CN114985059B - Completely limited progressive partition type vertical abrasive bed - Google Patents
Completely limited progressive partition type vertical abrasive bed Download PDFInfo
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- CN114985059B CN114985059B CN202210679810.9A CN202210679810A CN114985059B CN 114985059 B CN114985059 B CN 114985059B CN 202210679810 A CN202210679810 A CN 202210679810A CN 114985059 B CN114985059 B CN 114985059B
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- grinding
- grinding disc
- lining plate
- material blocking
- ring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C15/007—Mills with rollers pressed against a rotary horizontal disc
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Abstract
The invention introduces a totally-limited progressive partition type vertical grinding machine, which comprises a grinding disc, a material blocking ring, a grinding disc lining plate, a lining plate compression ring and a grinding roller; the upper surface of the grinding disc is provided with an annular groove around the center of the grinding disc; the material blocking ring is arranged on the periphery of the edge of the grinding disc at the outer side of the annular groove; the millstone lining plate is of a split type annular structure matched with the annular groove on the millstone; the lining plate pressing ring compresses the lining plate of the grinding disc into the annular groove of the grinding disc through bolts; the grinding roller is driven by a loading device, and material blocking ribs are uniformly arranged on the conical surface of the grinding roller at intervals along the circumference. The structure of the baffle plate, the baffle boss and the baffle convex edge enables the vertical grinding material bed to be a completely limited material bed, and improves the energy-saving effect and grinding efficiency of the vertical grinding machine; the progressive partition structure is adopted in the grinding area of the millstone lining plate, so that the crushing process accords with the energy-saving principle of more crushing and less grinding, and the vertical mill is more energy-saving; the height of the material blocking ring is adjusted to achieve the aim of adjusting the fineness or the yield of the product.
Description
Technical Field
The invention relates to the technical field of vertical roller mills, in particular to a completely limited progressive partition type vertical grinding machine.
Background
The vertical roller mill is called as vertical mill for short, adopts a material bed grinding mechanism, grinds materials through the relative motion of a grinding roller and a grinding disc, integrates the procedures of grinding, drying, sorting and the like, has simple flow and high grinding efficiency, and is widely used for grinding raw materials, cement, slag and the like; the working principle of the vertical mill is as follows: the motor drives the grinding disc to rotate through the speed reducer, materials fall to the center of the grinding disc through feeding materials of the feeding valve, the materials move to the outer edge of the grinding disc under the action of centrifugal force, and a material bed is formed above a lining plate of the grinding disc; the number of the grinding rollers is 2, 3 or more, the grinding rollers are driven by respective loading systems to pressurize a material bed on the grinding disc, the grinding rollers and the grinding disc rotate in opposite directions under the action of friction force, and materials are brought into between the grinding rollers and the grinding disc for grinding; the crushed material overflows to the outer edge of the grinding disc, passes over the material blocking ring, is mixed with high-speed hot air flow from the blowing ring, coarse particles are discharged out of the grinding disc, and the rest particles are subjected to gravity field separation and centrifugal force field separation upwards.
The material bed of the general vertical mill is an incomplete limited material bed without partition, the material bed consists of a grinding roller, a grinding disc lining plate and a material blocking ring at the outer edge of the grinding disc, the working surface at the outer edge of the grinding roller is arc-shaped, and one side of the center of the grinding disc is a material pile; under the extrusion of the grinding roller to the material layer, the material layer moves to one side of the center of the grinding disc; according to the material bed crushing principle, the energy consumed by crushing the materials is not only the crushing energy directly used for the materials, but also the compression energy and the flowing energy of the material bed, so that whether the material bed is stable is very important to the energy utilization rate of the material bed crushing process, and the energy utilization rates are different due to different limits of the materials; in addition, the energy-saving principle of more crushing and less grinding is provided in the crushing principle, namely: for the conventional crushing process, the unit energy consumption of the crushing operation is greatly lower than that of the grinding operation, so that the workload of the crushing operation is increased as much as possible to reduce the crushing energy consumption, and the workload of the grinding operation is reduced; at present, the requirements on energy conservation and consumption reduction are more and more strict, the limit of a vertical grinding material bed is increased, and the energy conservation principle of more grinding and less grinding can be implemented in the process of grinding the opposite grinding, so that the method has important significance on energy conservation of the opposite grinding and improvement on grinding efficiency.
On the other hand, the effect of the particles with different thicknesses on the hydration performance of the cement in the composition of the cement particles is different, and the cement quality is greatly related to the content of the particles with the diameter of 3-30 um in the finished cement product; the current user puts higher demands on how the vertical mill controls the granularity distribution of the finished product; the effect of controlling the particle size distribution of the finished product is limited only from the point of view of improving the performance of the classifying equipment, which places a higher demand on the ability to pulverize the material.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a completely limited progressive partition type vertical grinding machine, which increases grinding efficiency and reduces compression energy and flow energy consumption of the grinding machine.
The technical scheme adopted by the invention is as follows:
a totally limited progressive partition type vertical grinding machine comprises a grinding disc, a material blocking ring, a grinding disc lining plate, a lining plate compression ring and a grinding roller;
the upper surface of the grinding disc surrounds the center of the grinding disc, and screw holes are uniformly formed in the groove bottom, close to one side of the inner annular surface, of the annular groove along the circumference; the material blocking ring is arranged on the periphery of the edge of the grinding disc at the outer side of the annular groove; the grinding disc lining plate is of a split type annular structure matched with an annular groove on the grinding disc, the upper surface of the grinding disc lining plate is provided with a step structure which rises gradually from the center to the edge, the step structure divides the upper surface of the grinding disc lining plate into a grinding area and a grinding area from the inner ring to the outer ring, material blocking bosses are uniformly arranged on the upper surface of the grinding disc lining plate at intervals along the radial direction, a circle of material blocking plates are arranged on the periphery of the inner ring surface of the grinding disc lining plate, an included angle alpha between the outer side surface of each material blocking plate and the upper surface of the grinding disc lining plate is 60-90 degrees, the material blocking plates and the grinding disc lining plate are of an integrated structure, and the inner ring surface of the grinding disc lining plate and the inner side surface of each material blocking plate are arranged on a common inclined plane;
the outer ring surface of the lining plate pressing ring is an inclined surface matched with the inclined surface of the inner ring surface of the grinding disc lining plate, the inner ring surface of the lining plate pressing ring is in fit with the inner ring surface of the annular groove, holes corresponding to the screw holes in the annular groove of the grinding disc are uniformly formed in the circumference of the upper ring surface of the lining plate pressing ring, and the lining plate pressing ring tightly presses the grinding disc lining plate in the annular groove of the grinding disc through bolts;
the grinding roller is driven by the loading device, the grinding roller is of a conical structure, the conical surface width of the grinding roller is matched with the annular width of the grinding disc lining plate, the included angle between the conical surface of the grinding roller and the central axis of the grinding roller is 15 degrees, and material blocking ribs are arranged on the conical surface of the grinding roller along the circumference at uniform intervals.
Specifically, the step structure on the millstone lining plate is set to be 2-3 stages.
Specifically, the material blocking rings are arranged in a structure of 4-5 layers, the lowest layer material blocking ring is matched with the edge of the grinding disc in a stepped structure, bolt holes are uniformly formed in the circumference of the edge of the grinding disc, bolt counter bores corresponding to the bolt holes in the edge of the grinding disc are formed in the uppermost layer material blocking ring, the material blocking rings are fixed on the edge of the grinding disc through connecting bolts after being overlapped, and the widths of the material blocking rings in all layers are gradually reduced from bottom to top; avoiding accumulation of materials.
More specifically, the lower three layers of the material blocking ring are made of Q345B steel, the inner side of the material blocking ring is welded with a composite steel plate, and the rest layers are made of NM400 steel plates.
Specifically, the material blocking boss on the grinding disc lining plate and the material blocking convex rib on the grinding roller conical surface are of integrated structures with square sections, the side length of each square is 8-15mm, and the interval between every two adjacent material blocking bosses or adjacent material blocking convex ribs is 280-310 mm.
By adopting the technical scheme, the invention has the following advantages:
the structure of the baffle plate, the baffle boss and the baffle convex edge enables the vertical grinding material bed to be a completely limited material bed, and improves the energy-saving effect and grinding efficiency of the vertical grinding machine; the grinding area of the millstone lining plate adopts a progressive partition type structure, a grinding area and a crushing area are distinguished, the main functions of the grinding area are fine grinding and coarse grinding, and the functional partition enables the grinding process to accord with the energy-saving principle of more grinding and less grinding, so that the vertical mill is more energy-saving; the vertical mill grinding efficiency is improved, the height of the material blocking ring can be increased or decreased, the flow velocity of the material overflowing the material blocking ring can be adjusted, the purposes of adjusting the fineness or the yield of the product and the like are achieved, and more regulation and control means are provided for controlling parameters such as the granularity distribution of the finished product.
Drawings
Fig. 1 is a schematic overall structure of the present invention.
Fig. 2 is a schematic top view of the abrasive disc of the present invention.
Fig. 3 is a partial schematic view of the abrasive disc of the present invention.
FIG. 4 is a schematic view of the material distribution in operation of the present invention.
In the figure: the grinding machine comprises a 1-grinding disc, a 2-material blocking ring, a 3-grinding disc lining plate, a 31-material blocking plate, a 32-material blocking boss, a 4-lining plate compression ring, a 5-grinding roller, a 51-material blocking convex edge and a 6-loading device.
Detailed Description
The present invention is further explained below with reference to the drawings and examples, which are not to be construed as limiting the scope of the invention, and the purpose of the present invention is to protect all technical improvements within the scope of the invention.
A totally limited progressive partition type vertical abrasive bed is shown in the accompanying figures 1-4, and comprises a grinding disc 1, a material blocking ring 2, a grinding disc lining plate 3, a lining plate pressing ring 4 and a grinding roller 5.
The upper surface of the grinding disc 1 is provided with an annular groove around the center of the grinding disc 1, and screw holes are uniformly formed in the groove bottom of one side, close to the inner annular surface, of the annular groove along the circumference; the material blocking rings 2 are arranged on the circumference of the edge of the grinding disc 1 at the outer side of the annular groove, the material blocking rings 2 are in 5 layers of structure, the lowest layer of material blocking rings 2 are matched with the edge of the grinding disc 1 in a step-type structure, bolt holes are uniformly formed in the circumference of the edge of the grinding disc 1, bolt counter bores corresponding to the bolt holes in the edge of the grinding disc 1 are formed in the uppermost layer of material blocking rings 2, the material blocking rings 2 are fixed on the edge of the grinding disc 1 through connecting bolts after being overlapped, and the width of each layer of material blocking rings 2 is gradually reduced from bottom to top so as to avoid material accumulation; the lower three layers are made of Q345B steel, the inner sides of the lower three layers are welded with composite steel plates, and the upper two layers are made of NM400 steel plates.
The grinding disc lining plate 3 is of a split annular structure matched with an annular groove on the grinding disc 1, a step structure which gradually rises is arranged on the upper surface of the grinding disc lining plate 3 from the center to the edge, the step structure on the grinding disc lining plate 3 is 2-3 stages, the step structure divides the upper surface of the grinding disc lining plate 3 into a grinding area and a grinding area from the inner ring to the outer ring, and material blocking bosses 32 are uniformly arranged on the upper surface of the grinding disc lining plate 3 at intervals along the radial direction; the millstone lining plate 3 is provided with a circle of baffle plate 31 along the circumference of the inner annular surface, the included angle alpha between the outer side surface of the baffle plate 31 and the upper surface of the millstone lining plate 3 is 60-90 degrees, the baffle plate 31 and the millstone lining plate 3 are of an integrated structure, and the inner annular surface of the millstone lining plate 3 and the inner side surface of the baffle plate 31 are arranged in a common inclined plane.
The outer ring surface of the lining plate pressing ring 4 is an inclined surface matched with the inclined surface of the inner ring surface of the grinding disc lining plate 3, the inner ring surface of the lining plate pressing ring 4 is in fit with the inner ring surface of the annular groove, holes corresponding to screw holes in the annular groove of the grinding disc 1 are uniformly formed in the upper ring surface of the lining plate pressing ring 4 along the circumference, and the grinding disc lining plate 3 is pressed and arranged in the annular groove of the grinding disc 1 through bolts by the lining plate pressing ring 4.
The grinding roller 5 is driven by the loading device 6, the grinding roller 5 is of a conical structure, the conical surface width of the grinding roller 5 is matched with the annular width of the grinding disc lining plate 3, the included angle between the conical surface of the grinding roller 5 and the central axis of the grinding roller 5 is 15 degrees, and the conical surface of the grinding roller 5 is provided with blocking ribs 51 at uniform intervals along the circumference.
Preferably, the material blocking boss 32 on the grinding disc lining plate 3 and the material blocking convex rib 51 on the conical surface of the grinding roller 5 are of an integrated structure with square cross sections, the side length of the square is 8-15mm, and the interval between every two adjacent material blocking bosses 32 or between every two adjacent material blocking convex ribs 51 is 280-310 mm.
When the grinding machine works, the grinding roller 5 is driven by the loading device 6 to pressurize a material bed on the grinding disc 1, the motor drives the grinding disc 1 to rotate through the speed reducer, and the grinding roller 5 and the grinding disc 1 rotate in opposite directions under the action of friction force; the materials fall to the center of the millstone 1 through the feeding valve, then move towards the edge of the millstone 1 under the action of centrifugal force, and form a material bed above the millstone liner 3, the materials are brought into between the milling roller 5 and the millstone liner 3 for crushing, coarse particle materials from the center of the millstone 1 firstly enter a crushing and grinding area of the millstone liner 3 for fine crushing and coarse grinding, and then enter a grinding area for fine grinding; the crushing and grinding area has the advantages that the thickness of the material in the crushing and grinding area is small, the main functions are fine crushing and coarse grinding, the grinding area is close to the edge of the grinding disc 1, the received semi-coarse particles which are mainly from the crushing and grinding area and are subjected to preliminary crushing are thin, the pressure in the unit area of the material is large, the main functions are fine grinding, and the functional partition enables the crushing process to conform to the energy-saving principle of multiple crushing and less grinding, so that the vertical grinding is more energy-saving; the material blocking rings 2 are positioned at the outer edge of the grinding disc 1 to limit a material bed on one side of the outer edge of the grinding disc 1, and the material blocking rings 2 are overlapped and detachably adjusted to adjust the overflow speed of materials on the material bed so as to achieve the purpose of controlling the yield; the grinding disc lining plate 3 is close to a circle of integrated material baffle plate 31 on one side of the center of the grinding disc 1, an included angle alpha between the outer side surface of the material baffle plate 31 and the upper surface of the grinding disc lining plate 3 is 60-90 degrees, the height of the material baffle plate is equal to or slightly larger than the height of a material layer in actual operation, and the material layer is prevented from pushing and flowing to one side of the center of the grinding disc 1 when being rolled, so that the material bed on one side close to the center of the grinding disc 1 is limited; meanwhile, the material blocking boss 32 in the radial direction of the millstone lining plate 3 and the material blocking convex rib 51 in the conical surface direction of the millstone roller 5 jointly play a role in holding and biting materials and slowing down the sliding of the materials in the circumferential direction; therefore, the material bed can limit the materials in the left-right, up-down and circumferential directions, and a completely limited material bed is formed; the fully-restricted material bed is more stable, reduces the compression energy and the flow energy consumption of the material bed, reduces the energy consumption except the non-direct crushing, improves the utilization rate of crushing energy, and improves the energy-saving effect and the grinding efficiency.
The invention is not described in detail in the prior art.
The embodiments selected herein for the purposes of disclosing the present invention are presently considered to be suitable, however, it is to be understood that the present invention is intended to include all such variations and modifications as fall within the spirit and scope of the present invention.
Claims (2)
1. The completely limited progressive partition type vertical grinding machine is characterized by comprising a grinding disc, a material blocking ring, a grinding disc lining plate, a lining plate compression ring and a grinding roller;
the upper surface of the grinding disc surrounds the center of the grinding disc, and screw holes are uniformly formed in the groove bottom, close to one side of the inner annular surface, of the annular groove along the circumference; the material blocking ring is arranged on the periphery of the edge of the grinding disc at the outer side of the annular groove; the material blocking rings are arranged in a 4-5-layer structure, the lowest layer material blocking ring is matched with the edge of the grinding disc in a step-type structure, bolt holes are uniformly formed in the circumference of the edge of the grinding disc, bolt counter bores corresponding to the bolt holes in the edge of the grinding disc are formed in the uppermost layer material blocking ring, the material blocking rings are fixed on the edge of the grinding disc through connecting bolts after being overlapped, the width of each layer of material blocking ring is gradually reduced from bottom to top, the lower three layers of material blocking rings are all made of Q345B steel, composite steel plates are welded on the inner side of the material blocking rings in a pasting mode, and NM400 steel plates are adopted as the rest layers; the grinding disc lining plate is of a split type annular structure matched with an annular groove on the grinding disc, the upper surface of the grinding disc lining plate is provided with a step structure which rises gradually from the center to the edge, the step structure is arranged to be 2-3 stages, the upper surface of the grinding disc lining plate is divided into a grinding area and a grinding area from the inner ring to the outer ring by the step structure, the upper surface of the grinding disc lining plate is uniformly provided with material blocking bosses at intervals along the radial direction, the periphery of the inner ring surface of the grinding disc lining plate is provided with a circle of material blocking plates, the included angle alpha between the outer side surface of each material blocking plate and the upper surface of the grinding disc lining plate is 60 degrees, the material blocking plates and the grinding disc lining plate are of an integrated structure, and the inner ring surface of the grinding disc lining plate and the inner side surface of each material blocking plate are arranged in a common inclined plane;
the outer ring surface of the lining plate pressing ring is an inclined surface matched with the inclined surface of the inner ring surface of the grinding disc lining plate, the inner ring surface of the lining plate pressing ring is in fit with the inner ring surface of the annular groove, holes corresponding to the screw holes in the annular groove of the grinding disc are uniformly formed in the circumference of the upper ring surface of the lining plate pressing ring, and the lining plate pressing ring tightly presses the grinding disc lining plate in the annular groove of the grinding disc through bolts;
the grinding roller is driven by the loading device, the grinding roller is of a conical structure, the conical surface width of the grinding roller is matched with the annular width of the grinding disc lining plate, the included angle between the conical surface of the grinding roller and the central axis of the grinding roller is 15 degrees, and material blocking ribs are uniformly arranged on the conical surface of the grinding roller at intervals along the circumference;
the material blocking ring, the millstone lining plate, the material blocking plate and the material blocking boss on the millstone lining plate, the milling roller and the material blocking convex edge on the milling roller jointly form a completely limited material bed which can limit materials in the left-right direction, the up-down direction and the circumferential direction.
2. The fully constrained progressive zoned vertical mill of claim 1, wherein: the material blocking boss on the grinding disc lining plate and the material blocking convex rib on the grinding roller conical surface are of integrated structures with square sections, the side length of each square is 8-15mm, and the interval between every two adjacent material blocking bosses or between every two adjacent material blocking convex ribs is 280-310 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210679810.9A CN114985059B (en) | 2022-06-16 | 2022-06-16 | Completely limited progressive partition type vertical abrasive bed |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210679810.9A CN114985059B (en) | 2022-06-16 | 2022-06-16 | Completely limited progressive partition type vertical abrasive bed |
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| Publication Number | Publication Date |
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| CN114985059A CN114985059A (en) | 2022-09-02 |
| CN114985059B true CN114985059B (en) | 2023-05-12 |
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202212232U (en) * | 2011-08-19 | 2012-05-09 | 山东东华水泥有限公司 | Novel material blocking ring for vertical mill |
| JP2014091109A (en) * | 2012-11-06 | 2014-05-19 | Mitsubishi Heavy Ind Ltd | Roller mill device |
| CN104368419A (en) * | 2014-11-27 | 2015-02-25 | 包钢集团设计研究院（有限公司） | Millstone of vertical mill with function of eliminating scrap iron deposition |
| CN207287600U (en) * | 2017-09-19 | 2018-05-01 | 佛山科学技术学院 | A kind of milling equipment of ceramic raw material |
| CN209124037U (en) * | 2018-08-23 | 2019-07-19 | 南京中材粉体工程科技有限公司 | A kind of homocline current stabilization liner plate |
| CN209093499U (en) * | 2018-09-13 | 2019-07-12 | 中信重工机械股份有限公司 | A kind of mill component of vertical roll grinder |
| CN209061251U (en) * | 2018-09-19 | 2019-07-05 | 天津宏生建材科技有限公司 | A kind of novel vertical mill staged grinding liner plate |
| CN209138748U (en) * | 2018-11-16 | 2019-07-23 | 金隅冀东水泥(唐山)有限责任公司唐山分公司 | Separate type Vertical Mill material baffle structure |
| CN215234673U (en) * | 2020-09-22 | 2021-12-21 | 唐山鼎坤机械制造有限公司 | Wear-resistant structure of grinding disc of vertical mill |
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