CN200985353Y - Energy-saving environment-friendly intelligent crust breaking cylinder - Google Patents
Energy-saving environment-friendly intelligent crust breaking cylinder Download PDFInfo
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- CN200985353Y CN200985353Y CN 200620111428 CN200620111428U CN200985353Y CN 200985353 Y CN200985353 Y CN 200985353Y CN 200620111428 CN200620111428 CN 200620111428 CN 200620111428 U CN200620111428 U CN 200620111428U CN 200985353 Y CN200985353 Y CN 200985353Y
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Abstract
The utility model discloses a smart crust breaking cylinder which is energy-saving and environment friendly. The utility model comprises a cylinder body which comprises an upper cylinder head, a lower cylinder head and a bore which is divided into an upper cavity and a lower cavity by a piston which is connected with one end of a piston rod the other end of which protrudes the lower cylinder head. A change-over control valve is arranged at the cylinder body and equipped with a first output port communicated with the lower cavity by an air-flute and with a secondary output port communicated with the upper cavity. The utility model is characterized in that the cylinder body is equipped with a change-over control mechanism. The utility model has the advantages of convenient operation and long service life. The utility model can make a hammer return in time after an operation of crust breaking, protect the hammer from ablation and damage, prevent high heat in the electrolytic cell from transmitted to the crust breaking cylinder via the piston rod. In addition, the utility model can reflect the blanking case of the crust breaking cylinder in time and reduce the labor strength of operator.
Description
(1), technical field
The utility model relates to the parts on the electrolyzer in a kind of colored metallurgical industrial electrolytic aluminum equipment, particularly a kind of energy-conserving and environment-protective formula intelligence crust breaking cylinder.
(2), background technology
Existing crust breaking cylinder has generally comprised cylinder body, and cylinder body is made of upper cylinder cover, following cylinder cap, cylinder barrel etc., and piston is positioned at cylinder barrel, and cylinder barrel is separated into epicoele and cavity of resorption, and an end of piston rod is connected with piston, and the other end stretches out cylinder cap down; Cylinder body is provided with reversing control valve, and first output port of reversing control valve is communicated with epicoele, and second output port passed through the gas passage and is communicated with cavity of resorption.After tup is installed in the bottom of piston rod, can carry out the crust breaking blanking.The crust breaking cylinder of said structure is anti-fall to crust breaking blanking operation implementation self-timing control and air pressure, and it exists following deficiency:
1. tup will stay for some time in the high temperature aluminum water in electrolyzer after finishing crust breaking, wait for instructing and return.During this period of time, tup is subjected to the etch of high temperature aluminum water, has caused the ablation of tup to damage on the one hand, has also reduced the purity of aluminium on the other hand.
2. the high heat in the electrolyzer is delivered to cylinder body by tup, accelerated the aging of cylinder body inner seal, easily form the gas leakage noise, and pollute environment, not only increased crust breaking cylinder to the consumption of external air source and operator maintenance workload, also greatly reduced the work-ing life of crust breaking cylinder simultaneously equipment
3. when external air source stops air feed or crust breaking cylinder self suddenly gas leakage takes place, the anti-fall inefficacy of air pressure, tup will fall in the electrolyzer, be subjected to the etch of high temperature aluminum water always.
4. alarm free, indicating unit.When electrolyte crust is thicker in the lower or electrolyzer when external air source pressure, crust breaking cylinder can't drive tup and puncture electrolyte shell surface, and the blanking operation is still carried out by setup program, raw material is deposited on the electrolyte shell surface, not only influence electrolyzer thermal equilibrium, and when removing, flown upward loss greatly, not only cause second environmental pollution, and the aluminum oxide unit consumption is increased.The working condition of crust breaking cylinder is fully by electrolysis worker tours of inspection, and it is very inconvenient to operate, and has increased operator's labour intensity.
5. the pressure of the required work source of the gas of crust breaking cylinder is bigger, generally needs just can punch the electrolytic bath shell face more than 0.5MPa, and energy-output ratio is big.
(3), summary of the invention
The purpose of this utility model just provides a kind of easy and simple to handle, long service life, energy-saving type intelligence crust breaking cylinder that exhaust noise is little, and it can make tup in time return after finishing the crust breaking operation.
The purpose of this utility model is to realize by such technical scheme, it includes cylinder body, described cylinder body includes upper cylinder cover, following cylinder cap and cylinder barrel, the piston that is positioned at cylinder barrel is separated into cavity of resorption and epicoele with cylinder barrel, one end of piston rod is connected with piston, and the other end stretches out cylinder cap down; Cylinder body is provided with reversing control valve, and first output port of reversing control valve passed through the gas passage and is communicated with cavity of resorption, and second output port is communicated with epicoele, it is characterized in that: cylinder body is provided with commutation controlling mechanism.After tup is installed in the bottom of piston rod, commutation controlling mechanism on the described cylinder body is after tup is finished the crust breaking operation, can in time control the reversing control valve commutation, make external air source stop epicoele air feed to cylinder body, change into the cavity of resorption air feed, thereby promote piston piston rod drive tup is in time returned, shortened the time that tup stops greatly in electrolyzer.In addition, the cylinder diameter with crust breaking cylinder increases to 180mm by original 125mm.After cylinder diameter increased, the air pressure of punching the electrolytic bath shell face reduced by one times, and not only save the energy and reduced exhaust noise, and also the reduction of the speed of piston motion, the suffered surging force of cylinder body self is reduced, prolonged the work-ing life of cylinder body.
Owing to adopted technique scheme, the utlity model has easy and simple to handle, long service life, advantage that exhaust noise is low, it has:
1. tup can in time be received instruction and return after finishing crust breaking, avoids ablated damage, and does not influence the purity of aluminium.
2. the high heat in the electrolyzer is short by the time that tup transfers heat to cylinder body, and the less calories of transmission prevents that the high heat in the electrolyzer is delivered to crust breaking cylinder through piston rod, has prolonged the work-ing life of crust breaking cylinder.
3. when outside no source of the gas or crust breaking cylinder self generation gas leakage, tup can not fall in the electrolyzer, avoids tup and crust breaking cylinder to be damaged by the high temperature in the electrolyzer.
4. situation about report to the police, indicating unit reflecting the blanking of crust breaking cylinder crust breaking immediately fails to puncture ionogen at tup, stops blanking, has reduced operator's labour intensity.
(4), description of drawings
Description of drawings of the present utility model is as follows:
Fig. 1 is first kind of structural representation of the present utility model;
Fig. 2 is second kind of structural representation of the present utility model;
Fig. 3 is the third structural representation of the present utility model;
Among the figure: 1. upper cylinder cover; 2. descend cylinder cap; 3. cylinder barrel; 4. piston; 5. cavity of resorption; 6. epicoele; 7. piston rod; 8. reversing control valve; 9. cross the gas passage; 10. pneumatic stroke valve; 11. input port; 12. output port; 13. control air flue; 14. shake-up valve rod; 15. travel switch; 16. magnetic switch; 17. magnet; 18. pressure transmitter; 19. magnet; 20. sliding chamber; 21. latching ram; 22. sliding chamber, a left side; 23. right sliding chamber; 24. latch segment; 25. groove; 26. spring.
(5), embodiment
The utility model is described in further detail below in conjunction with drawings and Examples:
Shown in Fig. 1,2 or 3, the utility model includes cylinder body, and described cylinder body includes upper cylinder cover 1, following cylinder cap 2 and cylinder barrel 3, and the piston 4 that is positioned at cylinder barrel 3 is separated into cavity of resorption 5 and epicoele 6 with cylinder barrel 3, one end of piston rod 7 is connected with piston 4, and the other end stretches out cylinder cap 2 down; Cylinder body is provided with reversing control valve 8, and first output port of reversing control valve 8 passed through gas passage 9 and is communicated with cavity of resorption 5, and second output port is communicated with epicoele 6, and it is characterized in that: cylinder body is provided with commutation controlling mechanism.
As shown in Figure 1, reversing control valve 8 is gas control reversing control valves, commutation controlling mechanism is pneumatic stroke valve 10, pneumatic stroke valve 10 is arranged on down the bottom of cylinder cap 2, the input port 11 of pneumatic stroke valve 10 and output port 12 are communicated with uptake, the control port of gas control reversing control valve respectively by control air flue 13, have a shake-up valve rod 14 that is positioned at cavity of resorption 5 on the pneumatic stroke valve 10.As shown in Figure 1, gas control passage 13 is binary channel tracheaes, this binary channel tracheae was positioned at gas passage 9, one of them tracheae is communicated with the input port 11 of pneumatic stroke valve 10 with the uptake of gas control reversing control valve, another tracheae is communicated with the output port 12 of pneumatic stroke valve 10 with the control port of gas control reversing control valve.
Now in conjunction with Fig. 1, the principle of work of a kind of embodiment of the utility model is described: at first, external air source input high pressure gas, second control port through the gas control reversing control valve enters epicoele 6, it is descending to promote piston 4, it is descending to make piston rod 7 drive tup, and when piston 4 came downwards to the bottom of cylinder barrel 3, tup promptly entered and implements drilling operation in the electrolyzer.Meanwhile, piston 4 is depressed and is touched valve rod 14, the valve open of pneumatic stroke valve, high pressure gas in the gas control reversing control valve uptake are after a tracheae, the input port 11 of binary channel tracheae enter pneumatic stroke valve 10, again through another air flue of output port 12 and binary channel tracheae control end to the gas control reversing control valve, make the commutation of gas control reversing control valve, the reverse exhaust of first control port of gas control reversing control valve, second control port is opened, and the high pressure gas of external air source switch to immediately and input to cavity of resorption 5 by inputing to epicoele 6.The high pressure gas promotion piston 4 that flows into cavity of resorption 5 is up, and it is up that piston rod 7 promptly drives tup, makes tup in time leave electrolyzer.When piston 4 was back to cylinder barrel 3 tops, gas control commutation system valve was according to setting, keep cavity of resorption 5 air feed so that crust breaking cylinder is in waiting status, or commutation changed into to epicoele 6 air feed, makes crust breaking cylinder carry out crust breaking operation next time.So repeatedly, carry out in the whole process of crust breaking operation at tup, pneumatic stroke valve 10 control gas control reversing control valves in time commutate, and make tup in time leave electrolyzer, avoid tup and cylinder body to be damaged.
As shown in Figure 2, reversing control valve 8 is electromagnetic switch control valves, and commutation controlling mechanism is arranged on down the travel switch 15 on the cylinder cap 2, and the trip switch 15 is connected by the control end of lead with the electromagnetic switch control valve.In like manner, controlled by solenoid electric valve, external air source input high pressure gas are to epicoele 5, promotion piston 4 comes downwards to the bottom of cylinder barrel 3, piston rod 7 promptly drives the tup crust breaking, meanwhile, travel switch 15 is subjected to the extruding of piston 4, produces a piston 4 and is in electrical signal under this position, and be delivered to the electromagnetic switch control valve, the electromagnetic switch control valve commutates immediately, external air source stops epicoele 6 air feed, and transfers to by crossing gas passage 9 to cavity of resorption 5 air feed, and the high pressure gas promotion piston 4 that flow into cavity of resorption 5 is up, it is up that piston rod 7 promptly drives tup, makes tup in time leave electrolyzer.When piston 4 was back to cylinder barrel 3 tops, electromagnetic switch system valve was according to set keeping cavity of resorption 5 air feed so that crust breaking cylinder is in holding state, or commutation changes into to epicoele 6 air feed, makes crust breaking cylinder carry out crust breaking operation next time.
As shown in Figure 3, reversing control valve 8 is electromagnetic switch control valves, and commutation controlling mechanism is a magnetic switch 16, and magnetic switch 16 is arranged at cylinder barrel 3 bottoms, and be connected by the control end of lead with the electromagnetic switch control valve, piston 4 is provided with the magnet 17 that matches with magnetic switch 16.When piston rod 7 drove the descending crust breaking of tup, piston 4 was positioned at the bottom of cylinder barrel 3, and magnetic switch 16 is sensed the magnetic field of piston 4 upper magnets 17 and generated an electrical signal, is delivered to the control end of electromagnetic switch control valve, controls its commutation.It is the same that it makes the work process, will not repeat at this.
Cylinder body is provided with pressure transmitter 18, and described pressure transmitter 18 is connected to pilot lamp.Shown in Fig. 1,2 or 3, the number of described pressure transmitter 18 can be two, all is arranged on the cylinder body corresponding to epicoele 6.They measure the atmospheric pressure value of epicoele 6 at any time, and when crust breaking cylinder was worked, the control red light showed; The control green light shows when crust breaking cylinder is waited for, reflects the working condition of crust breaking cylinder in real time.In addition, can also be connected to hummer on a certain pressure transmitter, when tup fails the electrolytic bath shell face punched, the pressure of gas can be pressurized to set(ting)value automatically in the epicoele 6, transmitter sends signal and stops the blanking of blanking equipment, simultaneously, the control hummer sends tweeting sound, operates accordingly with prompting operation person.
Shown in Fig. 1,2 or 3, upper cylinder cover 1 is provided with locking mechanism.
As shown in Figure 1, described locking mechanism is the magnet 19 that is fixed in upper cylinder cover 1 bottom.After the tup crust breaking finishes, under the effect of cavity of resorption 5 gases, be back to cylinder barrel 3 tops, at this moment, the magnet 19 that is positioned at upper cylinder cover 1 bottom prevents its whereabouts with piston 4 absorption.When the needs crust breaking, after the gas of extraneous source of the gas enters epicoele 6, overcome the suction of magnet magnetic force to piston 4, make piston 4 descending, tup is descending to carry out the crust breaking operation to drive.
As shown in Figure 2, described locking mechanism includes sliding chamber 20 and latching ram 21, sliding chamber 20 is arranged on the upper cylinder cover 1, latching ram 21 active are positioned at sliding chamber 20, the sliding chamber 23, the right side that sliding chamber 20 is divided into sliding chamber 22, a left side that is communicated with epicoele 6 and is in communication with the outside, and latching ram 21 is provided with latch segment 24, piston rod 7 is provided with the groove 25 that matches with latch segment 24, be provided with spring 26 in the right sliding chamber 23, an end of spring 26 is against on the latching ram 20, and the other end is against on the upper cylinder cover 1.When piston 4 was in the top of cylinder barrel 3, the latch segment 24 on the latching ram 21 was positioned at groove 25, and piston is spacing at the top of cylinder barrel, prevented that tup from falling into electrolyzer; When crust breaking cylinder will carry out the crust breaking operation, extraneous source of the gas entered epicoele 4, and the gas that enters epicoele 4 promotes latching ram 21 to two side shiftings, make latch segment 24 break away from groove 25 on the pistons 4 to remove its restriction to piston 4, at this moment, it is descending that piston drives tup, carries out crust breaking.
Claims (9)
1. energy-conserving and environment-protective formula intelligence crust breaking cylinder, include cylinder body, described cylinder body includes upper cylinder cover (1), following cylinder cap (2) and cylinder barrel (3), the piston (4) that is positioned at cylinder barrel (3) is separated into cavity of resorption (5) and epicoele (6) with cylinder barrel (3), one end of piston rod (7) is connected with piston (4), and the other end stretches out cylinder cap (2) down; Cylinder body is provided with reversing control valve (8), and first output port of reversing control valve (8) passed through gas passage (9) and is communicated with cavity of resorption (5), and second output port is communicated with epicoele (6), and it is characterized in that: cylinder body is provided with commutation controlling mechanism.
2. energy-conserving and environment-protective formula intelligence crust breaking cylinder as claimed in claim 1, it is characterized in that: reversing control valve (8) is the gas control reversing control valve, commutation controlling mechanism is a pneumatic stroke valve (10), pneumatic stroke valve (10) is arranged on down the bottom of cylinder cap (2), the input port (11) of pneumatic stroke valve (10) and output port (12) are communicated with uptake, the control port of gas control reversing control valve respectively by control air flue (13), have a shake-up valve rod (14) that is positioned at cavity of resorption (5) on the pneumatic stroke valve (10).
3. energy-conserving and environment-protective formula intelligence crust breaking cylinder as claimed in claim 2, it is characterized in that: gas control passage (13) is the binary channel tracheae, this binary channel tracheae was positioned at gas passage (9), one of them tracheae is communicated with the input port (11) of pneumatic stroke valve (10) with the uptake of gas control reversing control valve, another tracheae is communicated with the output terminal 2 (12) of pneumatic stroke valve (10) with the control port of gas control reversing control valve.
4. energy-conserving and environment-protective formula intelligence crust breaking cylinder as claimed in claim 1, its spy is: reversing control valve (8) is the electromagnetic switch control valve, commutation controlling mechanism is arranged on down the travel switch (15) on the cylinder cap (2), and the trip switch (15) is connected by the control end of lead with the electromagnetic switch control valve.
5. energy-conserving and environment-protective formula intelligence crust breaking cylinder as claimed in claim 1, it is characterized in that: reversing control valve is the electromagnetic switch control valve, commutation controlling mechanism is magnetic switch (16), magnetic switch (16) is arranged at cylinder barrel (3) bottom, and be connected by the control end of lead with the electromagnetic switch control valve, piston (4) is provided with the magnet (17) that matches with magnetic switch (16).
6. energy-conserving and environment-protective formula intelligence crust breaking cylinder as claimed in claim 1, it is characterized in that: cylinder body is provided with pressure transmitter (18), and described pressure transmitter (18) is connected to pilot lamp and/or hummer.
7. as claim 1,2,3,4,5 or 6 described energy-conserving and environment-protective formula intelligence crust breaking cylinders, it is characterized in that: upper cylinder cover (1) is provided with locking mechanism.
8. energy-conserving and environment-protective formula intelligence crust breaking cylinder as claimed in claim 7, it is characterized in that: described locking mechanism is the magnet (19) that is fixed in upper cylinder cover (1) bottom.
9. energy-conserving and environment-protective formula intelligence crust breaking cylinder as claimed in claim 7, it is characterized in that: described locking mechanism includes sliding chamber (20) and latching ram (21), sliding chamber (20) is arranged on the upper cylinder cover (1), latching ram (21) active is positioned at sliding chamber (20), to slide the sliding chamber (23), the right side that chamber (20) is divided into sliding chamber (22), a left side that is communicated with epicoele (6) and is in communication with the outside, latching ram (21) is provided with latch segment (24), piston rod (7) is provided with the groove (25) that matches with latch segment (24), be provided with spring (26) in the right sliding chamber (23), one end of spring (26) is against on the latching ram (20), and the other end is against on the upper cylinder cover (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620111428 CN200985353Y (en) | 2006-09-28 | 2006-09-28 | Energy-saving environment-friendly intelligent crust breaking cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620111428 CN200985353Y (en) | 2006-09-28 | 2006-09-28 | Energy-saving environment-friendly intelligent crust breaking cylinder |
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| CN200985353Y true CN200985353Y (en) | 2007-12-05 |
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| CN 200620111428 Expired - Fee Related CN200985353Y (en) | 2006-09-28 | 2006-09-28 | Energy-saving environment-friendly intelligent crust breaking cylinder |
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| CN102011150A (en) * | 2010-12-31 | 2011-04-13 | 许磊 | Shell-press cylinder for aluminum electrolysis cell |
| CN102287417A (en) * | 2011-08-11 | 2011-12-21 | 肇庆市志成气动有限公司 | High-temperature special cylinder |
| CN102367579A (en) * | 2011-09-19 | 2012-03-07 | 大连维乐液压制造有限公司 | Electrolytic aluminium crust breaking cylinder feedback valve |
| CN102534681A (en) * | 2011-01-17 | 2012-07-04 | 北京航空航天大学 | Novel energy-saving air throttle for controlling air in crust breaking cylinders |
| CN102618888A (en) * | 2012-03-26 | 2012-08-01 | 高佩川 | Combined compact-type efficient energy-saving electronic control pneumatic electrolytic aluminum crust breaking system |
| CN102619799A (en) * | 2012-03-26 | 2012-08-01 | 南京工程学院 | Efficient energy-saving adjustable electronic control electrolytic aluminum crust breaking valve terminal system |
| CN102618887A (en) * | 2012-03-26 | 2012-08-01 | 南京工程学院 | Combined integrated energy-saving adjustable electrical control pneumatic electrolytic aluminum crust breaking system |
| CN102878145A (en) * | 2012-10-30 | 2013-01-16 | 烟台未来自动装备有限责任公司 | Energy-saving crust cylinder for electrolytic aluminium industry |
| CN102995062A (en) * | 2011-09-15 | 2013-03-27 | 沈阳博宇科技有限责任公司 | Intelligent shell-pressing method |
| CN103225090A (en) * | 2012-01-31 | 2013-07-31 | 贵阳铝镁设计研究院有限公司 | Energy-saving self-boiling point type discharging device |
| CN103343362A (en) * | 2013-07-29 | 2013-10-09 | 北京爱社时代科技发展有限公司 | System for detecting position of shell-breaking tank based on pressure signals |
| CN103883582A (en) * | 2014-04-01 | 2014-06-25 | 韩元杰 | Crust breaking air cylinder |
| CN111139500A (en) * | 2018-11-06 | 2020-05-12 | 云南云铝涌鑫铝业有限公司 | Control box for aluminum electrolysis crust breaking cylinder |
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| CN102011150A (en) * | 2010-12-31 | 2011-04-13 | 许磊 | Shell-press cylinder for aluminum electrolysis cell |
| CN102011150B (en) * | 2010-12-31 | 2012-08-15 | 许磊 | Shell-press cylinder for aluminum electrolysis cell |
| CN102534681A (en) * | 2011-01-17 | 2012-07-04 | 北京航空航天大学 | Novel energy-saving air throttle for controlling air in crust breaking cylinders |
| CN102534681B (en) * | 2011-01-17 | 2014-08-06 | 北京航空航天大学 | Novel energy-saving air throttle for controlling air in crust breaking cylinders |
| CN102287417A (en) * | 2011-08-11 | 2011-12-21 | 肇庆市志成气动有限公司 | High-temperature special cylinder |
| CN102995062B (en) * | 2011-09-15 | 2016-09-14 | 沈阳博宇科技有限责任公司 | A kind of intelligence pressure shell method |
| CN102995062A (en) * | 2011-09-15 | 2013-03-27 | 沈阳博宇科技有限责任公司 | Intelligent shell-pressing method |
| CN102367579A (en) * | 2011-09-19 | 2012-03-07 | 大连维乐液压制造有限公司 | Electrolytic aluminium crust breaking cylinder feedback valve |
| CN103225090A (en) * | 2012-01-31 | 2013-07-31 | 贵阳铝镁设计研究院有限公司 | Energy-saving self-boiling point type discharging device |
| CN103225090B (en) * | 2012-01-31 | 2016-10-05 | 贵阳铝镁设计研究院有限公司 | Energy-conservation self-boiling point feeding device |
| CN102619799A (en) * | 2012-03-26 | 2012-08-01 | 南京工程学院 | Efficient energy-saving adjustable electronic control electrolytic aluminum crust breaking valve terminal system |
| CN102618887A (en) * | 2012-03-26 | 2012-08-01 | 南京工程学院 | Combined integrated energy-saving adjustable electrical control pneumatic electrolytic aluminum crust breaking system |
| CN102618888A (en) * | 2012-03-26 | 2012-08-01 | 高佩川 | Combined compact-type efficient energy-saving electronic control pneumatic electrolytic aluminum crust breaking system |
| CN102878145A (en) * | 2012-10-30 | 2013-01-16 | 烟台未来自动装备有限责任公司 | Energy-saving crust cylinder for electrolytic aluminium industry |
| CN102878145B (en) * | 2012-10-30 | 2015-06-10 | 烟台未来自动装备有限责任公司 | Energy-saving crust cylinder for electrolytic aluminium industry |
| CN103343362A (en) * | 2013-07-29 | 2013-10-09 | 北京爱社时代科技发展有限公司 | System for detecting position of shell-breaking tank based on pressure signals |
| CN103343362B (en) * | 2013-07-29 | 2016-03-30 | 北京爱社时代科技发展有限公司 | A kind of crust breaking cylinder position detecting system based on pressure signal |
| CN103883582A (en) * | 2014-04-01 | 2014-06-25 | 韩元杰 | Crust breaking air cylinder |
| CN111139500A (en) * | 2018-11-06 | 2020-05-12 | 云南云铝涌鑫铝业有限公司 | Control box for aluminum electrolysis crust breaking cylinder |
| CN111139500B (en) * | 2018-11-06 | 2021-09-21 | 云南云铝涌鑫铝业有限公司 | Control box for aluminum electrolysis crust breaking cylinder |
| CN113996413A (en) * | 2020-07-28 | 2022-02-01 | 阮正富 | Bearing driving device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071205 Termination date: 20100928 |