CN112827579B - Screening lifting device in mill and vertical roller mill - Google Patents
Screening lifting device in mill and vertical roller mill Download PDFInfo
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- CN112827579B CN112827579B CN202110160525.1A CN202110160525A CN112827579B CN 112827579 B CN112827579 B CN 112827579B CN 202110160525 A CN202110160525 A CN 202110160525A CN 112827579 B CN112827579 B CN 112827579B
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- rotary screen
- screen
- hopper
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- 238000012216 screening Methods 0.000 title claims abstract description 23
- 238000000227 grinding Methods 0.000 claims abstract description 74
- 239000000463 material Substances 0.000 claims abstract description 60
- 238000007599 discharging Methods 0.000 claims abstract description 19
- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 230000001154 acute effect Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 3
- 238000003801 milling Methods 0.000 abstract 1
- 239000000843 powder Substances 0.000 description 10
- 230000009471 action Effects 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000011362 coarse particle Substances 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000009270 solid waste treatment Methods 0.000 description 1
Classifications
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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
-
- 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
-
- 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
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
- B02C23/12—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone
-
- 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
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/16—Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/08—Screens rotating within their own plane
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention provides an in-mill screening and lifting device and a vertical roller mill, wherein the in-mill screening and lifting device is applied to the vertical roller mill, the vertical roller mill comprises a shell, a millstone and a plurality of milling rollers, and the device comprises: the collecting hopper is arranged at the periphery of the grinding disc between two adjacent grinding rollers, and a gap is reserved between the inner side of the collecting hopper and the outer wall of the grinding disc; a rotary screen provided outside the collection hopper, and having a bottom end portion positioned below the collection hopper for lifting the material discharged from the collection hopper to a top end portion of the rotary screen; the discharging chute is arranged above the millstone in a high-outside and low-inside posture, and the top end part of the discharging chute is positioned right below the top end part of the rotary screen; and the rotary screen driving part is arranged on the outer side of the vertical roller mill and is in transmission connection with the rotary screen. The invention has the characteristics of compact structure, convenient installation and use, stable operation and simple maintenance. Has higher economic value and social benefit in the aspects of energy conservation and emission reduction.
Description
Technical Field
The invention relates to the technical field of grinding equipment, in particular to an in-mill screening lifting device and a vertical roller mill.
Background
In the production process of building material industry such as cement, vertical roller mill is used as final grinding equipment in aspects such as raw material, final product, solid waste treatment and the like all the time and has huge market. Along with the increasingly strict requirements of energy and environment, the energy consumption of a vertical mill system is required to be higher while the vertical mill is used.
Although the vertical roller mill has the characteristics of compact structure and cost saving of construction, the finished product conveying and most of materials are circularly dependent on wind power lifting, so that the vertical roller mill has disadvantages in terms of energy consumption compared with a roller press system. The new-type vertical mill of the external circulation system is generated, and the finished product of the vertical mill and the external circulation depend on the lifting of an external lifting machine. However, in the current practical situation, the amount of primary products formed by the material from the inlet to the outlet is not high, regardless of the roller press or the external circulation vertical roller mill, so that a high external circulation amount is generated, and a large-sized circulation elevator with high power is required to deal with the problem. In addition, a large amount of unqualified materials are lifted to a higher height and fed into the powder selecting machine, so that the fan load of powder selecting is increased, and the consumption of mechanical energy is increased.
Disclosure of Invention
The invention aims to provide an in-mill screening lifting device and a vertical roller mill, which solve the problems that a high-power large-scale circulating elevator is required to be configured for a neutral roller mill in the prior art, the load of a blower for selecting powder is increased, and the consumption of mechanical energy is also increased.
In order to solve the technical problems, the invention adopts the following technical scheme: an in-mill screening lifting device is applied to a vertical roller mill, the vertical roller mill comprises a shell, a millstone which is in rotary motion and a plurality of grinding rollers which are arranged on the millstone and used for grinding materials, and the device comprises: the collecting hopper is arranged at the periphery of the grinding disc between two adjacent grinding rollers, and a gap is reserved between the inner side of the collecting hopper and the outer wall of the grinding disc; a rotary screen provided outside the collection hopper, and having a bottom end portion positioned below the collection hopper for lifting the material discharged from the collection hopper to a top end portion of the rotary screen; the discharging chute is arranged above the millstone in a high-outside and low-inside posture, and the top end part of the discharging chute is positioned right below the top end part of the rotary screen; and the rotary screen driving part is arranged on the outer side of the vertical roller mill and is in transmission connection with the rotary screen.
As the preferred scheme, the collecting hopper includes outer circle board, swash plate, hopper export and inner circle board, outer circle board and inner circle board are located the mill periphery, just the inner circle board highly is less than mill border height, outer circle board highly is higher than mill border height, the swash plate sets firmly between outer circle board and the inner circle board, just the swash plate both ends are to the middle part slope downwards with locate the hopper export at swash plate middle part and link to each other.
As the preferred scheme, the rotary screen includes screen frame, excircle sieve plate and interior sieve plate, the screen frame is close to row material chute one side terminal surface and has the opening, can supply row material chute and collecting hopper tip stretch into, a plurality of relief holes have been seted up to screen frame opposite side tip and excircle face, demountable installation has the excircle sieve plate on the relief hole, interior sieve plate is located the inside cavity of screen frame with certain angle equipartition for promote the material.
Preferably, the installation angle of the inner sieve plate forms an acute angle with the tangential direction of the rotating direction of the rotary sieve, and is particularly 50-60 degrees.
As the preferable scheme, rotary screen drive portion is including locating motor, bearing box and the transmission shaft in the casing outside, the motor output links to each other with the transmission shaft tip of cartridge in the bearing box, the transmission shaft other end pass through the flange with rotary screen outer wall fixed connection.
As a preferable scheme, hanging frames are fixedly arranged at two ends of the discharging chute, and the upper parts of the hanging frames are fixedly connected with the shell.
The invention also provides a vertical roller mill, comprising: a housing; the blanking cone is arranged in the shell and used for guiding materials to flow in; the grinding disc is positioned below the discharging cone outlet and is in a rotating state; the grinding rollers are uniformly distributed on the grinding disc and are used for grinding materials on the grinding disc; the mill hopper is arranged at the periphery of the millstone and is used for collecting the sieved materials; and the in-mill screening and lifting device is arranged between two adjacent grinding rollers and is used for screening materials and returning the screened coarse materials to the grinding disc for grinding again.
Preferably, the grinding roller is arranged on a frame for supporting the housing by a rocker arm.
Compared with the prior art, the invention has the beneficial effects that: the coarse grain material grinding device has the advantages that all ground materials are primarily screened through the screening and lifting device in the mill, and the screened coarse grain material is lifted and returned to the center of the millstone, compared with an external circulation mill with a general structure, the coarse grain material grinding device changes a flow path of coarse grain material generated by primary grinding from a mill hopper to a conveying belt to a lifting machine to a powder selecting machine to be directly circulated in the approximate mill, so that mechanical energy consumed by conveying and lifting the coarse grain is greatly saved, the grain quantity of the powder selecting machine is reduced, the required air quantity and air pressure of the powder selecting machine are reduced, and the energy consumption of a fan is saved. The invention has the characteristics of compact structure, convenient installation and use, stable operation and simple maintenance. Has higher economic value and social benefit in the aspects of energy conservation and emission reduction.
Drawings
The disclosure of the present invention is described with reference to the accompanying drawings. It is to be understood that the drawings are designed solely for the purposes of illustration and not as a definition of the limits of the invention. In the drawings, like reference numerals are used to refer to like parts. Wherein:
FIG. 1 is a schematic view of a vertical roller mill according to an embodiment of the present invention;
FIG. 2 is a top view of a vertical roller mill according to an embodiment of the invention;
FIG. 3 is a longitudinal cross-sectional view of a screen lifting device in an embodiment of the invention;
FIG. 4 is a schematic view of the flow of material in a vertical roller mill according to an embodiment of the present invention;
FIG. 5 is a partial cross-sectional view of a screen lifting device in an embodiment of the invention;
FIG. 6 is a schematic structural view of a grinding disc according to an embodiment of the invention;
FIG. 7 is a schematic view of a rotary screen according to an embodiment of the present invention;
fig. 8 is a longitudinal cross-sectional view of a rotary screen according to an embodiment of the invention.
Reference numerals in the drawings: 1 shell, 2 blanking cone, 3 mill, 4 mill roller, 5 motor, 6 bearing box, 7 transmission shaft, 8 rotary screen, 801 screen frame, 802 outer circle screen plate, 803 inner screen plate, 9 discharge chute, 10 gallows, 11 collecting hopper, 1101 outer circle plate, 1102 inclined plate, 1103 hopper outlet, 1104 inner circle plate, 12 mill hopper.
Detailed Description
It is to be understood that, according to the technical solution of the present invention, those skilled in the art may propose various alternative structural modes and implementation modes without changing the true spirit of the present invention. Accordingly, the following detailed description and drawings are merely illustrative of the invention and are not intended to be exhaustive or to limit the invention to the precise form disclosed.
An embodiment according to the invention is shown in connection with fig. 1 to 8. A vertical roller mill comprises a shell 1, a blanking cone 2, a millstone 3, a grinding roller 4, a mill hopper 12 and an in-mill screening lifting device. The blanking cone 2 is arranged in the shell 1 and is used for guiding materials to flow in; the grinding disc 3 is positioned below the outlet of the blanking cone 2 and is in a rotating state; the grinding rollers 4 are uniformly distributed on the grinding disc 3 and used for grinding materials on the grinding disc 3; the mill hopper 12 is arranged on the periphery of the millstone 3 and is used for collecting the sieved materials.
In a specific embodiment, the number of the grinding rollers 4 is 4, which are uniformly distributed on the grinding disc 3, and the grinding rollers 4 are arranged on a rack (not shown) for supporting the shell through rocker arms (not shown). Correspondingly, the number of the screening and lifting devices in the mill is 4, and the screening and lifting devices are arranged between two adjacent mill rollers 4 and are used for screening materials and returning the screened coarse materials to the mill 3 for grinding again.
The grinding disc 3 is of a middle convex and periphery concave structure, and during operation, coarse materials enter the center of the grinding disc 3 from the blanking cone 2, and then are thrown into the bottom of the grinding roller 4 by the rotating grinding disc 3 to be ground, and the ground materials are thrown out of the edge of the grinding disc 3 under the action of centrifugal force.
Referring to fig. 3, the in-mill screening and lifting device comprises a collecting hopper 11, a rotary screen 8, a discharge chute 9 and a rotary screen driving part. The collecting hopper 11 is arranged on the periphery of the grinding disc 3 between two adjacent grinding rollers 4, and a gap is reserved between the inner side of the collecting hopper 11 and the outer wall of the grinding disc 3, so that the rotation of the grinding disc 3 is not influenced. The rotary screen 8 is arranged outside the collecting hopper 11, and the bottom end part of the rotary screen 8 is arranged below the collecting hopper 11 and is used for lifting materials discharged from the collecting hopper 11 to the top end part of the rotary screen 8; the discharging chute 9 is arranged above the millstone 3 in a high-outside and low-inside posture, the top end part of the discharging chute 9 is positioned under the top end part of the rotary screen 8, hanging brackets 10 are fixedly arranged at two ends of the discharging chute 9, and the upper part of the hanging bracket 10 is fixedly connected with the shell 1; the rotary screen driving part is arranged on the outer side of the vertical roller mill and is in transmission connection with the rotary screen 8.
Specifically, referring to fig. 4-6, the collecting hopper 11 includes an outer ring plate 1101, an inclined plate 1102, a hopper outlet 1103 and an inner ring plate 1104, wherein the outer ring plate 1101 and the inner ring plate 1104 are located at the periphery of the grinding disc 3, the height of the inner ring plate 1104 is lower than the height of the edge of the grinding disc 3, and the height of the outer ring plate 1101 is higher than the height of the edge of the grinding disc 3, so that all materials thrown out from the edge of the grinding disc 3 are ensured to fall into the collecting hopper 11. The inclined plate 1102 is fixedly arranged between the outer ring plate 1101 and the inner ring plate 1104, two ends of the inclined plate 1102 are connected with a hopper outlet 1103 arranged in the middle of the inclined plate 1102 in a downward inclined manner, and materials in the collecting hopper 11 slide into the rotary screen 8 from the hopper outlet 1103.
Referring to fig. 7 and 8, the rotary screen 8 includes a screen frame 801, an outer circular screen plate 802 and an inner screen plate 803, wherein the end face of one side of the screen frame 801, which is close to the discharge chute 9, is provided with an opening, the end of the discharge chute 9 and the collection hopper 11 can be extended into the screen frame, the end of the other side of the screen frame 801 and the outer circular surface are provided with a plurality of discharge holes, the outer circular screen plate 802 is detachably installed on the discharge holes, and the outer circular screen plate 802 is a plurality of blocks, which are easy to fix and replace. The inner sieve plates 803 are uniformly distributed in the inner cavity of the sieve frame 801 at a certain angle, so that a plurality of sieving chambers are formed in the sieve frame 801 and are used for lifting and sieving materials. The inner screen plate 803 is mounted at an acute angle, in particular 50-60, preferably 55, to the tangential direction of the direction of rotation of the rotary screen 8.
It will be appreciated that the outer screen panels 802 and the inner screen panels 803 are open to mesh according to the desired material particle size.
The rotary screen driving part comprises a motor 5, a bearing box 6 and a transmission shaft 7 which are arranged on the outer side of the shell 1, the output end of the motor 5 is connected with the end part of the transmission shaft 7 which is inserted into the bearing box 6, and the other end of the transmission shaft 7 is fixedly connected with the outer wall of the rotary screen 8 through a flange. In the embodiment of the invention, the motor 5 is a speed reducing motor, the bearing box 6 is of a conventional structure, two sides of the bearing box are sealed, and the bearing box is internally provided with bearings and is used for bearing the load caused by the operation of the transmission shaft 7 and the rotary screen 8. Under the drive of a speed reducing motor, the transmission shaft 7 rotates at a constant speed to drive the rotary screen 8 to rotate.
In summary, the invention discloses an in-mill screening and lifting device and a vertical roller mill, when the mill runs, materials enter the center of a grinding disc 3 from a blanking cone 2 of the mill, then are thrown into the bottom of a grinding roller 4 by the rotating grinding disc 3, the ground materials are thrown out of the outer edge of the grinding disc 3 under the action of centrifugal force, and the ground materials are concentrated to a hopper outlet 1103 and discharged under the action of an outer ring plate 1101 of a collecting hopper 11 and an inclined plate 1102 thereof, as shown in fig. 4. Since the hopper outlet 1103 of the collection hopper 11 is located at a position just below the center of the rotary screen 8, the material discharged from the collection hopper 11 falls entirely into the rotary screen 8. Because the rotation speed of the grinding disc 3 is constant, the surface material of the grinding disc basically flows smoothly, and the material is distributed on the whole upper surface of the grinding disc 3, the materials thrown into each area of the collecting hopper 11 in the same time period are basically equal, namely the materials entering each rotary screen 8 are basically consistent. After the material enters the rotary screen 8, the material is lifted upwards along the circumferential direction under the action of the inner screen 803, meanwhile, due to the change of the material flowing direction, the material is scattered in the rotary screen 8 through rolling, rebound and the like, and the material of qualified particles falls down through the outer ring screen and the screen holes of the inner screen 803, enters the mill hopper 12 and enters the powder selecting process after being discharged. The large-particle material remains in the screening chamber of the rotary screen 8 and continues to be lifted upwards in the circumferential direction, since the inner screen plate 803 is mounted at a specific angle, after the material has been lifted to a certain height, it begins to slide downwards along the surface of the inner screen plate 803 under the action of weight, and the drop point of the sliding drop is located in the receiving range of the discharge chute 9. The top end of the discharging chute 9 extends into the rotary screen 8 to receive large-particle materials sliding down from the inner screen plate 803, and then the materials are discharged back to the center of the grinding disc 3 along the discharging chute 9 under the action of dead weight to participate in grinding again.
For the external circulation vertical roller mill, the device can primarily screen all ground materials in the mill and lift and return the screened coarse materials to the center of the millstone 3. Compared with an external circulation mill with a general structure, the device changes the circulation path of coarse particle materials generated by primary grinding from a mill hopper to a conveying belt to a lifter to a powder selecting machine to a blanking internal cone to be approximately in direct circulation, so that the mechanical energy consumed by conveying and lifting the coarse particles is greatly saved, the particle quantity entering the powder selecting machine is reduced, the required air quantity and air pressure of the powder selecting machine are reduced, and the energy consumption of a fan is saved.
It should be understood that the in-mill screening and lifting device disclosed by the invention is very suitable for energy-saving modification of the external circulation mill instead of the vertical mill with wind lifting which is widely available in the market at present. The main grinding components and the supporting structure of the existing mill do not need to be modified, and the installed power and specification of new lifting equipment, fans and the like can be greatly reduced, so that primary investment and capital investment are saved. The invention has the characteristics of compact structure, convenient installation and use, stable operation and simple maintenance. Has higher economic value and social benefit in the aspects of energy conservation and emission reduction.
The technical scope of the present invention is not limited to the above description, and those skilled in the art may make various changes and modifications to the above-described embodiments without departing from the technical spirit of the present invention, and these changes and modifications should be included in the scope of the present invention.
Claims (7)
1. The utility model provides a sieve hoisting device in grinding, is applied to on the vertical roller mill, vertical roller mill includes the casing, is rotary motion's mill and locates a plurality of grinding rollers that are used for smashing the material on the mill, its characterized in that, the device includes:
the collecting hopper is arranged at the periphery of the grinding disc between two adjacent grinding rollers, and a gap is reserved between the inner side of the collecting hopper and the outer wall of the grinding disc;
a rotary screen provided outside the collection hopper, and having a bottom end portion positioned below the collection hopper for lifting the material discharged from the collection hopper to a top end portion of the rotary screen;
the discharging chute is arranged above the millstone in a high-outside and low-inside posture, and the top end part of the discharging chute is positioned right below the top end part of the rotary screen;
the rotary screen driving part is arranged at the outer side of the vertical roller mill and is in transmission connection with the rotary screen;
the rotary screen comprises a screen frame, an outer circular screen plate and an inner screen plate, wherein the end face of one side of the screen frame, which is close to the discharging chute, is provided with an opening, the end part of the discharging chute and the end part of the collecting hopper extend in, a plurality of discharging holes are formed in the end part of the other side of the screen frame and the outer circular surface, the outer circular screen plate is detachably arranged on the discharging holes, and the inner screen plate is uniformly distributed in the inner cavity of the screen frame at a certain angle and is used for lifting materials.
2. The in-mill screening lifting device according to claim 1, wherein the collecting hopper comprises an outer ring plate, a sloping plate, a hopper outlet and an inner ring plate, the outer ring plate and the inner ring plate are positioned on the periphery of the grinding disc, the height of the inner ring plate is lower than the height of the edge of the grinding disc, the height of the outer ring plate is higher than the height of the edge of the grinding disc, the sloping plate is fixedly arranged between the outer ring plate and the inner ring plate, and two ends of the sloping plate are connected with the hopper outlet arranged in the middle of the sloping plate in a downward direction towards the middle.
3. An in-mill screening lifting device according to claim 1, characterized in that the mounting angle of the inner screening deck is at an acute angle, in particular 50 ° -60 °, to the tangential direction of the rotation direction of the rotary screen.
4. The in-mill screening lifting device according to claim 1, wherein the rotary screen driving part comprises a motor, a bearing box and a transmission shaft which are arranged on the outer side of the shell, the output end of the motor is connected with the end part of the transmission shaft which is inserted into the bearing box, and the other end of the transmission shaft is fixedly connected with the outer wall of the rotary screen through a flange.
5. The in-mill screening lifting device according to claim 1, wherein hanging frames are fixedly arranged at two ends of the discharging chute, and the upper parts of the hanging frames are fixedly connected with the shell.
6. A vertical roller mill, comprising:
a housing;
the blanking cone is arranged in the shell and used for guiding materials to flow in;
the grinding disc is positioned below the discharging cone outlet and is in a rotating state;
the grinding rollers are uniformly distributed on the grinding disc and are used for grinding materials on the grinding disc;
the mill hopper is arranged at the periphery of the millstone and is used for collecting the sieved materials;
and an in-mill sifting and lifting device according to any one of claims 1 to 5, which is arranged between two adjacent grinding rolls for sifting the material and returning the sifted coarse material to the grinding disc for re-grinding.
7. The vertical roller mill of claim 6 wherein the grinding rollers are provided on a frame for supporting the housing by rocker arms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110160525.1A CN112827579B (en) | 2021-02-05 | 2021-02-05 | Screening lifting device in mill and vertical roller mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110160525.1A CN112827579B (en) | 2021-02-05 | 2021-02-05 | Screening lifting device in mill and vertical roller mill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112827579A CN112827579A (en) | 2021-05-25 |
| CN112827579B true CN112827579B (en) | 2023-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110160525.1A Active CN112827579B (en) | 2021-02-05 | 2021-02-05 | Screening lifting device in mill and vertical roller mill |
Country Status (1)
| Country | Link |
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| CN (1) | CN112827579B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2345278Y (en) * | 1998-11-12 | 1999-10-27 | 王树波 | Micro-disintegrator |
| WO2014067688A1 (en) * | 2013-08-19 | 2014-05-08 | Loesche Gmbh | Vertical roller mill |
| CN108405060A (en) * | 2018-03-27 | 2018-08-17 | 中山虹丽美新材料科技有限公司 | Novel flour mill |
| CN209501830U (en) * | 2019-01-03 | 2019-10-18 | 江苏鹏飞集团股份有限公司 | The coarse grained Vertical Mill of automatic screening in grinding |
| CN210159691U (en) * | 2019-05-23 | 2020-03-20 | 天津水泥工业设计研究院有限公司 | External circulation vertical mill with self-screening function |
| CN210207189U (en) * | 2019-05-07 | 2020-03-31 | 新乡市豫辉黄河建材有限公司 | Powder filtering screen and vertical mill powder selecting device |
| CN215197293U (en) * | 2021-02-05 | 2021-12-17 | 南京西普水泥工程集团有限公司 | Mill inner screening and lifting device and vertical roller mill |
-
2021
- 2021-02-05 CN CN202110160525.1A patent/CN112827579B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2345278Y (en) * | 1998-11-12 | 1999-10-27 | 王树波 | Micro-disintegrator |
| WO2014067688A1 (en) * | 2013-08-19 | 2014-05-08 | Loesche Gmbh | Vertical roller mill |
| CN108405060A (en) * | 2018-03-27 | 2018-08-17 | 中山虹丽美新材料科技有限公司 | Novel flour mill |
| CN209501830U (en) * | 2019-01-03 | 2019-10-18 | 江苏鹏飞集团股份有限公司 | The coarse grained Vertical Mill of automatic screening in grinding |
| CN210207189U (en) * | 2019-05-07 | 2020-03-31 | 新乡市豫辉黄河建材有限公司 | Powder filtering screen and vertical mill powder selecting device |
| CN210159691U (en) * | 2019-05-23 | 2020-03-20 | 天津水泥工业设计研究院有限公司 | External circulation vertical mill with self-screening function |
| CN215197293U (en) * | 2021-02-05 | 2021-12-17 | 南京西普水泥工程集团有限公司 | Mill inner screening and lifting device and vertical roller mill |
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| Publication number | Publication date |
|---|---|
| CN112827579A (en) | 2021-05-25 |
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Effective date of registration: 20231115 Address after: Building 3, No. 5 Hongguang Road, Lishui Economic Development Zone, Nanjing City, Jiangsu Province, 210000 Applicant after: Nanjing Xipu International Engineering Co.,Ltd. Address before: 210000 building 3, No.5, Hongguang East Road, economic development zone, Lishui District, Nanjing City, Jiangsu Province Applicant before: NANJING C-HOPE CEMENT ENGINEERING GROUP Co.,Ltd. |
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