Multi-shaft vacuum spiral dryer and drying method thereof

Abstract

The application discloses a multi-shaft vacuum spiral dryer and a drying method thereof, which are applied to the vacuum spiral dryer. The vacuum spiral dryer comprises a shell, a cover and a controller. The cover is fixedly connected to the top of the shell. The top of the cover is provided with a feeding port. The top of the cover is provided with a filtering assembly. The inside of the shell is provided with a spiral stirring assembly. One side of the shell is provided with a vacuum pumping assembly. The vacuum pumping assembly is connected with the filtering assembly. The spiral stirring assembly comprises two groups of connecting shafts one and two groups of connecting shafts two. The two groups of connecting shafts one are arranged above the two groups of connecting shafts two. The connecting shafts one and two are both in bearing connection with the shell. The connecting shafts two are in a hollow structure. The connecting shafts two are fixedly connected with spiral stirring plates outside. The spiral stirring plates are in a hollow structure. The device ensures that the temperature distribution in the drying chamber is uniform.

Description

Technical Field

[0001] This invention belongs to the technical field of vacuum spiral dryers, specifically relating to a multi-axis vacuum spiral dryer and its drying method. Background Technology

[0002] The most common explanation of a vacuum screw pump. It is essentially a screw conveyor, but its conveying pipes or chambers are designed to operate in a vacuum environment or a low-pressure environment.

[0003] The core component is a rotating helical shaft (screw) installed in a sealed tubular or trough-shaped housing to prevent air from entering the vacuum environment.

[0004] Initially, a higher temperature (within a safe range) can be used to quickly remove surface water and most of the free water. In the middle and later stages, the temperature should be reduced to gently remove bound water, avoiding thermal damage and surface hardening. Therefore, precise temperature control and temperature uniformity are required to ensure a uniform temperature distribution within the drying chamber.

[0005] However, the existing multi-axis vacuum spiral dryer cannot better guarantee the uniformity of temperature distribution, which has become a problem that urgently needs to be solved by people in this field. Summary of the Invention

[0006] The purpose of this invention is to provide a multi-axis vacuum spiral dryer and its drying method for existing material collection devices, in order to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a multi-axis vacuum spiral dryer and its drying method, comprising a shell, a cover and a controller, wherein the cover is fixedly connected to the top of the shell, the top of the cover is provided with a feed inlet, the top of the cover is provided with a filter assembly, the interior of the shell is provided with a spiral stirring assembly, and one side of the shell is provided with a vacuum assembly, the vacuum assembly being connected to the filter assembly;

[0008] The spiral stirring assembly includes two sets of connecting shaft one and two sets of connecting shaft two. The two sets of connecting shaft one are arranged above the two sets of connecting shaft two. Both the connecting shaft one and the connecting shaft two are connected to the housing by bearings.

[0009] The second connecting shaft is a hollow structure. A spiral stirring plate is fixedly connected to the outside of the second connecting shaft. The spiral stirring plate is a hollow structure and penetrates the hollow structure of the second connecting shaft. One end of the two sets of the second connecting shafts is connected to the second central pipe. The second central pipe is connected to a heat source. The other end of the second connecting shaft is connected to a gas collection tank.

[0010] The interior of the connecting shaft is hollow, and several scraper rods are fixed to the outside of the connecting shaft. The scraper rods are hollow and are connected to the hollow structure of the connecting shaft.

[0011] The present invention further illustrates that the two sets of connecting shafts are disposed above the two sets of connecting shafts, and both the connecting shafts are connected to the housing by bearings. Two sets of first drives are disposed on one side of the housing. Each set of first drives is connected to the connecting shafts by a gear transmission mechanism, and each set of connecting shafts is connected to the connecting shafts by a gear transmission mechanism.

[0012] The present invention further illustrates that a gap is formed between each spiral plate of the spiral stirring plate, and the spiral directions of the two sets of spiral stirring plates are opposite;

[0013] The scraper and each spiral plate of the spiral mixing plate form a corresponding gap.

[0014] The present invention further illustrates that the scraper rods are evenly distributed in three groups around the first connecting shaft, and the second connecting shaft rotates once, with a temperature sensor fixed on each group of scraper rods.

[0015] The present invention further illustrates that a flipping component is fixed on one side of the spiral stirring plate on the second connecting shaft. The flipping component includes a connecting sleeve, an installation sleeve is fixed to the outside of the connecting sleeve, and several sets of connecting rods are fixed to the outside of the installation sleeve. A flip plate is fixed to the end of the connecting rod. Each set of the second connecting shaft is provided with a flipping component, and the flipping component is located at the material flow direction position.

[0016] The present invention further describes that the filter assembly is wrapped and fixed on the cover body with a connecting shell, a connecting plate is fixed inside the connecting shell, four sets of filter cylinders are fixed below the connecting plate, a vibration motor is fixed inside the filter cylinder, the vibration motor is electrically connected to the controller, a connecting pipe is fixed at the top of each set of filter cylinders, a transmission pipe is connected to the connecting pipe, and a dust collector is connected to one end of the transmission pipe.

[0017] An installation tube is connected to one side of the connecting shell.

[0018] The present invention further explains that the vacuum assembly includes a condenser, a vacuum pump and a buffer tank. The buffer tank is disposed on one side of the housing. A vacuum tube is connected between the buffer tank and the vacuum pump. A gas pipe is connected between the buffer tank and the condenser. A gas pipe is connected between the mounting pipe and the condenser.

[0019] The condenser is connected to gas pipe three and gas pipe four at the bottom;

[0020] One end of each of the two sets of connecting shafts is connected to a central tube. A gas pipe is connected between the central tube and the heat source. A second air pump is connected to the gas pipe. A gas delivery pipe is connected to the gas pipe. A valve is installed on the gas delivery pipe. A heat pipe is connected between the gas delivery pipe and the heat source. A first air pump is connected to the heat pipe.

[0021] The present invention further illustrates that the central pipe 2 is connected to valve 2 and valve 4, the air pipe 5 is connected to air pump 2, and the air pipe 5 is connected to an air delivery pipe.

[0022] The present invention further describes that the procedure includes the following steps:

[0023] Step 1: Mix the materials, and use a scraper to prevent the spiral mixing plate from clogging while mixing;

[0024] Step 2: Simultaneously control the vacuuming component to create a vacuum inside the housing. When the air passes through the filter component, impurities in the air are filtered out.

[0025] Step 3: When the hot gas flows through the condenser, the gas is cooled by heat exchange in the condenser, and the cooled gas is stored in the buffer tank.

[0026] Step 4: After the material inside the shell is dry, control the cylinder piston head to open and discharge the material from the outlet.

[0027] The present invention further explains that step one includes the following specific steps:

[0028] Step 1-a: During the operation of the scraper, the temperature on the scraper is monitored in real time by the temperature sensor on the scraper to ensure that the temperature on the scraper is within a suitable range;

[0029] Step 1-b: When the spiral stirring plate is working, the temperature gauge on the cover monitors the internal temperature of the shell in real time to ensure that the overall temperature inside the shell is within a suitable range.

[0030] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The present invention uses a connecting shaft one, a connecting shaft two, and scrapers to transfer the hot air in the heat source to the central tube through a heat pipe, and then to the connecting shaft one, and then to each scraper, so that the distribution is uniform and the temperature of the dried material is uniform when the scrapers are working. Attached Figure Description

[0031] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0032] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0033] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0034] Figure 3 This is a front view of the overall structure of the present invention;

[0035] Figure 4 This is a three-dimensional schematic diagram of the spiral stirring plate of the present invention;

[0036] Figure 5 This is a side view of the spiral stirring plate of the present invention;

[0037] Figure 6 This is the present invention. Figure 2 A magnified view of a portion of region A;

[0038] Figure 7 This is a schematic diagram of the pipeline of the present invention. Figure 1 ;

[0039] Figure 8 This is a schematic diagram of the pipeline of the present invention. Figure 2 ;

[0040] In the diagram: 1. Shell; 2. Connecting shell; 3. Buffer tank; 4. Vacuum pump; 5. Condenser; 6. Cover; 7. Inlet; 8. Connecting shaft one; 9. Connecting shaft two; 10. First drive; 11. Air pipe three; 12. Air pipe four; 13. Spiral stirring plate; 14. Scraper; 15. Connecting sleeve; 16. Mounting sleeve; 17. Connecting rod; 18. Flip plate; 19. Connecting plate; 20. Air pipe two; 21. 21. Filter cartridge; 22. Transmission pipe; 23. Connecting pipe; 24. Dust collector; 25. Installation pipe; 26. Vacuum tube; 27. Gas pipe one; 28. Heat source; 29. ​​Valve one; 30. Air pump one; 31. Heat pipe; 32. Central pipe one; 33. Central pipe two; 34. Valve two; 35. Valve four; 36. Gas delivery pipe; 37. Gas pipe five; 38. Gas collection tank; 39. Air pump two; 40. Pressure gauge. Detailed Implementation

[0041] The following detailed, non-limiting description of the technical solution of the present invention, in conjunction with preferred embodiments and accompanying drawings, is provided. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0042] Please see Figure 1-8The present invention provides a technical solution: a multi-axis vacuum spiral dryer and its drying method, comprising a shell 1, a cover 6 and a controller. The cover 6 is fixedly connected to the top of the shell 1. The top of the cover 6 is provided with a feed inlet 7 and a filter assembly. The interior of the shell 1 is provided with a spiral stirring assembly, and a vacuum assembly is provided on one side of the shell 1. The vacuum assembly is connected to the filter assembly.

[0043] The controller is located on one side of housing 1 (not shown in the figure).

[0044] The spiral stirring assembly includes two sets of connecting shaft 1 (8) and two sets of connecting shaft 2 (9). The two sets of connecting shaft 1 (8) are positioned above the two sets of connecting shaft 2 (9). Both connecting shaft 1 (8) and connecting shaft 2 (9) are connected to the housing 1 by bearings. Two sets of first drives (10) are provided on one side of the housing 1. The first drives (10) can be motors. Each set of first drives (10) is connected to the connecting shaft 2 (9) by a gear transmission mechanism 1, and each set of connecting shaft 2 (9) is connected to the connecting shaft 1 (8). When the first drives (10) are started, the connecting shaft 2 (9) can be rotated through the gear transmission mechanism 1. When the connecting shaft 2 (9) rotates, the connecting shaft 1 (8) rotates synchronously through the gear transmission mechanism 2.

[0045] Connecting shaft 2 9 is a hollow structure, and a spiral stirring plate 13 is fixedly connected to its exterior. The spiral stirring plate 13 is also hollow, and it penetrates the hollow structure of connecting shaft 2 9. One end of both sets of connecting shaft 2 9 is connected to a central pipe 2 33, which is connected to a heat source 28. The other end of connecting shaft 2 9 is connected to a gas collection tank 38. Activating the heat source allows hot air to flow through connecting shaft 2 9 and into the spiral stirring plate 13, transferring heat to the material. The hot air then flows out from the other end of connecting shaft 2 9. When the spiral stirring plate 13 is working, it pushes the material from one end of the shell 1 to the other end.

[0046] The spiral mixing plate 13 forms a gap between each spiral plate (e.g. Figure 3 As shown), the two sets of spiral stirring plates 13 have opposite spiral directions.

[0047] The interior of connecting shaft 18 is hollow, and several scraper rods 14 are fixed to the outside of connecting shaft 18. The scraper rods 14 are hollow and communicate with the hollow structure of connecting shaft 18. A gap is formed between each spiral plate of the spiral mixing plate 13 and the scraper rod 14. As connecting shaft 18 rotates with connecting shaft 29, the scraper rods 14 on connecting shaft 18 can enter the gaps between the spiral plates of the spiral mixing plate 13, scraping off the material stuck in these gaps, thus improving the mixing efficiency of the spiral mixing plate 13.

[0048] Three sets of scraper rods 14 are evenly distributed around the first connecting shaft 8. When the second connecting shaft 9 rotates once, all three sets of scraper rods 14 on the first connecting shaft 8 are used. A temperature sensor (not shown in the figure) is fixed on each set of scraper rods 14.

[0049] A flipping component is fixed on one side of the spiral stirring plate 13 on the second connecting shaft 9. The flipping component includes a connecting sleeve 15, an mounting sleeve 16 is fixed to the outside of the connecting sleeve 15, and several sets of connecting rods 17 are fixed to the outside of the mounting sleeve 16. A flipping plate 18 is fixed to the end of each connecting shaft 17. Each set of connecting shafts 9 is equipped with a flipping component, which is located at the material flow direction. When the spiral stirring plate 13 drives the material flow to the end of the second connecting shaft 9, the flipping component rotates with the second connecting shaft 9, flipping the material at the end of the second connecting shaft 9 to another connecting shaft 9. Then, the spiral stirring plate 13 on the other connecting shaft 9 pushes the material to the flipping component of the other connecting shaft 9 (e.g., ...). Figure 7 As shown, the material is controlled to rotate back and forth within the shell 1 through the cooperation of two sets of flipping components, ensuring that the material can be dried in time.

[0050] One side of the connecting rod 17 is arc-shaped (e.g., Figure 4 As shown in the image, it can flip more materials at once.

[0051] The filter assembly is wrapped and fixed to the connecting shell 2 on the cover 6. A connecting plate 19 is fixed inside the connecting shell 2. Four sets of filter cylinders 21 are fixed below the connecting plate 19. A vibration motor (not shown in the figure) is fixed inside the filter cylinder 21. The vibration motor is electrically connected to the controller. When the vibration motor is started, it drives the filter cylinder 21 to vibrate and shake off the blockage impurities. A connecting pipe 23 is fixed to the top of each set of filter cylinders 21. A transmission pipe 22 is connected to the connecting pipe 23. One end of the transmission pipe 22 is connected to a dust collector 24. The gas is filtered through the four sets of filter cylinders 21. The filtered gas enters the transmission pipe 22 through the connecting pipe 23 and then enters the dust collector 24, ensuring that the gas extracted from the vacuum dryer is clean.

[0052] An installation tube 25 is connected to one side of the connecting shell 2.

[0053] The vacuum assembly includes a condenser 5, a vacuum pump 4, and a buffer tank 3. The buffer tank 3 is located on one side of the housing 1. A vacuum tube 26 connects the buffer tank 3 to the vacuum pump 4. A gas tube 27 connects the buffer tank 3 to the condenser 5. A gas tube 20 connects the mounting tube 25 to the condenser 5. A pressure gauge 40 is connected to the gas tube 20. The pressure gauge 40 is electrically connected to the controller. When the vacuum pump 4 is started, the gas in the buffer tank 3 is drawn in through the vacuum tube 26. Then, the gas tube 27 draws the heat exchange gas in the condenser 5 into the buffer tank 3. The gas tube 20 draws the gas out of the housing 1, thus creating a vacuum inside the housing 1.

[0054] Below the condenser 5 are gas pipe 3 11 and gas pipe 4 12.

[0055] One end of each of the two sets of connecting shafts 1-8 is connected to a central pipe 32 (not shown in the figure). A gas pipe 37 connects the central pipe 32 to the heat source 28. A second air pump 39 is connected to the gas pipe 37. A gas delivery pipe 36 is connected to the gas pipe 31. A valve 29 is installed on the gas delivery pipe 36. A heat pipe 31 connects the gas delivery pipe 36 to the heat source 28. A first air pump 30 is connected to the heat pipe 31. External cold gas is transferred to the condenser 5 through a fourth gas pipe 12. After heat exchange, it becomes hot gas and flows out through a third gas pipe 11. Then, it enters the heat source 28 through the gas delivery pipe 36. Because the heat source 28 contains a heating device, the heated gas is activated by the second air pump 39 and transferred to the central pipe 32, then enters the connecting shaft 1-8 and is distributed onto the scraper 14. The scraper scrapes down the material while simultaneously drying it. The hot gas after heat exchange flows out through the other end of the connecting shaft 8, further ensuring the uniform heat distribution of the material.

[0056] The central pipe 233 is connected to valve 234 and valve 435, which can be metering valves.

[0057] A thermometer and a vacuum gauge are installed on the top of the cover 6. A discharge port (not shown in the figure) is opened at the bottom of the shell 1. A cylinder piston head is installed below the discharge port. When it is necessary to discharge material, the cylinder piston head is opened to discharge the material from the discharge port.

[0058] A drying method using a multi-axis vacuum spiral dryer includes the following steps:

[0059] Step 1: Stir the materials, and use the scraper 14 to prevent the spiral mixing plate 13 from clogging while stirring.

[0060] Specifically, the material is fed in through the feed inlet 7, the first drive 10 is started to control the rotation of the connecting shaft 8 and the connecting shaft 9, and the external heat source 28 is transmitted to the connecting shaft 9 and the spiral stirring plate 13 to dry and stir the material. At the same time, hot air is controlled to enter the connecting shaft 8 so that the scraper 14 transfers heat to the material. When the scraper 14 runs in the gap between the spiral stirring plates 13, it can also play a drying role.

[0061] It should be noted that the temperature of heat source 28 is higher than the temperature of the air exiting from condenser 5.

[0062] Step 2: Simultaneously control the vacuuming to evacuate the inside of housing 1. When the air passes through the filter component, impurities in the air will be filtered out.

[0063] Specifically, when the gas inside the housing 1 passes through the filter cartridge 21, the dust collector 24 is activated to draw impurities from the gas passing through the filter cartridge 21 into the dust collector 24 through the transmission pipe 22 and the connecting pipe 23, thereby removing impurities from the air inside the housing 1.

[0064] It should be added that the housing 1 can also be operated under a slight negative pressure, but a vacuum state and a slight negative pressure state cannot be operated at the same time.

[0065] Step 3: When the hot gas flows through the condenser 5, the gas is cooled by heat exchange in the condenser 5, and the cooled gas is stored in the buffer tank 3.

[0066] Step 4: After the material inside shell 1 is dried, control the cylinder piston head to open and discharge the material from the outlet.

[0067] Furthermore, the cylinder piston head can be open continuously or intermittently, allowing the material to flow out intermittently or continuously, depending on the material requirements.

[0068] When the shell 1 is under vacuum or slight negative pressure, the material can flow out continuously or intermittently.

[0069] Step one also includes the following specific steps:

[0070] Step 1-a: When the scraper 14 is in operation, the temperature on the scraper 14 is monitored in real time by the temperature sensor on the scraper 14 to ensure that the temperature on the scraper 14 is within a suitable range.

[0071] Specifically, when the temperature on the monitored scraper 14 is lower than the normal material temperature, the control valve 29 is closed, the air pump 39 is turned on, and the hot air in the heat source 28 is transferred through the air pipe 37 to the central pipe 32, then to the connecting shaft 8, and finally to each scraper 14, so that the distribution is uniform and the temperature of the dried material is uniform when the scraper 14 is working.

[0072] Step 1-b: When the spiral stirring plate 13 is working, the temperature gauge on the cover 6 monitors the inside of the shell 1 in real time to ensure that the overall temperature inside the shell 1 is within a suitable range.

[0073] Specifically, when the temperature monitored by the thermometer is higher than the temperature suitable for the material, valves 2 (34) and 4 (35) are controlled to reduce the amount of hot air entering the connecting shaft 2 (9), thereby lowering the temperature inside the connecting shaft 2 (9) and subsequently lowering the temperature inside the shell 1, preventing the drying temperature from being too high and affecting the material properties. When the thermometer detects that the temperature inside the shell 1 is within the suitable temperature range, the hot air from the heat source 28 continues to enter the connecting shaft 2 (9) to continue the stirring process.

[0074] It should be added that the temperature value monitored by the thermometer is determined according to the material conditions.

[0075] Furthermore, when the temperature gauge detects that the temperature exceeds the appropriate range and then returns to the appropriate temperature range, the controller records the time of temperature change to ensure drying quality.

[0076] Specifically, when the temperature exceeds the suitable temperature range, the controller starts timing, marked as t1. When the temperature inside the housing 1 recovers to the suitable temperature range through step one-b, this time period is recorded as t2. Under normal circumstances, the temperature inside the housing 1 reaches the suitable temperature range in A seconds. When the time difference between t2 and t1 is greater than A seconds, it indicates that the temperature inside the housing 1 is dropping slowly, and the heat source intake of the connecting shaft 8 can be shut off so that the temperature inside the housing 1 reaches the suitable temperature range.

[0077] When the temperature gauge detects that the temperature inside shell 1 has reached a suitable range, it continues to monitor the temperature inside shell 1 in real time. When the temperature rises again, the duration of the rise is determined and set to B seconds. For example, if the time it takes for the temperature inside shell 1 to rise from the suitable temperature to the critical value of the suitable temperature is less than the set B seconds, it indicates that the material is dissipating heat quickly during the stirring process, which can easily affect the overall temperature inside shell 1. In this case, the vacuum pump 4 is controlled to increase its power and speed up the gas extraction, thus removing the high-temperature gas from inside shell 1 more quickly.

[0078] Step two includes the following specific operational steps:

[0079] Step 2-a: While filtering the gas, monitor whether the filter cartridge 21 is blocked, which will affect the gas transmission and consequently affect the temperature stability inside the shell 1.

[0080] Specifically, when gas passes through gas pipe 20, the pressure on gas pipe 20 is monitored in real time by pressure gauge 40 and transmitted to the controller. When a change in pressure on gas pipe 20 is detected, it indicates that the filter holes on filter cartridge 21 are blocked. If the time it takes for the temperature inside housing 1 to rise from the suitable temperature to the critical temperature is less than the set value of B seconds, it indicates that filter cartridge 21 is blocked and affecting gas transmission. The vibration motor is started to drive filter cartridge 21 to vibrate, while pressure gauge 40 monitors the pressure on gas pipe 20 in real time. When the pressure returns to normal and the temperature inside housing 1 is within the suitable temperature range, it indicates that the blockage and impurities on filter cartridge 21 have been cleared. If the temperature inside housing 1 continues to rise, air pump 29 is turned off to stop the transmission of hot gas to connecting shaft 8, reducing the temperature rise inside housing 1. The vibration motor is kept running to continue removing impurities and prevent them from affecting vacuuming.

[0081] Step 2-b: The purified gas flows through the installation pipe 25 into the gas pipe 20, and then enters the condenser 5 to achieve gas recovery.

[0082] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features, and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-axis vacuum spiral dryer, comprising a shell (1), a cover (6), and a controller, characterized in that: The cover (6) is fixedly connected to the top of the shell (1). The top of the cover (6) is provided with a feed inlet (7). The top of the cover (6) is provided with a filter assembly. The interior of the shell (1) is provided with a spiral stirring assembly. A vacuum assembly is provided on one side of the shell (1). The vacuum assembly is connected to the filter assembly. The spiral stirring assembly includes two sets of connecting shaft one (8) and two sets of connecting shaft two (9). The two sets of connecting shaft one (8) are arranged above the two sets of connecting shaft two (9). Both the connecting shaft one (8) and the connecting shaft two (9) are connected to the housing (1) by bearings. The second connecting shaft (9) is a hollow structure. A spiral stirring plate (13) is fixedly connected to the outside of the second connecting shaft (9). The spiral stirring plate (13) is a hollow structure. The spiral stirring plate (13) and the hollow structure of the second connecting shaft (9) are interconnected. One end of the two sets of the second connecting shafts (9) is connected to the second central pipe (33). The second central pipe is connected to a heat source (28). The other end of the second connecting shaft (9) is connected to a gas collection tank (38). The interior of the connecting shaft (8) is hollow, and several scraper rods (14) are fixed on the outside of the connecting shaft (8). The scraper rods (14) are hollow and are connected to the hollow structure of the connecting shaft (8). The spiral stirring plates (13) have gaps between each spiral plate, and the spiral directions of the two sets of spiral stirring plates (13) are opposite. The scraper (14) and each spiral plate of the spiral stirring plate (13) form a corresponding gap; The scraper (14) is evenly distributed in three groups around the first connecting shaft (8). When the second connecting shaft (9) rotates once, all three groups of scraper (14) on the first connecting shaft (8) are used up. Each group of scraper (14) is fixed with a temperature sensor. A flipping component is fixed on one side of the spiral stirring plate (13) on the second connecting shaft (9). The flipping component includes a connecting sleeve (15), an installation sleeve (16) is fixed to the outside of the connecting sleeve (15), and several sets of connecting rods (17) are fixed to the outside of the installation sleeve (16). A flip plate (18) is fixed to the end of the connecting rod (17). Each set of the second connecting shaft (9) is provided with a flipping component, and the flipping component is located at the material flow direction position. One end of each of the two sets of connecting shafts (8) is connected to a central tube (32). A five-spindle (37) is connected between the central tube (32) and the heat source (28). An air pump (39) is connected to the five-spindle (37). A gas delivery pipe (36) is connected to the three-spindle (11). A valve (29) is installed on the gas delivery pipe (36). A heat pipe (31) is connected between the gas delivery pipe (36) and the heat source (28). An air pump (30) is connected to the heat pipe (31). The central tube 2 (33) is connected to valve 2 (34) and valve 4 (35), and the air pump 2 (39) is connected to the air pipe 5 (37). The air pipe 5 (37) is connected to the air supply pipe (36).

2. The multi-axis vacuum spiral dryer according to claim 1, characterized in that: Two sets of first drives (10) are provided on one side of the housing (1). Each set of first drives (10) is connected to a gear transmission mechanism (9) and the second connecting shaft (9). Each set of second connecting shaft (9) is connected to a gear transmission mechanism (8).

3. A multi-axis vacuum spiral dryer according to claim 2, characterized in that: The filter assembly is wrapped and fixed to the connecting shell (2) on the cover (6). A connecting plate (19) is fixed inside the connecting shell (2). Four sets of filter cylinders (21) are fixed below the connecting plate (19). A vibration motor is fixed inside the filter cylinder (21). The vibration motor is electrically connected to the controller. A connecting pipe (23) is fixed at the top of each set of filter cylinders (21). A transmission pipe (22) is connected to the connecting pipe (23). A dust collector (24) is connected to one end of the transmission pipe (22). The connecting shell (2) is connected to an installation tube (25) on one side.

4. A multi-axis vacuum spiral dryer according to claim 3, characterized in that: The vacuum assembly includes a condenser (5), a vacuum pump (4), and a buffer tank (3). The buffer tank (3) is located on one side of the housing (1). A vacuum tube (26) is connected between the buffer tank (3) and the vacuum pump (4). A gas pipe (27) is connected between the buffer tank (3) and the condenser (5). A gas pipe (20) is connected between the mounting pipe (25) and the condenser (5). The condenser (5) is connected to the bottom of the gas pipe three (11) and the gas pipe four (12).

5. A drying method using a multi-axis vacuum spiral dryer, comprising the multi-axis vacuum spiral dryer as described in claim 4, characterized in that: The following steps are included: Step 1: Stir the materials and use a scraper (14) to prevent the spiral mixing plate (13) from clogging while stirring; Step 2: Simultaneously control the operation of the vacuum pumping component to evacuate the housing (1). When the air passes through the filter component, the impurities in the air are filtered out. Step 3: When the hot gas flows through the condenser (5), the gas is cooled by heat exchange through the condenser (5), and the cooled gas is stored in the buffer tank (3); Step 4: After the material inside the shell (1) is dried, control the cylinder piston head to open and discharge the material from the outlet.

6. The drying method of a multi-axis vacuum spiral dryer according to claim 5, characterized in that: Step one also includes the following specific steps: Step 1-a: When the scraper (14) is in operation, the temperature on the scraper (14) is detected in real time by the temperature sensor on the scraper (14) to ensure that the temperature on the scraper (14) is within a suitable range; Step 1-b: When the spiral stirring plate (13) is working, the thermometer on the cover (6) monitors the problem inside the shell (1) in real time to ensure that the overall temperature inside the shell (1) is within a suitable range.

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