CN102294568A - Process for repairing breakage of rotary kiln tyre/roller - Google Patents
Process for repairing breakage of rotary kiln tyre/roller Download PDFInfo
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- CN102294568A CN102294568A CN201110109438XA CN201110109438A CN102294568A CN 102294568 A CN102294568 A CN 102294568A CN 201110109438X A CN201110109438X A CN 201110109438XA CN 201110109438 A CN201110109438 A CN 201110109438A CN 102294568 A CN102294568 A CN 102294568A
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- welding wire
- rotary kiln
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- deposited
- carrying roller
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000007704 transition Effects 0.000 claims abstract description 16
- 238000005520 cutting process Methods 0.000 claims abstract description 7
- 238000005498 polishing Methods 0.000 claims abstract description 6
- 238000000227 grinding Methods 0.000 claims abstract description 5
- 238000003466 welding Methods 0.000 claims description 43
- 239000000463 material Substances 0.000 claims description 28
- 208000037656 Respiratory Sounds Diseases 0.000 claims description 24
- 239000003513 alkali Substances 0.000 claims description 18
- 230000007935 neutral effect Effects 0.000 claims description 18
- 239000002253 acid Substances 0.000 claims description 17
- 238000009418 renovation Methods 0.000 claims description 14
- 229910000734 martensite Inorganic materials 0.000 claims description 12
- 239000011230 binding agent Substances 0.000 claims description 11
- 229910052799 carbon Inorganic materials 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 230000001590 oxidative effect Effects 0.000 claims description 9
- 239000002893 slag Substances 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 7
- 229910052698 phosphorus Inorganic materials 0.000 claims description 7
- 239000011574 phosphorus Substances 0.000 claims description 7
- 229910001566 austenite Inorganic materials 0.000 claims description 6
- 229910001562 pearlite Inorganic materials 0.000 claims description 6
- 239000011651 chromium Substances 0.000 claims description 5
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 229910052796 boron Inorganic materials 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 229910000859 α-Fe Inorganic materials 0.000 claims description 3
- 206010011376 Crepitations Diseases 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 10
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 238000000151 deposition Methods 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- GUWKQWHKSFBVAC-UHFFFAOYSA-N [C].[Au] Chemical compound [C].[Au] GUWKQWHKSFBVAC-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- DQMUQFUTDWISTM-UHFFFAOYSA-N O.[O-2].[Fe+2].[Fe+2].[O-2] Chemical compound O.[O-2].[Fe+2].[Fe+2].[O-2] DQMUQFUTDWISTM-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000002153 concerted effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Nonmetallic Welding Materials (AREA)
Abstract
The invention discloses a process for repairing the breakage of a rotary kiln tyre/roller, comprising the following steps of: performing fixed connection at the two sides of a crack, cutting out a U-shaped crevasse, grinding, sequentially depositing a binding layer, a transition layer, a work layer and a processing layer at the crevasse, dismounting a fixing plate, and carrying out overall grinding and polishing. The process for repairing the breakage of the rotary kiln tyre/roller provided by the invention is low in repairing price, which is only 100,000-1500,000 Yuan, low in investment, simple in process, convenient to operate, easy to learn and grasp, novel in technology, low in cost, and practical and reliable; therefore, the process not only increases income and reduces expenditure for the country but also makes an enormous contribution to consumption reduction and energy conservation as well as resource conversation and efficiency improvement for an enterprise.
Description
Technical field
The present invention relates to a kind of rotary kiln tyre, carrying roller fracture renovation technique, it is widely used in industries such as cement plant, power plant, pelletizing plant, chemical plant, smeltery, composite fertilizer factory, pottery.
Background technology
Wheel band, carrying roller fracture at present can't be satisfied the reparation demand from technology, technology, material, and difficulty is big, it is big to be worth, and directly influence is produced, and does not still have restorative procedure at home and abroad, have to directly more change, and lose hugely, influences production again; Subject matter is: the strength grade of crackle and deposited metal, material, technology, technology is difficult to control, very easily cause the weld crack of weld seam, the crackle of weld seam and matrix border and the crackle in deposited zone are difficult to control, change a wheel and be with minimum 5,000 ten thousand yuan, contain needs of work such as the cost of overhaul, dismounting refractory brick, butt joint, lifting, school kiln, block refractory brick 28 days, also need every day directly to help with a toll of 1,000,000 yuan, as seen cost is costly, how solving this difficult problem, is the main attack problem of this technology, technology, material.
Summary of the invention
Primary and foremost purpose of the present invention is to provide a kind of rotary kiln tyre, carrying roller fracture renovation technique, and the technical solution used in the present invention is:
A kind of rotary kiln tyre, carrying roller fracture renovation technique comprise the steps: that the two ends of fixed head are affixed with the both sides of rotary kiln tyre crackle or carrying roller crackle respectively; Cut with oxygen from the depth direction of two side direction crackles of crackle, crackle is cut into the cut of section for " U " shape, the cut bottom surface is an arc; Polishing cut inwall and bottom surface to cut inwall and bottom surface expose smooth surface; The pearlite material is deposited with acid welding wire, forms binder course at cut inwall and bottom surface, brushes away coating and oxidizing slag; Martensitic material is deposited with acid welding wire and alkaline welding wire, forms transition zone on binder course, brushes away coating and oxidizing slag; Austenite material is deposited with acid welding wire and alkaline welding wire, forms working lining on binder course, brushes away coating and oxidizing slag; The deposited machined layer that forms on working lining of ferrite material is filled and led up crackle, removes fixed head, carries out integral grinding and polishing.
Preferably, described pearlite material comprises by mass percentage: carbon below 0.5%, chromium 12%, boron 1%～2%, silicon 3%～4%, surplus is a phosphorus.
Preferably, described martensitic material comprises by mass percentage: carbon 0%～0.1%, boron 1%～2%, silicon 3%～4%, iron 0%～1.5%, surplus are nickel.
Preferably, described austenite material comprises by mass percentage: carbon 0.4%～0.6%, nickel 35%, chromium 8%～12%, borosilicate mixture 6%～8%, surplus are iron.
Preferably, described transition zone neutral and alkali welding wire is 3: 1 with the deposited thickness ratio of acid welding wire.
Preferably, described working lining neutral and alkali welding wire is 1: 3 with the deposited thickness ratio of acid welding wire.
Preferably, the deposited thickness 6～9mm of described transition zone neutral and alkali welding wire; The deposited thickness 2～3mm of described transition zone neutral and alkali welding wire; The deposited thickness 0.1～0.15mm of described martensitic material.
Preferably, the deposited thickness 2～3mm of described working lining neutral and alkali welding wire; The deposited thickness 6～9mm of described working lining neutral and alkali welding wire; The deposited thickness 0.1～0.15mm of described martensitic material.
Preferably, adopt non-carburetting cutting mode that crackle is cut into the cut of section for " U " shape, the cut bottom surface is an arc.
The method according to this invention, fixed head are used to avoid crack growth; Crackle is cut into section be the cut of " U " shape, avoid forming " V " shape cut and cause stress to concentrate and the generation of the vertical crack that causes; Adopt non-carburetting cutting modes such as oxygen cutting, be difficult for staying the carbonaceous point, do not increase phosphorus content, thereby avoid causing deposited performance extreme difference than carburetting cutting mode (for example: carbon arc air gouging cuts, and the excellent phosphorus content of carbon gold reaches 99.9%); It is deposited in 3: 1 ratio that alkaline welding wire in the binder course adds acid welding wire, every layer of 2-3 millimeter, 0.10 millimeter to 0.20 millimeter in the pearlite alloys powder that adds preparation is deposited together, play the content of dilution sulphur and phosphorus, avoid and reduce the possibility of the cold and hot crackle generation of cladding layer, to change the structure of original material, strengthen the toughness of its joint portion, reach the resizing and the purpose of transition reinforcement progressively; Transition zone is based on martensitic structure, purpose is the good fusion that solves between each composition, the content of dilution C, Mn, this layer is deposited in alkaline welding wire and 3: 1 ratio of acid welding wire, be every layer of 2-3 millimeter, increase metallurgical junction 500 newton that make a concerted effort to make it to reach, further reach and play the effect that a kind of wear-resisting and anti-attrition is carried loose stress, increased impact flexibility between metal and the metal; Working lining guarantees that reinforced metal has high anti-heavily stressed abrasive wear behavior, good anti-corrosion, heat-resisting, fatigue performance based on austenite structure bidirectional wear resistant alloy; The machined layer purpose is to reduce hardness and intensity, is convenient to machining, reserves surplus for machining, guarantees mach precision and fineness.
Rotary kiln tyre provided by the invention, carrying roller fracture renovation technique, repairing price only is 10～150,000 yuan, small investment, easy, easy to operate, easy of technology, easily grasp, technology novelty, cost are low, solid, both, made huge contribution for enterprise's energy-conservation of consumption reduction, joint source synergy again for country increases income and decreases expenditure.
The specific embodiment
Describe the present invention in detail below in conjunction with specific embodiment, be used for explaining the present invention in this illustrative examples of the present invention and explanation, but not as a limitation of the invention.
Embodiment
With the wheel bandwidth is 700mm, and thickness is 600mm, and the crack depth of fracture is that 460mm is an example:
1) be that the block plate of 200*300*20mm or 200*300*30mm is weldingly fixed on crackle width both sides, with specification;
2), with the crackle be center line, dividing 230 millimeters depth directions to crackle equally to both sides cuts with oxygen, depth of cut surpasses crack depth 20mm, and crackle is cut into the cut of section for " U " shape, and the cut bottom surface is an arc, do not allow to cut with carbon arc air gouging, the excellent phosphorus content of carbon gold reaches 99.9%, very easily stays the carbonaceous point, increases phosphorus content, cause deposited performance extreme difference, so can not use the carbon arc air gouging patterning method;
3), cut after, till being ground to cut inwall and bottom surface and exposing the smooth surface of metal with abrasive machine; Purpose is to eliminate the remaining residual dystectic di-iron trioxide in cutting back, is convenient to deposited and combination;
4), the pearlite material is deposited with acid welding wire, forms binder course at cut inwall and bottom surface, brushes away coating and oxidizing slag;
Binder course component (mass percent):
| C | Cr | B | Si | P |
| ＜0.5 | 12 | 0.5-2.0 | 2.4-4.5 | Surplus |
5), martensitic material is deposited with acid welding wire and alkaline welding wire, forms transition zone on binder course, brushes away coating and oxidizing slag;
Transition zone component (mass percent):
| C | B | Si | Fe | Ni |
| ≤0.1 | 1.0-2.0 | 3.0-4.0 | ≤1.5 | Surplus |
The deposited thickness 6～9mm of described transition zone neutral and alkali welding wire; The deposited thickness 2～3mm of described transition zone neutral and alkali welding wire; Make that the transition zone neutral and alkali welding wire and the deposited thickness ratio of acid welding wire are 3: 1, the deposited thickness 0.1～0.15mm of described martensitic material;
6), austenite material is deposited with acid welding wire and alkaline welding wire, forms working lining on binder course, brushes away coating and oxidizing slag;
Working lining component (mass percent):
| C | Ni | Cr | B+Si | Fe |
| 0.4-0.6 | 35 | 8-12 | 6-8 | Surplus |
The deposited thickness 2～3mm of described working lining neutral and alkali welding wire; The deposited thickness 6～9mm of described working lining neutral and alkali welding wire; Make that the described working lining neutral and alkali welding wire and the deposited thickness ratio of acid welding wire are 1: 3, the deposited thickness 0.1～0.15mm of described martensitic material;
7), the deposited machined layer that on working lining, forms of ferrite material, crackle is filled and led up, remove fixed head, carry out integral grinding and polishing.
Detection after the reparation:
By unspoiled position is standard, does an arcograph, presses arcograph and basic circle contact site, detects with clearance gauge, be no more than 0.10mm～0.20mm and get final product, and as the outward appearance examination criteria of checking and accepting;
Whether have with supersonic detector flaw detection has weld defect;
Detect with hardometer, whether hardness is consistent with the hardness of matrix originally, and error generally is to satisfy the requirement of hardness fully between HB5～10.
More than the technical scheme that the embodiment of the invention provided is described in detail, used specific case herein the principle and the embodiment of the embodiment of the invention are set forth, the explanation of above embodiment only is applicable to the principle that helps to understand the embodiment of the invention; Simultaneously, for one of ordinary skill in the art, according to the embodiment of the invention, the part that on the specific embodiment and range of application, all can change, in sum, this description should not be construed as limitation of the present invention.
Claims (9)
1. a rotary kiln tyre, carrying roller fracture renovation technique is characterized in that comprising the steps:
The two ends of fixed head are affixed with the both sides of rotary kiln tyre crackle or carrying roller crackle respectively;
Cut with oxygen from the depth direction of two side direction crackles of crackle, crackle is cut into the cut of section for " U " shape, the cut bottom surface is an arc;
Polishing cut inwall and bottom surface to cut inwall and bottom surface expose smooth surface;
The pearlite material is deposited with acid welding wire, forms binder course at cut inwall and bottom surface, brushes away coating and oxidizing slag;
Martensitic material is deposited with acid welding wire and alkaline welding wire, forms transition zone on binder course, brushes away coating and oxidizing slag;
Austenite material is deposited with acid welding wire and alkaline welding wire, forms working lining on binder course, brushes away coating and oxidizing slag;
The deposited machined layer that forms on working lining of ferrite material is filled and led up crackle, removes fixed head, carries out integral grinding and polishing.
2. rotary kiln tyre according to claim 1, carrying roller fracture renovation technique is characterized in that:
Described pearlite material comprises by mass percentage: carbon below 0.5%, chromium 12%, boron 1%～2%, silicon 3%～4%, surplus is a phosphorus.
3. rotary kiln tyre according to claim 1, carrying roller fracture renovation technique is characterized in that:
Described martensitic material comprises by mass percentage: carbon 0%～0.1%, boron 1%～2%, silicon 3%～4%, iron 0%～1.5%, surplus are nickel.
4. rotary kiln tyre according to claim 1, carrying roller fracture renovation technique is characterized in that:
Described austenite material comprises by mass percentage: carbon 0.4%～0.6%, nickel 35%, chromium 8%～12%, borosilicate mixture 6%～8%, surplus are iron.
5. rotary kiln tyre according to claim 1, carrying roller fracture renovation technique is characterized in that:
Described transition zone neutral and alkali welding wire is 3: 1 with the deposited thickness ratio of acid welding wire.
6. rotary kiln tyre according to claim 1, carrying roller fracture renovation technique is characterized in that:
Described working lining neutral and alkali welding wire is 1: 3 with the deposited thickness ratio of acid welding wire.
7. rotary kiln tyre according to claim 1, carrying roller fracture renovation technique is characterized in that:
The deposited thickness 6～9mm of described transition zone neutral and alkali welding wire; The deposited thickness 2～3mm of described transition zone neutral and alkali welding wire; The deposited thickness 0.1～0.15mm of described martensitic material.
8. rotary kiln tyre according to claim 1, carrying roller fracture renovation technique is characterized in that:
The deposited thickness 2～3mm of described working lining neutral and alkali welding wire; The deposited thickness 6～9mm of described working lining neutral and alkali welding wire; The deposited thickness 0.1～0.15mm of described martensitic material.
9. rotary kiln tyre according to claim 1, carrying roller fracture renovation technique is characterized in that:
Adopt non-carburetting cutting mode that crackle is cut into the cut of section for " U " shape, the cut bottom surface is an arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110109438XA CN102294568B (en) | 2011-04-27 | 2011-04-27 | Process for repairing breakage of rotary kiln tyre/roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110109438XA CN102294568B (en) | 2011-04-27 | 2011-04-27 | Process for repairing breakage of rotary kiln tyre/roller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102294568A true CN102294568A (en) | 2011-12-28 |
| CN102294568B CN102294568B (en) | 2013-11-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110109438XA Active CN102294568B (en) | 2011-04-27 | 2011-04-27 | Process for repairing breakage of rotary kiln tyre/roller |
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| Country | Link |
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| CN (1) | CN102294568B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102873498A (en) * | 2012-10-16 | 2013-01-16 | 武汉开明高新科技有限公司 | Crack restoring process of ball mill slide sliding shoe and connection thereof with barrel |
| CN102922215A (en) * | 2012-11-23 | 2013-02-13 | 水文文 | Repairing process and repairing tool for excircle crack conquassation of tires and carrier rollers of rotary kiln |
| CN103192226A (en) * | 2013-04-22 | 2013-07-10 | 潍柴动力(潍坊)再制造有限公司 | Method for remedying water-eroded defects on finished surface of engine cylinder block |
| CN103223568A (en) * | 2012-01-30 | 2013-07-31 | 宝山钢铁股份有限公司 | Boss back abrasion repair method for bending roll of heavy plate mill |
| CN110091119A (en) * | 2019-06-10 | 2019-08-06 | 湖北开明高新科技有限公司 | A kind of 600 tons of stand motor rotor shaft fracture recovery techniques |
| CN110125610A (en) * | 2019-06-10 | 2019-08-16 | 湖北开明高新科技有限公司 | A kind of steel ladle trunnion of converter bearing position abrasion reconstructing and repairing process |
| CN110158079A (en) * | 2019-06-03 | 2019-08-23 | 湖北开明高新科技有限公司 | The single-tooth roller of crusher breaks tooth and spindle abrasion renovation technique |
| CN112872706A (en) * | 2021-01-13 | 2021-06-01 | 武汉彤烨科技有限公司 | Rotary kiln riding wheel and wheel belt damage repairing method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103223568A (en) * | 2012-01-30 | 2013-07-31 | 宝山钢铁股份有限公司 | Boss back abrasion repair method for bending roll of heavy plate mill |
| CN103223568B (en) * | 2012-01-30 | 2016-06-01 | 宝山钢铁股份有限公司 | Heavy plate mill roller boss back side method of worn |
| CN102873498A (en) * | 2012-10-16 | 2013-01-16 | 武汉开明高新科技有限公司 | Crack restoring process of ball mill slide sliding shoe and connection thereof with barrel |
| CN102873498B (en) * | 2012-10-16 | 2014-10-15 | 武汉开明高新科技有限公司 | Crack restoring process of ball mill slide sliding shoe and connection thereof with barrel |
| CN102922215A (en) * | 2012-11-23 | 2013-02-13 | 水文文 | Repairing process and repairing tool for excircle crack conquassation of tires and carrier rollers of rotary kiln |
| CN103192226A (en) * | 2013-04-22 | 2013-07-10 | 潍柴动力(潍坊)再制造有限公司 | Method for remedying water-eroded defects on finished surface of engine cylinder block |
| CN103192226B (en) * | 2013-04-22 | 2015-04-15 | 潍柴动力(潍坊)再制造有限公司 | Method for remedying water-eroded defects on finished surface of engine cylinder block |
| CN110158079A (en) * | 2019-06-03 | 2019-08-23 | 湖北开明高新科技有限公司 | The single-tooth roller of crusher breaks tooth and spindle abrasion renovation technique |
| CN110091119A (en) * | 2019-06-10 | 2019-08-06 | 湖北开明高新科技有限公司 | A kind of 600 tons of stand motor rotor shaft fracture recovery techniques |
| CN110125610A (en) * | 2019-06-10 | 2019-08-16 | 湖北开明高新科技有限公司 | A kind of steel ladle trunnion of converter bearing position abrasion reconstructing and repairing process |
| CN112872706A (en) * | 2021-01-13 | 2021-06-01 | 武汉彤烨科技有限公司 | Rotary kiln riding wheel and wheel belt damage repairing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102294568B (en) | 2013-11-20 |
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