CN113731955A - Device and method for online removal of oxide scales on inner wall of oil pipe - Google Patents
Device and method for online removal of oxide scales on inner wall of oil pipe Download PDFInfo
- Publication number
- CN113731955A CN113731955A CN202010472724.1A CN202010472724A CN113731955A CN 113731955 A CN113731955 A CN 113731955A CN 202010472724 A CN202010472724 A CN 202010472724A CN 113731955 A CN113731955 A CN 113731955A
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- laser
- oil pipe
- wall
- lens barrel
- cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/0035—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like
- B08B7/0042—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like by laser
Abstract
The invention discloses a device and a method for online removing oxide scales on the inner wall of an oil pipe, wherein the device comprises a laser cleaning head positioned at one end of the oil pipe and an adsorption recoverer positioned at the other end of the oil pipe; the laser cleaning head comprises a translation table positioned at one end of the oil pipe, a rotating lens barrel is arranged on the translation table, a focusing mirror and a laser reflecting mirror are arranged inside the rotating lens barrel, a laser light emitting point is arranged at the front end part of the rotating lens barrel, and a two-dimensional galvanometer system, a laser collimating mirror and a laser are sequentially arranged at the rear end part of the rotating lens barrel; the translation stage realizes horizontal movement through a translation stage driver; the rotating lens barrel rotates through a speed regulating motor, and the speed regulating motor is driven by a motor speed regulating driver. The invention solves the problem of cleaning iron scales and graphite spots in a narrow space of the inner surface of the thickened end of the oil pipe.
Description
Technical Field
The invention relates to the application technology of laser surface cleaning and fiber lasers, in particular to a device and a method for online removing oxide scales on the inner wall of an oil pipe.
Background
When the thickened oil pipe is used in an oil field, iron scales and graphite spots existing on the inner wall of the oil field can cause the phenomenon of oil well pump blockage, and therefore the requirement that the thickened oil pipe needs to remove the iron scales and the graphite spots at the thickened end is provided. The temperature for thickening the pipe end in the on-site thickening process is 1100-1200 ℃, and after thickening, the inner surface of the pipe end has scale through the heat treatment in the subsequent process. The scale part of the inner surface is peeled off in the heat treatment and conveying processes, but is not completely removed, so that the scale part is difficult to remove manually. The thickness of the iron scale is about 0.1 mm-0.4 mm, and is mainly concentrated in the range of 200mm at the pipe end.
The traditional derusting cleaning includes physical derusting cleaning and chemical derusting cleaning. The physical rust removal cleaning is to remove surface rust by means of the action of force and heat on the cleaned surface, and the common physical rust removal cleaning method comprises the following steps: manual rust removal, mechanical polishing, flame rust removal, electric spark rust removal and the like, but the physical rust removal cleaning method has the disadvantages of high labor intensity, low efficiency and incomplete rust removal, and is only suitable for small-amount operation and local surface rust removal. The chemical rust removal cleaning is to utilize the acid solution and the oxide of iron to generate chemical reaction to dissolve and strip a surface rust layer to achieve the aim of rust removal, so the chemical rust removal is also called as acid cleaning rust removal and is commonly used for removing rust of small-sized workpieces and workpieces with complex shapes, the chemical rust removal cleaning efficiency is high, but the chemical rust removal cleaning has trace dissolution loss and hydrogen embrittlement phenomenon on steel, and the environmental pollution is large, so the chemical rust removal cleaning is not beneficial to environmental protection.
Based on the current increasingly strict requirements of environmental protection regulations in China and increasingly stronger awareness of environmental protection and safety of people, the types of chemicals used in industrial production and cleaning become less and less, and physical rust removal is increasingly limited.
With the development of the pulse optical fiber laser technology, the laser surface cleaning technology has been developed greatly, and typical products at home and abroad are as follows: laser cleaning equipment produced by Swedish P-Laser, domestic Ruike, Haifei photon and the like is applied to different industries. However, the applications can only clean the outer surface of a plane and a pipe, the inner wall is cleaned, and only rust spots with the surface thickness of 15 micrometers can be cleaned, and iron scales with strong adhesive force and graphite patches and with the thickness of 0.1 mm-0.4 mm are not used as cleaning objects, wherein the tube diameter of the rust spots is between 100 mm-300 mm.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a device and a method for online removing of iron oxide scales on the inner wall of an oil pipe, and the device and the method are used for solving the problem of cleaning the iron oxide scales and graphite spots in a narrow space on the inner surface of the thickened end of the oil pipe.
In order to achieve the purpose, the invention adopts the following technical scheme:
on one hand, the device for online removing the iron scale on the inner wall of the oil pipe comprises a laser cleaning head and an adsorption recoverer, wherein the laser cleaning head is positioned at one end of the oil pipe;
the laser cleaning head comprises a translation table positioned at one end of the oil pipe, a rotating lens barrel is arranged on the translation table, a focusing mirror and a laser reflecting mirror are arranged inside the rotating lens barrel, a laser light emitting point is arranged at the front end part of the rotating lens barrel, and a two-dimensional galvanometer system, a laser collimating mirror and a laser are sequentially arranged at the rear end part of the rotating lens barrel;
the translation stage realizes horizontal movement through a translation stage driver;
the rotating lens barrel rotates through a speed regulating motor, and the speed regulating motor is driven by a motor speed regulating driver.
Preferably, the laser is a pulse fiber laser, and the pulse fiber laser is provided with a QBH joint.
Preferably, the rotating cylinder is rotated by a support bearing.
Preferably, the adsorption recoverer is provided with a recovery tank.
In another aspect, a method for online removal of scale on the inner wall of an oil pipe comprises the following steps:
1) the laser cleaning head in the device is in butt joint with the steel pipe production and transmission process structure and electricity;
2) conveying the thickened end of the steel pipe to be cleaned to a cleaning working position, and sending a steel pipe cleaning in-place signal;
3) the laser cleaning head receives the signal of the step 2), starts the laser cleaning head to move horizontally and rotate to enter the steel pipe, and reaches a set cleaning position to clean the inner wall of the steel pipe;
4) placing an adsorption recoverer in the device at the other end of the steel pipe, wherein the adsorption recoverer receives the signal of the step 2), starting the adsorption recoverer, and adsorbing smoke, pollution and dust generated by the laser cleaning head in the cleaning process;
5) after cleaning is finished, the laser cleaning head withdraws from the steel pipe and sends a withdrawal completion signal;
6) and the adsorption recoverer receives the signal of the step 5) and retreats from the other end of the steel pipe.
Preferably, the pipe diameter of the steel pipe is between 60mm and 80 mm.
Preferably, the moving distance of the laser cleaning head in the steel pipe, namely the axial depth of the cleaning end is 200 mm-230 mm.
In the technical scheme, the device and the method for online removing of the oxide scale on the inner wall of the oil pipe, provided by the invention, have the following beneficial effects:
1) the laser cleaning is a green and environment-friendly cleaning method, any chemical agent and cleaning solution are not needed, the cleaned waste materials are basically solid powder, the size is small, the laser cleaning device is easy to store and recycle, and the problem of environmental pollution caused by chemical cleaning can be easily solved;
2) the traditional cleaning method is often contact cleaning, mechanical force is applied to the surface of a cleaned object, the surface of the object is damaged or a cleaning medium is attached to the surface of the cleaned object and cannot be removed, secondary pollution is generated, and the problems are solved by non-grinding and non-contact of laser cleaning;
3) the laser can be transmitted through the optical fiber and is matched with the robot hand and the robot, so that the remote operation is conveniently realized, the parts which are difficult to reach by the traditional method can be cleaned, and the safety of personnel can be ensured when the laser is used in some dangerous places;
4) the laser cleaning can remove various types of pollutants on the surfaces of various materials, and the cleanness which cannot be achieved by conventional cleaning is achieved. But also can selectively clean the pollutants on the surface of the material under the condition of not damaging the surface of the material;
5) the laser cleaning efficiency is high, and the time is saved;
6) although the laser cleaning system is high in one-time investment in the early stage, the cleaning system can be stably used for a long time, the operation cost is low, and automatic operation can be conveniently realized.
Drawings
FIG. 1 is a schematic view of an embodiment of the apparatus of the present invention in use;
FIG. 2 is a schematic flow chart of an embodiment of the method of the present invention.
Detailed Description
The technical scheme of the invention is further explained by combining the drawings and the embodiment.
Referring to fig. 1, the device for online removing scale on the inner wall of an oil pipe provided by the present invention includes a laser cleaning head located at one end (thickened end) of the oil pipe 100, and an adsorption recoverer 14 located at the other end (adsorption end) of the oil pipe 100.
The laser cleaning head comprises a translation table 1 located at the thickened end of the oil pipe 100, a rotating lens barrel 2 is installed on the translation table 1, a focusing mirror 3 and a laser reflecting mirror 4 are installed inside the rotating lens barrel 2, a laser light emitting point 5 is arranged on the front end portion of the rotating lens barrel 2, and a two-dimensional galvanometer system 6, a laser collimating mirror 7 and a laser 8 are sequentially installed on the rear end portion of the rotating lens barrel 2.
The translation stage 1 realizes the horizontal movement through the translation stage driver 9, thereby realizing the horizontal movement of the laser cleaning head.
The rotating lens barrel 2 is rotated by a speed regulating motor 10, the speed regulating motor 10 is driven by a motor speed regulating driver 11, so that the rotating lens barrel 2 rotates at a certain rotating speed (namely 50-600 RPM) to drive the cleaning working light spots to perform rotary scanning on the inner surface of the thickened end of the cleaned oil pipe 100.
The laser 8 is a pulse type fiber laser which is provided with a QBH joint 12.
The pulse type fiber laser generates high-power laser, the high-power laser is collimated into parallel laser beams through a laser collimating mirror 7, the parallel laser beams are spatially modulated by a two-dimensional vibrating mirror system 6, then are converged through a focusing mirror 3, are reflected by a laser reflecting mirror 4, and finally are focused by a laser light emitting point 5 to irradiate the inner surface of the thickened end of the cleaned oil pipe 100 to form a cleaning working light spot with the length of 0.6mm and the width of 0.6 mm.
The rotation cylinder 2 is rotated by a support bearing 13.
Referring to fig. 2, the present invention further provides an online removing method for iron scale on an inner wall of an oil pipe, including the following steps:
1) according to the actual situation of the production unit of the oil pipe transportation system, butting the laser cleaning head with the process structure and the electricity of the oil pipe transportation system;
2) according to the unit logistics signal and the laser cleaning head quitting completion signal (LCO), the thickened end of the oil pipe 100 to be cleaned is conveyed to a cleaning working position, and an oil pipe cleaning in-place Signal (SPI) is sent;
3) the laser cleaning head receives the SPI signal, starts the laser cleaning head to move horizontally and rotate to enter the interior of the oil pipe 100, and when a laser light emitting point 5 reaches a set cleaning position (which is preset according to the position of an end head of the oil pipe conveyed by an oil pipe conveying system and the installation position of the laser cleaning head), starts a laser 8 to output strong light and give a strong light warning signal (LPI), so that the inner wall of the oil pipe 100 is cleaned;
4) the adsorption recoverer 14 is placed at the adsorption end of the oil pipe 100, and the smoke, pollution, oxide dust and the like generated by the laser cleaning head in the cleaning process are adsorbed by adopting a powerful air suction working mode. The adsorption recoverer 14 receives the SPI signal, the adsorption end of the adsorption recoverer 14 is closely attached to the adsorption end of the cleaned oil pipe 100 in a sealing mode, and adsorption work is started;
5) after the laser cleaning head finishes cleaning the inner wall with the depth of 200mm, the laser 8 is turned off to output strong light, and the strong light warning signal (LPI) is removed, the oil pipe 100 is withdrawn, and a laser cleaning head withdrawal completion signal (LCO) is given;
6) the adsorption recoverer 14 receives the LCO signal, and withdraws the adsorption end of the adsorption recoverer 14 from the adsorption end of the cleaned oil pipe 100. The adsorption reclaimer 14 is provided with a reclaiming tank 15 for storing the cleaned oxide dust.
Examples
The conditions of the oil pipe to be cleaned are as follows:
1) thickness of iron scale: 0.1 mm-0.4 mm;
2) inner diameter of thickened end: phi is 61mm to 62mm, or phi is 75mm to 76 mm;
3) cleaning time of each end: less than or equal to 60 seconds;
4) cleaning end axial depth: more than or equal to 230 mm;
the rotary scanning laser cleaning head constructed by a pulse type fiber laser with the power of 500W and the pulse frequency of 50KHz is adopted to clean the iron scale on the inner wall of the thickened end of the oil pipe with the thickness of 200mm in 45 seconds.
The scanning residence time of the laser light emitting point 5 is properly adjusted, so that the cleaning work of the iron oxide scales on the surface of the inner wall of the oil pipe and the sporadic distribution graphite patches can be realized, and about 1 minute is required for completing the cleaning of the inner wall of one end head.
In conclusion, the thickening end (the inner diameter phi is 60 mm-80 mm) of the oil pipe is heated at 1100-1200 ℃, graphite is used for lubricating the inner wall of the steel pipe and a die, the thickening is subjected to heat treatment in a subsequent process, iron scales exist on the inner surface of the pipe end, residual graphite materials are also mixed, the iron scales with the residual graphite are difficult to scrape manually, and the problems of dust pollution and occupational health protection are caused. The invention solves two problems that the prior common laser cleaning equipment is not suitable for small-caliber steel pipes, the inner surface space is narrow, and graphite oxide scales are not easy to clean. The system design can meet the requirement of large-scale production on-line cleaning.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (7)
1. The utility model provides a device that is used for oil pipe inner wall iron scale to clear away on line which characterized in that: the device comprises a laser cleaning head positioned at one end of the oil pipe and an adsorption recoverer positioned at the other end of the oil pipe;
the laser cleaning head comprises a translation table positioned at one end of the oil pipe, a rotating lens barrel is arranged on the translation table, a focusing mirror and a laser reflecting mirror are arranged inside the rotating lens barrel, a laser light emitting point is arranged at the front end part of the rotating lens barrel, and a two-dimensional galvanometer system, a laser collimating mirror and a laser are sequentially arranged at the rear end part of the rotating lens barrel;
the translation stage realizes horizontal movement through a translation stage driver;
the rotating lens barrel rotates through a speed regulating motor, and the speed regulating motor is driven by a motor speed regulating driver.
2. The device for online removing the scale on the inner wall of the oil pipe as claimed in claim 1, wherein: the laser is a pulse type fiber laser which is provided with a QBH joint.
3. The device for online removing the scale on the inner wall of the oil pipe as claimed in claim 1, wherein: the rotating cylinder is rotated by a support bearing.
4. The device for online removing the scale on the inner wall of the oil pipe as claimed in claim 1, wherein: the adsorption recoverer is provided with a recovery box.
5. A method for online removing of oxide scales on the inner wall of an oil pipe is characterized by comprising the following steps:
1) butting the laser cleaning head in the device according to any one of claims 1 to 4 with a steel pipe production and transmission process structure and electrically;
2) conveying the thickened end of the steel pipe to be cleaned to a cleaning working position, and sending a steel pipe cleaning in-place signal;
3) the laser cleaning head receives the signal of the step 2), starts the laser cleaning head to move horizontally and rotate to enter the steel pipe, and reaches a set cleaning position to clean the inner wall of the steel pipe;
4) placing an adsorption recoverer in the device of any one of claims 1-4 at the other end of the steel pipe, wherein the adsorption recoverer receives the signal of the step 2), starts the adsorption recoverer, and adsorbs the smoke, pollution and dust generated by the laser cleaning head in the cleaning process;
5) after cleaning is finished, the laser cleaning head withdraws from the steel pipe and sends a withdrawal completion signal;
6) and the adsorption recoverer receives the signal of the step 5) and retreats from the other end of the steel pipe.
6. The method for online removing the scale on the inner wall of the oil pipe as claimed in claim 5, wherein the method comprises the following steps: the pipe diameter of the steel pipe is between 60mm phi and 80mm phi.
7. The method for online removing the scale on the inner wall of the oil pipe as claimed in claim 5, wherein the method comprises the following steps: the moving distance of the laser cleaning head in the steel pipe is 200 mm-230 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010472724.1A CN113731955A (en) | 2020-05-29 | 2020-05-29 | Device and method for online removal of oxide scales on inner wall of oil pipe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010472724.1A CN113731955A (en) | 2020-05-29 | 2020-05-29 | Device and method for online removal of oxide scales on inner wall of oil pipe |
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| CN113731955A true CN113731955A (en) | 2021-12-03 |
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| CN202010472724.1A Pending CN113731955A (en) | 2020-05-29 | 2020-05-29 | Device and method for online removal of oxide scales on inner wall of oil pipe |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114850138A (en) * | 2022-04-24 | 2022-08-05 | 中国科学院重庆绿色智能技术研究院 | Laser cleaning device and method for inner wall of solid rocket engine shell |
| CN117066699A (en) * | 2023-08-31 | 2023-11-17 | 上海建冶科技股份有限公司 | Laser rust removing equipment for steel member |
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Application publication date: 20211203 |