A fine grinding device
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGSHA SHENXIANG UNIVERSAL MACHINE
- Filing Date
- 2025-07-09
- Publication Date
- 2026-07-21
Smart Images
Figure CN224524838U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of grinding technology, and in particular to a fine grinding device. Background Technology
[0002] In related technologies, the inner surface of the liner of the ring roller mill is made of multiple arc grooves or a flat surface, while the grinding roller corresponding to the liner is made of an arc-shaped ring or a cylindrical ring.
[0003] However, during the process of the material to be ground passing between the liner and the grinding roller, the falling speed is too fast and it passes directly between the liner and the grinding roller, reducing the chance of it being ground. This results in poor grinding effect of the ring roller mill, leading to problems such as low output, high power consumption and coarse product particle size. Utility Model Content
[0004] In view of this, the main objective of the embodiments of this application is to provide a fine grinding device with good grinding effect.
[0005] To achieve the above objectives, the technical solution of this application embodiment is implemented as follows:
[0006] This application provides a fine grinding device, including:
[0007] A housing having a feed inlet;
[0008] A grinding roller assembly is disposed within the housing. The grinding roller assembly includes a plurality of grinding rollers spaced apart in a vertical direction. Each grinding roller forms a crushing zone with the inner sidewall of the housing. The bottom end of the crushing zone has a material inlet, and the material inlet is located on the top side of the grinding roller assembly.
[0009] A first drive assembly is drivenly connected to the grinding roller assembly to cause the grinding roller to rotate about the inner circumference of the housing;
[0010] The housing has multiple material stopping parts, each of which is spaced apart in the vertical direction and corresponds to one of the rolling zones. At least a portion of each material stopping part extends to the bottom side of the corresponding material outlet.
[0011] In one embodiment, at least a portion of the stop portion extends to the bottom side of the corresponding grinding roller and forms a material accumulation cavity between it and the bottom surface of the grinding roller. One end of the material accumulation cavity is connected to the rolling zone, and the other end of the material accumulation cavity is open.
[0012] In one embodiment, the compaction zone is recessed towards the inner wall of the housing, so that the vertical cross-section of the compaction zone is an arc-shaped cross-section bending towards the inner wall of the housing; or,
[0013] The compaction zone is recessed towards the inner wall of the shell, so that the vertical cross-section of the compaction zone is a straight cross-section recessed towards the inner wall of the shell, and the straight cross-section extends along the vertical direction.
[0014] In one embodiment, the housing includes a liner with a crushing space. The liner includes a plurality of plate portions and a plurality of stop portions. The stop portions are disposed one-to-one at the bottom end of the plate portions. Each plate portion and the stop portion together form the crushing space. The stop portion protrudes relative to the plate portion toward the crushing space. The grinding roller is located in the crushing space and forms the crushing zone one-to-one with the plate portions.
[0015] In one embodiment, in adjacent material stop portions and adjacent plate portions, the inner diameter of the top material stop portion is larger than the inner diameter of the bottom material stop portion, and the inner diameter of the top plate portion is larger than the inner diameter of the bottom plate portion, so that the vertical cross-section of the compaction space is a stepped cross-section.
[0016] In one embodiment, within the compaction space, the vertical section of the compaction zone extends along the vertical direction; or,
[0017] Within the compaction space, the extension direction of the vertical section of the compaction zone is inclined relative to the vertical direction.
[0018] In one embodiment, the stop portion extends circumferentially along the bottom edge of the corresponding plate portion to form an annular stepped surface together with the corresponding plate portion.
[0019] In one embodiment, the housing includes a housing body and a liner disposed within the housing body. The liner has a compaction space and a stop portion. The grinding roller is located in the compaction space, and the compaction zone is formed between the grinding roller and the inner wall of the liner.
[0020] The shell body protrudes in a portion of the bottom end of the liner to form a positioning step, and the liner abuts against the positioning step.
[0021] In one embodiment, the outer wall surface of the liner and the side wall surface of the shell body extend along the vertical direction; or,
[0022] The side wall of the shell body gradually slopes towards the liner from top to bottom, and the outer wall of the liner gradually slopes towards the crushing space from top to bottom.
[0023] In one embodiment, the grinding roller has an inverted truncated cone surface or a forward truncated cone surface, and the corresponding plate body has a corresponding oblique cone surface.
[0024] In one embodiment, the grinding roller assembly further includes a rotating body and one or more rotating shafts passing through the rotating body, the rotating shafts extending along the vertical direction, and a plurality of grinding rollers rotatably mounted on the rotating shafts. The first drive assembly is drivenly connected to the rotating body to cause the rotating body to rotate.
[0025] In one embodiment, the rotating body includes a spacer platform and a main shaft extending in a vertical direction. The spacer platforms are spaced and fitted onto the main shaft. The rotating shaft passes through each of the spacer platforms. The grinding rollers are respectively arranged at the intervals between two adjacent spacer platforms. The first driving component is drivenly connected to the main shaft.
[0026] In one embodiment, the housing has a suction port and an airflow inlet communicating with the outside. The suction port is located on the top side of the feed port, and the airflow inlet is located on the bottom side of the grinding roller assembly. The fine grinding equipment also includes a powder classifier disposed at the suction port. An airflow path is formed between the airflow inlet and the suction port, passing through the grinding roller assembly and the powder classifier.
[0027] In one embodiment, the housing includes a housing body and a liner disposed within the housing body. The liner has a crushing space and a material stop portion. The grinding roller is located in the crushing space, and the crushing zone is formed between the grinding roller and the inner sidewall of the liner. A portion of the housing body near the liner extends through to form an annular flow channel around the circumference of the grinding roller assembly. The two opposite ends of the annular flow channel along the top-bottom direction are respectively connected to the airflow inlet and the suction port.
[0028] In one embodiment, the fine grinding equipment further includes a scraper block disposed at the bottom of the grinding roller assembly, and the housing also has a discharge port located on the bottom side of the grinding roller assembly. The scraper block can rotate with the grinding roller assembly to discharge the ground material through the discharge port into the housing; or,
[0029] The first drive assembly is disposed on the upper part of the liner of the housing and the grinding roller assembly, and at least a portion of the housing located on the bottom side of the grinding roller assembly is open to allow the ground material to be discharged.
[0030] This application provides a fine grinding device, which includes a housing, a grinding roller assembly, and a first drive assembly. The grinding roller assembly includes multiple grinding rollers spaced apart in a vertical direction, each forming a crushing zone between itself and the inner wall of the housing. The bottom end of the crushing zone has a material passage. The housing has multiple stopping parts, each spaced apart in a vertical direction and corresponding to a crushing zone. At least a portion of each stopping part extends to the bottom side of the corresponding material passage. Thus, the stopping parts obstruct the material falling from the material passage, causing the material passing through the crushing zone to accumulate on the stopping parts. This slows down the material's descent speed within the crushing zone, resulting in a thicker material layer crushed by the grinding rollers. This allows for more material to be crushed each time, increasing the number of times any single piece of material is crushed. Due to the high grinding efficiency, more qualified fine powder is produced in the material, leading to more qualified fine powder being separated and less coarse material returning to the grinding rollers. This significantly increases the amount of material fed into the device. Therefore, the main objective of significantly increasing or even doubling production capacity can be achieved, while increased production capacity leads to a substantial reduction in power consumption and wear parts wear. Simultaneously, materials can be ground finer, and the thicker material layer results in better particle shape. In other words, the fine grinding equipment of this application allows materials to undergo more grinding cycles, resulting in a better grinding effect, thereby increasing product output, reducing energy consumption, and achieving a finer particle size. Furthermore, the reduced falling speed of the material as it passes through the grinding zone and the accumulation at the stop section result in a thicker material layer in the grinding zone. This reduces direct collision between the grinding rollers and the housing, thereby reducing equipment wear and damage, and decreasing operating noise. In addition, by arranging multiple grinding rollers at vertical intervals and correspondingly providing stop sections on the bottom side of the material inlet in each grinding zone, the falling speed of the material in each grinding zone can be significantly reduced, and the thickness of the material layer can be increased to further improve the grinding effect. Attached Figure Description
[0031] Figure 1 This is a structural schematic diagram of the fine grinding equipment in the relevant technology;
[0032] Figure 2 This is a schematic diagram of the structure of a grinding roller assembly and a liner according to an embodiment of this application. Only a portion of the structure is shown in the figure.
[0033] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;
[0034] Figure 4 This is a schematic diagram of another form of the liner and grinding roller;
[0035] Figure 5 This is a schematic diagram of the structure of the grinding roller assembly and liner according to another embodiment of this application. Only a portion of the structure is shown in the figure.
[0036] Figure 6 for Figure 5 A magnified view of a section at point B in the middle;
[0037] Figure 7 This is a schematic diagram of another form of the liner and grinding roller;
[0038] Figure 8 This is a schematic diagram of another form of the liner and grinding roller.
[0039] Explanation of reference numerals in the attached figures
[0040] 10. Shell; 10a. Feed inlet; 10b. Suction port; 10c. Airflow inlet; 10d. Annular flow channel; 11. Liner; 11a. Compacting space; 111. Material stop; 111a. Material storage chamber; 112. Plate body; 12. Shell body; 121. Positioning step; 20. Grinding roller assembly; 21. Grinding roller; 21a. Compacting zone; 21b. Feed outlet; 22. Rotating body; 221. Spacer platform; 222. Main shaft; 23. Rotating shaft; 30. First drive assembly; 40. Powder classifier; 41. Second drive assembly; 42. Impeller assembly; 421. Impeller shaft; 422. Impeller; 50. Discharge port; 60. Scraper. Detailed Implementation
[0041] In this application, the orientation or positional relationship of "top", "bottom", and "vertical direction" is based on the appendix. Figure 1 The orientation or positional relationship shown is for illustrative purposes only and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.
[0042] Fine grinding equipment can be any type of fine grinding mill or other rolling equipment, such as ring roller mill, Raymond mill, Raymond mill or other centrifugal mill, etc.
[0043] For example, Figure 1 The fine grinding equipment in this article is a ring roller mill, which is a widely used fine grinding equipment. It integrates fine grinding, powder selection, and conveying, and can be applied to fine and ultrafine grinding in mining, chemical industry, and various new materials.
[0044] Except for the technical solution and improvements, the operation of this application is similar to related technologies. For the overall working process of this application, please refer to related technologies. Figure 1The housing 10 has a suction port 10b and an airflow inlet 10c that communicates with the outside. The suction port 10b is located on the top side of the feed port 10a, and the airflow inlet 10c is located on the bottom side of the grinding roller assembly 20. The fine grinding equipment also includes a powder classifier 40 disposed at the suction port 10b. An airflow path is formed between the airflow inlet 10c and the suction port 10b, which flows through the grinding roller assembly 20 and the powder classifier 40.
[0045] Specifically, the airflow path is the path through which airflow enters from the airflow inlet 10c and exits from the suction port 10b. In practice, the airflow inlet 10c can be used to allow high-speed external airflow to flow into and through the annular flow channel 10d of the housing 10, carrying the powder crushed by the grinding roller 21 towards the top region within the housing 10, and then exiting from the suction port 10b after passing through the powder classifier 40. The powder classifier 40 controls the fineness of the discharged fine powder; coarse powder is separated and falls into the grinding roller assembly 20 for further rolling. Qualified fine powder passing through the powder classifier 40 is carried out of the mill by the airflow outlet and can be collected by the dust collection device in the process.
[0046] The specific structure of the powder classifier 40 can be set according to the actual situation.
[0047] For example, the powder classifier 40 includes a second drive assembly 41 and an impeller assembly 42. The impeller assembly 42 is located at the suction port 10b and includes an impeller shaft 421 and an impeller 422 mounted on the impeller shaft 421. The second drive assembly 41 drives the impeller 422 to rotate. When the airflow carries powder upwards to the impeller assembly 42, the coarser powder will fall downwards to the grinding roller assembly 20 under the action of the high-speed rotating impeller 422 and be crushed again. According to the settings, the finer powder will enter the impeller 422 and rise to be discharged from the suction port 10b. The fine powder will be collected by a dust collection device or the like to become the product, or it can be further classified and collected to become the product.
[0048] exist Figures 2 to 8The technical solution of this application slows down the falling speed of the material, thickens the material layer, and allows more material to be crushed each time. This also allows more material to be crushed by the grinding roller 21 more times, resulting in finer grinding and finer particle size. More material is selected by the powder separator 40 within the fine grinding equipment, reducing the amount of material circulating within the equipment. This allows for a significant increase in the amount of new material fed in, and consequently, a higher output. Therefore, the output of equipment of the same specifications can be significantly increased, while energy consumption and the wear and tear on vulnerable parts are significantly reduced. The significantly thickened material layer prevents direct contact between the grinding roller 21 and the housing 10, avoiding violent collisions and dry friction, further reducing the wear and tear on vulnerable parts. Furthermore, the absence of direct collisions and dry friction between the grinding roller 21 and the housing 10 eliminates sharp noise, significantly reducing operating noise and resulting in a better environmental effect.
[0049] In one embodiment, the housing 10 includes a housing body 12 and a liner 11 disposed on the housing body 12. The liner 11 has a crushing space 11a and a stopping portion 111. The grinding roller 21 is located in the crushing space 11a, and a crushing zone 21a is formed between the grinding roller 21 and the inner sidewall of the liner 11. A portion of the housing body 12 near the liner 11 extends through to form an annular flow channel 10d circumferentially around the grinding roller assembly 20. The two opposite ends of the annular flow channel 10d along the top-bottom direction are respectively connected to an airflow inlet 10c and a suction port 10b.
[0050] Specifically, after being crushed by the grinding roller assembly 20, the material mixes with air from the airflow inlet 10c and rises through the annular flow channel 10d to the powder classifier 40. Coarse powder in the material enters the grinding roller assembly 20 for further grinding via free fall, while qualified fine powder rises and exits the fine grinding equipment through the suction port 10b. It can then be further separated into even finer ultrafine powder, or collected by a dust collection device to become the final product. This simplifies the structure of the fine grinding equipment.
[0051] It should be noted that, in some embodiments, the fine grinding equipment also includes a scraper 60 disposed at the bottom of the grinding roller assembly 20, which can rotate with the grinding roller assembly 20. The scraper 60 can rotate to scrape the material falling to the bottom side of the grinding roller assembly 20 to the bottom end of the annular flow channel 10d, so that the material can move along the annular flow channel 10d towards the powder classifier 40 with the airflow.
[0052] In some embodiments, the housing 10 also has a discharge port 50 located at the bottom side of the grinding roller assembly. When the material enters the housing 10 from the upper inlet 10a, it falls under the influence of gravity and is then crushed by the grinding rollers 21. The crushed material is discharged from the discharge port 50 at the bottom side as a coarser powder. Thus, the fine grinding equipment in this embodiment does not require a powder classifier 40 or the introduction of rising air, which simplifies the structure inside the housing 10 of the fine grinding equipment. At the same time, a coarse and fine particle classification device can be provided outside the housing 10 to classify the material discharged from the discharge port 50.
[0053] One embodiment of this application provides a fine grinding device; please refer to [link / reference]. Figures 1 to 5 The fine grinding equipment includes a housing 10, a grinding roller assembly 20, and a first drive assembly 30.
[0054] The housing 10 has an inlet 10a for allowing material to enter the housing 10.
[0055] The grinding roller assembly 20 is disposed inside the housing 10. The grinding roller assembly 20 includes a plurality of grinding rollers 21 spaced apart in the vertical direction. Each grinding roller 21 forms a crushing zone 21a between itself and the inner sidewall of the housing 10. The bottom end of the crushing zone 21a has a material outlet 21b, and the inlet 10a is located on the top side of the grinding roller assembly 20.
[0056] Specifically, the grinding roller assembly 20 is located on the bottom side of the feed inlet 10a, so that the material entering the housing 10 through the feed inlet 10a can pass through the crushing zone 21a under the action of gravity and be crushed by the grinding roller assembly 20.
[0057] By setting multiple grinding rollers 21, multiple grinding zones 21a can be formed between each grinding roller 21 and the inner sidewall of the housing 10, which are spaced apart in the vertical direction, so that the material can be ground multiple times, thereby improving the grinding effect.
[0058] It should be noted that the grinding roller 21 is separable from the inner wall of the housing 10, and the crushing zone 21a is the area between the grinding roller 21 and the inner wall of the housing 10. During the operation of the fine grinding equipment, when material passes through the crushing zone 21a, the grinding roller 21 and the inner wall of the housing 10 are separated. However, during the operation of the fine grinding equipment, if no material passes through the crushing zone 21a, the grinding roller 21 will be pressed tightly against the inner wall of the housing 10 without gaps due to centrifugal force during rotation. That is to say, during the material crushing process, the gap between the two will be dynamically adjusted according to the thickness of the material layer between them. When the material layer in the crushing zone 21a is thicker, the gap between the two will also widen, and when the material feeding stops, the grinding roller 21 will be pressed tightly against the inner wall of the housing 10 under the centrifugal force during rotation. The formation of a crushing zone 21a between the grinding roller 21 and the inner wall of the housing 10 does not mean that the two do not contact each other under any circumstances, but rather that there is a crushing zone 21a between the grinding roller 21 and the inner wall of the housing 10 for crushing materials.
[0059] Furthermore, the compaction zone 21a can extend in a vertical direction, that is, the extension direction of the compaction zone 21a is parallel to the vertical direction.
[0060] Depending on the actual situation, the extension direction of the compaction zone 21a can also be inclined at a certain angle relative to the vertical direction. This reduces the speed at which the material passes through the top side of the compaction zone 21a and falls to the bottom side. By reducing the falling speed of the material, the thickness of the material layer in the compaction zone 21a can be increased, thereby improving the crushing efficiency.
[0061] The bottom end of the compaction zone 21a has a material inlet 21b, through which material can enter from the top of the compaction zone 21a and exit from the bottom end through the material inlet 21b. In fact, multiple compaction zones 21a are arranged at intervals along the vertical direction. After the material exits from the material inlet 21b of the compaction zone 21a located on the top side, it will enter the compaction zone 21a located on the bottom side to continue compaction.
[0062] The first drive assembly 30 is driven to connect with the grinding roller assembly 20 so that the grinding roller 21 rotates around the inner circumference of the housing 10.
[0063] Specifically, the first drive component 30 is a device capable of driving the grinding roller assembly 20 to rotate around the inner circumference of the housing 10, such as a drive motor or other drive structure capable of providing a driving effect. The first drive component 30 can directly drive the grinding roller assembly 20 to rotate or indirectly drive the grinding roller assembly 20 to rotate.
[0064] For example, the first drive assembly 30 and the grinding roller assembly 20 are driven by a transmission mechanism (such as a drive shaft, pulley, reducer, etc.) to drive the grinding roller assembly 20 to rotate.
[0065] The grinding roller 21 rotates around the inner circumference of the housing 10. In fact, the housing 10 has a receiving cavity, the grinding roller assembly 20 is located in the receiving cavity, and the grinding roller 21 rotates circumferentially along the inner sidewall of the housing 10 located in the receiving cavity.
[0066] See Figures 2 to 7 The housing 10 has a plurality of material stopping parts 111, each of which is arranged at intervals in the vertical direction and corresponds to the rolling zone 21a. At least a portion of the material stopping part 111 extends to the bottom side of the corresponding material outlet 21b.
[0067] The material stop 111 of the housing 10 can effectively block material falling from the feed inlet 10a and passing through the crushing zone 21a. Specifically, on the one hand, the material stop 111 extends to the bottom side of the feed inlet 21b, thereby blocking the material falling into the crushing zone 21a and limiting its direct and rapid passage. The material impacting the material stop 111 is slowed down due to reduced speed, forming a temporary accumulation on the top side of the material stop 111, which makes the material layer in the crushing zone 21a thicker and improves the grinding effect of the grinding roller 21. This solves the problem of insufficient grinding cycles and inadequate actual grinding. On the other hand, the material stop 111 does not completely seal the feed inlet 21b, so after being slowed down by the material stop 111, the material can continue to fall laterally towards the bottom of the housing 10. The material stop 111 does not completely block the bottom of the crushing zone 21a to completely prevent the passage of material. Therefore, by setting the stop part 111, on the one hand, the thickness of the material layer can be increased and the falling speed of the material can be reduced, increasing the number of times the material is crushed, thereby significantly improving production capacity and efficiency. On the other hand, the increased thickness of the crushed material reduces the chance and intensity of direct collision between the grinding roller 21 and the housing 10, thereby reducing wear, breakage, and operating noise.
[0068] The housing 10 has multiple material stop portions 111, each corresponding to a grinding zone 21a and a grinding roller 21. In other words, each grinding zone 21a has a corresponding material stop portion 111 extending to its bottom side at its feed inlet 21b. This reduces the falling speed of material within each grinding zone 21a, increasing the thickness of the material layer and further improving the grinding effect.
[0069] It's important to note that increasing the thickness of the material layer allows for thicker layer compaction rather than single-particle pulverization or thin-layer pulverization. Thicker layer compaction results in a higher proportion of cubic or spherical particles, as thin layers tend to produce needle-like or flaky particles. This particle shape alters many product properties, such as increasing layer density, facilitating better chemical reactions and mixing with other materials, and improving overall material composition. Furthermore, a thicker layer can further reduce wear and noise.
[0070] The material stop 111 can extend horizontally, such as by extending horizontally. This allows the material stop 111 to better buffer the falling speed of the material.
[0071] Depending on the actual situation, the extension direction of the stop part 111 can be at a certain angle to the horizontal direction, but the angle is less than 90°. For example, the extension direction of the stop part 111 may be inclined relative to the horizontal direction.
[0072] Furthermore, the extension length of the stop part 111 can be determined according to the actual situation.
[0073] For example, please see Figures 2 to 4 At least a portion of the material stop portion 111 extends to the bottom side of the corresponding grinding roller 21 and forms a material stacking cavity 111a between it and the bottom surface of the grinding roller 21. One end of the material stacking cavity 111a is connected to the rolling zone 21a, and the other end of the material stacking cavity 111a is open.
[0074] Specifically, the material stop 111 extends to the bottom side of the grinding roller 21 and forms a material accumulation cavity 111a with the bottom surface of the grinding roller 21, which can further improve the blocking effect of the material stop 111 on the material and further reduce the falling speed of the material in the crushing zone 21a, thereby achieving higher crushing efficiency.
[0075] Furthermore, since one end of the material storage chamber 111a is open, the material can continue to fall towards the bottom of the shell 10 after passing through the material storage chamber 111a.
[0076] The fine grinding device of this application embodiment includes a housing 10, a grinding roller assembly 20, and a first drive assembly 30. The grinding roller assembly 20 includes a plurality of grinding rollers 21 spaced apart in a vertical direction. Each grinding roller 21 forms a grinding zone 21a spaced apart from the inner sidewall of the housing 10. The bottom end of the grinding zone 21a has a material outlet 21b. The housing 10 has a plurality of stopping portions 111, each of which is spaced apart in a vertical direction and corresponds to a grinding zone 21a. At least a portion of the stopping portion 111 extends to the bottom side of the corresponding material outlet 21b and is spaced apart from the material outlet 21b. Thus, the stopping portion 111 can obstruct the material falling from the material outlet 21b, causing the material passing through the grinding zone 21a to accumulate on the stopping portion 111. This causes the material descent speed in the grinding zone 21a to stop, the material flow rate to slow down, and the material layer crushed by the grinding rollers 21 to become very thick, thus increasing the number of times any piece of material is crushed. This allows for a significant increase, even doubling, of production capacity, which in turn significantly reduces power consumption and wear parts wear. Simultaneously, materials can be ground finer, and the thicker material layer results in better particle shape. In other words, the fine grinding equipment of this application allows materials to undergo more grinding cycles, resulting in a better grinding effect, thereby increasing product output, reducing energy consumption, and achieving finer particle size. Furthermore, the reduced falling speed of the material as it passes through the grinding zone 21a, and the accumulation at the stop section 111, results in a thicker material layer in the grinding zone 21a. This reduces direct collision between the grinding rollers 21 and the housing 10, thereby reducing equipment wear and damage, and decreasing operating noise. In addition, by arranging multiple grinding rollers 21 at vertical intervals and correspondingly providing stop sections 111 on the bottom side of the material inlet 21b in each grinding zone 21a, the falling speed of the material in each grinding zone 21a can be significantly reduced, and the thickness of the material layer can be increased to further improve the grinding effect.
[0077] In one embodiment, please refer to Figure 4 The grinding zone 21a is recessed towards the inner wall of the housing 10, so that the vertical cross-section of the grinding zone 21a is an arc-shaped cross-section that bends towards the inner wall of the housing 10. This increases the vertical extension length of the grinding zone 21a, thereby further improving the grinding effect.
[0078] In fact, the fact that the rolling zone 21a is recessed towards the inner wall of the housing 10 means that, at the rolling zone 21a, the inner wall of the housing 10 is recessed towards the side away from the grinding roller 21, while the grinding roller 21 protrudes towards the side closer to the inner wall of the housing 10, so that the vertical cross-section of the rolling zone 21a is a curved arc cross-section.
[0079] When a material storage cavity 111a is formed, the specific shape of the material storage cavity 111a can be set according to the actual situation.
[0080] For example, please see Figure 4 The material storage cavity 111a adjacent to the compaction zone 21a extends horizontally. That is to say, the material storage cavity 111a extends horizontally and does not bend with the compaction zone 21a. This method can improve the material storage effect.
[0081] In one embodiment, please refer to Figure 3 The compaction zone 21a is recessed towards the inner wall of the shell 10, so that the vertical cross-section of the compaction zone 21a is a straight cross-section that is recessed towards the inner wall of the shell 10 and extends vertically. In other words, the compaction zone 21a is recessed relative to the stop part 111, and its vertical cross-section is a straight cross-section that extends vertically. This can improve the material stacking effect.
[0082] In one embodiment, please refer to Figures 2 to 4 The housing 10 includes a liner 11 with a crushing space 11a. The liner 11 includes multiple plate portions 112 and multiple stop portions 111. The stop portions 111 are correspondingly disposed at the bottom ends of the plate portions 112. Each plate portion 112 and the stop portion 111 together form the crushing space 11a. The stop portions 111 protrude from the plate portions 112 toward the crushing space 11a. The grinding roller 21 is located in the crushing space 11a and forms a crushing zone 21a corresponding to each plate portion 112. Thus, by the cooperation of the plate portions 112 and the grinding roller 21, the crushing zone 21a can be formed to achieve crushing and crushing of materials.
[0083] Specifically, each plate portion 112 and each stop portion 111 of the liner 11 together enclose a rolling space 11a, and each grinding roller 21 is located in the rolling space 11a. Under the driving action of the first driving assembly 30, each grinding roller 21 can rotate around the inner circumference of the corresponding plate portion 112.
[0084] The material stop part 111 protrudes toward the side of the rolling space 11a relative to the plate part 112, and the two together form a stepped surface to slow down the falling speed of the material.
[0085] For example, the stop portion 111 extends circumferentially along the bottom edge of the corresponding plate portion 112 to form an annular stepped surface together with the corresponding plate portion 112.
[0086] Specifically, the material stop 111 has an annular structure that fits against the bottom surface of the plate body 112 to form an annular stepped surface. Thus, during the rotation of the grinding roller 21 around the inner circumference of the plate body 112, the material stop 111 can always block the material in the crushing zone 21a between the grinding roller 21 and the plate body 112, thereby reducing the falling speed of the material.
[0087] It should be noted that the stop part 111 and the plate part 112 can be integrally formed or separately formed. Therefore, the liner plate 11 can also be integrally formed or separately formed.
[0088] In one embodiment, please refer to Figure 6 and Figure 7 In the adjacent stop section 111 and the adjacent plate section 112, the inner diameter of the top stop section 111 is larger than the inner diameter of the bottom stop section 111, and the inner diameter of the top plate section 112 is larger than the inner diameter of the bottom plate section 112, so that the vertical section of the compaction space 11a is a stepped section.
[0089] In other words, from the top to the bottom, the inner diameter of each stop part 111 gradually decreases, and the inner diameter of each plate part 112 also gradually decreases. As a result, the vertical cross section of the rolling space 11a can be made to have a stepped cross section, which can realize multi-stage grinding and improve the grinding effect.
[0090] It should be noted that the specific extension direction of the vertical section of the compaction zone 21a can be set according to the actual situation.
[0091] For example, within the compaction space 11a, the vertical section of the compaction zone 21a extends in the vertical direction. That is, while the vertical section of the compaction space 11a is generally a stepped cross-section, the vertical section of the compaction zone 21a is a straight cross-section extending in the vertical direction. This simplifies the structure of the liner 11 and facilitates its processing and manufacturing.
[0092] For example, within the compaction space 11a, the vertical section of the compaction zone 21a extends at an angle relative to the vertical direction. That is, while the overall vertical section of the compaction space 11a is a stepped section, the vertical section of the compaction zone 21a is an inclined section at a certain angle to the vertical direction. This enhances the compaction effect.
[0093] It should be noted that the inner diameter of the stop part 111 refers to the diameter of a portion of the area enclosed by the stop part 111 to form the compaction space 11a. The inner diameter of the plate body part 112 refers to the diameter of a portion of the area enclosed by the plate body part 112 to form the compaction space 11a.
[0094] In one embodiment, please refer to Figure 2 and Figure 5 The housing 10 includes a housing body 12 and a liner 11 disposed inside the housing body 12. The liner 11 has a crushing space 11a and a stopping part 111. The grinding roller 21 is located in the crushing space 11a. A crushing area 21a is formed between the grinding roller 21 and the inner sidewall of the liner 11. A portion of the housing body 12 at the bottom end of the liner 11 protrudes to form a positioning step 121. The liner 11 abuts against the positioning step 121.
[0095] Specifically, the positioning step 121 is used to support the liner 11, which can improve the structural stability of the liner 11 during the grinding process and prevent the liner 11 from being misaligned and colliding with the grinding roller 21.
[0096] In fact, the first drive assembly 30 drives the grinding roller assembly 20 to rotate at least a portion of its area, so that the grinding roller 21 can rotate circumferentially around the inner sidewall of the liner 11, thereby forming a crushing zone 21a with the inner sidewall of the liner 11 to crush the material.
[0097] It should be noted that the mating surface between the liner 11 and the shell body 12 can be a curved surface extending in the vertical direction or a relatively inclined curved surface.
[0098] For example, please see Figure 2 and Figure 3 The outer wall of the liner 11 and the side wall of the shell body 12 extend in the vertical direction. Specifically, the outer wall of the liner 11 and the side wall of the shell body 12 are attached to each other, and both adopt curved surfaces (such as cylindrical surfaces) that extend in the vertical direction, which facilitates processing and manufacturing.
[0099] For example, please refer to Figure 5 and Figure 6 The side wall of the shell body 12 gradually slopes towards the liner 11 from top to bottom, and the outer wall of the liner 11 gradually slopes towards the crushing space 11a from top to bottom.
[0100] Specifically, the side wall of the shell body 12 and the outer wall of the liner 11 are both curved surfaces that gradually slope inward from one end to the other. This makes the liner 11 fit more firmly with the shell body 12 and prevents the liner 11 from being misaligned due to the rotation of the grinding roller 21.
[0101] It is understandable that the side wall of the shell body 12 and the outer wall of the liner 11 have the same inclination, which facilitates a perfect fit between the two.
[0102] In one embodiment, please refer to Figure 2 and Figure 6 The grinding roller assembly 20 also includes a rotating body 22 and one or more rotating shafts 23 passing through the rotating body 22. The rotating shafts 23 extend in a vertical direction, and a plurality of grinding rollers 21 are rotatably sleeved on the rotating shafts 23. The first drive assembly 30 is drivenly connected to the rotating body 22 to make the rotating body 22 rotate.
[0103] Specifically, the first drive assembly 30 drives the rotating body 22 to rotate around its own rotation axis 23. Since the rotation axis 23 passes through the rotating body 22, it can rotate around the rotation axis 23 of the rotating body 22 as the rotating body 22 rotates. Thus, driven by the rotation axis 23, the grinding roller 21 can also be driven to rotate around the rotation axis 23 of the rotating body 22, thereby achieving the purpose of rotating the grinding roller 21 along the inner circumference of the housing 10.
[0104] It should be noted that the grinding roller 21 is not fixedly connected to the rotating shaft 23, but is rotatably sleeved on the rotating shaft 23, and the inner diameter of the grinding roller 21 is larger than the outer diameter of the rotating shaft 23. Therefore, when the grinding roller 21 rotates along the inner circumference of the housing 10 to crush the material in the crushing zone 21a, a centrifugal force is generated on the grinding roller 21, causing the outer surface of the grinding roller 21 to press against the material in the crushing zone 21a, and then against the housing 10, creating an interaction that crushes the material. Simultaneously, during the crushing process, the material generates a frictional torque on the grinding roller 21, allowing the grinding roller 21 to rotate both along the inner circumference of the housing 10 and around the rotating shaft 23, resulting in better material crushing and further improving the crushing effect.
[0105] Furthermore, since the inner diameter of the grinding roller 21 is larger than the outer diameter of the rotating shaft 23, the grinding roller 21 can move relative to the rotating shaft 23 in all directions (front, back, left, and right). When the first drive assembly 30 drives the rotating body 22 to rotate around its own rotating shaft 23, the grinding roller 21 will adhere to the housing 10 towards the side closer to the housing 10 under the action of centrifugal force. When the particle size of the material in the crushing zone 21a is large, it can retract towards the side away from the housing 10.
[0106] In one embodiment, please refer to Figure 2 and Figure 6 The rotating body 22 includes a spacer platform 221 and a main shaft 222 extending in the vertical direction. The spacer platform 221 is spaced on the main shaft 222. The rotating shaft 23 passes through each spacer platform 221. Grinding rollers 21 are respectively provided at the interval between two adjacent spacer platforms 221. The first drive assembly 30 is drivenly connected to the main shaft 222.
[0107] Specifically, the first drive assembly 30 drives the main shaft 222 to rotate, thereby driving each spaced platform 221 to rotate, which in turn drives the rotating shaft 23 and each grinding roller 21 to rotate.
[0108] By setting multiple interval platforms 221 at intervals, the grinding rollers 21 can be separated in the vertical direction to prevent the grinding rollers 21 from interfering with each other during rotation, thereby affecting the crushing effect of the grinding rollers 21.
[0109] In one embodiment, please refer to Figure 7 and Figure 8 ,That Figure 7 In the middle, the grinding roller 21 has an inverted conical cross section, and the mating surface of the plate body 112 with it also has a corresponding oblique conical surface. Figure 8 The intermediate grinding roller 21 has a conical cross-section, and the corresponding part of the plate body 112 also has a corresponding oblique conical surface. The difference is that multiple grinding rollers 21 are stacked together, and there is no spacer platform 221 between adjacent grinding rollers 21. The advantage of the conical cross-section of the grinding roller 21 is that its grinding surface is lengthened, which is conducive to increasing output and grinding materials into finer particles.
[0110] In the above embodiments, the portion above the feed inlet 10a can also be removed, namely the powder classifier 40 and its auxiliary components and the suction port 10b, etc.
[0111] For example, the fine grinding equipment also includes a scraper 60 disposed at the bottom of the grinding roller assembly 20, and the housing 10 also has a discharge port 50 located on the bottom side of the grinding roller assembly 20. The scraper 60 can rotate with the grinding roller assembly 20 to discharge the ground material through the discharge port 50 into the housing 10.
[0112] In other words, the material fed into the feed inlet 10a is ground by the grinding rollers 21 carried by the grinding roller assembly 20. The ground material falls to the bottom and is scraped into the discharge outlet 50 by the scraper block 60 and discharged from the machine. The material discharged from the machine can directly become the product, or it can be separated into qualified fine particles and coarse particles by an external sorting device. The coarse particles can be returned to the feed inlet 10a for further grinding.
[0113] In one embodiment, a first drive assembly 30 is disposed on the upper part of the liner 11 of the housing 10 and the grinding roller assembly 20, and at least a portion of the housing 10 located on the bottom side of the grinding roller assembly 20 is open to allow the ground material to be discharged.
[0114] In other words, the first drive assembly 30 can also be placed in the upper part of the liner 11 and the grinding roller assembly 20, and the ground material is discharged directly from the bottom. The scraper 60 and the discharge port 50 at the bottom can be eliminated.
[0115] In the description of this application, the references to terms such as "in one embodiment," "in some embodiments," "in a specific embodiment," or "exemplary," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the embodiments of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine the different embodiments or examples described in this application, as well as the features of the different embodiments or examples.
[0116] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application are included within the scope of protection of this application.
Claims
1. A fine grinding apparatus characterized by comprising: The application relates to a shell, a mill roller assembly, a first driving assembly, and a stopper. The shell has an inlet; The mill roller assembly is arranged in the shell and comprises a plurality of mill rollers arranged in a vertical direction, each mill roller and an inner side wall of the shell form a rolling area, the bottom end of the rolling area has a material passing port, and the inlet is located at the top side of the mill roller assembly. The first driving assembly is drivingly connected with the mill roller assembly to make the mill rollers rotate around the inner periphery of the shell. The shell has a plurality of stoppers arranged in the vertical direction and corresponding to the rolling areas, and the stoppers at least partially extend to the bottom side of the corresponding material passing ports.
2. The refining apparatus of claim 1, wherein The stoppers at least partially extend to the bottom side of the corresponding mill rollers and form a material stacking cavity between the bottom surface of the mill roller and the stopper, one end of the material stacking cavity is communicated with the rolling area, and the other end of the material stacking cavity is open.
3. A refining device according to claim 1 or 2, characterized in that The rolling area is recessed towards the side close to the inner side wall of the shell, so that the vertical section of the rolling area is an arc-shaped section curved towards the side of the inner side wall of the shell; or The rolling area is recessed towards the side close to the inner side wall of the shell, and the vertical section of the rolling area is a linear section recessed towards the side of the inner side wall of the shell, and the linear section extends along the vertical direction.
4. The fine grinding apparatus according to claim 1 or 2, characterized by The shell comprises a liner plate having a rolling space, the liner plate comprises a plurality of plate body parts and a plurality of stoppers, the stoppers are arranged at the bottom end of the plate body parts one by one, each plate body part and the stopper jointly form the rolling space, the stopper protrudes towards the side of the rolling space relative to the plate body part, and the mill roller is located in the rolling space and forms the rolling area one by one with the plate body part.
5. The fine grinding apparatus of claim 4, wherein In the adjacent stoppers and the adjacent plate body parts, the inner diameter of the stopper at the top side is greater than that of the stopper at the bottom side, and the inner diameter of the plate body part at the top side is greater than that of the plate body part at the bottom side, so that the vertical section of the rolling space is a stepped section.
6. The fine grinding apparatus of claim 5, wherein In the rolling space, the vertical section of the rolling area extends along the vertical direction; or In the rolling space, the extending direction of the vertical section of the rolling area is inclined relative to the vertical direction.
7. The fine grinding apparatus of claim 5 wherein, The stopper extends along the bottom edge of the corresponding plate body part in a circumferential direction to jointly form an annular stepped surface with the corresponding plate body part.
8. The fine grinding apparatus of claim 1 or 2, wherein The shell comprises a shell body and a liner plate arranged in the shell body, the liner plate has a rolling space and the stopper, the mill roller is located in the rolling space, and the mill roller and the inner side wall of the liner plate form the rolling area, The part of the shell body located at the bottom end of the liner plate protrudes to form a positioning step, and the liner plate abuts on the positioning step.
9. The fine grinding apparatus of claim 8, wherein, The outer wall surface of the liner plate and the side wall surface of the shell body extend along the vertical direction; or The side wall surface of the shell body gradually inclines towards the side of the liner plate from top to bottom, and the outer wall surface of the liner plate gradually inclines towards the side of the rolling space from top to bottom.
10. The fine grinding apparatus of claim 4 wherein, The mill roller is a reverse truncated cone surface or a normal truncated cone surface, and the corresponding plate body part is a corresponding inclined cone surface.
11. The fine grinding apparatus of claim 1 or 2, wherein The mill roller assembly further comprises a rotating body and one or more rotating shafts penetrating through the rotating body and extending along the vertical direction, and a plurality of the mill rollers are rotatably sleeved on the rotating shafts, and the first driving assembly is drivingly connected with the rotating body to enable the rotating body to rotate.
12. The fine grinding apparatus of claim 11, wherein, The rotating body comprises a main shaft extending along the vertical direction and a plurality of interval platforms sleeved on the main shaft, and the rotating shafts penetrate through the interval platforms, and the mill rollers are arranged at intervals between two adjacent interval platforms.
13. The fine grinding apparatus of claim 1 or 2, wherein The shell has a suction port located at the top side of the material inlet port and an airflow inlet communicating with the outside, and the shell further comprises a powder selection device arranged at the suction port, and an airflow flow path is formed between the airflow inlet and the suction port to flow through the mill roller assembly and the powder selection device.
14. The fine grinding apparatus of claim 13, wherein, The shell comprises a shell body and a lining plate arranged in the shell body, the lining plate has a crushing space and the material stopping part, the mill rollers are located in the crushing space, and the mill rollers and the inner side wall of the lining plate form the crushing area; the part of the shell body near the lining plate is penetrated to form an annular flow channel around the mill roller assembly in the circumferential direction, and the annular flow channel is respectively communicated with the airflow inlet and the suction port at opposite ends along the top-bottom direction.
15. The fine grinding apparatus of claim 1 or 2, wherein The fine grinding device further comprises a scraper arranged at the bottom of the mill roller assembly, and the shell further has a material outlet located at the bottom side of the mill roller assembly, the scraper can rotate with the mill roller assembly to discharge the ground material out of the shell through the material outlet; or, The first driving assembly is arranged at the upper part of the lining plate of the shell and the mill roller assembly, and at least part of the area of the shell at the bottom side of the mill roller assembly is open to discharge the ground material.