Air distributing hole; 15. Moving groove; 16. Ball; 17. Material blocking cloth; 2. Stirring assembly; 21. Revolution arm; 22. Connecting arm; 23. Rotation arm; 24. Stirring roller; 241. Air outlet cavity; 242. Air outlet hole; 243. Ventilation hole; 25. First motor; 26. Second motor; 3. Drying assembly; 31. Vacuum pump; 32. Inflating pipe; 33. Air heater; 34. Filter; 4. Air connecting part; 41. Air connecting pipe; 42. Air connecting ring plate; 5. Transition part; 51. Outer ring plate; 511. Transition cavity; 52. Connecting rod; 53. Connecting ball; 6. Air expanding part; 61. Inner ring plate; 611. Ring groove; 612. Air inlet cavity; 613. Relief groove; 614. Air inlet hole; 62. Air expanding pipe; 63. Air expanding ring plate; 7. Air distributing part; 71. Air distributing pipe. Detailed implementation mode

[0030] This application provides a single-cone vacuum dryer.

[0031] Embodiment 1: Refer to Figure 1 , a single-cone vacuum dryer includes: a conical tank 1, and a feed inlet is arranged at the top end of the conical tank 1; a discharge pipe is arranged at the bottom end of the conical tank 1, and a valve is installed on the discharge pipe. A drying assembly 3 is arranged on the conical tank 1, and the drying assembly 3 includes: a vacuum pump 31, an inflating pipe 32 and an air heater 33, and the air heater 33 is installed on the top wall of the conical tank 1; one end of the inflating pipe 32 is connected to the air heater 33 and the other end is communicated with the conical tank 1.

[0032] Refer to Figure 1 , in the embodiment of this application, a maintenance hole may also be arranged at the top end of the conical tank 1, and a sensor may be arranged between the maintenance hole and the feed inlet to detect airtightness.

[0033] Refer to Figure 1 , the vacuum pump 31 is connected to the conical tank 1. During drying, the material (usually a wet solid-liquid mixture separated by a centrifuge) is conveyed into the conical tank 1; then, the air heater 33 is started, and hot air is sent into the conical tank 1 through the inflating pipe 32 to dry the material; at the same time, the vacuum pump 31 is started to pump out the air and water vapor in the conical tank 1, on the one hand, to achieve the purpose of solid-liquid separation, and on the other hand, to increase the vacuum degree in the conical tank 1, so as to improve the drying effect.

[0034] Refer to Figure 1 , further, the drying assembly 3 further includes: a filter 34, and the filter 34 is connected and installed between the vacuum pump 31 and the conical tank 1. The filter 34 is used to filter the dust in the extracted gas to prevent damage to the vacuum pump 31.

[0035] See Figure 2 and Figure 3 , a stirring assembly 2 is provided on the conical tank 1. The stirring assembly 2 includes: a revolution arm 21, a connecting arm 22, a rotation arm 23, a stirring roller 24, a first motor 25 and a second motor 26. The revolution arm 21 is arranged inside the conical tank 1; the first motor 25 is installed on the top wall of the conical tank 1, and the output shaft of the first motor 25 is coaxially fixed with the revolution arm 21. One end of the connecting arm 22 is fixedly connected to the revolution arm 21, and the other end is fixedly connected to the second motor 26.

[0036] See Figure 2 and Figure 3 , the output shaft of the second motor 26 is coaxially fixed with the stirring roller 24 through the rotation arm 23. In the embodiment of the present application, the stirring roller 24 is self - equipped with spiral blades. The stirring roller 24 is inclined, and the inclination of the stirring roller 24 is the same as the inclination of the hypotenuse of the conical tank 1. During drying, the first motor 25 is started to drive the revolution arm 21 to drive the stirring roller 24 to rotate inside the conical tank 1, so as to stir the material; at the same time, the second motor 26 is started to drive the stirring roller 24 to rotate itself, so as to further stir the material, improve the stirring efficiency and effect; and the cooperation of revolution and rotation can make the material heat more evenly, so that the liquid phase in the material overflows faster.

[0037] The working principle of Embodiment 1 is as follows: During drying, the material (usually the wet solid - liquid mixture separated by a centrifuge) is conveyed into the conical tank 1; then, the air heater 33 is started, and hot air is sent into the conical tank 1 through the air charging pipe 32 to dry the material; at the same time, the vacuum pump 31 is started to pump out the air and water vapor in the conical tank 1. On the one hand, the purpose of solid - liquid separation is achieved, and on the other hand, the vacuum degree in the conical tank 1 is increased, so as to improve the drying effect.

[0038] Embodiment 2: See Figure 4 and Figure 5 , the difference between this embodiment and Embodiment 1 is that an air - diffusing assembly is arranged between the stirring roller 24 and the air charging pipe 32. During drying, the air - diffusing assembly can, on the one hand, convey the hot air into the conical tank 1, and on the other hand, the hot air can enter the stirring roller 24; during the rotation and revolution of the stirring roller 24, the stirring roller 24 can output the hot air into the conical tank 1, so that the material can contact the hot air more evenly, thus improving the drying efficiency.

[0039] See Figure 6 and Figure 7 , the air - diffusing assembly includes: an air - distributing part 7, a gas - connecting part 4, a transition part 5 and an air - diffusing part 6.

[0040] See Figure 6 and Figure 7, the air distribution part 7 includes: an air distribution pipe 71. An annular air distribution cavity 13 is formed on the conical tank 1, and a plurality of air distribution holes 14 are formed through the side of the air distribution cavity 13 close to the inside of the conical tank 1 along the circumferential direction. One end of the air distribution pipe 71 is communicated with the air distribution cavity 13, and the other end is connected with the air connection part 4. When the hot air is conveyed by the air charging pipe 32, the hot air can enter the air distribution cavity 13 through the air distribution pipe 71, and then be conveyed into the conical tank 1 through the air distribution holes 14, so as to dry the materials.

[0041] See Figure 6 and Figure 7 , the air connection part 4 includes: an air connection pipe 41 and an air connection ring plate 42. An annular air connection cavity 11 is formed on the conical tank 1. The air connection cavity 11 is located above the air distribution cavity 13, and the air connection ring plate 42 is arranged in the air connection cavity 11; one end of the air charging pipe 32 far from the air heater 33 is communicated with the air connection cavity 11, and the air distribution pipe 71 is communicated and arranged between the air distribution cavity 13 and the air connection cavity 11.

[0042] See Figure 6 and Figure 7 , an annular air connection groove 12 is formed through the inner wall of the air connection cavity 11 far from the air charging pipe 32. One end of the air connection pipe 41 is connected with the transition part 5, and the other end penetrates through the air connection groove 12. The air connection groove 12 is used to make way for the air connection pipe 41 to allow the air connection pipe 41 to move; and the air connection pipe 41 is fixedly connected with the air connection ring plate 42 and penetrates through the air connection ring plate 42. During drying, the hot air is conveyed into the air connection cavity 11 by the air charging pipe 32, and then conveyed into the transition part 5 by the air connection pipe 41 for transition.

[0043] See Figure 6 and Figure 7 , the transition part 5 includes: an outer ring plate 51, a connecting rod 52 and a connecting ball 53. The outer ring plate 51 is sleeved on the stirring roller 24; an annular transition cavity 511 is formed on the outer ring plate 51, and one end of the air connection pipe 41 far from the air connection ring plate 42 is communicated with the transition. The connecting ball 53 is installed on the air expansion part 6. One end of the connecting rod 52 is fixedly connected with the inner wall of the outer ring plate 51, and the other end is fixedly connected with the connecting ball 53. During drying, the hot air is conveyed into the transition cavity 511 by the air connection pipe 41, and with the cooperation of the connecting rod 52 and the connecting ball 53, the stirring roller 24 can drive the air connection pipe 41 to move, and the stirring roller 24 itself can also rotate, so that the revolution and rotation of the stirring roller 24 are not easily affected during the air conveying process.

[0044] See Figure 6 and Figure 7, the air expansion part 6 includes: an inner ring plate 61, an air expansion pipe 62, and an air expansion ring plate 63. The inner ring plate 61 is fixedly sleeved on the stirring roller 24; a ring groove 611 is formed on the outer side wall of the inner ring plate 61, and the connecting ball 53 is arranged in the ring groove 611. In the embodiment of the present application, a plurality of connecting balls 53 are provided, and the connecting rod 52 corresponds to the connecting ball 53 one by one. An annular air inlet cavity 612 is formed on the inner ring plate 61, and an annular relief groove 613 is formed on the inner top wall of the air inlet cavity 612; the air expansion ring plate 63 is arranged in the air inlet cavity 612, and one end of the air expansion pipe 62 communicates with the transition cavity 511 and the other end passes through the relief groove 613. The air expansion pipe 62 is fixedly connected to the air expansion ring plate 63 and penetrates through the air expansion ring plate 63. When the stirring roller 24 rotates around its own axis and revolves around the axis of the cone tank 1, the air expansion pipe 62 can drive the air expansion ring plate 63 to rotate, so that it is not easy to affect the rotation of the stirring roller 24 around its own axis, and air can be continuously introduced.

[0045] See Figure 6 and Figure 7 , an air inlet hole 614 is formed through the inner side wall of the air inlet cavity 612; an air outlet cavity 241 is formed on the stirring roller 24, and an air vent hole 243 and a plurality of air outlet holes 242 are formed through the inner side wall of the air outlet cavity 241. The air vent hole 243 is communicated with the air inlet hole 614. When the stirring roller 24 rotates around its own axis and revolves around the axis of the cone tank 1, the hot air in the air inlet cavity 612 enters the air outlet cavity 241 through the air inlet hole 614 and the air vent hole 243, and finally enters the cone tank 1 through the air outlet holes 242, so as to dry the material.

[0046] See Figure 6 and Figure 7 , further, moving grooves 15 are formed on the inner walls of both the air inlet cavity 612 and the air connection cavity 11, and the ends of the air connection ring plate 42 and the air expansion ring plate 63 are arranged in the corresponding moving grooves 15; and a plurality of balls 16 are arranged between the bottom of the moving groove 15 and the air connection ring plate 42 and the air expansion ring plate 63 respectively. The balls 16 can make the movement of the air expansion ring plate 63 and the air connection ring plate 42 smoother, so as to reduce the friction force received by the air expansion ring plate 63 and the air connection ring plate 42.

[0047] See Figure 6 and Figure 7 , further, a baffle cloth 17 is fixedly arranged at one end of the air distribution hole 14 away from the air distribution cavity 13 and at one end of the air outlet hole 242 away from the air outlet cavity 241. The baffle cloth 17 can block the material and does not easily affect the transportation of the hot air.

[0048] The working principle of the second embodiment is as follows: By using the cooperation of the connecting rod 52 and the connecting ball 53, the stirring roller 24 can drive the connecting air pipe 41 to move, and the stirring roller 24 itself can also rotate around its own axis, so that the revolution and rotation of the stirring roller 24 are not easily affected during the air transportation process.

[0049] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A single cone vacuum dryer, characterized in that: include: A conical tank (1), wherein a stirring assembly (2) is arranged on the conical tank (1), and the stirring assembly (2) comprises: a revolution arm (21), a connecting arm (22), a self-rotating arm (23), a stirring roller (24), a first motor (25) and a second motor (26), wherein the first motor (25) is mounted on the conical tank (1), and an output shaft of the first motor (25) is coaxially fixed to the revolution arm (21), one end of the connecting arm (22) is fixed to the revolution arm (21), and the other end is fixed to the second motor (26), and the stirring roller (24) is coaxially fixed to the output shaft of the second motor (26) via the self-rotating arm (23).

2. The single cone vacuum dryer according to claim 1, characterized in that: The conical tank (1) is provided with a drying component (3), and the drying component (3) comprises: a vacuum pump (31), an air charging pipe (32) and an air heater (33). The vacuum pump (31) and the air heater (33) are both provided on the conical tank (1), and one end of the air charging pipe (32) is connected to the air heater (33), and the other end is connected to the conical tank (1).

3. The single cone vacuum dryer according to claim 2, characterized in that: The drying component (3) further comprises: a filter (34), wherein the filter (34) is arranged in communication between the vacuum pump (31) and the conical tank (1).

4. The single cone vacuum dryer according to claim 2, characterized in that: An air expansion component is arranged between the stirring roller (24) and the inflation tube (32), and the air expansion component includes: an air separation portion (7), an air connection portion (4), a transition portion (5) and an air expansion portion (6), wherein the air expansion portion (6) is arranged on the stirring roller (24), the transition portion (5) is arranged on the air expansion portion (6), the air connection portion (4) is arranged between the inflation tube (32) and the transition portion (5), and the air separation portion (7) is arranged between the air connection portion (4) and the conical tank (1).

5. The single cone vacuum dryer according to claim 4, characterized in that: The connecting part (4) comprises: a connecting pipe (41) and a connecting ring plate (42); a connecting cavity (11) is provided on the conical tank (1), and a connecting groove (12) is provided through the inner wall of the connecting cavity (11); the inflation pipe (32) is connected to the connecting cavity (11); the connecting ring plate (42) is arranged in the connecting cavity (11); one end of the connecting pipe (41) is connected to the transition part (5), and the other end passes through the connecting groove (12) and is fixed to the connecting ring plate (42); the connecting pipe (41) passes through the connecting ring plate (42); and the air dividing part (7) is arranged between the connecting cavity (11) and the conical tank (1).

6. The single cone vacuum dryer according to claim 5, characterized in that: The transition portion (5) comprises: an outer ring plate (51), a connecting rod (52) and a connecting ball (53); the connecting ball (53) is arranged on the air expansion portion (6); one end of the connecting rod (52) is connected to the connecting ball (53) and the other end is fixed to the outer ring plate (51); a transition cavity (511) is provided on the outer ring plate (51), and the connecting air pipe (41) is connected to the transition cavity (511).

7. The single cone vacuum dryer according to claim 6, characterized in that: The air expansion part (6) comprises: an inner ring plate (61), an air expansion pipe (62) and an air expansion ring plate (63); the inner ring plate (61) is coaxially sleeved on the stirring roller (24); the inner ring plate (61) is provided with an annular groove (611); the connecting ball (53) is arranged in the annular groove (611); the inner ring plate (61) is provided with an air inlet cavity (612); an inner wall of the air inlet cavity (612) is provided with an air inlet hole (614); the stirring roller (24) is provided with an air outlet cavity (24 1), and the inner wall of the air outlet cavity (241) is penetrated with an air vent (243) connected with the air inlet hole (614), the inner wall of the air inlet cavity (612) is penetrated with a clearance groove (613), the air expansion ring plate (63) is arranged in the air inlet cavity (612), one end of the air expansion pipe (62) is connected with the transition cavity (511), and the other end is penetrated with the clearance groove (613) and fixed with the air expansion ring plate (63), and the air expansion pipe (62) penetrates the air expansion ring plate (63).

8. The single cone vacuum dryer according to claim 7, characterized in that: The gas separation part (7) comprises: a gas separation pipe (71); a gas separation cavity (13) is provided on the conical tank (1); a gas separation hole (14) is provided through the inner wall of the gas separation cavity (13); one end of the gas separation pipe (71) is connected to the connecting cavity (11), and the other end is connected to the gas separation cavity (13).

9. The single cone vacuum dryer according to claim 8, characterized in that: The air distribution hole (14) and the air outlet hole (242) are both fixedly provided with a material blocking cloth (17).

10. The single cone vacuum dryer according to claim 9, characterized in that: A movable groove (15) is provided in the air inlet cavity (612) and the connecting cavity (11), the ends of the connecting ring plate (42) and the air expansion ring plate (63) extend into the movable groove (15), and a ball (16) is provided between the bottom of the movable groove (15) and the connecting ring plate (42) and the air expansion ring plate (63).

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