CN109201356A - Without pressure two sections of feeding inlet obstruction alarm devices of three-product HM cyclone and method - Google Patents
Without pressure two sections of feeding inlet obstruction alarm devices of three-product HM cyclone and method Download PDFInfo
- Publication number
- CN109201356A CN109201356A CN201810950966.XA CN201810950966A CN109201356A CN 109201356 A CN109201356 A CN 109201356A CN 201810950966 A CN201810950966 A CN 201810950966A CN 109201356 A CN109201356 A CN 109201356A
- Authority
- CN
- China
- Prior art keywords
- cyclone
- pressure
- sections
- product
- feeding inlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000000903 blocking effect Effects 0.000 claims abstract description 20
- 230000010355 oscillation Effects 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 20
- 239000000725 suspension Substances 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 239000003245 coal Substances 0.000 abstract description 25
- 238000001514 detection method Methods 0.000 abstract 1
- 230000035611 feeding Effects 0.000 description 22
- 238000013024 troubleshooting Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C11/00—Accessories, e.g. safety or control devices, not otherwise provided for, e.g. regulators, valves in inlet or overflow ducting
Landscapes
- Cyclones (AREA)
Abstract
The present invention relates to coal mines to acquire technical field, and in particular to it is a kind of without pressure two sections of feeding inlet obstruction alarm devices of three-product HM cyclone and method, the present invention can be produced with intellectualized detection in the pressure condition without pressure three-product HM cyclone.By installing a pressure sensor in one section of conjunction Jie's pipe feeding inlet of cyclone, for acquiring the operating pressure of cyclone, cooperate PLC programmable controller again, pass through program editing, can the two sections of feeding inlets blocking of automatic identification cyclone when pressure oscillation, when touching setting alarm pressure value, warning message will be popped up in the host computer operation interface of central station of floating dock, audio alert is issued in combination with voice system, remind staff, and it can also be automatically stopped to coal, accident impact is terminated with most fast speed, least coverage, there is very strong creativeness.
Description
Technical field
The present invention relates to coal mines to acquire technical field, and in particular to a kind of without pressure two sections of feeding inlets of three-product HM cyclone
Obstruction alarm device and method.
Background technique
Two sections of pan feedings of cyclone often are blocked along with bulk spoil in coal washery without pressure three-product HM cyclone production
The case where mouth, and find that two sections of cyclone are substantially the reduction or cleaned coal amount that cash sculping screen material in discovery is removed by collection control personnel
Increase suddenly, cyclone pressure increases etc. identifies two sections of cyclone blockings.By traditional artificial identification, probably due to collection control
Personnel carelessness, discovery not in time, cause find cyclone blockage when had already appeared serious negative consequence, such as a large amount of raw coal into
Enter cleaned coal, causes quality of cleaned coal unqualified;Or raw coal enters cleaned coal, it is excessive coal amount occur, and cleaned coal centrifuge overload is caused to suppress
Extremely;Furthermore there is cleaned coal belt overload, occur killing the negative consequences such as cleaned coal belt.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides a kind of without the two sections of feeding inlet blocking alarms of pressure three-product HM cyclone
Device and method, present invention greatly reduces the amounts that raw coal enters cleaned coal, ensure that product quality, reduce secondary accident, mention
High troubleshooting efficiency reduces failure influence time.
(2) technical solution
In order to achieve the above object, the present invention is achieved by the following technical programs:
It is a kind of to block alarm methods without two sections of feeding inlets of pressure three-product HM cyclone, it is characterised in that: the method includes with
Lower step:
S1 adjusts conjunction Jie's pump motor running frequency and conjunction medium suspension liquid density in normally producing, and stablizes after a certain period of time, writes down this
When motor operation frequency f1, cyclone operating pressure P1, density of suspending liquid ρ 1;
Pressure when two sections of feeding inlet blockings of cyclone is write down at S1 under motor operation frequency and occurred near density in S2 production
P2 value chooses a minimum, when calculating blocking with P2-P1 with difference P3 during normal production;
S3 obtains alarming value P when two sections of feeding inlet blockings of cyclone, the calculation formula of the P are as follows: P=P3+P1* (f/ according to S2
f1)2 *(ρ/ρ1);
In formula, P is the alarm pressure value generated after calculating;The value that P1, P3, f1, ρ 1 writes down when being above-mentioned nominal data, P3 is can
Adjust variable;F, ρ is real time motor running frequency and conjunction medium suspension liquid density in normal production.
Preferably, conjunction medium suspension liquid density described in the S1 is normal washing density;Jie's pump motor fortune is closed adjusting
Line frequency and close medium suspension liquid density after, make the operating pressure of cyclone be stable at cyclone rated operating pressure range it
It is interior.
Preferably, in the S2, P3 can be optimized again in use.
Preferably, in the S3, motor operation frequency and conjunction medium suspension liquid density input have corresponding data address.
It is a kind of without pressure two sections of feeding inlet obstruction alarm devices of three-product HM cyclone, characteristic is: passing including pressure
Sensor, field device, PLC programmable logic controller (PLC), host computer, voice system and audio alert, the pressure sensor show
Field device and host computer pass through signal wire and are electrical connected with the PLC programmable logic controller (PLC), the audio alert and institute
Predicate system for electrical teaching is electrical connected, and the voice system is electrical connected by signal wire and the host computer.
Preferably, the pressure sensor is arranged in one section of conjunction Jie's pipe feeding inlet of cyclone, for acquiring cyclone
Operating pressure.
Preferably, the PLC programmable controller cooperation pressure sensor can automatic identification eddy flow by program editing
Pressure oscillation when two sections of feeding inlet blockings of device.
Preferably, when pressure touches setting alarm pressure value, PLC programmable controller controls the host computer operation of central station of floating dock
Warning message is popped up at interface, issues audio alert in combination with voice system.
(3) beneficial effect
The present invention, can be in different motor operation frequencies and under closing medium suspension liquid density, effectively to rotation since coming into operation
Stream device operating pressure is monitored in real time.When two sections of feeding inlet blockings of cyclone occur, alarm can be timely issued, and automatic
Stop to coal, having prevented collection control personnel may cannot find that two sections of cyclone are blocked up due to seeing that the collection control interface time has been grown and neglected
The case where plug, reduces the amount that raw coal enters cleaned coal, ensure that product quality, reduces secondary accident, improve troubleshooting efficiency,
Failure influence time is reduced, automation, intelligence are realized.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of functional block diagram without two sections of feeding inlet blocking alarm methods of pressure three-product HM cyclone;
Fig. 2 is a kind of structure chart without pressure two sections of feeding inlet obstruction alarm devices of three-product HM cyclone;
Fig. 3 is parameter setting interface figure of the invention;
Fig. 4 is cyclone operating pressure curve graph;
Wherein the label in Fig. 2 respectively represents:
1, host computer;2, field device;3, PLC programmable logic controller (PLC);4, voice system;5, audio alert;6, pressure passes
Sensor.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Embodiment 1:
It is as shown in Figure 1 it is a kind of block alarm methods without pressure two sections of feeding inlets of three-product HM cyclone, the method includes with
Lower step:
S1 adjusts conjunction Jie's pump motor running frequency and conjunction medium suspension liquid density in normally producing, and stablizes after a certain period of time, writes down this
When motor operation frequency f1, cyclone operating pressure P1, density of suspending liquid ρ 1;
Pressure when two sections of feeding inlet blockings of cyclone is write down at S1 under motor operation frequency and occurred near density in S2 production
P2 value chooses a minimum, when calculating blocking with P2-P1 with difference P3 during normal production;
S3 obtains alarming value P when two sections of feeding inlet blockings of cyclone, the calculation formula of the P are as follows: P=P3+P1* (f/ according to S2
f1)2 *(ρ/ρ1);
In formula, P is the alarm pressure value generated after calculating;The value that P1, P3, f1, ρ 1 writes down when being above-mentioned nominal data, P3 is can
Adjust variable;F, ρ is real time motor running frequency and conjunction medium suspension liquid density in normal production.
Conjunction medium suspension liquid density described in S1 is normal washing density;It is situated between adjusting to close Jie's pump motor running frequency and close
After density of suspending liquid, it is stable at the operating pressure of cyclone within cyclone rated operating pressure range.
In S2, P3 can be optimized again in use.
In S3, motor operation frequency and conjunction medium suspension liquid density input have corresponding data address specifically as shown in Figure 3
Parameter setting interface figure, wherein d09, d10 are supplemental characteristic addresses.
The above method, which has prevented collection control personnel, cannot find eddy flow due to seeing that the collection control interface time has been grown and neglected
The case where two sections of blockings of device.
Embodiment 2:
As shown in Figure 2 is a kind of without pressure two sections of feeding inlet obstruction alarm devices of three-product HM cyclone, including pressure sensor
6, field device 2, PLC programmable logic controller (PLC) 3, host computer 1, voice system 4 and audio alert 5, the pressure sensor
6, field device 2 and host computer 1 are electrical connected by signal wire with the PLC programmable logic controller (PLC) 3, the voice reporting
Alert 5 are electrical connected with the voice system 4, and the voice system 4 is electrical connected by signal wire with the host computer 1.
Pressure sensor 6 is arranged in one section of conjunction Jie's pipe feeding inlet of cyclone, for acquiring the operating pressure of cyclone.
PLC programmable controller cooperates pressure sensor 6 can two sections of pan feedings of automatic identification cyclone by program editing
Pressure oscillation when mouth blocking.
When pressure touches setting alarm pressure value, PLC programmable controller controls the 1 operation interface bullet of host computer of central station of floating dock
Warning message out issues audio alert 5 in combination with voice system 4.
Pressure sensor 6 pressure limit 0-1.0MPa, supply voltage 24VDC, output signal 4-20mA are installed on cyclone
One section of conjunction Jie's pipeline feeding inlet;The 4-20mA analog signal that pressure sensor 6 exports is connected to PLC Analog input mModule (this
Device use Siemens S7-300 PLC, Analog input mModule be 6ES7 331-7KF02-0AB0, PLC program and on
Position 1 operation interface program of machine carries out configuration editor according to scene, realizes and monitors in real time to live cyclone operating pressure), pass through
Program editing generates cyclone real-time working pressure curve;Then each calibration ginseng is inputted by the input frame in operation interface again
Number generates alarm pressure curve;When two sections of feeding inlets of cyclone block, alarming value will be touched and automatically pop up warning
Language and phonetic warning and stopping are to coal.
Filament as shown in Figure 4 represents real-time working pressure, is 6 real time data of pressure sensor;Thick line represents alarm pressure,
Its 2 * (ρ/ρ 1) of P=P3+P1* (f/f1)=2 * (d09/1420) of 0.02+0.179* (d10/42) is about sent out in 20:30:30
Raw two sections of stopping states of cyclone, in 20:30:48, just shutdown is handled, and reaction treatment speed is very fast.
The present invention, can be in different motor operation frequencies and under closing medium suspension liquid density, effectively since coming into operation
Cyclone operating pressure is monitored in real time.When two sections of feeding inlet blockings of cyclone occur, alarm can be timely issued, and
It is automatically stopped to coal, cyclone two may cannot be found due to seeing that the collection control interface time has been grown and neglected by having prevented collection control personnel
The case where section blocking, to reach following benefit:
1, the amount that raw coal enters cleaned coal is greatly reduced, ensure that product quality;
2, secondary accident is reduced, such as kills cleaned coal belt, kill cleaned coal centrifuge;
3, it improves troubleshooting efficiency, reduce failure influence time;
4, automation, intelligence are realized.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations;Although with reference to the foregoing embodiments
Invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features;And these modification or
Replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (8)
1. a kind of block alarm method without pressure two sections of feeding inlets of three-product HM cyclone, it is characterised in that: the method includes
Following steps:
S1 adjusts conjunction Jie's pump motor running frequency and conjunction medium suspension liquid density in normally producing, and stablizes after a certain period of time, writes down this
When motor operation frequency f1, cyclone operating pressure P1, density of suspending liquid ρ 1;
Pressure when two sections of feeding inlet blockings of cyclone is write down at S1 under motor operation frequency and occurred near density in S2 production
P2 value chooses a minimum, when calculating blocking with P2-P1 with difference P3 during normal production;
S3 obtains alarming value P when two sections of feeding inlet blockings of cyclone, the calculation formula of the P are as follows: P=P3+P1* (f/ according to S2
f1)2 *(ρ/ρ1);
In formula, P is the alarm pressure value generated after calculating;The value that P1, P3, f1, ρ 1 writes down when being above-mentioned nominal data, P3 is can
Adjust variable;F, ρ is real time motor running frequency and conjunction medium suspension liquid density in normal production.
2. according to claim 1 block alarm method without pressure two sections of feeding inlets of three-product HM cyclone, feature exists
In: conjunction medium suspension liquid density described in the S1 is normal washing density;It is situated between adjusting to close Jie's pump motor running frequency and close
After density of suspending liquid, it is stable at the operating pressure of cyclone within cyclone rated operating pressure range.
3. according to claim 1 block alarm method without pressure two sections of feeding inlets of three-product HM cyclone, feature exists
In: in the S2, P3 can be optimized again in use.
4. according to claim 1 block alarm method without pressure two sections of feeding inlets of three-product HM cyclone, feature exists
In: in the S3, motor operation frequency and conjunction medium suspension liquid density input have corresponding data address.
5. a kind of without pressure two sections of feeding inlet obstruction alarm devices of three-product HM cyclone, characteristic is: including pressure sensing
Device, field device, PLC programmable logic controller (PLC), host computer, voice system and audio alert, the pressure sensor, scene
Equipment and host computer pass through signal wire and are electrical connected with the PLC programmable logic controller (PLC), the audio alert with it is described
Voice system is electrical connected, and the voice system is electrical connected by signal wire and the host computer.
6. according to claim 5 without pressure two sections of feeding inlet obstruction alarm devices of three-product HM cyclone, characteristic exists
In: the pressure sensor is arranged in one section of conjunction Jie's pipe feeding inlet of cyclone, for acquiring the operating pressure of cyclone.
7. according to claim 5 without pressure two sections of feeding inlet obstruction alarm devices of three-product HM cyclone, characteristic exists
In: the PLC programmable controller cooperation pressure sensor can two sections of feeding inlets of automatic identification cyclone by program editing
Pressure oscillation when blocking.
8. according to claim 7 without pressure two sections of feeding inlet obstruction alarm devices of three-product HM cyclone, characteristic exists
In: when pressure touches setting alarm pressure value, the host computer operation interface that PLC programmable controller controls central station of floating dock pops up alarm
Information issues audio alert in combination with voice system.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201810950966.XA CN109201356B (en) | 2018-08-21 | 2018-08-21 | Device and method for warning blockage of two-section feed inlet of pressureless three-product heavy-medium cyclone |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201810950966.XA CN109201356B (en) | 2018-08-21 | 2018-08-21 | Device and method for warning blockage of two-section feed inlet of pressureless three-product heavy-medium cyclone |
Publications (2)
Publication Number | Publication Date |
---|---|
CN109201356A true CN109201356A (en) | 2019-01-15 |
CN109201356B CN109201356B (en) | 2024-09-10 |
Family
ID=64989493
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201810950966.XA Active CN109201356B (en) | 2018-08-21 | 2018-08-21 | Device and method for warning blockage of two-section feed inlet of pressureless three-product heavy-medium cyclone |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN109201356B (en) |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06320056A (en) * | 1993-05-07 | 1994-11-22 | Onoda Cement Co Ltd | Alarm system for cyclone clogging |
CN102261930A (en) * | 2010-08-24 | 2011-11-30 | 鞍钢集团矿业公司 | Method for indirectly detecting cyclone blockage |
US20140039374A1 (en) * | 2012-08-03 | 2014-02-06 | Cesario P. Dos Santos | Clog Detection in a Flow Control System |
CN204841990U (en) * | 2015-07-21 | 2015-12-09 | 贵州水城矿业股份有限公司二塘选煤厂 | Three products of non -pressure feed heavily are situated between swirler and stop up alarm device |
CN204962307U (en) * | 2015-07-23 | 2016-01-13 | 昆明理工大学 | Early warning of ore pulp pipe blockage and positioner |
CN206935589U (en) * | 2017-05-04 | 2018-01-30 | 佛山市泰杨自动化机械有限公司 | A kind of cyclone separator improved structure |
CN207065095U (en) * | 2017-07-18 | 2018-03-02 | 一汽-大众汽车有限公司 | A kind of anti-overflow pipeline of automatic detection alarm |
CN208878828U (en) * | 2018-08-21 | 2019-05-21 | 山东济宁运河煤矿有限责任公司 | Without pressure two sections of feeding inlet obstruction alarm devices of three-product HM cyclone |
-
2018
- 2018-08-21 CN CN201810950966.XA patent/CN109201356B/en active Active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06320056A (en) * | 1993-05-07 | 1994-11-22 | Onoda Cement Co Ltd | Alarm system for cyclone clogging |
CN102261930A (en) * | 2010-08-24 | 2011-11-30 | 鞍钢集团矿业公司 | Method for indirectly detecting cyclone blockage |
US20140039374A1 (en) * | 2012-08-03 | 2014-02-06 | Cesario P. Dos Santos | Clog Detection in a Flow Control System |
CN204841990U (en) * | 2015-07-21 | 2015-12-09 | 贵州水城矿业股份有限公司二塘选煤厂 | Three products of non -pressure feed heavily are situated between swirler and stop up alarm device |
CN204962307U (en) * | 2015-07-23 | 2016-01-13 | 昆明理工大学 | Early warning of ore pulp pipe blockage and positioner |
CN206935589U (en) * | 2017-05-04 | 2018-01-30 | 佛山市泰杨自动化机械有限公司 | A kind of cyclone separator improved structure |
CN207065095U (en) * | 2017-07-18 | 2018-03-02 | 一汽-大众汽车有限公司 | A kind of anti-overflow pipeline of automatic detection alarm |
CN208878828U (en) * | 2018-08-21 | 2019-05-21 | 山东济宁运河煤矿有限责任公司 | Without pressure two sections of feeding inlet obstruction alarm devices of three-product HM cyclone |
Also Published As
Publication number | Publication date |
---|---|
CN109201356B (en) | 2024-09-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10489263B2 (en) | Method for operating a container treatment system with fault diagnosis | |
WO2019052415A1 (en) | Intelligent cloud platform for managing industrial flue gas and dust, and control method therefor | |
JP2022551860A (en) | Dynamic monitoring and protection of factory processes, equipment and automation systems | |
CN208878828U (en) | Without pressure two sections of feeding inlet obstruction alarm devices of three-product HM cyclone | |
CN208288228U (en) | A kind of dense-medium separation control system | |
CN104090951A (en) | Abnormal data processing method | |
CN109201356A (en) | Without pressure two sections of feeding inlet obstruction alarm devices of three-product HM cyclone and method | |
WO2013048804A2 (en) | Pressure transmitter with diagnostics | |
CN207374814U (en) | Packagine machine export cigarette strip lacks a packet detection device | |
TWI657853B (en) | Exhaust system, device and method for preventing dust particles from flowing back | |
CN210557976U (en) | Positive pressure conveying system | |
CN207347523U (en) | A kind of clinker water stablizes transport control system | |
CN211070919U (en) | Metal separator for plastic granules | |
CN109557855A (en) | A kind of Intelligent internet of things fume purifying monitoring device of automatic control | |
CN113978793A (en) | Automatic cleaning device, method and production system for messy cigarettes in cigarette conveying channel | |
CN213911394U (en) | Wet granulation system | |
CN203807121U (en) | Bottle lacking detection device for bottle arranging disc of filling machine | |
CN108518576B (en) | Oil-break protection device and protection method for lubrication system of heavy-duty mechanical equipment | |
CN204544729U (en) | A kind of cement filter plant intelligence control system | |
CN215313045U (en) | Xinhui orange pulp micro-crushing full-automatic material output control device | |
CN106622703A (en) | Automatic alarm device for material blockage of three-product dense-medium cyclone | |
CN207394070U (en) | A kind of intelligent control adjusts valve | |
CN215898862U (en) | Cigarette detection device for cigarette output channel of cigarette making machine | |
CN109725608B (en) | Production line control system and control method for automatically detecting product state | |
CN212364873U (en) | Feed cooling effect monitoring system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
TA01 | Transfer of patent application right | ||
TA01 | Transfer of patent application right |
Effective date of registration: 20240809 Address after: 016000 Kabuqi, Haibowan District, Wuhai City, Inner Mongolia Autonomous Region Applicant after: Wuhai Tianyu Energy Co.,Ltd. Country or region after: China Address before: 272000 Nanzhang street, Rencheng District, Jining City, Shandong Province Applicant before: SHANDONG JINING CANAL COAL MINE Co.,Ltd. Country or region before: China |
|
GR01 | Patent grant | ||
GR01 | Patent grant |