CN210171734U - Vacuum powder spraying device for inner wall anticorrosive coating of petroleum pipeline - Google Patents
Vacuum powder spraying device for inner wall anticorrosive coating of petroleum pipeline Download PDFInfo
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- CN210171734U CN210171734U CN201920450182.0U CN201920450182U CN210171734U CN 210171734 U CN210171734 U CN 210171734U CN 201920450182 U CN201920450182 U CN 201920450182U CN 210171734 U CN210171734 U CN 210171734U
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Abstract
The utility model relates to the technical field of powder spraying of pipelines, in particular to a vacuum powder spraying device of an anticorrosive coating on the inner wall of a petroleum pipeline, which comprises a front conveyor belt and a rear conveyor belt which are arranged side by side, the lower ends of the conveyor belts are arranged on a Y-axis track in a sliding way through a conveying base, a front support is arranged at the front sides of the two conveyor belts, a rear support is arranged at the rear side of the conveyor belts, the two conveyor belts are respectively provided with a sand blasting device, a sand blowing device, a powder spraying device, a heating device and a cooling device from left to right, because of a plurality of stations arranged on the conveyor belts, the spraying process of sand blasting, impurity removal, sand blowing, impurity removal, powder spraying, uniform powder adsorption and coating solidification can be sequentially completed when the pipeline moves from left to right, the whole process is automatically completed, the spraying efficiency is high, the quality is high, sand, air pollution is reduced, the whole conveyor belt only needs to be completed by people, and labor intensity is reduced.
Description
Technical Field
The utility model relates to a powder spraying technical field of pipeline, concretely relates to vacuum powder spraying device of petroleum pipeline inner wall anticorrosive coating.
Background
The petroleum pipeline inner wall spraying technology starts in the United states, is originally proposed as pipeline inner wall anticorrosion, and has great damage to metal pipelines due to corrosion, because one pipeline has advanced external anticorrosion technology no matter how good an external coating is, and if internal anticorrosion is not carried out, the pipeline inner wall anticorrosion technology is also an effective means for improving pipeline transportation amount, and countries such as the United states begin the research of pipeline inner wall anticorrosion in the last 70 years, so that a great amount of manpower and material resources are invested, and a great amount of anticorrosive coatings of metal pipelines are researched and applied. One of the methods is an electrostatic spraying method, which is developed along with the advent of epoxy powder coating, and the electrostatic spraying method is not used for an epoxy resin powder internal coating technology and an epoxy resin liquid internal coating technology, and has the characteristics of high coating quality, no need of a high-heat solvent, capability of recycling over-sprayed powder and the like, and has the advantages of low cost, simple process, easiness in realization of automation, and no atmospheric pollution.
The construction process of the electrostatic spraying method comprises the steps of cleaning the inner surface of a pipeline by a sand blasting method, spraying the inner surface of the pipeline to be nearly white, and then blowing steel sand and dust clean by high-pressure air. And spraying charged powder from the nozzle, adsorbing the powder onto the inner surface of the pipeline, heating and rotating the pipeline to uniformly melt the powder on the inner wall, and finally cooling the pipeline to solidify the coating.
Although the electrostatic spraying method has more advantages, no integrated equipment is available for automatically completing the whole spraying process technology, the pipeline needs to be rotated and heated at the same time, then needs to be cooled, and is manually moved, so that the pipeline is inconvenient to move, the automatic spraying technology is not achieved, more manpower is needed for operation, the cost is relatively increased, and the spraying efficiency is low.
SUMMERY OF THE UTILITY MODEL
In view of the technical problem who exists among the prior art, the utility model provides a vacuum powder spraying device of petroleum pipeline inner wall anticorrosive coating for the electrostatic spraying technique integrates, the automation, reduces intensity of labour, accelerates to paint efficiency, guarantees the higher spraying quality of petroleum pipeline inner wall.
In order to realize the technical purpose, the utility model discloses a technical scheme as follows:
the utility model provides a vacuum powder spraying device of petroleum pipeline inner wall anticorrosive coating, including two conveyer belts in front and back that set up side by side, be equipped with the pipeline holder on the conveyer belt, the lower extreme of conveyer belt passes through conveying base slidable mounting on Y axle track, be equipped with the locking piece of locking conveyer belt on the Y axle track, be equipped with the fore-stock in the front side of two conveyer belts, rear support is equipped with at the rear side of conveyer belt, fore-stock and after-poppet erect on conveying the base equally, two conveyer belts are equipped with sand blasting unit from a left side to the right side respectively, blow sand device, powder spraying device, heating device and cooling device.
The sand blasting device comprises a sand blasting gun and a pipe blocking device, the sand blasting gun is installed on a front support, the pipe blocking device is installed on a rear support, the sand blasting gun and the pipe blocking device are symmetrically designed, the pipe blocking device comprises an L-shaped telescopic support and a rubber check ring, the L-shaped telescopic support is installed on a transmission base, and the rubber check ring is installed at the upper end of the L-shaped telescopic support opposite to the diameter of a pipeline; the sand blowing device comprises a high-pressure air gun and a recovery cylinder, wherein the high-pressure air gun is arranged on the front bracket, and the recovery cylinder is arranged on the rear bracket; the powder spraying device comprises a powder spray gun and an air pump, the powder spray gun is arranged on the front support, the end of the powder spray gun is connected with a powder supply machine, and the air pump head of the air pump is arranged on the rear support; the heating device comprises a clamping and rotating mechanism and a heating pipeline, wherein the clamping and rotating mechanism mainly comprises a jacking cylinder, a driving motor and a clamping stop block, the jacking cylinder is respectively fixed at the symmetrical positions of the front bracket and the rear bracket, the driving motor is fixed at the front end of the jacking cylinder, the clamping stop block is fixed at the front end of an output shaft of the driving motor, and the driving motor is arranged on the motor bracket through a sliding block; a heating pipeline is arranged right below the clamping and rotating mechanism, and one end of the heating pipeline is connected with a pipeline heater; the cooling device comprises a cold air pipeline erected between the two conveyor belts, and one end of the cold air pipeline is connected to the air conditioner.
By adopting the design, compared with the prior art, the beneficial effects are that:
1. because the conveying belt is adopted to convey the petroleum pipeline, the vacuum powder spraying technology of the inner wall of the pipeline can automatically complete the electrostatic spraying technology in the form of assembly line work, and the conveying base and the Y-axis track are combined to enable the relative positions of the two conveying belts to be changed, so that the petroleum pipeline conveying device is suitable for petroleum pipeline placement of various length specifications.
2. Because a plurality of stations that set up on the conveyer belt for the pipeline is in proper order through sand blasting unit when moving from a left side to the right side, sand blowing device, the powder spraying device, heating device and cooling device, can accomplish the sandblast in proper order and remove impurity, sand blowing and impurity removing, the powder spraying, the powder adsorbs evenly, the spraying technology of coating solidification, whole process is accomplished automatically, spraying efficiency is fast, spraying quality is high, can also retrieve the sand that washs the pipeline inner wall and retrieve unnecessary spraying powder, air pollution is reduced, and whole conveyer belt only needs supplementary the completion of people, and the labor intensity is reduced.
Further inject, the diameter of the recovery cylinder is greater than the diameter of the pipeline, the inlet channel of the recovery cylinder faces to the sand discharge channel of the pipeline, the recovery cylinder is a corrugated pipeline, and the recovery cylinder is installed on the conveying base by the supporting frame. The larger the recovery cylinder is, the more sand can be gathered as much as possible when the recovery cylinder faces to the pipe orifice of the petroleum pipeline, and then the sand is recovered in a centralized manner, so that more sand is prevented from flying into the air.
Further inject, the tight cylinder in top is two effect cylinders, and there is the telescopic shaft balancing piece double action cylinder's front end, driving motor passes through installation piece detachable and connects on the telescopic shaft balancing piece, and double effect cylinder is external to have the air supply unit, and air supply unit, driving motor are even with the control host computer electricity. Adopt the cylinder to jack up driving motor, high accuracy, high efficiency, cost of maintenance is low, the tight pipeline of clamp that both ends work together can be tight for the motor can be more steady safer rotatory petroleum pipeline in the pivoted, make the pipeline inner wall of spraying powder rotate down on the internal surface that the powder can be quick, even distribution at a high speed.
Further inject, still be equipped with the pipeline conveyer belt of slope in the rightmost side of conveyer belt, pipeline conveyer belt's last termination is equipped with buffer and baffle at conveyer belt right-hand member, lower extreme. The blanking is carried out after all the working procedures of the petroleum pipeline are finished, the pipeline conveying belt is arranged to enable the pipeline to directly roll from a high place, the buffer area is arranged below the pipeline conveying belt to absorb shock, and the baffle plate stops the stroke of the pipeline rolling.
Further, the pipeline conveying belt is made of rubber, so that shock absorption and noise reduction are realized.
Further limiting, a heat insulation plate is arranged between the heating pipeline and the cold air pipeline, the heat insulation plate is made of porous materials and separates a heating area from a cooling area, and the heating effect and the cooling effect are better.
Drawings
FIG. 1 is a schematic top view of a vacuum powder spraying apparatus for an anticorrosive coating on an inner wall of a petroleum pipeline;
FIG. 2 is a schematic view of a portion of the blasting apparatus of FIG. 1 in the direction A;
FIG. 3 is a schematic view of a portion of the sand blower of FIG. 1 in the direction B;
fig. 4 is a partial structural view of the heating apparatus of fig. 1 in the direction of C.
Detailed Description
In order to make the technical solution of the present invention more comprehensible to those skilled in the art, the present invention is further described with reference to the accompanying drawings and examples.
If fig. 1, fig. 2, fig. 3, the vacuum powder spraying device of a petroleum pipeline inner wall anticorrosive coating shown in fig. 4, including two conveyer belts 1 in front and back that set up side by side, be equipped with pipeline holder 11 on conveyer belt 1, pipeline holder 11 is a semicircle staple bolt, the wherein one end of semicircle staple bolt utilizes the bolt fastening at conveyer belt 1 upper plane, the other end articulates at conveyer belt 1 upper plane with the hinge, the arch face of semicircle staple bolt is upwards, just not hard up the bolt when needs fixed pipeline 3 at every turn, pipeline 3 is put into back locking, pipeline 3 just can be along with the conveyer belt is moved towards the right side together like this, conveyer belt 1 is the best metal class material, not plastics, can conveniently fix the semicircle staple bolt and bear the weight of pipeline. The lower extreme of conveyer belt passes through conveying base 12 slidable mounting on Y axle track 2, be equipped with the locking piece of locking conveyer belt 1 on Y axle track 2, two conveyer belts 1 can be for on Y axle track 2 on the Y direction mutual displacement, so that adjust the interval between the two, make the pipeline 3 of different length can be fixed to conveyer belt 1 top, remove the back at every turn, the locking piece is about fixed conveying base 12, avoid two conveyer belts 1 to take place relative displacement when using, the locking piece is preferably locking bolt, be equipped with the bar hole on Y axle track 2, directly tighten the locking bolt on conveying base 12 after removing conveying base 12 at every turn, make conveying base 12 and Y axle track 2's relative position fix. The front supports 4 are arranged on the front sides of the two conveyor belts 1, the rear supports 5 are arranged on the rear sides of the conveyor belts 1, the front supports 4 and the rear supports 5 are also erected on the conveying base 12, the positions of the front supports 4 and the rear supports 5 are adjusted along with the conveyor belts 1, the relative positions of the front supports and the conveyor belts 1 are guaranteed to be unchanged, and the two conveyor belts 1 are respectively provided with a sand blasting device 6, a sand blowing device 7, a powder spraying device 8, a heating device 9 and a cooling device 10 from left to right.
As shown in fig. 2, the sand blasting device 6 comprises a sand blasting gun 61 and a pipe blocking device 62, the sand blasting gun 61 is mounted on the front support 4, the pipe blocking device 62 is mounted on the rear support 5, the two are designed symmetrically, the pipe blocking device 62 is composed of an L-shaped telescopic support 621 and a rubber retaining ring 622, the L-shaped telescopic support 621 is mounted on the conveying base 12, and the rubber retaining ring 622 is mounted at the upper end of the L-shaped telescopic support 621 opposite to the diameter of the pipeline 3. As shown in fig. 3, the sand blowing device 7 includes a high pressure air gun 71 and a recovery barrel 72, the high pressure air gun 71 is installed on the front bracket 4, the recovery barrel 72 is installed on the rear bracket 5, a semi-arc groove is formed in the rear bracket 5 at the position where the recovery barrel 72 is installed, a cover plate 73 is covered on the semi-arc groove, an elastic gasket is arranged below the cover plate 73, the recovery barrel 72 is placed in the semi-arc groove and passes through the upper cover plate 73 of the rear cover, the left side of the cover plate 73 is connected with the upper top surface of the rear bracket 5 by a hinge, and thus the cover plate 73 can be turned over and uncovered. As shown in fig. 4, the powder spraying apparatus 8 includes a powder spray gun 81 and an air pump 82, the powder spray gun 81 is mounted on the front bracket 4, the end of the powder spray gun 81 is connected to a powder feeder, the air pump 82 has an air pump head mounted on the rear bracket 5, and the rear end of the air pump 82 is connected to a paint recovery storage box. The heating device 9 comprises a clamping rotating mechanism 91 and a heating pipeline 92, wherein the clamping rotating mechanism 91 mainly comprises a jacking cylinder 911, a driving motor 912 and a clamping stop block 913, the jacking cylinders 911 are respectively fixed on the symmetrical positions of the front support 4 and the rear support 5 through L supports, the driving motor 912 is fixed at the front end of the jacking cylinder 911, the clamping stop block 913 is fixed at the front end of an output shaft of the driving motor 912, and the driving motor 912 is installed on the front support and the rear support through a sliding block 914. A heating pipe 92 is provided directly below the clamping and rotating mechanism 91, and one end of the heating pipe 92 is connected to a pipe heater. The cooling device 10 comprises a cold air pipeline erected between two conveyor belts 1, the cold air pipeline is arranged right below a petroleum pipeline 3, one end of the cold air pipeline is connected to an air conditioner, and in order to avoid the temperature interference between a heating pipeline 92 and a cooling pipeline, a heat insulation board 13 made of porous materials, such as a foam heat insulation board and a fiber heat insulation board, is arranged between the heating pipeline 92 and the cooling pipeline, and has the advantages of low cost, light weight and good heat insulation and cold insulation effects. Preferably, in order to save the space of equipment, the heating device 9 is directly replaced by an integrated pipeline heater which is directly placed under the petroleum pipeline 3 of the corresponding station, and the model of the finished pipeline heater is preferably an ash bucket electric heater.
Preferably, the diameter of the recovery cylinder 72 is larger than that of the pipeline 3, the inlet passage of the recovery cylinder 72 faces the sand discharge passage of the pipeline 3, and the recovery cylinder 72 is a corrugated pipeline and is mounted on the conveying base 12 by a support frame.
The jacking cylinder 911 is a double-acting cylinder, the preferred type is a German FESTO double-acting cylinder, the front end of the double-acting cylinder is provided with a telescopic shaft balance block, the driving motor 912 is detachably connected onto the telescopic shaft balance block through an installation block, the double-acting cylinder is externally connected with an air source device, and the air source device and the driving motor are electrically connected with the control host machine.
An inclined pipeline conveying belt 14 is further arranged on the rightmost side of the conveying belt 1, the upper end of the pipeline conveying belt 14 is connected to the right end of the conveying belt 1, a buffer area and a baffle are arranged at the lower end of the conveying belt, when the petroleum pipeline 3 is subjected to blanking after all working procedures are finished, the pipeline conveying belt 14 is arranged to enable the pipeline to directly roll down from a high position, the buffer area is arranged below the pipeline conveying belt to absorb shock, and the baffle stops the stroke of the pipeline rolling down; preferably, in order to avoid the defects of generating larger noise when the pipeline 3 is inclined and rolled off, avoiding colliding with a pit and the like, the pipeline conveying belt 14 is made of rubber, and not only can absorb shock, but also can reduce noise. The pipe conveyor 14 is made of rubber, so that shock absorption and noise reduction are realized.
When the device is used, the conveyor belt 1 is started, the conveyor belt 1 intermittently stops constant-speed motion under the action of the control host when being conveyed, the surface of the inner wall of the pipeline 3 is cleaned by a sand blasting method when the conveyor belt 1 is stopped for the first time, sand is blasted from the front side of the pipeline 3 into the pipeline 3 by using a sand blasting gun 61 during sand blasting, and the other end of the pipeline 3 is closed by a pipe blocking device 62 to form a closed sand blasting chamber; when the second time of stopping is carried out, the high-pressure air gun 71 is used for blowing air from the front side end of the pipeline 3, the cleaning sand blown in the first step is blown out of the pipeline 3, and the recovery cylinder 72 recovers the sand at the other end of the pipeline to avoid dust raising; during the third stop, the powder spray gun 81 starts to operate, powder is sprayed into the pipeline 3 at high speed and high pressure, the air extractor 82 operates at the other end of the pipeline 3, and during powder spraying, under the action of a strong electrostatic field and the attraction of the air extractor 82, the powder with charges sprayed out of the powder spray gun 81 is immediately adsorbed by the inner surface of the pipeline 3 and is quickly distributed on the inner surface; next, the pipeline 3 moves to a position right above the heating device 9 and stops, and is stopped for the third time, at this time, the control host starts the jacking cylinder 911 and the driving motor 912 to drive the pipeline 3 to rotate, and the pipeline 3 rotates while heating, so that the powder on the inner wall is uniformly melted; and when the last seat is stopped, the cooling station is reached, and the cold air pipeline 10 directly cools the petroleum pipeline 3, so that the melted powder coating on the inner wall of the petroleum pipeline 3 is quickly solidified, and the powder spraying of the inner wall of the petroleum pipeline 3 is completed. So circulate, the workman carries out the material loading with pipeline 3 at the leftmost side of conveyer belt fixedly, locks with the semicircle staple bolt, at the 9 stations of heating device, opens the semicircle staple bolt, lets driving motor 912 drive pipeline 3 rotatory, directly puts pipeline 3 after rotatory and continues the conveying again, need not tighten the semicircle staple bolt, makes things convenient for the pipeline directly to cool off the back and goes up unloading from pipeline conveyer belt 14.
The above is right the utility model provides a vacuum powder spraying device of petroleum pipeline inner wall anticorrosive coating introduces in detail, and the description of specific embodiment is only used for helping understanding the utility model discloses a method and its core thought. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (6)
1. The utility model provides a vacuum powder spraying device of petroleum pipeline inner wall anticorrosive coating which characterized in that: the device comprises a front conveyor belt and a rear conveyor belt which are arranged side by side, a pipeline clamp holder is arranged on the conveyor belts, the lower ends of the conveyor belts are slidably arranged on a Y-axis track through a conveying base, a locking piece for locking the conveyor belts is arranged on the Y-axis track, front supports are arranged on the front sides of the two conveyor belts, a rear support is arranged on the rear side of the conveyor belts, the front supports and the rear support are also erected on the conveying base, a sand blasting device, a sand blowing device, a powder spraying device, a heating device and a cooling device are respectively arranged on the two conveyor belts from left to right,
the sand blasting device comprises a sand blasting gun and a pipe blocking device, the sand blasting gun is arranged on a front support, the pipe blocking device is arranged on a rear support, the sand blasting gun and the pipe blocking device are symmetrically designed, the pipe blocking device comprises an L-shaped telescopic support and a rubber check ring, the L-shaped telescopic support is arranged on a transmission base, the rubber check ring is arranged at the upper end of the L-shaped telescopic support opposite to the diameter of a pipeline,
the sand blowing device comprises a high-pressure air gun and a recovery cylinder, the high-pressure air gun is arranged on the front bracket, the recovery cylinder is arranged on the rear bracket,
the powder spraying device comprises a powder spray gun and an air pump, the powder spray gun is arranged on the front bracket, the end of the powder spray gun is connected with a powder supply machine, the air pump head of the air pump is arranged on the rear bracket,
the heating device comprises a clamping and rotating mechanism and a heating pipeline, wherein the clamping and rotating mechanism mainly comprises a jacking cylinder, a driving motor and a clamping stop block, the jacking cylinder is respectively fixed at the symmetrical positions of the front bracket and the rear bracket, the driving motor is fixed at the front end of the jacking cylinder, the clamping stop block is fixed at the front end of an output shaft of the driving motor, and the driving motor is arranged on the motor bracket through a sliding block; a heating pipeline is arranged right below the clamping and rotating mechanism, and one end of the heating pipeline is connected with a pipeline heater;
the cooling device comprises a cold air pipeline erected between the two conveyor belts, and one end of the cold air pipeline is connected to the air conditioner.
2. The vacuum powder spraying device for the petroleum pipeline inner wall anticorrosive coating as claimed in claim 1, wherein: the diameter of a recovery cylinder is larger than that of the pipeline, an inlet channel of the recovery cylinder faces to a sand discharge channel of the pipeline, the recovery cylinder is a corrugated pipeline, and the recovery cylinder is installed on the conveying base through a supporting frame.
3. The vacuum powder spraying device for the petroleum pipeline inner wall anticorrosive coating as claimed in claim 1, wherein: the tight cylinder in top is two effect cylinders, and there is the telescopic shaft balancing piece at two effect cylinders's front end, driving motor passes through installation piece detachable and connects on the telescopic shaft balancing piece, and two effect cylinders are external to have air supply unit, and air supply unit, driving motor are even with the main control system electricity.
4. The vacuum powder spraying device for the petroleum pipeline inner wall anticorrosive coating as claimed in claim 1, wherein: the rightmost side of the conveying belt is also provided with an inclined pipeline conveying belt, and the upper end of the pipeline conveying belt is connected to the right end of the conveying belt, and the lower end of the pipeline conveying belt is provided with a buffer area and a baffle.
5. The vacuum powder spraying device for the petroleum pipeline inner wall anticorrosive coating as claimed in claim 4, wherein: the pipeline conveying belt is made of rubber.
6. The vacuum powder spraying device for the petroleum pipeline inner wall anticorrosive coating as claimed in claim 1, wherein: and a heat insulation plate is arranged between the heating pipeline and the cold air pipeline, and is made of porous materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920450182.0U CN210171734U (en) | 2019-04-03 | 2019-04-03 | Vacuum powder spraying device for inner wall anticorrosive coating of petroleum pipeline |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920450182.0U CN210171734U (en) | 2019-04-03 | 2019-04-03 | Vacuum powder spraying device for inner wall anticorrosive coating of petroleum pipeline |
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| CN210171734U true CN210171734U (en) | 2020-03-24 |
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| CN201920450182.0U Active CN210171734U (en) | 2019-04-03 | 2019-04-03 | Vacuum powder spraying device for inner wall anticorrosive coating of petroleum pipeline |
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| CN113351411A (en) * | 2021-06-15 | 2021-09-07 | 唐为国 | Full-automatic powder and paint coating line for inner wall and outer wall of gray iron straight pipe |
| CN114054263A (en) * | 2020-08-03 | 2022-02-18 | 龚海涛 | Oil applying device for inner wall of welded pipe |
| CN114054264A (en) * | 2020-08-03 | 2022-02-18 | 龚海涛 | Automatic oiling device for welded pipe |
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2019
- 2019-04-03 CN CN201920450182.0U patent/CN210171734U/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114054263A (en) * | 2020-08-03 | 2022-02-18 | 龚海涛 | Oil applying device for inner wall of welded pipe |
| CN114054264A (en) * | 2020-08-03 | 2022-02-18 | 龚海涛 | Automatic oiling device for welded pipe |
| CN114054263B (en) * | 2020-08-03 | 2023-04-07 | 龚海涛 | Oil applying device for inner wall of welded pipe |
| CN114054264B (en) * | 2020-08-03 | 2023-09-26 | 龚海涛 | Automatic oiling device for welded pipe |
| CN113351411A (en) * | 2021-06-15 | 2021-09-07 | 唐为国 | Full-automatic powder and paint coating line for inner wall and outer wall of gray iron straight pipe |
| CN114904684A (en) * | 2022-03-24 | 2022-08-16 | 浙江优亿医疗器械股份有限公司 | Positioning and supporting device of laryngeal mask breather pipe and oil injection transfer printing equipment thereof |
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| GR01 | Patent grant | ||
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Effective date of registration: 20230918 Address after: 710200 Han Village 1st Road, Jinghe Industrial Park, Gaoling District, Xi'an City, Shaanxi Province Patentee after: TANGRONG TUBE-COTE (SHANXI) OIL PIPE COATING Co.,Ltd. Address before: 637100 North Zone of Airport Industrial Park, Gaoping District, Nanchong City, Sichuan Province Patentee before: SICHUAN HILONG PETROLEUM TECHNOLOGY Co.,Ltd. |
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