Air ultrafine pulverizer and preparation method of porous carbon material

Abstract

The invention relates to the technical field of crushing equipment, and discloses an air ultrafine pulverizer and a porous carbon material preparation method.The air ultrafine pulverizer comprises a rack, a pulverizing chamber installed on the rack, a feeding system assembly, a feeding pipe and an air conveying pipe, and an upper exhaust pipe and a lower exhaust pipe which correspond to each other in position are fixed to the pulverizing chamber; and an upper slope surface is arranged at the joint of the upper exhaust pipe and the crushing chamber. A part of materials is sucked out by increasing the discharging suction force, the part of materials are collected and weighed, the base number of the material amount in the pulverizing chamber is reflected through the material amount collected in unit time, finally the feeding amount of the pulverizer is controlled according to the material amount, in this way, the situation that the material amount in the pulverizer is too large or too small can be avoided, and the pulverizing efficiency is improved. The material amount is kept within a proper threshold value, the pulverizing efficiency of the pulverizer is guaranteed, when the material amount in the pulverizing chamber is too large, the driving assembly and the valve assembly can further accelerate discharging of the materials in the pulverizing chamber, and regulation and control are more efficient compared with a mode of only adjusting the feeding amount.

Description

Technical Field

[0001] The present invention relates to the technical field of crushing equipment, and particularly to an air ultrafine mill and a preparation method of porous carbon materials. Background Art

[0002] The air jet mill is a common material crushing equipment, which is provided with a crushing chamber. The feeding end of the crushing chamber is connected to a material feeding system, and the discharging end of the crushing chamber is connected to a cyclone separator, a dust collector and a draft fan. When in operation, the compressed air is dried and then sprayed into the crushing chamber at a high speed through the Laval nozzle on the side wall. The material is crushed in the crushing chamber through friction and shearing. The fine particles with smaller particle sizes are discharged through the discharging end, and the coarse particles remain in the crushing chamber for continuous crushing.

[0003] Such mills have certain deficiencies in actual use: the amount of material in the crushing chamber of the mill is an important factor to ensure the grinding efficiency. When the amount of material is small, the collision and contact between materials are less, resulting in a lower grinding efficiency. However, when the amount of material is large, the risk of material blockage in the crushing chamber increases. In actual application, the amount of material in the mill cannot be visually observed, and the material in the crushing chamber is suspended under the action of air flow, and the amount of material cannot be accurately reflected by weight, making it difficult to measure. Only when blockage occurs can the feeding amount be reduced to passively control, which affects the working efficiency of the mill and the stability of the system, and also reduces the service life of the mill. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides an air ultrafine mill and a preparation method of porous carbon materials, which have the advantages of being convenient for detecting the amount of material and adaptively regulating, improving the crushing efficiency, etc., and solve the problems that the existing air jet mill cannot accurately monitor the amount of material inside the crushing chamber, and thus it is not easy to regulate the feeding amount, increasing the probability of blockage in the crushing chamber or reducing the crushing efficiency.

[0005] To solve the above technical problems, the present invention provides the following technical solution: an air ultrafine mill, comprising a frame, a crushing chamber installed on the frame, a feeding system assembly, a feeding pipe and an air delivery pipe. The crushing chamber is fixed with an upper exhaust pipe and a lower exhaust pipe corresponding in position. An uphill surface is provided at the connection between the upper exhaust pipe and the crushing chamber. A collecting pipe is installed in the lower exhaust pipe, and a downhill surface is provided at the top of the collecting pipe;

[0006] A driving component is installed on the side wall of the lower exhaust pipe, and the driving component is used to drive the collecting pipe to move vertically;

[0007] A valve component is installed at the top of the collecting pipe, and the valve component is used to control the opening and closing of the top of the collecting pipe;

[0008] A collection cylinder is installed at the bottom end of the lower exhaust pipe, and a weighing assembly is installed inside the collection cylinder. The weighing assembly is used to receive and weigh the materials falling along the lower exhaust pipe;

[0009] When the crushing chamber operates, the air flow is discharged through the upper exhaust pipe. The valve assembly and the driving assembly operate. The valve assembly forces the top end of the lower exhaust pipe to open, and the driving assembly drives the collection pipe to move upward, so that the downhill surface at the top end of the collection pipe is close to the uphill surface, thereby increasing the suction force at the end of the upper exhaust pipe. After the materials in the crushing chamber are sucked into the upper exhaust pipe, they then fall along the lower exhaust pipe. The weighing assembly operates to receive and weigh the materials.

[0010] Preferably, threaded holes and guiding holes are provided on the bottom wall of the collection pipe. The driving assembly includes a driving motor, a vertical screw rod, and a vertical guiding rod. The driving motor is fixed on the outer wall of the lower exhaust pipe. The output shaft of the driving motor penetrates into the interior of the exhaust pipe and is fixed with a first bevel gear. The vertical screw rod is installed on the inner side wall of the lower exhaust pipe through a first bearing seat. The top end of the vertical screw rod extends into the threaded hole and is threadedly connected with the threaded hole. The bottom end of the vertical screw rod is fixed with a second bevel gear. The second bevel gear meshes with the first bevel gear. The top end of the vertical guiding rod is movably inserted into the guiding hole. The bottom end of the vertical guiding rod is fixed with a connecting block, and the connecting block is fixedly connected with the inner wall of the lower exhaust pipe.

[0011] Preferably, an assembly hole is further provided on the bottom wall of the collection pipe. The valve assembly includes a valve plate installed inside the collection pipe and a transmission assembly installed in the assembly hole. The valve plate is rotatably connected to the inner wall of the collection pipe through a valve shaft. The transmission assembly uses the movement of the collection pipe itself to drive the valve plate to rotate.

[0012] Preferably, the transmission assembly includes an incomplete rack, a horizontal shaft, an upper synchronous pulley, and a lower synchronous pulley. The horizontal shaft is rotatably connected to the inner wall of the assembly hole. A transmission gear is fixed on the horizontal shaft. The top end of the incomplete rack extends into the assembly hole and meshes with the transmission gear. The incomplete rack is also vertically slidably connected to the inner wall of the assembly hole. The bottom end of the incomplete rack extends outside the assembly hole and is fixed with a base block. The base block is fixedly connected with the inner wall of the lower exhaust pipe. The lower synchronous pulley is fixed on the horizontal shaft. The upper synchronous pulley is fixed on the valve shaft. A synchronous belt is connected between the upper synchronous pulley and the lower synchronous pulley.

[0013] Preferably, the weighing assembly includes a horizontal bracket installed inside the collection cylinder. A pressure sensor is fixed on the top of the horizontal bracket. A cross bracket is fixed on the bearing surface of the pressure sensor. A tray is arranged above the cross bracket. The tray is arranged directly below the collection pipe. The tray is used to collect the materials falling along the collection pipe. A spring is fixedly connected between the tray and the cross bracket.

[0014] Preferably, base shafts are fixed to both sides of the horizontal bracket. The base shafts are rotatably connected to the inner wall of the collection cylinder. A regulating motor is fixedly connected to the outer wall of the collection cylinder. The output shaft of the regulating motor is fixedly connected to the base shaft. The regulating motor is used to drive the tray to flip, so as to clean the materials on the tray.

[0015] Preferably, a vibration assembly is further installed on the horizontal bracket. The vibration assembly is used to shake off the materials adhered to the tray when the tray flips.

[0016] Preferably, the vibration assembly includes a driving motor, a sleeve and a transmission shaft. The sleeve is rotatably connected to the base shaft. A driven gear and a cam are fixed on the sleeve. The cam matches the position of the tray. The driving motor is fixed to the bottom of the horizontal bracket. The output shaft of the driving motor is fixedly connected with a third bevel gear. The transmission shaft is installed at the bottom of the horizontal bracket through a second bearing seat. A fourth bevel gear is fixed to one end of the transmission shaft. The fourth bevel gear meshes with the third bevel gear. A driving gear is fixed to the other end of the transmission shaft. The driving gear meshes with the driven gear.

[0017] Preferably, the bottom end of the collection cylinder is funnel-shaped. A screw conveyor is fixedly installed at the bottom end of the collection cylinder. A Venturi tube is fixed to the end of the screw conveyor. A front branch pipe is fixed to the feeding pipe. The front branch pipe is fixedly connected to the air inlet end of the Venturi tube. A rear branch pipe is fixed to the exhaust end of the Venturi tube. One end of the rear branch pipe is fixedly connected to the feeding pipe. The connection point of the rear branch pipe and the feeding pipe is arranged on the side close to the pulverizing chamber of the connection point of the front branch pipe and the feeding pipe.

[0018] The present invention also discloses a preparation method of a porous carbon material. This preparation method of the porous carbon material uses the above-mentioned air ultrafine pulverizer.

[0019] Compared with the prior art, the present invention provides an air ultrafine pulverizer and a preparation method of a porous carbon material, having the following beneficial effects:

[0020] 1. For this air ultrafine pulverizer and the preparation method of the porous carbon material, by installing a collection pipe, a driving assembly, a valve assembly and a weighing assembly on the pulverizing chamber, the material amount in the pulverizing chamber is detected regularly during the pulverizing process. During the detection, mainly by increasing the discharging suction force, a part of the materials are sucked out, and this part of the materials are collected and weighed. The material amount in the pulverizing chamber is reflected by the material amount collected per unit time. Finally, the feeding amount of the pulverizer is controlled according to the material amount. This method can avoid too much or too little material amount inside the pulverizer, keep the material amount within a suitable threshold, ensure the pulverizing efficiency of the pulverizer, and when the material amount in the pulverizing chamber is too large, the driving assembly and the valve assembly can also accelerate the discharge of the materials in the pulverizing chamber, which is more efficient than only regulating the feeding amount.

[0021] 2. This air ultra-fine pulverizer and the preparation method of porous carbon materials can pour out the materials in the tray by starting the adjustment motor after each weighing by setting the adjustment motor and the vibration assembly, avoiding the retention of materials in the tray and affecting the accuracy of the next weighing. Moreover, the vibration assembly also vibrates the inverted tray, making the material cleaning cleaner.

[0022] 3. This air ultra-fine pulverizer and the preparation method of porous carbon materials can re-inhale the materials collected in the collection cylinder into the pulverizing chamber by setting the screw conveyor, the front branch pipe, the Venturi tube and the rear branch pipe, facilitating recycling and re-pulverization, with high automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the three-dimensional structure of an air ultra-fine pulverizer of the present invention Figure 1 ;

[0024] Figure 2 Schematic diagram of the three-dimensional structure of an air ultra-fine pulverizer of the present invention Figure 2 ;

[0025] Figure 3 Schematic diagram of the connection structure of the pulverizing chamber of the present invention;

[0026] Figure 4 Cross-sectional view of the pulverizing chamber of the present invention;

[0027] Figure 5 Cross-sectional view of the working state of the drive assembly of the present invention;

[0028] Figure 6 Of the present invention Figure 5 Enlarged view of part A;

[0029] Figure 7 Of the present invention Figure 5 Enlarged view of part B;

[0030] Figure 8 Partial cross-sectional view of the collection pipe of the present invention;

[0031] Figure 9 Of the present invention Figure 8 Enlarged view of part C;

[0032] Figure 10 Cross-sectional view of the collection cylinder of the present invention;

[0033] Figure 11 Schematic diagram of the working state of the vibration assembly of the present invention;

[0034] Figure 12 Of the present invention Figure 11 Enlarged view of part D.

[0035] In the figure: 1, frame; 2, crushing chamber; 21, upper exhaust pipe; 211, uphill surface; 22, lower exhaust pipe; 3, feeding system assembly; 4, feeding pipe; 5, gas transmission pipe; 6, collecting pipe; 61, downhill surface; 62, assembly hole; 7, driving assembly; 71, driving motor; 72, vertical screw rod; 73, vertical guide rod; 74, first bevel gear; 75, first bearing seat; 76, second bevel gear; 77, connecting block; 8, valve assembly; 81, valve plate; 82, transmission assembly; 821, incomplete rack; 822, horizontal shaft; 823, upper synchronous pulley; 824, lower synchronous pulley; 825, transmission gear; 826, base block; 827, synchronous belt; 83, valve shaft; 9, weighing assembly; 91, horizontal bracket; 92, pressure sensor; 93, cross bracket; 94, tray; 95, spring; 96, base shaft; 97, adjusting motor; 98, vibration assembly; 981, transmission motor; 982, sleeve; 983, transmission shaft; 984, driven gear; 985, cam; 986, third bevel gear; 987, driving gear; 988, fourth bevel gear; 989, second bearing seat; 10, collecting cylinder; 11, screw conveyor; 12, Venturi tube; 13, front branch pipe; 14, rear branch pipe. Specific implementation mode

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] As introduced in the background art, there are deficiencies in the prior art. To solve the above technical problems, the present application proposes an air ultrafine pulverizer and a method for preparing porous carbon materials.

[0038] Embodiment 1: Please refer to Figures 1 - 7 , an air ultrafine pulverizer, including a frame 1, a crushing chamber 2, a feeding system assembly 3, a feeding pipe 4, and a gas transmission pipe 5 installed on the frame 1. The crushing chamber 2 is fixed with an upper exhaust pipe 21 and a lower exhaust pipe 22 at corresponding positions. An uphill surface 211 is provided at the connection between the upper exhaust pipe 21 and the crushing chamber 2. A collecting pipe 6 is installed in the lower exhaust pipe 22. A downhill surface 61 is provided at the top of the collecting pipe 6;

[0039] A driving assembly 7 is installed on the side wall of the lower exhaust pipe 22. The driving assembly 7 is used to drive the collecting pipe 6 to move vertically;

[0040] A valve assembly 8 is installed at the top of the collecting pipe 6. The valve assembly 8 is used to control the opening and closing of the top of the collecting pipe 6;

[0041] A collection cylinder 10 is installed at the bottom end of the lower exhaust pipe 22, and a weighing assembly 9 is installed inside the collection cylinder 10. The weighing assembly 9 is used to receive and weigh the materials falling along the lower exhaust pipe 22.

[0042] When the crushing chamber 2 is operating, the air flow is discharged through the upper exhaust pipe 21, the valve assembly 8 and the driving assembly 7 are operating. The valve assembly 8 forces the top end of the lower exhaust pipe 22 to open, and the driving assembly 7 drives the collection pipe 6 to move upward, so that the downhill surface 61 at the top end of the collection pipe 6 is close to the uphill surface 211, thereby increasing the suction force at the end of the upper exhaust pipe 21. After the materials in the crushing chamber 2 are sucked into the upper exhaust pipe 21, they then fall along the lower exhaust pipe 22, and the weighing assembly 9 operates to receive and weigh the materials.

[0043] Among them, the structures of the feeding system assembly 3, the crushing chamber 2, the feeding pipe 4, and the air delivery pipe 5 are all prior arts. The feeding system assembly 3 is used to store and output raw materials. The feeding pipe 4 is used to input the raw materials into the crushing chamber 2. The feeding pipe 4 and the air delivery pipe 5 are both connected to the crushing chamber 2. The feeding pipe 4 and the air delivery pipe 5 are both connected to an air compressor and have high-speed air flow inside. The upper exhaust pipe 21 is used to collect the crushed materials that meet the particle size requirements. The outer diameter of the collection pipe 6 matches the inner diameter of the lower exhaust pipe 22.

[0044] During use, the crushing chamber operates to crush the internal materials. The materials meeting the particle size are discharged through the upper exhaust pipe 21. During the crushing operation, the material quantity in the crushing chamber 2 is detected at regular intervals. The specific detection work is as follows: Start the driving assembly 7 and the valve assembly 8. When the valve assembly 8 operates, the top end of the originally closed collecting pipe 6 is opened. When the driving assembly 7 operates, it drives the collecting pipe 6 to move vertically upward first, and finally makes the downhill surface 61 at the top end of the collecting pipe 6 close to the uphill surface 211. A discharge gap is formed between the uphill surface 211 and the downhill surface 61. The discharge gap is smaller than the exhaust cross-section of the previous upper exhaust pipe 21, which increases the wind speed and suction here. As a result, the materials inside the crushing chamber 2 are sucked into the upper exhaust pipe. The suction in the upper exhaust pipe becomes smaller, causing the materials entering the upper exhaust pipe to fall under the action of gravity, then pass through the collecting pipe 6, and finally fall downward along the inner cavity of the lower exhaust pipe. After a period of time, start the driving assembly 7 and the valve assembly 8 again. The valve assembly 8 controls the top end of the collecting pipe 6 to close, and the driving assembly 7 then drives the collecting pipe 6 to move downward and reset. Then start the weighing assembly 9. The weighing assembly 9 receives the previously fallen materials and weighs them to determine the materials collected under the same suction per unit time. When the material weight is large, it can reflect that the material base in the crushing chamber 2 is large. When the weight is small, it reflects that the material base in the crushing chamber 2 is small. When the weight is within the specified range, it means that the material base in the crushing chamber 2 is moderate and can achieve the best stirring efficiency. When the material quantity in the crushing chamber 2 is too small, the feed quantity can be increased. When the material quantity in the crushing chamber 2 is too large, start the driving assembly 7 and the valve assembly 8 to suck out some of the materials in the crushing chamber 2, quickly reduce the base, and the feed quantity can also be adjusted downward to achieve regulation;

[0045] By installing the collecting pipe 6, the driving assembly 7, the valve assembly 8, and the weighing assembly 9 on the crushing chamber 2, the material quantity in the crushing chamber 2 is detected regularly during the crushing process. During the detection, mainly a part of the materials are sucked out by increasing the discharge suction, and this part of the materials is collected and weighed. The material quantity base in the crushing chamber 2 is reflected by the material quantity collected per unit time. Finally, the feed quantity of the mill is controlled according to the material quantity. This method can avoid too much or too little material quantity inside the mill, keep the material quantity within an appropriate threshold, ensure the crushing efficiency of the mill, and when the material quantity in the crushing chamber 2 is too large, the driving assembly 7 and the valve assembly 8 can also accelerate the discharge of the materials in the crushing chamber 2, which is more efficient than only regulating the feed quantity.

[0046] Embodiment 2: Refer to Figures 4 - 9, different from the above embodiments, a threaded hole and a guiding hole are provided on the bottom wall of the collecting pipe 6. The driving assembly 7 includes a driving motor 71, a vertical screw rod 72 and a vertical guiding rod 73. The driving motor 71 is fixed on the outer wall of the lower exhaust pipe 22. The output shaft of the driving motor 71 penetrates into the exhaust pipe and is fixed with a first bevel gear 74. The vertical screw rod 72 is installed on the inner side wall of the lower exhaust pipe 22 through a first bearing seat 75. The top end of the vertical screw rod 72 extends into the threaded hole and is threadedly connected with the threaded hole. The bottom end of the vertical screw rod 72 is fixed with a second bevel gear 76. The second bevel gear 76 meshes with the first bevel gear 74. The top end of the vertical guiding rod 73 is movably inserted into the guiding hole. The bottom end of the vertical guiding rod 73 is fixed with a connecting block 77. The connecting block 77 is fixedly connected with the inner wall of the lower exhaust pipe 22.

[0047] Among them, the guiding hole, the vertical guiding rod 73 and the connecting block 77 are all provided in two groups and are distributed in an annular array. The threaded hole, the vertical screw rod 72, the vertical guiding rod 73 and the guiding hole are all vertically arranged. During use, the driving motor 71 is started. After the driving motor 71 operates, it drives the first bevel gear 74 to rotate. When the first bevel gear 74 rotates, it drives the second bevel gear 76 to rotate. When the second bevel gear 76 rotates, it drives the vertical screw rod 72 to rotate. When the vertical screw rod 72 rotates, it drives the collecting pipe 6 to move vertically upward. When the driving motor 71 drives the second bevel gear 76 to rotate in the reverse direction, it drives the collecting pipe 6 to move vertically downward. After the collecting pipe 6 moves vertically upward, the downhill surface 61 at the top end of the collecting pipe 6 moves to be close to the uphill surface 211. At this time, the material can only be discharged through the gap between the uphill surface 211 and the downhill surface 61. Since the wind speed in the gap is faster than before and the wind pressure is also greater, materials of different particle sizes in the pulverizing chamber 2 can be sucked into the upper exhaust duct.

[0048] By providing the driving motor 71, the driving motor 71 can drive the collecting pipe 6 to move vertically after operation, which is beneficial to accurately adjusting the height of the collecting pipe 6, and then adjusting the gap between the downhill surface 61 and the uphill surface 211, so that the suction force at the bottom end of the upper exhaust duct increases, facilitating the collection of the materials inside the pulverizing chamber 2.

[0049] Embodiment 3, refer to Figure 7 Figure 9, Different from the above embodiments, an assembly hole 62 is further formed in the bottom wall of the collecting pipe 6. The valve assembly 8 includes a valve plate 81 installed inside the collecting pipe 6 and a transmission assembly 82 installed in the assembly hole 62. The valve plate 81 is rotatably connected to the inner wall of the collecting pipe 6 through a valve shaft 83. The transmission assembly 82 uses the movement of the collecting pipe 6 itself to drive the valve plate 81 to rotate. The transmission assembly 82 includes an incomplete rack 821, a horizontal shaft 822, an upper synchronous pulley 823, and a lower synchronous pulley 824. The horizontal shaft 822 is rotatably connected to the inner wall of the assembly hole 62. A transmission gear 825 is fixed on the horizontal shaft 822. The top end of the incomplete rack 821 extends into the assembly hole 62 and meshes with the transmission gear 825. The incomplete rack 821 is also vertically slidably connected to the inner wall of the assembly hole 62. The bottom end of the incomplete rack 821 extends outside the assembly hole 62 and is fixed with a base block 826. The base block 826 is fixedly connected to the inner wall of the lower exhaust pipe 22. The lower synchronous pulley 824 is fixed on the horizontal shaft 822. The upper synchronous pulley 823 is fixed on the valve shaft 83. A synchronous belt 827 is connected between the upper synchronous pulley 823 and the lower synchronous pulley 824;

[0050] Among them, the valve plate 81 is arranged inside the top end of the collecting pipe 6. During use, when the collecting pipe 6 moves vertically upward, a relative displacement occurs between the transmission gear 825 and the rack. At this time, the transmission rack rolls along the rack, thereby driving the horizontal shaft 822 to rotate. When the horizontal shaft 822 rotates, it drives the lower synchronous pulley 824 to rotate. When the lower synchronous pulley 824 rotates, it drives the upper synchronous pulley 823 to rotate through the synchronous belt 827. When the upper synchronous pulley 823 rotates, it drives the valve shaft 83 to rotate. When the valve shaft 83 rotates, it drives the valve plate 81 to flip, and finally the valve plate 81 rotates to a vertical state, opening the top end of the collecting pipe 6. When the collecting pipe 6 moves vertically downward, the transmission gear 825 rotates in the reverse direction, turning the valve plate 81 to a horizontal state and closing the top end of the collecting pipe 6;

[0051] By setting the valve assembly 8 as the transmission assembly 82 and the valve plate 81, when the collecting pipe 6 moves vertically, the valve plate 81 can be driven to rotate through the transmission assembly 82, so as to achieve opening and closing. This valve assembly 8 does not occupy the space outside the top end of the collecting pipe 6, does not affect the vertical movement of the collecting pipe 6, and does not require additional power.

[0052] Embodiment 4, refer to Figure 10 and Figure 11 , Different from the above embodiments, the weighing assembly 9 includes a horizontal bracket 91 installed inside the collecting cylinder 10. A pressure sensor 92 is fixed on the top of the horizontal bracket 91. A cross bracket 93 is fixed on the pressure-bearing surface of the pressure sensor 92. A tray 94 is arranged above the cross bracket 93. The tray 94 is arranged directly below the collecting pipe 6. The tray 94 is used to collect the materials falling along the collecting pipe 6. A spring 95 is fixedly connected between the tray 94 and the cross bracket 93.

[0053] Among them, the tray 94 is located directly below the collecting pipe 6. The diameter of the tray 94 is larger than that of the collecting pipe 6. The materials in the collecting pipe 6 fall directly onto the tray 94, and the pressure sensor 92 monitors the weight change to achieve weighing. By setting the weighing assembly 9 as the tray 94 and the pressure sensor 92 installed inside the collecting cylinder 10, after the tray 94 receives the materials, the weight is monitored by the pressure sensor 92, which facilitates the rapid weighing of the materials.

[0054] Embodiment 5, refer to Figures 10 - 12 , different from the above embodiment, base shafts 96 are fixed on both sides of the horizontal bracket 91. The base shafts 96 are rotatably connected to the inner wall of the collecting cylinder 10. The outer wall of the collecting cylinder 10 is fixedly connected with an adjusting motor 97. The output shaft of the adjusting motor 97 is fixedly connected with the base shaft 96. The adjusting motor 97 is used to drive the tray 94 to flip, so as to clean the materials in the tray 94. A vibration assembly 98 is also installed on the horizontal bracket 91. The vibration assembly 98 is used to shake off the materials adhering to the tray 94 when the tray 94 flips. The vibration assembly 98 includes a driving motor 981, a sleeve 982 and a transmission shaft 983. The sleeve 982 is rotatably connected to the base shaft 96. A driven gear 984 and a cam 985 are fixed on the sleeve 982. The cam 985 matches the position of the tray 94. The driving motor 981 is fixed at the bottom of the horizontal bracket 91. The output shaft of the driving motor 981 is fixedly connected with a third bevel gear 986. The transmission shaft 983 is installed at the bottom of the horizontal bracket 91 through a second bearing seat 989. A fourth bevel gear 988 is fixed at one end of the transmission shaft 983. The fourth bevel gear 988 meshes with the third bevel gear 986. A driving gear 987 is fixed at the other end of the transmission shaft 983. The driving gear 987 meshes with the driven gear 984.

[0055] Among them, the sleeve 982 and the transmission shaft 983 are preferably set in two groups and are symmetrically distributed on both sides of the third bevel gear 986. Two second bearing seats 989 are preferably set on each transmission shaft 983;

[0056] During use, after each weighing by the weighing component 9, the material after the previous weighing needs to be emptied to avoid affecting subsequent weighing. The specific operation is as follows: Start the adjustment motor 97. When the adjustment motor 97 operates, it drives the base shaft 96 to rotate. When the base shaft 96 rotates, it drives the horizontal bracket 91 to flip 180 degrees, and then the tray 94 flips 180 degrees to empty the material in the tray 94. The material falls to the bottom of the collection cylinder 10. Subsequently, start the transmission motor 981. When the transmission motor 981 operates, the third bevel gear 986 rotates. When the third bevel gear 986 rotates, it drives the fourth bevel gear 988 to rotate. When the fourth bevel gear 988 rotates, it drives the transmission shaft 983 to rotate. When the transmission shaft 983 rotates, it drives the driving gear 987 to rotate. When the driving gear 987 rotates, the driven gear 984 rotates. When the driven gear 984 rotates, it drives the sleeve 982 to rotate. The cam 985 on the sleeve 982 also rotates accordingly. During the rotation of the cam 985, it intermittently pushes the inverted tray 94, and the tray 94 is reset under the action of the spring 95, thereby achieving a high-frequency vibration effect. The vibration of the tray 94 causes the material adhering to the inner wall of the tray 94 to fall off;

[0057] By setting the adjustment motor 97 and the vibration component 98, starting the adjustment motor 97 after each weighing can empty the material in the tray 94, avoiding the material staying in the tray 94 and affecting the accuracy of the next weighing. Moreover, the vibration component 98 also makes the inverted tray 94 vibrate, making the material cleaning cleaner.

[0058] Embodiment Six. Refer to Figure 3 , different from the above embodiment, the bottom end of the collection cylinder 10 is funnel-shaped. A screw conveyor 11 is fixedly installed at the bottom end of the collection cylinder 10. A Venturi tube 12 is fixed at the end of the screw conveyor 11. A front branch pipe 13 is fixed on the feeding pipe 4. The front branch pipe 13 is fixedly connected to the air inlet end of the Venturi tube 12. The exhaust end of the Venturi tube 12 is fixed with a rear branch pipe 14. One end of the rear branch pipe 14 is fixedly connected to the feeding pipe 4. The connection point of the rear branch pipe 14 and the feeding pipe 4 is set on the side of the connection point of the front branch pipe 13 and the feeding pipe 4 close to the crushing chamber 2.

[0059] Among them, a first valve is provided at one end of the front branch pipe 13 close to the connection point of the front branch pipe 13 and the feeding pipe 4. A second valve is provided at one end of the feeding pipe 4 close to the connection point of the front branch pipe 13 and the feeding pipe 4. A third valve is provided at one end of the rear branch pipe 14 close to the connection point of the rear branch pipe 14 and the feeding pipe 4. A fourth valve is provided at a section of the feeding pipe 4 close to the connection point of the rear branch pipe 14 and the feeding pipe 4. In the initial state, the first valve and the third valve are closed, and the second valve and the fourth valve are open;

[0060] In use, when a certain amount of material is collected inside the collection cylinder 10, start the screw conveyor 11 to discharge the material. Open the first valve and the third valve, and close the second valve and the fourth valve. At this time, the airflow in the feeding pipe 4 changes its flow direction, first passes through the front branch pipe 13, the Venturi tube 12, and the rear branch pipe 14 in sequence, and finally returns to the feeding pipe 4. When the airflow passes through the Venturi tube 12, suction is generated to suck out the material output by the screw conveyor 11, and then it is discharged back into the pulverizing chamber 2 along with the airflow;

[0061] By setting the screw conveyor 11, the front branch pipe 13, the Venturi tube 12, and the rear branch pipe 14, the material collected in the collection cylinder 10 can be re-sucked into the pulverizing chamber 2, which facilitates recycling and re-pulverization and has a high degree of automation.

[0062] Example Six: A method for preparing a porous carbon material, including: First, form the raw materials starch, powdered carbon, and cellulose through a forming and drying process section, and then prepare biomass hard carbon and porous carbon materials through high-temperature treatment and steam activation. Subsequently, after washing and drying the biomass hard carbon and porous carbon materials, grind them with an air ultrafine mill in one of the above examples to form the final product, the porous carbon material.

[0063] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An air ultrafine grinding machine, comprising a frame, a grinding chamber mounted on the frame, a feeding system assembly, a feeding pipe, and an air delivery pipe, characterized in that: An upper exhaust pipe and a lower exhaust pipe corresponding to the position are fixed on the crushing chamber, an upslope surface is arranged at the connection between the upper exhaust pipe and the crushing chamber, a collecting pipe is installed in the lower exhaust pipe, and a downslope surface is arranged at the top of the collecting pipe; The side wall of the lower exhaust pipe is equipped with a driving assembly, and the driving assembly is used to drive the collecting pipe to move vertically; A valve assembly is installed at the top of the collecting pipe, and the valve assembly is used to control the opening and closing of the top of the collecting pipe; A collecting cylinder is installed at the bottom end of the lower exhaust pipe, and a weighing assembly is installed in the collecting cylinder, and the weighing assembly is used to receive and weigh the materials falling along the lower exhaust pipe; When the crushing chamber is operating, the air flow is discharged through the upper exhaust pipe, the valve assembly and the drive assembly operate, the valve assembly forces the top of the lower exhaust pipe to open, and the drive assembly drives the collecting pipe to move upward, so that the downslope surface of the top of the collecting pipe is close to the upslope surface, thereby increasing the suction force at the end of the upper exhaust pipe. The material in the crushing chamber is sucked into the upper exhaust pipe and then falls along the lower exhaust pipe. The weighing assembly operates to receive and weigh the material.

2. An air ultrafine grinding machine according to claim 1, characterized in that: The bottom wall of the collecting pipe is provided with a threaded hole and a guide hole, the driving assembly includes a driving motor, a vertical screw and a vertical guide rod, the driving motor is fixed on the outer wall of the lower exhaust pipe, the output shaft of the driving motor passes through the inside of the exhaust pipe and is fixed with a first bevel gear, the vertical screw is installed on the inner wall of the lower exhaust pipe through a first bearing seat, the top end of the vertical screw extends into the threaded hole and is threadedly connected with the threaded hole, the bottom end of the vertical screw is fixed with a second bevel gear, the second bevel gear is meshed with the first bevel gear, the top end of the vertical guide rod is movably inserted into the guide hole, the bottom end of the vertical guide rod is fixed with a connecting block, and the connecting block is fixedly connected to the inner wall of the lower exhaust pipe.

3. The air ultrafine grinding machine according to claim 1, characterized in that: The bottom wall of the collecting tube is also provided with an assembly hole. The valve assembly includes a valve plate installed inside the collecting tube and a transmission assembly installed in the assembly hole. The valve plate is rotatably connected to the inner wall of the collecting tube via a valve shaft. The transmission assembly utilizes the movement of the collecting tube itself to drive the valve plate to rotate.

4. An air ultrafine grinding machine according to claim 3, characterized in that: The transmission assembly includes an incomplete rack, a transverse shaft, an upper synchronous wheel and a lower synchronous wheel. The transverse shaft is rotatably connected to the inner wall of the assembly hole, a transmission gear is fixed on the transverse shaft, the top end of the incomplete rack extends into the assembly hole and meshes with the transmission gear, the incomplete rack is also vertically slidably connected to the inner wall of the assembly hole, the bottom end of the incomplete rack extends to the outside of the assembly hole and is fixed with a base block, the base block is fixedly connected to the inner wall of the lower exhaust pipe, the lower synchronous wheel is fixed on the transverse shaft, the upper synchronous wheel is fixed on the valve shaft, and a synchronous belt is connected between the upper and lower synchronous wheels.

5. The air ultrafine grinding machine according to claim 1, characterized in that: The weighing assembly includes a horizontal bracket installed inside the collecting tube, a pressure sensor is fixed on the top of the horizontal bracket, a cross bracket is fixed on the pressure-bearing surface of the pressure sensor, a tray is arranged above the cross bracket, the tray is arranged directly below the collecting tube, the tray is used to collect materials falling along the collecting tube, and a spring is fixedly connected between the tray and the cross bracket.

6. The air ultrafine grinding machine according to claim 1, characterized in that: Base shafts are fixed on both sides of the horizontal bracket, and the base shafts are rotatably connected to the inner wall of the collecting cylinder. An adjusting motor is fixedly connected to the outer wall of the collecting cylinder, and the output shaft of the adjusting motor is fixedly connected to the base shaft. The adjusting motor is used to drive the tray to flip, so as to clean the materials in the tray.

7. An air ultrafine grinding machine according to claim 6, characterized in that: A vibration component is also installed on the horizontal bracket, and the vibration component is used to shake off the materials adhered to the pallet when the pallet is turned over.

8. An air ultrafine grinding machine according to claim 7, characterized in that: The vibration assembly includes a transmission motor, a sleeve and a transmission shaft. The sleeve is rotatably connected to the base shaft. A driven gear and a cam are fixed on the sleeve. The cam matches the position of the tray. The transmission motor is fixed to the bottom of the horizontal bracket. The output shaft of the transmission motor is fixedly connected to the third bevel gear. The transmission shaft is installed at the bottom of the horizontal bracket through a second bearing seat. A fourth bevel gear is fixed to one end of the transmission shaft. The fourth bevel gear is meshed with the third bevel gear. The other end of the transmission shaft is fixedly connected to a driving gear. The driving gear is meshed with the driven gear.

9. An air ultrafine grinding machine according to claim 8, characterized in that: A funnel shape is provided at the bottom end of the collecting barrel, a screw conveyor is fixedly installed at the bottom end of the collecting barrel, a Venturi tube is fixed at the end of the screw conveyor, a front branch pipe is fixed on the feeding pipe, the front branch pipe is fixedly connected to the air inlet end of the Venturi tube, a rear branch pipe is fixed at the exhaust end of the Venturi tube, one end of the rear branch pipe is fixedly connected to the feeding pipe, and the connection point of the rear branch pipe and the feeding pipe is arranged at the connection point of the front branch pipe and the feeding pipe close to the side of the crushing chamber.

10. A method for preparing a porous carbon material, characterized in that: The method for preparing porous carbon material uses an air ultrafine grinding machine as described in any one of claims 1-9.

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