CN105484864A - Air inlet structure for dual-fuel engine - Google Patents
Air inlet structure for dual-fuel engine Download PDFInfo
- Publication number
- CN105484864A CN105484864A CN201610039297.1A CN201610039297A CN105484864A CN 105484864 A CN105484864 A CN 105484864A CN 201610039297 A CN201610039297 A CN 201610039297A CN 105484864 A CN105484864 A CN 105484864A
- Authority
- CN
- China
- Prior art keywords
- air intake
- fuel
- air inlet
- house steward
- external admission
- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
- F02M21/0215—Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B69/00—Internal-combustion engines convertible into other combustion-engine type, not provided for in F02B11/00; Internal-combustion engines of different types characterised by constructions facilitating use of same main engine-parts in different types
- F02B69/02—Internal-combustion engines convertible into other combustion-engine type, not provided for in F02B11/00; Internal-combustion engines of different types characterised by constructions facilitating use of same main engine-parts in different types for different fuel types, other than engines indifferent to fuel consumed, e.g. convertible from light to heavy fuel
- F02B69/04—Internal-combustion engines convertible into other combustion-engine type, not provided for in F02B11/00; Internal-combustion engines of different types characterised by constructions facilitating use of same main engine-parts in different types for different fuel types, other than engines indifferent to fuel consumed, e.g. convertible from light to heavy fuel for gaseous and non-gaseous fuels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
- F02M21/0278—Port fuel injectors for single or multipoint injection into the air intake system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B2201/00—Fuels
- F02B2201/06—Dual fuel applications
- F02B2201/064—Liquid and gas
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Abstract
The invention discloses an air inlet structure for a dual-fuel engine. The air inlet structure comprises an air inlet pipe and a fuel air inlet manifold. The fuel air inlet manifold is connected with a valve piece box through a fuel air inlet branch pipe. The fuel air inlet manifold comprises an outer air inlet manifold body and an inner air inlet manifold body. The fuel air inlet branch pipe comprises an outer air inlet branch pipe body and an inner air inlet branch pipe body. One end of the outer air inlet branch pipe body is connected with the outer air inlet manifold body, and the other end of the outer air inlet branch pipe is connected with a cover plate of the valve piece box. One end of the inner air inlet branch pipe body is connected with the inner air inlet manifold body, and the other end of the inner air inlet branch pipe body is connected with a fuel gas inlet connecting pipe extending in the valve piece box. At least one fuel gas jetting valve communicated with the inner air inlet branch pipe body is arranged in the valve piece box, wherein a nozzle is arranged on the fuel gas jetting valve and extends in the air inlet pipe. The air inlet structure for the dual-fuel engine has the advantages of being simple and compact in structure, safe, reliable and high in combustion efficiency, and therefore the energy utilization rate is increased.
Description
Technical field
The present invention relates to combustion engine energy-saving technical field of emission reduction, particularly a kind of air intake structure of duel fuel engine.
Background technique
Internal-combustion engine, as main prime mover, is used widely in human society.And along with energy shortage, constantly the highlighting of environmental pollution problem, various countries actively develop the research of combustion engine energy-saving emission-reduction technology.In boat diesel engine field, carry out double fuel, scrubbed gas engine technology research and apply, effectively can promote Economy, reduce the discharge of the harmful matter such as NOx, particle simultaneously.
Diesel engine is because Power coverage is wide, the thermal efficiency is high and be used widely, but the tail gas harmful matter of burning due to pure diesel motor fuel is discharged in a large number, is cause one of air-polluting major reason; Rock gas is as one of clean energy resource, and the harmful matter in its products of combustion exhaust emissions is less, will become one of the main energy sources in future.Diesel oil-natural gas double fuel engine, on the basis ensureing original fuel effective supply, increases a set of natural gas supply system, increases certain volume thus.Before the many employings supercharging of current each internal-combustion engine enterprise, premix or in-cylinder direct injection mix two kinds of modes.Before employing supercharging, the mode of premix, will make suction tude be full of inflammable mixture, there is larger potential safety hazard, and also mixed gas can be caused to waste when scavenging; And the mode adopting in-cylinder direct injection to mix, be external control system and injection valve entirely, cost is high, and the injection valve life-span is shorter, and substitution ratio of NG is not high.Therefore, a set of compact structure, safe and reliable and the duel fuel engine air intake duct system of high substitution rate can be realized is needed to develop.
Summary of the invention
Technical problem to be solved by this invention is the present situation for prior art, provides structure simple, compact, safe and reliable, the air intake structure of a kind of duel fuel engine that energy utilization rate is high.
The present invention solves the problems of the technologies described above adopted technological scheme:
A kind of air intake structure of duel fuel engine, include air intake duct and fuel air house steward, fuel air house steward is connected with valve member case by fuel air arm, fuel air house steward comprises external admission house steward and Nei intake manifold, fuel air arm comprises external admission arm and interior air intake branch, one end of external admission arm is connected with described external admission house steward, its the other end is connected with the cover plate of valve member case, one end of interior air intake branch is connected with described interior intake manifold, and its other end is taken over the gas inlet stretched in valve member case and is connected; Be provided with the fuel gas injection valve that at least one is connected with described interior air intake branch in valve member case, fuel gas injection valve is provided with nozzle, nozzle stretches in described air intake duct.
For optimizing technique scheme, the concrete measure taked also comprises:
Above-mentioned external admission arm is bellows.
One end of above-mentioned external admission arm is connected with described external admission house steward by adpting flange; Flange gasket is provided with between external admission arm and external admission house steward; Same, the other end of external admission arm is connected by the cover plate of adpting flange with valve member case, is also provided with flange gasket between external admission arm and cover plate.
One end of above-mentioned interior air intake branch is connected with described interior intake manifold by attaching nut; Seal washer is provided with between interior air intake branch and external admission house steward; The other end of interior air intake branch to be taken over described gas inlet by attaching nut and is connected, and interior air intake branch and gas inlet are also provided with seal washer between taking over.
The sidewall of above-mentioned nozzle is vertically arranged with row's spray orifice, spray orifice is just to the air outlet of described air intake duct.
The number of above-mentioned fuel gas injection valve is two, each fuel gas injection valve is connected with two nozzles, is provided with demarcation strip between two nozzles.
Support is provided with, the structure triangular in shape of support between above-mentioned fuel air house steward and the outer wall of described air intake duct.
The top of above-mentioned fuel air house steward is provided with top board, and the bottom of fuel air house steward is provided with press table, and stud runs through described top board and press table, and is fixed on described support.
The sidewall that described air intake duct is close to by above-mentioned valve member case is arranged, and is arranged at the side of the suction flange of described air intake duct, is provided with seal ring at the bottom of valve member case bottom valve member case.
Above-mentioned fuel gas injection valve is installed on fuel gas injection valve fixed plate.
Compared with prior art, the air intake structure of a kind of duel fuel engine of the present invention, the air intake structure of existing diesel engine is transformed, in valve member case, fuel gas injection valve is set, thus realize the superposition of gas fuel, realize the double fuel supply of gas fuel and diesel fuel and form duel fuel engine; By arranging double-deck fuel air arm and double-deck fuel air house steward, ensure that the Security of fuel gas supply, structure of the present invention is simple, compact, and little to the air intake duct transformation of former motor.
In addition, the sidewall that air intake duct is close to by valve member case is arranged, and is arranged at the side of the suction flange of air intake duct, compact structure; And row's spray orifice that nozzle side wall is longitudinally arranged is just to air outlet, be conducive to the raising of combustion efficiency.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the right elevation of Fig. 1;
Fig. 3 is A portion enlarged view in Fig. 2;
Fig. 4 is the plan view of air intake duct air outlet in the present invention.
Embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the present invention.
Embodiment as shown in Figures 1 to 4,
Figure grade illustrates: air intake duct 1, air outlet 1a, suction flange 1b, fuel air house steward 2, external admission house steward 21, interior intake manifold 22, fuel air arm 3, external admission arm 31, interior air intake branch 32, valve member case 4, cover plate 41, seal ring 42 at the bottom of valve member case, gas inlet adapter 5, fuel gas injection valve 6, fuel gas injection valve fixed plate 6a, nozzle 61, spray orifice 61a, demarcation strip 62, support 7, top board 71, press table 72, stud 73, adpting flange 8, flange gasket 81, attaching nut 9, seal washer 91.
As shown in Figures 1 to 4,
The air intake structure of a kind of duel fuel engine of the present invention, include air intake duct 1 and fuel air house steward 2, fuel air house steward 2 is connected with valve member case 4 by fuel air arm 3, fuel air house steward 2 comprises external admission house steward 21 and interior intake manifold 22, fuel air arm 3 comprises external admission arm 31 and interior air intake branch 32, one end of external admission arm 31 is connected with described external admission house steward 21, its the other end is connected with the cover plate 41 of valve member case 4, one end of interior air intake branch 32 is connected with described interior intake manifold 22, its the other end is connected with the gas inlet adapter 5 stretched in valve member case 4, be provided with the fuel gas injection valve 6 be connected with described interior air intake branch 32 in valve member case 4, fuel gas injection valve 6 is provided with nozzle 61, nozzle 61 stretches in described air intake duct 1.
Fuel air house steward 2 and fuel air arm 3 all adopt double-layer tube wall structure, meet the requirement of ship's classification related specifications, can effectively prevent gas leakage from causing blast, the dangerous consequences such as poisoning, high safety.Its interior pipe by double wall pipe, outer tube correspondence connect, and structure is simple; And fuel air arm 3 adopts " 7 " character form structure, make structure more compact.
In embodiment, external admission arm 31 is bellows; Adopt bellows both increased external admission arm 31 flexibility, in turn ensure that intensity, more can ensure the Security of fuel gas supply.
In embodiment, one end of external admission arm 31 is connected with described external admission house steward 21 by adpting flange 8; Flange gasket 81 is provided with between external admission arm 31 and external admission house steward 21; Same, the other end of external admission arm 31 is connected with the cover plate 41 of valve member case 4 by adpting flange 8, is also provided with flange gasket 81 between external admission arm 31 and cover plate 41.
Outward appearance joint arranges the sealing that flange gasket 81 can ensure to connect, and pipe fitting also can be avoided directly to connect the raising to processing request caused.
In embodiment, one end of interior air intake branch 32 is connected with described interior intake manifold 22 by attaching nut 9; Seal washer 91 is provided with between interior air intake branch 32 and external admission house steward 21; The other end of interior air intake branch 32 is connected with described gas inlet adapter 5 by attaching nut 9, is also provided with seal washer 91 between interior air intake branch 32 and gas inlet adapter 5.
Interior pipe joint arranges seal washer 91, the sealing that in ensureing, pipe connects, and improves the Security of air intake structure further.
In embodiment, the sidewall of nozzle 61 is vertically arranged with row's spray orifice 61a, spray orifice 61a is just to the air outlet 1a of described air intake duct 1.
In embodiment, the number of fuel gas injection valve 6 is two, each fuel gas injection valve 6 is connected with between two nozzles, 61, two nozzles 61 and is provided with demarcation strip 62.
Adopt demarcation strip 62 to be separated by nozzle 61, each nozzle 61 is in relatively independent cavity, contributes to the lifting of combustion efficiency, thus reduce exhaust emissions; And spray orifice 61a is just arranged the air outlet 1a of air intake duct 1.
In embodiment, between the outer wall of fuel air house steward 2 and described air intake duct 1, be provided with support 7, the structure triangular in shape of support 7.Adopt the support 7 of triangular structure, utilize leg-of-mutton stability to ensure the stability that support 7 supports.In the present embodiment, support 7 is in a right-angled triangle, and the hypotenuse of support 7 is arranged outwardly, while guarantee supporting structure stability, makes structure more compact.
In embodiment, the top of fuel air house steward 2 is provided with top board 71, and the bottom of fuel air house steward 2 is provided with press table 72, and stud 73 runs through described top board 71 and press table 72, and is fixed on described support 7.
In embodiment, the sidewall that described air intake duct 1 is close to by valve member case 4 is arranged, and is arranged at the side of the suction flange 1b of described air intake duct 1, is provided with seal ring 42 at the bottom of valve member case bottom valve member case 4; Structure is more compact, also effectively can improve combustion efficiency.
In embodiment, fuel gas injection valve 6 is installed on fuel gas injection valve fixed plate 6a.
The present invention is by the transformation to original diesel engine, by arranging fuel gas injection valve 6 in valve member case 4, and the nozzle 61 that fuel gas injection valve 6 connects stretches in air intake duct 1, add the supply of gas fuel and realize the double fuel supply of diesel oil, rock gas, thus original diesel engine being transformed into duel fuel engine.It is little to the change of original air intake duct, and reforming cost is low.
Most preferred embodiment of the present invention is illustrated, and the various change made by those of ordinary skill in the art or remodeling all can not depart from the scope of the present invention.
Claims (10)
1. the air intake structure of a duel fuel engine, include air intake duct (1) and fuel air house steward (2), it is characterized in that: described fuel air house steward (2) is connected with valve member case (4) by fuel air arm (3), described fuel air house steward (2) comprises external admission house steward (21) and interior intake manifold (22), described fuel air arm (3) comprises external admission arm (31) and interior air intake branch (32), one end of described external admission arm (31) is connected with described external admission house steward (21), its the other end is connected with the cover plate (41) of valve member case (4), one end of described interior air intake branch (32) is connected with described interior intake manifold (22), its the other end is taken over (5) with the gas inlet stretched in valve member case (4) and is connected, the fuel gas injection valve (6) that at least one is connected with described interior air intake branch (32) is provided with in described valve member case (4), described fuel gas injection valve (6) is provided with nozzle (61), and described nozzle (61) stretches in described air intake duct (1).
2. the air intake structure of a kind of duel fuel engine according to claim 1, is characterized in that: described external admission arm (31) is bellows.
3. the air intake structure of a kind of duel fuel engine according to claim 2, is characterized in that: one end of described external admission arm (31) is connected with described external admission house steward (21) by adpting flange (8); Flange gasket (81) is provided with between described external admission arm (31) and external admission house steward (21); Same, the other end of described external admission arm (31) is connected with the cover plate (41) of valve member case (4) by adpting flange (8), is also provided with flange gasket (81) between described external admission arm (31) and cover plate (41).
4. the air intake structure of a kind of duel fuel engine according to claim 3, is characterized in that: one end of described interior air intake branch (32) is connected with described interior intake manifold (22) by attaching nut (9); Seal washer (91) is provided with between described interior air intake branch (32) and external admission house steward (21); The other end of described interior air intake branch (32) is taken over (5) by attaching nut (9) and is connected with described gas inlet, described interior air intake branch (32) and gas inlet are taken between (5) and be also provided with seal washer (91).
5. the air intake structure of a kind of duel fuel engine according to claim 4, it is characterized in that: the sidewall of described nozzle (61) is vertically arranged with row's spray orifice (61a), described spray orifice (61a) is just to the air outlet (1a) of described air intake duct (1).
6. the air intake structure of a kind of duel fuel engine according to claim 5, it is characterized in that: the number of described fuel gas injection valve (6) is two, each fuel gas injection valve (6) is connected with two nozzles (61), between two nozzles (61), is provided with demarcation strip (62).
7. the air intake structure of a kind of duel fuel engine according to claim 6, it is characterized in that: between described fuel air house steward (2) and the outer wall of described air intake duct (1), be provided with support (7), the structure triangular in shape of described support (7).
8. the air intake structure of a kind of duel fuel engine according to claim 7, it is characterized in that: the top of described fuel air house steward (2) is provided with top board (71), the bottom of described fuel air house steward (2) is provided with press table (72), stud (73) runs through described top board (71) and press table (72), and is fixed on described support (7).
9. the air intake structure of a kind of duel fuel engine according to claim 8, it is characterized in that: the sidewall that described air intake duct (1) is close to by described valve member case (4) is arranged, and being arranged at the side of the suction flange (1b) of described air intake duct (1), described valve member case (4) bottom is provided with seal ring (42) at the bottom of valve member case.
10. the air intake structure of a kind of duel fuel engine according to claim 9, is characterized in that: described fuel gas injection valve (6) is installed on fuel gas injection valve fixed plate (6a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610039297.1A CN105484864B (en) | 2016-01-21 | 2016-01-21 | A kind of air intake structure of dual fuel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610039297.1A CN105484864B (en) | 2016-01-21 | 2016-01-21 | A kind of air intake structure of dual fuel engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105484864A true CN105484864A (en) | 2016-04-13 |
| CN105484864B CN105484864B (en) | 2019-05-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610039297.1A Active CN105484864B (en) | 2016-01-21 | 2016-01-21 | A kind of air intake structure of dual fuel engine |
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| CN (1) | CN105484864B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106523193A (en) * | 2016-12-30 | 2017-03-22 | 哈尔滨哈船动力技术有限责任公司 | Diesel oil and liquefied natural gas dual fuel engine gas safe supply device |
| CN108266289A (en) * | 2017-01-04 | 2018-07-10 | 江南造船(集团)有限责任公司 | High-pressure gas double-wall pipe |
| CN112502863A (en) * | 2020-12-18 | 2021-03-16 | 中船动力有限公司 | Double-wall connecting pipe for fuel gas injection of dual-fuel diesel engine |
| CN115013189A (en) * | 2022-05-27 | 2022-09-06 | 河南柴油机重工有限责任公司 | Gas valve protection device and method for gas engine |
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| CN104500275A (en) * | 2014-12-19 | 2015-04-08 | 重庆普什机械有限责任公司 | High-power dual-fuel engine gas intake pipe |
| CN104564430A (en) * | 2015-01-21 | 2015-04-29 | 哈尔滨工程大学 | Integrated gas supply device of gaseous fuel engine |
| CN205330808U (en) * | 2016-01-21 | 2016-06-22 | 宁波中策动力机电集团有限公司 | Dual -fuel engine's inlet structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103939240A (en) * | 2014-03-25 | 2014-07-23 | 南车玉柴四川发动机股份有限公司 | Double-layer fuel gas conveying system of multipoint gas inlet dual-fuel engine |
| CN104500275A (en) * | 2014-12-19 | 2015-04-08 | 重庆普什机械有限责任公司 | High-power dual-fuel engine gas intake pipe |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106523193A (en) * | 2016-12-30 | 2017-03-22 | 哈尔滨哈船动力技术有限责任公司 | Diesel oil and liquefied natural gas dual fuel engine gas safe supply device |
| CN108266289A (en) * | 2017-01-04 | 2018-07-10 | 江南造船(集团)有限责任公司 | High-pressure gas double-wall pipe |
| CN112502863A (en) * | 2020-12-18 | 2021-03-16 | 中船动力有限公司 | Double-wall connecting pipe for fuel gas injection of dual-fuel diesel engine |
| CN115013189A (en) * | 2022-05-27 | 2022-09-06 | 河南柴油机重工有限责任公司 | Gas valve protection device and method for gas engine |
| CN115013189B (en) * | 2022-05-27 | 2024-03-26 | 河南柴油机重工有限责任公司 | Gas valve protection device and method for gas engine |
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| Publication number | Publication date |
|---|---|
| CN105484864B (en) | 2019-05-31 |
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