CN103572687A - Double-mixing cylinder mixing method of emulsified asphalt plant-mixed cold-recycling mixture - Google Patents
Double-mixing cylinder mixing method of emulsified asphalt plant-mixed cold-recycling mixture Download PDFInfo
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Abstract
The invention discloses a double-mixing cylinder mixing method of an emulsified asphalt plant-mixed cold-recycling mixture, which comprises the following steps: mixing an old asphalt mixture with a new asphalt mixture according to a certain proportion, and then putting into a first stirring tank body, wherein the first stirring tank body is separated into two parts by a bent plate; putting the mixed new-old asphalt mixture into the first part and stirring; enabling the bent plate to rotate so that the mixture is driven to be stirred and finally stop at a position where the mixture is limited in the second part; mixing the mixture with cement powder and aluminum smelting waste residue according to a certain proportion, and stirring; conveying the obtained mixture doped with the cement and aluminum smelting waste residue into a second stirring tank body; spraying a certain amount of emulsified asphalt into the mixture from the position above the second stirring tank body; squeezing in a certain amount of water through a bottom opening of the second stirring tank body; and stirring. The method can improve the mixing quality of the emulsified asphalt and realize uniform coating of the emulsified asphalt so as to guarantee the pavement quality.
Description
Technical field
The present invention relates to the cold regeneration of pitch plantmix field, particularly the mixing method of a kind of Shuan Bangang mulseal plantmix cold regeneration mix.
Background technology
At present, the highway construction develop rapidly of China, annual scale of investment has surpassed 2,000 hundred million yuan, and the speedway that the age in the past accomplishes has entered big or middle repairing the phase, a large amount of digs, milling bituminous mixture goes out of use, and causes environment pollution.And highway construction needs bituminous material and the building stones of high-quality, the destruction that the new building stones of a large amount of uses, exploitated ore can cause ecological environment.During cold asphalt rehabilitation technology, needs are overhauled and discarded flexible pavement, through digging, reclaim, fragmentation, with newly gathering materials, the new suitable proportioning of bituminous material, mix again, through leveling compacting, formation meets the reclaimed asphalt mixture of pavement performance.The regeneration of bituminous mixture, can save a large amount of pitch and sandstone material, reduces the cost of building the road, and meanwhile, also helps the discarded asphalt pavement material of punishment, energy conservation, and protection of the environment, has significant economic benefit and social benefit.Because the incorporation of mulseal only has 4% left and right, cement, contents of ground slag are all below 2%, so easily produce pitch in the cold regenerative process of plantmix, wrap inhomogeneous problem, there is grey material phenomenon, make it to wrap equably on aggregate, must solve metering and the stirring technique of low-dosage element.
Summary of the invention
In order to solve the above-mentioned problem of mentioning, the object of the present invention is to provide the mixing method of a kind of Shuan Bangang mulseal plantmix cold regeneration mix, the method can improve the mixing quality of mulseal, realizes evenly wrapping of mulseal, thereby has guaranteed spreading quality.
Technical scheme provided by the invention is:
A mixing method for Shuan Bangang mulseal plantmix cold regeneration mix, is characterized in that, comprises the following steps:
The new bituminous mixture that step 1, the old asphalt mixture that is 0～20mm by diameter are 10-30mm with diameter mixes according to the ratio of 70～75:10～15, after mixing, dropping into first stirs in cell body, the first stirring cell body is oval-shaped upper shed cell body, and described first stirs cell body is separated into two parts by bent plate, mixed new old asphalt mixture is put in first, and the first stirring-head speed with 130～150 revs/min under the drive of the first motor being arranged in first stirs 2～3s along a direction of rotation;
Step 2, the 3rd driven by motor bent plate drive compound to stir 4～5s along a described direction of rotation with the speed of 50～60 revs/min, and finally stop at compound is limited to the position in the second portion relative with described first;
Step 3, in compound, according to mass percent, be compound: cement: the ratio that aluminium making residue is 95～100:3～5:1～2 is mixed into cement flour and aluminium making residue;
Step 4, the second stirring-head speed with 130～150 revs/min under the drive of the second motor being arranged in second portion stir 2～3s along the direction contrary with a described direction of rotation;
Step 5, by the doping obtaining in step 4 the compound of cement and aluminium making residue by belt conveyor, be transported to the second stirring cell body, in the compound that the upper direction of the second stirring cell body is conveyed into, spray a certain amount of mulseal, and in the compound being conveyed into, clamp-on a certain amount of water by the bottom opening of the second stirring cell body, then by the 3rd stirring-head speed with 110～120 revs/min under the drive of the 4th motor being arranged in the second stirring cell body, along the direction contrary with a described direction of rotation, stir 3～4s;
Wherein, the case of bending of bent plate is for meeting sinusoidal at least two bends.
Preferably, the mixing method of described Shuan Bangang mulseal plantmix cold regeneration mix, is characterized in that, described bent plate comprises two bends of reverse setting.
Preferably, the mixing method of described Shuan Bangang mulseal plantmix cold regeneration mix, is characterized in that, described bent plate comprises four bends that oppositely arrange between two.
Preferably; the mixing method of described Shuan Bangang mulseal plantmix cold regeneration mix; it is characterized in that; in described step 3; also sneak into magnesium-smelting waste residues; first magnesium-smelting waste residues is pulverized and screened, choose the particle of granularity below 100 orders and be blended in compound, the quality of the magnesium-smelting waste residues particle of wherein sneaking into is 5%～15% of the compound that obtains in step 2.
Preferably, the mixing method of described Shuan Bangang mulseal plantmix cold regeneration mix, is characterized in that, the new bituminous mixture that described step 1, the old asphalt mixture that is 0～20mm by diameter are 10-30mm with diameter mixes according to the ratio of 75:15.
Preferably, the mixing method of described Shuan Bangang mulseal plantmix cold regeneration mix, is characterized in that, described the second stirring cell body is cuboid, and further comprising the steps of after described step 5:
Step 6, the second stirring cell body is carried out to vibrations along its length, the vibration amplitude of every side is 1/2nd of the second agitation tank body length, and vibration frequency is 40～45r/ minute, and 10～15s is carried out in vibrations;
Step 7, then stirs 3～4s by the 3rd stirring-head speed with 110～120 revs/min under the drive of the 4th motor being arranged in the second stirring cell body along a described direction of rotation.
Preferably, the mixing method of described Shuan Bangang mulseal plantmix cold regeneration mix, it is characterized in that, described mulseal sprays downwards by being arranged on the drencher head of the second stirring cell body top, the middle part of described drencher head is square opening, outermost periphery is circular port, and the area of square opening is circular port 1.5 times.
Preferably, the mixing method of described Shuan Bangang mulseal plantmix cold regeneration mix, is characterized in that, in described step 5, the quality of described a certain amount of mulseal be the compound that obtains in step 4 quality 4.2～4.5%.
Preferably, the mixing method of described Shuan Bangang mulseal plantmix cold regeneration mix, is characterized in that, in described step 5, the quality of described a certain amount of water be the compound that obtains in step 4 quality 2.2～2.5%.
Preferably, the mixing method of described Shuan Bangang mulseal plantmix cold regeneration mix, it is characterized in that, in described step 5, the cellular structure of the second bottom opening that stirs cell body for being formed by a plurality of holes, the diameter in each hole not etc., but is not all no more than 3mm, and bottom opening is connected with feed pipe, and the water in feed pipe is pumped to bottom opening by high pressure conveying pump.
The mixing method of Shuan Bangang mulseal of the present invention plantmix cold regeneration mix, in the first stirring cell body, bent plate is set, bent plate is separated into two parts by cell body, play the effect of barrier, and bent plate rotation can be shifted second portion onto the compound that is positioned at first, by old asphalt mixture with new bituminous mixture by a certain percentage after the first of the first stirring cell body stirs, by the 3rd driven by motor bent plate, with certain rotating speed, drive mixture to rotate again, new and old mixture is more evenly mixed.New and old mixture mixes with cement, aluminium making residue after evenly mixing again, has improved mixing quality.Adulterated after the mixture of cement and aluminium making residue stirs and be sent in the second stirring cell body, by being arranged on the drencher head of the second stirring cell body top, spray mulseal downwards, because drencher head is set to middle part for square opening, outermost periphery is circular port, make mulseal be decomposed into less unit and contact with mixture, spray scope is large, and sprays evenly, after the 3rd stirring-head stirs, thereby can make mulseal evenly wrap on compound.Second stirs cell body can shake along its length, make compound first carry out premixed with mulseal, water, then with the 3rd stirring-head being arranged in the second stirring cell body, under the drive of the 4th motor, with certain speed, rotating, strengthen evenly wrapping of mulseal and compound, avoided occurring grey material phenomenon.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the mixing method of the described a kind of Shuan Bangang mulseal plantmix cold regeneration mix of invention.
The specific embodiment
Below the present invention is described in further detail, to make those skilled in the art can implement according to this with reference to manual word.
Embodiment 1:
The mixing method that the invention provides a kind of Shuan Bangang mulseal plantmix cold regeneration mix, comprises the following steps:
The new bituminous mixture that step 1, the old asphalt mixture that is 0～20mm by diameter are 10-30mm with diameter mixes according to the ratio of 70:10, after mixing, dropping into first stirs in cell body, the first stirring cell body is oval-shaped upper shed cell body, and described first stirs cell body is separated into two parts by bent plate, described bent plate comprises two bends of reverse setting, mixed new old asphalt mixture is put in first, and the first stirring-head speed with 130 revs/min under the drive of the first motor being arranged in first stirs 2s along a direction of rotation;
Step 2, the 3rd driven by motor bent plate drive compound to stir 4s along a described direction of rotation with the speed of 50 revs/min, and finally stop at compound is limited to the position in the second portion relative with described first;
Step 3, in compound, according to mass percent, be compound: cement: the ratio that aluminium making residue is 95:5:2 is mixed into cement flour and aluminium making residue;
Step 4, the second stirring-head speed with 130 revs/min under the drive of the second motor being arranged in second portion stir 2s along the direction contrary with a described direction of rotation;
Step 5, by the doping obtaining in step 4 the compound of cement and aluminium making residue by belt conveyor, be transported to the second stirring cell body, in the compound that the upper direction of the second stirring cell body is conveyed into, spray quality and be 4.2% mulseal of the quality of the compound obtaining in step 4, and the bottom opening by the second stirring cell body is to clamp-oning 2.2% the water that quality is the quality of the compound that obtains in step 4 in the compound being conveyed into, wherein, mulseal sprays downwards by being arranged on the drencher head of the second stirring cell body top, the middle part of described drencher head is square opening, outermost periphery is circular port, and the area of square opening is circular port 1.5 times, the second bottom opening that stirs cell body is the cellular structure being comprised of a plurality of holes, the diameter in each hole is not etc., but be all no more than 3mm, and bottom opening is connected with feed pipe, and the water in feed pipe is pumped to bottom opening by high pressure conveying pump.
It is cuboid that step 6, described second stirs cell body, and the second stirring cell body is carried out to vibrations along its length, and the vibration amplitude of every side is 1/2nd of the second agitation tank body length, and vibration frequency is 40r/ minute, and 15s is carried out in vibrations;
Step 7, then stirs 3s by the 3rd stirring-head speed with 110 revs/min under the drive of the 4th motor being arranged in the second stirring cell body along a described direction of rotation.
Embodiment 2
The mixing method that the invention provides a kind of Shuan Bangang mulseal plantmix cold regeneration mix, comprises the following steps:
Step 1, the new bituminous mixture that the old asphalt mixture that is 0～20mm by diameter is 10-30mm with diameter mixes according to the ratio of 75:15, after mixing, dropping into first stirs in cell body, the first stirring cell body is oval-shaped upper shed cell body, and described first stirs cell body is separated into two parts by bent plate, described bent plate comprises four bends that oppositely arrange between two, mixed new old asphalt mixture is put in first, the the first stirring-head speed with 150 revs/min under the drive of the first motor being arranged in first stirs 3s along a direction of rotation,
Step 2, the 3rd driven by motor bent plate drive compound to stir 5s along a described direction of rotation with the speed of 60 revs/min, and finally stop at compound is limited to the position in the second portion relative with described first;
Step 3, in compound, according to mass percent, be compound: cement: the ratio that aluminium making residue is 95:3:2 is mixed into cement flour and aluminium making residue; Also sneak into magnesium-smelting waste residues, first magnesium-smelting waste residues is pulverized and screened, choose the particle of granularity below 100 orders and be blended in compound, the quality of the magnesium-smelting waste residues particle of wherein sneaking into is 15% of the compound that obtains in step 2.
Step 4, the second stirring-head speed with 150 revs/min under the drive of the second motor being arranged in second portion stir 3s along the direction contrary with a described direction of rotation;
Step 5, by the doping obtaining in step 4 the compound of cement and aluminium making residue by belt conveyor, be transported to the second stirring cell body, in the compound that the upper direction of the second stirring cell body is conveyed into, spray quality and be 4.5% mulseal of the quality of the compound obtaining in step 4, and the bottom opening by the second stirring cell body is to clamp-oning 2.5% the water that quality is the quality of the compound that obtains in step 4 in the compound being conveyed into, wherein, mulseal sprays downwards by being arranged on the drencher head of the second stirring cell body top, the middle part of described drencher head is square opening, outermost periphery is circular port, and the area of square opening is circular port 1.5 times, the second bottom opening that stirs cell body is the cellular structure being comprised of a plurality of holes, the diameter in each hole is not etc., but be all no more than 3mm, and bottom opening is connected with feed pipe, and the water in feed pipe is pumped to bottom opening by high pressure conveying pump.
It is cuboid that step 6, described second stirs cell body, and the second stirring cell body is carried out to vibrations along its length, and the vibration amplitude of every side is 1/2nd of the second agitation tank body length, and vibration frequency is 45r/ minute, and 15s is carried out in vibrations;
Step 7, then stirs 4s by the 3rd stirring-head speed with 120 revs/min under the drive of the 4th motor being arranged in the second stirring cell body along a described direction of rotation.
Embodiment 3
The mixing method that the invention provides a kind of Shuan Bangang mulseal plantmix cold regeneration mix, comprises the following steps:
The new bituminous mixture that step 1, the old asphalt mixture that is 0～20mm by diameter are 10-30mm with diameter mixes according to the ratio of 73:12, after mixing, dropping into first stirs in cell body, the first stirring cell body is oval-shaped upper shed cell body, and described first stirs cell body is separated into two parts by bent plate, described bent plate comprises two bends of reverse setting, mixed new old asphalt mixture is put in first, and the first stirring-head speed with 140 revs/min under the drive of the first motor being arranged in first stirs 3s along a direction of rotation;
Step 2, the 3rd driven by motor bent plate drive compound to stir 5s along a described direction of rotation with the speed of 55 revs/min, and finally stop at compound is limited to the position in the second portion relative with described first;
Step 3, in compound, according to mass percent, be compound: cement: the ratio that aluminium making residue is 97:4:1.5 is mixed into cement flour and aluminium making residue; Also sneak into magnesium-smelting waste residues, first magnesium-smelting waste residues is pulverized and screened, choose the particle of granularity below 100 orders and be blended in compound, the quality of the magnesium-smelting waste residues particle of wherein sneaking into is 5% of the compound that obtains in step 2.
Step 4, the second stirring-head speed with 140 revs/min under the drive of the second motor being arranged in second portion stir 3s along the direction contrary with a described direction of rotation;
Step 5, by the doping obtaining in step 4 the compound of cement and aluminium making residue by belt conveyor, be transported to the second stirring cell body, in the compound that the upper direction of the second stirring cell body is conveyed into, spray quality and be 4.3% mulseal of the quality of the compound obtaining in step 4, and the bottom opening by the second stirring cell body is to clamp-oning 2.3% the water that quality is the quality of the compound that obtains in step 4 in the compound being conveyed into, wherein, mulseal sprays downwards by being arranged on the drencher head of the second stirring cell body top, the middle part of described drencher head is square opening, outermost periphery is circular port, and the area of square opening is circular port 1.5 times, the second bottom opening that stirs cell body is the cellular structure being comprised of a plurality of holes, the diameter in each hole is not etc., but be all no more than 3mm, and bottom opening is connected with feed pipe, and the water in feed pipe is pumped to bottom opening by high pressure conveying pump.
It is cuboid that step 6, described second stirs cell body, and the second stirring cell body is carried out to vibrations along its length, and the vibration amplitude of every side is 1/2nd of the second agitation tank body length, and vibration frequency is 43r/ minute, and 12s is carried out in vibrations;
Step 7, then stirs 3s by the 3rd stirring-head speed with 115 revs/min under the drive of the 4th motor being arranged in the second stirring cell body along a described direction of rotation.
Although embodiment of the present invention are open as above, but it is not restricted to listed utilization in manual and embodiment, it can be applied to various applicable the field of the invention completely, for those skilled in the art, can easily realize other modification, therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details and illustrates here and the legend of describing.
Claims (10)
1. the mixing method of a Zhong Shuanbangang mulseal plantmix cold regeneration mix, is characterized in that, comprises the following steps:
The new bituminous mixture that step 1, the old asphalt mixture that is 0～20mm by diameter are 10-30mm with diameter mixes according to the ratio of 70～75:10～15, after mixing, dropping into first stirs in cell body, the first stirring cell body is oval-shaped upper shed cell body, and described first stirs cell body is separated into two parts by bent plate, mixed new old asphalt mixture is put in first, and the first stirring-head speed with 130～150 revs/min under the drive of the first motor being arranged in first stirs 2～3s along a direction of rotation;
Step 2, the 3rd driven by motor bent plate drive compound to stir 4～5s along a described direction of rotation with the speed of 50～60 revs/min, and finally stop at compound is limited to the position in the second portion relative with described first;
Step 3, in compound, according to mass percent, be compound: cement: the ratio that aluminium making residue is 95～100:3～5:1～2 is mixed into cement flour and aluminium making residue;
Step 4, the second stirring-head speed with 130～150 revs/min under the drive of the second motor being arranged in second portion stir 2～3s along the direction contrary with a described direction of rotation;
Step 5, by the doping obtaining in step 4 the compound of cement and aluminium making residue by belt conveyor, be transported to the second stirring cell body, in the compound that the upper direction of the second stirring cell body is conveyed into, spray a certain amount of mulseal, and in the compound being conveyed into, clamp-on a certain amount of water by the bottom opening of the second stirring cell body, then by the 3rd stirring-head speed with 110～120 revs/min under the drive of the 4th motor being arranged in the second stirring cell body, along the direction contrary with a described direction of rotation, stir 3～4s;
Wherein, the case of bending of bent plate is for meeting sinusoidal at least two bends.
2. the mixing method of Shuan Bangang mulseal as claimed in claim 1 plantmix cold regeneration mix, is characterized in that, described bent plate comprises two bends of reverse setting.
3. the mixing method of Shuan Bangang mulseal as claimed in claim 1 plantmix cold regeneration mix, is characterized in that, described bent plate comprises four bends that oppositely arrange between two.
4. the mixing method of Shuan Bangang mulseal as claimed in claim 1 plantmix cold regeneration mix; it is characterized in that; in described step 3; also sneak into magnesium-smelting waste residues; first magnesium-smelting waste residues is pulverized and screened; choose the particle of granularity below 100 orders and be blended in compound, the quality of the magnesium-smelting waste residues particle of wherein sneaking into is 5%～15% of the compound that obtains in step 2.
5. the mixing method of Shuan Bangang mulseal as claimed in claim 3 plantmix cold regeneration mix, it is characterized in that, the new bituminous mixture that described step 1, the old asphalt mixture that is 0～20mm by diameter are 10-30mm with diameter mixes according to the ratio of 75:15.
6. the mixing method of Shuan Bangang mulseal as claimed in claim 3 plantmix cold regeneration mix, is characterized in that, described second to stir cell body be cuboid, and further comprising the steps of after described step 5:
Step 6, the second stirring cell body is carried out to vibrations along its length, the vibration amplitude of every side is 1/2nd of the second agitation tank body length, and vibration frequency is 40～45r/ minute, and 10～15s is carried out in vibrations;
Step 7, then stirs 3～4s by the 3rd stirring-head speed with 110～120 revs/min under the drive of the 4th motor being arranged in the second stirring cell body along a described direction of rotation.
7. the mixing method of Shuan Bangang mulseal as claimed in claim 3 plantmix cold regeneration mix, it is characterized in that, described mulseal sprays downwards by being arranged on the drencher head of the second stirring cell body top, the middle part of described drencher head is square opening, outermost periphery is circular port, and the area of square opening is circular port 1.5 times.
8. the mixing method of Shuan Bangang mulseal as claimed in claim 7 plantmix cold regeneration mix, is characterized in that, in described step 5, the quality of described a certain amount of mulseal be the compound that obtains in step 4 quality 4.2～4.5%.
9. the mixing method of Shuan Bangang mulseal as claimed in claim 8 plantmix cold regeneration mix, is characterized in that, in described step 5, the quality of described a certain amount of water be the compound that obtains in step 4 quality 2.2～2.5%.
10. the mixing method of Shuan Bangang mulseal as claimed in claim 9 plantmix cold regeneration mix, it is characterized in that, in described step 5, the second bottom opening that stirs cell body is the cellular structure being comprised of a plurality of holes, the diameter in each hole is not etc., but be all no more than 3mm, and bottom opening is connected with feed pipe, and the water in feed pipe is pumped to bottom opening by high pressure conveying pump.
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| CN201310462459.9A CN103572687B (en) | 2013-09-30 | 2013-09-30 | A kind of two mixing method mixing cylinder mulseal cold in-plant recycling compound |
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| CN201310462459.9A CN103572687B (en) | 2013-09-30 | 2013-09-30 | A kind of two mixing method mixing cylinder mulseal cold in-plant recycling compound |
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| CN103572687B CN103572687B (en) | 2015-10-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105839497A (en) * | 2016-03-29 | 2016-08-10 | 南方高科工程技术有限公司 | Cold recycling classified and multiple-step blending method |
| CN110451870A (en) * | 2019-09-03 | 2019-11-15 | 北京盛广拓再生科技股份有限公司 | A kind of hgh-performance emulsified pitch cold plant-mixed regenerated asphalt concrete and preparation method |
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| US4549834A (en) * | 1983-09-29 | 1985-10-29 | Pester Refining Company | Asphalt rejuvenating composition and process |
| CN201305811Y (en) * | 2008-11-21 | 2009-09-09 | 中交西安筑路机械有限公司 | Secondary stirrer for emulsified bitumen cold regeneration |
| CN203021895U (en) * | 2013-01-14 | 2013-06-26 | 北京盛广拓公路科技有限公司 | Double-mixing-pot asphalt mixing device |
| CN203096565U (en) * | 2013-03-13 | 2013-07-31 | 山东省路桥集团有限公司 | Plant mixing type cold recycling mixing unit |
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2013
- 2013-09-30 CN CN201310462459.9A patent/CN103572687B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4549834A (en) * | 1983-09-29 | 1985-10-29 | Pester Refining Company | Asphalt rejuvenating composition and process |
| CN201305811Y (en) * | 2008-11-21 | 2009-09-09 | 中交西安筑路机械有限公司 | Secondary stirrer for emulsified bitumen cold regeneration |
| CN203021895U (en) * | 2013-01-14 | 2013-06-26 | 北京盛广拓公路科技有限公司 | Double-mixing-pot asphalt mixing device |
| CN203096565U (en) * | 2013-03-13 | 2013-07-31 | 山东省路桥集团有限公司 | Plant mixing type cold recycling mixing unit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105839497A (en) * | 2016-03-29 | 2016-08-10 | 南方高科工程技术有限公司 | Cold recycling classified and multiple-step blending method |
| CN110451870A (en) * | 2019-09-03 | 2019-11-15 | 北京盛广拓再生科技股份有限公司 | A kind of hgh-performance emulsified pitch cold plant-mixed regenerated asphalt concrete and preparation method |
| CN110451870B (en) * | 2019-09-03 | 2021-07-20 | 北京盛广拓再生科技股份有限公司 | High-performance emulsified asphalt plant-mixed cold recycled asphalt concrete and preparation method thereof |
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| CN103572687B (en) | 2015-10-28 |
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Address after: 101512 -2218, 110 building, 1 building, No. 66, Huan Hu Road, Miyun District, Miyun District, Beijing. Patentee after: Beijing Sheng Guangtuo recycled Polytron Technologies Inc Address before: 101500 room 209, office building, Miyun Investment Promotion Office, No. 69, West Bridge Road, Miyun, Beijing, -132 Patentee before: BEIJING SHENGGUANGTUO HIGHWAY TECHNOLOGY CO., LTD. |