Self-priming feeding nano-level sand mill

Abstract

This invention relates to the technical field of sand mills and discloses a self-priming feeding nanoscale sand mill. The sand mill includes a mill body, a feeding hopper located on the mill body, multiple distributing units evenly arranged on the feeding hopper for transporting grinding balls of different sizes into the feeding hopper, a protective cover installed in the feeding hopper, and a premixing unit located within the protective cover. Through the premixing unit, the colloid and grinding balls are sequentially placed in the mixing chamber, and then a cam swings back and forth to mix the colloid and grinding balls, thereby increasing the surface wettability of the grinding balls and ensuring their even distribution within the colloid, thus reducing damage to the grinding balls and completing the material grinding process.

Description

Technical Field

[0001] This invention relates to the technical field of sand mills, specifically a self-priming feeding nanoscale sand mill. Background Technology

[0002] Nanoscale sand mills use high-speed rotors to drive ultrafine grinding media to impact, shear, and grind materials, refining particles to 10-100 nm with uniform particle size distribution. Wet grinding, which uses liquid as a dispersion medium, mixes with powder to form a slurry before grinding, effectively suppressing dust, improving dispersibility, and preventing particle agglomeration. It is easier to stably obtain nanoscale fineness and is the mainstream process for nanoscale sand mills.

[0003] For example, Chinese Patent CN117960316B discloses a multi-stage grinding nanoscale sand mill and its grinding method, including a main shaft, a stirring and fixing part, a telescopic component, and a stirring and moving part. Before grinding the raw material, the distance between each stirring and moving part and its corresponding stirring and fixing part can be adjusted in advance by the telescopic component, thereby changing the width of each grinding tank to match the particle size target of different types of raw materials. At the same time, if the width of the grinding tank increases after long-term operation of the multi-stage grinding nanoscale sand mill, the stirring and moving part can be extended by the telescopic component to compensate for the width of the grinding tank, so that the particle size target of the raw material can still be met after long-term operation.

[0004] However, when the above sand mill is working, balls are added directly to the grinding chamber before liquid is introduced. In the initial stage, the ball bed is not moistened and is partially suspended. As a result, during the grinding process, the grinding balls may chip or break. Furthermore, the direct introduction of dry balls into the chamber can easily trap air, forming airlocks and causing localized idling, which can damage the grinding balls or the sand mill itself, leading to the failure of the grinding process.

[0005] Therefore, how to complete the grinding of materials is a problem that needs to be solved. Summary of the Invention

[0006] This invention provides a self-priming feeding nanoscale sand mill to solve the above-mentioned problems existing in the prior art.

[0007] Self-priming feeding nanoscale sand mill, including:

[0008] The sand mill body includes a feed hopper located on the sand mill body, multiple material distribution units evenly arranged on the feed hopper for transporting grinding balls of different sizes into the feed hopper, a protective cover installed in the feed hopper, and a premixing unit located inside the protective cover.

[0009] The premixing unit includes a mounting base fixedly installed on the feed hopper, a mixing chamber opened on the mounting base, a stirring wheel located in the mixing chamber, a stirring motor connected to the stirring wheel, a medium conveying channel located on the mounting base for connecting the mixing chamber and the feed hopper, a conveying part connected to the mixing chamber for conveying colloid and nitrogen, and a stirring motor provided on the mounting base and connected to the stirring wheel.

[0010] The grinding chamber of the sand mill is equipped with an exhaust port, and the stirring wheel is a cam. By making the cam swing back and forth, the colloid in the mixing chamber is mixed with the grinding balls.

[0011] Furthermore, the conveying section includes a conveying cavity formed within the mounting base and communicating with the mixing cavity, a partition seat located in the conveying cavity, and two conveying pipes symmetrically arranged on the mounting base;

[0012] The partition is an inverted T-shaped mechanism that divides the conveying chamber into two areas: the first chamber is connected to the mixing chamber, and the other is the second chamber.

[0013] Furthermore, a connecting block is screwed onto the partition seat, a connecting seat is disposed on the mounting seat, a cross-shaped driven rod is located in the first chamber, and a return spring is sleeved on the driven rod and connected to the partition seat;

[0014] The end of the separator near the mixing chamber is an expanded diameter end, wherein the minimum radius of the expanded diameter end is smaller than the minimum radius of the driven rod shoulder;

[0015] The connecting seat has a reserved area; the connecting block is provided with a connecting channel that communicates with the area and the first chamber;

[0016] The partition seat is provided with a plurality of oblique holes that communicate with the second chamber and the region.

[0017] Furthermore, the material distribution unit includes a base connected to the feeding hopper, a discharge hopper disposed on the base, a transport pipe connected to the discharge hopper, a first hopper and a second hopper disposed on the base, a communication port for connecting the first hopper and the second hopper, and a loading component disposed in the first hopper for transporting grinding balls.

[0018] The transport pipe is used to transport grinding balls into the first hopper;

[0019] The second hopper is connected to the feed hopper.

[0020] Furthermore, the feeding component includes a feeding motor fixedly connected to the base, a rotating shaft connected to the output end of the feeding motor and passing through the first and second hoppers in sequence, a rotating disk sleeved on the rotating shaft, a plurality of rotating rods evenly arranged on the rotating disk, and an elastic sheet arranged at the free end of the rotating rod.

[0021] Furthermore, the length direction of the elastic sheet has a preset angle with the axial direction of the rotating rod;

[0022] The elastic sheet is divided into a straight section and a curved section. The curved section has a C-shaped structure and its free end is close to the inner wall of the first hopper with a connecting opening.

[0023] The elasticity of the elastic sheet and the bending section work together to position the grinding balls between the bending section and the second hopper. The rotation of the rotating disk allows the grinding balls to enter the second hopper sequentially.

[0024] Furthermore, the connecting seat is also provided with a gas supply component, which is used to supply nitrogen gas with a preset temperature into the area;

[0025] The gas delivery assembly includes a gas delivery seat connected to the connecting seat, an air injection port disposed on the gas delivery seat and communicating with the area, a first air inlet and a second air inlet disposed on the gas delivery seat, a second gas delivery channel for connecting the second air inlet and the air injection port, a transfer component disposed in the gas delivery seat, and a first gas delivery channel for connecting the first air inlet and the transfer component.

[0026] Furthermore, the transfer component includes a cylinder fixedly installed on the air supply seat, a sealing seat connected to the output end of the cylinder, a limiting seat located in the connecting seat, a distribution plate located in the limiting seat, an air intake channel opened on the limiting seat, and a sealing block provided at the output end of the cylinder.

[0027] The air intake channel consists of two channels with different diameters, and the sealing block is used to block the smaller diameter channel to cut off the gas.

[0028] The distribution plate has multiple circumferential connecting holes.

[0029] Furthermore, the sand mill is also equipped with a defoaming unit, which is installed on the grinding chamber of the sand mill;

[0030] The defoaming unit includes a connecting pipe connected to the grinding chamber, a ring pipe sleeved on the connecting pipe, a pre-storage cavity reserved between the ring pipe and the connecting pipe, an adjustment part provided on the ring pipe, and a first guide pipe and a second guide pipe provided in the connecting pipe.

[0031] The diameters of the first and second guide tubes gradually decrease along the direction of airflow movement in the connecting tube, forming a frustum-shaped structure.

[0032] An exhaust chamber is provided between the first guide tube and the second guide tube, and a plurality of air holes are provided on the second guide tube.

[0033] Furthermore, the second guide tube is provided with a sealing plate, which extends toward the inner wall of the connecting tube and is connected to the connecting tube. A row of cavities is formed between the sealing plate, the outer wall of the second guide tube and the inner wall of the connecting tube. A third air inlet is opened on the connecting tube. An adjusting rod is provided on the ring tube and screwed to the ring tube. A sealing gasket is provided on the adjusting rod.

[0034] One of the third air inlets is used to connect the venting chamber and the pre-storage chamber; the sealing gasket is used to block the connection between one of the third air inlets and the pre-storage chamber;

[0035] The venting cavity is connected to the exhaust cavity through a vent.

[0036] Beneficial Effects: This invention discloses a self-priming feeding nanoscale sand mill. The device, through a premixing unit, sequentially places the colloid and grinding balls into the mixing chamber. A cam then oscillates back and forth, mixing the colloid and grinding balls, increasing the surface wettability of the grinding balls, and ensuring their uniform distribution within the colloid. This reduces wear on the grinding balls. Furthermore, the movement of the grinding balls within the colloid results in more uniform mechanical wear and a longer lifespan, preventing localized rapid temperature rises caused by dry grinding, and avoiding flash evaporation and foaming in water-based or low-boiling-point media. During mixing, the cam rotation allows for the addition of colloid. By closing one of the delivery pipes and activating the gas delivery component, nitrogen gas is supplied to the mixing chamber, allowing the mixed grinding balls and colloid to be injected into the grinding chamber. Simultaneously, through the first and second guide pipes, a variable-diameter structure, and a negative pressure pump connected to a third air inlet, gas adhering to the nanomaterials is released, preventing air bubbles from damaging the material. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of the self-priming feeding nanoscale sand mill of the present invention;

[0038] Figure 2 This is a schematic diagram of the material distribution unit structure of the present invention;

[0039] Figure 3 This is a schematic diagram of the premixed unit structure of the present invention;

[0040] Figure 4 This is a schematic diagram of the medium delivery channel structure of the present invention;

[0041] Figure 5 This is a schematic diagram of the gas delivery component structure of the present invention;

[0042] Figure 6 This is a schematic diagram of the distribution disk structure of the present invention;

[0043] Figure 7 This is a schematic diagram of the defoaming unit structure of the present invention;

[0044] Figure 8 This is a schematic diagram of the second guide tube structure of the present invention.

[0045] Reference numerals: 1. Sand mill; 2. Feed hopper; 3. Distributor unit; 31. Discharge hopper; 32. Conveyor pipe; 33. First hopper; 34. Second hopper; 35. Rotating shaft; 36. Rotary disc; 37. Rotating rod; 38. Elastic sheet; 39. Connecting port; 310. Base; 4. Protective cover; 5. Premixing unit; 51. Mounting seat; 52. Conveying pipe; 53. Divider seat; 54. Connecting block; 55. Connecting seat; 56. Air supply assembly; 561. Cylinder; 57. Driven rod; 58. Return spring; 59. Agitator wheel; 5 10. Medium conveying channel; 562. Sealing seat; 563. Limiting seat; 564. Distribution plate; 565. Sealing block; 566. Gas supply seat; 567. First gas supply channel; 568. Second gas supply channel; 569. First air inlet; 5610. Second air inlet; 5611. Gas injection port; 6. Defoaming unit; 61. Adjusting rod; 62. Connecting pipe; 63. First guide pipe; 64. Second guide pipe; 65. Exhaust chamber; 66. Sealing gasket; 67. Third air inlet; 68. Pre-storage chamber; 69. Ring pipe; 610. Sealing plate. Detailed Implementation

[0046] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0047] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0048] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0049] This invention discloses a self-priming feeding nanoscale sand mill, with reference to... Figures 1-8 ,include:

[0050] The mill body comprises a feed hopper 2 located on the mill body, multiple distributing units 3 evenly arranged on the feed hopper 2 for transporting grinding balls of different sizes into the feed hopper 2, a protective cover 4 installed in the feed hopper 2, and a premixing unit 5 located within the protective cover 4. The premixing unit 5 includes a mounting base 51 fixedly installed on the feed hopper 2, a mixing chamber opened on the mounting base 51, a stirring wheel 59 located in the mixing chamber, a stirring motor connected to the stirring wheel 59, a media conveying channel 510 located on the mounting base 51 for connecting the mixing chamber and the feed hopper 2, a conveying section connected to the mixing chamber for conveying colloids and nitrogen, and a component disposed on the mounting base 51 and connected to the stirring wheel 59. A stirring motor is used to sequentially place the colloid and grinding balls into the mixing chamber. A cam then oscillates back and forth, mixing the colloid and grinding balls, increasing the surface wettability of the grinding balls, and ensuring their even distribution within the colloid. This reduces damage to the grinding balls and promotes more uniform mechanical wear and a longer lifespan. It also prevents localized, rapid temperature rises caused by dry grinding, which can lead to flashing and foaming in water-based or low-boiling-point media. During mixing, the cam rotation allows for the addition of colloid. Closing one of the delivery pipes 52 and activating the gas delivery assembly 56 delivers nitrogen into the mixing chamber, allowing the mixed grinding balls and colloid to be injected into the grinding chamber.

[0051] The conveying unit includes a conveying cavity formed within the mounting base 51 and communicating with the mixing cavity, a partition seat 53 located within the conveying cavity, and two conveying pipes 52 symmetrically arranged on the mounting base 51. The partition seat 53 is an inverted T-shaped mechanism, dividing the conveying cavity into two regions: a first chamber communicating with the mixing cavity and a second chamber. A connecting block 54 is screwed onto the partition seat 53, along with a connecting seat 55 on the mounting base 51, a cross-shaped driven rod 57 located in the first chamber, and a return spring 58 sleeved on the driven rod 57 and connected to the partition seat 53. The end of the partition seat 53 near the mixing cavity is an expanded diameter end, where the minimum radius of the expanded diameter end is smaller than the minimum radius of the shoulder of the driven rod 57. A reserved area is provided within the connecting seat 55. The connecting block 54 has a connecting channel communicating with the area and the first chamber. The partition seat 53 has multiple oblique holes communicating with the second chamber and the area.

[0052] When it is necessary to transport the adhesive, it is divided into two stages: one is the heat preservation and preheating stage, and the other is the mixing stage. During the heat preservation and preheating stage, the driven rod 57 does not contact the stirring wheel 59 and both conveying pipes 52 are in the open state. At this time, the conveying pipe 52 near the connecting block 54 transports the adhesive, while the other conveying pipe 52 discharges the adhesive. During the circulation of the adhesive, the separator 53 can be heated to prevent large temperature fluctuations when the adhesive enters the mixing chamber through the separator 53, which would result in a low temperature of the final mixture. By circulating the adhesive, the temperature of the separator 53 can be increased and the temperature fluctuations can be reduced.

[0053] During the mixing stage, the delivery pipe 52 for discharging the colloid is closed. At this time, the colloid can rise along the outer wall of the partition seat 53, and then enter the area through the inclined hole. It then enters the partition seat 53 through the connecting channel in the connecting block 54. At this time, the operation of the stirring motor can drive the stirring wheel 59 to rotate, thereby causing the driven rod 57 to move away from the stirring wheel 59. At this time, the colloid can enter the mixing chamber, completing the addition of the colloid. Then, when the distal end of the stirring wheel 59 moves away from the driven rod 57, the driven rod 57 can block the colloid inlet with the cooperation of the return spring 58. Then, through the swing of the stirring wheel 59, the mixing of the grinding balls and the colloid is completed.

[0054] The adhesive circulates within the conveying chamber, which preheats the separator 53, preventing abnormal viscosity and flowability caused by sudden temperature changes when the adhesive enters the mixing chamber, thus ensuring the uniformity of subsequent mixing. Preheating makes the temperature of the separator 53 more consistent with the temperature of the adhesive, avoiding localized low temperatures caused by the cold wall effect, and making the feeding state of different batches of adhesive more stable.

[0055] The material distribution unit 3 includes a base 310 connected to the feeding bin 2, a discharge bin 31 disposed on the base 310, a transport pipe 32 connected to the discharge bin 31, a first bin 33 and a second bin 34 disposed on the base 310, a communication port 39 for connecting the first bin 33 and the second bin 34, and a loading component disposed in the first bin 33 for transporting grinding balls; the transport pipe 32 is used to transport grinding balls into the first bin 33; the second bin 34 is connected to the feeding bin 2; the loading component includes a loading motor fixedly connected to the base 310, a rotating shaft 35 connected to the output end of the loading motor and passing through the first bin 33 and the second bin 34 in sequence, a rotating disk 36 sleeved on the rotating shaft 35, a plurality of rotating rods 37 evenly disposed on the rotating disk 36, and an elastic sheet 38 disposed at the free end of the rotating rod 37;

[0056] When feeding grinding balls of different sizes, the grinding balls can enter the first hopper 33 through the transport pipe 32. Then the feeding motor starts to rotate, which drives the rotating shaft 35 to rotate. The rotating shaft 35 drives the rotating disk 36 to rotate, which in turn drives the rotating rod 37 to rotate, thereby driving the elastic plate 38 to move. Since the elastic plate 38 is in a circular motion, the grinding balls are positioned between the elastic plate 38 and the inner wall of the first hopper 33 during the rotation of the elastic plate 38. The elastic plate 38 drives the grinding balls to rotate, changing the position of the grinding balls so that they can enter the second hopper 34 through the connecting port 39. Thus, the grinding balls can enter the grinding hopper. The amount added can be confirmed each time the grinding balls are added. This not only completes the addition of grinding balls, but also controls the proportion of grinding balls of different sizes.

[0057] The flexible feeding plate 38 replaces the rigid feeding plate, reducing the impact damage and surface scratches of the grinding balls, while also reducing component wear and impact noise, and extending the service life of the feeding component and the grinding balls. Through the independent first material bin 33, second material bin 34 and connecting port 39 structure, combined with the quantitative feeding method of the feeding component, the addition ratio and single feeding amount of grinding balls of different diameters can be accurately controlled, solving the problem of inaccurate mixing ratio of grinding balls, affecting grinding efficiency and product accuracy, and ensuring the smooth progress of grinding work.

[0058] The length direction of the elastic sheet 38 has a preset angle with the axis of the rotating rod 37; the elastic sheet 38 is divided into a straight section and a curved section. The curved section has a C-shaped structure and its free end approaches the inner wall of the first hopper 33 with the connecting port 39. Through the elasticity of the elastic sheet 38 and the cooperation of the curved section, the grinding ball can be located between the curved section and the second hopper 34. Through the rotation of the rotating disk 36, the grinding ball can enter the second hopper 34 in sequence.

[0059] The connecting seat 55 is also provided with a gas delivery assembly 56, which is used to input nitrogen gas with a preset temperature into the area. The gas delivery assembly 56 includes a gas delivery seat 566 connected to the connecting seat 55, a gas injection port 5611 disposed on the gas delivery seat 566 and communicating with the area, a first air inlet 569 and a second air inlet 5610 respectively disposed on the gas delivery seat 566, a second gas delivery channel 568 for connecting the second air inlet 5610 and the gas injection port 5611, a transfer component disposed in the gas delivery seat 566, and a transfer component for connecting the first air inlet 569 and the transfer component. The first air supply channel 567 of the transport component; the transport component includes a cylinder 561 fixedly installed on the air supply seat 566, a sealing seat 562 connected to the output end of the cylinder 561, a limiting seat 563 located in the connecting seat 55, a distribution plate 564 located in the limiting seat 563, an air intake channel opened on the limiting seat 563, and a sealing block 565 provided at the output end of the cylinder 561; the air intake channel consists of two channels with different diameters, and the sealing block 565 is used to block the smaller diameter channel to cut off the gas; the distribution plate 564 is provided with multiple circumferential connecting holes;

[0060] After the mixing process is completed, gas is injected into the first air inlet 569 or the second air inlet 5610 by an air pump. Since the second air inlet 5610 is connected to the injection port 5611 through the second air passage 568, the gas injected from the second air inlet 5610 can be directly injected into the area. If other gas injection is required, the cylinder 561 starts to work. The moving cylinder 561 can drive the sealing seat 562 to work, so that the sealing seat 562 can move away from the limiting seat 563. At this time, the gas can enter the injection port 5611 along the distribution plate 564 and the limiting seat 563 to complete the gas injection. Moreover, since the injection port 5611 of the limiting seat 563 changes, the flow rate of the gas discharged from the limiting seat 563 is larger, which can complete the pushing of the mixture and allow the mixture to enter the grinding chamber.

[0061] This device features two independent air inlets and outlets, allowing access to different gas sources, such as ambient temperature nitrogen and preheated nitrogen, without interference. This meets the gas supply requirements for various operating conditions, including routine purging, preheating protection, and powerful pushing. The air inlet channel in the limit seat 563 adopts a dual-diameter structure, which, together with the sealing block 565, blocks or opens the smaller diameter channel. When the limit seat 563 is open, it can form a high-pressure, high-speed airflow to powerfully push the mixture and prevent it from sticking to the wall, accumulating, or bridging. When the second air inlet 5610 is inlet, the flow rate is stable, used for gentle purging and atmosphere protection, without impacting the material.

[0062] The sand mill 1 is also equipped with a defoaming unit 6, which is disposed on the grinding chamber of the sand mill 1. The defoaming unit 6 includes a connecting pipe 62 connected to the grinding chamber, an annular pipe 69 sleeved on the connecting pipe 62, a pre-storage cavity 68 reserved between the annular pipe 69 and the connecting pipe 62, an adjustment part disposed on the annular pipe 69, and a first guide pipe 63 and a second guide pipe 64 disposed in the connecting pipe 62. The diameters of the first guide pipe 63 and the second guide pipe 64 gradually decrease along the direction of airflow movement in the connecting pipe 62, forming a frustum-shaped structure. An exhaust chamber 65 is provided between the first guide pipe 63 and the second guide pipe 64, and an exhaust chamber 65 is provided in the second guide pipe 64. 4. Multiple air holes on the second guide pipe 64; a sealing plate 610 is provided on the second guide pipe 64, the sealing plate 610 extends toward the inner wall of the connecting pipe 62 and is connected to the connecting pipe 62, the sealing plate 610, the outer wall of the second guide pipe 64 and the inner wall of the connecting pipe 62 form a row of cavities, a third air inlet 67 is opened on the connecting pipe 62, an adjusting rod 61 is provided on the ring pipe 69 and screwed to the ring pipe 69, and a sealing gasket 66 is provided on the adjusting rod 61; one of the third air inlets 67 is used to connect the exhaust cavity and the pre-storage cavity 68; the sealing gasket 66 is used to block the connection between one of the third air inlets 67 and the pre-storage cavity 68; the exhaust cavity is connected to the exhaust chamber 65 through air holes;

[0063] After the material grinding is completed, the ground material flows through the connecting pipe 62 under its own weight. Since the first guide pipe 63 and the second guide pipe 64 are frustum structures with a gradually decreasing diameter along the flow direction, the slurry flow rate gradually increases in the pipe, forming a local negative pressure environment, which promotes the initial detachment of the gas attached to the surface of the nanomaterial. Then the negative pressure pump is started, forming a stable negative pressure in the pre-storage chamber 68. The adjusting rod 61 is rotated to move the sealing gasket 66 away from the third air inlet 67, and the pre-storage chamber 68 is connected to the exhaust chamber and the exhaust vent 65. At this time, under the continuous action of the negative pressure, the gas separated from the surface of the material enters the exhaust chamber through the exhaust vent 65 and the air hole, and then enters the pre-storage chamber 68 through the third air inlet 67. Finally, it is drawn out by the negative pressure pump and discharged from the connecting pipe 62, thereby completing the degassing and defoaming of the nanomaterial.

[0064] This device can perform gas extraction by actively stripping the gas and extracting it under negative pressure. The gas is the air mixed in during the material addition process. By adjusting the degree of sealing of the third air inlet 67, the negative pressure of extraction and the flow rate of exhaust can be flexibly controlled to adapt to nano-slurries with different viscosities and gas contents. This ensures sufficient degassing while avoiding excessive extraction.

[0065] Given the large specific surface area and strong surface gas adsorption force of nanomaterials, the first guide tube 63 and the second guide tube 64 form a local negative pressure when the material flows, which can directly act on the particle surface and overcome the gas adsorption force; together with the exhaust chamber 65, the pores and the venting chamber forming a continuous exhaust channel, the removed gas is quickly and orderly discharged, avoiding retention or secondary adsorption inside the slurry.

[0066] In a further embodiment, the mounting base 51 is also provided with a plurality of valves, which are used to control the opening of the conveying pipe 52 and the injection of the mixture of grinding balls and colloid.

[0067] Working principle description: During the heat preservation and preheating stage, the driven rod 57 does not contact the stirring wheel 59 and both conveying pipes 52 are in the open state. At this time, the conveying pipe 52 near the connecting block 54 conveys the colloid, while the other conveying pipe 52 discharges the colloid. During the circulation of the colloid, the separator 53 can be heated to prevent large temperature fluctuations during the process of the colloid entering the mixing chamber through the separator 53, which would result in a low temperature of the final mixture. By circulating the colloid, the temperature of the separator 53 can be increased and the temperature fluctuation can be reduced.

[0068] During the mixing stage, the delivery pipe 52 for discharging the colloid is closed. At this time, the colloid can rise along the outer wall of the partition seat 53, and then enter the area through the inclined hole. It then enters the partition seat 53 through the connecting channel in the connecting block 54. At this time, the operation of the stirring motor can drive the stirring wheel 59 to rotate, thereby causing the driven rod 57 to move away from the stirring wheel 59. At this time, the colloid can enter the mixing chamber, completing the addition of the colloid. Then, when the distal end of the stirring wheel 59 moves away from the driven rod 57, the driven rod 57 can block the colloid inlet with the cooperation of the return spring 58. Then, through the swing of the stirring wheel 59, the mixing of the grinding balls and the colloid is completed.

[0069] When feeding grinding balls of different sizes, the grinding balls can enter the first hopper 33 through the transport pipe 32. Then the feeding motor starts to rotate, which drives the rotating shaft 35 to rotate. The rotating shaft 35 drives the rotating disk 36 to rotate, which in turn drives the rotating rod 37 to rotate, thereby driving the elastic plate 38 to move. Since the elastic plate 38 is in a circular motion, the grinding balls are positioned between the elastic plate 38 and the inner wall of the first hopper 33 during the rotation of the elastic plate 38. The elastic plate 38 drives the grinding balls to rotate, changing the position of the grinding balls so that they can enter the second hopper 34 through the connecting port 39. Thus, the grinding balls can enter the grinding hopper. The amount added can be confirmed each time the grinding balls are added. This not only completes the addition of grinding balls, but also controls the proportion of grinding balls of different sizes.

[0070] After the mixing process is completed, gas is injected into the first air inlet 569 or the second air inlet 5610 by an air pump. Since the second air inlet 5610 is connected to the injection port 5611 through the second air passage 568, the gas injected from the second air inlet 5610 can be directly injected into the area. If other gas injection is required, the cylinder 561 starts to work. The moving cylinder 561 can drive the sealing seat 562 to work, so that the sealing seat 562 can move away from the limiting seat 563. At this time, the gas can enter the injection port 5611 along the distribution plate 564 and the limiting seat 563 to complete the gas injection. Moreover, since the diameter of the injection port 5611 of the limiting seat 563 changes, the flow rate of the gas discharged from the limiting seat 563 is larger, which can complete the pushing of the mixture and allow the mixture to enter the grinding chamber.

[0071] After the material grinding is completed, the ground material flows through the connecting pipe 62 under its own weight. Since the first guide pipe 63 and the second guide pipe 64 are frustum structures with a gradually decreasing diameter along the flow direction, the slurry flow rate gradually increases in the pipe, forming a local negative pressure environment, which promotes the initial detachment of the gas attached to the surface of the nanomaterial. Then the negative pressure pump is started, forming a stable negative pressure in the pre-storage chamber 68. The adjusting rod 61 is rotated to move the sealing gasket 66 away from the third air inlet 67, and the pre-storage chamber 68 is connected to the exhaust chamber and the exhaust vent 65. At this time, under the continuous action of the negative pressure, the gas separated from the surface of the material enters the exhaust chamber through the exhaust vent 65 and the air hole, and then enters the pre-storage chamber 68 through the third air inlet 67. Finally, it is drawn out by the negative pressure pump and discharged from the connecting pipe 62, thereby completing the degassing and defoaming of the nanomaterial.

[0072] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A self-priming feeding nanoscale sand mill, characterized in that, include: The main body of the sand mill (1), the feed bin (2) located on the main body of the sand mill (1), the multiple material distribution units (3) evenly arranged on the feed bin (2) for transporting grinding balls of different sizes into the feed bin (2), the protective cover (4) installed in the feed bin (2), and the premixing unit (5) located in the protective cover (4); The premixing unit (5) includes a mounting base (51) fixedly installed on the feed hopper (2), a mixing chamber opened on the mounting base (51), a stirring wheel (59) located in the mixing chamber, a stirring motor connected to the stirring wheel (59), a medium conveying channel (510) located on the mounting base (51) for connecting the mixing chamber and the feed hopper (2), a conveying part connected to the mixing chamber for conveying colloid and nitrogen, and a stirring motor provided on the mounting base (51) and connected to the stirring wheel (59).

2. The self-priming feeding nanoscale sand mill according to claim 1, characterized in that: The conveying section includes a conveying cavity formed in the mounting base (51) and communicating with the mixing cavity, a partition seat (53) located in the conveying cavity, and two conveying pipes (52) symmetrically arranged on the mounting base (51). The partition seat (53) is an inverted T-shaped mechanism that divides the conveying cavity into two areas, one of which is connected to the mixing cavity and the other is the second cavity.

3. The self-priming feeding nanoscale sand mill according to claim 2, characterized in that: A connecting block (54) is screwed onto the partition seat (53), a connecting seat (55) is provided on the mounting seat (51), a cross-shaped driven rod (57) is located in the first chamber, and a return spring (58) is sleeved on the driven rod (57) and connected to the partition seat (53). The end of the separator (53) near the mixing chamber is an expanded diameter end, wherein the minimum radius of the expanded diameter end is smaller than the minimum radius of the shoulder of the driven rod (57); The connecting seat (55) has a reserved area; the connecting block (54) is provided with a connecting channel that communicates with the area and the first chamber; The partition seat (53) is provided with a plurality of oblique holes that communicate with the second chamber and the region.

4. The self-priming feeding nanoscale sand mill according to claim 3, characterized in that: The material distribution unit (3) includes a base (310) connected to the feeding bin (2), a discharge bin (31) disposed on the base (310), a transport pipe (32) connected to the discharge bin (31), a first bin (33) and a second bin (34) disposed on the base (310), a communication port (39) for connecting the first bin (33) and the second bin (34), and a loading component disposed in the first bin (33) for transporting grinding balls; The transport pipe (32) is used to transport grinding balls into the first hopper (33); The second hopper (34) is connected to the feed hopper (2).

5. The self-priming feeding nanoscale sand mill according to claim 4, characterized in that: The feeding component includes a feeding motor fixedly connected to the base (310), a rotating shaft (35) connected to the output end of the feeding motor and passing through the first hopper (33) and the second hopper (34) in sequence, a rotating disk (36) sleeved on the rotating shaft (35), a plurality of rotating rods (37) evenly arranged on the rotating disk (36), and an elastic sheet (38) arranged at the free end of the rotating rod (37).

6. The self-priming feeding nanoscale sand mill according to claim 5, characterized in that: The length direction of the elastic sheet (38) has a preset angle with the axial direction of the rotating rod (37); The elastic sheet (38) is divided into a straight section and a curved section. The curved section has a C-shaped structure and its free end is close to the inner wall of the first hopper (33) with a connecting opening (39). By utilizing the elasticity of the elastic sheet (38) and the bending section, the grinding ball can be positioned between the bending section and the second hopper (34), and by rotating the rotating disk (36), the grinding ball can sequentially enter the second hopper (34).

7. The self-priming feeding nanoscale sand mill according to claim 6, characterized in that: The connecting seat (55) is also provided with a gas supply component (56), which is used to supply nitrogen gas with a preset temperature into the area; The gas delivery assembly (56) includes a gas delivery seat (566) connected to the connecting seat (55), an air injection port (5611) disposed on the gas delivery seat (566) and communicating with the area, a first air inlet (569) and a second air inlet (5610) respectively disposed on the gas delivery seat (566), a second gas delivery channel (568) for connecting the second air inlet (5610) and the air injection port (5611), a transfer member disposed in the gas delivery seat (566), and a first gas delivery channel (567) for connecting the first air inlet (569) and the transfer member.

8. The self-priming feeding nanoscale sand mill according to claim 7, characterized in that: The transfer component includes a cylinder (561) fixedly installed on the air supply seat (566), a sealing seat (562) connected to the output end of the cylinder (561), a limiting seat (563) located in the connecting seat (55), a distribution plate (564) located in the limiting seat (563), an air intake channel opened on the limiting seat (563), and a sealing block (565) provided at the output end of the cylinder (561). The air intake channel consists of two channels with different diameters, and the sealing block (565) is used to block the channel with smaller diameter to cut off the gas. The distribution plate (564) is provided with a plurality of circumferential connecting holes.

9. The self-priming feeding nanoscale sand mill according to claim 1, characterized in that: The sand mill (1) is also provided with a defoaming unit (6), which is located on the grinding chamber in the sand mill (1); The defoaming unit (6) includes a connecting pipe (62) connected to the grinding chamber, an annular pipe (69) sleeved on the connecting pipe (62), a pre-storage cavity (68) reserved between the annular pipe (69) and the connecting pipe (62), an adjustment part provided on the annular pipe (69), and a first guide pipe (63) and a second guide pipe (64) provided in the connecting pipe (62). The diameters of the first guide tube (63) and the second guide tube (64) gradually decrease along the direction of airflow movement in the connecting tube (62), forming a frustum-shaped structure; An exhaust chamber (65) is provided between the first guide tube (63) and the second guide tube (64), and a plurality of air holes are provided on the second guide tube (64).

10. The self-priming feeding nanoscale sand mill according to claim 9, characterized in that: The second guide tube (64) is provided with a sealing plate (610), which extends toward the inner wall of the connecting tube (62) and is connected to the connecting tube (62). The sealing plate (610), the outer wall of the second guide tube (64) and the inner wall of the connecting tube (62) form a row of cavities. A third air inlet (67) is opened on the connecting tube (62). An adjusting rod (61) is provided on the ring tube (69) and screwed to the ring tube (69). A sealing gasket (66) is provided on the adjusting rod (61). One of the third air inlets (67) is used to connect the venting chamber and the pre-storage chamber (68); the sealing gasket (66) is used to block the connection between one of the third air inlets (67) and the pre-storage chamber (68); The venting cavity is connected to the exhaust cavity (65) through a vent.

Images