Raw material grinding device and grinding method thereof

Abstract

The present invention relates to a raw material grinding apparatus and a grinding method thereof, the raw material grinding apparatus comprising: a middle grinding body communicating a raw material source and an air source; the upper grinding body is communicated with the upper end of the middle grinding body; the lower grinding body is communicated with the lower end of the middle grinding body; the recycling mechanism is arranged at an outlet of the upper grinding body; wherein an annular first channel is formed in the middle grinding body, and gas and raw materials are configured to flow along the first channel for grinding; a second channel diffusing from top to bottom is formed in the upper grinding body and the lower grinding body; a lower grinding piece is arranged in the middle of the second channel in the lower grinding body, and raw materials act on the lower grinding piece when falling down along the lower grinding body. The problems that in an existing scheme, the next batch of raw materials can be ground only after the current batch of raw materials are ground, the grinding efficiency is low, the granularity difference of the ground raw materials is large, and the grinding quality is affected are solved.

Description

Technical Field

[0001] The present invention relates to the field of grinding devices, and in particular to a raw material grinding device and a grinding method thereof. Background Art

[0002] In textile production, various raw materials need to be ground, including raw materials for printing and dyeing, fiber raw materials for textile production, and additive raw materials in the textile process. All these raw materials need to be ground to make the raw material particles finer.

[0003] Traditional grinding methods are divided into gas grinding and mechanical grinding. In gas grinding, gas drives the raw materials into the grinding shell, and the gas drives the raw materials to act on the inner surface of the grinding shell for grinding. In mechanical grinding, an electric motor drives a grinding disc to rotate, and the grinding disc and the grinding shell act together on the raw materials for grinding.

[0004] The above grinding methods can only grind large quantities of raw materials in batches. Only after the current batch of raw materials is ground can the next batch be ground, resulting in low grinding efficiency. Since the current batch of raw materials is ground uniformly, the particle size of the ground raw materials varies greatly, thus affecting the quality of raw material grinding.

[0005] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present disclosure, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0006] Aiming at the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a raw material grinding device and a grinding method thereof, so as to solve the problems in the prior art that only after the current batch of raw materials is ground can the next batch be ground, resulting in low grinding efficiency and large differences in the particle size of the ground raw materials, which affect the grinding quality.

[0007] To achieve the above purpose, the technical solution of the present invention is as follows:

[0008] A raw material grinding device;

[0009] Comprising: a middle grinding body, connecting a raw material source and a gas source; an upper grinding body, connected to the upper end of the middle grinding body; a lower grinding body, connected to the lower end of the middle grinding body; a recovery mechanism, arranged at the outlet of the upper grinding body;

[0010] Wherein, an annular first channel is formed in the middle grinding body, and gas and raw materials are configured to flow along the first channel for grinding; a second channel that diffuses from top to bottom is formed in the upper grinding body and the lower grinding body; a lower grinding member is arranged at the middle position of the second channel in the lower grinding body, and the raw materials act on the lower grinding member when falling along the lower grinding body.

[0011] A further technical solution is that the middle grinding body includes: a middle inner body, a middle grinding plate arranged around the first channel, a feed cylinder obliquely communicating with the upper end of the first channel, and an injector arranged on the feed cylinder; wherein, the injector generates gas to drive raw materials into the first channel, and the raw materials act on the grinding plate for grinding.

[0012] A further technical solution is that an outer middle body is arranged around the first channel outside the middle inner body; an inclined channel is formed obliquely around the first channel; a sandwich layer communicating with the gas source is formed between the middle inner body and the outer middle body, and the inclined channel communicates with the sandwich layer.

[0013] A further technical solution is that the upper grinding body includes: a first driving device and grinding rings stacked along the moving direction of the raw materials; wherein, a flow space is formed inside the grinding rings, and the diameter of the flow space gradually decreases along the moving direction of the raw materials; the first driving device drives adjacent grinding rings to rotate in opposite directions; ring blocks are arranged side by side around the grinding rings, and the ring blocks on adjacent grinding rings contact and grind the raw materials.

[0014] A further technical solution is that the lower grinding body includes: a second driving device, a conical cylinder, a conical part rotatably arranged on the conical cylinder, and acting parts arranged side by side around the lower grinding part; wherein, the acting parts bend and extend towards the conical cylinder; the second driving device drives the lower grinding part to rotate, and the acting parts act on the raw materials towards the conical part.

[0015] A further technical solution is that the recovery mechanism includes: a main pipe communicating with the upper grinding body, side pipes arranged side by side and communicating with the main pipe, and filter bags communicating with the outlets of the side pipes; wherein, the side pipes are horizontally arranged.

[0016] A grinding method of a raw material grinding device includes the following steps:

[0017] Grinding and separating step: Raw materials and gas are introduced into the middle grinding body; the gas and raw materials flow along the first channel, and the grinding plate grinds the raw materials to form fine particles and coarse particles; the fine particles are driven by the gas into the upper grinding body, and the coarse particles fall into the lower grinding body due to their own weight;

[0018] Circular grinding step: The second driving device drives the lower grinding part to rotate, and the coarse particles are broken when contacting the acting parts or act on the conical part; the conical part grinds the coarse particles to form fine particles, and the fine particles enter the upper grinding body under the action of the gas;

[0019] Re-grinding step: The first driving device drives adjacent grinding rings to rotate in opposite directions, and the adjacent grinding rings grind the fine particles to form fine powder, and the fine powder is discharged under the drive of the gas.

[0020] A further technical solution is that it further includes a recovery step: The gas drives the fine powder to enter the filter bag through the main pipe and the side pipes in sequence.

[0021] Compared with the prior art, the beneficial technical effects of the present invention are as follows: (1) First, the raw materials are ground by the middle grinding body, and the raw materials are divided into fine particles and coarse particles. The fine particles and coarse particles are screened. The fine particles directly enter the upper grinding body, and the fine particles formed after the coarse particles are ground by the lower grinding body will enter the upper grinding body, so as to ensure that the particles entering the upper grinding body are all fine particles. Then, the fine powder is formed by grinding with the upper grinding body, making the grinding of the raw materials delicate.

[0022] (2) The upper and lower ends of the inner surface of the first channel gradually extend upward from the edge to the middle to form an inclined surface. The inclination angle of the inclined surface is small, which avoids interfering with the flow of raw materials and gas. At the same time, the design of the inclined surface enables the raw materials and gas to always contact the middle grinding plate during the movement process, improving the grinding efficiency.

[0023] (3) If the raw materials are directly put into the first channel, the gas flowing in the first channel will form resistance, resulting in less contact between the raw materials and the middle grinding plate, reducing the grinding efficiency. The gas is sprayed by the injector to drive the raw materials into the first channel, making the raw materials have a certain impact force. The raw materials can impact on the middle grinding plate to form diffusion, enabling the raw materials to fully contact the middle grinding plate. The gas flowing in the first channel drives the raw materials to move for grinding, improving the grinding efficiency.

[0024] (4) The coarse particles enter between adjacent ring bodies through the space between adjacent conical rings. During the rotation of the conical part, the grinding blocks of adjacent ring bodies grind the coarse particles. After being ground into fine particles, they fall through the space between adjacent grinding blocks. If the coarse particles are not completely ground and fall to the lower grinding part, the acting part acts again, and the coarse particles fly back to the conical part again. Only after the coarse particles in the lower grinding body are ground into fine particles can they move up to the upper grinding body, reducing the grinding burden of the upper grinding body. The second driving device drives the lower grinding part to rotate, and the acting part rotates to generate gas to form an upward thrust on the fine particles. Driven by the gas, the fine particles enter the upper grinding body.

[0025] (5) The fine particles flow along the space between the ring blocks. When flowing to the position where the ring blocks on adjacent grinding rings are in contact with each other, due to the reverse rotation of the adjacent grinding rings, the end faces of the ring blocks grind the fine particles. After grinding, they continue to flow upward along the space between the ring blocks. The fine particles will be ground multiple times during the flowing process to form fine powder.

[0026] (6) The gas and fine powder enter the filter bag successively through the main pipe and the side pipe. The gas is discharged while the fine powder remains inside the filter bag. As more and more fine powder accumulates, the filter bag gradually sags to a preset state. The first solenoid valve closes the side pipe, and the second solenoid valve opens the recovery pipe. The filter bag is lifted, and the fine powder enters the recovery cylinder through the recovery pipe and is stored. At this time, the fine powder inside the filter bag is emptied. The second solenoid valve closes the recovery pipe, and the first solenoid valve opens the side pipe. The filter bag filters the fine powder again. After more fine powder accumulates inside the filter bag, the fine powder recovery can be quickly completed, resulting in a relatively high fine powder recovery efficiency. Description of the Drawings

[0027] Figure 1 Shows a schematic structural diagram of the raw material grinding device according to the first embodiment of the present invention.

[0028] Figure 2 Shows a schematic structural diagram of the grinding body in the first embodiment of the present invention.

[0029] Figure 3 Shows a schematic structural diagram of the upper grinding body in the first embodiment of the present invention.

[0030] Figure 4 Shows a schematic structural diagram of the lower grinding body in the first embodiment of the present invention.

[0031] Reference numerals in the drawings: 1, middle grinding body; 11, first channel; 12, grinding plate; 13, material cylinder; 14, injector; 15, middle inner body; 16, middle outer body; 17, inclined channel; 18, sandwich; 2, upper grinding body; 21, grinding ring; 22, first driving device; 221, motor; 222, first gear; 23, flow space; 24, ring block; 241, first tooth profile; 3, lower grinding body; 31, lower grinding part; 32, cone part; 321, ring body; 322, cone ring; 323, grinding block; 325, bracket; 326, third driving device; 327, second gear; 328, transmission gear; 33, acting part; 34, second driving device; 35, cone barrel; 4, recovery mechanism; 41, main pipe; 42, side pipe; 421, recovery pipe; 422, recovery cylinder; 423, first solenoid valve; 424, second solenoid valve; 43, filter bag; 5, second channel. Detailed Description of the Invention

[0032] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the device proposed by the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present invention will be clearer. It should be noted that the accompanying drawings are in a very simplified form and all use non-precise scales, and are only used to conveniently and clearly assist in explaining the objectives of the embodiments of the present invention. In order to make the objectives, features and advantages of the present invention more obvious and understandable, please refer to the accompanying drawings. It should be noted that the structures, scales, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they do not have technical substance significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present invention can produce and the objectives that can be achieved, should still fall within the scope covered by the technical content disclosed by the present invention.

[0033] Figure 1 The structural schematic diagram of the raw material grinding device according to the first embodiment of the present invention is shown. Figure 2 The structural schematic diagram of the grinding body in the first embodiment of the present invention is shown. Figure 3 The structural schematic diagram of the upper grinding body in the first embodiment of the present invention is shown. Figure 4 The structural schematic diagram of the lower grinding body in the first embodiment of the present invention is shown. In combination with Figures 1-4 As shown, the present invention discloses a raw material grinding device.

[0034] The raw material grinding device includes: a middle grinding body 1, an upper grinding body 2 connected to the upper end of the middle grinding body 1, a lower grinding body 3 connected to the lower end of the middle grinding body 1, and a recovery mechanism 4 provided at the outlet of the upper grinding body 2.

[0035] Among them, the upper grinding body 2, the middle grinding body 1 and the lower grinding body 3 are stacked and connected to each other from top to bottom. The upper end of the middle position of the middle grinding body 1 is connected to the lower end of the middle position of the upper grinding body 2, and the lower end of the middle position of the middle grinding body 1 is connected to the upper end of the middle position of the upper grinding body 2.

[0036] The middle grinding body 1 is connected to the raw material source and the gas source. An annular first channel 11 is formed in the middle grinding body 1, and the gas and the raw material are configured to flow along the first channel 11 for grinding. After the raw material is ground, fine particles and coarse particles are formed. Among them, the fine particles are small in size and light in weight, and the coarse particles are large in size and heavy in weight. The fine particles are driven by the gas into the upper grinding body 2, and the coarse particles enter the lower grinding body 3 due to their own weight.

[0037] A second channel 5 that diffuses from top to bottom is formed within the upper grinding body 2 and the lower grinding body 3, enabling the coarse particles to gradually disperse during the falling process and the fine particles to gradually accumulate during the rising process. Grinding is sequentially performed along the upper grinding body 2 or the lower grinding body 3. A lower grinding member 31 is provided at the middle position of the second channel 5 within the lower grinding body 3, and the raw material acts on the lower grinding member 31 when falling along the lower grinding body 3. The lower grinding member 31 rotates. When the coarse particles fall and disperse along the second channel 5 and come into contact with the lower grinding member 31, the coarse particles are broken or rebounded to the lower grinding body 3, and the lower grinding body 3 grinds the coarse particles until fine particles are formed. The fine particles rise and enter the second channel 5 of the upper grinding body 2, and the fine particles are ground under the action of the upper grinding body 2 until fine powder is formed. The fine powder is driven by the gas into the recovery mechanism 4 to complete the recovery.

[0038] In this application, the medium grinding body 1 first grinds the raw material, divides the raw material into fine particles and coarse particles, screens the fine particles and the coarse particles. The fine particles directly enter the upper grinding body 2, and the fine particles formed after the coarse particles are ground by the lower grinding body 3 will enter the upper grinding body 2, thereby ensuring that all the particles entering the upper grinding body 2 are fine particles. Then, fine powder is formed through the grinding of the upper grinding body 2, making the grinding of the raw material delicate.

[0039] The medium grinding body 1 includes: a medium inner body 15, a medium grinding plate 12 arranged around the first channel 11, a feed cylinder 13 inclinedly connected to the upper end of the first channel 11, and an injector 14 arranged on the feed cylinder 13. Among them, the raw material is placed at the feed port of the feed cylinder 13, and the injector 14 generates gas to drive the raw material into the first channel 11. The raw material and the gas gradually approach the center of the first channel 11 along the edge of the first channel 11, forming a spiral movement path. The raw material impacts the grinding plate 12 under the drive of the gas and acts on the grinding plate 12 for grinding.

[0040] The upper and lower ends of the inner surface of the first channel 11 gradually extend upward from the edge to the middle to form inclined surfaces. The inclination angle of the inclined surfaces is small to avoid interfering with the flow of the raw material and the gas. At the same time, the design of the inclined surfaces enables the raw material and the gas to always contact the medium grinding plate 12 during the movement process, improving the grinding efficiency.

[0041] The raw material is ground to form fine particles and coarse particles by hitting the grinding plate 12. The fine particles are lighter in weight and the coarse particles are heavier in weight. Under the drive of the gas, the fine particles and the coarse particles are gradually separated, so that the fine particles are located above the coarse particles, facilitating the fine particles to enter the upper grinding body 2, and the coarse particles fall into the lower grinding body 3.

[0042] An outer medium body 16 is arranged around the first channel 11 outside the medium inner body 15. A sandwich layer 18 communicating with the gas source is formed between the outer surface of the medium inner body 15 and the inner surface of the outer medium body 16. The sandwich layer 18 is a sealed space. An inclined channel 17 is formed around the first channel 11 in an inclined manner, and the inclined channel 17 communicates with the sandwich layer 18.

[0043] Gas enters the interlayer 18, and the gas enters the first channel 11 through the inclined channel 17 to form a spiral moving path, thereby driving the raw material to move for grinding.

[0044] If the raw material is directly put into the first channel 11, the gas flowing in the first channel 11 will form a resistance, resulting in less contact between the raw material and the middle grinding plate 12, reducing the grinding efficiency. The gas is sprayed by the injector 14 to drive the raw material into the first channel 11, so that the raw material has a certain impact force. The raw material can impact on the middle grinding plate 12 to form a diffusion, enabling the raw material to fully contact the middle grinding plate 12. The gas flowing in the first channel 11 drives the raw material to move for grinding, improving the grinding efficiency.

[0045] The lower grinding body 3 includes: a second driving device 34, a cone barrel 35, a cone member 32 rotatably arranged on the cone barrel 35, and acting members 33 arranged side by side around the lower grinding member 31. Among them, the acting member 33 bends and extends towards the cone barrel 35. Exemplarily, the second driving device 34 is a motor. The second driving device 34 drives the lower grinding member 31 to rotate, and the acting member 33 acts on the raw material towards the cone member 32. The coarse particles fall and contact the acting member 33. The acting member 33 crushes a part of the coarse particles, and the other part of the coarse particles fly towards the cone member 32 under the acting force of the acting member 33.

[0046] The cone member 32 includes an annular body 321 and a cone ring 322 arranged at the lower end of the annular body 321. Grinding blocks 323 are arranged side by side at intervals on the side of the annular body 321. The width of the cone ring 322 gradually narrows from top to bottom, enabling the coarse particles to smoothly enter between adjacent cone rings 322. The coarse particles enter between adjacent annular bodies 321 through between adjacent cone rings 322. During the rotation of the cone member 32, the grinding blocks 323 of adjacent annular bodies 321 grind the coarse particles. After being ground into fine particles, they fall through between adjacent grinding blocks 323. If the coarse particles are not completely ground and fall to the lower grinding member 31, the acting member 33 acts again, and the coarse particles fly towards the cone member 32 again. Only after the coarse particles in the lower grinding body 3 are ground into fine particles can they move up to the upper grinding body 2, reducing the grinding burden of the upper grinding body 2.

[0047] A second tooth shape is arranged around the upper end of the annular body 321. The lower grinding body 3 further includes a bracket 325, a third driving device 326, and a second gear 327 arranged side by side at the driving end of the third driving device 326. The second gear 327 meshes with the second tooth shape. The third driving device 326 drives the second gear 327 to rotate, driving the annular body 321 to rotate. When the second gear 327 cannot mesh with the second tooth shape, a transmission gear 328 is rotatably arranged on the bracket 325. The transmission gear 328 meshes with the second gear 327 and the second tooth shape respectively. The third driving device 326 drives the second gear 327 to rotate. The second gear 327 drives the transmission gear 328 to rotate, and the transmission gear 328 drives the annular body 321 to rotate.

[0048] The second driving device 34 drives the lower grinding member 31 to rotate, and the acting member 33 rotates to generate a gas that forms an upward thrust on the fine particles. Driven by the gas, the fine particles enter the upper grinding body 2.

[0049] The upper grinding body 2 includes: a first driving device 22 and grinding rings 21 stacked along the raw material moving direction. Among them, a flow space 23 is formed inside the grinding ring 21. Along the raw material moving direction, the diameter of the flow space 23 gradually decreases, and the inner diameter size of the grinding ring 21 gradually decreases. The gas drives the fine particles to flow upward along the flow space 23 and contacts different grinding rings 21. The first driving device 22 drives adjacent grinding rings 21 to rotate in opposite directions, thereby completing the grinding of the fine particles.

[0050] Ring blocks 24 are arranged side by side around the grinding ring 21, and the ring blocks 24 on adjacent grinding rings 21 contact and grind the raw material with each other. The fine particles flow between the ring blocks 24. When flowing to the position where the ring blocks 24 on adjacent grinding rings 21 contact each other, due to the opposite rotation of the adjacent grinding rings 21, the end faces of the ring blocks 24 grind the fine particles. After grinding is completed, the fine particles continue to flow upward between the ring blocks 24. Exemplarily, there are multiple groups of grinding rings 21. The fine particles will be ground multiple times during the flowing process to form fine powder.

[0051] The first driving device 22 includes a motor 221 and a first gear 222 arranged side by side at the driving end of the motor 221. Exemplarily, there are two groups of the first driving device 22. The two groups of the first driving device 22 drive the grinding rings 21 to rotate to complete the opposite rotation of the adjacent grinding rings 21. A first tooth shape 241 is arranged around the ring block 24, and the first gear 222 meshes with the first tooth shape 241. The motor 221 drives the first gear 222 to rotate, thereby driving the ring block 24 to rotate.

[0052] The recovery mechanism 4 includes: a main pipe 41 communicating with the upper grinding body 2, side pipes 42 arranged side by side and communicating with the main pipe 41, and filter bags 43 communicating with the outlets of the side pipes 42. Among them, the side pipes 42 are horizontally arranged. The main pipe 41 communicates with the upper end of the upper grinding body 2 and forms a bend to the side and communicates with the side pipes 42. And because the side pipes 42 are horizontally arranged, the fine powder will not flow back. After gas is blown into the filter bag 43, the filter bag 43 expands to a horizontal state. When the fine powder in the filter bag 43 increases and the weight is heavier, the filter bag 43 will gradually sag.

[0053] A recovery pipe 421 is inclined and communicated with the side pipe 42, and the recovery pipe 421 communicates with a recovery cylinder 422. The inlet of the recovery pipe 421 is close to the filter bag 43. A first solenoid valve 423 is arranged on the side pipe 42, and a second solenoid valve 424 is arranged on the recovery pipe 421.

[0054] The gas and fine powder pass through the main pipe 41 and the side pipe 42 in sequence and then enter the filter bag 43. The gas is discharged while the fine powder remains inside the filter bag 43. As more fine powder accumulates, the filter bag 43 gradually sags to a preset state. The first solenoid valve 423 closes the side pipe 42, and the second solenoid valve 424 opens the recovery pipe 421. The filter bag 43 is lifted and the fine powder enters the recovery cylinder 422 through the recovery pipe 421 and is stored. At this time, the fine powder inside the filter bag 43 is emptied. The second solenoid valve 424 closes the recovery pipe 421, and the first solenoid valve 423 opens the side pipe 42. The filter bag 43 resumes filtering the fine powder. After more fine powder accumulates inside the filter bag 43, the fine powder recovery can be quickly completed, resulting in a relatively high fine powder recovery efficiency.

[0055] Second Embodiment:

[0056] The difference between the second embodiment and the first embodiment is:

[0057] The grinding method of the raw material grinding device includes the following steps:

[0058] In the grinding and separation step, raw materials and gas are introduced into the middle grinding body 1. The gas and raw materials flow along the first channel 11, and the grinding plate 12 grinds the raw materials to form fine particles and coarse particles. Gas is introduced into the sandwich layer 18, and the gas enters the first channel 11 through the inclined channel 17. The gas moves spirally from the edge to the center of the first channel 11. The injector 14 injects gas to drive the raw materials into the first channel 11. The raw materials impact on the middle grinding plate 12 and, driven by the gas, move spirally. During the movement, the raw materials collide with the middle grinding plate 12 and break into fine particles and coarse particles.

[0059] Due to the weight difference between the fine particles and the coarse particles, the fine particles and the coarse particles are separated during the flow process, causing the fine particles to be driven by the gas into the upper grinding body 2, and the coarse particles to fall into the lower grinding body 3 due to their own weight.

[0060] The flow rate of the gas introduced into the sandwich layer 18 is determined according to the raw material specifications. The speed of the gas injected by the injector 14 is determined according to the flow rate of the gas introduced into the sandwich layer 18. The amount of gas injected by the injector 14 is determined according to the amount of raw materials.

[0061] The rougher the raw material specifications, the heavier the raw material particles. A higher flow rate of the gas introduced into the sandwich layer 18 is set, and the raw materials move at a high speed and act on the middle grinding plate 12 to complete efficient grinding.

[0062] The finer the raw material specifications, the lighter the raw material particles. If the flow rate of the gas introduced into the sandwich layer 18 is high, the raw material particles will fly. Therefore, a lower flow rate of the gas introduced into the sandwich layer 18 is set to make the raw materials move at a low speed, causing the raw materials to sink and act on the middle grinding plate 12 to complete grinding.

[0063] The higher the flow rate of the gas introduced into the interlayer 18, the greater the resistance formed, and the greater the speed of the gas ejected by the ejector 14 is required to overcome the resistance so that the raw material can contact the middle grinding plate 12.

[0064] The lower the flow rate of the gas introduced into the interlayer 18, the smaller the resistance formed. If the speed of the gas ejected by the water ejector 14 is too high, splashing will occur when the raw material contacts the middle grinding plate 12, causing the raw material to fly. Therefore, the speed of the gas ejected by the ejector 14 needs to be lower.

[0065] The larger the amount of raw material, the greater the thrust required to push the raw material into the first channel 11. Therefore, the larger the amount of gas ejected by the ejector 14.

[0066] The smaller the amount of raw material, if the amount of gas ejected by the ejector 14 is too large, it will cause the raw material to fly. Therefore, the smaller the amount of gas ejected by the ejector 14.

[0067] In the cyclic grinding step, during the fall of the coarse particles in the second channel 5 of the lower grinding body 3, the second driving device 34 drives the lower grinding member 31 to rotate, and the coarse particles break or act on the conical member 32 after contacting the acting member 33.

[0068] The conical member 32 grinds the coarse particles to form fine particles. The coarse particles enter between the adjacent ring bodies 321 through between the adjacent conical rings 322. The first driving device 22 drives the ring body 321. The ring body 321 rotates and grinds the coarse particles through the grinding blocks 323. After being ground into fine particles, they fall through between the adjacent grinding blocks 323.

[0069] The second driving device 34 drives the conical member 32 to rotate, and the acting member 33 rotates to generate upward gas. Under the action of the gas, the fine particles enter the upper grinding body 2.

[0070] The rotation speed of the conical member 32 is maintained in a relatively fast range to ensure sufficient thrust on the coarse particles so that the coarse particles can move towards the ring body 321.

[0071] If the rotation speed of the ring body 321 is relatively fast, a rebound will occur when the coarse particles contact the ring body 321. The rotation speed of the ring body 321 is maintained in a low speed range so that the coarse particles can smoothly enter between the ring bodies 321.

[0072] In the re-grinding step, the fine particles gradually accumulate in the second channel 5, and the fine particles act on the grinding rings 21. Two sets of first driving devices 22 pass through, and the motor 221 drives the first gear 222 to rotate, driving the adjacent grinding rings 21 to rotate in opposite directions.

[0073] The adjacent grinding rings 21 grind the fine particles to form fine powder, and the fine powder is discharged under the drive of the gas. The end face of the ring block 24 grinds the fine particles to form fine powder, and the fine powder continues to flow upward along between the ring blocks 24 under the action of the gas after the grinding is completed.

[0074] Recovery step: The gas drives the fine powder to enter the filter bag 43 through the main pipe 41 and the side pipe 42 in sequence. After the gas passes through the filter bag 43, it is discharged, and the fine powder accumulates in the filter bag 43.

[0075] Sensors are respectively arranged in the preset inflated state and the sagging state of the filter bag 43, and the sensors sense the filter bag 43. When the fine powder accumulates to a large amount and sags to the preset state and is detected by the sensor, the sensor emits a signal to the first solenoid valve 423 and the second solenoid valve 424 and notifies the operator. The first solenoid valve 423 closes the side pipe 42, and the second solenoid valve 424 opens the recovery pipe 421. The operator lifts the filter bag 43, and the fine powder enters the recovery cylinder 422 through the recovery pipe 421 and is stored. After the fine powder in the filter bag 43 is emptied, the operator operates to make the second solenoid valve 424 close the recovery pipe 421, and the first solenoid valve 423 opens the side pipe 42, and the filter bag 43 filters the fine powder again.

[0076] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0077] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A raw material grinding device, characterized in that, Comprising: A middle grinding body (1), connecting a raw material source and a gas source; An upper grinding body (2), connected to the upper end of the middle grinding body (1); A lower grinding body (3), connected to the lower end of the middle grinding body (1); A recovery mechanism (4), arranged at the outlet of the upper grinding body (2); Wherein, an annular first channel (11) is formed in the middle grinding body (1), and gas and raw materials are configured to flow and grind along the first channel (11); a second channel (5) that diffuses from top to bottom is formed in the upper grinding body (2) and the lower grinding body (3); a lower grinding member (31) is arranged at the middle position of the second channel (5) in the lower grinding body (3), and the raw materials act on the lower grinding member (31) when falling along the lower grinding body (3).

2. The raw material grinding device according to claim 1, characterized in that, The middle grinding body (1) includes: a middle inner body (15), a middle grinding plate (12) arranged around the first channel (11), a feed cylinder (13) inclinedly connected to the upper end of the first channel (11), and an injector (14) arranged on the feed cylinder (13); wherein, the injector (14) generates gas to drive the raw materials into the first channel (11), and the raw materials act on the grinding plate (12) for grinding.

3. The raw material grinding device according to claim 2, characterized in that, An outer middle body (16) is arranged around the middle inner body (15) outside the first channel (11); an inclined channel (17) is formed obliquely around the first channel (11); a sandwich layer (18) connecting the gas source is formed between the middle inner body (15) and the outer middle body (16), and the inclined channel (17) communicates with the sandwich layer (18).

4. The raw material grinding device according to claim 3, characterized in that, The upper grinding body (2) includes: a first driving device (22) and grinding rings (21) stacked along the moving direction of the raw materials; wherein, a flow space (23) is formed in the grinding rings (21), and the diameter of the flow space (23) gradually decreases along the moving direction of the raw materials; the first driving device (22) drives adjacent grinding rings (21) to rotate in opposite directions; ring blocks (24) are arranged side by side around the grinding rings (21), and the ring blocks (24) on adjacent grinding rings (21) contact and grind the raw materials with each other.

5. The raw material grinding device according to claim 3, characterized in that The lower grinding body (3) includes: a second driving device (34), a conical cylinder (35), a conical member (32) rotatably arranged on the conical cylinder (35), and acting members (33) arranged side by side around the lower grinding member (31); wherein, the acting members (33) bend and extend towards the conical cylinder (35); the second driving device (34) drives the lower grinding member (31) to rotate, and the acting members (33) act on the raw materials towards the conical member (32).

6. The raw material grinding device according to claim 3, wherein The recovery mechanism (4) includes: a main pipe (41) communicating with the upper grinding body (2), side pipes (42) connected in parallel to the main pipe (41), and filter bags (43) communicating with the outlets of the side pipes (42); wherein, the side pipes (42) are horizontally arranged.

7. A grinding method for a raw material grinding device, characterized in that, Including the following steps: Grinding and separating step: Raw materials and gas are introduced into the medium grinding body (1); the gas and raw materials flow along the first channel (11), and the grinding plate (12) grinds the raw materials to form fine particles and coarse particles; the fine particles are carried by the gas into the upper grinding body (2), and the coarse particles fall into the lower grinding body (3) due to their own weight; Circular grinding step: The second driving device (34) drives the lower grinding member (31) to rotate. After the coarse particles contact the acting member (33), they are broken or act on the conical member (32); the conical member (32) grinds the coarse particles to form fine particles, and under the action of the gas, the fine particles enter the upper grinding body (2); Re-grinding step: The first driving device (22) drives the adjacent grinding rings (21) to rotate in opposite directions. The adjacent grinding rings (21) grind the fine particles to form fine powder, and the fine powder is discharged under the drive of the gas.

8. The grinding method of the raw material grinding device according to claim 7, characterized in that, It further includes a recovery step: The gas drives the fine powder to enter the filter bag (43) through the main pipe (41) and the side pipe (42) in sequence.

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