CN112827579A - Mill inner screening and lifting device and vertical roller mill - Google Patents
Mill inner screening and lifting device and vertical roller mill Download PDFInfo
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- CN112827579A CN112827579A CN202110160525.1A CN202110160525A CN112827579A CN 112827579 A CN112827579 A CN 112827579A CN 202110160525 A CN202110160525 A CN 202110160525A CN 112827579 A CN112827579 A CN 112827579A
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- 238000012216 screening Methods 0.000 title claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 67
- 238000007599 discharging Methods 0.000 claims abstract description 20
- 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 6
- 230000008901 benefit Effects 0.000 abstract description 3
- 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
- 239000000843 powder Substances 0.000 description 10
- 230000009471 action Effects 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000011362 coarse particle Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000009270 solid waste treatment Methods 0.000 description 1
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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
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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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- 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
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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
- 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
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- 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
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- 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
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- 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 grinding disc and a plurality of grinding rollers, and the device comprises: the material collecting hopper is arranged on the periphery of the grinding disc between every two adjacent grinding rollers, and a gap is formed between the inner side of the material collecting hopper and the outer wall of the grinding disc; the rotary screen is arranged outside the collecting hopper, and the bottom end part of the rotary screen is positioned below the collecting hopper and used for lifting the materials discharged from the collecting hopper to the top end part of the rotary screen; the discharging chute is arranged above the grinding disc 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 and lifting device and a vertical roller mill.
Background
At present, in the production process of building material industry such as cement, the vertical roller mill always occupies a huge market as final grinding equipment in the aspects of raw combustion materials, final products, solid waste treatment and the like. With the stricter requirements on energy and environment, the vertical mill is used, and simultaneously, higher requirements are provided for the energy consumption of a vertical mill system.
Although the vertical roller mill has the characteristics of compact structure and capital cost saving, the finished product conveying and most of material circulation depend on wind power lifting, so the vertical roller mill is in a weak point in energy consumption compared with a roller press system. Therefore, a novel vertical mill of an external circulation system is promoted, and finished products of the vertical mill and the external circulation are lifted by an external hoister. However, in the current practical situation, no matter the roller press or the external circulation vertical roller mill, the amount of the primary finished product formed from the material entering to the material discharging is not high, so that a high external circulation amount is generated, and a large circulation elevator with high power is required to be configured to deal with the problem. In addition, a large amount of unqualified materials are lifted to a higher height and fed into the powder concentrator, so that the fan load of powder concentration is increased, and the consumption of mechanical energy is also increased.
Disclosure of Invention
The invention aims to provide an in-mill screening and lifting device and a vertical roller mill, and solves the problems that in the prior art, a large-scale high-power circulation lifting machine needs to be arranged on the vertical roller mill, the fan load of powder selection is increased, and the mechanical energy consumption is increased.
In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides a sieve and promote device in mill, is applied to on the vertical roller mill, the vertical roller mill includes the casing, is rotary motion's mill and locates be used for smashing a plurality of grinding rollers of material on the mill, the device includes: the material collecting hopper is arranged on the periphery of the grinding disc between every two adjacent grinding rollers, and a gap is formed between the inner side of the material collecting hopper and the outer wall of the grinding disc; the rotary screen is arranged outside the collecting hopper, and the bottom end part of the rotary screen is positioned below the collecting hopper and used for lifting the materials discharged from the collecting hopper to the top end part of the rotary screen; the discharging chute is arranged above the grinding disc 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.
According to a preferable scheme, the aggregate bin comprises an outer ring plate, an inclined plate, a bin outlet and an inner ring plate, the outer ring plate and the inner ring plate are located on the periphery of the grinding disc, the height of the inner ring plate is lower than that of the edge of the grinding disc, the height of the outer ring plate is higher than that of the edge of the grinding disc, the inclined plate is fixedly arranged between the outer ring plate and the inner ring plate, and two ends of the inclined plate are inclined downwards towards the middle part and connected with the bin outlet in the middle of the inclined plate.
As preferred scheme, the rotary screen includes bank of screens, excircle sieve and interior sieve, the bank of screens is close to row material chute a side end face and has the opening, can supply row material chute and collection hopper tip stretch into, a plurality of relief holes have been seted up to bank of screens opposite side tip and excircle face, demountable installation has the excircle sieve on the relief hole, the bank of screens inner cavity is located with a definite angle equipartition to interior sieve for promote the material.
Preferably, the installation angle of the inner screen plate and the tangential direction of the rotating direction of the rotary screen form an acute angle, specifically 50-60 degrees.
Preferably, the rotary screen driving part comprises a motor, a bearing box and a transmission shaft which are arranged outside the shell, the output end of the motor is connected with the end part of the transmission shaft inserted in 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.
Preferably, the two ends of the discharge chute are fixedly provided with hanging frames, 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 the material to flow in; the grinding disc is positioned below the outlet of the blanking cone and is in a rotating state; the grinding rollers are uniformly distributed on the grinding disc and used for grinding materials on the grinding disc; the grinding mill hopper is arranged on the periphery of the grinding disc and used for collecting the screened materials; and the in-mill screening and lifting device is arranged between two adjacent grinding rollers and 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 machine frame for supporting the housing via a rocker arm.
Compared with the prior art, the invention has the beneficial effects that: through screening hoisting device in the mill tentatively sieve the whole material of grinding and the coarse fodder that will sieve out promotes and flows back to the mill center, for the outer loop mill of general structure, the circulation route of the coarse grain material that this device will once grind the production is from mill hopper → transportation belt → lifting machine → selection powder machine → unloading internal cone change for approximate mill internal direct circulation, saved this part coarse grain transportation greatly and promoted the mechanical energy who consumes, and reduced the granule volume of income selection powder machine, the amount of wind and the wind pressure that has reduced the needs of selection powder machine, the energy consumption of saving the fan. 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 illustrated 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 structural 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 present invention;
FIG. 3 is a longitudinal cross-sectional view of an in-mill screen lifting apparatus according to an embodiment of the present invention;
FIG. 4 is a schematic view showing the flow direction of the material in the vertical roller mill according to the embodiment of the present invention;
FIG. 5 is a partial cross-sectional view of an in-mill screen lifting apparatus according to an embodiment of the present invention;
FIG. 6 is a schematic structural view of a grinding disc according to an embodiment of the present invention;
FIG. 7 is a schematic structural 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 in accordance with an embodiment of the present invention.
Reference numbers in the figures: the grinding device comprises a shell 1, a blanking cone 2, a grinding disc 3, a grinding roller 4, a motor 5, a bearing box 6, a transmission shaft 7, a rotary screen 8, a screen frame 801, an outer circle screen plate 802, an inner circle screen plate 803, a discharge chute 9, a hanging bracket 10, a collecting hopper 11, an outer circle plate 1101, an inclined plate 1102, a hopper outlet 1103, an inner circle plate 1104 and a mill hopper 12.
Detailed Description
It is easily understood that according to the technical solution of the present invention, a person skilled in the art can propose various alternative structures and implementation ways without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical aspects of the present invention, and should not be construed as all of the present invention or as limitations or limitations on the technical aspects of the present invention.
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 grinding disc 3, a grinding roller 4, a mill hopper 12 and an in-mill screening and lifting device. The blanking cone 2 is arranged in the shell 1 and 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 rolls 4 are uniformly distributed on the grinding disc 3 and are used for crushing materials on the grinding disc 3; the mill hopper 12 is arranged at the periphery of the grinding disc 3 and used for collecting screened materials.
In a specific embodiment, the number of grinding rollers 4 is 4, which are evenly distributed over the grinding disc 3, and the grinding rollers 4 are arranged on a machine frame (not shown) for supporting the housing by means of rocker arms (not shown). Correspondingly, the number of the screening and lifting devices in the mill is 4, the screening and lifting devices are arranged between two adjacent grinding rolls 4 and are used for screening materials and returning the screened coarse materials to the grinding disc 3 for grinding again.
The grinding disc 3 is in a convex structure with a convex middle part and a concave periphery, when the grinding disc works, coarse materials enter the center of the grinding disc 3 from the discharging cone 2, 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 above-mentioned in-mill screening and lifting device includes a collecting hopper 11, a rotary screen 8, a discharging chute 9 and a rotary screen driving part. The material collecting hopper 11 is arranged at the periphery of the grinding disc 3 between two adjacent grinding rollers 4, and a gap is formed between the inner side of the material 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 positioned below the collecting hopper 11 and used for lifting the materials discharged from the collecting hopper 11 to the top end part of the rotary screen 8; the discharge chute 9 is arranged above the grinding disc 3 in a high-outside and low-inside posture, the top end part of the discharge chute 9 is positioned right below the top end part of the rotary screen 8, the two ends of the discharge chute 9 are fixedly provided with the hanging frames 10, and the upper parts of the hanging frames 10 are 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 to 6, the above-mentioned aggregate bin 11 includes an outer ring plate 1101, an inclined plate 1102, a bin outlet 1103 and an inner ring plate 1104, the outer ring plate 1101 and the inner ring plate 1104 are located on 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 as to ensure that all the materials thrown out from the edge of the grinding disc 3 fall into the aggregate bin. 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 inclined downwards towards the middle part and connected with a hopper outlet 1103 arranged in the middle part of the inclined plate 1102, 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 above-mentioned rotary screen 8 includes a screen frame 801, an outer circular screen plate 802 and an inner screen plate 803, the screen frame 801 is close to a side end face of the discharging chute 9 and has an opening, which can be used for the end of the discharging chute 9 and the end of the collecting hopper 11 to extend into, a plurality of discharging holes are provided at the other side end of the screen frame 801 and the outer circular face, the outer circular screen plate 802 is detachably mounted on the discharging holes, and the outer circular screen plate 802 is a plurality of pieces and is easy to fix and. The inner screen plates 803 are all arranged in the cavity inside the screen frame 801 at a certain angle, so that the inside of the screen frame 801 forms a screening chamber for lifting and screening materials. The installation angle of the inner screen plate 803 forms an acute angle, specifically 50 to 60 °, preferably 55 °, with the tangential direction of the rotating screen 8.
It can be understood that the outer screen plate 802 and the inner screen plate 803 are provided with screen holes according to the required material particle size.
The rotary screen driving part comprises a motor 5, a bearing box 6 and a transmission shaft 7 which are arranged outside the shell 1, the output end of the motor 5 is connected with the end part of the transmission shaft 7 inserted in 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 a bearing is arranged in the bearing box 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 the 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 is running, the material enters the center of the millstone 3 from the blanking cone 2 of the mill, then is thrown into the bottom of the grinding roller 4 by the rotating millstone 3 for grinding, the ground material is thrown out of the outer edge of the millstone 3 under the action of centrifugal force, and the ground material is collected to the hopper outlet 1103 and discharged under the action of the blocking of the outer ring plate 1101 of the collecting hopper 11 and the inclined plate 1102 thereof, as shown in fig. 4. Since the hopper outlet 1103 of the collecting hopper 11 faces the lower position of the center of the rotary screen 8, all the material discharged from the collecting hopper 11 falls into the rotary screen 8. Because the rotating speed of the grinding disc 3 is constant, the material on the surface of the grinding disc flows basically smoothly, and the material is fully distributed on the whole upper surface of the grinding disc 3, the material thrown into each area of the aggregate bin 11 in the same time period is basically equal, namely the material entering each rotary screen 8 is basically consistent. After the materials enter the rotary screen 8, the materials are lifted upwards along the circumferential direction under the action of the inner screen plate 803, meanwhile, due to the change of the material flowing direction, the materials are scattered through rolling, rebounding and the like in the rotary screen 8, the materials of qualified particles fall through the screen holes of the outer screen plate and the inner screen plate 803, enter the mill hopper 12, and enter a powder selecting process after being discharged. The large-particle materials are kept in the screening chamber of the rotary screen 8 and continuously lifted upwards along the circumferential direction, and because the inner screening plate 803 is installed according to a specific angle, the materials start to slide downwards along the surface of the inner screening plate 803 under the action of weight after being lifted to a certain height, and the falling point of the sliding falling is positioned in the bearing range of the discharging chute 9. The top end of the discharging chute 9 extends into the rotary screen 8 to receive large-particle materials which slide down from the inner sieve 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 self 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 grinding disc 3. Compared with an external circulation mill with a general structure, the device directly circulates the circulation path of coarse particle materials generated by primary grinding from a mill hopper → a conveying belt → a hoisting machine → a powder concentrator → a blanking internal taper to an approximate mill, greatly saves the mechanical energy consumed by the transportation and the lifting of the coarse particles, reduces the particle amount entering the powder concentrator, reduces the required air volume and air pressure of the powder concentrator, and saves the energy consumption of a fan.
It should be understood that the in-mill screening and lifting device disclosed by the invention is also very suitable for energy-saving modification of changing a vertical mill with wind lifting into an external circulation mill which is greatly existed in the market at present. The main grinding parts and the supporting structure of the existing mill do not need to be modified, the installed power and the specification of new lifting equipment, a fan and the like can be greatly reduced, and one-time investment and capital construction 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 can make various changes and modifications to the above-described embodiments without departing from the technical spirit of the present invention, and such changes and modifications should fall within the protective scope of the present invention.
Claims (8)
1. The utility model provides a sieve and promote device in mill, is applied to on the vertical roller mill, the vertical roller mill includes the casing, does rotary motion's mill and locates be used for smashing a plurality of grinding rollers of material on the mill, its characterized in that, the device includes:
the material collecting hopper is arranged on the periphery of the grinding disc between every two adjacent grinding rollers, and a gap is formed between the inner side of the material collecting hopper and the outer wall of the grinding disc;
the rotary screen is arranged outside the collecting hopper, and the bottom end part of the rotary screen is positioned below the collecting hopper and used for lifting the materials discharged from the collecting hopper to the top end part of the rotary screen;
the discharging chute is arranged above the grinding disc 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.
2. The in-mill screening and lifting device of claim 1, wherein the collection hopper comprises an outer ring plate, an inclined 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 that of the edge of the grinding disc, the height of the outer ring plate is higher than that of the edge of the grinding disc, the inclined plate is fixedly arranged between the outer ring plate and the inner ring plate, and two ends of the inclined plate are inclined downwards towards the middle part and connected with the hopper outlet arranged in the middle part of the inclined plate.
3. The mill inner screening and lifting device according to claim 1, wherein the rotary screen comprises a screen frame, an outer circular screen plate and an inner screen plate, the screen frame is provided with an opening near one side end face of the discharging chute for the end part of the discharging chute and the collecting hopper to extend into, a plurality of discharging holes are formed in the other side end part of the screen frame and the outer circular surface, the outer circular screen plate is detachably mounted on the discharging holes, and the inner screen plate is uniformly distributed at a certain angle in the inner cavity of the screen frame and used for lifting materials.
4. An in-mill screen lifting device according to claim 3, characterised in that the mounting angle of the inner screen deck is acute, in particular 50-60 °, to the tangential direction of the rotation direction of the rotary screen.
5. The in-mill screening and lifting device of claim 1, wherein the rotary screen driving part comprises a motor, a bearing box and a transmission shaft which are arranged outside the housing, the output end of the motor is connected with the end part of the transmission shaft inserted in 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.
6. The in-mill screening and lifting device of claim 1, wherein hangers are fixedly arranged at two ends of the discharge chute, and the upper parts of the hangers are fixedly connected with the shell.
7. A vertical roller mill characterized by comprising:
a housing;
the blanking cone is arranged in the shell and used for guiding the material to flow in;
the grinding disc is positioned below the outlet of the blanking cone and is in a rotating state;
the grinding rollers are uniformly distributed on the grinding disc and used for grinding materials on the grinding disc;
the grinding mill hopper is arranged on the periphery of the grinding disc and used for collecting the screened materials;
and the in-mill screening lifting device of any one of claims 1 to 6, which is arranged between two adjacent grinding rollers and is used for screening materials and returning screened coarse materials to the grinding disc for regrinding.
8. The vertical roller mill according to claim 7, characterized in that the grinding rollers are arranged on a frame for supporting the shell by means of 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 |
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| Publication Number | Publication Date |
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| CN112827579A true CN112827579A (en) | 2021-05-25 |
| CN112827579B CN112827579B (en) | 2023-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110160525.1A Active CN112827579B (en) | 2021-02-05 | 2021-02-05 | Screening lifting device in mill and vertical roller mill |
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| WO2014067688A1 (en) * | 2013-08-19 | 2014-05-08 | Loesche Gmbh | Vertical roller mill |
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| 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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| CN112827579B (en) | 2023-12-12 |
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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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