CN102952373B - Thermoset ultrahigh-molecular epoxy resin railroad track spring Insulation rail distance keeper - Google Patents
Thermoset ultrahigh-molecular epoxy resin railroad track spring Insulation rail distance keeper Download PDFInfo
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- CN102952373B CN102952373B CN201210078854.2A CN201210078854A CN102952373B CN 102952373 B CN102952373 B CN 102952373B CN 201210078854 A CN201210078854 A CN 201210078854A CN 102952373 B CN102952373 B CN 102952373B
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Abstract
The present invention relates to a kind of corrosion-resistant, good weatherability, intensity is high, performance is up to the thermoset ultrahigh-molecular epoxy resin railroad track spring Insulation rail distance keeper of low-carbon steel (the Q235 steel workpiece requirement of strength specified such as GB/T700 1988 Q235), modified heat convertible epoxy resin containing 12 18% weight portions, the hyperbranched cure-crosslinking agent of 4 6% weight portions, the fibrous reinforcements of 60 86% weight portions, the powder body reinforcing material additive of 5.5 8.5% weight portions, said components consumption sum is 100%.Advantage: both contained substantial amounts of soft segment in molecular structure to alleviate the brittle property of epoxy resin, containing again the epoxide group of end-blocking, can participate in curing reaction, toughening effect is obvious, not only increase the adhesive strength of system, also substantially increase compressive strength and the shear strength of material.
Description
Technical field
The present invention relates to a kind of corrosion-resistant, good weatherability, intensity is high, performance up to low-carbon steel (such as GB/T700-1988
The Q235 steel workpiece requirement of strength that Q235 specifies) thermoset ultrahigh-molecular epoxy resin railroad track spring bar III type exhausted
Edge track gauge block, belongs to modified high-molecular field of plate manufacture.
Background technology
At present railway elastic bar I, II the used raw material of type Mudguard Abutment of the Buckling Part have metal carbon steel, nylon 6 (polyamide 6) and
Modification of nylon 66(modified polyamide 6 6) three major types, metal material apron block not corrosion resistant, the workpiece of corrosion quickly loses should be had
Performance；Nylon 6 apron block and modification of nylon 66 are due to its architectural characteristic (reason such as fatigue resistance loss and low temperature resistant difference)
In minor radius interval, cold district, arid area, pole use generally there is embrittlement, its service life receives and greatly limits.
Also having some thermoplas tic resin composites (phenolic) in prior art, it mainly uses thermoplastic resin to be viscous
Connect material, dry after glass fibre scumbling, then in the mode molded.Owing to thermoplastic resin is chain-like molecular structure, permitted
Polymolecular chain is combined by physical action, is limited by its technique, wherein dries low molecule quantity of solvent remaining in technique
Cannot ensure to overflow completely so that during later stage forming and hardening, molecule chain structural arrangement is uneven, and residual solvent cannot escape completely
Going out, the intensity causing unit are is uneven, wherein has bubble etc. cannot ensure the concordance of strength of materials quality so that this
Composite cannot be in some special high request product such as rail fasteners, automotive gearbox, pressure vessel, the deck of boat, plate armour
The aspects such as protection substitute existing metal material.
The epoxy resin hands used at present sticks with paste the composite of technique, and owing to technique falls behind, resin content cannot accurately be controlled
System, quality cannot ensure, uses ordinary epoxy resin and cure-crosslinking agent, needed for not reaching alternative metals material plus it again
Requirement of strength.
Summary of the invention
Purpose of design: avoid the weak point in background technology, a kind of corrosion-resistant, good weatherability of design, intensity is high, performance
Modified heat convertible supra polymer up to low-carbon steel (the Q235 steel workpiece requirement of strength specified such as GB/T700-1988 Q235)
Epoxy resin railroad track spring bar III type Insulation rail distance keeper.
Design: in order to achieve the above object, the thermoset ultrahigh-molecular epoxy resin ferrum designed by the present invention
Rail road spring bar III type Insulation rail distance keeper, by modified thermoset epoxy resin, hyperbranched cure-crosslinking agent, fiber reinforcement material
Material and powder body reinforcing material additive form.
1, using thermoset ultrahigh-molecular epoxy resin, cure-crosslinking agent is main binding material, it is to avoid chain divides
Sub-thermoplastic resin, easily by thermal softening, the drawback of hardening by cooling, forms three after it also avoid ordinary epoxy resin solidification simultaneously
Dimension cross-linked structure, though strand rigidity is strong but does not reaches that metal strength, toughness is bad, not impact resistance defect, well make use of
Thermoset ultrahigh-molecular epoxy resin and cure-crosslinking agent are cross-linked by chemical bond, and cladodification is branching shape rigid net
Rock-steady structure provides the mechanical performances such as the tensile strength of high strength composite, yield strength and percentage elongation.
2, controlling to infiltrate quantitative fibrous reinforcements becomes viscosity to be 50000-100000 Pa.s's through defoaming treatment
Thick pulpous state or paste prepreg so that prepreg can be stopped secretly to steep by effective air-out under the effect of defoamer, again will not
The solidification of the material molding of impact, takes the technological means such as precuring, the interior demoulding and the Teflon demoulding, is effectively controlled preimpregnation
The denseness of material so that final obtains composite density uniformly, and size is perfect, has excellent mechanical performance.
3, thermosetting modified epoxy resin is to be equipped with polyether-modified methyl tetrahydro phthalic anhydride with bisphenol A epoxide resin to use epoxy again
The endurable active toughener of base end-blocking, its manufacture method: first by polyethers vacuum dehydration 1 hour under 120 ° of C, then by polyethers and methyl four
Hydrogen phthalic anhydride is reacted 3 hours under the effect of catalyst in 3:1 ratio under 130-140 ° of C, is cooled to 120 ° of C and adds epoxy resin
React 2 hours, obtain the intrinsic toughening endurable active toughener of epoxy radicals end-blocking.The good technology that its toughener is brought in this application
Effect is: the fragility of epoxy resin directly affects it and uses further, and most formula are required for carrying out toughening modifying, to carry
The resistance to impact of high goods is eased up and is solved internal stress when solidifying, and reduces the fragility of curable epoxide thing.The active ring of the application synthesis
Oxygen toughener, had both contained substantial amounts of soft segment to alleviate the brittle property of epoxy resin, had contained again in its molecular structure
The epoxide group of end-blocking, can participate in curing reaction, and toughening effect is obvious, not only increases the adhesive strength of system, the most significantly carries
The compressive strength of high material and shear strength.
Technical scheme 1: a kind of thermoset ultrahigh-molecular epoxy resin railroad track spring bar III type Insulation rail distance keeper,
Modified heat convertible epoxy resin containing 12-18% weight portion, the hyperbranched cure-crosslinking agent of 4-6% weight portion, 60-86% weight
The fibrous reinforcements of part, the powder body reinforcing material additive of 5.5-8.5% weight portion；Said components consumption sum is
100%”。
Technical scheme 2: a kind of thermoset ultrahigh-molecular epoxy resin railroad track spring bar III type Insulation rail distance keeper
Preparation method, adds the modified heat convertible epoxy resin of 12-18% weight portion and the powder body reinforcing material of 5.5-8.5% weight portion
Agent mixed grinding is uniform jelly, and the hyperbranched cure-crosslinking agent being proportionally added into 4-6% weight portion stirs, and then soaks
Moisten the fibre reinforced materials of quantitative 60-86% weight portion and make thick pulpous state that viscosity is 50000-100000 Pa.s or paste is pre-
Leaching material, said components consumption sum is 100%, then is placed in by prepreg in the mould after heating, after-applied more than the 1000KN of aerofluxus
Pressure, control temperature at 165-175 DEG C, obtain finished product modified heat convertible supra polymer asphalt mixtures modified by epoxy resin through the solidification of 3-6 minute secondary
Fat railroad track spring bar III type Insulation rail distance keeper ".
Background of invention is compared, and one is the thermoset ultrahigh-molecular epoxy resin rail obtained by the application
Road spring bar III type Insulation rail distance keeper, is one nonmetallic materials completely, has abandoned and has used metal to wait insulant with nonmetal
The technical scheme of the composite of bonding produced with combination high intensity, fundamentally avoids metal material and non-metallic insulation material
The linear expansion coefficient existed between material, the adverse effect that tensile strength, yield strength and percentage elongation bring；Two is to have employed high score
Sub-thermosetting high-intensity resin, cure-crosslinking agent are main binding material, it is to avoid chain molecule thermoplastic resin is easily heated soft
Change, the drawback of hardening by cooling, well make use of thermosetting resin and hyperbranched cure-crosslinking agent to be cross-linked one by chemical bond
The rigid net rock-steady structure and the tree-like plasticising structure that rise provide the tensile strength of composite, yield strength and percentage elongation etc.
Mechanical performance, controls the preimpregnation of thermoset ultrahigh-molecular epoxy resin railroad track spring bar III type Insulation rail distance keeper simultaneously
The viscosity of material is 50000-100000 Pa.s so that the discharge that prepreg can be fully effective under the effect of froth breaking migration agent is empty
Gas is stopped secretly to steep, and the forming and hardening of the material not interfered with again is taked the technological means such as grinding and coloring and the interior demoulding, effectively controlled
Make the viscosity of prepreg so that final obtains composite colour stable, even density, and quality is perfect, has excellent
Machine
Tool performance；Three is to use the made product strength of composite of the application high and modulus is high, and compact dimensions is accurate
Stable, density is homogeneous, and the class of insulation is high, the feature that coefficient of friction is little；Four is that the application passes through pultrusion, molds, is laminated, transmits mould
The forming method mould, cast, injected can make required rail fasteners, automotive gearbox, pressure vessel, the deck of boat, plate armour
The composites such as protection；Five is the thermoset ultrahigh-molecular epoxy resin railroad track spring bar III type obtained by the application
Insulation rail distance keeper and application thereof, have good mechanical performance, and material forming degree is high, and range is wide, the life-span is long, can reach completely
To existing Q235 steel respective strengths, may apply in industry-by-industry.
Detailed description of the invention
Embodiment 1: a kind of thermoset ultrahigh-molecular epoxy resin railroad track spring bar III type Insulation rail distance keeper, its
Feature is the modified heat convertible epoxy resin containing 12-18% weight portion, the hyperbranched cure-crosslinking agent of 4-6% weight portion, 60-
The fibrous reinforcements of 86% weight portion, the powder body reinforcing material additive of 5.5-8.5% weight portion, said components consumption sum
It is 100%.
Described modified heat convertible epoxy resin contains 14-16%(14% or 14.8% or 15% or 15.5% or 16%) weight portion
Bisphenol A epoxide resin and 0.15-0.25%(0.15% or 0.2% or 0.25%) the polyether-modified methyl tetrahydro phthalic anhydride of weight portion is toughness reinforcing
Agent mixes；The bisphenol A epoxide resin of described 14-16% weight portion is by 2:1 by E-51 epoxy resin and E-44 epoxy resin
Proportions form；Described hyperbranched Orazamide derivant firming agent is by trimethylolpropane 15-20%(15% or 16%
Or 17% or 18% or 19% or 20%), 2,2-dihydromethyl propionic acid 15-21%(15% or 16% or 17% or 18% or 19% or 20% or
21%), dioxanes 13-17%(13% or 14% or 15% or 16% or 17%), succinic anhydrides 13-17%(13% or 14% or 15% or 16%
Or 17%), 2-methylimidazole 40-50%(40% or 45% or 50%) proportioning forms, and said components consumption sum is 100%.
Described hyperbranched cure-crosslinking agent is containing 1.0-2.2%(1.0% or 1.5% or 2.0% or 2.2%) weight portion super
Branched Orazamide derivant firming agent and 3.0-4.0%(3.0% or 3.5% or 4.0%) methyl tetrahydro phthalic anhydride of weight portion joins
Ratio forms；
Described fibrous reinforcements refers to that glass fibre, carbon fiber, boron fibre, silicon carbide fibre and noble metal fiber are appointed
Anticipating, one or both combine；
Described powder body reinforcing material refers to 0.25-0.35%(0.25% or 0.30% or 0.35%) white carbon black of weight portion, 3.0-
3.5%(3.0% or 3.2% or 3.5%) cenosphere of weight portion, 3.0-4.0%(3.0% or 3.5% or 4.0%) Muscovitum of weight portion
One or more combination of powder.
Embodiment 2: on the basis of embodiment 1, the modified heat convertible epoxy resin containing 15% weight portion, 5% weight portion
Hyperbranched cure-crosslinking agent, 73% percent by weight fiber shape reinforcing material, the powder body reinforcing material additive of 7% weight portion.
Embodiment 3: on the basis of embodiment 1 or 2, a kind of thermoset ultrahigh-molecular epoxy resin railroad track is used
Spring bar III type Insulation rail distance keeper preparation method, by modified heat convertible epoxy resin and the 5.5-8.5% weight portion of 12-18% weight portion
Powder body reinforcing material additive mixed grinding be uniform jelly, be proportionally added into 4-6% weight portion hyperbranched solidification crosslinking
Agent stirs, and then infiltrate the fibre reinforced materials of quantitative 60-86% weight portion making viscosity is 50000-100000
The thick pulpous state of Pa.s or paste prepreg, said components consumption sum is 100%, then is placed in by prepreg in the mould after heating,
The pressure of after-applied more than the 1000KN of aerofluxus, control temperature, at 165-175 DEG C, obtains finished product through secondary solidification in 3-6 minute modified
Thermosetting supra polymer epoxy resin railroad track spring bar III type Insulation rail distance keeper.Infiltrate quantitative fibrous reinforcements warp
Cross thick pulpous state that defoaming treatment becomes viscosity to be 50000-100000 Pa.s or paste prepreg by pultrusion, mold, be laminated, pass
Pass molding, cast, the forming method injected makes the railroad track spring bar III type substituting ZJZ304 (GW)-02-2006 regulation
Insulation rail distance keeper.
Example 1: the thermoset ultrahigh-molecular epoxy resin railroad track bullet that the casting die that the present embodiment describes prepares
Bar III type Insulation rail distance keeper, is will to prepare modified heat convertible epoxy resin modification epoxy resin and powdery increasing to scale
Strong meterial additive white carbon black (adjusting pigment as required), cenosphere, mica powder mixing, be ground to uniform pulpous state, stir
Add hyperbranched cure-crosslinking agent in 2:1 ratio after mixing uniformly, infiltrate quantitative glass fibre, soften 20-40 at 60-80 DEG C and divide
Preparing prepreg after clock, be quantitatively placed in by prepreg in the mould after heating, pressurize after aerofluxus 1500KN, controls temperature 165-
175 DEG C, after 3-6 minute curing molding, mould pressing process is i.e. used to make described securing member.The most by weight, described fibre
Dimension shape reinforcing material is for for 78 parts, and modified epoxy mixture is 18 parts (containing hyperbranched cure-crosslinking agents), granular enhancing material
Feed additives is 4 parts.
Example 2: the high intensity thermosetting polymer-based composite that the present embodiment describes, is will to prepare modification to scale
Thermosetting epoxy resin modified epoxy and granular reinforcing material additive white carbon black, silicon dioxide,
Mica powder mixes, and is ground to uniform pulpous state, is proportionally added into hyperbranched cure-crosslinking agent, at 100-after stirring
After 120 DEG C of infiltration precuring, the combination of quantitative fibrous reinforcements glass fibre and carbon fiber is added through broadwise
Mold heat (controlling temperature 165-175 DEG C, pulling force 80-120 KN) continuously and smoothly's pultrusion (3-6 minute effective hardening time), insulation
The bar of broadwise consistent size is prepared after hardening, mellow and full molding of polishing after shearing by certain size, i.e. prepare and use pultrusion work
Skill makes described thermoset ultrahigh-molecular epoxy resin railroad track spring bar III type Insulation rail distance keeper.
The present embodiment describes the thermoset ultrahigh-molecular epoxy resin railroad track spring bar III type that pultrusion method prepares
Insulation rail distance keeper, described modified epoxy is: 20 parts of modified epoxy mixture (containing hyperbranched cure-crosslinking agent)；Institute
Stating fibrous reinforcements is: glass fibre and carbon fibers totally 75 parts；Described granular reinforcing material is: white carbon black, titanium dioxide
Silicon, the combination totally 5 parts of mica powder.
Thermoset ultrahigh-molecular epoxy resin railroad track spring bar III type Insulation rail distance keeper and ferrum mark material requirements
Test result compares:
It is to be understood that: although the mentality of designing of the present invention is contrasted by above-described embodiment, detailed word is retouched
State, but these words describe, simply the simple text of mentality of designing of the present invention is described rather than to mentality of designing of the present invention
Restriction, any combination without departing from mentality of designing of the present invention, increase or revise, each falling within protection scope of the present invention.
Claims (5)
1. a thermoset ultrahigh-molecular epoxy resin railroad track spring bar III type Insulation rail distance keeper, it is characterized in that containing
The modified heat convertible epoxy resin of 12-18% weight portion, the hyperbranched cure-crosslinking agent of 4-6% weight portion, 60-86% weight portion
Fibrous reinforcements, the powder body reinforcing material additive of 5.5-8.5% weight portion；Said components consumption sum is 100%；Described
Modified heat convertible epoxy resin contains the bisphenol A epoxide resin of 14-16% weight portion and the polyether-modified of 0.15-0.25% weight portion
Methyl tetrahydro phthalic anhydride toughener mixes；Described hyperbranched cure-crosslinking agent is the hyperbranched miaow containing 1.0-2.2% weight portion
Azoles amidated derivative firming agent forms with the methyl tetrahydro phthalic anhydride proportioning of 3.0-4.0% weight portion；Described fibrous reinforcements
Refer to glass fibre, carbon fiber, boron fibre, silicon carbide fibre and noble metal fiber any one or two kinds of combinations；Described powder body
Reinforcing material refers to the white carbon black of 0.25-0.35% weight portion, the cenosphere of 3.0-3.5% weight portion, 3.0-4.0% weight portion
One or more combination of mica powder.
Thermoset ultrahigh-molecular epoxy resin railroad track spring bar III type insulation gauge tie the most according to claim 1
Block, is characterized in that the modified heat convertible epoxy resin containing 15% weight portion, the hyperbranched cure-crosslinking agent of 5% weight portion, 73% weight
Amount part fibrous reinforcements, the powder body reinforcing material additive of 7% weight portion.
Thermoset ultrahigh-molecular epoxy resin railroad track spring bar III type insulation gauge tie the most according to claim 1
Block, is characterized in that: described bisphenol A epoxide resin is by the proportions of 2:1 by E-51 epoxy resin and E-44 epoxy resin
Become；Described hyperbranched Orazamide derivant firming agent is by trimethylolpropane 15-20%；2,2-dihydromethyl propionic acid 15-
21%；Dioxanes 13-17%；Succinic anhydrides 13-17%；2-methylimidazole 40-50% proportioning forms；Said components consumption sum is
100%。
Thermoset ultrahigh-molecular epoxy resin railroad track spring bar III type insulation gauge tie the most according to claim 1
Block, is characterized in that: by modified heat convertible epoxy resin and the powder body reinforcing material of 5.5-8.5% weight portion of 12-18% weight portion
Additive mixed grinding is uniform jelly, and the hyperbranched cure-crosslinking agent being proportionally added into 4-6% weight portion stirs, so
The thick pulpous state or cream that viscosity is 50000-100000 Pa.s made by the fibre reinforced materials of the 60-86% weight portion that rear infiltration is quantitative
Shape prepreg, said components consumption sum is 100%；Again prepreg is placed in the mould after heating, the after-applied 1000KN of aerofluxus
Above pressure, control temperature, at 165-175 DEG C, obtains finished product modified heat convertible supra polymer ring through secondary solidification in 3-6 minute
Epoxy resins railroad track spring bar III type Insulation rail distance keeper.
Thermoset ultrahigh-molecular epoxy resin railroad track spring bar III type insulation gauge tie the most according to claim 4
Block, is characterized in that: infiltrate the thickness that quantitative fibrous reinforcements becomes viscosity to be 50000-100000 Pa.s through defoaming treatment
Pulpous state or paste prepreg by pultrusion, mold, be laminated, transfer modling, cast, the forming method injected makes and substitutes ZJZ304
(GW) the railroad track spring bar III type Insulation rail distance keeper of-02-2006 regulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210078854.2A CN102952373B (en) | 2011-08-26 | 2012-03-23 | Thermoset ultrahigh-molecular epoxy resin railroad track spring Insulation rail distance keeper |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110248614.8 | 2011-08-26 | ||
| CN2011102486148 | 2011-08-26 | ||
| CN201110248614 | 2011-08-26 | ||
| CN201210078854.2A CN102952373B (en) | 2011-08-26 | 2012-03-23 | Thermoset ultrahigh-molecular epoxy resin railroad track spring Insulation rail distance keeper |
Publications (2)
| Publication Number | Publication Date |
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| CN102952373A CN102952373A (en) | 2013-03-06 |
| CN102952373B true CN102952373B (en) | 2016-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210078860.8A Expired - Fee Related CN102952375B (en) | 2011-08-26 | 2012-03-23 | A kind of special screw spike of thermoset ultrahigh-molecular epoxy resin railway |
| CN201210078854.2A Expired - Fee Related CN102952373B (en) | 2011-08-26 | 2012-03-23 | Thermoset ultrahigh-molecular epoxy resin railroad track spring Insulation rail distance keeper |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210078860.8A Expired - Fee Related CN102952375B (en) | 2011-08-26 | 2012-03-23 | A kind of special screw spike of thermoset ultrahigh-molecular epoxy resin railway |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103351579B (en) * | 2013-07-24 | 2015-03-04 | 成都市新筑路桥机械股份有限公司 | High polymer composite for embedded rail system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101760999A (en) * | 2010-01-08 | 2010-06-30 | 株洲时代工程塑料制品有限责任公司 | Modified nylon gauge apron matched with railway elastic rod type fastener |
| CN101985514A (en) * | 2010-11-03 | 2011-03-16 | 常熟佳发化学有限责任公司 | Thermosetting resin composition and preparation method and using method thereof |
| CN102079881A (en) * | 2010-12-16 | 2011-06-01 | 嘉兴安普铁路配件有限公司 | High intensity thermosetting molecule based composite material and application thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2231131A1 (en) * | 1971-07-01 | 1973-02-01 | Celmac Ag | RAIL FASTENING AND METHOD OF MANUFACTURING THEREOF |
| JPH0770406A (en) * | 1993-08-31 | 1995-03-14 | Tonen Corp | Low temperature curing epoxy resin for prepreg and prepreg using the same |
| FR2892429B1 (en) * | 2005-10-24 | 2007-12-14 | Edmond Mahikian | INSERT FOR THE RESTORATION OF A RAILWAY RAIL ANCHOR TO A WOODEN TRAVERSE |
| CN101265364B (en) * | 2007-07-27 | 2010-08-11 | 张国栋 | Thermoset plastics infiltration strengthened powdery plant fiber material and preparation method thereof |
| CN101250322A (en) * | 2008-04-11 | 2008-08-27 | 南京聚隆化学实业有限责任公司 | Nylon engineering plastic for high-speed railway rail fastening and method for manufacturing same |
| CN102206325B (en) * | 2010-03-31 | 2012-09-05 | 朱瑞澄 | Modification method of heat-resistant toughened methyl tetrahydrophthalic anhydride |
-
2012
- 2012-03-23 CN CN201210078860.8A patent/CN102952375B/en not_active Expired - Fee Related
- 2012-03-23 CN CN201210078854.2A patent/CN102952373B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101760999A (en) * | 2010-01-08 | 2010-06-30 | 株洲时代工程塑料制品有限责任公司 | Modified nylon gauge apron matched with railway elastic rod type fastener |
| CN101985514A (en) * | 2010-11-03 | 2011-03-16 | 常熟佳发化学有限责任公司 | Thermosetting resin composition and preparation method and using method thereof |
| CN102079881A (en) * | 2010-12-16 | 2011-06-01 | 嘉兴安普铁路配件有限公司 | High intensity thermosetting molecule based composite material and application thereof |
Also Published As
| Publication number | Publication date |
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| CN102952375B (en) | 2017-09-26 |
| CN102952375A (en) | 2013-03-06 |
| CN102952373A (en) | 2013-03-06 |
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