CN111059367B - Anti-fouling and anti-blocking asphalt conveying pipe - Google Patents
Anti-fouling and anti-blocking asphalt conveying pipe Download PDFInfo
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- CN111059367B CN111059367B CN201911199675.2A CN201911199675A CN111059367B CN 111059367 B CN111059367 B CN 111059367B CN 201911199675 A CN201911199675 A CN 201911199675A CN 111059367 B CN111059367 B CN 111059367B
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- pipe
- conveying pipe
- positioning
- oil pipe
- fouling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L53/00—Heating of pipes or pipe systems; Cooling of pipes or pipe systems
- F16L53/30—Heating of pipes or pipe systems
- F16L53/32—Heating of pipes or pipe systems using hot fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
- F16L57/02—Protection of pipes or objects of similar shape against external or internal damage or wear against cracking or buckling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/028—Composition or method of fixing a thermally insulating material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/029—Shape or form of insulating materials, with or without coverings integral with the insulating materials layered
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
- F17D1/16—Facilitating the conveyance of liquids or effecting the conveyance of viscous products by modification of their viscosity
- F17D1/18—Facilitating the conveyance of liquids or effecting the conveyance of viscous products by modification of their viscosity by heating
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Road Paving Structures (AREA)
Abstract
The invention provides an anti-fouling and anti-blocking asphalt conveying pipe which comprises a conveying pipe body, wherein an inner heat conduction oil pipe is arranged in the conveying pipe body, the conveying pipe body comprises a first material pipe and a second material pipe which are communicated, and an outer heat conduction oil pipe is sleeved outside the first material pipe; a plurality of first positioning supports which are distributed at equal intervals are connected between the material conveying pipe body and the inner heat conducting oil pipe, each first positioning support comprises at least three first positioning columns, each first positioning column is a triangular prism, a hollow shaft motor is connected outside the second material pipe, and a temperature sensor is arranged in the material conveying pipe body; a plurality of second positioning supports which are distributed at equal intervals are connected between the first material pipe and the outer heat conducting oil pipe, each second positioning support comprises at least three second positioning columns, and one ends of the second positioning columns are connected with the outer heat conducting oil pipe through balls. The asphalt heating device can uniformly heat asphalt, and in addition, the material conveying pipe body can be turned over, so that the fluidity of the asphalt can be further improved, and the asphalt can be smoothly conveyed in the conveying pipe.
Description
Technical Field
The invention relates to an asphalt material pipe, and particularly discloses an anti-fouling and anti-blocking asphalt conveying pipe.
Background
The conveying pipe is used for conveying liquid or liquid-solid mixed material with fluidity, the asphalt is in a solid state at normal temperature, and the asphalt is in a liquid-solid mixed state after being heated. The asphalt is a black-brown complex mixture composed of hydrocarbons with different molecular weights and non-metallic derivatives thereof, is one of high-viscosity organic liquids, and is mainly used for industries such as coatings, plastics, rubbers and the like and paving.
The asphalt needs to reach a certain temperature when being transported in the pipeline, otherwise, the solid asphalt can not be transported in the pipeline. Among the prior art, in order to ensure that pitch can transmit at the pipeline, be provided with heating structure outside the pipeline, thereby heat the pipeline through heating structure and make pitch present certain mobility, but this kind of heating structure can only heat the pitch that is close to the pipeline wall, and the pitch at pipeline center need just can obtain heat energy through marginal pitch transmission, the easy caking that takes place of pitch around the pipeline center, the caking can block up the pipeline, even do not agglomerate, the not enough pitch of mobility can the adhesion at pipeline inner wall and form the dirt, hinder the transmission of follow-up pitch.
Disclosure of Invention
Based on this, it is necessary to provide a pitch conveyer pipe that anti-soil was prevented stifled to prior art problem, can carry out even efficient heating to intraductal pitch, can effectively avoid the pitch caking to block up, can avoid the dirt to gather in intraductal simultaneously.
In order to solve the problems of the prior art, the invention discloses an anti-fouling and anti-blocking asphalt conveying pipe which comprises a conveying pipe body, wherein an inner heat conduction oil pipe is arranged in the conveying pipe body, the conveying pipe body comprises a first material pipe and a second material pipe which are communicated, and an outer heat conduction oil pipe is sleeved outside the first material pipe;
a plurality of first positioning supports which are distributed at equal intervals are connected between the material conveying pipe body and the inner heat conducting oil pipe, each first positioning support comprises at least three first positioning columns, each first positioning column is a triangular prism, the material conveying pipe body and the inner heat conducting oil pipe are respectively and fixedly connected with two end faces of the corresponding first positioning column, a hollow shaft motor is connected outside the second material pipe, a temperature sensor is arranged in the material conveying pipe body, and the temperature sensor is fixed on the first positioning supports;
a sealing bearing is connected between the second material pipe and the outer heat conduction oil pipe, a plurality of second positioning supports which are distributed at equal intervals are connected between the first material pipe and the outer heat conduction oil pipe, each second positioning support comprises at least three second positioning columns, one ends of the second positioning columns are fixedly connected with the first material pipe, and the other ends of the second positioning columns are connected with the outer heat conduction oil pipe through balls.
Further, the material conveying pipe body, the inner heat conduction oil pipe and the outer heat conduction oil pipe are carbon steel seamless pipes.
Further, the second material pipe is covered with a first heat preservation layer.
Furthermore, a yielding through hole is formed in the first positioning column.
Furthermore, the abdicating through hole is a round hole with the diameter D, and D is more than or equal to 15mm and less than or equal to 30 mm.
Furthermore, a second heat-insulating layer covers the outer heat-conducting oil pipe.
Furthermore, a strengthening layer is arranged on one side of the second heat-insulating layer, which is far away from the outer heat-conducting oil pipe.
Furthermore, the strengthening layer is a metal mesh layer.
Furthermore, a protective layer is arranged on one side of the strengthening layer, which is far away from the second heat-insulating layer.
The invention has the beneficial effects that: the invention discloses an anti-fouling and anti-blocking asphalt conveying pipe, wherein heat-conducting oil pipes are arranged at the inner and outer special positions of a conveying pipe body, so that asphalt at the center and the edge of the conveying pipe body can be uniformly heated, the high-efficiency heating effect of most of asphalt in the conveying pipe body can be ensured, the asphalt is effectively prevented from being blocked, dirt formed due to insufficient asphalt flowability is prevented from accumulating in the conveying pipe body, in addition, the conveying pipe body is also arranged to be capable of overturning, the asphalt flowability can be further improved, and the asphalt can be smoothly conveyed in the conveying pipe.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic cross-sectional view taken along line A-A' of FIG. 1.
Fig. 3 is a schematic structural view of the inner heat-conducting oil pipe and the first positioning bracket in the invention.
The reference signs are: the heat insulation pipe comprises a material conveying pipeline 10, a first material pipe 11, a second material pipe 12, a first heat insulation layer 121, a first positioning support 13, a first positioning column 131, a yielding through hole 1311, a hollow shaft motor 14, a temperature sensor 15, an inner heat conduction oil pipe 20, an outer heat conduction oil pipe 30, a sealing bearing 31, a second positioning support 32, a second positioning column 321, a ball 3211, a second heat insulation layer 33, a reinforcing layer 34 and a protective layer 35.
Detailed Description
For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.
Refer to fig. 1 to 3.
The embodiment of the invention discloses an anti-fouling and anti-blocking asphalt conveying pipe, which comprises a conveying pipe body 10, wherein an inner heat conduction oil pipe 20 is arranged in the conveying pipe body 10, a conveying cavity for asphalt circulation is formed between the conveying pipe body 10 and the inner heat conduction oil pipe 20, an inner heat conduction oil cavity for heat conduction oil circulation is formed in the inner heat conduction oil pipe 20, the conveying pipe body 10 comprises a first material pipe 11 and a second material pipe 12 which are communicated, the first material pipe 11 and the second material pipe 12 are of an integrally formed structure, the length of the first material pipe 11 is greater than that of the second material pipe 12, asphalt enters from the first material pipe 11 and is output from the second material pipe 12, an outer heat conduction oil pipe 30 is sleeved outside the first material pipe 11, and an outer heat conduction oil cavity for heat conduction oil circulation is formed between the outer heat conduction oil pipe;
a plurality of first positioning brackets 13 which are distributed at equal intervals along the advancing direction of asphalt are connected between the conveying pipe body 10 and the inner heat-conducting oil pipe 20, the structure between the conveying pipe body 10 and the inner heat-conducting oil pipe 20 can be effectively stabilized, each first positioning bracket 13 comprises at least three first positioning columns 131 which surround the same center of the inner heat-conducting oil pipe 20, each first positioning column 131 is a triangular prism, the conveying pipe body 10 and the inner heat-conducting oil pipe 20 are respectively and fixedly connected with two end faces of the first positioning column 131, the tip formed on two side faces of the first positioning column 131 is opposite to the inlet of the conveying pipe body 10, asphalt is flushed to the tip of the first positioning column 131 during conveying, and is shunted after passing through the tip, so that the asphalt can be effectively prevented from being blocked by the first positioning column 131 during conveying, a hollow shaft motor 14 is connected outside the second material pipe 12, the hollow shaft motor 14 can drive the conveying pipe body 10 to rotate, the inner heat-conducting oil, a temperature sensor 15 is arranged in the conveying pipe body 10, the temperature sensor 15 is fixed on the first positioning support 13, and the circulation speed of hot oil in the inner heat-conducting oil pipe 20 and the outer heat-conducting oil pipe 30 is controlled according to the temperature detected by the temperature sensor 15, so that the temperature of asphalt in the conveying pipe body 10 is adjusted;
a sealing bearing 31 is connected between the second material pipe 12 and the outer heat conducting oil pipe 30, when the second material pipe 12 rotates relative to the outer heat conducting oil pipe 30, the sealing bearing 31 can effectively prevent the pipeline structure from being damaged, a plurality of second positioning brackets 32 are connected between the first material pipe 11 and the outer heat conducting oil pipe 30 and are distributed at equal intervals along the advancing direction of asphalt, the structure between the first material pipe 11 and the outer heat conducting oil pipe 30 can be effectively stabilized, each second positioning bracket 32 comprises at least three second positioning columns 321 surrounding the same center of the material conveying pipe body 10, one end of each second positioning column 321 is fixedly connected with the first material pipe 11, the other end of each second positioning column 321 is connected with the outer heat conducting oil pipe 30 through a ball 3211, when the first material pipe 11 rotates relative to the outer heat conducting oil pipe 30, the ball 3211 can effectively convert the sliding friction between the second positioning columns 321 and the outer heat conducting oil pipe 30 into rolling, the second positioning pillar 321 or the outer heat-conducting oil pipe 30 can be effectively prevented from being damaged.
Asphalt is transported in conveying pipe body 10, interior heat conduction oil pipe 20 and the heat conduction oil that circulates in outer heat conduction oil pipe 30, can heat the asphalt evenly high-efficiently through inside and outside heat conduction oil, ensure the mobility at each position pitch, it rotates for outer heat conduction oil pipe 30 to drive the conveying pipeline through hollow shaft motor 14, pitch rolls in the conveying pipeline, can effectively avoid the pitch caking to take place to block up, and then avoid the conveying to be difficult and smooth, can effectively avoid pitch to form the pollutant because of the caking and adhere to gathering at the conveying pipeline inner wall, can ensure conveying pipeline's cleanness. When pitch was transported in first material pipe 11, can obtain the efficient heating effect of inside and outside intensification, pitch was when the second material was said and is transported, and interior heat conduction oil pipe 20 can continue to heat pitch, can effectively avoid pitch to agglomerate in short distance second material is said and is blockked.
In this embodiment, the feeding tube body 10, the inner heat transfer oil pipe 20 and the outer heat transfer oil pipe 30 are carbon steel seamless pipes.
In this embodiment, the second material pipe 12 is covered with the first heat preservation layer 121, preferably, the first heat preservation layer 121 is an asbestos layer or a polyurethane foam layer, the asphalt is heated in the first material pipe 11 and then is output from the second material pipe 12, and the first heat preservation layer 121 can effectively prevent the asphalt in the second material pipe 12 from being cooled too much and blocking due to agglomeration.
In this embodiment, be equipped with in first positioning column 131 and let a position through-hole 1311, set up and let a position through-hole 1311 and supply pitch granule to pass through, first positioning column 131 hinders pitch and rolls when can effectively avoiding the conveying pipeline rotatory.
Based on the embodiment, the abdicating through hole 1311 is a round hole with the diameter D, D is larger than or equal to 15mm and smaller than or equal to 30mm, the diameter of fine-particle asphalt is 9.5-13.2 mm, the diameter of medium-particle asphalt is 16-19 mm, and the abdicating through hole 1311 can be used for the fine-particle or medium-particle asphalt concrete to pass through, so that the rolling effect of the asphalt in the conveying pipe can be effectively improved.
In this embodiment, the outer heat conduction oil pipe 30 is covered with the second insulating layer 33, and preferably, the second insulating layer 33 is an asbestos layer or a polyurethane foam layer, so that heat dissipation in the outer heat conduction oil pipe 30 can be effectively avoided, and the utilization rate of heat energy can be effectively improved, thereby saving energy.
Based on the above embodiment, the side of the second insulating layer 33 away from the outer heat conducting oil pipe 30 is provided with the strengthening layer 34, and the firmness of the structure of the outer heat conducting oil pipe 30 can be improved through the strengthening layer 34.
Based on the above embodiment, the reinforcing layer 34 is a metal mesh layer, and the stability of the structure of the outer heat conduction oil pipe 30 can be effectively improved by the metal mesh layer.
Based on the above embodiment, the side of the reinforcing layer 34 away from the second insulating layer 33 is provided with the protective layer 35, and preferably, the protective layer 35 is a rubber layer.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. The anti-fouling and anti-blocking asphalt conveying pipe is characterized by comprising a conveying pipe body (10), wherein an inner heat conduction oil pipe (20) is arranged in the conveying pipe body (10), the conveying pipe body (10) comprises a first material pipe (11) and a second material pipe (12) which are communicated, and an outer heat conduction oil pipe (30) is sleeved outside the first material pipe (11);
a plurality of first positioning supports (13) which are distributed at equal intervals are connected between the material conveying pipe body (10) and the inner heat conducting oil pipe (20), each first positioning support (13) comprises at least three first positioning columns (131), each first positioning column (131) is a triangular prism, the material conveying pipe body (10) and the inner heat conducting oil pipe (20) are fixedly connected with two end faces of each first positioning column (131), a hollow shaft motor (14) is connected outside the second material pipe (12), a temperature sensor (15) is arranged in the material conveying pipe body (10), and the temperature sensor (15) is fixed on the first positioning supports (13);
a sealing bearing (31) is connected between the second material pipe (12) and the outer heat conduction oil pipe (30), a plurality of second positioning supports (32) which are distributed at equal intervals are connected between the first material pipe (11) and the outer heat conduction oil pipe (30), each second positioning support (32) comprises at least three second positioning columns (321), one ends of the second positioning columns (321) are fixedly connected with the first material pipe (11), and the other ends of the second positioning columns (321) are connected with the outer heat conduction oil pipe (30) through balls (3211).
2. An anti-fouling and anti-blocking asphalt conveying pipe according to claim 1, characterized in that the conveying pipe body (10), the inner heat-conducting oil pipe (20) and the outer heat-conducting oil pipe (30) are carbon steel seamless pipes.
3. An anti-fouling and anti-blocking asphalt conveying pipe according to claim 1, characterized in that the second material pipe (12) is covered with a first heat-insulating layer (121).
4. An anti-fouling and anti-blocking asphalt conveying pipe according to claim 1, characterized in that a relief through hole (1311) is formed in the first positioning column (131).
5. The anti-fouling and anti-plugging asphalt conveying pipe according to claim 4, characterized in that the abdicating through hole (1311) is a round hole with a diameter D, and D is more than or equal to 15mm and less than or equal to 30 mm.
6. An anti-fouling and anti-blocking asphalt conveying pipe according to claim 1, characterized in that the outer heat conducting oil pipe (30) is covered with a second insulating layer (33).
7. An anti-fouling and anti-blocking asphalt conveying pipe according to claim 6, characterized in that a strengthening layer (34) is arranged on one side of the second heat insulation layer (33) far away from the outer heat conduction oil pipe (30).
8. An anti-fouling and anti-plugging asphalt conveying pipe according to claim 7, characterized in that the strengthening layer (34) is a metal mesh layer.
9. An anti-fouling and anti-blocking asphalt conveying pipe according to claim 8, characterized in that a protective layer (35) is arranged on one side of the strengthening layer (34) far away from the second insulating layer (33).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911199675.2A CN111059367B (en) | 2019-11-29 | 2019-11-29 | Anti-fouling and anti-blocking asphalt conveying pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911199675.2A CN111059367B (en) | 2019-11-29 | 2019-11-29 | Anti-fouling and anti-blocking asphalt conveying pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111059367A CN111059367A (en) | 2020-04-24 |
| CN111059367B true CN111059367B (en) | 2021-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911199675.2A Active CN111059367B (en) | 2019-11-29 | 2019-11-29 | Anti-fouling and anti-blocking asphalt conveying pipe |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117006343B (en) * | 2023-09-28 | 2023-12-01 | 甘肃金利通碳材料科技有限公司 | Heat-accumulating heat-preserving asphalt conveying pipeline |
Citations (7)
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|---|---|---|---|---|
| DE4438139A1 (en) * | 1993-10-30 | 1995-05-04 | Dunlop Automotive Composites U | Thermally heatable line |
| CN200965134Y (en) * | 2006-07-07 | 2007-10-24 | 沈阳铝镁设计研究院 | Heating medium oil or steam temperature-guiding pipeline |
| EP2451244A1 (en) * | 2010-11-03 | 2012-05-09 | Nexans | Direct electrical heating flow system |
| CN104315344A (en) * | 2014-10-21 | 2015-01-28 | 中山市拓维电子科技有限公司 | Combined asphalt delivery pipe |
| CN207812234U (en) * | 2018-01-17 | 2018-09-04 | 四川河森天运股份有限公司 | Rapid and uniform heating formula asphalt tank |
| CN208107449U (en) * | 2018-04-13 | 2018-11-16 | 山东茂盛管业有限公司 | Nanocomposite high temperature steam pipe |
| CN209622240U (en) * | 2018-12-28 | 2019-11-12 | 深圳市晶诚高科技有限公司 | A kind of asphalt delivery heat traced hoses |
-
2019
- 2019-11-29 CN CN201911199675.2A patent/CN111059367B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4438139A1 (en) * | 1993-10-30 | 1995-05-04 | Dunlop Automotive Composites U | Thermally heatable line |
| CN200965134Y (en) * | 2006-07-07 | 2007-10-24 | 沈阳铝镁设计研究院 | Heating medium oil or steam temperature-guiding pipeline |
| EP2451244A1 (en) * | 2010-11-03 | 2012-05-09 | Nexans | Direct electrical heating flow system |
| CN104315344A (en) * | 2014-10-21 | 2015-01-28 | 中山市拓维电子科技有限公司 | Combined asphalt delivery pipe |
| CN207812234U (en) * | 2018-01-17 | 2018-09-04 | 四川河森天运股份有限公司 | Rapid and uniform heating formula asphalt tank |
| CN208107449U (en) * | 2018-04-13 | 2018-11-16 | 山东茂盛管业有限公司 | Nanocomposite high temperature steam pipe |
| CN209622240U (en) * | 2018-12-28 | 2019-11-12 | 深圳市晶诚高科技有限公司 | A kind of asphalt delivery heat traced hoses |
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| CN111059367A (en) | 2020-04-24 |
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Address after: 523981 No.5, Shihua Third Road, Shatian Town, Dongguan City, Guangdong Province Applicant after: Guangdong Chengtai Investment Group Co., Ltd Address before: 523981 Guangdong province Dongguan city Sha Tin Town of Humen port three road Milton Petrochemical Fine Chemical Industry Park Applicant before: GUANGDONG CHENGTAI INVESTMENT Co.,Ltd. |
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