CN203540629U - Gradually-changed rolling type HP (High Power) coal mill - Google Patents
Gradually-changed rolling type HP (High Power) coal mill Download PDFInfo
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- CN203540629U CN203540629U CN201320709451.3U CN201320709451U CN203540629U CN 203540629 U CN203540629 U CN 203540629U CN 201320709451 U CN201320709451 U CN 201320709451U CN 203540629 U CN203540629 U CN 203540629U
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- liner plate
- roller
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- mill bowl
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Abstract
The utility model relates to a gradually-changed rolling type HP (High Power) coal mill. According to the gradually-changed rolling type HP coal mill, the outer surface of a roller sleeve of a milling roller is overlaid with a wear-resisting alloy to form a roller tyre type milling roller with a cross section which is in a semi-circular-arc-shaped structure; the inner side surface of a lining plate is overlaid with a wear-resisting alloy to form a circular-arc-shaped structure which is inwards concave and is adapted to the shape of the roller tyre type milling roller; the outer side surface of the lining plate is connected with a milling bowl by a flat key; the small end of the lining plate is used for pressing a milling bowl hub by a milling bowl clamping ring; a milling bowl extending baffling ring is fixedly mounted at the large end of the lining plate and on the milling bowl hub; and a gap is reserved between the inner wall of the milling bowl extending baffling ring and the large end of the lining plate. According to the scheme, hard coal can be discharged as coal gangues so that the discharging amount of the coal gangues is reduced and the working efficiency of milling the coal is improved.
Description
Technical field
The utility model relates to the technical field of HP type coal pulverizer, especially a kind of gradual change compaction type HP type coal pulverizer.
Background technology
In known technical field, coal pulverizer is divided into the models such as vertical pulverizer, high-pressure overhang roll mill, middling speed micropowder grinding, super-pressure trapezoidal mill, Raymond mill, and coal pulverizer is by coal crusher and wears into the machinery of coal dust, and it is the important auxiliary equipment of coal-powder boiler.Coal-grinding process is that coal is broken and the not disconnected process increasing of coal pulverizer of surface area, and will increase new surface area, must overcome the intermolecular adhesion of solid, thereby need consumed energy.Coal by being ground into coal dust, is mainly by crushing, smashes and grind three kinds of modes and carry out in coal pulverizer, and the energy of wherein crushing process consumption is economized most, and grinding process is taken energy most.Various coal pulverizers all have two or three above-mentioned mode concurrently in pulverizing process, but take which kind of as leading the type depending on coal pulverizer.
At present, the grinding roller of HP coal pulverizer mainly adopts the grinding roller of pyramidal structure, and as shown in Figure 4, mill bowl liner plate is flat liner plate.HP type Roller of Coal Grinder is shaped as taper, and mill bowl liner plate is flat liner plate, and during installation, angle is horizontal by 20 °.During duty, the bus of grinding roller is parallel with mill bowl liner plate, between grinding roller and mill bowl liner plate, generally has 3～5mm gap.When grind coal, forming the working forms that line linearity is milled, for the bituminous coal of general high-quality etc., is easily to grind; When running into harder raw coal, during coal pulverizer work, the contact of the grinding part grinding from the stressing conditions HP of vertical cross section is linear, and the pressure of milling is uniform, and skidding easily appears in grinding roller, and raw coal cannot fully be milled.Therefore compared with hard raw coal, at the active force of mill bowl centrifugal force, be thrown to stone coal discharge region and discharged by coal pulverizer, the main cause that in Here it is pebble coal, raw coal can increase, thus make some performance parameter cannot reach designing requirement.
Summary of the invention
The technical problems to be solved in the utility model is: overcome the problems referred to above, a kind of gradual change compaction type HP type coal pulverizer is provided.
The utility model solves the technical scheme that its technical problem adopts: a kind of gradual change compaction type HP type coal pulverizer, comprise the bearing pedestal of grinding roller with Burnisher apparatus, described bearing pedestal of grinding roller is arranged on mill bowl hub, and on described bearing pedestal of grinding roller, be bolted and fixed with grinding roller roller shell, end at described mill bowl hub is provided with mill bowl, centered by the central axis of described mill bowl, interior sideway swivel at described mill bowl is distributed with some blocks of liner plates, on the outer surface of described grinding roller roller shell, build-up wear-resistant alloy is the roller tire formula grinding roller of semicircular arc structure to form cross section, and build-up wear-resistant alloy is to form the arc-shaped structure that caves inward shape and adapt with the profile of roller tire formula grinding roller on the inner surface of described liner plate, the outer surface of described liner plate is connected with mill bowl by flat key, the small end of described liner plate compresses by mill bowl clamping ring and mill bowl hub, be positioned at the large end place of liner plate and on mill bowl hub, be installed with mill bowl extension baffle ring, between the described mill bowl extension inwall of baffle ring and the large end of liner plate, be provided with gap.
Further, as a kind of concrete embodiment, gap in the utility model between adjacent two blocks of liner plates is not more than 1.5mm, and described liner plate is centered by the central axis of mill bowl, arrange successively in the counterclockwise direction in the inner side of mill bowl, and the gap between the liner plate in initial and end two ends is not more than 3mm.
Further, in order to regulate gap according to the situation of raw coal, described in the utility model, between liner plate, be provided with the pad that regulates gap to use.
Further, as a kind of concrete embodiment, the gap that the bowl of mill described in the utility model extends between the inwall of baffle ring and the large end of liner plate is not more than 0.4mm.
Further, as a kind of concrete regulative mode, the utility model is provided with isolation pad described mill between bowl inwall that extends baffle ring and liner plate, by isolation pad, carrys out adjusting play size.
The beneficial effects of the utility model are: the utility model is optimized design for grinding roller and the mill bowl liner plate of HP type coal pulverizer, adopt roller tire formula grinding roller, be the mill bowl liner plate of groove type curved face type structure, make ature of coal harder in raw coal can effectively carry out interlock, solve skidding, and because mill bowl lining plate structure adopts groove type curved face type structure, raw coal is difficult for being got rid of to stone coal discharge region under the effect of centrifugal force, thereby has reduced the discharge capacity of pebble coal.
From the contact of the grinding part of the former HP type of the stressing conditions coal pulverizer of vertical cross section, it is linear, the pressure of milling is uniform, and the grinding roller of new construction is wheel the form of the foetus, lining tile is curved surface shaped, grinding part is two curves, contact is some contact, and grinding pressure is gradual change, the grinding pressure maximum of some contact area.So under same spring pressure, large grinding pressure more easily pulverizes the coal of hard greatly.So just avoided that hard coal is used as to gangue and drained, also just reduced the discharge capacity of gangue, improved the operating efficiency of coal-grinding.
This programme central roll tire formula grinding roller and liner plate all adopt the mode at working face build-up wear-resistant alloy after casting processing, synchronize actual life with grinding roller, after wearing and tearing, can directly carry out online built-up welding reparation simultaneously, not only rehabilitation expense is cheap, compared with directly changing liner plate with traditional structure, a large amount of recondition expenses, time and manpower have been saved simultaneously.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the local enlarged diagram of Fig. 1;
Fig. 3 is the structural representation of mill bowl in the utility model;
Fig. 4 is the structural representation of existing HP type coal pulverizer;
In figure: 1. Burnisher apparatus, 2. bearing pedestal of grinding roller, 3. grinding roller roller shell, 4. mill bowl hub, 5. mill bowl, 6. liner plate, 7. roller tire formula grinding roller, 8. flat key, 9. mill bowl clamping ring, 10. mill bowl extends baffle ring, 11. isolation pads.
The specific embodiment
By reference to the accompanying drawings the utility model is described in further detail now.These accompanying drawings are the schematic diagram of simplification, and basic structure of the present utility model is only described in a schematic way, and therefore it only shows the formation relevant with the utility model.
As Fig. 1, the preferred embodiment of a kind of gradual change compaction type of the utility model shown in Fig. 2 and Fig. 3 HP type coal pulverizer, comprise the bearing pedestal of grinding roller 2 with Burnisher apparatus 1, described bearing pedestal of grinding roller 2 is arranged on mill bowl hub 4, and be bolted and fixed with grinding roller roller shell 3 on described bearing pedestal of grinding roller 2, end at described mill bowl hub 4 is provided with mill bowl 5, centered by the central axis of described mill bowl 5, interior sideway swivel at described mill bowl 5 is distributed with some blocks of liner plates 6, on the outer surface of described grinding roller roller shell 3, build-up wear-resistant alloy is the roller tire formula grinding roller 7 of semicircular arc structure to form cross section, and build-up wear-resistant alloy is to form the arc-shaped structure that caves inward shape and adapt with the profile of roller tire formula grinding roller 7 on the inner surface of described liner plate 6, the outer surface of described liner plate 6 is connected with mill bowl 5 by flat key 8, the small end of described liner plate 6 compresses by mill bowl clamping ring 9 and mill bowl hub 4, be positioned at the large end place of liner plate 6 and on mill bowl hub 4, be installed with mill bowl extension baffle ring 10, between the described mill bowl extension inwall of baffle ring 10 and the large end of liner plate 6, be provided with gap.
Gap between two blocks of adjacent liner plates 6 is not more than 1.5mm, and described liner plate 6 is centered by the central axis of mill bowl 5, arrange successively in the counterclockwise direction in the inner side of mill bowl 5, and the gap between the liner plate in initial and end two ends 6 is not more than 3mm, between described liner plate 6, be provided with the pad that regulates gap to use.
The gap that described mill bowl extends between the inwall of baffle ring 10 and the large end of liner plate 6 is not more than 0.4mm, described mill between bowl inwall that extends baffle ring 10 and liner plate 6, is provided with isolation pad 11, by isolation pad 11, carrys out adjusting play size.
The utility model is optimized design for grinding roller and the mill bowl liner plate of HP type coal pulverizer, adopt roller tire formula grinding roller, be the mill bowl liner plate of groove type curved face type structure, make ature of coal harder in raw coal can effectively carry out interlock, solve skidding, and because mill bowl lining plate structure adopts groove type curved face type structure, raw coal is difficult for being got rid of to stone coal discharge region under the effect of centrifugal force, thereby has reduced the discharge capacity of pebble coal.
From the contact of the grinding part of the former HP type of the stressing conditions coal pulverizer of vertical cross section, it is linear, the pressure of milling is uniform, and the grinding roller of new construction is wheel the form of the foetus, lining tile is curved surface shaped, grinding part is two curves, contact is some contact, and grinding pressure is gradual change, the grinding pressure maximum of some contact area.So under same spring pressure, large grinding pressure more easily pulverizes the coal of hard greatly.So just avoided that hard coal is used as to gangue and drained, also just reduced the discharge capacity of gangue, improved the operating efficiency of coal-grinding.
This programme central roll tire formula grinding roller and liner plate all adopt the mode at working face build-up wear-resistant alloy after casting processing, synchronize actual life with grinding roller, after wearing and tearing, can directly carry out online built-up welding reparation simultaneously, not only rehabilitation expense is cheap, compared with directly changing liner plate with traditional structure, a large amount of recondition expenses, time and manpower have been saved simultaneously.
For the grinding effect in this programme, in the wearing and tearing later stage of the part of milling, less on the impact of exerting oneself of coal pulverizer, 5% left and right that declines of exerting oneself during only than normal work, and former HP type coal pulverizer is because when work is line contact, in the part wearing and tearing later stage of milling, exerts oneself and will decline 10%～20%.Make a call to a vivid metaphor, the structure of this programme seems garlic pestle and bowl, and wearing and tearing are minimum on its operating efficiency impact, and former HP type coal pulverizer just looks like that kitchen knife chops up the vegetables on the chopping board, and after wearing and tearing, just " has connected cutter ", thereby has affected operating efficiency.
Take above-mentioned foundation desirable embodiment of the present utility model as enlightenment, by above-mentioned description, relevant staff can, not departing from the scope of this invention technological thought, carry out various change and modification completely.The technical scope of this invention is not limited to the content on description, must determine its technical scope according to claim scope.
Claims (5)
1. a gradual change compaction type HP type coal pulverizer, comprise the there is Burnisher apparatus bearing pedestal of grinding roller (2) of (1), described bearing pedestal of grinding roller (2) is arranged on mill bowl hub (4), and on described bearing pedestal of grinding roller (2), be bolted and fixed with grinding roller roller shell (3), in the end of described mill bowl hub (4), mill bowl (5) is installed, centered by the central axis of described mill bowl (5), interior sideway swivel at described mill bowl (5) is distributed with some blocks of liner plates (6), it is characterized in that: on the outer surface of described grinding roller roller shell (3), build-up wear-resistant alloy is the roller tire formula grinding roller (7) of semicircular arc structure to form cross section, and build-up wear-resistant alloy is to form the arc-shaped structure that caves inward shape and adapt with the profile of roller tire formula grinding roller (7) on the inner surface of described liner plate (6), the outer surface of described liner plate (6) is connected with mill bowl (5) by flat key (8), the small end of described liner plate (6) compresses by mill bowl clamping ring (9) and mill bowl hub (4), be positioned at the large end place of liner plate (6) and on mill bowl hub (4), be installed with mill bowl extension baffle ring (10), between the inwall of described mill bowl extension baffle ring (10) and the large end of liner plate (6), be provided with gap.
2. a kind of gradual change compaction type HP type coal pulverizer as claimed in claim 1, it is characterized in that: the gap between adjacent two blocks of liner plates (6) is not more than 1.5mm, and described liner plate (6) is centered by the central axis that grinds bowl (5), arrange successively in the counterclockwise direction in the inner side of mill bowl (5), and the gap between the liner plate in initial and end two ends (6) is not more than 3mm.
3. a kind of gradual change compaction type HP type coal pulverizer as claimed in claim 1 or 2, is characterized in that: between described liner plate (6), be provided with the pad that regulates gap to use.
4. a kind of gradual change compaction type HP type coal pulverizer as claimed in claim 1, is characterized in that: the gap between inwall and the large end of liner plate (6) of described mill bowl extension baffle ring (10) is not more than 0.4mm.
5. a kind of gradual change compaction type HP type coal pulverizer as described in claim 1 or 4, it is characterized in that: described mill between bowl inwall that extends baffle ring (10) and liner plate (6), be provided with isolation pad (11), by isolation pad (11), carry out adjusting play size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320709451.3U CN203540629U (en) | 2013-11-12 | 2013-11-12 | Gradually-changed rolling type HP (High Power) coal mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320709451.3U CN203540629U (en) | 2013-11-12 | 2013-11-12 | Gradually-changed rolling type HP (High Power) coal mill |
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| CN203540629U true CN203540629U (en) | 2014-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320709451.3U Withdrawn - After Issue CN203540629U (en) | 2013-11-12 | 2013-11-12 | Gradually-changed rolling type HP (High Power) coal mill |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103567019A (en) * | 2013-11-12 | 2014-02-12 | 北京新源宝通电力设备有限公司 | Gradient grinding type HP (High Power) type coal mill |
| CN105080664A (en) * | 2015-06-24 | 2015-11-25 | 舞阳钢铁有限责任公司 | Quick adjustment technology for gaps between grinding rollers of coal mill and liner plate of grinding bowl |
| CN106890705A (en) * | 2017-04-18 | 2017-06-27 | 长春发电设备总厂 | A kind of medium-speed pulverizer |
| CN110000513A (en) * | 2019-04-12 | 2019-07-12 | 江苏瑞米克金属技术有限公司 | A kind of manufacture of medium-speed pulverizer separator guiding device wear surface and reproducing method |
| CN110354956A (en) * | 2019-07-04 | 2019-10-22 | 中国电建集团长春发电设备有限公司 | A kind of mill assembly of medium-speed pulverizer |
-
2013
- 2013-11-12 CN CN201320709451.3U patent/CN203540629U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103567019A (en) * | 2013-11-12 | 2014-02-12 | 北京新源宝通电力设备有限公司 | Gradient grinding type HP (High Power) type coal mill |
| CN103567019B (en) * | 2013-11-12 | 2016-07-20 | 北京新源宝通电力设备有限公司 | A kind of gradual change compaction type HP type coal pulverizer |
| CN105080664A (en) * | 2015-06-24 | 2015-11-25 | 舞阳钢铁有限责任公司 | Quick adjustment technology for gaps between grinding rollers of coal mill and liner plate of grinding bowl |
| CN106890705A (en) * | 2017-04-18 | 2017-06-27 | 长春发电设备总厂 | A kind of medium-speed pulverizer |
| CN106890705B (en) * | 2017-04-18 | 2019-09-17 | 中国电建集团长春发电设备有限公司 | A kind of medium-speed pulverizer |
| CN110000513A (en) * | 2019-04-12 | 2019-07-12 | 江苏瑞米克金属技术有限公司 | A kind of manufacture of medium-speed pulverizer separator guiding device wear surface and reproducing method |
| CN110354956A (en) * | 2019-07-04 | 2019-10-22 | 中国电建集团长春发电设备有限公司 | A kind of mill assembly of medium-speed pulverizer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140416 Effective date of abandoning: 20160720 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |