Feeding device for thin film granulation

Abstract

The utility model discloses a feeding device for film granulation, which comprises a feeding cylinder and a material distributing chamber, the material distributing chamber is connected to the bottom of the feeding cylinder, the material distributing chamber is communicated with the inner space of the feeding cylinder, the material distributing chamber comprises a motor II, a rotating shaft and a material distributing roller, the motor II is positioned outside the material distributing chamber, and the rotating shaft is positioned outside the material distributing roller. The rotating shaft is rotationally installed in the material distribution chamber, the material distribution roller is fixedly arranged on the peripheral face of the rotating shaft in a sleeving mode, the second motor is connected with the rotating shaft so as to be suitable for driving the rotating shaft to rotate in the material distribution chamber, and at least two material distribution grooves which are evenly distributed in the circumferential direction are formed in the material distribution roller. Raw materials in the device are quantitatively and orderly fed into the granulator in batches through intermittent material distribution, so that a better feeding effect is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of granulation production equipment, in particular to a feeding device for film granulation. Background Art

[0002] Currently, in the production process of film granulation, raw materials need to enter the granulator through a feeding device for processing. However, existing feeding devices often have deficiencies in material discharge control. Due to the lack of precise control mechanism, more raw materials may directly and excessively enter the granulator, which will lead to a series of problems.

[0003] After searching, it was found that the Chinese utility model with authorization announcement number CN205997202U discloses a feeding device for film granulation. This patent achieves precise control of material supply by adding auxiliary functions such as motors, reduces the risk of blockage, improves work efficiency, and ensures the normal operation of plastic granulation and the life of the equipment; however, this patent can only perform anti-blocking treatment on the interior of the feeding device, but cannot control the discharge. A one-time influx into the interior of the granulator will cause blockage inside the granulator and uneven mixing of raw materials, so uniform and orderly feeding cannot be achieved. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the defects in the prior art, and the raw materials in the device are quantitatively and orderly fed into the granulator in batches through an intermittent material distribution setting, thereby achieving a better feeding effect.

[0005] In order to solve the above technical problems, the technical solution of the utility model is a feeding device for film granulation, comprising:

[0006] Feeding barrel;

[0007] A material distribution chamber, the material distribution chamber is connected to the bottom of the feeding barrel, and the material distribution chamber is communicated with the internal space of the feeding barrel;

[0008] The material distribution chamber includes a second motor, a rotating shaft and a material distribution roller;

[0009] The second motor is located outside the material distribution chamber, the rotating shaft is rotatably installed inside the material distribution chamber, and the material distribution roller is fixedly sleeved on the outer circumference of the rotating shaft;

[0010] The second motor is connected to the rotating shaft to drive the rotating shaft to rotate in the material distributing chamber;

[0011] The material distribution roller is provided with at least two material distribution grooves which are evenly distributed around the circumference.

[0012] Furthermore, the material distributing chamber is provided with an auxiliary component, which includes a feeding roller, a rotating rod and a driving device;

[0013] The rotating rod is rotatably mounted inside the material distribution chamber, the unloading roller is fixedly sleeved on the outer circumference of the rotating rod, and the unloading roller is located above the material distribution roller;

[0014] The unloading roller is provided with an unloading trough;

[0015] The driving device is suitable for driving the unloading roller to rotate synchronously with the dividing roller until the unloading trough is aligned with one of the dividing troughs.

[0016] Furthermore, the driving device includes a driving gear and a driven gear;

[0017] The driving gear is fixedly sleeved on the outer circumference of the rotating shaft, and the driven gear is fixedly sleeved on the outer circumference of the rotating rod, and the driving gear and the driven gear are meshed;

[0018] The driven gears are all full-tooth gears.

[0019] Furthermore, the driving gear is a full-tooth gear.

[0020] Furthermore, a groove and a meshing surface are provided on the driving gear along the circumferential direction, and the meshing surface and the groove are spaced apart;

[0021] The meshing surface meshes with the driven gear.

[0022] Furthermore, the auxiliary component further includes a reset component, the reset component includes a reset spring, and the reset spring is adapted to drive the unloading roller to reverse and reset when the meshing surface is not meshed with the driven gear under the rotation of the driving gear;

[0023] The return spring is sleeved on the outside of the rotating rod, and the two ends of the return spring are respectively connected to one side of the driven gear and the inner wall of the distributing chamber.

[0024] Furthermore, a stirring assembly is provided in the feeding barrel, and the stirring assembly includes a motor 1, a stirring rod and a stirring blade;

[0025] The motor 1 is located outside the feeding barrel, the stirring rod is rotatably installed in the feeding barrel, and the stirring blade is fixedly sleeved on the outer circumference of the stirring rod;

[0026] The motor 1 is connected to the stirring rod to drive the stirring rod to rotate in the feeding barrel, thereby driving the stirring blade to rotate.

[0027] Furthermore, a cleaning assembly is provided on the outer peripheral surface of the stirring rod, and the cleaning assembly includes a connecting rod and a cleaning block;

[0028] The connecting rod is fixedly connected to the outer circumference of the stirring rod, and the cleaning block is fixedly connected to one end of the connecting rod;

[0029] The cleaning block is in contact with the inner wall of the feed barrel;

[0030] The cleaning block is adapted to rotate along with the stirring rod to scrape the inner wall of the feeding cylinder.

[0031] Furthermore, the cleaning block includes a scraping portion, a guide surface and a baffle.

[0032] The scraping portion contacts the inner wall of the feeding cylinder;

[0033] The baffle is connected to the cleaning block. A through slot running through the cleaning block is provided in the cleaning block. The through slot is located between the guide surface and the baffle.

[0034] Furthermore, the inlet of the feed cylinder is connected to a crushing chamber, which includes a motor 3, two driving gears and two crushing rollers;

[0035] The motor 3 and the two driving gears are all located outside the pulverizing chamber, and the two pulverizing rollers are both rotatably mounted inside the pulverizing chamber;

[0036] The two driving gears are both rotatably mounted on the crushing chamber, the two driving gears are meshed with each other, and the motor 3 is connected to one of the driving gears to drive the two driving gears to rotate in opposite directions;

[0037] The two driving gears are connected to the two crushing rollers respectively, and the two driving gears are suitable for driving the corresponding crushing rollers to rotate respectively.

[0038] By adopting the above technical solution, the utility model has the following beneficial effects:

[0039] 1. Through the arrangement of the dividing roller and the dividing trough and other structures, the dividing roller is arranged at the outlet of the feeding device, and the raw materials in the feeding device are divided into the dividing trough by driving the dividing roller to rotate, and then sent out of the interior of the feeding device following the rotation of the dividing roller.

[0040] 2. Through the setting of the unloading roller and other structures in the auxiliary components, the unloading roller is set between the dividing roller and the inner cavity of the feeding device. The unloading trough on the unloading roller first introduces part of the raw materials and then rotates to transmit them to the dividing roller. The setting of double rollers ensures the stable operation of the system. Even under high load or material changes, it can maintain a stable material flow and delivery speed, and avoids the problem of multiple dividing troughs on a single dividing roller being stuck by the raw materials when continuously rotating to discharge materials. The unloading roller can be prepared to receive the materials in advance.

[0041] 3. The setting of the reset spring and intermittent driving gear and other structures reduces the continuous meshing time between the two rollers, thereby reducing the wear rate of the gears, which helps to extend the service life of the equipment and reduce maintenance costs. At the same time, the reset spring can drive the unloading roller to reset at the moment when the two gears are not engaged, and continue the material receiving work, thereby improving work efficiency.

[0042] 4. Through the setting of structures such as cleaning blocks, while the stirring rod and stirring blades drive the flow of raw materials in the feed barrel, the cleaning blocks scrape the inner wall of the feed barrel to prevent some raw materials from sticking to the inner wall, making it impossible to discharge the material normally and affecting the subsequent feeding of other raw materials.

[0043] 5. Through the setting of the crushing chamber and other structures, the raw materials are crushed again by two crushing rollers before entering the feed barrel. The pre-treated raw materials will make the entire feeding process smoother. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0045] Figure 2 This is a schematic diagram of the internal structure of the feed barrel and the distribution chamber of the utility model;

[0046] Figure 3 This is a top view of the internal structure of the feed barrel of the present utility model;

[0047] Figure 4 For the utility model Figure 3 Enlarged view of point A in the middle;

[0048] Figure 5 This is a schematic diagram of the transmission structure of the material distribution roller of the utility model;

[0049] Figure 6 This is a schematic diagram of the transmission structure of the unloading roller of the utility model.

[0050] In the figure: 1, feeding barrel; 11, motor 1; 12, stirring rod; 13, stirring blade;

[0051] 2. Material distribution chamber; 21. Motor 2; 22. Rotating shaft; 23. Material distribution roller;

[0052] 3. Crushing chamber; 31. Motor 3; 32. Driving gear; 33. Crushing roller;

[0053] 4. Cleaning assembly; 41. Connecting rod; 42. Cleaning block; 43. Scraping portion; 44. Guide surface; 45. Baffle; 46. Through slot;

[0054] 5. Auxiliary component; 51. Rotating rod; 52. Return spring; 53. Unloading roller; 54. Driving gear; 55. Meshing surface; 56. Groove; 57. Driven gear. DETAILED DESCRIPTION

[0055] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments in conjunction with the accompanying drawings.

[0056] Example 1

[0057] like Figure 1 、 Figure 4 As shown, the feeding device for film granulation comprises:

[0058] Feeding cylinder 1;

[0059] The material distribution chamber 2 is connected to the bottom of the feeding barrel 1, and the material distribution chamber 2 is communicated with the internal space of the feeding barrel 1;

[0060] The material distribution chamber 2 includes a second motor 21, a rotating shaft 22 and a material distribution roller 23;

[0061] The second motor 21 is located outside the material distribution chamber 2, the rotating shaft 22 is rotatably mounted inside the material distribution chamber 2, and the material distribution roller 23 is fixedly sleeved on the outer peripheral surface of the rotating shaft 22;

[0062] The second motor 21 is connected to the rotating shaft 22 to drive the rotating shaft 22 to rotate in the material distribution chamber 2;

[0063] The material distribution roller 23 is provided with at least two material distribution grooves evenly distributed around the circumference.

[0064] like Figure 5-6 As shown, an auxiliary component 5 is provided in the material distribution chamber 2, and the auxiliary component 5 includes a material discharge roller 53, a rotating rod 51 and a driving device;

[0065] The rotating rod 51 is rotatably mounted inside the material distribution chamber 2, and the unloading roller 53 is fixedly sleeved on the outer peripheral surface of the rotating rod 51, and the unloading roller 53 is located above the material distribution roller 23;

[0066] The unloading roller 53 is provided with an unloading trough;

[0067] The driving device is suitable for driving the unloading roller 53 to rotate synchronously with the dividing roller 23 until the unloading trough is aligned with one of the dividing troughs.

[0068] like Figure 5-6 As shown, the driving device includes a driving gear 54 and a driven gear 57;

[0069] The driving gear 54 is fixedly sleeved on the outer circumference of the rotating shaft 22, and the driven gear 57 is fixedly sleeved on the outer circumference of the rotating rod 51, and the driving gear 54 and the driven gear 57 are meshed;

[0070] The driven gears 57 are all fully toothed.

[0071] like Figure 5-6 As shown, the driving gear 54 is a full-tooth gear.

[0072] like Figure 5-6 As shown, a groove 56 and a meshing surface 55 are provided on the driving gear 54 along the circumferential direction, and the meshing surface 55 and the groove 56 are arranged at intervals;

[0073] The meshing surface 55 meshes with the driven gear 57 .

[0074] like Figure 6 As shown, the auxiliary assembly 5 further includes a reset assembly, which includes a reset spring 52. The reset spring 52 is adapted to drive the unloading roller 53 to reverse and reset when the lower meshing surface 55 of the driving gear 54 is not engaged with the driven gear 57;

[0075] The return spring 52 is sleeved on the outside of the rotating rod 51 , and two ends of the return spring 52 are respectively connected to one side of the driven gear 57 and the inner wall of the distributing chamber 2 .

[0076] The working principle of this embodiment is as follows:

[0077] When in use, the raw materials for granulation are first put into the crushing chamber 3 for crushing, and then enter the feeding cylinder 1 after crushing, and finally discharged from the inside of the feeding device through the distribution chamber 2 in a quantitative and graded manner, and then enter the granulator for subsequent work;

[0078] Inside the distributing chamber 2, the processed raw material part will enter the distributing trough in the distributing roller 53, and the starting motor 21 will drive the rotating shaft 22 to rotate, and the rotating shaft 22 will drive the distributing roller 23 to rotate. When the rotating shaft 22 rotates, the driving gear 54 will also rotate. When the driving gear 54 rotates, its meshing surface 55 will mesh with the driven gear 57, thereby driving the rotation of the driven gear 57, and then driving the distributing roller 53 to rotate. The rotating distributing roller 53 will align the distributing trough with the distributing trough on the distributing roller 23, thereby pouring the raw material in the distributing trough into the inside of the distributing trough, and finally the distributing roller 23 that continues to rotate will discharge the raw material in the distributing trough;

[0079] It should be noted that the gear ratio between the driving gear 54 and the driven gear 57 is determined by the number of the material troughs. Since the number of the material troughs is greater than the number of the discharge troughs, in order to ensure that the discharge trough can effectively pour the raw materials into each material trough, each time the driving gear 54 rotates to the corresponding material trough vertically upward, the discharge roller 53 must rotate 180 degrees to rotate the discharge trough downward to dock with the material trough.

[0080] like Figure 5-6As shown, three material distribution grooves are provided on the distribution roller 23, so three corresponding meshing surfaces 55 are provided on the driving gear 54, and a groove 56 is separated between each meshing surface 55. Every time the distribution roller 23 rotates one-third of a circle, one of the distribution grooves will be located in the vertical upward position. In this process, the meshing surface 55 and the driven gear 57 are engaged, which will cause the material distribution groove to rotate 180° downward and dock with the distribution groove to realize the transfer of raw materials. Subsequently, the driving gear 54 continues to rotate. At this time, the driven gear 57 loses the meshing force due to the groove 56. The return spring 52, which was originally twisted due to the rotation of the rotating rod 51, will drive the rotating rod 51 to reset under the restriction of losing the meshing force, thereby realizing the reset of the material distribution roller 53. At this time, the material distribution groove returns to its original vertical upward state, and the distribution roller 23 keeps rotating. When it rotates to the next meshing surface 55 and meshes with the driven gear 57, the above action is repeated, thereby realizing continuous and stable discharging.

[0081] The dual arrangement of the unloading roller 53 and the dividing roller 23 makes the entire unloading process more stable and improves the load-bearing capacity. After each cooperation between the unloading trough and the dividing trough, the unloading trough will be reset in advance to prepare for the next handover, avoiding the phenomenon that the dividing roller 23 is stuck and cannot rotate due to the continuous rotation of the single roller 23.

[0082] Moreover, by adjusting the rotation speed of the two rollers, the size of the slots and the matching relationship of the gears, it can adapt to materials of different types and sizes and can be widely used in the granulation feeding of various raw materials. At the same time, since the design of the intermittent gear allows adjustment of the feeding interval time and the amount of each feeding, the feeding amount of the system can be flexibly adjusted according to actual production needs.

[0083] Example 2

[0084] like Figure 2 As shown, this embodiment further includes the following structures on the basis of the embodiment 1: a stirring assembly is provided in the feeding barrel 1, and the stirring assembly includes a motor 11, a stirring rod 12 and a stirring blade 13;

[0085] The motor 11 is located outside the feeding barrel 1, the stirring rod 12 is rotatably installed in the feeding barrel 1, and the stirring blade 13 is fixedly sleeved on the outer peripheral surface of the stirring rod 12;

[0086] The motor 11 is connected to the stirring rod 12 to drive the stirring rod 12 to rotate in the feeding barrel 1, thereby driving the stirring blade 13 to rotate.

[0087] like Figure 2-3 As shown, a cleaning assembly 4 is provided on the outer peripheral surface of the stirring rod 12, and the cleaning assembly 4 includes a connecting rod 41 and a cleaning block 42;

[0088] The connecting rod 41 is fixedly connected to the outer peripheral surface of the stirring rod 12, and the cleaning block 42 is fixedly connected to one end of the connecting rod 41;

[0089] The cleaning block 42 is in contact with the inner wall of the feed barrel 1;

[0090] The cleaning block 42 is adapted to rotate along with the stirring rod 12 to scrape the inner wall of the feeding cylinder 1 .

[0091] like Figure 4 As shown, the cleaning block 42 includes a scraping portion 43, a guide surface 44 and a baffle 45.

[0092] The scraping portion 43 contacts the inner wall of the feed barrel 1;

[0093] The baffle 45 is connected to the cleaning block 42 . A through slot 46 is defined in the cleaning block 42 and passes through the cleaning block 42 . The through slot 46 is located between the guide surface 44 and the baffle 45 .

[0094] like Figure 1 As shown, the inlet of the feed cylinder 1 is connected to a crushing chamber 3, which includes a motor 31, two driving gears 32 and two crushing rollers 33;

[0095] The motor 31 and the two driving gears 32 are all located outside the crushing chamber 3, and the two crushing rollers 33 are both rotatably mounted inside the crushing chamber 3;

[0096] The two driving gears 32 are both rotatably mounted on the grinding chamber 3, the two driving gears 32 are meshed with each other, and the motor 31 is connected to one of the driving gears 32 to drive the two driving gears 32 to rotate in opposite directions;

[0097] The two driving gears 32 are connected to the two crushing rollers 33 respectively, and the two driving gears 32 are suitable for driving the corresponding crushing rollers 33 to rotate respectively.

[0098] The working principle of this embodiment is as follows:

[0099] A stirring assembly is provided inside the feed barrel 1. After the raw materials enter the feed barrel 1, the stirring rod 12 and the stirring blade 13 are driven by starting the motor 11 to stir the raw materials inside the feed barrel 1, thereby promoting the movement of the raw materials, making the feeding process smoother and preventing the raw materials from sticking to each other and to the inner wall of the feed barrel 1.

[0100] Due to the different characteristics of different raw materials, the difference in ambient humidity and temperature will cause some raw materials to stick to the inner wall of the feed barrel 1. Failure to remove the raw materials stuck on the inner wall in time will lead to unsmooth feeding and affect the normal entry of subsequent raw materials. When other raw materials need to be fed, two different materials will be intertwined. Therefore, while the stirring rod 12 and the stirring blade 13 are stirring the raw materials, they will also drive the rotation of the connecting rod 41 and the cleaning block 42. The scraping portion 43 of the cleaning block 42 will continuously perform a process on the inner wall of the feed barrel 1 to The raw materials sticking to the inner wall are scraped off. When encountering raw materials with higher viscosity, the scraped raw materials will stick to the scraping portion 43 and accumulate more and more. After accumulating too much, the material will be squeezed along the guide surface 44 until it is squeezed to the baffle 45. At this time, if the sticky raw materials have not fallen off, they will continue to be squeezed. Since the baffle 45 is the extreme position, the continuously squeezed raw materials will continue to move through the through groove 46 on the cleaning block 42. When they lose sufficient support in the through groove 46, they will fall due to the centrifugal force generated by the rotation of the connecting rod 41 and their own gravity, thereby solving the problem of raw materials sticking to the inner wall.

[0101] At the same time, at the front end of the entire equipment, a crushing assembly is also provided in the crushing chamber 3 where the raw materials first enter. By starting the motor 31, the two drive gears 32 are driven to rotate in opposite directions, and then the two crushing rollers 33 are driven to rotate in opposite directions, so as to further crush the incoming raw materials. The crushed raw materials will be smoother in the subsequent unloading work.

[0102] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A feeding device for film granulation, characterized in that: include: Feeding barrel (1); A material distribution chamber (2), the material distribution chamber (2) is connected to the bottom of the feeding barrel (1), and the material distribution chamber (2) is communicated with the internal space of the feeding barrel (1); The material distribution chamber (2) includes a second motor (21), a rotating shaft (22) and a material distribution roller (23); The second motor (21) is located outside the material distribution chamber (2), the rotating shaft (22) is rotatably mounted inside the material distribution chamber (2), and the material distribution roller (23) is fixedly sleeved on the outer peripheral surface of the rotating shaft (22); The second motor (21) is connected to the rotating shaft (22) so as to be suitable for driving the rotating shaft (22) to rotate in the distributing chamber (2); The material distribution roller (23) is provided with at least two material distribution grooves evenly distributed around the circumference.

2. The feeding device for film granulation according to claim 1, characterized in that An auxiliary component (5) is provided in the material distribution chamber (2), and the auxiliary component (5) includes a discharge roller (53), a rotating rod (51) and a driving device; The rotating rod (51) is rotatably mounted inside the material distribution chamber (2), and the unloading roller (53) is fixedly sleeved on the outer peripheral surface of the rotating rod (51), and the unloading roller (53) is located above the material distribution roller (23); The unloading roller (53) is provided with an unloading trough; The driving device is suitable for driving the unloading roller (53) to rotate synchronously with the dividing roller (23) until the unloading trough is aligned with one of the dividing troughs.

3. The feeding device for film granulation according to claim 2, characterized in that: The driving device includes a driving gear (54) and a driven gear (57); The driving gear (54) is fixedly sleeved on the outer circumference of the rotating shaft (22), and the driven gear (57) is fixedly sleeved on the outer circumference of the rotating rod (51), and the driving gear (54) and the driven gear (57) are meshed with each other; The driven gears (57) are all fully toothed.

4. The feeding device for film granulation according to claim 3, characterized in that: The driving gear (54) is a full-tooth gear.

5. The feeding device for film granulation according to claim 3, characterized in that: A groove (56) and a meshing surface (55) are provided on the driving gear (54) along the circumferential direction, and the meshing surface (55) and the groove (56) are spaced apart. The meshing surface (55) meshes with the driven gear (57).

6. The feeding device for film granulation according to claim 5, characterized in that: The auxiliary component (5) further includes a reset component, the reset component including a reset spring (52), the reset spring (52) being adapted to drive the unloading roller (53) to reverse and reset when the meshing surface (55) is not meshed with the driven gear (57) when the driving gear (54) rotates; The return spring (52) is sleeved on the outside of the rotating rod (51), and the two ends of the return spring (52) are respectively connected to one side of the driven gear (57) and the inner wall of the distributing chamber (2).

7. The feeding device for film granulation according to claim 1, characterized in that: A stirring assembly is provided in the feeding barrel (1), and the stirring assembly includes a motor (11), a stirring rod (12) and a stirring blade (13); The motor 1 (11) is located outside the feeding barrel (1), the stirring rod (12) is rotatably mounted inside the feeding barrel (1), and the stirring blade (13) is fixedly sleeved on the outer peripheral surface of the stirring rod (12); The motor 1 (11) is connected to the stirring rod (12) so as to be suitable for driving the stirring rod (12) to rotate in the feeding barrel (1), thereby driving the stirring blade (13) to rotate.

8. The feeding device for film granulation according to claim 7, characterized in that: A cleaning assembly (4) is provided on the outer peripheral surface of the stirring rod (12), and the cleaning assembly (4) includes a connecting rod (41) and a cleaning block (42); The connecting rod (41) is fixedly connected to the outer peripheral surface of the stirring rod (12), and the cleaning block (42) is fixedly connected to one end of the connecting rod (41); The cleaning block (42) is in contact with the inner wall of the feeding barrel (1); The cleaning block (42) is adapted to rotate along with the stirring rod (12) to scrape the inner wall of the feeding cylinder (1).

9. The feeding device for film granulation according to claim 8, characterized in that: The cleaning block (42) includes a scraping portion (43), a guide surface (44) and a baffle (45). The scraping portion (43) contacts the inner wall of the feeding cylinder (1); The baffle (45) is connected to the cleaning block (42). A through slot (46) running through the cleaning block (42) is provided in the cleaning block (42). The through slot (46) is located between the guide surface (44) and the baffle (45).

10. The feeding device for film granulation according to claim 9, characterized in that: The inlet of the feeding cylinder (1) is connected to a crushing chamber (3), and the crushing chamber (3) includes a third motor (31), two driving gears (32) and two crushing rollers (33); The motor 3 (31) and the two driving gears (32) are both located outside the pulverizing chamber (3), and the two pulverizing rollers (33) are both rotatably mounted inside the pulverizing chamber (3); The two driving gears (32) are both rotatably mounted on the crushing chamber (3), the two driving gears (32) are meshed with each other, and the motor (31) is connected to one of the driving gears (32) to drive the two driving gears (32) to rotate in opposite directions; The two driving gears (32) are respectively connected to the two crushing rollers (33), and the two driving gears (32) are suitable for respectively driving the corresponding crushing rollers (33) to rotate.

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