CN104549653A - Coal mill - Google Patents
Coal mill Download PDFInfo
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- CN104549653A CN104549653A CN201310504416.2A CN201310504416A CN104549653A CN 104549653 A CN104549653 A CN 104549653A CN 201310504416 A CN201310504416 A CN 201310504416A CN 104549653 A CN104549653 A CN 104549653A
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- coal
- separator
- mill bowl
- mill
- rotor block
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Abstract
The invention discloses a coal mill. The coal mill comprises a side body device, wherein an inner cavity of the side body device is provided with a milling bowl and an impeller device; the top of the side body device is fixedly connected with a separator body device; a plurality of sets of milling roll devices are distributed in an inner cavity of the separator body device, and are positioned above the milling bowl and the impeller device; the top of each milling roll device is fixedly connected with a pull rod bolt; the upper part of each milling roll device is provided with a hydraulic loading device; a separator top cover is fixedly arranged on the top part of the separator body device; an inner cavity of the separator top cover is provided with a rotor body which can be used for achieving driving by a rotor driving device; a coal dropping pipe is arranged at the center of the top of the separator top cover; and at least one coal-powder pipeline is arranged at the top of the separator top cover. The coal mill disclosed by the invention integrates the advantages of an HP coal mill and an SM coal mill, discards the defects of the HP coal mill and the SM coal mill and is a high-efficiency and economic coal mill.
Description
Technical field
The present invention relates to a kind of coal pulverizer.
Background technology
On domestic and international medium-speed pulverizer market, more competitive coal pulverizer one is HP coal pulverizer at present, and another kind is SM coal pulverizer, and two kinds of coal pulverizers respectively have pluses and minuses.The advantage of HP coal pulverizer is that structure is simple, operational reliability is high, maintenance is convenient, downtime is short and price comparison is low; Its shortcoming is that grinding efficiency is not high enough, and coal-air ratio is bigger than normal, and boiler efficiency can not be played completely.The advantage of SM coal pulverizer is that grinding efficiency is high, and coal-air ratio is little, and coal powder density is high, and SM coal-grinding function guarantees that boiler plays more high efficiency; Its shortcoming is structure relative complex, and foundry goods is many, and flowing resistance is large, and price is relatively high.Therefore two kinds of coal pulverizers have certain room for improvement, but new mill type market also not having both advantages concurrently and abandon its shortcoming occurs.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of coal pulverizer, and it can have the advantage of HP coal pulverizer and SM coal pulverizer concurrently and abandon its shortcoming.
For solving the problems of the technologies described above, the technical solution of coal pulverizer of the present invention is:
Comprise side body set 5, side body set 5 is directly seated on basis; The inner chamber of side body set 5 is provided with mill bowl and impeller unit 8; The top of side body set 5 is fixedly connected with separator body device 9; The inner chamber of separator body device 9 has been uniformly distributed circumferentially many cover Burnisher apparatus 4, and Burnisher apparatus 4 hangs in separator body device 9 respectively by gudgeon 13, and Burnisher apparatus 4 can rotate up and down centered by gudgeon 13 in vertical plane; Burnisher apparatus 4 is positioned at the top of mill bowl and impeller unit 8; The working face of the grinding roller 41 of Burnisher apparatus 4 is the conical surface, and the working face of the mill bowl 81 of mill bowl and impeller unit 8 is inclined-plane; Gap is provided with between grinding roller 41 and mill bowl 81; The top of Burnisher apparatus 4 is fixedly connected with one end of stay-bolt 12, and the other end of stay-bolt 12 stretches out the inner chamber of separator body device 9, and is realized and being fixedly connected with of separator body device 9 by pull-rod nut 121; Pull-rod nut 121 is arranged at the outside of separator body device 9; Rotating rod nut 121 outside coal pulverizer, makes stay-bolt 12 move in the horizontal direction, thus drives Burnisher apparatus 4 to rotate around gudgeon 13, realizes the adjustment to gap length between grinding roller 41 and mill bowl 81; The top of Burnisher apparatus 4 is provided with hydraulic loading device 3; Loading force when hydraulic loading device 3 is for providing coal pulverizer to mill; The top of separator body device 9 is fixedly installed separator top cover 10; The inner chamber of separator top cover 10 is provided with rotor block 2; Rotor block 2 is pyramidal structure, plays the effect being separated coal dust; Rotor block 2 realizes driving by rotor block drive unit 1; Rotor block drive unit 1 is belt transmission; The top center of separator top cover 10 is provided with coal spout 11, and coal spout 11 stretches into the inner chamber of separator body device 9; The top of separator top cover 10 is provided with at least one pulverized coal channel 15.
Between the central axis of described Burnisher apparatus 4 and horizontal plane, shape has angle α 1; Described grinding roller 41 and between the mill faying face of bowl 81 and horizontal plane shape to have angle α 2.
Described first angle α 1 is 20 ° ~ 30 °; Described second angle α 2 is 10 ° ~ 20 °.
Described mill bowl is connected planetary gear reduction box 6 with impeller unit 8, and planetary gear reduction box 6 is realized driving by main motor, drives mill bowl and impeller unit 8 to rotate; Planetary gear reduction box 6 is arranged at the bottom of side body set 5, and the bottom surface of side body set 5 is higher than the bottom surface absolute altitude of planetary gear reduction box 6.
The outer wall of described mill bowl and impeller unit 8 is fixedly installed screeding device 7, and screeding device 7 is for scraping the foreign material falling into side body set 5 inner chamber.
Described separator top cover 10 is up big and down small structure, for retraining the flow direction of wind powder mixture, provides passage to ensure for coal dust is effectively separated at rotor block 2 place.
Raw coal drops on after mill bowl and impeller unit 8 from described coal spout 11, mill bowl and impeller unit 8 is driven to rotate by planetary gear reduction box 6, raw coal radially moves under the influence of centrifugal force outwardly, mill bowl and impeller unit 8 form one deck coal bed, and the Burnisher apparatus that coal bed can rotate around gudgeon 13 passes through for 4 times; Coal bed produces a support force makes Burnisher apparatus 4 be rotated counterclockwise around gudgeon 13, hydraulic loading device 3 produces a loading force makes Burnisher apparatus 4 turn clockwise around gudgeon 13, thus abrasive power is applied on coal bed by the grinding roller 41 rotated, raw coal is ground into coal dust between grinding roller 41 and mill bowl 81; The raw coal doing radial direction and circumference movement carries the coal dust be broken and crosses the inner chamber that the outer rim of grinding bowl 81 enters separator body device 9; In the process of lapping of coal, less lighter coal particle is blown afloat from mill bowl 81 outer rim by the pumped (conveying) medium in cavity continuously; Pumped (conveying) medium rises along the outer rim of the mill bowl 81 rotated, and the impeller being arranged at the outer rim of mill bowl 81 makes air-flow be tending towards vertical direction; In mill bowl 81 outer rim, less lighter coal grain is carried upwards by air-flow, and the heavy foreign debris not easily ground falls into the inner chamber of side body set 5 through air-flow; Lighter coal grain is carried the rotor block 2 being entered rotation by separator body device 9 by air-flow, when air-flow is close to rotor block 2, coal grain in air-flow is because being subject to the shock of rotor block 2, larger coal grain will be dished out by rotor block 2, less coal grain is then allowed through rotor block 2, and leaves separator top cover 10 and arrive pulverized coal channel 15; Then be back to mill bowl 81 by the coal grain of dishing out to be re-ground; The foreign debris not easily ground falling into the inner chamber of side body set 5 through air-flow is scraped in the hole on side body set 5 base plate by screeding device 7, then enters gathering system.
The technique effect that the present invention can reach is:
This invention simplifies the supporting mechanism of side body, replace foundry goods with structural member, the belt transmission low with process and assemble required precision replaces gear drive, thus can reduce the manufacturing cost of coal pulverizer.
The present invention's stay-bolt structure replaces caging bolt structure, thus the gap adjustment between the grinding roller of coal pulverizer and mill bowl can be made convenient.
Side of the present invention body set is directly seated on basis, the bottom surface of side body set is higher than the bottom surface absolute altitude of planetary gear reduction box, difference in height between side body set and planetary gear reduction box bottom surface is made up by basis, having abandoned under the similar mill type side bodies such as SM coal pulverizer adopts support to be connected with basis, support bottom surface and reduction box bottom surface at the labyrinth of same absolute altitude, thus simplify the supporting mechanism of side body.
The present invention arranges and drives reductor between two pulverized coal channels, and drives rotor block to rotate by belt transmission, has abandoned the gear-driven form that the similar mill types such as SM coal pulverizer adopt.
The present invention drives rotor block by belt transmission, can reduce the requirement to accuracy of gear when manufacturing and assemble, reduce manufacturing cost; To no longer need lubricating oil bath carry out oilgear when belt transmission scene is run simultaneously, and effectively can reduce maintenance difficulties and the maintenance cost of on-the-spot operation.
Present invention improves over the structure in region of milling, three Burnisher apparatus are arranged with in the situation that coal pulverizer barrel diameter is constant, because the angle α 2 formed between the faying face of the angle α 1 that formed between the central axis of Burnisher apparatus and horizontal plane and grinding roller and mill bowl and horizontal plane determines the full-size of grinding roller, the full-size of grinding roller determines the maximum area of effectively milling during coal pulverizer work; Angle α 1 and α 2 is reduced, the size of grinding roller can be made effectively to be amplified, to improve the area of effectively milling during coal pulverizer work, thus effectively improve the grinding efficiency of coal pulverizer.
The present invention mixes the advantage of HP coal pulverizer and SM coal pulverizer, abandon its shortcoming, higher grinding efficiency is had relative to HP coal pulverizer, lower coal-air ratio, higher coal powder density, can play boiler efficiency to a greater degree, simpler relative to SM coal pulverizer structure, overhaul more convenient, price is lower, is a kind of not only efficient but also economic coal pulverizer.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:
Fig. 1 is the schematic diagram of coal pulverizer of the present invention;
Fig. 2 is the schematic diagram in region of milling of the present invention;
Fig. 3 is the schematic diagram that between grinding roller of the present invention and mill bowl, gap adjusts.
Description of reference numerals in figure:
1 is rotor block drive unit, and 2 is rotor block,
3 is hydraulic loading device, and 4 is Burnisher apparatus,
5 is side body set, and 6 is planetary gear reduction box,
7 is screeding device, and 8 is mill bowl and impeller unit,
9 is separator body device, and 10 is separator top cover,
11 is coal spout, and 12 is stay-bolt,
13 is gudgeon, and 14 for driving reductor,
15 is pulverized coal channel,
41 is grinding roller, and 81 is mill bowl,
121 is pull-rod nut.
Detailed description of the invention
As shown in Figure 1, coal pulverizer of the present invention, comprises side body set 5, and side body set 5 is directly seated on basis;
The inner chamber of side body set 5 is provided with mill bowl and impeller unit 8; Mill bowl is connected planetary gear reduction box 6 with impeller unit 8, and planetary gear reduction box 6 is realized driving by main motor, drives mill bowl and impeller unit 8 to rotate; Planetary gear reduction box 6 is arranged at the bottom of side body set 5, and the bottom surface of side body set 5 is higher than the bottom surface absolute altitude of planetary gear reduction box 6;
The outer wall of mill bowl and impeller unit 8 is fixedly installed screeding device 7, and screeding device 7 is for scraping coal pulverizer by the foreign material falling into side body set 5 inner chamber;
The top of side body set 5 is fixedly connected with separator body device 9; The inner chamber of separator body device 9 has been uniformly distributed circumferentially three cover Burnisher apparatus 4, and Burnisher apparatus 4 hangs in separator body device 9 respectively by gudgeon 13;
As shown in Figure 2, between the central axis of Burnisher apparatus 4 and horizontal plane, shape has angle α 1, and Burnisher apparatus 4 can rotate up and down centered by gudgeon 13 in vertical plane; Burnisher apparatus 4 is positioned at the top of mill bowl and impeller unit 8; The working face of the grinding roller 41 of Burnisher apparatus 4 is the conical surface, and the working face of mill bowl 81 of mill bowl and impeller unit 8 is inclined-plane, and between the faying face of grinding roller 41 and mill bowl 81 and horizontal plane, shape has angle α 2; Gap is provided with between grinding roller 41 and mill bowl 81;
α 1 can be 20 ° ~ 30 °; α 2 can be 10 ° ~ 20 °; When α 1 is reduced to 20 ° from 30 °, α 2 is reduced to 10 ° from 20 °, then the area of effectively milling of coal pulverizer can increase by 15%; The grinding efficiency of coal pulverizer can improve about 10%.
The side mouth of side body set 5 is as pumped (conveying) medium entrance; From pumped (conveying) medium entrance to the inner chamber of side body set 5 input pumped (conveying) medium; Pumped (conveying) medium can be hot-air; Pumped (conveying) medium can by being positioned at the primary air fan of coal pulverizer upstream or being positioned at the independently mill exhauster supply in coal pulverizer downstream; Primary air fan provides malleation, and mill exhauster provides negative pressure;
Pumped (conveying) medium mainly contains three effects: 1) for coal pulverizer provides necessary power to make coal dust carry out being separated to control the fineness of coal dust; 2) in the process of lapping of coal, constantly carrying out drying to it makes coal be easy to grinding; 3) power is provided for coal dust is transported to burner hearth;
As shown in Figure 3, the top of Burnisher apparatus 4 is fixedly connected with one end of stay-bolt 12, and the other end of stay-bolt 12 stretches out the inner chamber of separator body device 9, and is realized and being fixedly connected with of separator body device 9 doorframe by pull-rod nut 121; Pull-rod nut 121 is arranged at the outside of separator body device 9;
Rotating rod nut 121 outside coal pulverizer, makes stay-bolt 12 move in the horizontal direction, thus drives Burnisher apparatus 4 to rotate around gudgeon 13, realizes the grinding roller 41 of Burnisher apparatus 4 and the adjustment of gap length between mill bowl and the mill bowl 81 of impeller unit 8;
The present invention regulates the gap between grinding roller and mill bowl by stay-bolt, and whole adjustment process just can complete in coal pulverizer outside, easy to adjust.
The top of Burnisher apparatus 4 is provided with hydraulic loading device 3; Loading force when hydraulic loading device 3 is for providing coal pulverizer to mill;
The top of separator body device 9 is fixedly installed separator top cover 10; Separator top cover 10 is up big and down small structure, for retraining the flow direction of wind powder mixture, provides passage to ensure for coal dust is effectively separated at rotor block place;
The inner chamber of separator top cover 10 is provided with rotor block 2; Rotor block 2 is pyramidal structure, plays the effect being separated coal dust;
Rotor block 2 realizes driving by rotor block drive unit 1; Rotor block drive unit 1 is arranged at the top of separator top cover 10; Rotor block drive unit 1 connects driving reductor 14 by belt transmission;
The top center of separator top cover 10 is provided with coal spout 11, and coal spout 11 stretches into the inner chamber of separator body device 9; The top outer of separator top cover 10 is provided with four pulverized coal channels 15; Reductor 14 is driven to be arranged between adjacent two pulverized coal channels 15;
Coal spout 11 realizes supporting by rotor block drive unit 1, enters the passage of coal pulverizer as coal.
Operation principle of the present invention is as follows:
Raw coal drops on after mill bowl and impeller unit 8 from coal spout 11, mill bowl and impeller unit 8 is driven to rotate by planetary gear reduction box 6, raw coal radially moves under the influence of centrifugal force outwardly, mill bowl and impeller unit 8 form one deck coal bed, and the Burnisher apparatus that coal bed can rotate around gudgeon 13 passes through for 4 times; Coal bed produces a support force makes Burnisher apparatus 4 be rotated counterclockwise around gudgeon 13, hydraulic loading device 3 produces a loading force makes Burnisher apparatus 4 turn clockwise around gudgeon 13, thus abrasive power is applied on coal bed by the grinding roller 41 rotated, raw coal is ground into coal dust between grinding roller 41 and mill bowl 81;
The raw coal doing radial direction and circumference movement carries the coal dust be broken and crosses the inner chamber that the outer rim of grinding bowl 81 enters separator body device 9; In the process of lapping of coal, less lighter coal particle is blown afloat from mill bowl 81 outer rim by the pumped (conveying) medium in cavity continuously;
Pumped (conveying) medium rises along the outer rim of the mill bowl 81 rotated, and the impeller being arranged at the outer rim of mill bowl 81 makes air-flow be tending towards vertical direction; In mill bowl 81 outer rim, less lighter coal grain is carried upwards by air-flow, and the heavy foreign debris not easily ground falls into the inner chamber of side body set 5 through air-flow;
Lighter coal grain is carried the rotor block 2 being entered rotation by separator body device 9 by air-flow, when air-flow is close to rotor block 2, coal grain in air-flow is because being subject to the shock of rotor block 2, larger coal grain will be dished out by rotor block 2, less coal grain is then allowed through rotor block 2, and leave separator top cover 10 and arrive pulverized coal channel 15, enter boiler combustion or be collected and use in order to lower one technique; Then be back to mill bowl 81 by the coal grain of dishing out to be re-ground;
The foreign debris not easily ground falling into the inner chamber of side body set 5 through air-flow is scraped in the hole on side body set 5 base plate by screeding device 7, then enters stone coal collecting system.
Raw coal can be milled into coal dust by the present invention, make its reach can in boiler of power plant the fineness of efficient burning, also can be applicable to steel mill's pulverized coal injection engineering or coal chemical technology for raw coal is milled into coal dust.
Claims (7)
1. a coal pulverizer, is characterized in that: comprise side body set (5), and side body set (5) is directly seated on basis; The inner chamber of side body set (5) is provided with mill bowl and impeller unit (8);
The top of side body set (5) is fixedly connected with separator body device (9); The inner chamber of separator body device (9) has been uniformly distributed circumferentially and has overlapped Burnisher apparatus (4) more, Burnisher apparatus (4) hangs in separator body device (9) respectively by gudgeon (13), and Burnisher apparatus (4) can rotate up and down centered by gudgeon (13) in vertical plane; Burnisher apparatus (4) is positioned at the top of mill bowl and impeller unit (8); The working face of the grinding roller (41) of Burnisher apparatus (4) is the conical surface, and the working face of the mill bowl (81) of mill bowl and impeller unit (8) is inclined-plane; Gap is provided with between grinding roller (41) and mill bowl (81);
The top of Burnisher apparatus (4) is fixedly connected with one end of stay-bolt (12), and the other end of stay-bolt (12) stretches out the inner chamber of separator body device (9), and is realized and being fixedly connected with of separator body device (9) by pull-rod nut (121); Pull-rod nut (121) is arranged at the outside of separator body device (9); Rotating rod nut (121) outside coal pulverizer, makes stay-bolt (12) move in the horizontal direction, thus drives Burnisher apparatus (4) to rotate around gudgeon (13), realizes the adjustment to gap length between grinding roller (41) and mill bowl (81);
The top of Burnisher apparatus (4) is provided with hydraulic loading device (3); Loading force when hydraulic loading device (3) is for providing coal pulverizer to mill;
The top of separator body device (9) is fixedly installed separator top cover (10); The inner chamber of separator top cover (10) is provided with rotor block (2); Rotor block (2) is pyramidal structure, plays the effect being separated coal dust;
Rotor block (2) realizes driving by rotor block drive unit (1); Rotor block drive unit (1) is belt transmission;
The top center of separator top cover (10) is provided with coal spout (11), and coal spout (11) stretches into the inner chamber of separator body device (9); The top of separator top cover (10) is provided with at least one pulverized coal channel (15).
2. coal pulverizer according to claim 1, is characterized in that: form the first angle (α 1) between the central axis of described Burnisher apparatus (4) and horizontal plane; The second angle (α 2) is formed between the faying face of described grinding roller (41) and mill bowl (81) and horizontal plane.
3. coal pulverizer according to claim 1, is characterized in that: described first angle (α 1) is 20 ° ~ 30 °; Described second angle (α 2) is 10 ° ~ 20 °.
4. coal pulverizer according to claim 1, is characterized in that: described mill bowl is connected planetary gear reduction box (6) with impeller unit (8), and planetary gear reduction box (6) is realized driving by main motor, drives mill bowl and impeller unit (8) to rotate; Planetary gear reduction box (6) is arranged at the bottom of side body set (5), and the bottom surface of side body set (5) is higher than the bottom surface absolute altitude of planetary gear reduction box (6).
5. coal pulverizer according to claim 1, is characterized in that: the outer wall of described mill bowl and impeller unit (8) is fixedly installed screeding device (7), and screeding device (7) is for scraping the foreign material falling into side body set (5) inner chamber.
6. coal pulverizer according to claim 1, is characterized in that: described separator top cover (10) is up big and down small structure, for retraining the flow direction of wind powder mixture, provides passage to ensure for coal dust is effectively separated at rotor block (2) place.
7. coal pulverizer according to claim 1, it is characterized in that: raw coal drops on after mill bowl and impeller unit (8) from described coal spout (11), mill bowl and impeller unit (8) is driven to rotate by planetary gear reduction box (6), raw coal radially moves under the influence of centrifugal force outwardly, at mill bowl and impeller unit (8) upper formation one deck coal bed, coal bed passes through under the Burnisher apparatus (4) that can rotate around gudgeon (13); Coal bed produces a support force makes Burnisher apparatus (4) be rotated counterclockwise around gudgeon (13), hydraulic loading device (3) produces a loading force makes Burnisher apparatus (4) turn clockwise around gudgeon (13), thus abrasive power is applied on coal bed by the grinding roller (41) rotated, raw coal is ground into coal dust between grinding roller (41) and mill bowl (81);
The raw coal doing radial direction and circumference movement carries the coal dust be broken and crosses the inner chamber that the outer rim of grinding bowl (81) enters separator body device (9); In the process of lapping of coal, less lighter coal particle is blown afloat from mill bowl (81) outer rim by the pumped (conveying) medium in cavity continuously;
Pumped (conveying) medium rises along the outer rim of the mill bowl (81) rotated, and the impeller being arranged at the outer rim of mill bowl (81) makes air-flow be tending towards vertical direction; In mill bowl (81) outer rim, less lighter coal grain is carried upwards by air-flow, and the heavy foreign debris not easily ground falls into the inner chamber of side body set (5) through air-flow;
Lighter coal grain is carried the rotor block (2) being entered rotation by separator body device (9) by air-flow, when air-flow is close to rotor block (2), coal grain in air-flow is because being subject to the shock of rotor block (2), larger coal grain will be dished out by rotor block (2), less coal grain is then allowed through rotor block (2), and leaves separator top cover (10) arrival pulverized coal channel (15); Then be back to mill bowl (81) by the coal grain of dishing out to be re-ground;
The foreign debris not easily ground falling into the inner chamber of side body set (5) through air-flow is scraped in the hole on side body set (5) base plate by screeding device (7), then enters gathering system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310504416.2A CN104549653A (en) | 2013-10-23 | 2013-10-23 | Coal mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310504416.2A CN104549653A (en) | 2013-10-23 | 2013-10-23 | Coal mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104549653A true CN104549653A (en) | 2015-04-29 |
Family
ID=53067350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310504416.2A Pending CN104549653A (en) | 2013-10-23 | 2013-10-23 | Coal mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104549653A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105833946A (en) * | 2016-04-27 | 2016-08-10 | 江苏方天电力技术有限公司 | Medium-speed coal mill with novel grinding bowl structure |
| CN109718906A (en) * | 2017-10-30 | 2019-05-07 | 阿尔法（江苏）重工科技有限公司 | Discharging valve device |
| CN115007275A (en) * | 2022-05-30 | 2022-09-06 | 中化二建集团有限公司 | Mounting construction method of bowl type medium speed coal mill |
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| CN105833946A (en) * | 2016-04-27 | 2016-08-10 | 江苏方天电力技术有限公司 | Medium-speed coal mill with novel grinding bowl structure |
| CN109718906A (en) * | 2017-10-30 | 2019-05-07 | 阿尔法（江苏）重工科技有限公司 | Discharging valve device |
| CN115007275A (en) * | 2022-05-30 | 2022-09-06 | 中化二建集团有限公司 | Mounting construction method of bowl type medium speed coal mill |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20161206 Address after: 200245 Jiangchuan Road, Shanghai, No. 230, building 1800, No. Applicant after: Shanghai electric heavy milling special equipment Co. Ltd. Applicant after: Shanghai Heavy Machines Plant Co., Ltd. Address before: 200245 Jiangchuan Road, Shanghai, No. 1800, No. Applicant before: Shanghai Heavy Machines Plant Co., Ltd. |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150429 |