CN207756459U - A kind of flyash drum screen - Google Patents
A kind of flyash drum screen Download PDFInfo
- Publication number
- CN207756459U CN207756459U CN201720758331.0U CN201720758331U CN207756459U CN 207756459 U CN207756459 U CN 207756459U CN 201720758331 U CN201720758331 U CN 201720758331U CN 207756459 U CN207756459 U CN 207756459U
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- Prior art keywords
- flyash
- shaft
- pedestal
- wobble drive
- fixed
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- 239000010881 fly ash Substances 0.000 title claims abstract description 40
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 31
- 238000005096 rolling process Methods 0.000 claims abstract description 8
- 230000001105 regulatory effect Effects 0.000 claims description 15
- 238000007599 discharging Methods 0.000 claims description 11
- 230000007246 mechanism Effects 0.000 claims description 11
- 230000003534 oscillatory effect Effects 0.000 claims description 11
- 238000012216 screening Methods 0.000 abstract description 18
- 230000000694 effects Effects 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 6
- 238000013461 design Methods 0.000 abstract description 3
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 3
- 239000010883 coal ash Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- Combined Means For Separation Of Solids (AREA)
Abstract
The utility model discloses a kind of flyash drum screens；It includes pedestal, roll sieve nest, rotary drive motor, funnel, belt conveyor and chute feeder, further include wobble drive frame and hinged support frame, the wobble drive frame and hinged support frame are separately positioned on pedestal both ends, the screen drum for rolling sieve nest and including shaft and being fixed on shaft excircle, described shaft one end is connect with wobble drive frame, the other end is connect with hinged support frame, the rotary drive motor and the other end of shaft connect, the funnel is fixed on the base and below screen drum, the belt conveyor is fixed on the base and below funnel, the chute feeder is removably disposed on pedestal and above wobble drive frame；The structure design of the utility model is reasonable, using wobble drive frame and hinged support frame and the connection for rolling sieve nest, realizes and rolls swinging up and down for sieve nest, more preferably screening effect is can get in carrying out flyash screening process, can promote the raising of screening efficiency.
Description
Technical field
The utility model is related to flyash processing technique fields, and in particular to a kind of flyash drum screen.
Background technology
In the process of flyash, need to screen flyash；Rolling can be used in actual process
Shaft screen is screened, and existing rotary screen is in structure design：Screen drum angle of inclination is fixed, and screen drum length is fixed；The original of screening
Reason is that rotary drive motor drives shaft rotation, shaft to drive screen drum rotation, and flyash slides downwards along screen drum, satisfactory
Flyash is fallen through the sieve pore on screen drum, and undesirable flyash is discharged in screen drum lower end；In process of manufacture, powder
The supply amount of coal ash increases, and the flyash gathered in screen drum can be made to be unable to get effective screening, screening effect is bad, if subtracted
The supply amount of small flyash can then influence production efficiency.Therefore, it is necessary to be improved to the prior art.
Utility model content
The purpose of this utility model is to be directed to the deficiencies in the prior art, provides a kind of reasonable in design, use
It is convenient, the flyash drum screen of flyash screening efficiency and screening effect can be improved.
The technical solution adopted in the utility model is to achieve the above object：
A kind of flyash drum screen, including pedestal, rolling sieve nest, rotary drive motor, funnel, belt conveyor and feeding
Slot further includes wobble drive frame and hinged support frame, and the wobble drive frame and hinged support frame are separately positioned on pedestal both ends,
The sieve nest that rolls includes shaft and the screen drum that is fixed on shaft excircle, described shaft one end connect with wobble drive frame,
The other end is connect with hinged support frame, and the other end connection of the rotary drive motor and shaft, the funnel is fixed on pedestal
Above and below screen drum, the belt conveyor is fixed on the base and below funnel, the chute feeder is removably
It is set on the base and above wobble drive frame；
Further, the wobble drive frame includes lifting support column, elevation and subsidence regulating device and oscillatory gearing mechanism, two institutes
It states lifting support column to be disposed in parallel on pedestal, track groove, the elevation and subsidence regulating device setting is provided on lifting support column
Between the track groove for lifting support column at two, the oscillatory gearing mechanism is arranged on elevation and subsidence regulating device；
Further, the elevation and subsidence regulating device includes slide holder and hydraulic jack, and the two of the slide holder
End is adapted with track groove, and the top of the hydraulic jack is connect with slide holder, bottom end is fixedly connected with pedestal；
Further, the oscillatory gearing mechanism includes first bearing seat, servo-actuated support plate, gripper rail plate, wobble drive
Motor and eccentric wheel, the first bearing seat are connect with shaft one end, and the servo-actuated support plate is fixed at first bearing seat
Lower section, two blocks of gripper rail plates are disposed in parallel on slide holder, and the wobble drive motor is fixed on sliding support
On frame, the eccentric wheel is located between two blocks of gripper rail plates, and the output shaft end of the wobble drive motor passes through a clamping rail
It is connect with eccentric wheel after guidance tape, the servo-actuated support plate is clamped between two blocks of gripper rail plates and its lower face is matched with eccentric wheel
It closes；
Further, the lower face of the servo-actuated support plate is arc-shaped；
Further, the hinged support frame includes fixed support column, crossbeam, support otic placode, hinged otic placode, axis pin and second
Bearing block, two fixed support columns are disposed in parallel on pedestal, the crossbeam be fixedly connected on two fixed support columns it
Between, two pieces of support otic placodes are disposed in parallel on crossbeam, between hinged otic placode is hinged on two pieces of support otic placodes by axis pin, described the
Two bearing bracket lower end is fixedly connected with hinged otic placode, and second bearing seat is connect with the shaft other end, and rotary drive motor is fixed on
In second bearing seat；
Further, the funnel is equipped with the lateral discharging chute communicated with outside it, and the lateral discharging chute is located at
The lower section at screen drum one end edge, screen drum one end edge are adjacent to hinged support frame.
The utility model has the beneficial effects that：
The utility model is by being arranged wobble drive frame and hinged support frame so that work of the rolling sieve nest in wobble drive frame
It can be swung up and down with respect to hinged support frame under, at the same time rotary drive motor, which drives, rolls sieve nest rotation, in this way, flyash
Also suffered from inside drum screen body roll sieve nest swing up and down generated active force, enhance flyash with roll sieve nest it
Between effect, it can be achieved that flyash quick, high frequency zone, it can be ensured that screening effect, be conducive to promote screening efficiency height-regulating.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the positive structure diagram of the utility model；
Fig. 3 is the left view structural representation of Fig. 2；
Fig. 4 is the right side structural representation of Fig. 2.
Wherein：1- pedestals；2- rolls sieve nest；3- rotary drive motors；4- funnels；5- belt conveyors；6- chute feeders；7-
Wobble drive frame；8- hinged support framves；9- shafts；10- screen drums；11- lifts support column；12- elevation and subsidence regulating devices；13- is swung
Driving device；14- track grooves；15- slide holders；16- hydraulic jacks；17- first bearing seats；18- is servo-actuated support plate；
19- gripper rail plates；20- wobble drive motors；21- eccentric wheels；22- fixes support column；23- crossbeams；24- supports otic placode；25-
Hinged otic placode；26- axis pins；27- second bearing seats；The lateral discharging chutes of 28-.
Specific implementation mode
The preferred embodiment in the utility model is illustrated below in conjunction with attached drawing：
As shown in Figures 1 to 4, a kind of flyash drum screen, including pedestal 1, rolling sieve nest 2, rotary drive motor 3, funnel
4, belt conveyor 5 and chute feeder 6 further include wobble drive frame 7 and hinged support frame 8, the wobble drive frame 7 and hingedly branch
Support 8 is separately positioned on 1 both ends of pedestal, and the sieve nest 2 that rolls includes shaft 9 and the screen drum 10 being fixed on 9 excircle of shaft,
9 one end of the shaft connect with wobble drive frame 7, the connection of the other end and hinged support frame 8, the rotary drive motor 3 with turn
The other end of axis 9 connects, and the funnel 4 is fixed on pedestal 1 and positioned at 10 lower section of screen drum, and the belt conveyor 5 is fixed on
1 and positioned at the lower section of funnel 4 on pedestal, the chute feeder 6 is removably disposed on pedestal 1 and positioned at 7 top of wobble drive frame.
Pedestal 1 is in tabular or is in four frame shapes, is in four frame shapes to save material preferably, side may be selected on material
Steel or I-steel；Hinged support frame 8 is used to support shaft 9, and swinging up and down for shaft 9 may be implemented；Wobble drive frame 7 is for branch
Support shaft 9, and can drive shaft 9 swing up and down；Chute feeder 6 can have the function of that upper-lower height adjusting, specific setting can lead to
It crosses adjustable legs and adjusts height, and dismountable connection is realized using bolt and nut and pedestal 1.
Wobble drive frame 7 includes lifting support column 11, elevation and subsidence regulating device 12 and oscillatory gearing mechanism 13, two liters
Descending branch dagger 11 is disposed in parallel on pedestal 1, and track groove 14, the elevation and subsidence regulating device 12 are provided on lifting support column 11
It is arranged between the track groove 14 for lifting support column 11 at two, the oscillatory gearing mechanism 13 is arranged in elevation and subsidence regulating device 12
On；
Lifting support column 11 provides guiding using the track that its track groove 14 is that elevation and subsidence regulating device 12 provides lift adjustment
Effect；Elevation and subsidence regulating device 12 is used to adjust the upper-lower height of oscillatory gearing mechanism 13, this highly decides the inclination angle of shaft 9
Degree；Oscillatory gearing mechanism 13 is that shaft 9 is driven to realize the device swung up and down.
Elevation and subsidence regulating device 12 include slide holder 15 and hydraulic jack 16, the both ends of the slide holder 15 with
Track groove 14 is adapted, and the top of the hydraulic jack 16 is connect with slide holder 15, bottom end is fixedly connected with pedestal 1；
The hydraulic jack adjusted manually can be used in practical application for hydraulic jack 16；It can be made by the adjusting of hydraulic jack 16
Slide holder 15 is moved up and down along track groove 14.
Oscillatory gearing mechanism 13 includes first bearing seat 17, servo-actuated support plate 18, gripper rail plate 19, wobble drive motor
20 and eccentric wheel 21, the first bearing seat 17 connect with 9 one end of shaft, the servo-actuated support plate 18 is fixed at first axle
17 lower section of bearing, two blocks of gripper rail plates 19 are disposed in parallel on slide holder 15, and the wobble drive motor 20 is solid
It is scheduled on slide holder 15, the eccentric wheel 21 is located between two blocks of gripper rail plates 19, the wobble drive motor 20
Output shaft end is connect after passing through a gripper rail plate 19 with eccentric wheel 21, and the servo-actuated support plate 18 is clamped in two pieces of gripper rails
Between plate 19 and its lower face coordinates with eccentric wheel 21.
First bearing seat 17 is connect with 9 one end of shaft by bearing, and shaft 9 can realize rotation in first bearing seat 17,
Simultaneously also by first bearing seat 17 in axial fixed function；Servo-actuated support plate 18 be clamped in two blocks of gripper rail plates 19 it
Between, it can be achieved that first bearing seat 17 limit, avoid first bearing seat 17 from being rotated synchronously with shaft 9, and make first bearing
Seat 17 has the track moved up and down；Wobble drive motor 20 can realize eccentric rotary in rotation with movable eccentric wheel 21, eccentric
Wheel 21 can act in servo-actuated support plate 18, and swinging up and down for first bearing seat 17 can be achieved in this way, to can also realize shaft 9
Swing up and down.
The lower face of servo-actuated support plate 18 is arc-shaped；Contact area can be increased, avoid eccentric wheel 21 and servo-actuated support plate 18
Acting surface excessive wear；Servo-actuated support plate 18 and the cooperation of eccentric wheel 21 are a kind of separable structures, are convenient for the maintenance of equipment
It safeguards；
Hinged support frame 8 includes fixed support column 22, crossbeam 23, support otic placode 24, hinged otic placode 25, axis pin 26 and second
Bearing block 27, two fixed support columns 22 are disposed in parallel on pedestal 1, and the crossbeam 23 is fixedly connected on two fixed branch
Between dagger 22, two pieces of support otic placodes 24 are disposed in parallel on crossbeam 23, and hinged otic placode 25 is hinged on two pieces of branch by axis pin 26
Between supportting otic placode 24,27 lower end of the second bearing seat is fixedly connected with hinged otic placode 24, and second bearing seat 27 and shaft 9 are another
End connection, rotary drive motor 3 are fixed in second bearing seat 27.
Second bearing seat 27 can realize that rotationally and axially fixing for shaft 9, rotary drive motor 3 are fixed on second bearing seat
, it can be achieved that 3 drive shaft 9 of rotary drive motor rotates on 27, support otic placode 24 and hinged otic placode 25 are hinged by axis pin 26, can
So that shaft 9 has the function of swinging up and down.
Funnel 4 is equipped with the lateral discharging chute 28 communicated with outside it, and the lateral discharging chute 28 is located at screen drum 10
The lower section at one end edge, 10 one end edge of screen drum are adjacent to hinged support frame 8；In this way, the flyash for not meeting screening requirement can
It is dropped down onto on lateral discharging chute 28 through 10 end of screen drum export cocurrent, lateral discharging chute 28 has certain angle of inclination, powder
Coal ash can skid off outside funnel 4.
The operation principle and process of the utility model：
When carrying out flyash screening conveying equipment can be arranged for flyash in 6 one end of chute feeder in the utility model
Lasting addition, leads through chute feeder 6 back into screen drum 10, screen drum 10 is higher than the other end adjacent to one end of chute feeder 6；Rotation
Driving motor 3 drives shaft 9 to be rotated in first bearing seat 17 and second bearing seat 27, and shaft 9 drives screen drum 10 to rotate, with this
Meanwhile wobble drive motor 20 is rotated with movable eccentric wheel 21, eccentric wheel 21 is applied in servo-actuated support plate 18, makes servo-actuated support plate
18 move up and down between two gripper rail plates 19, and then first bearing seat 17 is made to move up and down, to make shaft 9 with respect to axis pin
26 axle center, which is realized, swings up and down effect；Flyash is cut in screen drum 10 by gravity, opposite 10 inner peripheral surface of screen drum
Swing effect to effect and above and below 26 axle center of axis pin so that flyash is reinforced with the contact of screen drum 10, colliding forces,
And then make the screening effect of flyash more preferably, when 10 length of screen drum is fixed, 10 inside of screen drum, which screens flyash amount, to be increased
Add, this improves the working efficiency of screening；The flyash for meeting screening granularity requirements is wandered through screen drum 10 into funnel 4, funnel 4
To the part, flyash converges, and is allowed to wander onto belt conveyor 5, and subsequent processing is being delivered to through belt conveyor 5；
The flyash for not meeting screening granularity requirements slides along 10 inner wall of screen drum to lateral discharging chute 28, in lateral discharging chute 28
Under the action of dredge to outside.
For the tilt adjustable of screen drum 10, this is conducive to the height for adjusting chute feeder 6, preferably adapts to the utility model
The height for the feed device being connected with chute feeder 6；There is the efficiency of screening process at the inclination angle of screen drum 10 certain simultaneously
It influences, flyash stress is had an impact, when 10 angle of inclination of screen drum is larger, flyash is from 10 height of screen drum to low side
Stroke used in the time compared to 10 relatively low angle of inclination of screen drum when can shorten；It can be required according to supply and demand in practical application flexible
The angle of inclination of setting screen drum 10, optional 10 ° ~ 45 ° of the angle of inclination, preferably 12 ° ~ 30 °, since the utility model increases powder
Coal ash passes through active force when screen drum 10, and flyash and the effect of screen drum 10 is made to reinforce, therefore screen drum 10 can suitably be turned up and incline
Rake angle 25 ° or 30 ° may be selected in practical application, to obtain higher screening efficiency；It can pass through when carrying out specifically adjusting
The height for adjusting hydraulic jack 16 realizes the lift adjustment of slide holder 15, and then realizes the high low-key of first bearing seat 17
Section, so as to be to realize that the angle of inclination of screen drum 10 is adjusted.
Finally it should be noted that：The foregoing is merely the preferred embodiments of utility model, are not limited to practicality
It is novel, although utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art,
Still can be with technical scheme described in the above embodiments is modified, or which part technical characteristic is equal
It replaces.For all spirit in utility model within principle, any modification, equivalent replacement, improvement and so on should be included in reality
Within novel protection domain.
Claims (7)
1. a kind of flyash drum screen, including pedestal (1), rolling sieve nest (2), rotary drive motor (3), funnel (4), belt are defeated
Send machine (5) and chute feeder (6), it is characterised in that：Further include wobble drive frame (7) and hinged support frame (8), the wobble drive
Frame (7) and hinged support frame (8) are separately positioned on pedestal (1) both ends, and the rolling sieve nest (2) includes shaft (9) and is fixed on
Screen drum (10) on shaft (9) excircle, described shaft (9) one end connect with wobble drive frame (7), the other end and hinged support
Frame (8) connects, and the rotary drive motor (3) connect with the other end of shaft (9), and the funnel (4) is fixed on pedestal (1)
And below screen drum (10), the belt conveyor (5) is fixed on pedestal (1) and below funnel (4), the feeding
Slot (6) is removably disposed on pedestal (1) and above wobble drive frame (7).
2. a kind of flyash drum screen as described in claim 1, it is characterised in that：The wobble drive frame (7) includes lifting
Support column (11), elevation and subsidence regulating device (12) and oscillatory gearing mechanism (13), two lifting support columns (11) are set up in parallel
On pedestal (1), track groove (14) is provided on lifting support column (11), the elevation and subsidence regulating device (12) is arranged at two
Between the track groove (14) for lifting support column (11), the oscillatory gearing mechanism (13) is arranged on elevation and subsidence regulating device (12).
3. a kind of flyash drum screen as claimed in claim 2, it is characterised in that：The elevation and subsidence regulating device (12) includes sliding
Dynamic supporting rack (15) and hydraulic jack (16), the both ends of the slide holder (15) are adapted with track groove (14), described
The top of hydraulic jack (16) is connect with slide holder (15), bottom end is fixedly connected with pedestal (1).
4. a kind of flyash drum screen as claimed in claim 3, it is characterised in that：The oscillatory gearing mechanism (13) includes the
One bearing block (17), servo-actuated support plate (18), gripper rail plate (19), wobble drive motor (20) and eccentric wheel (21), it is described
First bearing seat (17) is connect with shaft (9) one end, and the servo-actuated support plate (18) is fixed under first bearing seat (17)
Side, two pieces of gripper rail plates (19) are disposed in parallel on slide holder (15), and the wobble drive motor (20) is fixed
On slide holder (15), the eccentric wheel (21) is located between two pieces of gripper rail plates (19), the wobble drive motor
(20) output shaft end is connect with eccentric wheel (21) afterwards across a gripper rail plate (19), and the servo-actuated support plate (18) is clamped in
Between two pieces of gripper rail plates (19) and its lower face coordinates with eccentric wheel (21).
5. a kind of flyash drum screen as claimed in claim 4, it is characterised in that：The lower face of the servo-actuated support plate (18)
It is arc-shaped.
6. a kind of flyash drum screen as described in claim 1, it is characterised in that：The hinged support frame (8) includes fixing
Support column (22), crossbeam (23), support otic placode (24), hinged otic placode (25), axis pin (26) and second bearing seat (27), two institutes
It states fixed support column (22) to be disposed in parallel on pedestal (1), the crossbeam (23) is fixedly connected on two fixed support columns (22)
Between, two pieces of support otic placodes (24) are disposed in parallel on crossbeam (23), and hinged otic placode (25) is hinged on two pieces by axis pin (26)
Between supporting otic placode (24), second bearing seat (27) lower end is fixedly connected with hinged otic placode (25), second bearing seat (27)
It is connect with shaft (9) other end, rotary drive motor (3) is fixed in second bearing seat (27).
7. a kind of flyash drum screen as described in claim 1, it is characterised in that：The funnel (4) be equipped with outside it
The lateral discharging chute (28) communicated, the lateral discharging chute (28) are located at the lower section at screen drum (10) one end edge, the screen drum
(10) one end edge is adjacent to hinged support frame (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720758331.0U CN207756459U (en) | 2017-06-27 | 2017-06-27 | A kind of flyash drum screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720758331.0U CN207756459U (en) | 2017-06-27 | 2017-06-27 | A kind of flyash drum screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207756459U true CN207756459U (en) | 2018-08-24 |
Family
ID=63178226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720758331.0U Active CN207756459U (en) | 2017-06-27 | 2017-06-27 | A kind of flyash drum screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207756459U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107185798A (en) * | 2017-06-27 | 2017-09-22 | 甘肃天碁新型建材有限公司 | A kind of flyash drum screen |
| CN111375540A (en) * | 2020-04-11 | 2020-07-07 | 方小牛 | Sustainable coal briquette classification powder removing device based on coal mine production |
| CN116197109A (en) * | 2023-03-30 | 2023-06-02 | 枣庄矿业(集团)济宁岱庄煤业有限公司 | Graded screening device for coal mine |
-
2017
- 2017-06-27 CN CN201720758331.0U patent/CN207756459U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107185798A (en) * | 2017-06-27 | 2017-09-22 | 甘肃天碁新型建材有限公司 | A kind of flyash drum screen |
| CN111375540A (en) * | 2020-04-11 | 2020-07-07 | 方小牛 | Sustainable coal briquette classification powder removing device based on coal mine production |
| CN116197109A (en) * | 2023-03-30 | 2023-06-02 | 枣庄矿业(集团)济宁岱庄煤业有限公司 | Graded screening device for coal mine |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231101 Address after: 730913 No.1, Section C, Building 5, Shanghe Wall Street, Pingchuan District, Baiyin City, Gansu Province Patentee after: Gansu Jingtong Environmental Protection Group Co.,Ltd. Address before: 730913 Shuigouyan, Pingchuan District, Baiyin City, Gansu Province Patentee before: GANSU TIANQI NEW BUILDING MATERIALS CO.,LTD. |
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| TR01 | Transfer of patent right |