A superfine grinding device suitable for cement and superfine mineral powder

Abstract

This disclosure relates to the technical field of grinding equipment. One embodiment of this disclosure provides an ultrafine grinding device suitable for cement and ultrafine mineral powder, comprising: a shell and a feeding auger connected to the top of the shell; a main shaft rotatably connected to the top of the shell; a grinding discharge assembly disposed inside the shell; a pretreatment assembly disposed at the top of the shell; the pretreatment assembly including a filter plate disposed at the top of the shell; a bushing rotatably mounted on the main shaft; a plurality of crushing rods disposed on the side surface of the bushing; a drive motor disposed at the top of the shell; a drive gear disposed at the output end of the drive motor; and a driven gear disposed on the side surface of the bushing, with the drive gear meshing with the driven gear. This technical solution solves the significant drawbacks of traditional grinding devices in the prior art, such as limited crushing function and untimely discharge due to structural design defects, which seriously restricts production efficiency and powder quality.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the technical field of grinding equipment, and more specifically, to an ultrafine grinding device suitable for cement and ultrafine mineral powder. Background Technology

[0002] In the fields of cement and ultrafine mineral powder processing, ultrafine grinding technology is crucial for improving the performance of powder materials. However, due to structural design defects, traditional grinding equipment has significant drawbacks such as limited grinding function and untimely material discharge, which seriously restricts production efficiency and powder quality.

[0003] The existing equipment suffers from structural deficiencies in two aspects: First, the crushing structure uses a simple combination of a single rotor or a fixed grinding disc, lacking multi-stage crushing chambers and differentiated grinding components, making it unable to adapt to the hardness differences between cement clinker and mineral powder. For example, a single grinding disc can only achieve primary crushing through friction and extrusion. When facing high-hardness cement clinker, coarse particles are difficult to break effectively, while ultrafine mineral powder is prone to agglomeration due to over-grinding, resulting in uneven particle size distribution. Furthermore, the grinding area is prone to overheating due to the lack of heat dissipation structures, exacerbating particle adhesion. Second, the discharge system relies on gravity flow or single gate control, lacking dynamic monitoring and automatic discharge structures within the grinding chamber. When material accumulates to a certain height, it cannot be discharged in a timely manner through structural linkage, not only prolonging grinding time but also causing "over-grinding" due to material retention. Moreover, the discharge port lacks a flow guide design, easily generating dust when the powder is discharged. In addition, the crushing and discharge stages are independent of each other, lacking a linkage adjustment mechanism. When changing material types, it is necessary to stop the machine and manually adjust the crushing parameters and gate opening, which is cumbersome and inefficient.

[0004] With the increasing demand for ultrafine powders in high-performance building materials, traditional equipment, due to structural defects such as "lack of crushing levels and lagging discharge control," can no longer meet the requirements of modern production for "uniform grinding and efficient discharge." There is an urgent need to solve the technical bottlenecks in the grinding process through innovative designs of multi-stage crushing chambers and intelligent discharge structures. Utility Model Content

[0005] To overcome the above-mentioned defects, the embodiments of this disclosure provide an ultrafine grinding device suitable for cement and ultrafine mineral powder, which solves the technical problems of traditional grinding devices in the prior art, which have significant drawbacks such as single grinding function and untimely material discharge due to structural design defects, which seriously restrict production efficiency and powder quality.

[0006] According to one aspect, at least one embodiment of this disclosure provides an ultrafine grinding apparatus suitable for cement and ultrafine mineral powder, comprising:

[0007] The housing and the feed auger, the feed auger being connected to the top of the housing;

[0008] The main shaft and the grinding and discharging assembly are provided, wherein the main shaft is rotatably connected to the top of the housing, and the grinding and discharging assembly is disposed inside the housing;

[0009] A pretreatment assembly is disposed at the top inside the housing;

[0010] The pretreatment component includes a filter plate disposed at the top of the housing, and a bushing is rotatably connected to the main shaft, with a plurality of crushing rods disposed on the side surface of the bushing.

[0011] As a further technical solution, a drive motor is provided on the top of the housing, a drive gear is provided at the output end of the drive motor, a driven gear is provided on the side surface of the bushing, and the drive gear meshes with the driven gear.

[0012] As a further technical solution, the grinding and discharging assembly includes a top frame, which is fixed to the top of the outer shell. A main motor is mounted on the top frame, and the output end of the main motor is connected to the main shaft. Several grinding blocks are mounted on the lower end of the main shaft.

[0013] As a further technical solution, an air inlet is provided at the bottom of the outer shell, an air intake cover is provided at the bottom of the outer shell, an air intake pipe is fitted and connected to the bottom of the outer shell, and a number of dispersion holes are provided on the side surface of the air intake cover.

[0014] As a further technical solution, the upper end of the side surface of the outer shell protrudes outward, a partition is provided on the inner wall of the protruding part at the top of the outer shell, the surface of the partition is provided with mesh, and a discharge pipe is provided at the top of the outer shell.

[0015] As a further technical solution, a partition is provided at the top inside the housing, which covers the drive gear and the driven gear inside.

[0016] As a further technical solution, the partition is distributed in a circular shape around the top of the outer shell.

[0017] As a further technical solution, the outer surface of the grinding block is an arc-shaped structure with an inclined transition.

[0018] The beneficial effects of the embodiments disclosed herein are as follows:

[0019] 1. In this disclosure, the pretreatment component initially screens the ore through a filter plate, and the drive motor drives the bushing and crushing rod to rotate at high speed via gear transmission. The crushing rod impacts and shears the ore, and the generated eddy current causes the ore to be crushed by multiple collisions. This solves the problem of the single crushing function of traditional devices, provides materials of suitable particle size for subsequent grinding, improves grinding efficiency, and the cover protects the gear transmission to avoid wear on the ore.

[0020] 2. In this disclosure, the main motor of the grinding and discharge assembly drives the main shaft and grinding blocks to rotate at high speed. The arc-shaped surface of the grinding blocks allows the ore to enter the grinding zone. The ore is refined by friction and extrusion. The air intake system generates an upward airflow through the dispersion holes, which drives the ore powder to rise. The ultrafine ore powder is screened by the interlayer mesh and discharged from the discharge pipe. Large particles fall back and are ground again, realizing the linkage of grinding, screening and discharge, solving the problem of untimely discharge in traditional devices, and ensuring powder quality and discharge efficiency. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0022] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure;

[0023] Figure 2 This is an isometric drawing of the present disclosure;

[0024] Figure 3 This is an isometric sectional view of the present disclosure;

[0025] Figure 4 Appendix to this disclosure Figure 3 Enlarged view of part A in the middle;

[0026] In the diagram: 1. Outer shell; 2. Feed auger; 3. Main shaft; 4. Pretreatment assembly; 4-1. Filter plate; 4-2. Bushing; 4-3. Crushing rod; 4-4. Drive motor; 4-5. Drive gear; 4-6. Driven gear; 5. Grinding and discharging assembly; 5-1. Top frame; 5-2. Main motor; 5-3. Grinding block; 5-4. Air inlet; 5-5. Air inlet hood; 5-6. Air inlet pipe; 5-7. Dispersion hole; 5-8. Partition; 5-9. Mesh; 5-10. Discharge pipe; 6. Separator. Detailed Implementation

[0027] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0028] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0029] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0030] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are 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, they should not be construed as limitations on this disclosure.

[0032] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] like Figures 1-4 As shown, it illustrates an ultrafine grinding apparatus suitable for cement and ultrafine mineral powder according to an embodiment of the present disclosure, comprising:

[0034] The housing 1 and the feed auger 2 are connected to the top of the housing 1;

[0035] The main shaft 3 and the grinding and discharging assembly 5 are rotatably connected to the top of the housing 1, and the grinding and discharging assembly 5 is disposed inside the housing 1.

[0036] Pre-processing component 4, wherein the pre-processing component 4 is disposed at the top inside the housing 1;

[0037] The pretreatment component 4 includes a filter plate 4-1, which is disposed at the top inside the outer shell 1. A bushing 4-2 is rotatably connected to the main shaft 3. A plurality of crushing rods 4-3 are disposed on the side surface of the bushing 4-2. A drive motor 4-4 is disposed at the top of the outer shell 1. A drive gear 4-5 is disposed at the output end of the drive motor 4-4. A driven gear 4-6 is disposed on the side surface of the bushing 4-2. The drive gear 4-5 meshes with the driven gear 4-6.

[0038] In some examples, a pretreatment component 4 is designed to achieve effective crushing of the incoming ore. This component is based on a filter plate 4-1 located at the top inside the housing 1. The filter plate 4-1 can perform preliminary screening of the incoming ore, intercepting larger particles and ensuring that the ore entering the subsequent processing stages meets the particle size requirements. The bushing 4-2, which rotates and is mounted on the main shaft 3, is the core component of the pretreatment. Several crushing rods 4-3 distributed on the side surface of the bushing 4-2 can impact and shear the ore under the drive of the bushing 4-2.

[0039] The drive motor 4-4 at the top of the outer casing 1 meshes with the driven gear 4-6 on the side surface of the bushing 4-2 via the drive gear 4-5 at the output end, transmitting power to the bushing 4-2 and causing it to rotate at high speed. When the ore falls into the outer casing 1 through the feed auger 2, it first comes into contact with the high-speed rotating crushing rod 4-3. Under the impact force of the crushing rod 4-3, larger ore particles are crushed. At the same time, the high-speed movement of the crushing rod 4-3 generates a vortex effect, causing the ore to circulate in the top area inside the outer casing 1, colliding with the crushing rod 4-3 multiple times, further improving the crushing effect. Through the preliminary screening of the filter plate 4-1, the power transmission of the drive motor 4-4 and the gear transmission system, and the impact and vortex effect of the crushing rod 4-3, the pretreatment component 4 can fully crush the incoming ore, providing materials with suitable particle size for subsequent grinding processes, effectively improving the overall grinding efficiency.

[0040] like Figures 1-4As shown in the figure, the grinding and discharging assembly 5 proposed in this embodiment includes a top frame 5-1, which is fixed to the top of the outer shell 1. A main motor 5-2 is provided on the top frame 5-1, and the output end of the main motor 5-2 is connected to the main shaft 3. Several grinding blocks 5-3 are provided at the lower end of the main shaft 3. An air inlet 5-4 is provided at the bottom of the inner shell 1. An air inlet hood 5-5 is provided at the bottom of the inner shell 1. An air inlet pipe 5-6 is fitted and connected to the bottom of the outer shell 1. Several dispersion holes 5-7 are provided on the side surface of the air inlet hood 5-5. The upper part of the side surface of the outer shell 1 protrudes outward. A partition 5-8 is provided on the inner wall of the protruding part at the top of the inner shell 1. A mesh 5-9 is provided on the surface of the partition 5-8. A discharge pipe 5-10 is provided at the top of the outer shell 1.

[0041] In some examples, a grinding and discharge assembly 5 is designed to achieve the grinding of ore and discharge via upward air blowing. This assembly uses a top frame 5-1 fixed to the top of the housing 1 as its support structure. A main motor 5-2 mounted on the top frame 5-1 is connected to the main shaft 3 via its output end, providing rotational power to the main shaft 3 and the grinding blocks 5-3 at its lower end. When the main motor 5-2 starts, the grinding blocks 5-3 rotate at high speed under the drive of the main shaft 3, grinding the pre-treated ore. Through friction and compression between the grinding blocks 5-3 and the ore, the ore is further refined to the required ultrafine particle size.

[0042] The air inlet 5-4, air inlet hood 5-5, and air inlet pipe 5-6 at the bottom of the outer shell 1 constitute an air blowing system. External gas enters the air inlet hood 5-5 through the air inlet pipe 5-6, and is then evenly dispersed through the dispersion holes 5-7 on the side surface of the air inlet hood 5-5, forming an upward airflow. Under the action of the airflow, the ground mineral powder moves upward and passes through the partition 5-8 set on the inner wall of the protruding part at the top of the outer shell 1. The mesh 5-9 on the surface of the partition 5-8 can screen the mineral powder. Ultrafine mineral powder that meets the particle size requirements enters the discharge pipe 5-10 through the mesh 5-9 and is discharged; while larger mineral powder is intercepted by the partition 5-8 and falls back into the grinding area to continue grinding.

[0043] The grinding block 5-3 driven by the main motor 5-2 grinds the ore. Combined with the upward airflow generated by the air intake system to drive the ore powder movement, and the screening effect of the partition 5-8 and the mesh 5-9, the grinding and discharge assembly 5 realizes the grinding, screening and grading of the ore and airflow discharge, ensuring the production quality and discharge efficiency of ultrafine ore powder.

[0044] For example, such as Figure 3 As shown, a partition 6 is provided at the top inside the outer casing 1, which covers the drive gear 4-5 and the driven gear 4-6 inside.

[0045] In some examples, by providing a shroud 6, the transmission between the drive gear 4-5 and the driven gear 4-6 can be protected, preventing ore from entering and causing wear on the gears.

[0046] For example, such as Figure 3 As shown, the partitions 5-8 are distributed in a circular shape around the top of the outer shell 1.

[0047] In some examples, setting a week can increase coverage, resulting in better discharge and helping to intercept ore.

[0048] For example, such as Figure 3 As shown, the outer surface of the grinding block 5-3 is an arc-shaped structure with an inclined transition.

[0049] In some examples, the curved transition surface facilitates the downward rolling of the ore into the space between the grinding block 5-3 and the inner wall of the outer shell 1, which helps with the grinding process.

[0050] In actual use: The outer casing 1 is fixed, the feeding auger 2 is installed on the top of the outer casing 1, the main shaft 3 is rotatably connected to the top inside the outer casing 1, the filter plate 4-1 of the pretreatment assembly 4 is located at the top inside the outer casing 1, the bushing 4-2 is fitted onto the main shaft 3, the crushing rod 4-3 is fixed to the side surface of the bushing 4-2, the drive motor 4-4 meshes with the driven gear 4-6 of the bushing 4-2 via the drive gear 4-5, the top frame 5-1 of the grinding and discharging assembly 5 is fixed to the top of the outer casing 1, the main motor 5-2 is installed on the top frame 5-1 and connected to the main shaft 3, and the grinding blocks... 5-3 is located at the lower end of the main shaft 3. The air inlet hood 5-5 and the dispersion hole 5-7 are located at the bottom of the outer shell 1. The air inlet pipe 5-6 is connected to the bottom of the outer shell 1. The partition 5-8 and the mesh 5-9 are located on the inner wall of the protruding part at the top of the outer shell 1. The discharge pipe 5-10 is connected to the top of the outer shell 1. When in use, the feeding auger 2 feeds the material to the outer shell 1. The drive motor 4-4 drives the bushing 4-2 and the crushing rod 4-3 to crush the ore. The main motor 5-2 drives the main shaft 3 and the grinding block 5-3 to grind. The air inlet system blows air so that the ore powder is screened by the partition 5-8 and discharged from the discharge pipe 5-10.

[0051] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. An ultrafine grinding device suitable for cement and ultrafine mineral powder, characterized in that, include: The housing (1) and the feed auger (2) are connected to the top of the housing (1); The main shaft (3) and the grinding and discharging assembly (5) are rotatably connected to the top of the housing (1) and the grinding and discharging assembly (5) is disposed inside the housing (1). A pretreatment component (4) is disposed at the top inside the housing (1); The pretreatment component (4) includes a filter plate (4-1), which is disposed at the top inside the outer shell (1). A bushing (4-2) is rotatably connected to the main shaft (3), and a plurality of crushing rods (4-3) are provided on the side surface of the bushing (4-2).

2. The ultrafine grinding device for cement and ultrafine mineral powder according to claim 1, characterized in that, The top of the outer casing (1) is provided with a drive motor (4-4), the output end of the drive motor (4-4) is provided with a drive gear (4-5), the side surface of the bushing (4-2) is provided with a driven gear (4-6), and the drive gear (4-5) meshes with the driven gear (4-6).

3. The ultrafine grinding device for cement and ultrafine mineral powder according to claim 1, characterized in that, The grinding and discharging assembly (5) includes a top frame (5-1), which is fixed to the top of the outer shell (1). A main motor (5-2) is installed on the top frame (5-1), and the output end of the main motor (5-2) is connected to the main shaft (3). Several grinding blocks (5-3) are installed at the lower end of the main shaft (3).

4. The ultrafine grinding device for cement and ultrafine mineral powder according to claim 3, characterized in that, An air inlet (5-4) is provided at the bottom of the outer shell (1), an air intake cover (5-5) is provided at the bottom of the outer shell (1), an air intake pipe (5-6) is fitted and connected to the bottom of the outer shell (1), and a number of dispersion holes (5-7) are provided on the side surface of the air intake cover (5-5).

5. The ultrafine grinding device suitable for cement and ultrafine mineral powder according to claim 1, characterized in that, The upper part of the side surface of the outer shell (1) protrudes outward, and a partition (5-8) is provided on the inner wall of the protruding part at the top of the outer shell (1). The surface of the partition (5-8) is provided with mesh (5-9), and a discharge pipe (5-10) is provided on the top of the outer shell (1).

6. The ultrafine grinding device suitable for cement and ultrafine mineral powder according to claim 2, characterized in that, A cover (6) is provided at the top inside the housing (1), which covers the drive gear (4-5) and the driven gear (4-6) inside.

7. The ultrafine grinding device for cement and ultrafine mineral powder according to claim 5, characterized in that, The partitions (5-8) are arranged in a ring around the top of the outer shell (1).

8. The ultrafine grinding device for cement and ultrafine mineral powder according to claim 3, characterized in that, The outer surface of the grinding block (5-3) is an arc-shaped structure with an inclined transition.

Images