A vacuum drying apparatus

Abstract

The application discloses a vacuum drying device and belongs to the technical field of vacuum drying. The vacuum drying device comprises a conveying channel, characterized in that two chimneys are connected to the conveying channel, an air suction pipe is fixedly connected to the chimneys in communication, a filter tower is fixedly connected to one end of the air suction pipe away from the chimneys in communication, and an air suction device is connected to one end of the filter tower away from the air suction pipe. The application has the effect of reducing environmental pollution.

Description

Technical Field

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

[0002] Vacuum drying, also known as analytical drying, is a drying method in which materials are placed under vacuum and then heated to their boiling point or cooled to solidify before being dried to their melting point. From an environmental perspective, vacuum drying is also known as "green drying." Vacuum drying technology has been widely used in the drying of heat-sensitive materials in industries such as pharmaceuticals, chemicals, food, electronics, and traditional Chinese medicine.

[0003] In existing film-making processes, raw materials are typically first vacuum-dried and then transported to the extrusion stage via a conveyor channel. However, during the vacuum drying process, the high temperature may cause the raw materials to produce harmful substances. When the material is placed in a vacuum, these harmful substances are extracted into the environment along with the air, thus polluting the environment. Summary of the Invention

[0004] In order to reduce environmental pollution, this application provides a vacuum drying apparatus.

[0005] The vacuum drying apparatus provided in this application adopts the following technical solution:

[0006] A vacuum drying apparatus includes a conveying channel with two chimneys fixedly connected to it. A suction pipe is fixedly connected to each chimney. A filter tower is fixedly connected to the end of the suction pipe away from the chimney, and a suction device is connected to the end of the filter tower away from the suction pipe.

[0007] By adopting the above technical solution, when the conveying channel starts conveying raw materials, the staff turns on the air suction device. The air in the conveying pipeline is sucked out from the chimney by the air suction device and enters the filter tower through the air suction pipe to filter the gas and remove harmful substances from the gas, thereby reducing environmental pollution and protecting the environment.

[0008] Preferably, the air intake device includes a primary air intake pump, a secondary air intake pump, a tertiary air intake pump, and an absorption tower. The primary, secondary, and tertiary air intake pumps are connected in series, and the tertiary air intake pump is connected to the absorption tower.

[0009] By adopting the above technical solution, setting up three suction pumps can accelerate the extraction of air from the delivery pipeline and improve the vacuum level in the delivery pipeline.

[0010] Preferably, a filter plate is rotatably arranged inside the filter tower. The filter plate has an inner groove filled with filter material. Multiple filter holes are respectively formed on the opposite sidewalls of the filter plate. A drive assembly for driving the filter plate to rotate is provided on the filter tower. A through groove is formed on the peripheral sidewall of the filter plate. A barrier plate is provided at the through groove to seal the through groove. An inlet pipe and an outlet are respectively provided on the filter tower. A sealing assembly for sealing the filter tower is provided in both the inlet pipe and the outlet.

[0011] By adopting the above technical solution, when the filter plate is set horizontally to filter gas, the sealing component seals the filter tower to reduce gas leakage inside the filter tower. After long-term filtration, the filter material in the filter plate absorbs harmful substances and becomes saturated. When the filter material needs to be replaced, the filter plate rotates to a vertical position under the action of the drive component. The through groove on the filter plate is first aligned with the discharge port, the baffle plate opens, the sealing component opens, and the waste filter material in the filter plate flows into the next stage from the discharge port. At any time, the filter plate rotates to align the through groove with the feed pipe, the baffle plate opens, the sealing component in the feed pipe opens, and the new filter material enters the inner groove of the filter plate from the feed pipe, completing the replacement of the filter material.

[0012] Preferably, the drive assembly includes a first motor and a first rotating rod; the first motor is fixedly installed on the outer wall of the filter tower, one end of the first rotating rod is rotatably connected to the inner wall of the filter tower, the other end of the first rotating rod rotates and passes through the inner wall of the filter tower and is fixedly connected to the rotating shaft of the first motor, and the first rotating rod passes through and is fixedly connected to the filter plate.

[0013] By adopting the above technical solution, when the position of the rotating filter plate is needed, the operator starts the first motor. The rotation of the first motor shaft drives the first rotating rod to rotate, and the rotation of the first rotating rod drives the filter plate to rotate, thereby changing the position of the filter plate and facilitating the replacement of the filter material.

[0014] Preferably, the sealing assembly includes a sealing door, a first torsion spring, and a second rotating rod. The sealing door rotates around the discharge port, and the two ends of the second rotating rod are respectively fixedly connected to the inner wall of the discharge port. The sealing door is rotatably connected to the second rotating rod, and the two ends of the first torsion spring are respectively fixedly connected to the second rotating rod and the sealing door.

[0015] By adopting the above technical solution, when the filter plate is in a horizontal position, the sealing plate is closed under the action of the first torsion spring, thereby reducing the leakage of toxic gases in the filter tower; when the through groove on the filter plate is aligned with the discharge port and the baffle plate is open, the filter material in the filter plate moves down into the discharge port under the action of gravity. Under the gravity of the filter material, the sealing door rotates against the first torsion spring, thereby opening the sealing door and allowing the filter material to flow into the next stage from the discharge port; when all the filter material in the filter plate is discharged, the sealing door rotates and closes under the action of the first torsion spring.

[0016] Preferably, the inner wall of the through groove is provided with a sliding groove, the baffle plate slides in the sliding groove, a first arc-shaped block and a second arc-shaped block are fixedly connected to the baffle plate, both the first arc-shaped block and the second arc-shaped block are provided with telescopic grooves, an abutment block slides in the telescopic groove, a first spring is fixedly installed in the telescopic groove, the two ends of the first spring are respectively fixedly connected to the abutment block and the inner wall of the telescopic groove, and both abutment blocks abut against the inner wall of the filter tower; a limiting block is fixedly installed at the discharge port, the abutment block on the first arc-shaped block abuts against the discharge limiting block, and the abutment block on the second arc-shaped block abuts against the feed pipe; a limiting component for limiting the position of the baffle is provided in the sliding groove.

[0017] By adopting the above technical solution, when the filter plate is in a horizontal position, the abutting block abuts against the inner wall of the filter tower and compresses the first spring; when the through groove on the filter plate rotates towards the discharge port, the abutting block gradually moves away from the inner wall of the filter tower, and under the action of the first spring, the abutting block moves out of the telescopic groove and protrudes from the filter plate. As the filter plate gradually approaches the discharge port, the abutment block on the first arc-shaped block of the baffle plate abuts against the limiting block. The filter plate continues to rotate, and the abutment block on the first arc-shaped block is pushed horizontally under the action of the limiting block. The movement of the abutment block on the first arc-shaped block moves the baffle plate and opens the filter plate. After the filter material in the inner groove of the filter plate is emptied, the filter plate reverses direction, and the abutment block on the first arc-shaped block moves away from the limiting block. The baffle plate resets and closes the filter plate opening under the action of the limiting component. Similarly, when the filter plate rotates to the point where the baffle plate is close to the feed pipe, the abutment block on the second arc-shaped block abuts against the side wall of the feed pipe and moves the baffle plate to open the filter plate. After the new filter material is fed into the inner groove of the filter plate, the first motor prevents the filter plate from reversing to the horizontal direction. The abutment block on the second arc-shaped block moves away from the feed pipe, and the baffle plate moves to close the filter plate under the action of the limiting component, thereby reducing the possibility of filter material falling out of the inner groove of the filter plate.

[0018] Preferably, the limiting component includes a limiting block, a second spring, and a third spring. The inner wall of the slide groove is provided with a limiting groove. The limiting block slides in the limiting groove and is fixedly connected to the side wall of the barrier plate. The second spring and the third spring are respectively fixedly disposed on both sides of the limiting block.

[0019] By adopting the above technical solution, when the abutting block on the first arc-shaped block moves under the obstruction of the limiting block, the movement of the baffle plate causes the limiting block to compress the third spring and stretch the second spring to move. When the abutting block on the first arc-shaped block moves away from the limiting block, the limiting block, under the elastic force of the second and third springs, causes the baffle plate to move to the starting position and close the through slot. Similarly, when the abutting block on the second arc-shaped block abuts against the feed pipe, the movement of the baffle plate causes the limiting block to compress the second spring and stretch the third spring to move. When the abutting block on the second arc-shaped block moves away from the feed pipe, the limiting block, under the elastic force of the second and third springs, causes the baffle plate to close the through slot.

[0020] Preferably, a connecting rod is rotatably provided inside the filter plate, and the two ends of the connecting rod are respectively rotatably connected to the inner walls of the inner groove of the filter plate. A second motor is installed on the filter plate, and the shaft of the second motor is fixedly connected to one end of the connecting rod. A scraper is fixedly connected to the connecting rod.

[0021] By adopting the above technical solution, the rotation of the second motor shaft drives the connecting rod to rotate, and the rotation of the connecting rod drives the scraper to rotate in the inner groove of the filter plate, thereby smoothing the filter material in the inner groove of the filter plate, thus reducing the possibility of no or little filter material on the inner wall of the filter plate, which would reduce the filtration efficiency.

[0022] Preferably, a plurality of nail teeth are fixedly connected to the scraper, and the nail teeth slide within the filtered material.

[0023] By adopting the above technical solution, when the scraper rotates, it drives the nail teeth on it to rotate as well. The rotating nail teeth slide inside the filter material, thereby driving the filter material to tumble and move, thus improving the utilization rate of the filter material.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. When the conveyor starts conveying raw materials, the staff turns on the suction device. The air in the conveying pipeline is drawn out from the chimney by the suction device and enters the filter tower through the suction pipe to filter the gas and remove harmful substances from the gas, thereby reducing environmental pollution and protecting the environment.

[0026] 2. When the through groove on the filter plate rotates towards the discharge port and gradually approaches the discharge port, the first arc-shaped block on the baffle plate abuts against the limiting block. The filter plate continues to rotate, and the first arc-shaped block is pushed horizontally under the action of the limiting block. The movement of the first arc-shaped block drives the baffle plate to move and opens the through groove. When the filter material in the inner groove of the filter plate is emptied, the filter plate reverses direction, the first arc-shaped block moves away from the limiting block, and the baffle plate resets and closes the through groove under the action of the limiting component. Similarly, when the filter plate rotates to the point where the baffle plate is close to the feed pipe, the second arc-shaped block abuts against the side wall of the feed pipe and drives the baffle plate to move and open the through groove. When new filter material is input into the inner groove of the filter plate, the first motor prevents the filter plate from reversing to the horizontal direction. The second arc-shaped block moves away from the feed pipe, and the baffle plate moves to close the through groove under the action of the limiting component, thereby reducing the possibility of filter material falling out of the inner groove of the filter plate.

[0027] 3. The rotation of the second motor shaft drives the connecting rod to rotate, and the rotation of the connecting rod drives the scraper to rotate in the inner groove of the filter plate, thereby smoothing the filter material in the inner groove of the filter plate, thus reducing the possibility of no or little filter material on the inner wall of the filter plate, which would reduce the filtration efficiency. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of a vacuum drying device.

[0029] Figure 2 This is a schematic diagram of the structure of the filter plate in an embodiment of this application.

[0030] Figure 3 This is a schematic diagram of the structure of the prominent scraper in an embodiment of this application.

[0031] Figure 4 This is a schematic diagram of the structure of the feed pipe in an embodiment of this application.

[0032] Figure 5 yes Figure 4 Enlarged view of point A.

[0033] Figure 6 This is a schematic diagram of the structure of the prominent limiting block in an embodiment of this application.

[0034] Figure label:

[0035] 1. Conveying channel; 2. Chimney; 3. Suction pipe; 4. Filter tower; 5. Suction device; 6. Primary suction pump; 7. Secondary suction pump; 8. Tertiary suction pump; 9. Absorption tower; 10. Filter plate; 11. Filter holes; 12. Drive assembly; 13. Through groove; 14. Baffle plate; 15. Discharge port; 16. Feed pipe; 17. Sealing assembly; 18. First motor; 19. First rotating rod; 20. Sealing door ; 21. First torsion spring; 22. Second rotating rod; 23. Slide groove; 24. First arc-shaped block; 25. Second arc-shaped block; 26. Limiting block; 27. Limiting assembly; 28. Limiting block; 29. ​​Second spring; 30. Third spring; 31. Limiting groove; 32. Connecting rod; 33. Second motor; 34. Scraper; 35. Nail tooth; 36. Inner groove; 37. Abutment block; 38. Telescopic groove; 39. First spring. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0037] This application discloses a vacuum drying apparatus, such as... Figure 1 As shown, a vacuum drying device includes a conveying channel 1, a suction pipe 3, a filter tower 4, and a suction device 5. A spiral channel is installed inside the conveying channel for transporting raw materials, and the spiral channel can also heat the raw materials. Two chimneys 2 are connected to the conveying channel 1. The suction pipe 3 is Y-shaped, with the top two ends of the Y-shape fixedly connected to the two chimneys 2, and the bottom end of the Y-shape fixedly connected to the bottom side wall of the filter tower 4. The filter tower 4 is cylindrical, and a support component is provided at its lower end for supporting the filter tower 4. The suction device 5 includes a primary suction pump 6, a secondary suction pump 7, a tertiary suction pump 8, an absorption tower 9, and connecting pipes. The primary suction pump 6, secondary suction pump 7, and tertiary suction pump 8 are connected in series via the connecting pipes. The primary suction pump 6 is connected to the filter tower 4 via the connecting pipes, and the tertiary suction pump 8 is connected to the absorption tower 9 via the connecting pipes. A condensation component is installed inside the absorption tower 9 to cool and collect moisture from the air in the conveying channel.

[0038] like Figure 1As shown, before conveying raw materials through the conveying channel 1, the operators first activate the primary suction pump 6, the secondary suction pump 7, and the tertiary suction pump 8. As the raw materials advance through the conveying pipe and are heated for drying, the primary suction pump 6, the secondary suction pump 7, and the tertiary suction pump 8 work simultaneously to extract air from the conveying pipe, increasing the vacuum level. The air in the conveying pipe, along with substances produced by the raw materials at high temperatures, are collected through the chimney 2 and the suction pipe 3 into the filter tower 4. After harmful substances are filtered out by the filter tower 4, moisture and other substances in the air enter the absorption tower 9 and are cooled, condensed, and collected. This process removes harmful substances generated by the high temperatures of the raw materials, thereby reducing environmental pollution and protecting the environment.

[0039] As shown in Figure 2 and Figure 3 As shown, a filter plate 10 is installed inside the filter tower 4. The filter plate 10 is cylindrical, and its peripheral sidewalls abut against the inner wall of the filter tower 4. The filter plate 10 is rotatably installed inside the filter tower 4. An inner groove 36 is formed inside the filter plate 10, and the inner groove 36 is filled with filter material. In this embodiment, activated carbon can be selected as the filter material. Multiple filter holes 11 are vertically formed on the upper and lower opposite sidewalls of the filter plate 10. The filter holes 11 are dense and have a small diameter. The diameter of the filter material is larger than the diameter of the filter holes 11. Gas enters the inner groove 36 through the filter holes 11 on the lower end face of the filter plate 10. After being adsorbed by the filter material, it enters the upper half of the inner cavity of the filter tower 4 through the filter holes 11 on the upper end face of the filter plate 10 and is sucked into the connecting gas pipe. The filter tower 4 is equipped with a drive assembly 12 that drives the filter plate 10 to rotate. A through groove 13 is provided on the side wall of the filter plate 10. The through groove 13 is connected to the inner groove 36. The filter material in the inner groove 36 is replaced through the through groove 13. A baffle plate 14 is provided at the through groove 13. The baffle plate 14 is cuboid in shape and can close the opening of the through groove 13. A feed pipe 16 is fixedly embedded in the upper end face of the filter tower 4. The feed pipe 16 extends into the inner cavity of the filter tower 4. An outlet 15 is provided in the vertical direction on the lower end face of the filter tower 4. A sealing assembly 17 for sealing the filter tower 4 is provided in both the feed pipe 16 and the outlet 15.

[0040] like Figure 2 As shown, the drive assembly 12 includes a first motor 18 and a first rotating rod 19; the first motor 18 is fixedly installed on the outer wall of the filter tower 4, the first rotating rod 19 passes through the filter plate 10 in the horizontal direction, both ends of the first rotating rod 19 rotate on the inner wall of the filter tower 4, and one end of the first rotating rod 19 is fixedly welded to the rotating shaft of the first motor 18.

[0041] like Figure 4 and Figure 5As shown, the sealing assembly 17 includes a sealing door 20, a first torsion spring 21, and a second rotating rod 22. The sealing door 20 rotates inside the feed pipe 16. The two ends of the second rotating rod 22 are respectively fixedly welded to the opposite inner walls of the feed pipe 16. The sealing door 20 is rotatably connected to the side wall of the second rotating rod 22. The two ends of the first torsion spring 21 are respectively fixedly connected to the second rotating rod 22 and the sealing door 20.

[0042] like Figure 2 and Figure 3 As shown, when the filter plate 10 is in a horizontal position, the peripheral sidewall of the filter plate 10 abuts against the inner wall of the filter tower 4. After the gas in the suction pipe 3 enters the filter tower 4, it is filtered by the filter plate 10 and then passed to the next stage. When the filter plate 10 is filtering, the sealing door 20 in the discharge port 15 and the feed pipe 16 is closed under the action of the first torsion spring 21, thereby reducing the leakage of toxic gas in the filter tower 4. When the filter plate 10 has been filtering for a long time, the filter material inside the filter plate 10 will become saturated with harmful substances and need to be replaced. According to the test data, the staff will control the first motor 18 through the program. The first motor 18 will start and drive the first rotating rod 19 to rotate the filter plate 10 to a vertical position, so that the through groove 13 on the filter plate 10 is aligned with the discharge port 15. At this time, the baffle plate 14 will open, and the waste filter material in the filter plate 10 will fall from the through groove 13 into the discharge port 15. The sealing door 20 in the discharge port 15 will rotate under the action of the gravity of the filter material, overcoming the elastic force of the first torsion spring 21, so that the filter material flows from the discharge port 15 into the next stage. When all the filter material in the filter plate 10 is discharged, the sealing door 20 will rotate and close under the action of the first torsion spring 21.

[0043] like Figure 2 and Figure 3 As shown, after the waste filter material in the filter plate 10 is cleaned, the first motor 18 controls the filter to reverse 180 degrees, so that the through groove 13 on the filter plate 10 is aligned with the feed pipe 16. Then, the feed pipe 16 inputs new filter material. When the new filter material enters the feed pipe 16 and passes through the sealing door 20, the gravity of the filter material pushes the sealing door 20 to rotate and open, so that the new filter material enters the inner groove 36, completing the replacement of the filter material. When no new filter material enters the feed pipe 16, the sealing door 20 inside closes under the action of the first torsion spring 21.

[0044] like Figure 2 and Figure 6As shown, a sliding groove 23 is provided on the inner wall of the through groove 13. The upper and lower ends of the sliding groove 23 are fitted with baffle plates 14 that slide within the sliding groove 23. A first arc-shaped block 24 and a second arc-shaped block 25 are fixedly welded onto the baffle plates 14. Both the first arc-shaped block 24 and the second arc-shaped block 25 are arc-shaped. A telescopic groove 38 is provided on both the first arc-shaped block 24 and the second arc-shaped block 25. An abutment block 37 slides within the telescopic groove 38. Multiple first springs 39 are horizontally arranged within the telescopic groove 38. The two ends of the first springs 39 are fixedly welded to the abutment block 37 and the inner wall of the telescopic groove 38, respectively. When the first springs 39 are in their normal state, the abutment block 37 protrudes from the filter plate 10. When the filter plate 10 is in a horizontal state and its peripheral sidewall abuts against the inner wall of the filter tower 4, the abutment block 37 abuts against the inner wall of the filter tower 4, thereby preventing gaps between the filter plate 10 and the inner wall of the filter tower 4, which would affect the filtration effect.

[0045] like Figure 2 and Figure 6 As shown, a limiting block 26 is fixedly welded at the discharge port 15. When the filter plate 10 rotates downward, the abutment block 37 moves away from the inner wall of the filter tower 4. Under the action of the first spring 39, the abutment block 37 moves outward from the telescopic groove 38. When the filter plate 10 rotates quickly to the vertical direction, the abutment block 37 on the first arc-shaped block 24 abuts against the limiting block 26. When the filter plate 10 rotates vertically upward, the abutment block 37 on the second arc-shaped block 25 abuts against the side wall of the feed pipe 16. The slide 23 is provided with a limiting component 27 for limiting the position of the baffle plate 14. The limiting component 27 includes a limiting block 28, a second spring 29 and a third spring 30. The inner wall of the slide 23 is provided with a limiting groove 31. The limiting block 28 slides vertically in the limiting groove 31. The limiting block 28 is fixedly welded to the side wall of the baffle plate 14. The two ends of the second spring 29 are fixedly welded to the bottom inner wall of the slide 23 and the lower end face of the limiting block 28, respectively. The two ends of the third spring 30 are fixedly welded to the top inner wall of the slide 23 and the upper end face of the limiting block 28, respectively.

[0046] like Figure 2 and Figure 6As shown, when the filter material in the filter plate 10 needs to be replaced, the first motor 18 drives the through groove 13 on the filter plate 10 to rotate towards the discharge port 15. When the baffle plate 14 gradually approaches the discharge port 15, the abutting block 37 on the first arc-shaped block 24 on the baffle plate 14 abuts against the limiting block 26. The filter plate 10 continues to rotate, and the abutting block 37 on the first arc-shaped block 24 remains stationary under the resistance of the limiting block 26. At this time, the baffle plate 14 and the through groove 13 move relative to each other. The filter plate 10 continues to rotate, and one end of the baffle plate 14 slides out of the slide groove 23. The baffle plate 14 drives the limiting block 28 to compress the third spring 30 and stretch the second spring 29 to move. The sliding of the limiting block 28 in the limiting groove 31 can reduce the possibility of the baffle plate 14 falling out of the slide groove 23. When the filter plate 10 is rotated to a vertical position, the through groove 13 on the filter plate 10 is aligned with the discharge port 15. The filter material in the filter plate 10 falls to the through groove 13 under the action of gravity and is discharged from the filter tower 4 through the discharge port 15.

[0047] like Figure 2 and Figure 6 As shown, after the filter material in the filter plate 10 is emptied, the first motor 18 drives the filter plate 10 to rotate 180 degrees clockwise until the through groove 13 is aligned with the feed pipe 16. During the upward reverse rotation of the filter plate 10, the limiting block 28, under the elastic force of the second spring 29 and the third spring 30, drives the baffle plate 14 to gradually slide into the slide groove 23 relative to the filter plate 10 until the baffle plate 14 closes the opening of the through groove 13. Similarly, when the filter plate 10 rotates clockwise until the baffle plate 14 is close to the feed pipe 16, the abutting block 37 on the second arc-shaped block 25 abuts against the side wall of the feed pipe 16. The filter plate 10 continues to rotate, and the abutting block 37 on the second arc-shaped block 25 drives the baffle plate 14 to move relative to the filter plate 10, causing one end of the filter plate 10 to slide out of the slide groove 23, opening the through groove 13. At this time, the limiting block 28 moves with the baffle plate 14, compressing the second spring 29 and stretching the third spring 30. When the through groove 1... After aligning with the feed pipe 16, a new batch of filter material is fed into the filter plate 10 from the feed pipe 16. The first motor 18 drives the filter plate 10 to rotate counterclockwise downwards to the horizontal direction. During the rotation of the filter plate 10 away from the feed pipe 16, the limiting block 28 drives the barrier plate 14 to move relative to the filter plate 10 under the elastic force of the second spring 29 and the third spring 30. The barrier plate 14 slides in the slide groove 23 and gradually closes the opening of the through groove 13, thereby reducing the possibility of filter material falling off.

[0048] like Figure 3As shown, a connecting rod 32 is rotatably mounted inside the filter plate 10. The axis of the connecting rod 32 is vertically aligned, and its two ends are rotatably connected to the upper and lower opposing inner walls of the inner groove 36, respectively. A second motor 33 is fixedly mounted on the upper end face of the filter plate 10, and the shaft of the second motor 33 is fixedly welded to the top of the connecting rod 32. A scraper 34 is fixedly welded to the side wall of the connecting rod 32. The scraper is rectangular, and multiple nail teeth 35 are fixedly welded to the lower end face of the scraper 34. The bottom ends of the nail teeth 35 slide against the inner wall of the inner groove 36, and the nail teeth 35 slide within the filtered material. After the second motor 33 is turned on, it drives the connecting rod 32 to rotate. The rotation of the connecting rod 32 drives the scraper 34 to rotate in the inner groove 36, thereby smoothing the filter material in the inner groove 36 and making the filter material evenly distributed in the inner groove 36. This avoids the possibility of some areas without filter material or with a small amount of filter material, which could reduce the filtration efficiency. When the scraper rotates, it drives the nail teeth 35 on it to rotate as well. The nail teeth 35 rotate and slide in the filter material, thereby causing the filter material to turn and move, thus improving the utilization rate of the filter material.

[0049] The implementation principle of this application embodiment is as follows: during the transportation of raw materials in the conveying pipeline, the raw materials are heated and the conveying pipeline is evacuated to a vacuum state under the action of three suction pumps, thereby completing the vacuum drying of the raw materials and inputting them into the next stage of the process from the conveying pipeline; the air extracted from the conveying pipeline enters the filter tower 4 through the suction pipe 3. A filter plate 10 is installed inside the filter tower 4, and the filter plate 10 rotates inside the filter tower 4. A drive assembly 12 is installed inside the filter tower 4 to drive the filter plate 10 to rotate. A discharge port 15 is opened on the lower end face of the filter tower 4, and a feed pipe 16 is inserted and connected to the upper end face of the filter tower 4. An inner groove 36 is opened in the side wall of the filter plate 10, and the inner groove 36 is filled with filter material. A through groove 13 is opened in the side plate of the filter plate 10, and the through groove 13 is connected to the inner groove 36. A sliding groove 23 is opened in the inner wall of the through groove 13, and a baffle plate 14 slides in the sliding groove 23. The baffle plate 14 can close the through groove 13. A sealing assembly 17 for reducing gas leakage is installed in both the discharge port 15 and the feed pipe 16. When the filtered gas has been filtered for a long time, the filter material becomes saturated with harmful substances and needs to be replaced with new filter material. At this time, the drive assembly 12 drives the filter plate 10 to rotate. The filter plate 10 rotates to the outlet 15, the baffle plate 14 opens, the through groove 13 aligns with the outlet 15, and the sealing assembly 17 opens. The filter material in the inner groove 36 leaves from the through groove 13 and the outlet 15 under its own gravity. Then, the drive assembly 12 drives the filter plate 10 to rotate in reverse, so that the through groove 13 rotates to the feed pipe 16. The baffle plate 14 opens, the feed pipe 16 aligns with the through groove 13, and new filter material is transported in the feed pipe 16. The sealing assembly 17 in the feed pipe 16 is opened, and the filter material enters the inner groove 36 from the through groove 13. Finally, the drive assembly 12 drives the filter plate 10 to rotate to the horizontal direction, and the baffle plate 14 closes the through groove 13, completing the replacement of the filter material.

[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A vacuum drying apparatus, comprising a conveying channel (1), characterized in that: Two chimneys (2) are fixedly connected to the conveying channel (1). A suction pipe (3) is fixedly connected to the chimney (2). A filter tower (4) is fixedly connected to the end of the suction pipe (3) away from the chimney (2). A suction device (5) is connected to the end of the filter tower (4) away from the suction pipe (3). The air intake device (5) includes a primary air intake pump (6), a secondary air intake pump (7), a tertiary air intake pump (8), and an absorption tower (9). The primary air intake pump (6), the secondary air intake pump (7), and the tertiary air intake pump (8) are connected in series, and the tertiary air intake pump (8) is connected to the absorption tower (9). A filter plate (10) is rotatably arranged inside the filter tower (4). The filter plate (10) has an inner groove (36) filled with filter material. Multiple filter holes (11) are respectively opened on the opposite sidewalls of the filter plate (10). A drive assembly (12) for driving the filter plate (10) to rotate is provided on the filter tower (4). A through groove (13) is opened on the peripheral sidewall of the filter plate (10). A barrier plate (14) is provided at the through groove (13) to seal the through groove (13). An inlet pipe (16) and an outlet (15) are respectively provided on the filter tower (4). A sealing assembly (17) for sealing the filter tower (4) is provided in both the inlet pipe (16) and the outlet (15).

2. The vacuum drying apparatus according to claim 1, characterized in that: The drive assembly (12) includes a first motor (18) and a first rotating rod (19); the first motor (18) is fixedly installed on the outer wall of the filter tower (4), one end of the first rotating rod (19) is rotatably connected to the inner wall of the filter tower (4), the other end of the first rotating rod (19) rotates and passes through the inner wall of the filter tower (4) and is fixedly connected to the rotating shaft of the first motor (18), and the first rotating rod (19) passes through and is fixedly connected to the filter plate (10).

3. The vacuum drying apparatus according to claim 1, characterized in that: The sealing assembly (17) includes a sealing door (20), a first torsion spring (21), and a second rotating rod (22). The sealing door (20) rotates at the discharge port (15). The two ends of the second rotating rod (22) are respectively fixedly connected to the inner wall of the discharge port (15). The sealing door (20) is rotatably connected to the second rotating rod (22). The two ends of the first torsion spring (21) are respectively fixedly connected to the second rotating rod (22) and the sealing door (20).

4. The vacuum drying apparatus according to claim 1, characterized in that: The inner wall of the through groove (13) is provided with a sliding groove (23), the baffle plate (14) slides in the sliding groove (23), a first arc block (24) and a second arc block (25) are fixedly connected to the baffle plate (14), the first arc block (24) and the second arc block (25) are both provided with a telescopic groove (38), an abutment block (37) slides in the telescopic groove (38), a first spring (39) is fixedly provided in the telescopic groove (38), the two ends of the first spring (39) are respectively fixedly connected to the abutment block (37) and the inner wall of the telescopic groove (38), and both abutment blocks (37) abut against the inner wall of the filter tower (4); A limiting block (26) is fixedly provided at the discharge port (15), the abutting block (37) on the first arc-shaped block (24) abuts against the limiting block (26), and the abutting block (37) on the second arc-shaped block (25) abuts against the feed pipe (16); a limiting component (27) for limiting the position of the baffle plate (14) is provided in the chute (23).

5. A vacuum drying apparatus according to claim 4, characterized in that: The limiting component (27) includes a limiting block (28), a second spring (29), and a third spring (30). The inner wall of the slide (23) is provided with a limiting groove (31). The limiting block (28) slides in the limiting groove (31). The limiting block (28) is fixedly connected to the side wall of the barrier plate (14). The second spring (29) and the third spring (30) are respectively fixedly disposed on both sides of the limiting block (28).

6. The vacuum drying apparatus according to claim 1, characterized in that: A connecting rod (32) is rotatably disposed inside the filter plate (10). The two ends of the connecting rod (32) are respectively rotatably connected to the inner wall of the inner groove (36) of the filter plate (10). A second motor (33) is installed on the filter plate (10). The rotating shaft of the second motor (33) is fixedly connected to one end of the connecting rod (32). A scraper (34) is fixedly connected to the connecting rod (32).

7. A vacuum drying apparatus according to claim 6, characterized in that: A plurality of nail teeth (35) are fixedly connected to the scraper (34), and the nail teeth (35) slide within the filtered material.

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