CN110624652B - Vertical mill and millstone thereof - Google Patents
Vertical mill and millstone thereof Download PDFInfo
- Publication number
- CN110624652B CN110624652B CN201911031269.5A CN201911031269A CN110624652B CN 110624652 B CN110624652 B CN 110624652B CN 201911031269 A CN201911031269 A CN 201911031269A CN 110624652 B CN110624652 B CN 110624652B
- Authority
- CN
- China
- Prior art keywords
- inner ring
- outer ring
- module
- ring
- grinding disc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000003245 coal Substances 0.000 abstract description 8
- 238000005299 abrasion Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 239000002817 coal dust Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000011236 particulate material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- B02C15/003—Shape or construction of discs or rings
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention discloses a grinding disc which is used for a vertical mill and comprises an outer ring, an inner ring and a supporting guard plate, wherein the outer ring is connected with the vertical mill through a fixing bolt, the inner ring is positioned on the inner side of the outer ring and used for grinding materials, the supporting guard plate is arranged at the upper end of the inner ring and is higher than the upper end face of the outer ring, one side of the supporting guard plate is connected with the upper end face of the outer ring, which is positioned on the outer side of the fixing bolt, of the outer ring, and the other side of the supporting guard plate is connected with the upper end of the inner ring. The two sides of the support guard plate are respectively connected with the inner ring and the outer ring, the inner ring can be subjected to radial force when the pulverized coal is ground, so that the inner ring is worn, the capacity of the inner ring for bearing the radial force is reduced, and the force is reduced. The support guard plate can apply radial force towards the circle center to the inner ring, so that the attaching force between the inner ring and the grinding roller is increased, and the worn inner ring force is increased. The invention also provides a vertical mill comprising the millstone, and the vertical mill has the advantages.
Description
Technical Field
The invention relates to the technical field of crushing equipment, in particular to a grinding disc. The invention also relates to a vertical mill comprising the millstone.
Background
The fluidized bed boiler has the advantages of high fuel utilization rate, less pollutant, etc. and may be used widely in power generation, metallurgy, cement, etc. The fluidized bed boiler needs to be added with pulverized coal for combustion, coal blocks are ground into pulverized coal by a vertical mill in enterprises, the working principle of the vertical mill is approximately as follows, a motor drives a grinding disc to rotate through a speed reducer, materials fall to the center of the grinding disc from a feed opening, move towards the edge of the grinding disc under the action of centrifugal force and are rolled by a grinding roller, and the crushed materials overflow from the edge of the grinding disc and are simultaneously brought into a high-efficiency powder selecting machine integrated with the vertical mill by high-speed upward hot air flow from a nozzle ring. Coarse powder is returned to the millstone after being separated by the separator, and is ground again; the fine powder flows out of the mill along with the gas for combustion in the boiler. Coarse particulate material and accidentally entering metal parts not carried by the hot gas stream sink from the nozzle ring and are discharged as non-reshargable material in the form of pebble coal.
Abrasion occurs on the grinding disc after the vertical grinding machine is used, so that the grinding efficiency is reduced. When the abrasion reaches about 80% of the output, the vertical mill needs to enter for maintenance. Therefore, the long-term operation of the vertical mill is between 90% and 80% of the effective output range, and the full utilization of equipment cannot be ensured.
Therefore, how to ensure that the output force is reduced less when the grinding disc is worn is a technical problem which needs to be solved by the person skilled in the art.
Disclosure of Invention
The invention aims to provide a grinding disc which is provided with a supporting guard plate and can support the upper end of an inner ring and improve the output force when the inner ring is worn. Another object of the invention is to provide a vertical mill comprising a grinding disc as described above.
In order to achieve the above purpose, the invention provides a grinding disc for a vertical mill, which comprises an outer ring connected with the vertical mill through a fixing bolt, an inner ring connected with the inner side of the outer ring and used for grinding materials, an outer ring connected with the vertical mill through the fixing bolt, an inner ring positioned on the inner side of the outer ring and used for grinding materials, and a support guard plate, wherein the upper end of the inner ring is higher than the upper end face of the outer ring, one side of the support guard plate is connected with the upper end face of the outer ring positioned on the outer side of the fixing bolt, and the other side of the support guard plate is connected with the upper end of the inner ring.
Preferably, the cross section of the support guard plate is arc-shaped and is curved in a direction away from the fixing bolt.
Preferably, a pressurizing part is arranged on the outer side of the outer ring.
Preferably, the cross section of the pressurizing part is a regular triangle with the side length equal to the height of the outer ring, the pressurizing part is connected with the outer side surface of the outer ring, and the upper end and the lower end are flush.
Preferably, the inner side surface of the inner ring is an abrasive surface, and the width of the cross section of the inner ring gradually increases along the direction from top to bottom.
Preferably, the outer ring, the inner ring and the supercharging part respectively comprise outer ring modules, inner ring modules and supercharging part modules with the same number, and one outer ring module, one inner ring module and one supercharging part module are connected to form one millstone module.
Preferably, the inner ring module and the outer ring module in the same millstone module are integrally formed structural members, and the supercharging part module is welded and fixed with the outer ring module.
Preferably, the inner ring module, the outer ring module and the supercharging part module in the same millstone module are integrally formed structural members.
The invention also provides a vertical mill, which comprises any one of the millstone.
The grinding disc provided by the invention is used for a vertical mill and comprises an outer ring which is used for being connected with the vertical mill through a fixing bolt, an inner ring which is positioned on the inner side of the outer ring and used for grinding materials, and a support guard plate, wherein the upper end of the inner ring is higher than the upper end face of the outer ring, one side of the support guard plate is connected with the upper end face of the outer ring positioned on the outer side of the fixing bolt, and the other side of the support guard plate is connected with the upper end of the inner ring.
The two sides of the support guard plate are respectively connected with the inner ring and the outer ring, the inner ring can be subjected to radial force when the pulverized coal is ground, so that the inner ring is worn, the capacity of the inner ring for bearing the radial force is reduced, and the force is reduced. The support guard plate can apply radial force towards the circle center to the inner ring, so that the attaching force between the inner ring and the grinding roller is increased, and the worn inner ring force is increased.
The invention also provides a vertical mill comprising the millstone, and the vertical mill has the advantages.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural view of a grinding disc provided by the invention;
FIG. 2 is a schematic view of the abrasive disc module of FIG. 1;
fig. 3 is a cross-sectional view of the abrasive disc module of fig. 1.
Wherein reference numerals in fig. 1 to 3 are:
an inner ring module 1, an outer ring module 2, a pressurizing part module 3, a support guard plate 4 and a fixing bolt 5.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The present invention will be further described in detail below with reference to the drawings and detailed description for the purpose of enabling those skilled in the art to better understand the aspects of the present invention.
Referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of a grinding disc according to the present invention; FIG. 2 is a schematic view of the abrasive disc module of FIG. 1; fig. 3 is a cross-sectional view of the abrasive disc module of fig. 1.
The millstone provided by the invention is used in a vertical mill. As shown in fig. 1 and 2, the grinding disc comprises an inner ring and an outer ring, the inner side surface of the inner ring is a grinding surface, grinding rollers in the vertical mill are attached to the inner ring, and coal blocks between the grinding disc and the grinding rollers are ground into coal dust in the rotating process of the grinding disc. The outer ring is provided with a bolt hole penetrating along the height direction and is fixedly connected with the vertical mill through a fixing bolt 5. In order to avoid the influence of the fixing bolt 5 on the grinding operation, the bolt hole is a countersunk hole. The inner ring and the outer ring can be connected through welding, integral forming and the like. The grinding surface of the inner ring is usually an inclined surface, the stress of the grinding surface can be decomposed into axial force and radial force in the process of grinding the coal block, the radial force can deform the inner ring because the upper end of the inner ring is higher than the upper end surface of the outer ring, the abrasion of the upper end of the inner ring is aggravated, and after the upper end of the inner ring is abraded, the gap between the grinding surface and the grinding roller is increased, the pressure is reduced, so that the output of the vertical mill is reduced. Still include among the mill and support backplate 4, as shown in fig. 3, the up end of the upper portion of inner circle and outer lane forms right angle structure, and fixing bolt 5 is located this right angle structure, and the upper portion of inner circle lateral surface and the up end that the outer lane is located the fixing bolt 5 outside all are equipped with the mounting groove, and the both sides of support backplate 4 are fixed in the mounting groove. When the upper end of the inner ring is acted by the radial force of the grinding roller, the support guard plate 4 can generate the support force for supporting the inner ring, and the support force faces the axial direction of the inner ring and is opposite to the radial force direction of the grinding roller, so that the force of the inner ring is increased.
Alternatively, in order to ensure that the support guard 4 always has sufficient supporting force, the cross section of the support guard 4 may be in a curved structure, as shown in fig. 3, and the cross section of the support guard 4 is in an arc shape and curved in a direction away from the fixing bolts 5. Because the cross section of the support guard plate 4 is of a bending structure, the support guard plate can generate certain elastic deformation when bearing radial force, and the elastic force of the support guard plate 4 can increase the pressure between the inner ring and the grinding roller, so that the output force of the vertical mill is further improved.
In this embodiment, the grinding disc is provided with a support guard plate 4 located between the inner ring and the outer ring, and the support guard plate 4 can apply a radially inward acting force to the inner ring, so as to balance a radial component force applied by the grinding roller, and when the inner ring is worn more, the guard plate can support the inner ring to approach the grinding roller, so that the output of the vertical grinding machine is increased. In addition, the fixing bolts 5 are positioned below the supporting guard plate 4, and the supporting guard plate 4 can reduce the abrasion of coal dust to the fixing bolts 5, so that the service life of the grinding disc is further prolonged.
The grinding roller applies radial force to the inner ring to enable the whole grinding disc to generate radial deformation, namely the grinding disc can be turned outwards, so that the lower end face of the outer ring is worn, and a pressurizing part is arranged on the outer side of the outer ring. When the grinding disc deforms radially, the pressurizing part is contacted with the vertical mill firstly, so that the deformation of the grinding disc can be reduced, the inner ring is supported, and the output of the vertical mill is increased; on the other hand, the abrasion of the outer ring can be reduced.
Optionally, the cross section of pressure boost portion is the regular triangle of limit length equal to the outer lane height, and pressure boost portion links to each other with the lateral surface of outer lane, and upper and lower both ends parallel and level. When the grinding disc deforms radially, the whole lower end face of the pressurizing part is contacted with the vertical mill, and when abrasion occurs on the whole plane, the abrasion speed is obviously slower than that of the situation occurring on the side edge, so that the abrasion speed of the grinding disc is slowed down. Of course, the user may employ a trapezoid, rectangular or other shaped pressurizing portion as desired, which is not limited herein.
Optionally, as shown in fig. 3, the width of the cross section of the inner ring gradually increases along the direction from top to bottom, and the width increasing amplitude also gradually increases, so that the grinding surface forms an arc surface, and when the upper part of the grinding surface is worn, the lower part can still be attached to the grinding roller, and the grinding effect is ensured.
In this embodiment, the outer side of the inner ring is further provided with a pressurizing part, and when the grinding disc deforms radially, the pressurizing part can limit the deformation amount of the grinding disc, support the inner ring, and increase the adhesion force between the inner ring and the grinding roller, so that the output of the vertical grinding machine is further increased.
In addition, the abrasion parts are often unevenly distributed when the grinding disc is abraded, and if one side of the grinding disc is abraded seriously, serious waste is caused by integrally replacing the grinding disc. Thus, in the present application, the outer ring, the inner ring, and the supercharging portion are constituted by the outer ring module 2, the inner ring module 1, and the supercharging portion module 3, respectively, and the number of the outer ring module 2, the inner ring module 1, and the supercharging portion module 3 are equal. An outer ring module 2, an inner ring module 1 and a pressurizing part module 3 are connected to form a grinding disc module, and the central angles corresponding to each grinding disc module are equal. When one side of the millstone is worn seriously, the millstone module at the side is replaced. The corresponding support guard 4 can also be divided into a plurality of blocks and mounted on the respective grinding disc modules, each outer ring module 2 being provided with at least one bolt hole for connection to a vertical mill. In fig. 1, the grinding disc comprises 12 grinding disc modules, and a user can set the number of the grinding disc modules according to needs, so that the grinding disc is not limited.
In a specific embodiment of the application, an inner ring module 1 and an outer ring module 2 in the same grinding disc module are integrally formed structural members, and a supercharging part module 3 and the outer ring module 2 are fixed through welding. The production cost of welded fixation is low, and the welded fixation is convenient for popularization in enterprises.
In another embodiment of the present application, the inner ring module 1, the outer ring module 2 and the supercharging part module 3 in the same millstone module are integrally formed structural members. The integrally formed millstone module has better material performance, so that the millstone module is more wear-resistant, and the service life of the millstone is further prolonged.
In this embodiment, the mill comprises a plurality of mill modules, when the mill one side takes place wearing and tearing, can change the mill module of this side, and another part mill module continues to use to reduce the cost of enterprise.
The invention also provides a vertical mill, which comprises any millstone; the structure of other parts of the vertical mill can refer to the prior art, and will not be described herein.
It should be noted that in this specification relational terms such as first and second are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.
The vertical mill and the millstone provided by the invention are described in detail above. The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
Claims (5)
1. The grinding disc is used for a vertical mill and is characterized by comprising an outer ring connected with the vertical mill through a fixing bolt (5) and an inner ring connected with the inner side of the outer ring and used for grinding materials, and further comprising a support guard plate (4), wherein the upper end of the inner ring is higher than the upper end face of the outer ring, one side of the support guard plate (4) is connected with the upper end face of the outer ring, which is positioned at the outer side of the fixing bolt (5), and the other side of the support guard plate is connected with the upper end of the inner ring;
the upper part of the inner ring and the upper end surface of the outer ring form a right angle;
The cross section of the support guard plate (4) is arc-shaped and is bent in a direction away from the fixing bolts (5), and the support guard plate (4) can apply inward radial acting force to the inner ring;
The outer side of the outer ring is provided with a pressurizing part;
the cross section of the pressurizing part is a regular triangle with the side length equal to the height of the outer ring, the pressurizing part is connected with the outer side surface of the outer ring, and the upper end and the lower end of the pressurizing part are flush;
the inner side surface of the inner ring is a grinding surface, and the width of the cross section of the inner ring gradually increases along the direction from top to bottom.
2. The grinding disc according to claim 1, characterized in that the outer ring, the inner ring and the supercharging part respectively comprise an equal number of outer ring modules (2), inner ring modules (1) and supercharging part modules (3), one outer ring module (2), one inner ring module (1) and one supercharging part module (3) being connected to form one grinding disc module.
3. The grinding disc according to claim 2, characterized in that the inner ring module (1) and the outer ring module (2) in the same grinding disc module are integrally formed structural members, and the supercharging part module (3) is welded and fixed with the outer ring module (2).
4. The grinding disc according to claim 2, characterized in that the inner ring module (1), the outer ring module (2) and the plenum module (3) in the same grinding disc module are integrally formed structures.
5. A vertical mill comprising a grinding disc according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911031269.5A CN110624652B (en) | 2019-10-28 | 2019-10-28 | Vertical mill and millstone thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911031269.5A CN110624652B (en) | 2019-10-28 | 2019-10-28 | Vertical mill and millstone thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110624652A CN110624652A (en) | 2019-12-31 |
| CN110624652B true CN110624652B (en) | 2024-05-31 |
Family
ID=68977897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911031269.5A Active CN110624652B (en) | 2019-10-28 | 2019-10-28 | Vertical mill and millstone thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110624652B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU4458889A (en) * | 1988-11-18 | 1990-05-24 | Ube Industries, Ltd. | Vertical mill |
| CN202427496U (en) * | 2012-01-05 | 2012-09-12 | 青州中联水泥有限公司 | Vertical mill material blocking ring |
| CN103934065A (en) * | 2014-05-16 | 2014-07-23 | 江苏新业重工股份有限公司 | Novel retention ring of vertical mill |
| CN204170777U (en) * | 2014-10-17 | 2015-02-25 | 福建三安钢铁有限公司 | A kind of damping roller type vertical mill machine |
| CN205216974U (en) * | 2015-12-09 | 2016-05-11 | 潍坊业兴新型建材有限公司 | Slay miropowder keeps off material circle with standing to grind |
| CN207872298U (en) * | 2017-12-27 | 2018-09-18 | 唐山博全实业有限公司 | A kind of Vertical Mill stablizes the device of the bed of material |
| CN211134138U (en) * | 2019-10-28 | 2020-07-31 | 湖北华电江陵发电有限公司 | Vertical mill and grinding disc thereof |
-
2019
- 2019-10-28 CN CN201911031269.5A patent/CN110624652B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU4458889A (en) * | 1988-11-18 | 1990-05-24 | Ube Industries, Ltd. | Vertical mill |
| CN202427496U (en) * | 2012-01-05 | 2012-09-12 | 青州中联水泥有限公司 | Vertical mill material blocking ring |
| CN103934065A (en) * | 2014-05-16 | 2014-07-23 | 江苏新业重工股份有限公司 | Novel retention ring of vertical mill |
| CN204170777U (en) * | 2014-10-17 | 2015-02-25 | 福建三安钢铁有限公司 | A kind of damping roller type vertical mill machine |
| CN205216974U (en) * | 2015-12-09 | 2016-05-11 | 潍坊业兴新型建材有限公司 | Slay miropowder keeps off material circle with standing to grind |
| CN207872298U (en) * | 2017-12-27 | 2018-09-18 | 唐山博全实业有限公司 | A kind of Vertical Mill stablizes the device of the bed of material |
| CN211134138U (en) * | 2019-10-28 | 2020-07-31 | 湖北华电江陵发电有限公司 | Vertical mill and grinding disc thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110624652A (en) | 2019-12-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109277146B (en) | Sand making machine with vertical mill | |
| CN110732383A (en) | Process system for producing fine sand by machine-made sand vertical mill | |
| CN110732382A (en) | machine-made sand vertical mill and production process system thereof | |
| CN201220218Y (en) | Powder concentrator with V-shaped groove fixed guide blade | |
| CN202212232U (en) | Novel material blocking ring for vertical mill | |
| CN211134138U (en) | Vertical mill and grinding disc thereof | |
| CN110624652B (en) | Vertical mill and millstone thereof | |
| CN209828921U (en) | Optimized biomass flat-die granulation machine | |
| CN209076811U (en) | A kind of variable-pitch auger blender of vertical mixing mill | |
| CN217120424U (en) | External adjusting device of vertical roller mill suspension material blocking ring | |
| CN217016837U (en) | Superfine grinder of non-metallic mineral | |
| CN217120425U (en) | Vertical roller mill suspension material blocking ring built-in adjusting device | |
| CN213644282U (en) | High-efficient shock attenuation roll squeezer | |
| CN201275489Y (en) | Hammer crusher | |
| CN211436554U (en) | Reduce ventilation resistance's rotatory nozzle cascade of medium speed coal mill | |
| CN201731764U (en) | Sintering machine tail guide trough | |
| CN213201582U (en) | Circulating fly ash segmentation transmission device | |
| CN217568944U (en) | Wear-resisting element, wear-resisting roller shaft and roller press with wear-resisting roller shaft | |
| CN211034430U (en) | Single-shaft eccentric feeder | |
| CN220697054U (en) | Cement vertical mill scraping device | |
| CN212916003U (en) | Rotor for vertical shaft impact crusher | |
| CN114643103B (en) | Vertical roller mill striker ring adjusting device | |
| CN218107861U (en) | Reduce mill of coal pulverizer vibration | |
| CN215464964U (en) | Wear-proof device for reamer of coal mill | |
| CN215277614U (en) | Maintenance-free roller press |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |