A rotary vacuum pulverizing dryer

Abstract

The application provides a rotary vacuum crushing and drying machine, which comprises a rack, a power mechanism, a crushing cylinder rotatably connected to the rack, an inlet opening arranged at one end of the crushing cylinder, a discharge pipe fixedly connected to the other end of the crushing cylinder, a valve fixed to the discharge pipe, a cover plate arranged on the inlet opening, a crushing knife fixedly connected to the inner wall of the crushing cylinder and arranged in an X shape, a fixed pipe fixedly connected to the outer wall of the crushing cylinder and rotatably connected to the rack, the power mechanism drives the fixed pipe to rotate along the horizontal axis of the crushing cylinder, a support pipe fixedly connected to the side of the crushing cylinder away from the power mechanism, the support pipe being rotatably connected to the rack and coaxially arranged with the fixed pipe, a heat pipe rotatably connected to the support pipe, the heat pipe being fixedly connected to the rack, the support pipe being in communication with the heat pipe, the crushing cylinder having a cavity in communication with the support pipe, and the end of the crushing cylinder being provided with a discharge pipe in communication with the cavity, so that the crushing and drying effects are improved.

Description

Technical Field

[0001] This invention relates to a drying apparatus, and more particularly to a rotary vacuum pulverizing dryer. Background Technology

[0002] To better dry lumpy materials, they need to be crushed.

[0003] Currently, Chinese patent CN207463382U discloses a pulverizer. The key technical features of the pulverizer include a support and a material receiving chamber set on the support. The upper end of the material receiving chamber is provided with an inlet leading to the interior of the material receiving chamber. The material receiving chamber includes an upper chamber, a fixed chamber, and a lower chamber. A pulverizing wheel is rotatably connected in the fixed chamber. The upper chamber and the lower chamber are respectively flipped and connected to the upper and lower sides of the fixed chamber. The outer walls on both sides of the fixed chamber are provided with snap-fit ​​devices that are snap-fitted to the upper chamber and the lower chamber, respectively. A drive device for driving the pulverizing wheel to rotate is provided on one side of the fixed chamber.

[0004] This type of shredder makes it easy to clean up any remaining twigs or leaves in the material chamber. However, during production, when the material has a high moisture content, it becomes sticky and tough, requiring more shredding time and resulting in poorer shredding efficiency. Summary of the Invention

[0005] In view of this, the purpose of this invention is to provide a rotary vacuum pulverizer and dryer to improve the pulverizing effect.

[0006] To solve the above-mentioned technical problems, the technical solution of the present invention is: a rotary vacuum pulverizing and drying machine, comprising a frame and a power mechanism, a pulverizing cylinder rotatably connected to the frame, a feed inlet at one end of the pulverizing cylinder and a discharge pipe fixedly connected to the other end, a valve fixedly fixed to the discharge pipe, a cover plate provided on the feed inlet, X-shaped crushing blades fixedly connected to the inner wall of the pulverizing cylinder, a fixed pipe rotatably connected to the frame fixedly connected to the outer wall of the pulverizing cylinder, the power mechanism driving the fixed pipe to rotate along the transverse axis of the pulverizing cylinder, a support pipe fixedly connected to the side of the pulverizing cylinder away from the power mechanism, the support pipe rotatably connected to the frame and coaxially arranged with the fixed pipe, a heat pipe rotatably connected to the support pipe, the heat pipe fixedly connected to the frame, the support pipe communicating with the heat pipe, a cavity communicating with the support pipe inside the pulverizing cylinder, and a discharge pipe communicating with the cavity at the end of the pulverizing cylinder.

[0007] To achieve the above technical solution, the material is poured into the crushing cylinder from the feed inlet, and a cover plate is placed on the feed inlet. Then, the heat medium is injected into the support pipe through the heat pipe, and then into the cavity through the support pipe to heat the material in the crushing cylinder. Water vapor is discharged from the gap between the cover plate and the feed inlet. Then, the power mechanism is turned on, which causes the fixed pipe to drive the crushing cylinder to rotate. The crushing blades come into contact with the material and crush it, thereby greatly improving the crushing and drying effect. After crushing is completed, the valve is opened, and the crushed material is discharged from the discharge pipe.

[0008] In a preferred embodiment of the present invention, a drive motor is fixedly connected to the outer wall of the crushing cylinder near the discharge pipe, and a support is fixedly connected to the inner wall of the crushing cylinder. A first cutter and a second cutter are rotatably connected to the support. When the drive motor is started, the first cutter and the second cutter move and rotate in opposite directions through a transmission structure.

[0009] To achieve the above technical solution, the drive motor is started, and the first cutter and the second cutter move and rotate in opposite directions through the transmission mechanism, so as to greatly improve the crushing effect on the material.

[0010] In a preferred embodiment of the present invention, the transmission structure includes a first slide rod, a second slide rod, a linkage assembly, a first branch pipe, a second branch pipe, a first spiral groove, a second spiral groove, a first support rod, a second support rod, a first rotating shaft, and a second rotating shaft. The first slide rod and the second slide rod are slidably connected to the support and arranged in parallel. The drive motor causes the first slide rod and the second slide rod to move in opposite directions through the linkage assembly. One end of the first rotating shaft is rotatably connected to the first slide rod, and the other end of the first rotating shaft is fixedly connected to the first cutter. One end of the second rotating shaft is rotatably connected to the second slide rod, and the other end of the second rotating shaft is fixedly connected to the first cutter. The first branch pipe and the second branch pipe are fixedly connected to the second cutter. The first branch pipe and the second branch pipe are fixed on the support. The first rotating shaft is located inside the first branch pipe and the second rotating shaft is located inside the second branch pipe. The first spiral groove is opened on the outer wall of the first branch pipe and communicates with the inner wall of the first branch pipe. The second spiral groove is opened on the outer wall of the second branch pipe and communicates with the inner wall of the second branch pipe. One end of the first support rod is fixed to the outer wall of the first rotating shaft and the other end of the first support rod is located in the first spiral groove. One end of the second support rod is fixed to the outer wall of the second rotating shaft and the other end of the second support rod is located in the second spiral groove.

[0011] To achieve the above technical solution, when the drive motor starts, the first slide rod and the second slide rod translate along the support. The first slide rod drives the first rotating shaft to move along the length of the first branch pipe. At the same time, the first branch rod moves along the first spiral groove, causing the first rotating shaft to rotate. This causes the first cutter to rotate while moving. Similarly, the second cutter also rotates while moving. Furthermore, the linkage component causes the first slide rod and the second slide rod to move in opposite directions, resulting in the first cutter and the second cutter moving in opposite directions. When the first cutter moves forward, the second cutter moves backward, allowing more material to come into contact with the first cutter and the second cutter, thereby greatly improving the crushing effect on the material.

[0012] In a preferred embodiment of the present invention, the linkage assembly includes a rocker arm, a connecting shaft, a first straight groove, a second straight groove, a first fixed post, a second fixed post, a first connecting rod, and a second connecting rod. The connecting shaft is rotatably connected to a support. The middle part of the rocker arm is fixedly connected to the connecting shaft. The first straight groove and the second straight groove are respectively opened at both ends of the rocker arm and are both arranged along the length direction of the rocker arm. One end of the first fixed post is fixedly connected to a first sliding rod, and the other end of the first fixed post is located in the first straight groove. One end of the second fixed post is fixedly connected to a second sliding rod, and the other end of the second fixed post is located in the second straight groove. One end of the first connecting rod is fixedly connected to a drive motor, and the other end is hinged to the second connecting rod. The end of the second connecting rod away from the first connecting rod is hinged to the first fixed post.

[0013] To achieve the above technical solution, the drive motor starts, the first connecting rod rotates, the first connecting rod drives the second connecting rod to move, the first fixed column drives the first sliding rod to move along the length direction of the first sliding rod, and at the same time, the first fixed column abuts against the inner wall of the first straight groove, causing the first fixed column to move along the length direction of the first straight groove while the swing rod rotates along the axis of the connecting shaft, and then the inner wall of the second straight groove abuts against the second fixed column, causing the second fixed column to move along the length direction of the second straight groove while the second fixed column drives the second sliding rod to move along the length direction of the second sliding rod, thereby realizing the reverse movement between the first sliding rod and the second sliding rod.

[0014] In a preferred embodiment of the present invention, auxiliary blades are fixedly connected to the ends of both the first and second support rods.

[0015] To achieve the above technical solution, while the first support rod and the second support rod drive the first rotating shaft and the second rotating shaft to rotate respectively, the auxiliary blade can crush the material, thereby further improving the crushing effect.

[0016] As a preferred embodiment of the present invention, it further includes a positioning tube, which is inserted into the fixed tube and rotatably connected to the fixed tube. A connecting tube is connected to the end of the positioning tube, and the connecting tube communicates with the positioning tube. An air suction head is fixedly connected to the connecting tube, and the air suction head has a plurality of air suction holes communicating with the inner wall of the connecting tube.

[0017] To achieve the above technical solution, the heat medium is injected into the support tube through the heat pipe, and then into the cavity through the support tube to heat the material inside the crushing drum. At the same time, the air pump is turned on, and the air suction head draws away the water vapor from the crushing drum. Furthermore, due to the reduction of air pressure inside the crushing drum, the boiling point of the material is lowered, making it easier for the moisture on the material to separate from the material when heated, thus greatly improving the drying and crushing effect.

[0018] As a preferred embodiment of the present invention, the end of the connecting tube near the positioning tube has an upwardly bent guide section.

[0019] To achieve the above technical solution, during the process of material crushing, the suction head is not easily submerged in the material, so that the suction holes on the suction head are not easily blocked.

[0020] As a preferred embodiment of the present invention, a protective sleeve is fixedly connected to the outer wall of the connecting tube, the suction head is located inside the protective sleeve, and the protective sleeve is provided with a protective structure for dust prevention of the suction head.

[0021] By implementing the above technical solutions, the protective sleeve and protective structure can further improve the dustproof effect on the vacuum cleaner head.

[0022] In a preferred embodiment of the present invention, the protective structure includes a sleeve, an extension rod, a sealing ring, and a contact plate. The sleeve is fixed to the inner wall of the protective sleeve, the extension rod is slidably connected to the sleeve, the inner wall of the sealing ring is fixedly connected to the extension rod, the outer wall of the sealing ring abuts against the inner wall of the sleeve, there is a space between the inner wall of the sleeve and the extension rod, the contact plate is fixed to the end of the extension rod away from the sleeve, and the contact plate has a contact arc surface for abutting against the outer wall of the suction head. The two contact plates are arranged opposite to each other.

[0023] To achieve the above technical solution, when the air pump is started, the suction head draws air out of the crushing cylinder. As the air pressure inside the crushing cylinder decreases, the air pressure in the space gradually becomes greater than the air pressure inside the crushing cylinder, causing the extension rod to move along the length of the sleeve. This causes the contact arc surface on the contact plate to abut against the outer wall of the suction head. During the rotation of the crushing cylinder, it is less likely for a large amount of material to fall onto the suction head, thereby greatly improving the protection of the suction head.

[0024] In a preferred embodiment of the present invention, a fluororubber layer is fixedly connected to the inner wall of the contact arc surface, and the contact arc surface abuts against the outer wall of the suction head through the fluororubber layer.

[0025] To achieve the above technical solution, the contact arc surface abuts against the outer wall of the suction head through the fluororubber layer, which provides a better wrapping effect for the suction head and further enhances its protective function. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention.

[0027] Figure 2 This is a side view diagram illustrating the structure of the present invention;

[0028] Figure 3 A three-dimensional schematic diagram illustrating the conductive structure;

[0029] Figure 4 A schematic diagram showing the position of the drive shaft;

[0030] Figure 5 A cross-sectional schematic diagram to illustrate the protective structure.

[0031] Reference numerals: 1. Frame; 11. Power mechanism; 2. Crushing cylinder; 21. Fixed pipe; 22. Feed inlet; 23. Discharge pipe; 24. Cover plate; 25. Valve; 3. Crushing blade; 4. Support pipe; 41. Heat pipe; 42. Cavity; 43. Discharge pipe; 5. Drive motor; 50. Power shaft; 51. First cutter; 52. Second cutter; 53. Support; 6. Conducting structure; 61. First slide rod; 62. Second slide rod; 63. First branch pipe; 64. Second branch pipe; 65. First spiral groove; 66. Second spiral groove; 67. First support rod; 68. Second support rod 691. First rotating shaft; 692. Second rotating shaft; 7. Linkage assembly; 71. Swing rod; 72. Connecting shaft; 73. First straight groove; 74. Second straight groove; 75. First fixed post; 76. Second fixed post; 77. First connecting rod; 78. Second connecting rod; 79. Auxiliary knife; 81. Positioning tube; 82. Connecting tube; 83. Guide section; 84. Suction head; 85. Suction hole; 90. Protective sleeve; 9. Protective structure; 91. Sleeve; 92. Extension rod; 93. Sealing ring; 94. Contact plate; 941. Contact arc surface; 95. Return spring; 96. Fluororubber layer. Detailed Implementation

[0032] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, so that the technical solution of the present invention can be more easily understood and mastered.

[0033] A rotary vacuum pulverizer and dryer includes a frame 1 and a power mechanism 11. A fixing pipe 21 is fixedly connected to the side wall of a pulverizing cylinder 2. The fixing pipe 21 is horizontally arranged and its axis is parallel to the transverse axis of the pulverizing cylinder 2. The fixing pipe 21 is rotatably connected to the frame 1. The power mechanism 11 drives the transverse axis of the fixing pipe 21 to rotate.

[0034] A feed inlet 22 is provided at the upper end of the crushing cylinder 2, and a discharge pipe 23 is fixedly connected to the lower end. A valve 25 is fixed on the discharge pipe 23, and a cover plate 24 is provided on the feed inlet 22. The valve 25 is a butterfly valve. The material is placed into the crushing cylinder 2 through the feed inlet 22, and after the material is crushed, it is discharged from the discharge inlet.

[0035] An X-shaped crushing blade 3 is fixedly connected to the inner wall of the crushing cylinder 2. A support pipe 4 is fixedly connected to the side of the crushing cylinder 2 away from the power mechanism 11. The support pipe 4 is rotatably connected to the frame 1 and coaxially arranged with the fixed pipe 21. A heat pipe 41 is rotatably connected to the end of the support pipe 4, and the support pipe 4 communicates with the heat pipe 41. The heat pipe 41 is fixedly connected to the frame 1. The interior of the crushing cylinder 2 has a cavity 42 communicating with the support pipe 4, and a discharge pipe 43 communicating with the cavity 42 is opened at the end of the crushing cylinder 2. The heating medium is injected into the support pipe 4 through the heat pipe 41, then into the cavity 42 through the support pipe 4, and then discharged from the discharge pipe to heat and dry the material in the crushing cylinder 2. The heating medium is steam or hot water.

[0036] A drive motor 5 is fixedly connected to the outer wall of the crushing cylinder 2 near the discharge pipe 23. A support 53 is fixedly connected to the inner wall of the crushing cylinder 2. A first cutter 51 and a second cutter 52 are provided on the support 53. The drive motor 5 is started and the first cutter 51 and the second cutter 52 move and rotate in opposite directions through the transmission structure 6.

[0037] The transmission structure 6 includes a first slide rod 61, a second slide rod 62, a linkage assembly 7, a first branch pipe 63, a second branch pipe 64, a first spiral groove 65, a second spiral groove 66, a first support rod 67, a second support rod 68, a first rotating shaft 691, and a second rotating shaft 692. The first slide rod 61 and the second slide rod 62 are slidably connected to the support 53 and arranged in parallel. Both the first slide rod 61 and the second slide rod 62 are rectangular parallelepipeds.

[0038] One end of the first rotating shaft 691 is rotatably connected to the end of the first sliding rod 61, and the other end of the first rotating shaft 691 is fixedly connected to the first cutter 51. One end of the second rotating shaft 692 is rotatably connected to the end of the second sliding rod 62, and the other end of the second rotating shaft 692 is fixedly connected to the second cutter 52. The ends of the first branch pipe 63 and the second branch pipe 64 are both fixed to the support 53, with the first rotating shaft 691 located inside the first branch pipe 63 and the second rotating shaft 692 located inside the second branch pipe 64.

[0039] A first spiral groove 65 is formed on the outer wall of the first branch pipe 63 and communicates with the inner wall of the first branch pipe 63. A second spiral groove 66 is formed on the outer wall of the second branch pipe 64 and communicates with the inner wall of the second branch pipe 64. One end of the first support rod 67 is fixed to the outer wall of the first rotating shaft 691, and the other end of the first support rod 67 is located in the first spiral groove 65. One end of the second support rod 68 is fixed to the outer wall of the second rotating shaft 692, and the other end of the second support rod 68 is located in the second spiral groove 66.

[0040] At this time, as the first slide bar 61 and the second slide bar 62 move along their respective length directions, the first support rod 67 moves along the length direction of the first spiral groove 65, and the second support rod 68 moves along the length direction of the second spiral groove 66, thereby causing the first support rod 67 to drive the first rotating shaft 691 to rotate, and the second support rod 68 to drive the second rotating shaft 692 to rotate, so that the first cutter 51 and the second cutter 52 can rotate while moving.

[0041] The drive motor 5 causes the first slide bar 61 and the second slide bar 62 to move in opposite directions via the aforementioned linkage assembly 7. The linkage assembly 7 includes a rocker arm 71, a connecting shaft 72, a first straight groove 73, a second straight groove 74, a first fixed post 75, a second fixed post 76, a first connecting rod 77, and a second connecting rod 78. The connecting shaft 72 is rotatably connected to the middle of the support 53, and the middle of the rocker arm 71 is fixedly connected to the connecting shaft 72. The first straight groove 73 and the second straight groove 74 are respectively located at both ends of the rocker arm 71 and are both arranged along the length of the rocker arm 71.

[0042] One end of the first fixing post 75 is fixedly connected to the first sliding rod 61, and the other end of the first fixing post 75 is located in the first straight groove 73; one end of the second fixing post 76 is fixedly connected to the second sliding rod 62, and the other end of the second fixing post 76 is located in the second straight groove 74.

[0043] One end of the first link 77 is fixedly connected to the power shaft 50 of the drive motor 5, and the other end is hinged to the second link 78. The end of the second link 78 away from the first link 77 is hinged to the first fixed post 75. The length of the second link 78 is four times the length of the first link 77.

[0044] When the drive motor 5 starts, the power shaft 50 rotates, and the first connecting rod 77 rotates along the axis of the power shaft 50. Simultaneously, the second connecting rod 78 swings, driving the first sliding rod 61 to move along its length direction via the first fixed column 75. At the same time, the first fixed column 75 abuts against the inner wall of the first straight groove 73, causing the swing rod 71 to rotate along the axis of the connecting shaft 72. This causes the inner wall of the second straight groove 74 to abut against the second fixed column 76, causing the second fixed column 76 to move along its length direction. Simultaneously, the second fixed column 76 drives the second sliding rod 62 to move along its length direction, thus achieving reverse movement between the first and second sliding rods 61 and 62. That is, when the first sliding rod 61 moves forward, the second sliding rod 62 moves backward; when the first sliding rod 61 moves backward, the second sliding rod 62 moves forward. The first cutting blade 51 and the second cutting blade 52 move synchronously to ensure thorough crushing of the material.

[0045] An auxiliary blade 79 is fixedly connected to the ends of both the first support rod 67 and the second support rod 68.

[0046] The positioning tube 81 is inserted into the fixed tube 21 and rotatably connected to it. A connecting tube 82 is fixedly connected to the end of the positioning tube 81, and the connecting tube 82 communicates with the positioning tube 81. An air suction head 84 is fixedly connected to the connecting tube 82. At the end of the connecting tube 82 near the positioning tube 81, there is an upwardly bent guide section 83 to allow the air suction head 84 to extend upwards. The air suction head 84 has multiple air suction holes 85 that communicate with the inner wall of the connecting tube 82. The end of the positioning tube 81 is connected to an air pump.

[0047] A cylindrical protective sleeve 90 is fixedly connected to the outer wall of the connecting pipe 82. The suction head 84 is located inside the protective sleeve 90. A protective structure 9 for dust prevention of the suction head 84 is provided on the protective sleeve 90.

[0048] The protective structure 9 includes a sleeve 91, an extension rod 92, a sealing ring 93, and a contact plate 94. The sleeve 91 is fixed to the inner wall of the protective sleeve 90. The extension rod 92 has a square-section hole in its middle. A cuboid rod is fixedly connected to the inner wall of the sleeve 91 and slidably connected to the hole. The inner wall of the sealing ring 93 is fixedly connected to the extension rod 92, and the outer wall of the sealing ring 93 abuts against the inner wall of the sleeve 91. There is a space between the inner wall of the sleeve 91 and the extension rod 92. A return spring 95 is provided in the space, and its two ends are fixedly connected to the inner wall of the sleeve 91 and the extension rod 92, respectively.

[0049] Organic oil is applied to the inner wall of the sleeve 91 so that the sealing ring 93 can move smoothly along the length of the sleeve 91, while ensuring a good seal between the sealing ring 93 and the sleeve 91.

[0050] The contact plate 94 is fixed to the end of the extension rod 92 away from the sleeve 91, and the contact plate 94 is located outside the sleeve 91. A contact arc surface 941 is provided on the contact plate 94, which is used to abut against the outer wall of the suction head 84. The two contact plates 94 are arranged opposite to each other.

[0051] A fluororubber layer 96 is fixedly connected to the inner wall of the contact arc surface 941, and the contact arc surface 941 abuts against the outer wall of the suction head 84 through the fluororubber layer 96.

[0052] When the air pump starts, the suction head 84 draws air out of the crushing cylinder 2. As the air pressure inside the crushing cylinder 2 decreases, the air pressure in the surrounding space gradually becomes greater than that inside the crushing cylinder 2, causing the extension rod 92 to move along the length of the sleeve 91. The return spring 95 is stretched, causing the contact arc surface 941 on the contact plate 94 to come into contact with the outer wall of the suction head 84. During the rotation of the crushing cylinder 2, it is less likely for a large amount of material to fall onto the suction head 84, thus greatly improving the protection of the suction head 84. After the material is crushed and dried, the air pump injects air into the crushing cylinder 2. The air pressure inside the crushing cylinder 2 is equal to the air pressure in the surrounding space, and the return spring 95 returns to its original position, causing the extension rod 92 to return to its original position.

[0053] During operation, the heat medium is injected into the heat pipe 41 while the air pump is turned on, heating the material and simultaneously extracting air and moisture from the crushing cylinder 2. This lowers the boiling point of the material and water, increasing the dehydration speed. After the fluororubber layer 96 contacts the suction head 84, the power mechanism 11 is activated, causing the fixed pipe 21 to rotate, which in turn rotates the crushing cylinder 2. Under the combined action of the first cutter 51, the second cutter 52, and the crushing blade 3, the material is crushed and pulverized. Finally, the material is discharged from the discharge pipe 23.

[0054] The power mechanism 11 is a servo motor.

[0055] Of course, the above are just typical examples of the present invention. In addition, the present invention may have many other specific embodiments. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by the present invention.

Claims

1. A rotary vacuum fluid energy mill comprising a frame, a power mechanism, characterized in that: The rack is rotatably connected with a crushing cylinder, one end of the crushing cylinder is provided with a feeding port, the other end is fixedly connected with a discharge pipe, the discharge pipe is fixedly provided with a valve, the feeding port is provided with a cover plate, the inner wall of the crushing cylinder is fixedly connected with a crushing knife arranged in X shape, the outer wall of the crushing cylinder is fixedly connected with a fixed pipe rotatably connected to the rack, the power mechanism drives the fixed pipe to rotate along the transverse axis of the crushing cylinder, the side of the crushing cylinder away from the power mechanism is fixedly connected with a support pipe, the support pipe is rotatably connected to the rack and coaxially arranged with the fixed pipe, the support pipe is rotatably connected with a heat pipe, the heat pipe is fixedly connected to the rack, the support pipe and the heat pipe are in communication, the crushing cylinder has a cavity in communication with the support pipe, the end of the crushing cylinder is provided with a discharge pipe in communication with the cavity, and a positioning pipe is further arranged, the positioning pipe penetrates into the fixed pipe and is rotatably connected with the fixed pipe, the end of the positioning pipe is connected with a connecting pipe, the connecting pipe is in communication with the positioning pipe, the connecting pipe is fixedly connected with a suction head, a plurality of suction holes in communication with the inner wall of the connecting pipe are formed in the suction head, the end of the connecting pipe close to the positioning pipe has an upwardly bent guide section, the outer wall of the connecting pipe is fixedly connected with a protective sleeve, the suction head is located in the protective sleeve, a protection structure for dustproof of the suction head is arranged on the protective sleeve, the protection structure comprises a sleeve, an extension rod, a sealing ring and a contact plate, the sleeve is fixed to the inner wall of the protective sleeve, the extension rod is slidingly connected in the sleeve, the inner wall of the sealing ring is fixedly connected with the extension rod, the outer wall of the sealing ring is in abutment with the inner wall of the sleeve, a space is formed between the inner wall of the sleeve and the extension rod, the contact plate is fixed to the end of the extension rod away from the sleeve, a contact arc surface is formed in the contact plate, the contact arc surface is used for abutting against the outer wall of the suction head, and two contact plates are oppositely arranged.

2. A rotary vacuum fluidized bed dryer according to claim 1, characterized in that: The outer wall of the end of the crushing cylinder close to the discharge pipe is fixedly connected with a driving motor, the inner wall of the crushing cylinder is fixedly connected with a support, the support is rotatably connected with a first cutting knife and a second cutting knife, the driving motor is started and drives the first cutting knife and the second cutting knife to move in opposite directions and rotate through a transmission structure.

3. A rotary vacuum fluidized bed dryer according to claim 2, characterized in that: The conductive structure comprises a first sliding rod, a second sliding rod, a linkage assembly, a first branch pipe, a second branch pipe, a first spiral groove, a second spiral groove, a first supporting rod, a second supporting rod, a first rotating shaft and a second rotating shaft.

4. A rotary vacuum fluidized bed dryer according to claim 3, characterized in that: The linkage assembly comprises a swing rod, a connecting shaft, a first straight groove, a second straight groove, a first fixed column, a second fixed column, a first connecting rod and a second connecting rod.

5. A rotary vacuum fluidised bed dryer according to claim 3 or 4, characterised in that: The end of the first supporting rod and the end of the second supporting rod are fixedly connected with auxiliary knives.

6. A rotary vacuum fluidized bed dryer according to claim 1, characterized in that: The inner wall of the contact arc surface is fixedly connected with a fluorine rubber layer, and the contact arc surface is in contact with the outer wall of the air suction head through the fluorine rubber layer.

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