Micro mill

Abstract

The utility model discloses a micro pulverizer, and belongs to the field of slag processing devices. Comprising a box body, a flow dividing ring dividing an inner cavity of the box body into a crushing chamber and a grading chamber is arranged in the box body, a ceramic lining layer is arranged on the inner wall of the box body, a crushing mechanism is arranged in the crushing chamber, a grading wheel assembly is arranged in the grading chamber, and the crushing mechanism and the grading wheel assembly are ceramic parts; the smashing mechanism comprises an annular stator and a smashing disc connected with the lower driving mechanism, tooth-shaped protrusions are arranged on the annular stator, and the smashing disc rotates so that materials can be smashed between the smashing disc and the annular stator; the grading wheel assembly is connected with the upper driving mechanism and rotates above the smashing disc, and the grading wheel assembly rotates so that fine powder can be graded in the grading chamber and discharged through the material outlet. According to the utility model, the wear resistance of parts of the micronizer can be enhanced, so that the wear of the parts of the micronizer can be reduced, the parts of the micronizer are prevented from being excessively worn and damaged, and the normal service life of the micronizer is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of slag processing devices, in particular to a micro powder grinding machine. Background Art

[0002] Slag powder is a new type of admixture for high-performance concrete. It can greatly improve the strength of cement concrete and formulate ultra-high-strength cement concrete. It can effectively inhibit the alkali-aggregate reaction of cement concrete and significantly improve the alkali-aggregate reaction resistance and durability of cement concrete. At the same time, it can also improve various properties of concrete, such as resistance to seawater erosion, workability, density and impermeability. Before mixing the concrete, the slag needs to be ground into powder to facilitate more thorough mixing with the concrete.

[0003] An existing mechanical impact micro-powder mill for processing slag materials to prepare slag micro-powder, such as Figure 1 As shown, the pulverizer consists of an upper and lower section. The lower section is a lower housing for air supply, while the upper section is divided into a crushing chamber and a grading chamber by a diverter ring. The crushing chamber, consisting of a crushing disc and a toothed stator, crushes the material into fine powder. The grading chamber, consisting of a grading impeller, separates the fine powder into qualified and unqualified fine powder. Qualified fine powder is discharged through the material outlet and collected by a cyclone powder collector. Unqualified fine powder falls back along the inner wall of the diverter ring into the crushing chamber, where it continues to be crushed until the powder reaches the qualified level.

[0004] The grading spindle 15 is mounted inside the pulverizing spindle 19, rotating in opposite directions from the pulverizing spindle. This creates a complex structure and makes processing difficult. During the pulverizing process, the grinding blocks mounted on the pulverizing discs and the toothed stator mounted on the housing are the primary means of pulverization. However, the slag material being pulverized is relatively hard, and the high-speed impact of the material on the grinding blocks and stator can easily cause wear and tear on the grinding blocks, stator, grading impeller, and even the entire pulverizing chamber. This can damage the micro-powder mill components and shorten the mill's service life. Utility Model Content

[0005] In view of this, the purpose of the present invention is to solve the shortcomings and problems existing in the above-mentioned prior art, and to provide a micro powder mill to reduce the wear of components such as the grinding block, stator, grading impeller and even the entire grinding chamber of the micro powder mill, prevent excessive wear and damage of the components of the micro powder mill, and extend the normal service life of the micro powder mill.

[0006] An embodiment of the present utility model provides a micro powder grinding mill, comprising a box body, the bottom of which is provided with an opening for air supply, the box body being provided with a diverter ring for dividing the inner cavity of the box body into a crushing chamber and a grading chamber, the top of the box body being provided with a material outlet connected to the grading chamber; a ceramic lining layer is provided on the inner wall of the box body, a crushing mechanism is provided in the crushing chamber, and a grading wheel assembly is provided in the grading chamber, and the crushing mechanism and the grading wheel assembly are both ceramic parts; the crushing mechanism comprises an annular stator fixed to the inner wall of the box body, and a crushing disk connected to a lower driving mechanism and rotating around the central axis of the annular stator, the annular stator being provided with a tooth-shaped protrusion, the crushing disk rotates so that the material is crushed between the crushing disk and the annular stator; the grading wheel assembly is connected to the upper driving mechanism and rotates above the crushing disk, and the grading wheel assembly rotates so that the fine powder is graded in the grading chamber and discharged through the material outlet.

[0007] Furthermore, a grinding block is fixed on the upper end surface of the crushing disk, and the grinding block is a ceramic part; the crushing disk rotates to cause the grinding block to rotate relative to the annular stator to crush the material between the grinding block and the annular stator.

[0008] Furthermore, the diverter ring is a ceramic part and is fixed to the box body with a fixing screw; the diverter ring is a through-hole ring cone, wherein the end with the larger orifice is located at the top; the grading wheel assembly is installed in the diverter ring and can rotate around the central axis of the diverter ring.

[0009] Furthermore, the grading wheel assembly includes a grading hub, blades and a blade fixing ring. The center of the grading hub is provided with an axial hole connected to the upper driving mechanism. The blades are evenly spaced and distributed in an annular manner on the grading hub. The upper end surfaces of the blades are connected together through the blade fixing ring. The grading hub, the blades and the blade fixing ring are an integrally formed part.

[0010] Furthermore, the upper driving mechanism includes a grading spindle and a grading bearing assembly, the grading bearing assembly is covered by a ceramic bearing seat, the grading spindle is installed in the grading chamber through the grading bearing assembly, one end of the grading spindle is connected to the axial hole of the grading wheel hub in the grading wheel assembly, and the other end extends from the top of the box and is connected to the transmission wheel connected to the power source.

[0011] Furthermore, the lower driving mechanism includes a crushing main shaft and a crushing bearing assembly, the crushing main shaft is installed in the crushing chamber through the crushing bearing assembly, one end of the crushing main shaft is connected to the crushing disk, and the other end extends from the bottom of the box and is connected to a transmission wheel connected to the power source.

[0012] Furthermore, the box body is provided with a material conveying mechanism for conveying the material to the crushing chamber, the material conveying mechanism includes a feeding motor, a reducer and a feeding spiral auger fixed in the ceramic hopper shell, the ceramic hopper shell is provided with a hopper, the feeding motor is connected to the feeding spiral auger through the reducer, and the feeding spiral auger is an integrally formed ceramic part.

[0013] Furthermore, the material outlet and the crushing disk are provided with the ceramic lining layer, and each of the ceramic lining layers is an integrally formed ceramic part.

[0014] Furthermore, the ceramic lining layer, the grading wheel assembly and the pulverizing mechanism are made of alumina or zirconia ceramic parts.

[0015] The technical solution provided by the embodiments of the present utility model has the following beneficial effects:

[0016] The utility model provides a ceramic lining layer on the inner wall of the box, a crushing mechanism in the crushing chamber, and a grading wheel assembly in the grading chamber. The crushing mechanism and the grading wheel assembly are both ceramic parts, which can enhance the wear resistance of the micro powder mill components, thereby reducing the wear of the micro powder mill components, preventing excessive wear and damage of the micro powder mill components, and extending the normal service life of the micro powder mill. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the prior art.

[0018] Figure 2 It is a structural schematic diagram of a micro powder grinding mill provided by an embodiment of the present utility model.

[0019] Figure 3 It is a structural schematic diagram of a grading wheel assembly provided in an embodiment of the present utility model.

[0020] Figure 4 It is a structural schematic diagram of the annular stator provided in an embodiment of the utility model.

[0021] Among them, 1-opening; 2-box; 3-crushing chamber; 4-grading chamber; 5-diverter ring; 6-material outlet; 7-ceramic lining layer; 8-annular stator; 9-crushing disc; 10-grinding block; 11-fixed screw; 12-grading hub; 13-blade; 14-blade fixing ring; 15-grading spindle; 16-grading bearing assembly; 17-ceramic bearing seat; 18-drive wheel; 19-crushing spindle; 20-crushing bearing assembly; 21-feeding motor; 22-reducer; 23-ceramic hopper shell; 24-feeding spiral auger; 25-hopper. DETAILED DESCRIPTION

[0022] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will further describe the embodiments of the present invention with reference to the accompanying drawings. The following describes a preferred embodiment of the present invention among multiple possible embodiments, which is intended to provide a basic understanding of the present invention, but is not intended to identify the key or decisive elements of the present invention or to limit the scope of protection to be provided.

[0023] refer to Figures 1 to 4 The micro-powder grinding mill comprises a housing 2 with an opening 1 at the bottom for air supply. A diverter ring 5 is disposed within the housing 2, dividing the interior of the housing 2 into a crushing chamber 3 and a grading chamber 4. A material outlet 6, communicating with the grading chamber 4, is located at the top of the housing 2. A ceramic lining 7 is provided on the inner wall of the housing 2. A crushing mechanism is located within the crushing chamber 3, and a grading wheel assembly is located within the grading chamber 4. Both the crushing mechanism and the grading wheel assembly are made of ceramic. The crushing mechanism comprises an annular stator 8 fixed to the inner wall of the housing 2, having tooth-shaped projections thereon, and a pulverizing disc 9 connected to a lower drive mechanism and rotating about the central axis of the annular stator 8. The pulverizing disc 9 rotates, pulverizing the material between the pulverizing disc 9 and the annular stator 8. The grading wheel assembly is connected to the upper drive mechanism and rotates above the pulverizing disc 9. The grading wheel assembly rotates, classifying the fine powder within the grading chamber 4 and discharging it through the material outlet 6.

[0024] With the above structure, a ceramic lining layer 7 is provided on the inner wall of the box body 2, a crushing mechanism is provided in the crushing chamber 3, and a classifying wheel assembly is provided in the grading chamber 4. The crushing mechanism and the classifying wheel assembly are both ceramic parts, which can enhance the wear resistance of the micro powder mill components, thereby reducing the wear of the micro powder mill components, preventing excessive wear and damage of the micro powder mill components, and extending the normal service life of the micro powder mill.

[0025] Specifically, a ceramic grinding block 10 is fixed to the upper end surface of the pulverizing disc 9. The pulverizing disc 9 rotates to rotate the grinding block 10 relative to the annular stator 8, thereby pulverizing the material between the grinding block 10 and the annular stator 8.

[0026] Specifically, the diverter ring 5 is a ceramic component secured to the housing 2 by a fixing screw 11. The diverter ring 5 is a conical ring with a larger opening at the top. A classifying wheel assembly is mounted within and rotates about the central axis of the diverter ring 5. By using the diverter ring 5, unqualified fine powder can fall along the inner wall of the diverter ring 5 back into the pulverizing chamber 3 for further pulverization.

[0027] Specifically, the grading wheel assembly is conical in shape and comprises a grading hub 12, blades 13, and a blade retaining ring 14. A central axial hole is defined in the grading hub 12, connecting it to the upper drive mechanism. The blades 13 are evenly spaced and arranged in an annular pattern on the grading hub 12. The upper end surfaces of the blades 13 are connected by the blade retaining ring 14. The grading hub 12, blades 13, and blade retaining ring 14 are bonded together with glaze and then sintered into a single, integrated component, ensuring structural strength and grading accuracy.

[0028] Specifically, the upper drive mechanism includes a grading spindle 15 and a grading bearing assembly 16. The grading bearing assembly 16 is covered by a ceramic bearing seat 17. The grading spindle 15 is mounted in the grading chamber 4 via the grading bearing assembly 16. One end of the grading spindle 15 connects to the axial hole of the grading hub 12 in the grading wheel assembly, while the other end extends from the top of the housing 2 and connects to a transmission wheel 18 connected to a power source. With this structure, the grading wheel assembly is independently driven.

[0029] Specifically, the lower drive mechanism includes a pulverizing spindle 19 and a pulverizing bearing assembly 20. The pulverizing spindle 19 is mounted within the pulverizing chamber 3 via the pulverizing bearing assembly 20. One end of the pulverizing spindle 19 is connected to the pulverizing disc 9, while the other end extends from the bottom of the housing 2 and connects to a drive wheel 18 connected to the power source. This structure allows the pulverizing disc 9 to be driven independently and separated from the pulverizing bearing assembly used in conventional technology, simplifying the structure, reducing manufacturing complexity, and improving equipment stability.

[0030] Specifically, the housing 2 is equipped with a material conveying mechanism that transports material to the crushing chamber 3. The material conveying mechanism includes a feed motor 21, a reducer 22, and a feed auger 24 secured within a ceramic hopper housing 23. The ceramic hopper housing 23 is provided with a hopper 25. The feed motor 21 is in transmission connection with the feed auger 24 via the reducer 22. The feed auger 24 is a one-piece, fired ceramic component.

[0031] Specifically, a ceramic lining layer 7 is provided on the material outlet 6 and the crushing disk 9. Each ceramic lining layer 7 is an integrally formed ceramic part.

[0032] In a preferred embodiment, the ceramic lining layer 7, the classifying wheel assembly, and the pulverizing mechanism are made of alumina or zirconia ceramics. Alumina or zirconia ceramics have high wear resistance, and the use of alumina or zirconia ceramics in the ceramic lining layer 7, the classifying wheel assembly, and the pulverizing mechanism can further reduce wear of the micro powder mill.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A micro powder grinding mill comprising a housing, wherein the bottom of the housing is provided with an opening for supplying air, the housing is provided with a diverter ring for dividing the inner cavity of the housing into a grinding chamber and a classification chamber, and the top of the housing is provided with a material outlet communicating with the classification chamber; characterized in that: A ceramic lining layer is provided on the inner wall of the box body, a crushing mechanism is provided in the crushing chamber, and a grading wheel assembly is provided in the grading chamber, and both the crushing mechanism and the grading wheel assembly are ceramic parts; the crushing mechanism includes an annular stator fixed to the inner wall of the box body, and a crushing disk connected to the lower driving mechanism and rotating around the central axis of the annular stator, the annular stator is provided with tooth-shaped protrusions, the crushing disk rotates so that the material is crushed between the crushing disk and the annular stator; the grading wheel assembly is connected to the upper driving mechanism and rotates above the crushing disk, and the grading wheel assembly rotates so that the fine powder is classified in the grading chamber and discharged through the material outlet.

2. The micro powder grinding mill according to claim 1, wherein: A grinding block is fixed on the upper end surface of the pulverizing disk, and the grinding block is a ceramic piece; the pulverizing disk rotates to make the grinding block rotate relative to the annular stator, so as to pulverize the material between the grinding block and the annular stator.

3. The micro powder grinding mill according to claim 1, wherein: The diverter ring is a ceramic part and is fixed to the box body with a fixing screw; the diverter ring is a through-hole ring cone, wherein the end with the larger orifice is located at the top; the grading wheel assembly is installed in the diverter ring and can rotate around the central axis of the diverter ring.

4. The micro powder grinding mill according to any one of claims 1 to 3, characterized in that: The grading wheel assembly includes a grading hub, blades and a blade fixing ring. The center of the grading hub is provided with an axial hole connected to the upper driving mechanism. The blades are evenly distributed in an annular manner on the grading hub. The upper end surfaces of the blades are connected together by the blade fixing ring. The grading hub, the blades and the blade fixing ring are integrally formed.

5. The micro powder grinding mill according to claim 4, wherein: The upper driving mechanism includes a grading spindle and a grading bearing assembly, the grading bearing assembly is covered by a ceramic bearing seat, the grading spindle is installed in the grading chamber through the grading bearing assembly, one end of the grading spindle is connected to the axial hole of the grading wheel hub in the grading wheel assembly, and the other end extends from the top of the box and is connected to the transmission wheel connected to the power source.

6. The micro powder grinding mill according to claim 1, wherein: The lower driving mechanism includes a crushing main shaft and a crushing bearing assembly. The crushing main shaft is installed in the crushing chamber through the crushing bearing assembly. One end of the crushing main shaft is connected to the crushing disk, and the other end extends from the bottom of the box and is connected to a transmission wheel connected to a power source.

7. The micro powder grinding mill according to claim 1, wherein: The box body is provided with a material conveying mechanism for conveying the material to the crushing chamber. The material conveying mechanism includes a feeding motor, a reducer and a feeding spiral auger fixed in the ceramic hopper shell. The ceramic hopper shell is provided with a hopper. The feeding motor is connected to the feeding spiral auger through the reducer. The feeding spiral auger is an integrally formed ceramic part.

8. The micro powder grinding machine according to any one of claims 1, 2, 3 or 6, characterized in that: The material outlet and the crushing disk are provided with the ceramic lining layers, and each of the ceramic lining layers is an integrally formed ceramic part.

9. The micro powder grinding mill according to claim 8, characterized in that: The ceramic lining layer, the classifying wheel assembly and the pulverizing mechanism are made of alumina or zirconia ceramic parts.

Images