Efficient crushing unit and grinding crusher

Abstract

The efficient crushing unit comprises an air passing cavity, an inner cylinder and an outer cylinder, and the inner cylinder and the outer cylinder are arranged in a sleeved mode. The inner cylinder and the outer cylinder can eccentrically rotate in opposite rotating directions under the action of an external driving unit; a conical grinding cavity is formed between the inner cylinder and the outer cylinder, the grinding cavity is upwards communicated with the feeding port, the grinding cavity is downwards communicated with the discharging port, the grinding cavity comprises a plurality of length sections extending downwards in a stepped mode, and the grinding cavity comprises a plurality of first grinding teeth fixedly arranged on the inner cylinder and a plurality of second grinding teeth fixedly arranged on the outer cylinder. The first grinding teeth and the second grinding teeth are used for extruding and crushing materials; the outer cylinder is sleeved with the air passing cavity, and an air cushion layer can be formed on the inner wall face of the outer cylinder. The grinding and crushing machine comprises a rack, and the efficient crushing unit is arranged on the rack. The crushing and grinding device is reasonable in structure, high in crushing and grinding efficiency and more uniform in granularity after crushing and grinding.

Description

Technical Field

[0001] The present invention relates to the technical field of pharmaceutical equipment, and specifically to an efficient crushing unit and a grinding mill. Background Art

[0002] In the pharmaceutical process, it is often necessary to use a grinding mill to crush and grind materials, that is, to disperse agglomerated powder or granular materials into smaller particles by mechanical force, or to break larger blocks into a specified particle size range to meet the requirements of the production process. In the prior art, the shearing force or impact force applied by the grinding and crushing mechanism to the materials has low efficiency, or the crushing and grinding force is uneven, and it often takes repeated processing to complete all the materials, which is time-consuming and laborious. Summary of the Invention

[0003] The present invention discloses an efficient crushing unit and a grinding mill, which solve the technical problems of low crushing and grinding efficiency and uneven acting force of the grinding and crushing mechanism in the prior art, and have the technical effects of reasonable structure, high crushing and grinding efficiency, and more uniform particle size after crushing and grinding. The technical solutions adopted are as follows: An efficient crushing unit includes a gas passing cavity, an inner cylinder and an outer cylinder sleeved thereon; The inner cylinder and the outer cylinder can rotate eccentrically in opposite directions under the action of an external driving unit; A conical grinding cavity is formed between the inner cylinder and the outer cylinder. The grinding cavity communicates with a feed port upward and a discharge port downward. The grinding cavity includes a plurality of length segments extending stepwise downward, and the grinding cavity includes a number of first grinding teeth fixed on the inner cylinder and a number of second grinding teeth fixed on the outer cylinder. The first grinding teeth and the second grinding teeth are used to squeeze and crush the materials.

[0004] The gas passing cavity is sleeved outside the outer cylinder. The gas passing cavity is communicated with an air inlet, and the gas passing cavity is communicated with the grinding cavity through a number of through holes provided on the outer cylinder. When external air or inert gas enters the grinding cavity through the through holes, an air cushion layer can be formed on the inner wall surface of the outer cylinder to prevent the materials from sticking to the wall or caking.

[0005] On the basis of the above technical solution, the first grinding teeth extend along an arc, and a first groove extending in a spiral shape is formed between two adjacent first grinding teeth; the second grinding teeth avoid the first grinding teeth and extend along an arc, and the arc openings of the first grinding teeth and the second grinding teeth face in opposite directions. A second groove extending in a spiral shape with a direction opposite to that of the first groove is formed between two adjacent second grinding teeth.

[0006] On the basis of the above technical solution, the multiple length segments of the grinding cavity gradually narrow towards the discharge port to crush and grind the materials step by step.

[0007] On the basis of the above technical solution, a hammer pressing ring is fixedly arranged on the outer wall surface of the inner cylinder, the inner wall surface of the outer cylinder includes a stepped diameter-changing surface connecting two adjacent length segments, and a hammer pressing cavity formed by the hammer pressing ring and the stepped diameter-changing surface can extrude and crush materials, and the thickness of a plurality of hammer pressing cavities gradually decreases towards the material outlet direction.

[0008] On the basis of the above technical solution, the inner cylinder is connected to the outer cylinder in a displaceable manner up and down.

[0009] On the basis of the above technical solution, the opening of the through hole on the outer cylinder avoids the second grinding teeth, and the axis of the through hole extends along the horizontal tangent line of the inner wall surface of the outer cylinder.

[0010] On the basis of the above technical solution, the grinding cavity is also communicated with an exhaust port upwards, the exhaust port is arranged away from the feed port, and a breather is arranged at the exhaust port.

[0011] On the basis of the above technical solution, a cooling cavity is sleeved outside the air passing cavity, and the cooling cavity is communicated with a cooling inlet and a cooling outlet to cool the grinding cavity. Preferably, a cooling pipe is also arranged in the inner cylinder for cooling the grinding cavity.

[0012] On the basis of the above technical solution, a driving unit is further included. The driving unit includes a motor, a transmission mechanism and an eccentric shaft. The eccentric shaft is coaxially and fixedly connected to the inner cylinder downwards. The transmission mechanism is designed to transmit the rotational movement of the main shaft of the motor to the inner cylinder and the outer cylinder, driving the outer cylinder to rotate forward, the inner cylinder to rotate reversely and the inner cylinder to rotate eccentrically relative to the outer cylinder. The eccentric shaft passes through a fixedly arranged cover plate upwards and is rotatably connected to the cover plate through an eccentric bearing. A regulating nut is sleeved on the part of the eccentric shaft extending outside the cover plate. The regulating nut is screwed with the eccentric shaft and abuts against the cover plate downwards.

[0013] A grinding and pulverizing machine includes a frame, and the above-mentioned high-efficiency pulverizing unit is arranged on the frame.

[0014] Beneficial effects In the present invention, the structure of the pulverizing unit is reasonable. The inner cylinder and the outer cylinder rotate in opposite directions, so that the materials in the grinding cavity are rubbed and pulverized to a large extent. At the same time, the inner cylinder also rotates eccentrically relative to the outer cylinder. In this way, while rubbing and pulverizing the materials, the materials are repeatedly compressed and released. On the one hand, the pulverizing speed of the materials can be accelerated and the pulverizing uniformity can be improved. On the other hand, it effectively avoids the blockage of the grinding cavity due to high viscosity of the materials and is beneficial to ensuring the continuity of the pulverizing and grinding process.

[0015] In the present invention, the grinding chamber is conical and includes multiple length segments extending in a stepped manner, which to a certain extent reduces the degree of material accumulation at the bottom of the grinding chamber under the action of gravity, facilitates the classification and staged grinding to form materials with different particle sizes, and greatly improves the grinding efficiency and uniformity of the materials. In addition, the multiple length segments of the grinding chamber gradually narrow towards the discharge port, which further facilitates the classification and staged grinding to form materials with different particle sizes. Moreover, a hammer pressing ring is provided between two adjacent length segments of the grinding chamber, and the hammer pressing chamber formed by the hammer pressing ring and the stepped surface with variable diameter further restricts the downward accumulation of materials and provides conditions for the classification and staged grinding to form materials with different particle sizes.

[0016] In the grinding chamber of the present invention, each first grinding tooth extends along an arc, and a first groove extending in a spiral shape is formed between adjacent first grinding teeth. Each second grinding tooth extends along an arc, and a second groove extending in a spiral shape is formed between two adjacent second grinding teeth. The design is ingenious. When the inner cylinder and the outer cylinder rotate in opposite directions, the first groove guides the material to rise (or fall) in a spiral shape, and the second groove guides the material to fall (or rise) in a spiral shape. While kneading and crushing the material in this way, the material is continuously tumbled, effectively improving the uniformity of the grinding and crushing of the material and making the particle size of the material product relatively consistent. In addition, the arc openings of the first grinding teeth and the second grinding teeth are arranged opposite to each other, further enhancing the degree of gathering and tumbling of the material.

[0017] An air cushion layer is also formed on the inner wall surface of the outer cylinder of the present invention, which avoids the material tightly adhering to the inner wall of the outer cylinder under the action of centrifugal force, prevents the material from sticking to the wall or caking. At the same time, the blown gas can also impact the material therein, further mixing the material evenly, which is again beneficial to improving the grinding efficiency and particle size uniformity. Among them, a respirator is also provided at the exhaust port of the air passage chamber facing upward, which is beneficial to ensuring the stability of the air pressure in the grinding chamber and beneficial to ensuring the stable progress of the grinding and crushing process.

[0018] In the present invention, a cooling chamber is sleeved outside the air passage chamber, and the grinding chamber can be cooled by water cooling or air cooling, which can avoid the change of material properties caused by temperature rise and is beneficial to improving the qualified rate of grinding products.

[0019] In the present invention, the motor in the drive unit drives the inner cylinder and the outer cylinder to rotate eccentrically in opposite directions through a transmission mechanism. The inner cylinder is also fixedly connected to an eccentric shaft. By rotating the adjusting nut, the inner cylinder can be driven to move up and down relative to the outer cylinder. In this way, the sizes of the hammer pressing chamber and the grinding chamber can be adjusted to suit the grinding and crushing of materials with different particle size requirements, and the use is flexible. Description of the Drawings

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only one embodiment of the present invention. For those of ordinary skill in the art, without creative efforts, other implementation drawings can be obtained according to the provided drawings.

[0021] Figure 1 : Schematic three-dimensional structure diagram of the crushing unit in the present invention; Figure 2 : Schematic cross-sectional structure diagram of the crushing unit in the present invention; Figure 3 : Schematic three-dimensional cross-sectional structure diagram of the outer cylinder of the crushing unit; Figure 4 : Schematic three-dimensional structure diagram of the inner cylinder of the crushing unit; Figure 5 : Schematic three-dimensional structure diagram of the eccentric shaft; Figure 6 : Schematic three-dimensional structure diagram of the cooling pipe; Figure 7 : Figure 1 Schematic three-dimensional structure diagram of the crushing unit after removing the sleeve in ; Figure 8 : Schematic three-dimensional structure diagram of the grinding mill; Detailed implementation manners The following description and drawings fully illustrate the specific embodiments herein so that those skilled in the art can practice them. Parts and features of some embodiments may be included in or substituted for parts and features of other embodiments. The scope of the embodiments herein includes the entire scope of the claims and all available equivalents of the claims. Herein, the terms "first", "second", etc. are only used to distinguish one element from another, and do not require or imply any actual relationship or order between these elements. In fact, the first element can also be called the second element, and vice versa. Moreover, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a structure, device or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such structure, device or equipment. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the structure, device or equipment including the said element. The embodiments herein are described in a progressive manner, and the key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other.

[0022] As used herein, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present invention. In the description of the present invention, unless otherwise specified and defined, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, they can be mechanical connections or electrical connections, or the communication inside two elements. They can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0023] As used herein, unless otherwise specified, the term "plurality" means two or more.

[0024] As used herein, the character " / " indicates that the objects before and after are in an "or" relationship. For example, A / B means: A or B.

[0025] As used herein, the term "and / or" is an associative relationship describing an object, indicating that three relationships can exist. For example, A and / or B means: A or B, or, the three relationships of A and B.

[0026] As Figures 1 - 7 shown, an efficient pulverizing unit includes a cooling chamber 300, a gas passing chamber 100, an inner cylinder 2 and an outer cylinder 3 sleeved thereon; As Figure 1 shown, the outer cylinder 3 is sleeved outside the inner cylinder 2. The inner cylinder 2 and the outer cylinder 3 can eccentrically rotate in opposite directions under the action of an external driving unit. For example, the outer cylinder 3 rotates in the forward direction, the inner cylinder 2 rotates in the reverse direction, and the inner cylinder 2 eccentrically rotates relative to the outer cylinder 3; A conical grinding chamber 200 is formed between the inner cylinder 2 and the outer cylinder 3. The rotation of the inner cylinder 2 and the outer cylinder 3 in opposite directions causes the materials in the grinding chamber 200 to be rubbed and pulverized to a large extent, which is beneficial to improving the pulverizing efficiency and pulverizing uniformity. The inner cylinder 2 also eccentrically rotates relative to the outer cylinder 3. Thus, while rubbing and pulverizing the materials, the materials are repeatedly compressed and released, so that materials with different particle sizes are quickly mixed evenly. On the one hand, it can accelerate the material pulverizing speed and improve the pulverizing uniformity. On the other hand, it effectively avoids the blockage of the grinding chamber due to high viscosity of the materials, which is beneficial to ensuring the continuity of the pulverizing and grinding process. At the same time, the materials rotate at high speed under the action of the inner cylinder 2 and the outer cylinder 3 and are subjected to centrifugal force. The eccentric rotation process will not cause material leakage, and the design is ingenious.

[0027] As Figure 2As shown, the grinding chamber 200 communicates upward with the feed inlet 201, and the feed inlet 201 communicates upward with a horn-shaped hopper 204, which facilitates feeding. The materials entering the grinding chamber can be evenly dispersed in the grinding chamber 200 under the action of the inner cylinder 2 and the outer cylinder 3.

[0028] The grinding chamber 200 communicates downward with the discharge outlet 202. As Figure 2 shown, the discharge outlet 202 is annular, which facilitates uniform material discharge. The discharge outlet 202 can be connected downward to an aggregate cylinder, such as a detachable connection, which is convenient for receiving the materials after sizing.

[0029] As Figure 2 shown, the grinding chamber 200 includes a plurality of length segments extending stepwise downward. In this embodiment, it includes three length segments, which are arranged in a stepped manner. To a certain extent, it reduces the degree of material accumulation at the bottom of the grinding chamber under the action of gravity; in addition, the three length segments gradually narrow towards the discharge outlet direction, which facilitates the classification and staged grinding to form materials with different particle sizes. At the same time, during the grinding process, the materials are relatively evenly dispersed in the grinding chambers corresponding to the three length segments, greatly improving the grinding efficiency and uniformity of the materials. In other embodiments of the present invention, the grinding chamber 200 may also include two or more length segments.

[0030] In addition, a hammer pressing ring 4 is fixedly provided on the outer wall surface of the inner cylinder 2. The inner wall surface of the outer cylinder 3 includes a stepped diameter-changing surface 203 that connects adjacent two length segments. The end surface of the hammer pressing ring 4 facing the stepped diameter-changing surface 203 is an arc surface. When the inner cylinder 2 and the outer cylinder 3 rotate in opposite directions, the hammer pressing chamber formed by the hammer pressing ring 4 and the stepped diameter-changing surface 203 can crush the materials by extrusion. In addition, towards the discharge outlet 202 direction, the thickness of multiple hammer pressing chambers gradually decreases, which is also beneficial for classification and staged grinding. At the same time, to a certain extent, it reduces the accumulation of materials at the bottom of the grinding chamber under the action of gravity. The design is reasonable and is conducive to further improving the grinding efficiency and crushing uniformity of the materials. In addition, when the inner cylinder 2 rotates eccentrically relative to the outer cylinder 3, the hammer pressing ring 4 can push and release the materials gathered outside the hammer pressing ring 4 upward and downward, gradually releasing the materials while hammer pressing the materials, which is beneficial for ensuring uniform material discharge.

[0031] As Figures 2 - 4 shown, the grinding chamber 200 further includes a number of first grinding teeth 21 fixedly provided on the inner cylinder 2 and a number of second grinding teeth 31 fixedly provided on the outer cylinder 3. The first grinding teeth 21 and the second grinding teeth 31 cooperate with each other to crush the materials by extrusion. As Figure 3As shown, each first grinding tooth 21 extends along an arc, and two adjacent first grinding teeth 21 are arranged such that a first groove 211 extending in a spiral shape is formed between the two adjacent first grinding teeth 21; each second grinding tooth 31 extends along an arc, and a second groove 311 extending in a spiral shape is formed between two adjacent second grinding teeth 31. The design is ingenious. When the inner cylinder 2 and the outer cylinder 3 rotate in opposite directions, the setting of the first groove 211 guides the material to rise (or fall) in a spiral shape, and the setting of the second groove 311 guides the material to fall (or rise) in a spiral shape. In this way, while kneading and crushing the material, the material is continuously tumbled, effectively improving the uniformity of the grinding and crushing of the material, and making the particle size of the material product relatively consistent. In this embodiment, the first grinding teeth 21 and the second grinding teeth 31 are only arranged in the upper length section of the grinding cavity 200 for convenient processing; in other embodiments of the present invention, the first grinding teeth 21 and the second grinding teeth 31 can also be arranged in other length sections of the grinding cavity 200 to further improve the grinding efficiency and grinding uniformity.

[0032] As Figure 2 shown, the air passing cavity 100 is sleeved outside the outer cylinder 3. The air passing cavity 100 is laterally communicated with an air inlet 101, and the air inlet 101 is connected to an air pump through a pipeline. The air passing cavity 100 is communicated with the grinding cavity 200 through a plurality of through holes provided on the outer cylinder 3. In this embodiment, the opening of the through hole on the outer cylinder 3 avoids the second grinding tooth 31 for convenient processing, and the axis of the through hole extends along the horizontal tangent of the inner wall surface of the outer cylinder 3. In this way, when external air or inert gas enters the grinding cavity 200 through the through hole, it can spread and purge along the inner wall surface of the outer cylinder 3 in a conforming manner, "cleaning" the inner wall surface of the outer cylinder 3, avoiding material wall sticking or caking, overcoming the situation that the high-speed rotating material is pressed against the inner wall of the outer cylinder 3 under the action of centrifugal force, and then the wall sticking or caking is serious, and manual cleaning is time-consuming and laborious. For viscous materials, the self-cleaning effect is better.

[0033] As Figure 2 shown, the grinding cavity 200 is also communicated with an exhaust port 102 upward. In this embodiment, the exhaust port 102 is arranged away from the feed port 201, and a breather 5, also called a pressure equalizer, is provided at the exhaust port 102. The breather 5 is a prior art, and those skilled in the art can select it according to needs, which can ensure the stable air pressure in the grinding cavity 200, improve the use safety, and ensure the stable progress of the grinding and crushing process.

[0034] A cooling cavity 300 is further sleeved outside the air passing cavity 100. The cooling cavity 300 is communicated with a cooling inlet 301 and a cooling outlet 302 to cool the grinding cavity 200. In this embodiment, cooling water is used for cooling. The cooling inlet 301 is arranged near the lower end of the cooling cavity 300, and the cooling outlet 302 is arranged near the upper end of the cooling cavity 300. The cooling inlet 301 is connected to a water pump through a pipeline. In other embodiments of the present invention, air cooling can also be used for cooling.

[0035] In this embodiment, a cooling pipe 400 is sleeved in the inner cylinder 2. In this embodiment, the cooling pipe 400 is made of copper pipe. The cooling pipe 400 includes a length section that extends spirally and is close to the inner wall surface of the inner cylinder 2. The cooling is also carried out by the water-cooling method, and it is connected to the water outlet pipe of the water pump. In this way, the cooling effect can be further improved, the change of the material properties caused by the temperature rise can be avoided, and it is beneficial to improve the qualified rate of the grinding finished products.

[0036] In the present invention, as one of the implementation manners, the driving unit includes a motor, a transmission mechanism, and an eccentric shaft 6. The eccentric shaft 6 is coaxially and fixedly connected to the inner cylinder 2 downward. Among them, the eccentric shaft 6 is a hollow tubular structure, as Figure 5 shown; the inlet end and the outlet end of the cooling pipe 400 penetrate through the eccentric shaft 6 and extend out of the eccentric shaft 6, as Figure 6 shown, which is convenient for controlling the cooling pipe 600.

[0037] As Figure 2 shown, a sleeve 7 is fixedly provided above the cooling cavity 300. The sleeve 7 is sleeved outside the eccentric shaft 5. The sleeve 6 includes a fixedly arranged cover plate 71. The eccentric shaft 6 passes upward through the fixedly arranged cover plate 71, and the eccentric shaft 6 is rotationally connected to the cover plate 71 through an eccentric bearing 20. Among them, the housing forming the air passing cavity 100 and the cooling cavity 300 is fixedly connected to the sleeve 7 upward.

[0038] Among them, the transmission mechanism is designed to transmit the rotational motion of the motor main shaft to the inner cylinder 2 and the outer cylinder 3, that is, to drive the outer cylinder 3 to rotate forward, the inner cylinder 2 to rotate reversely, and the inner cylinder 2 to rotate eccentrically relative to the outer cylinder 3. Specifically, the transmission mechanism includes two eccentric bearings sleeved on the eccentric shaft 6, a first eccentric bearing 9 arranged near the middle section of the eccentric shaft 6, and a second eccentric bearing 10 arranged near the upper end of the eccentric shaft 6.

[0039] The motor bearing passes through the sleeve 7 laterally. The end of the output shaft of the motor is coaxially and fixedly connected with a second bevel gear 15. It also includes a first bevel gear 14 arranged below the second bevel gear 15 and meshing with the second bevel gear 15. The first bevel gear 14 is fixedly connected with a cylinder 16 downward.

[0040] The outer ring of the first eccentric bearing 9 is tightly fitted and sleeved in the cylinder 16 and fixedly connected with the cylinder 16. The first bevel gear 14 is horizontally placed. The output shaft of the motor transmits the rotational motion to the first bevel gear 14, as Figure 2 shown. The cylinder 16 is fixedly connected with the outer cylinder 3 through a connecting member. In this way, the forward rotational motion can be transmitted to the outer cylinder 3; as Figure 2 shown, the cylinder 16 is also rotationally connected with the sleeve 7 through a bearing 11.

[0041] It further includes a third bevel gear 12 disposed above the second bevel gear and meshing with the second bevel gear. The third bevel gear 12 is rotatably connected to the sleeve 7 through a bearing. The third bevel gear 12 is horizontally placed and disposed opposite to the first bevel gear 14. Thus, the output shaft of the motor transmits the rotational motion to the third bevel gear 12, and the third bevel gear 12 rotates in a direction opposite to that of the first bevel gear 14.

[0042] In addition, the transmission mechanism further includes a second eccentric gear transmission mechanism 13 that cooperates with each other. As Figure 2 described, the second eccentric gear transmission mechanism 13 includes a second toothed ring 131 and a second gear 132 that cooperates with the second toothed ring 131. The second toothed ring 131 is coaxially fixed to the third bevel gear 12. The second gear 132 is sleeved outside the eccentric shaft 6 and is coaxially fixed to the eccentric shaft 6. Thus, when the third bevel gear 12 rotates, it can drive the eccentric shaft 6 to rotate in the same direction and eccentrically.

[0043] A first spline (not shown) is sleeved at the position where the eccentric shaft 6 passes through the first eccentric bearing 9. A first spline sleeve (not shown) that cooperates with the first spline is fixed to the inner ring of the first eccentric bearing 9.

[0044] The outer ring of the second eccentric bearing 10 is fixed to the upper end of the sleeve 7. A second spline sleeve (not shown) is fixed to the inner ring of the second eccentric bearing 10. A second spline sleeve (not shown) that cooperates with the second spline sleeve is fixed to the eccentric shaft 6 corresponding to the position of the second eccentric bearing 10.

[0045] In addition, an adjusting nut 8 is sleeved on the part of the eccentric shaft 6 extending outside the cover plate 71. The adjusting nut 8 is screwed to the eccentric shaft 6 and abuts against the cover plate 71 downward. Thus, the inner cylinder 2 is connected to the outer cylinder 3 in a vertically displaceable manner. When the adjusting nut 8 is rotated, the eccentric shaft 6 can slide up and down relative to the sleeve 7. Thus, the inner cylinder 2 can be displaced up and down relative to the outer cylinder 3. Thus, the sizes of the hammering chamber and the grinding chamber 200 can be adjusted to suit the crushing and grinding of materials with different particle size requirements, and it is flexible to use.

[0046] A grinding and pulverizing machine, as Figure 8 shown, includes a frame 1. The frame 1 is provided with the high-efficiency crushing unit as described above. In addition, a relatively sealed box cavity is also provided on the frame 1. The motor, water pump and air pump are disposed in the box cavity.

[0047] The present invention has been described above by way of example, but the present invention is not limited to the above specific embodiments. Any modification or variation based on the present invention falls within the scope of protection required by the present invention.

Claims

1. An efficient crushing unit, characterized in that, It includes an air passing cavity (100), a sleeved inner cylinder (2) and an outer cylinder (3); The inner cylinder (2) and the outer cylinder (3) can eccentrically rotate in opposite directions under the action of an external driving unit; A conical grinding cavity (200) is formed between the inner cylinder (2) and the outer cylinder (3). The grinding cavity (200) communicates with a feed inlet (201) upward and a discharge outlet (202) downward. The grinding cavity (200) includes a plurality of length segments extending step by step downward, and the grinding cavity (200) includes a number of first grinding teeth (21) fixed on the inner cylinder (2) and a number of second grinding teeth (31) fixed on the outer cylinder (3). The first grinding teeth (21) and the second grinding teeth (31) are used for squeezing and crushing materials; The air passing cavity (100) is sleeved outside the outer cylinder (3). The air passing cavity (100) is communicated with an air inlet (101), and the air passing cavity (100) is communicated with the grinding cavity (200) through a number of through holes provided on the outer cylinder (3). When external air or inert gas enters the grinding cavity (200) through the through holes, an air cushion layer can be formed on the inner wall surface of the outer cylinder (3) to prevent materials from sticking to the wall or caking.

2. The high-efficiency crushing unit according to claim 1, wherein The first grinding teeth (21) extend along an arc, and a first groove (211) extending in a spiral shape is formed between two adjacent first grinding teeth (21); the second grinding teeth (22) avoid the first grinding teeth (21) and extend along an arc, and the arc openings of the first grinding teeth (21) and the second grinding teeth (22) face in opposite directions. A second groove (221) in a spiral shape with a rotation direction opposite to that of the first groove (211) is formed between two adjacent second grinding teeth (22).

3. The high-efficiency crushing unit according to claim 2, wherein, The multiple length segments of the grinding cavity (200) gradually narrow towards the discharge outlet (202) to crush and grind materials step by step.

4. The high-efficiency crushing unit according to claim 2, characterized in that, A hammer pressing ring (4) is fixed on the outer wall surface of the inner cylinder (2). The inner wall surface of the outer cylinder (3) includes a stepped diameter-changing surface (203) connecting two adjacent length segments. The hammer pressing cavity formed by the hammer pressing ring (4) and the stepped diameter-changing surface (203) can squeeze and crush materials, and the thickness of multiple hammer pressing cavities gradually decreases towards the discharge outlet (202).

5. The high-efficiency crushing unit according to claim 5, characterized in that, The inner cylinder (2) is connected to the outer cylinder (3) in a vertically displaceable manner.

6. The high-efficiency crushing unit according to any one of claims 2 to 5, characterized in that, The opening of the through hole on the outer cylinder (3) avoids the second grinding teeth (31), and the axis of the through hole extends along the horizontal tangent of the inner wall surface of the outer cylinder (3).

7. The high-efficiency crushing unit according to claim 6, characterized in that, The grinding cavity (200) is also communicated with an exhaust port (102) upward. The exhaust port (102) is arranged away from the feed inlet (201), and a respirator (5) is provided at the exhaust port (102).

8. The high-efficiency crushing unit according to claim 6, characterized in that A cooling cavity (300) is further sleeved outside the air passing cavity (100). The cooling cavity (300) is communicated with a cooling inlet (301) and a cooling outlet (302) to cool the grinding cavity (300).

9. The high-efficiency crushing unit according to claim 6, wherein, It further includes a driving unit, the driving unit includes a motor, a transmission mechanism and an eccentric shaft (6), the eccentric shaft (6) is coaxially and fixedly connected to the inner cylinder (2) downward, the transmission mechanism is designed to transmit the rotational motion of the main shaft of the motor to the inner cylinder (2) and the outer cylinder (3), drive the outer cylinder (3) to rotate forward, the inner cylinder (2) to rotate reversely and the inner cylinder (2) to rotate eccentrically relative to the outer cylinder (3), the eccentric shaft (6) passes upward through the fixedly arranged cover plate (71) and is rotatably connected to the cover plate (71) through an eccentric bearing (20), a regulating nut (8) is sleeved on the part of the eccentric shaft (6) extending outside the cover plate (71), the regulating nut (8) is screwed with the eccentric shaft (6) and abuts against the cover plate (71) downward.

10. A grinding and pulverizing machine, characterized in that, It includes a frame (1), and the high-efficiency crushing unit as described in any one of claims 1 to 5, 7 to 9 is provided on the frame (1).

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