CN114273189B - Construction method for internal anticorrosion spraying of large-diameter water delivery steel pipe - Google Patents
Construction method for internal anticorrosion spraying of large-diameter water delivery steel pipe Download PDFInfo
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- CN114273189B CN114273189B CN202111491640.3A CN202111491640A CN114273189B CN 114273189 B CN114273189 B CN 114273189B CN 202111491640 A CN202111491640 A CN 202111491640A CN 114273189 B CN114273189 B CN 114273189B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention relates to the technical field of steel pipe internal corrosion prevention construction, in particular to a construction method for internal corrosion prevention spraying of a large-diameter water delivery steel pipe, which comprises the following steps: step one, construction preparation; step two, cleaning; thirdly, derusting for the first time; step four, secondary derusting; step five, manufacturing mortar; and sixthly, carrying out guniting construction. According to the construction process, the cement mortar can be coated on the inner wall of the large-diameter water delivery steel pipe to form the mortar layer for corrosion prevention, and compared with the protection by using corrosion-resistant paint, corrosion-resistant asphalt and the like, the damage to underground water, soil around the pipe, organisms and the like is avoided.
Description
Technical Field
The invention relates to the technical field of steel pipe internal corrosion prevention construction, in particular to a construction method for internal corrosion prevention spraying of a large-diameter water delivery steel pipe.
Background
If the steel pipe is not immediately subjected to anticorrosive treatment after production, the steel pipe can be corroded slowly, and for the water supply steel pipe, the inner wall of the steel pipe is unprotected, so that the inner wall of the steel pipe can be corroded, peeled and fallen after long-term use, and the service life of a pipeline and the water quality of water supply are influenced. Especially, the large-caliber long-distance water delivery steel pipe has longer service life, corrosion is not easy to be noticed, the workload of maintenance and reconstruction is large, and the cost is high, so the water delivery steel pipe needs to be subjected to anticorrosion treatment.
The corrosion prevention in the steel pipe refers to performing corrosion prevention treatment on the inner wall of the steel pipe, cement mortar, chemical coating and the like are generally used for protection in the prior art, and the damage to the pipe wall caused by fluid substances conveyed in the pipe is mainly prevented, however, in the prior art, the internal corrosion prevention of the large-diameter steel pipe is not performed by a better construction process.
Disclosure of Invention
Aiming at certain defect or defects in the prior art, the invention provides an internal corrosion-resistant spraying construction method for a large-diameter water delivery steel pipe.
In order to solve the above technical problems, the present invention is solved by the following technical solutions.
An anti-corrosion spraying construction method in a large-diameter water delivery steel pipe comprises the following steps:
step one, construction preparation
The method is used for preparing equipment and materials required by anticorrosive spraying construction in the large-diameter water delivery steel pipe;
step two, cleaning
The cleaning device is used for cleaning sundries on the inner wall of the large-diameter water delivery steel pipe;
step three, once rust removal
The rust removal device is used for carrying out primary rust removal on the inner wall of the large-diameter water delivery steel pipe in the second step;
step four, secondary rust removal
The rust removal device is used for carrying out secondary rust removal on the inner wall of the large-diameter water delivery steel pipe in the third step;
step five, mortar preparation
The method is used for manufacturing cement mortar for corrosion prevention of the inner wall of the large-diameter water delivery steel pipe;
sixthly, guniting construction
And D, spraying the cement mortar prepared in the step five onto the inner wall of the large-diameter water delivery steel pipe through a spraying construction device.
The construction process can coat the cement mortar on the inner wall of the large-diameter water delivery steel pipe to form a mortar layer for corrosion prevention, and compared with the protection by using anticorrosive paint, anticorrosive asphalt and the like, the damage to underground water, soil around the pipe, organisms and the like is avoided.
Preferably, the sixth step specifically comprises the following steps:
s1, conveying the cement mortar manufactured in the fifth step into a spraying construction device through a battery car;
s2, the spraying construction device is located in the large-diameter water delivery steel pipe to move, and secondary rust removal and spraying operation is carried out;
and S3, curing the cement mortar layer sprayed on the inner wall of the steel pipe in the step S2.
Through the steps of the invention, the spraying conveying device is preferably used for spraying cement mortar on the inner wall of the steel pipe to form a cement mortar anticorrosive layer, and the inner wall of the steel pipe is preferably subjected to corrosion prevention.
Preferably, in the third step, a water sand-blasting machine is adopted to remove rust on the inner wall of the large-diameter water delivery steel pipe for the first time, and preferably, the inner wall of the long-distance steel pipe is removed.
Preferably, the spraying construction device comprises a vehicle body, wherein a spraying machine body is arranged on the vehicle body, and a spraying assembly for carrying out rust removal spraying on the inner wall of the steel pipe is arranged on the spraying machine body; the spraying assembly comprises a spraying pipe with one end rotatably connected to the sprayer body, and a nozzle communicated with the inside of the spraying pipe is uniformly distributed on the outer side face of the other end of the spraying pipe along the circumferential direction of the spraying pipe.
Through the structure of the invention, the vehicle body moves in the steel pipe, so that the spraying machine body on the vehicle body can convey cement mortar into the spraying pipe and spray the cement mortar to the inner wall of the steel pipe through the nozzle, and the inner wall of the steel pipe is better prevented from corrosion.
Preferably, the vehicle body is provided with a mounting bottom plate, and the spraying pipe is mounted on the mounting bottom plate through a bearing mounting seat; a key groove is formed in the outer side wall of one end of the spraying pipe along the length direction of the spraying pipe, a first gear is arranged on the spraying pipe, and a key matched with the key groove is arranged on the first gear; the spraying machine body is provided with a fixing plate, the fixing plate is provided with a motor, and an output shaft of the motor is provided with a second gear matched with the first gear.
Rotation of the spray tube is preferably achieved by the construction of the invention.
Preferably, the motor is provided with a dust cover sleeved outside the first gear and the second gear, and the motor, the first gear and the second gear are preferably protected.
Preferably, the other end of the spraying pipe is arranged in the middle of the spraying pipe, an installation rod is arranged along the axial direction of the spraying pipe, a long strip-shaped installation plate is arranged on the installation rod, movable moving plates are symmetrically arranged on the installation plate, and grinding wheels used for removing rust on the inner wall of the steel pipe are arranged at the end parts of the moving plates.
Through the structure of the invention, the spray pipe can rotate to drive the mounting plate on the mounting rod to rotate, so as to drive the grinding wheel on the spray pipe to grind and remove rust on the inner wall of the steel pipe.
Preferably, the movable plate is symmetrically provided with a plurality of mounting holes along the length direction, the mounting plate is provided with fixing holes corresponding to the mounting holes, and the movable plate passes through the corresponding mounting holes and the corresponding fixing holes through bolts and is mounted on the mounting plate.
Through the structure of the invention, the movable plate is preferably convenient to disassemble and assemble on the mounting plate, the grinding wheel arranged on the movable plate is convenient to attach to the inner wall of the steel pipe, and the steel pipe is convenient to polish and derust.
Preferably, baffles are arranged at the other end of the spray pipe and are positioned at two sides of the nozzle, and a partition plate for separating the nozzles is arranged between the baffles, so that the nozzles are preferably protected.
Drawings
FIG. 1 is a schematic flow chart of an anticorrosive spraying construction method in a large-diameter water pipe in example 1;
FIG. 2 is a schematic view of a spray coating construction device in embodiment 2;
FIG. 3 is a schematic view of a spray coating construction device in embodiment 2;
FIG. 4 is an enlarged view of portion A of FIG. 3;
FIG. 5 is a schematic view of a spray pipe in example 2;
fig. 6 is a schematic view showing the connection of the mounting plate and the moving plate in embodiment 1.
Detailed Description
For a further understanding of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings and examples. It is to be understood that the examples are illustrative of the invention and not limiting.
Example 1
As shown in fig. 1, the embodiment provides an internal corrosion-resistant spraying construction method for a large-diameter water-conveying steel pipe, which comprises the following steps:
step one, construction preparation
The method is used for preparing equipment, materials and the like required by anticorrosion construction in the large-diameter water delivery steel pipe, such as cement, yellow sand, a battery car and the like for construction;
step two, cleaning
The cleaning device is used for cleaning sundries on the inner wall of the large-diameter water delivery steel pipe and cleaning various construction wastes such as welding rods, soil, battens and the like so as to ensure that a cement mortar layer can be well adhered to the pipe wall;
step three, once rust removal
The rust removal device is used for carrying out primary rust removal on the inner wall of the large-diameter water delivery steel pipe in the step two;
step four, secondary rust removal
The rust removal device is used for carrying out secondary rust removal on the inner wall of the large-diameter water delivery steel pipe in the third step;
step five, mortar preparation
The method is used for manufacturing cement mortar for corrosion prevention of the inner wall of the large-diameter water delivery steel pipe;
sixthly, guniting construction
And D, spraying the cement mortar prepared in the step five onto the inner wall of the large-diameter water delivery steel pipe through a spraying construction device.
The construction process in this embodiment can form the mortar layer with cement mortar coating on major diameter water delivery steel pipe inner wall and carry out anticorrosive, compares in using anticorrosive paint, anticorrosive pitch etc. to protect, has avoided causing the infringement to groundwater, pipe week soil, biology etc. simultaneously, cement mortar and steel pipe inner wall cohesive force are bigger, makes cement mortar and steel pipe inner wall in close connection with, is difficult for peeling off to make major diameter water delivery steel pipe inner wall obtain the anticorrosive of preferred.
In this embodiment, the sixth step specifically includes the following steps:
s1, conveying the cement mortar manufactured in the step V to a spraying construction device in a large-diameter water conveying steel pipe through a storage battery car, and conveying the cement mortar to the spraying construction device through a conveying belt;
s2, moving the spraying construction device in the large-diameter water delivery steel pipe, and carrying out secondary derusting and spraying operation;
and S3, curing the cement mortar layer sprayed on the inner wall of the steel pipe in the step S2.
Through the steps in this embodiment, make spraying conveyor spray cement mortar to form cement mortar anticorrosive coating on the steel pipe inner wall better, realize anticorrosive steel pipe inner wall better.
In this embodiment, spraying construction equipment sprays two-layer cement mortar to steel pipe inner wall, and wherein, first layer cement mortar spraying 10mm carries out manual press polish, waits that cement mortar solidifies 24 hours, sprays second layer cement mortar 10mm, then carries out manual receipts light, trowels, makes cement mortar layer surface smooth, nos trace.
In this embodiment, through the maintenance of watering to the cement mortar layer after solidifying, shelter from the steel pipe both ends after accomplishing the spraying, avoid sunshine to penetrate directly and the sand blown by the wind gets into to prevent that the crack appears too fast in the water loss of cement mortar layer.
In the embodiment, in the third step, the inner wall of the large-diameter conveying steel pipe is subjected to primary rust removal by using the water sand-blasting machine, and the disadvantages that other rust removal cannot be performed, such as poor ventilation condition in the pipeline, long pipeline interval and the like, are avoided because the water sand-blasting machine adopts clean water for high-pressure rust removal. After the first rust removal, attachments such as oxide skin, floating rust, soil, grease, welding slag, dirt and sundries on the inner wall of the pipeline are cleaned by a high-pressure water gun cleaning machine, and then garbage and accumulated water are cleaned.
Example 2
The present embodiment provides a spray painting construction apparatus for carrying out the secondary rust removal and spray painting operation in embodiment 1.
As shown in fig. 2 to 3, the painting construction device includes a vehicle body 100, a painting machine body 110 is provided on the vehicle body 100, and a painting assembly 120 for removing rust and painting on the inner wall of the steel pipe is provided on the painting machine body 110; the spray assembly 120 includes a spray tube 310 with one end rotatably connected to the sprayer body 110, and nozzles 311 are uniformly arranged at the other end of the spray tube 310 and on the outer side surface along the circumference thereof and communicated with the interior of the spray tube 310.
In this embodiment, the car body 100 is a movable trolley in the prior art, the sprayer body 110 is a sprayer in the prior art, and can be used for compressing and conveying cement mortar to an output end, and the sprayer body 110 in this embodiment is mounted on the car body 100 and moves along with the car body 100 in a large-diameter water conveying steel pipe; in the construction process, the battery car conveys the mixed cement mortar to a spraying construction device in the steel pipe and then conveys the cement mortar to a hopper of the sprayer body 110 by a conveying belt;
in this embodiment, the spraying pipe 310 is rotatably connected to the output end of the sprayer body 110, so that the sprayer body 110 can compress and convey cement mortar into the spraying pipe 310, and the cement mortar is sprayed out through the nozzle 311 to be coated on the inner wall of the steel pipe, and the spraying pipe 310 can rotate to drive the nozzle 311 to rotate, so that the cement mortar can be rotatably coated on the inner wall of the steel pipe; in this embodiment, the spray pipe 310 installed on the sprayer body 110 is located on the axis of the steel pipe so that the nozzle 311 uniformly sprays cement mortar on the inner wall of the steel pipe.
Referring to fig. 4 to 5, in the present embodiment, the vehicle body 100 is provided with a mounting base plate 320, and the spray pipe 310 is mounted on the mounting base plate 320 through a bearing mounting seat 321; it is preferred that the spray tube 310 be pivotally mounted to the mounting plate 320 to facilitate pivotal connection to the applicator body 110.
In this embodiment, a key slot 411 is formed on the outer side wall of one end of the spray pipe 310 along the length direction thereof, the spray pipe 310 is provided with a first gear 312, and the first gear 312 is provided with a key matched with the key slot 411; the sprayer body 110 is provided with a fixing plate 330, the fixing plate 330 is provided with a motor 331, and an output shaft of the motor 331 is provided with a second gear 332 matched with the first gear 312.
With the configuration in this embodiment, the first gear 312 is disposed on the spraying pipe 310 through the key and the key slot 411, which is disposed through the fixing plate 330, the motor 331 and the second gear 332, so that the motor 331 drives the second gear 332 to rotate and drive the first gear 312 to rotate, thereby realizing the rotation of the spraying pipe 310.
In this embodiment, a dust cover 121 is disposed on the motor 331 and covers the first gear 312 and the second gear 332, so as to preferably protect the motor 331, the first gear 312 and the second gear 332.
In this embodiment, the other end of the spray pipe 310 is provided with baffle plates 421 located at both sides of the nozzle 311, and a partition plate 422 for partitioning the nozzle 311 from each other is provided between the baffle plates 421.
By the configuration in the embodiment, the baffle 421 and the partition 422 form a protection cavity, so that the nozzle 311 is located in the protection cavity and is better protected.
Referring to fig. 6, in the present embodiment, a mounting rod 412 is disposed at the other end and the middle of the spray tube 310 along the axial direction thereof, a strip-shaped mounting plate 510 is disposed on the mounting rod 412, a movable plate 520 is symmetrically disposed on the mounting plate 510, and a grinding wheel 530 for removing rust on the inner wall of the steel tube is mounted at the end of the movable plate 520.
Through the arrangement of the moving plate 520 and the mounting plate 510 in the embodiment, the grinding wheel 530 mounted at the end of the moving plate 520 can be attached to the inner side wall of the steel pipe; the texture of the grinding wheel 530 is soft, so that the spraying pipe 310 can rotate to drive the mounting rod 412 to rotate, the mounting plate 510 is driven to rotate to enable the grinding wheel 530 to polish and derust the inner side wall of the steel pipe, the spraying component 120 can synchronously derust and spray the inner side wall of the steel pipe in the moving process of the vehicle body 100, and the side wall of the steel pipe after derusting is prevented from being oxidized again.
In this embodiment, the moving plate 520 is symmetrically provided with a plurality of mounting holes 521 along the length direction thereof, the mounting plate 520 is provided with fixing holes corresponding to the mounting holes 521, and the moving plate 520 is mounted on the mounting plate 510 by passing bolts through the corresponding mounting holes 521 and fixing holes.
With the configuration of the present embodiment, the movable mounting of the movable plate 520 on the mounting plate 510 is preferably achieved, and the grinding wheel 530 on the movable plate 520 is preferably allowed to adhere to the inner wall of the steel pipe.
In summary, the above-mentioned embodiments are only preferred embodiments of the present invention, and all equivalent changes and modifications made in the claims of the present invention should be covered by the claims of the present invention.
Claims (4)
1. An anticorrosion spraying construction method in a large-diameter water delivery steel pipe comprises the following steps:
step one, construction preparation
The method is used for preparing equipment and materials required by the anticorrosion spraying construction in the large-diameter water delivery steel pipe;
step two, cleaning
The cleaning device is used for cleaning sundries on the inner wall of the large-diameter water delivery steel pipe;
step three, once rust removal
The rust removal device is used for carrying out primary rust removal on the inner wall of the large-diameter water delivery steel pipe in the step two;
step four, secondary rust removal
The rust removal device is used for carrying out secondary rust removal on the inner wall of the large-diameter water delivery steel pipe in the third step;
step five, mortar preparation
The method is used for manufacturing cement mortar for corrosion prevention of the inner wall of the large-diameter water delivery steel pipe;
sixthly, guniting construction
Spraying the cement mortar prepared in the fifth step onto the inner wall of the large-diameter water delivery steel pipe through a spraying construction device, and specifically comprising the following steps:
s1, conveying the cement mortar manufactured in the fifth step into a spraying construction device through a battery car;
s2, the spraying construction device is located in the large-diameter water delivery steel pipe to move, and secondary rust removal and spraying operation is carried out;
s3, curing the cement mortar layer sprayed on the inner wall of the steel pipe in the step S2;
the spraying construction device comprises a vehicle body, wherein a sprayer body (110) is arranged on the vehicle body (100), and a spraying assembly (120) for carrying out rust removal spraying on the inner wall of the steel pipe is arranged on the sprayer body (110); the spraying component (120) comprises a spraying pipe (310) with one end rotatably connected to the sprayer body (110), and nozzles (311) communicated with the spraying pipe (310) are uniformly distributed at the other end of the spraying pipe (310) and positioned on the outer side surface along the circumferential direction of the spraying pipe;
the vehicle body (100) is provided with a mounting bottom plate (320), and the spraying pipe (310) is mounted on the mounting bottom plate (320) through a bearing mounting seat (321); a key slot (411) is formed in the outer side wall of one end of the spraying pipe (310) along the length direction of the spraying pipe, a first gear (312) is arranged on the spraying pipe (310), and a key matched with the key slot (411) is arranged on the first gear (312); a fixing plate (330) is arranged on the sprayer body (110), a motor (331) is arranged on the fixing plate (330), and a second gear (332) matched with the first gear (312) is arranged on an output shaft of the motor (331);
an installation rod (412) is arranged at the other end part and the middle part of the spraying pipe (310) along the axial direction of the spraying pipe, a strip-shaped installation plate (510) is arranged on the installation rod (412), movable moving plates (520) are symmetrically arranged on the installation plate (510), and grinding wheels (530) used for removing rust on the inner wall of the steel pipe are arranged at the end parts of the moving plates (520); a plurality of mounting holes (521) are symmetrically formed in the moving plate (520) along the length direction of the moving plate, fixing holes are formed in the mounting plate (510) corresponding to the mounting holes (521), and the moving plate (520) penetrates through the corresponding mounting holes (521) and the fixing holes through bolts and is mounted on the mounting plate (510).
2. The construction method for the anticorrosion spraying in the large-diameter water conveying steel pipe as claimed in claim 1, which is characterized in that: and in the third step, a water sand sprayer is adopted to remove rust on the inner wall of the large-diameter water delivery steel pipe for the first time.
3. The construction method for the anticorrosion spraying in the large-diameter water conveying steel pipe as claimed in claim 1, which is characterized in that: a dust cover (121) sleeved outside the first gear (312) and the second gear (332) is arranged at the position of the motor (331).
4. The construction method for the internal anticorrosion spraying of the large-diameter water delivery steel pipe according to claim 1, is characterized in that: the other end of the spraying pipe (310) is provided with baffle plates (421) positioned at two sides of the nozzle (311), and a partition plate (422) used for separating the nozzle (311) is arranged between the baffle plates (421).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111491640.3A CN114273189B (en) | 2021-12-08 | 2021-12-08 | Construction method for internal anticorrosion spraying of large-diameter water delivery steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111491640.3A CN114273189B (en) | 2021-12-08 | 2021-12-08 | Construction method for internal anticorrosion spraying of large-diameter water delivery steel pipe |
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| Publication Number | Publication Date |
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| CN114273189A CN114273189A (en) | 2022-04-05 |
| CN114273189B true CN114273189B (en) | 2023-04-07 |
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| CN112170071A (en) * | 2020-09-29 | 2021-01-05 | 福州市长乐区艾德利电子科技有限公司 | Automatic rust cleaning of building steel pipe inner wall and device that sprays paint |
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