A nanoscale comminution mill

Abstract

A nanoscale crushing grinder relates to the raw material powder particle grinding technical field of chemical industry, battery industry, biological engineering industry and the like. The nanoscale crushing grinder solves the problems that the existing crushing grinding equipment can only achieve micron level, cannot achieve nanometer level, and is difficult to accurately control the particle size of the material finished product, and is prone to over-grinding, re-agglomeration and empty grinding. The nanoscale crushing grinder is provided with a stirring paddle in the grinding chamber, the upper part of the stirring paddle is rotationally connected with the top cover, a stirring paddle rotary drive assembly is connected with the top part of the stirring paddle, an inner wall guide plate is arranged in the grinding chamber, the inner wall guide plate is a hollow structure, the top end of the inner wall guide plate is installed on the lower surface of the top cover, the upper surface of the top cover is provided with a discharge port and a feeding port in communication with the hollow pipe in the inner wall guide plate as a negative pressure interface for discharging and exhausting. The nanoscale crushing grinder is used for realizing coarse grinding, fine grinding and superfine grinding of raw material powder particles and separation of the product after subsequent product material grinding.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of raw material powder particle grinding, and particularly relates to a nanometer-level crushing and grinding machine. BACKGROUND

[0002] The crushing and grinding machine is one of the devices for realizing raw material powder particle crushing and grinding. The device can grind raw materials into fine particles. With the progress of science and the rapid development of economy, the raw material powder particles used in the chemical industry, the battery industry, the biological engineering industry and the like need to reach the nanometer level (0.1-0.9 μm). However, the existing crushing and grinding equipment can generally only crush and grind raw material powder particles to the micron level, and cannot reach the nanometer level. Moreover, the existing crushing and grinding equipment is difficult to accurately control the particle size of the material product, and is prone to over-grinding, re-agglomeration and empty grinding. The over-grinding phenomenon refers to that after the material reaches the required set diameter, the material is not discharged in time, and the material is continuously ground, so that the material particles are smaller than the required set diameter. The re-agglomeration phenomenon refers to that small material particles continuously collide in the grinding chamber and are connected together, and are combined into large particles by impact. In addition, the over-grinding and agglomeration also increase the energy consumption of the equipment. The empty grinding phenomenon refers to that due to the insufficient proportion of the material in the grinding chamber, the number of grinding between the grinding medium and the material is small, and the number of collision between the grinding medium itself is relatively large. Therefore, according to the market demand, a nanometer-level crushing and grinding device needs to be developed. SUMMARY

[0003] The present application relates to the technical field of raw material powder particle grinding, and particularly relates to a nanometer-level crushing and grinding machine.

[0004] The technical scheme of the present application is as follows:

[0005] The application discloses a nanoscale crushing grinder, which comprises a grinding chamber, an outer pot body, a rack, a grinding chamber rotary drive assembly and a top cover, the outer pot body is installed on the rack, the grinding chamber is coaxially arranged in the inner part of the outer pot body, the bottom of the grinding chamber is rotationally connected with the outer pot body, the grinding chamber rotary drive assembly is installed on the bottom of the outer pot body, the grinding chamber rotary drive assembly is connected with the bottom of the grinding chamber to drive the grinding chamber to rotate, the top cover is installed at the opening of the upper part of the outer pot body, the nanoscale crushing grinder further comprises a stirring paddle, a stirring paddle rotary drive assembly and an inner wall guide plate, the grinding chamber is filled with spherical grinding medium, the stirring paddle is arranged in the inner part of the grinding chamber, the upper part of the stirring paddle is rotationally connected with the top cover, the stirring paddle rotary drive assembly is installed on the upper part of the top cover, the stirring paddle rotary drive assembly is connected with the top part of the stirring paddle to drive the stirring paddle to rotate, the inner wall guide plate is arranged in parallel with the inner wall of the grinding chamber, the inner wall guide plate is a hollow structure, the top end of the inner wall guide plate is installed on the lower surface of the top cover, and the upper surface of the top cover is provided with a discharge port and a feeding port which is communicated with the hollow pipeline in the inner wall guide plate and is used as a negative pressure interface for discharging and exhausting.

[0006] Further, the stirring paddle is arranged eccentrically with the grinding chamber.

[0007] Further, the stirring paddle comprises a shaft and a plurality of cylindrical rods, a plurality of groups of stirring units are sequentially arranged from top to bottom along the length direction of the shaft on the side surface of the shaft, each group of stirring units comprises a plurality of cylindrical rods which are uniformly arranged in the circumferential direction, and the cylindrical rods are arranged in the radial direction of the shaft.

[0008] Further, the stirring paddle rotary drive assembly comprises a stirring paddle fixed support and a stirring paddle driving motor, the stirring paddle fixed support is installed on the upper surface of the top cover, the stirring paddle driving motor is installed on the stirring paddle fixed support, and the rotating shaft of the stirring paddle fixed support is connected with the top end of the shaft through a shaft coupling.

[0009] Further, the cross section of the inner wall guide plate is composed of a right-angled trapezoid and a semicircle, a rectangular through hole is formed in the lower bottom plate of the right-angled trapezoid part and penetrates the upper and lower end faces of the lower bottom plate, the semicircle part of the inner wall guide plate is arranged at the rectangular through hole of the lower bottom plate, the sharp angle of the right-angled trapezoid part faces the inner wall of the grinding chamber, and the distance between the sharp angle and the inner wall of the grinding chamber is 2mm-3mm.

[0010] Further, the distance between the lower end face of the inner wall guide plate and the bottom face of the grinding chamber is 8mm-12mm.

[0011] Further, the grinding chamber rotation drive assembly comprises a grinding chamber rotation reduction motor, a grinding chamber rotation transmission mechanism, a hollow transmission shaft, a grinding chamber seat sleeve, an outer pot seat sleeve and two support bearings. The outer pot body is provided with a pot body mounting through hole in the center of the bottom. The outer pot body is provided with a coaxially arranged outer pot seat sleeve below. The outer pot seat sleeve is fixedly connected with the lower surface of the outer pot body at the top end. The outer pot seat sleeve is provided with a coaxially arranged hollow transmission shaft inside. The hollow transmission shaft is rotatably connected with the inner side surface of the outer pot seat sleeve at the upper and lower ends of the outer side surface through two support bearings. The grinding chamber is provided with a coaxially arranged grinding chamber seat sleeve below. The grinding chamber seat sleeve is fixedly connected with the lower surface of the grinding chamber at the top end. The grinding chamber seat sleeve is provided with an integrally formed seat sleeve flange at the bottom. The hollow transmission shaft is provided with an integrally formed transmission shaft flange at the top end. The transmission shaft flange is connected with the seat sleeve flange through a plurality of connecting elements. The outer pot seat sleeve is provided with a vertically arranged grinding chamber rotation reduction motor on the side. The grinding chamber rotation reduction motor housing is fixedly connected with the side surface of the outer pot seat sleeve. The outer pot seat sleeve is provided with a seat sleeve shaft hole radially arranged on the side surface. The grinding chamber rotation reduction motor shaft extends to the inside of the outer pot seat sleeve through the seat sleeve shaft hole. The grinding chamber rotation reduction motor shaft is connected with the hollow transmission shaft through the grinding chamber rotation transmission mechanism.

[0012] Further, the grinding chamber rotation transmission mechanism comprises a driving bevel gear and a driven bevel gear. The center of the driving bevel gear and the center of the driven bevel gear are respectively provided with two gear shaft holes matched with the grinding chamber rotation reduction motor shaft and the hollow transmission shaft. The driving bevel gear is installed on the grinding chamber rotation reduction motor shaft through a flat key. The driven bevel gear is installed on the hollow transmission shaft through a flat key. The driven bevel gear is engaged with the driving bevel gear.

[0013] Further, the nanoscale crushing grinder further comprises a cover body overturning assembly. The cover body overturning assembly comprises an overturning motor support, a cover body overturning reduction motor and a cover body support arm. The top cover is provided with an overturning motor support on the side. The overturning motor support is installed on the upper part of the side wall of the outer pot body. The cover body overturning reduction motor housing is installed on the overturning motor support. One end of the cover body support arm is provided with a support arm shaft hole. The cover body overturning reduction motor shaft is connected with the support arm shaft hole through a flat key. The other end of the cover body support arm is provided with an integrally formed rectangular flange. The rectangular flange is connected with the top cover through a plurality of connecting elements.

[0014] Further, the nanoscale crushing grinder further comprises a pot body pitching assembly. The pot body pitching assembly comprises a pitching motor support, a pot body pitching reduction motor, a pot body driving shaft and a pot body driven shaft. The frame is a U-shaped frame. The outer pot body is located between the two side plates of the U-shaped frame. The left and right side walls of the outer pot body are rotatably connected with the two side plates of the U-shaped frame through the pot body driving shaft and the pot body driven shaft. The pitching motor support is provided with a pitching motor support on the side. The pitching motor support is installed on the pitching motor support. The pot body pitching reduction motor housing is installed on the pitching motor support. The pot body pitching reduction motor shaft is connected with the pot body driving shaft through a shaft coupling.

[0015] Compared with the prior art, the present application has the following effects:

[0016] 1. The nanoscale crushing grinder can realize coarse grinding, fine grinding and superfine grinding of raw material powder particles. The nanoscale crushing grinder adopts the combined action of raw material gravity feeding and air flow to realize feeding. In the grinding chamber, the raw material is effectively ground by the impact force and friction force generated by the action of the spherical grinding medium through the energy input by the stirring paddle, so that the raw material powder particles after crushing and grinding can reach the nanoscale (0.1 μm-0.9 μm).

[0017] 2. The nanoscale crushing grinder can effectively control the particle size of the finished product, reduce the over-grinding phenomenon, re-agglomeration phenomenon and air grinding phenomenon. The nanoscale crushing grinder is a continuous production device. The raw material and air enter the feeding port. After being fully ground in the grinding chamber, the material is taken out from the discharge port by the shaking force of the air. The theoretical basis is that the material particles are affected by gravity and fall downward. The material and the spherical grinding medium are thrown by the stirring paddle. The spherical grinding medium and the material, the inner wall of the grinding chamber collide and abrade fully in the air. The material particles become smaller and smaller. As the particle size decreases, the gravity of the material also decreases proportionally. When the gravity is less than the shaking force of the air, the material will be taken out with the air. Because the grinding chamber is full of air flow, no matter where in the grinding chamber, as long as small particles of a certain size are generated, they will be taken out of the grinding chamber by the air, realizing effective discharge. This way effectively controls the particle size of the finished product, reduces the over-grinding phenomenon, re-agglomeration phenomenon and air grinding phenomenon.

[0018] 3. The nanoscale crushing grinder can effectively reduce energy consumption. The over-grinding phenomenon and re-agglomeration phenomenon will also increase the energy consumption of the device. Therefore, the device also effectively reduces energy consumption. By adjusting the discharge amount, continuously feeding through the feeding port, ensuring that the weight of the material in the grinding chamber remains unchanged, reducing the air grinding phenomenon, and also effectively reducing the energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a front view of the nanoscale crushing grinder of the present application;

[0020] Figure 2 is a side view of the nanoscale crushing grinder of the present application

[0021] Figure 3 is a top view of the nanoscale crushing grinder of the present application;

[0022] Figure 4 is an isometric view of the nanoscale crushing grinder of the present application;

[0023] Figure 5 is a sectional view of the inner wall guide plate of the nanoscale crushing grinder of the present application.

[0024] In the figure: 1, grinding chamber; 2, outer pot body; 3, machine frame; 4, grinding chamber rotary drive assembly; 401, grinding chamber rotary speed reducer motor; 402, hollow transmission shaft; 403, grinding chamber seat sleeve; 404, outer pot seat sleeve; 405, support bearing; 406, driving bevel gear; 407, driven bevel gear; 5, top cover; 6, stirring paddle; 601, mandrel; 602, cylindrical rod body; 7, stirring paddle rotary drive assembly; 701, stirring paddle fixed support; 702, stirring paddle drive motor; 8, inner wall guide plate; straight 801, angle trapezoidal part; 802, semicircular part; 803, sharp angle; 9, cover body overturning assembly; 901, overturning motor support; 902, cover body overturning speed reducer motor; 903, cover body support arm; 10, pot body tilting assembly; 1001, tilting motor support; 1002, pot body tilting speed reducer motor; 1003, pot body driving shaft; 1004, pot body driven shaft; 100, discharge port; 200, feed inlet; 300, raw material; 400, finished product; 500, fluidizing air. DETAILED DESCRIPTION

[0025] Specific implementation method one: combination Figures 1 to 5 To illustrate this embodiment, the nanoscale pulverizing grinder of this embodiment includes a grinding chamber 1, an outer pot body 2, a machine frame 3, a grinding chamber rotary drive assembly 4, and a top cover 5. The outer pot body 2 is installed on the machine frame 3, and the outer pot body 2 is internally provided with the coaxially arranged grinding chamber 1. The bottom of the grinding chamber 1 is rotationally connected with the outer pot body 2. The grinding chamber rotary drive assembly 4 is installed at the bottom of the outer pot body 2. The grinding chamber rotary drive assembly 4 is connected with the bottom of the grinding chamber 1 to drive the grinding chamber 1 to rotate. The top cover 5 is installed at the opening of the upper portion of the outer pot body 2. The nanoscale pulverizing grinder further includes a stirring paddle 6, a stirring paddle rotary drive assembly 7, and an inner wall guide plate 8. The grinding chamber 1 is filled with spherical grinding media. The stirring paddle 6 is arranged inside the grinding chamber 1. The upper portion of the stirring paddle 6 is rotationally connected with the top cover 5. The stirring paddle rotary drive assembly 7 is installed at the upper portion of the top cover 5. The stirring paddle rotary drive assembly 7 is connected with the top portion of the stirring paddle 6 to drive the stirring paddle 6 to rotate. The inner wall guide plate 8 is arranged parallel to the inner wall of the grinding chamber 1. The inner wall guide plate 8 is of a hollow structure. The top end of the inner wall guide plate 8 is installed at the lower surface of the top cover 5. The upper surface of the top cover 5 is provided with a discharge port 100 and a feed inlet 200 that is in communication with the hollow pipe inside the inner wall guide plate 8 and serves as a negative pressure interface for discharging and exhausting.

[0026] Specific implementation method two: combination Figures 1 to 5 To illustrate this embodiment, the stirring paddle 6 of this embodiment is arranged eccentrically with the grinding chamber 1. In this way, the stirring paddle 6 is driven by the stirring paddle rotary drive assembly 7 to rotate at a high speed. The stirring paddle 6 and the grinding chamber 1 operate in opposite directions or in the same direction. The other components and connection relationships are the same as those of specific implementation method one.

[0027] Specific implementation three: combination Figures 1 to 5 In this embodiment, the stirring paddle 6 includes a mandrel 601 and a plurality of cylindrical rods 602. The mandrel 601 is provided with a plurality of stirring units from top to bottom along the length direction of the mandrel. Each stirring unit includes a plurality of cylindrical rods 602 arranged uniformly in the circumferential direction. The cylindrical rods 602 are arranged radially along the mandrel 601. In this way, the high-speed rotating stirring paddle 6 drives the raw materials 300 and the spherical grinding media inside the grinding chamber 1 to rotate at high speed, forming a vortex-shaped fluid, and achieving the crushing and grinding of the raw materials 300 under the joint action of the high-speed rotating grinding chamber 1. The other components and connection relationships are the same as those of the first or second embodiment.

[0028] Specific implementation four: combination Figures 1 to 5 In this embodiment, the stirring paddle rotary drive assembly 7 includes a stirring paddle fixed support 701 and a stirring paddle drive motor 702. The stirring paddle fixed support 701 is installed on the upper surface of the top cover 5, and the stirring paddle drive motor 702 is installed on the stirring paddle fixed support 701. The rotating shaft of the stirring paddle fixed support 701 is connected to the top end of the mandrel 601 through a shaft coupling. In this way, the stirring paddle 6 is driven to rotate by the stirring paddle drive motor 702, and the rotating direction of the stirring paddle 6 is clockwise when viewed from above. The other components and connection relationships are the same as those of the first, second, or third embodiment.

[0029] Specific implementation five: combination Figures 1 to 5 In this embodiment, the inner wall deflector 8 has a cross section composed of a right trapezoidal part 801 and a semicircular part 802. The lower bottom plate of the right trapezoidal part 801 is provided with a rectangular through hole extending through the upper and lower end faces of the lower bottom plate. The semicircular part 802 of the inner wall deflector 8 is arranged at the rectangular through hole of the lower bottom plate. The sharp corner 803 of the right trapezoidal part 801 faces the inner wall of the grinding chamber 1, and the distance between the sharp corner 803 and the inner wall of the grinding chamber 1 is 2-3 mm. In this way, the sharp corner 803 of the inner wall deflector 8 maintains a small distance from the inner wall of the grinding chamber 1, ensuring that the material does not adhere to the inner wall of the grinding chamber 1. The other components and connection relationships are the same as those of the first, second, third, or fourth embodiment.

[0030] The right trapezoidal part 801, the semicircular part 802, and the sharp corner 803 are connected by welding.

[0031] Specific implementation six: combination Figures 1 to 5The distance between the lower end surface of the inner wall flow guide plate 8 and the bottom surface of the grinding chamber 1 is 8-12 mm. In this way, the inner wall flow guide plate 8 extends along the inner wall of the grinding chamber 1 to the bottom of the pot, and the inner wall flow guide plate 8 is a hollow structure with a hollow pipe inside. The other components and connection relationships are the same as those in embodiments one, two, three, four, five, or six.

[0032] Embodiment seven: in combination with Figures 1 to 5 In this embodiment, the grinding chamber rotary drive assembly 4 includes a grinding chamber rotary reduction motor 401, a grinding chamber rotary transmission mechanism, a hollow transmission shaft 402, a grinding chamber seat sleeve 403, an outer pot seat sleeve 404, and two support bearings 405. The outer pot body 2 has a pot body mounting through hole in the center of the bottom, and the outer pot body 2 has a coaxially arranged outer pot seat sleeve 404 below. The top end of the outer pot seat sleeve 404 is fixedly connected to the lower surface of the outer pot body 2, and the inner part of the outer pot seat sleeve 404 is provided with a coaxially arranged hollow transmission shaft 402. The outer side of the hollow transmission shaft 402 is rotatably connected to the inner side of the outer pot seat sleeve 404 at the upper and lower ends through two support bearings 405. The lower part of the grinding chamber 1 is provided with a coaxially arranged grinding chamber seat sleeve 403, and the top end of the grinding chamber seat sleeve 403 is fixedly connected to the lower surface of the grinding chamber 1. The bottom of the grinding chamber seat sleeve 403 is provided with an integrally formed seat flange, and the top end of the hollow transmission shaft 402 is provided with an integrally formed transmission shaft flange. The transmission shaft flange is connected to the seat flange through a plurality of connecting elements. The side of the outer pot seat sleeve 404 is provided with a vertically arranged grinding chamber rotary reduction motor 401, and the housing of the grinding chamber rotary reduction motor 401 is fixedly connected to the side surface of the outer pot seat sleeve 404. The side surface of the outer pot seat sleeve 404 is provided with a seat shaft hole in the radial direction, and the rotating shaft of the grinding chamber rotary reduction motor 401 extends to the inside of the outer pot seat sleeve 404 through the seat shaft hole. The rotating shaft of the grinding chamber rotary reduction motor 401 is connected to the hollow transmission shaft 402 through the grinding chamber rotary transmission mechanism. In this way, the grinding chamber 1 is driven to rotate by the grinding chamber rotary reduction motor 401, and the rotation direction of the grinding chamber 1 is clockwise when viewed from above. The other components and connection relationships are the same as those in embodiments one, two, three, four, five, or six.

[0033] Embodiment eight: in combination with Figures 1 to 5The grinding chamber rotation transmission mechanism of the embodiment comprises a driving bevel gear 406 and a driven bevel gear 407, both of which are centrally provided with two gear shaft holes matching the rotating shaft of the grinding chamber rotation reduction motor 401 and the hollow transmission shaft 402. The driving bevel gear 406 is installed on the rotating shaft of the grinding chamber rotation reduction motor 401 through a flat key, and the driven bevel gear 407 is installed on the hollow transmission shaft 402 through a flat key. The driven bevel gear 407 is engaged with the driving bevel gear 406. In this way, the grinding chamber rotation reduction motor 401 drives the driving bevel gear 406 to rotate, and the driving bevel gear 406 is engaged with the driven bevel gear 407, which drives the hollow transmission shaft 402 to rotate, and further drives the grinding chamber seat 403 and the grinding chamber 1 to rotate. The other components and connection relationships are the same as those of the first, second, third, fourth, fifth, sixth, or seventh embodiments.

[0034] Eighth embodiment: combination Figures 1 to 5 The nanoscale crushing grinder of the embodiment further comprises a cover body overturning assembly 9, which comprises an overturning motor support 901, a cover body overturning reduction motor 902, and a cover body support arm 903. The overturning motor support 901 is arranged on the side of the top cover 5 and is installed on the upper part of the side wall of the outer pot body 2. The cover body overturning reduction motor 902 is installed on the overturning motor support 901. The cover body support arm 903 is provided with a support arm shaft hole at one end, and the rotating shaft of the cover body overturning reduction motor 902 is connected to the support arm shaft hole through a flat key. The other end of the cover body support arm 903 is provided with an integrally formed rectangular flange, which is connected to the top cover 5 through a plurality of connecting elements. In this way, the top cover 5 is driven to overturn by the cover body overturning reduction motor 902, which facilitates the loading of spherical grinding media into the grinding chamber 1, or the replacement of spherical grinding media in the grinding chamber 1, or the cleaning and washing of the interior of the grinding chamber 1, or the installation and disassembly of components in the grinding chamber 1. The other components and connection relationships are the same as those of the first, second, third, fourth, fifth, sixth, seventh, or eighth embodiments.

[0035] Tenth embodiment: combination Figures 1 to 5To illustrate the embodiment, the nanoscale pulverizing grinder of the embodiment further comprises a kettle tilting assembly 10, the kettle tilting assembly 10 comprising a tilting motor support 1001, a kettle tilting reduction motor 1002, a kettle driving shaft 1003 and a kettle driven shaft 1004, the rack 3 being a U-shaped rack, the outer kettle 2 being located between the two side wings of the U-shaped rack, the left and right side walls of the outer kettle 2 being rotatably connected to the two side wings of the U-shaped rack through the kettle driving shaft 1003 and the kettle driven shaft 1004, the tilting motor support 1001 being provided with a tilting motor support 1001, the tilting motor support 1001 being installed on the tilting motor support 1001, the kettle tilting reduction motor 1002 being installed on the tilting motor support 1001, and the kettle tilting reduction motor 1002 being connected to the kettle driving shaft 1003 through a shaft coupling. In this way, the outer kettle 2 is driven to perform tilting action by the kettle tilting reduction motor 1002, and in the non-working condition, it can be used to clean the grinding chamber 1. This function is not started in the pulverizing and grinding process. The other components and connection relationships are the same as those of the first, second, third, fourth, fifth, sixth, seventh, eighth or ninth specific embodiments.

[0036] Working principle

[0037] Combination ​ The working principle of the nanoscale pulverizing grinder according to the present application is as follows: the capacity of the grinding chamber 1 is 80-90%, and the grinding chamber 1 is filled with spherical grinding media. The raw material 300 is fed into the hollow pipe inside the inner wall guide plate 8 through the feed port 200 on the top cover 5 and the air flow, and is then conveyed to a position close to the bottom of the grinding chamber 1. At this position, the raw material 300 is sucked into the stirred spherical grinding media by the rotation of the grinding chamber 1. In the grinding chamber 1, the energy input by the stirring paddle 6 produces impact force and friction force for effective grinding through the action of the spherical grinding media. When the raw material 300 is ground into fine particles, the particles move upward from the bottom by means of the fluidizing air 500. The finer the particles, the higher the position of movement. When the particles reach the finished product 400, the discharge is completed through the discharge port 100 on the top cover 5.

[0038] Specifically, first, the feed area A at the feed port 200 is determined according to the feed amount M 进 , the material-wrapping wind speed V is determined according to the particle diameter of the raw material 300 原 , and the spherical grinding media are preloaded into the grinding chamber 1. The wind-wrapping raw material 300 enters the inside of the hollow pipe of the inner wall guide plate 8, and then enters the inside of the grinding chamber 1. The entry point of the raw material 300 is close to the bottom plate of the grinding chamber 1. With the rotation of the grinding chamber 1 and the stirring paddle 6, the spherical grinding media and the raw material 300 are brought into irregular collision in the grinding chamber 1, and the raw material 300 is eroded and becomes smaller and smaller. The wind-wrapping wind continuously enters the grinding chamber 1 with the raw material 300, and is continuously discharged from the discharge port 100.

[0039] Q = AVS (1)

[0040] Wherein, Q is the air volume, A is the cross-sectional area of the air, V is the air speed, and S is the time.

[0041] According to the material particle diameter of the finished product 400, the feeding air speed V at the feeding port 200 is determined 进 and the discharging air speed V at the discharging port 100 is determined 出 , the known conditions of the feeding air speed V 进 , the discharging air speed V 出 and the feeding port area A 进 are substituted into equation (1) to obtain the discharging port area A 出 at the discharging port 100, so that the feeding port area A 进 is controlled to control the discharging air speed V 出 at the discharging port 100, and the discharging port air entrains the material particles of the finished product 400 to fly out of the grinding chamber 1.

[0042] The above examples are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A nanometer size pulverizing mill, comprising a grinding chamber (1), an outer pot body (2), a frame (3), a grinding chamber rotary drive assembly (4) and a top cover, the outer pot body (2) is installed on the frame (3), the outer pot body (2) is internally provided with the coaxially arranged grinding chamber (1), the bottom of the grinding chamber (1) is rotationally connected with the outer pot body (2), the grinding chamber rotary drive assembly (4) is installed at the bottom of the outer pot body (2), the grinding chamber rotary drive assembly (4) is connected with the bottom of the grinding chamber (1) to drive the grinding chamber (1) to rotate, and the top cover is installed at the opening of the upper portion of the outer pot body (2), characterized in that: The nanoscale crushing mill further comprises a stirring paddle, a stirring paddle rotary drive assembly (7) and an inner wall guide plate (8), the grinding chamber (1) is filled with spherical grinding media, the grinding chamber (1) is internally provided with the stirring paddle, the upper portion of the stirring paddle is rotationally connected with the top cover, the stirring paddle rotary drive assembly (7) is installed on the upper portion of the top cover, the stirring paddle rotary drive assembly (7) is connected with the top portion of the stirring paddle to drive the stirring paddle to rotate, the grinding chamber (1) is further internally provided with the inner wall guide plate (8) which is arranged in parallel with the inner wall of the grinding chamber (1), the inner wall guide plate (8) is a hollow structure, the top end of the inner wall guide plate (8) is installed on the lower surface of the top cover, the upper surface of the top cover is provided with a discharge port (100) and a feeding port (200) which is in communication with the hollow pipe inside the inner wall guide plate (8) and is used as a negative pressure interface for discharging and exhausting, the cross section of the inner wall guide plate (8) is composed of a right trapezoid and a semicircle, a rectangular through hole is formed in the lower bottom plate of the right trapezoidal portion (801) of the inner wall guide plate (8), the rectangular through hole penetrates the upper and lower end faces of the lower bottom plate of the right trapezoidal portion (801), the semicircular portion (802) of the inner wall guide plate (8) is arranged at the rectangular through hole of the lower bottom plate, the acute angle (803) of the right trapezoidal portion (801) faces the inner wall of the grinding chamber (1), the distance between the acute angle (803) and the inner wall of the grinding chamber (1) is 2mm-3mm, so that the material cannot be attached to the inner wall of the grinding chamber (1), and the distance between the lower end face of the inner wall guide plate (8) and the bottom surface of the grinding chamber (1) is 8mm-12mm. ​ 2. A nanoscale comminution mill according to claim 1, wherein: The stirring paddle is arranged eccentrically with the grinding chamber (1).

3. A nanometer-scale comminution mill according to claim 1 or 2, characterised in that: The stirring paddle comprises a core shaft (601) and a plurality of cylindrical rod bodies (602), a plurality of groups of stirring units are sequentially arranged on the side surface of the core shaft (601) from top to bottom along the length direction of the core shaft, each group of stirring units comprises a plurality of cylindrical rod bodies (602) which are uniformly arranged in the circumferential direction, and the cylindrical rod bodies (602) are arranged in the radial direction of the core shaft (601).

4. A nanoscale comminution mill according to claim 3, wherein: The stirring paddle rotary drive assembly (7) comprises a stirring paddle fixed support (701) and a stirring paddle drive motor (702), the stirring paddle fixed support (701) is installed on the upper surface of the top cover, the stirring paddle drive motor (702) is installed on the stirring paddle fixed support (701), and the rotary shaft of the stirring paddle fixed support (701) is connected with the top end of the core shaft (601) through a coupling.

5. A nanoscale comminution mill according to claim 4, wherein: The grinding chamber rotation driving assembly (4) comprises a grinding chamber rotation reduction motor (401), a grinding chamber rotation transmission mechanism, a hollow transmission shaft (402), a grinding chamber seat sleeve (403), an outer pot seat sleeve (404) and two support bearings (405). The outer pot body (2) is provided with a pot body mounting through hole in the center of the bottom. The outer pot body (2) is provided with the outer pot seat sleeve (404) coaxially arranged below. The outer pot seat sleeve (404) is fixedly connected with the lower surface of the outer pot body (2) at the top end. The outer pot seat sleeve (404) is provided with the hollow transmission shaft (402) coaxially arranged inside. The hollow transmission shaft (402) is rotatably connected with the inner side surface of the outer pot seat sleeve (404) at the upper and lower ends of the outer side surface through the two support bearings (405). The grinding chamber (1) is provided with the grinding chamber seat sleeve (403) coaxially arranged below. The grinding chamber seat sleeve (403) is fixedly connected with the lower surface of the grinding chamber (1) at the top end. The grinding chamber seat sleeve (403) is provided with a seat sleeve flange integrally formed at the bottom. The hollow transmission shaft (402) is provided with a transmission shaft flange integrally formed at the top end. The transmission shaft flange is connected with the seat sleeve flange through a plurality of connecting elements. The outer pot seat sleeve (404) is provided with the grinding chamber rotation reduction motor (401) arranged vertically at the side. The housing of the grinding chamber rotation reduction motor (401) is fixedly connected with the side surface of the outer pot seat sleeve (404). The outer pot seat sleeve (404) is provided with a seat sleeve shaft hole radially arranged at the side. The rotating shaft of the grinding chamber rotation reduction motor (401) extends to the inside of the outer pot seat sleeve (404) through the seat sleeve shaft hole. The rotating shaft of the grinding chamber rotation reduction motor (401) is connected with the hollow transmission shaft (402) through the grinding chamber rotation transmission mechanism.

6. A nanoscale comminution mill according to claim 5, wherein: The grinding chamber rotation transmission mechanism comprises a driving bevel gear (406) and a driven bevel gear (407). The driving bevel gear (406) and the driven bevel gear (407) are respectively provided with two gear shaft holes matched with the rotating shaft of the grinding chamber rotation reduction motor (401) and the hollow transmission shaft (402) at the center. The driving bevel gear (406) is installed on the rotating shaft of the grinding chamber rotation reduction motor (401) through a flat key. The driven bevel gear (407) is installed on the hollow transmission shaft (402) through a flat key. The driven bevel gear (407) is engaged with the driving bevel gear (406).

7. A nanoscale comminution mill according to claim 6, wherein: The nanoscale crushing grinder further comprises a cover body overturning assembly (9). The cover body overturning assembly (9) comprises an overturning motor support (901), a cover body overturning reduction motor (902) and a cover body support arm (903). The overturning motor support (901) is installed on the upper portion of the side wall of the outer pot body (2) at the side of the top cover. The housing of the cover body overturning reduction motor (902) is installed on the overturning motor support (901). The cover body support arm (903) is provided with a support arm shaft hole at one end. The rotating shaft of the cover body overturning reduction motor (902) is connected with the support arm shaft hole through a flat key. The cover body support arm (903) is provided with a rectangular flange integrally formed at the other end. The rectangular flange is connected with the top cover through a plurality of connecting elements.

8. A nanoscale comminution mill according to claim 7, wherein: The nanoscale crushing grinder further comprises a kettle pitching assembly (10), the kettle pitching assembly (10) comprises a pitching motor support (1001), a kettle pitching reduction motor (1002), a kettle driving shaft (1003) and a kettle driven shaft (1004), the rack (3) is a N-shaped rack, the outer kettle (2) is located between the two side wings of the N-shaped rack, the left and right side walls of the outer kettle (2) are rotatably connected with the two side wings of the N-shaped rack through the kettle driving shaft (1003) and the kettle driven shaft (1004), and the kettle pitching reduction motor (1002) is installed on the pitching motor support (1001), and the kettle pitching reduction motor (1002) is connected with the kettle driving shaft (1003) through a shaft coupling.

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