A kind of painting equipment for anti-corrosion of marine engineering pipeline

Abstract

The present invention relates to the technical field of anti-corrosion pipeline production, and in particular to a paint spraying device for anti-corrosion of marine engineering pipelines, including a first bracket, a second bracket and a pipeline, and also including: a working tank; a circulating supply mechanism, the circulating supply mechanism is arranged on one side of a workbench; a driving motor, the output end of the driving motor is keyed to a driving shaft, and a section of the driving shaft located inside the working tank is provided with a high-temperature resistant rubber rod on an outer fixed sleeve; a mounting frame, the mounting frame is fixedly connected to the top of the first bracket and the second bracket, and a sandblasting part and a paint spraying part are respectively installed on the mounting frame. In the present application, two protective layers of the pipeline are formed by hot-dip galvanizing and anti-corrosion coating, respectively, providing a double physical isolation layer, and the double protective layer can more effectively prevent the corrosion of corrosive media such as seawater and oxygen to the pipeline metal, and at the same time, the setting of the wavy reinforcement coating can effectively protect the welding part of the pipeline.

Description

Technical Field

[0001] The invention relates to the technical field of anti-corrosion pipeline production, and in particular to a paint spraying device for anti-corrosion of marine engineering pipelines. Background Art

[0002] A pipeline is a device connected by pipes, pipe connectors and valves for transporting gas, liquid or fluid with solid particles. Due to its unique characteristics, pipelines are widely used in water supply, drainage, heating, gas supply, long-distance transportation of oil and natural gas, agricultural irrigation and water conservancy projects. In order to extend the service life of the pipeline, it is often necessary to use a paint spraying device to spray the surface of the pipeline for anti-corrosion treatment.

[0003] However, since the use scenario of marine engineering pipelines is on the seabed, the requirements for corrosion protection are higher than those in general use scenarios, and the welding parts of the pipelines are more susceptible to corrosion. Therefore, certain designs are required when painting to enhance the corrosion protection effect of the welding parts.

[0004] For example, the patent application document with Chinese patent publication number CN115090475A discloses a rotary anti-corrosion coating device for marine engineering pipelines. Although the device can spray anti-corrosion coating on the surface of steel pipes, since the device can only form an anti-corrosion layer (protective layer) on the surface of the pipeline, the anti-corrosion layer is very easy to be damaged during the use of the pipeline, thereby causing the pipeline itself to be corroded. At the same time, the device is also difficult to effectively protect the welding parts of the pipeline to extend the service life of the anti-corrosion layer. Summary of the invention

[0005] The purpose of the present invention is to solve the above-mentioned shortcomings existing in the prior art and to propose a paint spraying device for anti-corrosion of marine engineering pipelines.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A paint spraying device for anticorrosion of marine engineering pipelines, comprising a first bracket, a second bracket and a pipeline, wherein a workbench is arranged between the first bracket and the second bracket, and further comprising:

[0008] A working trough, the working trough is arranged inside the upper part of the workbench, and a material discharge trough is arranged at the middle position of the bottom wall of the working trough;

[0009] A circulating supply mechanism, which is arranged on one side of the workbench and is used to input and output hot-dip galvanized materials into and out of the working tank;

[0010] A driving motor, wherein two groups of driving motors are arranged in parallel, and both groups of driving motors are fixedly mounted on the first bracket, and the output end of the driving motor is key-connected with a driving shaft, and the end of the driving shaft away from the driving motor rotates through the side wall of one end of the workbench and is rotatably connected to the inner wall of the other end of the workbench, and a section of the driving shaft located inside the working groove is provided with a high-temperature resistant rubber rod on the outer fixed sleeve, and the pipeline is placed on the upper surface of the two high-temperature resistant rubber rods;

[0011] The mounting frame is fixedly connected to the top ends of the first bracket and the second bracket, and a sandblasting part and a painting part are respectively installed on the mounting frame.

[0012] Preferably, a plurality of support columns are fixedly connected to the lower end surface of the workbench, and the plurality of support columns are used to support the workbench.

[0013] Preferably, the circulation supply mechanism includes a liquid storage tank, in which molten zinc water with a temperature of 450°C is stored, and the output end of the liquid storage tank is fixedly connected to a liquid inlet pipe, and the end of the liquid inlet pipe away from the liquid storage tank is fixedly connected to the inside of the working tank, and a return liquid pipe is fixedly connected between the input end of the liquid storage tank and the discharge trough.

[0014] Preferably, a welding point is provided at the middle position of the pipeline, and a wavy reinforcement coating is evenly sprayed on the surface of the welding point.

[0015] Preferably, slide grooves are provided on both sides of the mounting frame, the sandblasting part comprises a second slider slidably connected to the inside of the slide groove, a sandblasting gun is fixedly mounted on the lower end of the second slider, and the input end of the sandblasting gun is connected to an external sand supply device.

[0016] Preferably, the paint spraying part comprises a first sliding block slidably connected to the inside of the slide groove, a paint spraying gun is fixedly mounted on the lower end of the first sliding block, and an input end of the paint spraying gun is connected to an external paint supply device.

[0017] Preferably, an adjustable baffle for controlling the paint flow is installed at the output end of the paint spray gun.

[0018] Preferably, a screw lift is fixedly mounted on the second bracket, a screw is provided at the output end of the screw lift, the end of the screw close to the workbench rotates through the side wall of the workbench and then extends into the working groove, and a paint spray head is fixed at the end of the screw located inside the working groove.

[0019] Preferably, the rotation directions of the two drive motors are exactly the same.

[0020] Preferably, inclined surfaces are symmetrically arranged on both sides of the lower interior of the working tank to facilitate the concentration of hot-dip galvanized materials.

[0021] Compared with the prior art, the advantages of the present invention are:

[0022] 1. In the present application, by setting up a circulating supply mechanism, the molten zinc water with a storage temperature of about 450°C in the liquid storage tank can be transported to the working tank through the liquid inlet pipe, so that the inner and outer walls of the pipeline can be galvanized, and after the processing is completed, the excess molten zinc water can flow back to the liquid storage tank through the return pipe, so that the molten zinc water can be recycled.

[0023] 2. In the present application, two high-temperature resistant rubber rods with the same rotation direction are arranged. When the two high-temperature resistant rubber rods rotate, the pipe can be driven to rotate, so that the inner and outer surfaces of the pipe are hot-dip galvanized, so that the entire pipe inside and outside is covered with molten zinc water without dead corners and protected.

[0024] 3. In the present application, the sandblasting unit is set up to remove dirt on the surface of the zinc layer and smooth out the uneven surface. The surface temperature of the pipe is increased during hot-dip galvanizing, which can soften the dirt and make it easier to be removed by sandblasting. The surface of the zinc layer has a certain degree of roughness, which can enhance the adhesion between the anti-corrosion coating and the surface of the zinc layer and improve the anti-corrosion effect when spraying the anti-corrosion coating later.

[0025] 4. In this application, by setting up the spray paint unit, a layer of primer can be sprayed on the surface of the pipeline first, and a more uniform and firm anti-corrosion coating can be formed under the cooperation of the residual temperature of the pipeline surface and the tiny depressions formed on the pipeline surface during the sandblasting process. At the same time, the drying speed of the coating will also be accelerated, which is conducive to improving the quality and durability of the coating. In addition, a wavy reinforcement coating can be applied to the welding part of the pipeline. On the one hand, spraying an extra layer of paint can strengthen the protection of the welding part, and on the other hand, it can reduce the impact of seawater flow on the anti-corrosion layer, thereby extending the service life of the anti-corrosion layer.

[0026] In summary, in the present application, through the setting of the above-mentioned structure, hot-dip galvanizing treatment and anti-corrosion coating respectively form two protective layers for the pipeline, providing a double physical isolation layer. The double protective layer can more effectively prevent corrosive media such as seawater and oxygen from corroding the pipeline metal. At the same time, the setting of the wavy reinforcement coating can effectively protect the welding points of the pipeline and extend the service life of the anti-corrosion layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall axial structure of a paint spraying device for anti-corrosion of marine engineering pipelines proposed by the present invention.

[0028] Figure 2 This is a schematic diagram of the overall top view structure of a paint spraying device for anti-corrosion of marine engineering pipelines proposed by the present invention.

[0029] Figure 3 This is a schematic diagram of the structure of a liquid storage tank and a liquid inlet pipe of a paint spraying device for anti-corrosion of marine engineering pipelines proposed by the present invention.

[0030] Figure 4 This is a schematic diagram of the structure of a driving motor and a driving shaft of a paint spraying device for anti-corrosion of marine engineering pipelines proposed by the present invention.

[0031] Figure 5 This is a schematic diagram of the structure of pipelines and welding points of a paint spraying device for anti-corrosion of marine engineering pipelines proposed by the present invention.

[0032] Figure 6 This is a schematic diagram of a screw lifter and screw structure of a paint spraying device for anti-corrosion of marine engineering pipelines proposed by the present invention.

[0033] Figure 7 This is a schematic diagram of the paint spray gun and adjustable baffle structure of a paint spraying device for anti-corrosion of marine engineering pipelines proposed by the present invention.

[0034] Figure 8 This is a schematic structural diagram of a second sliding block and a sandblasting gun of a paint spraying device for anti-corrosion of marine engineering pipelines proposed by the present invention.

[0035] In the figure: 1 first bracket, 2 second bracket, 3 mounting frame, 4 slide, 5 workbench, 6 support column, 7 inclined surface, 8 unloading chute, 9 driving motor, 10 driving shaft, 11 high temperature resistant rubber rod, 12 pipeline, 13 welding point, 14 wavy reinforcement coating, 15 liquid storage tank, 16 liquid inlet pipe, 17 liquid return pipe, 18 screw lift, 19 screw, 20 paint spray head, 21 first slider, 22 paint spray gun, 23 adjustable baffle, 24 second slider, 25 sandblasting gun. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0037] Reference Figures 1 to 5A paint spraying device for anti-corrosion of marine engineering pipelines comprises a first bracket 1 and a second bracket 2, a workbench 5 is arranged between the first bracket 1 and the second bracket 2, a plurality of support columns 6 are welded and fixed to the lower end surface of the workbench 5, and a plurality of support columns 6 can support the workbench 5 to a certain extent, a working groove is provided inside the upper part of the workbench 5, inclined surfaces 7 are symmetrically provided on both sides of the lower part of the working groove, and a material discharge groove 8 is provided at the middle position of the bottom wall of the working groove, a liquid storage tank 15 is provided on one side of the workbench 5, and a liquid inlet pipe 16 is fixedly connected to the output end of the liquid storage tank 15, and an end of the liquid inlet pipe 16 away from the liquid storage tank 15 is fixedly connected to the inside of the working groove, and the input end of the liquid storage tank 15 and the material discharge groove 8 are fixedly connected through a liquid return pipe 17. The liquid storage tank 15 stores molten zinc water at a temperature of about 450°C. The molten zinc water can be transported to the working tank through the liquid inlet pipe 16, and after the processing is completed, the excess molten zinc water can flow back to the liquid storage tank 15 through the return pipe 17, thereby realizing the recycling of the molten zinc water.

[0038] Two sets of parallel drive motors 9 are fixedly installed on the first bracket 1 by bolts. The output end of the drive motor 9 is keyed to a drive shaft 10. The end of the drive shaft 10 away from the drive motor 9 rotates through the side wall of one end of the workbench 5 and is rotatably connected to the inner wall of the other end of the workbench 5. A section of the drive shaft 10 located inside the working groove is fixedly sleeved with a high-temperature resistant rubber rod 11. The high-temperature resistant rubber rod 11 is an asbestos rubber rod, which can withstand a high temperature of 800°C and the rubber will not be hot-dip galvanized. The two drive motors 9 rotate in the same direction. A pipe 12 is placed above the two high-temperature resistant rubber rods 11. Under the action of the two high-temperature resistant rubber rods 11, the pipe 12 can rotate at a uniform speed along a fixed direction, so that the surface of the pipe 12 can be uniformly and fully galvanized. A welding point 13 is provided at the middle position of the pipe 12, and the surface of the welding point 13 is uniformly sprayed with a wavy reinforcement coating 14 (the wavy reinforcement coating 14 is sprayed last).

[0039] Reference Figure 1 and Figure 6 A screw lift 18 is fixedly installed on the second bracket 2 by bolts, and a screw 19 is arranged at the output end of the screw lift 18. The end of the screw 19 close to the workbench 5 extends into the working groove after rotating through the side wall of the workbench 5, and a paint spraying head 20 is fixed at the end of the screw 19 located inside the working groove. When the screw lift 18 is running, the screw 19 can rotate and move to the right, and the paint spraying head 20 will also rotate and move at a uniform speed with the screw 19, and evenly apply a layer of paint to the inside of the pipe 12. Applying anti-corrosion paint can protect the internal structure of the pipe 12.

[0040] Reference Figure 1 as well as Figures 7 and 8The tops of the first bracket 1 and the second bracket 2 are welded and fixed with a mounting frame 3. Slide grooves 4 are provided on both sides of the mounting frame 3. The first slider 21 and the second slider 24 are slidably connected inside the slide grooves 4. A paint spray gun 22 is fixedly installed at the lower end of the first slider 21. The input end of the paint spray gun 22 is connected to an external paint supply device. An adjustable baffle 23 is installed at the output end of the paint spray gun 22. The flow rate of the output end of the paint spray gun 22 can be adjusted by the adjustable baffle 23. A sandblasting gun 25 is fixedly installed at the lower end of the second slider 24. The input end of the sandblasting gun 25 is connected to an external sand supply device.

[0041] The galvanized pipe 12 surface can be sandblasted by the sandblasting gun 25. On the one hand, the dirt on the zinc layer surface can be removed by sandblasting. On the other hand, the zinc layer surface can have a certain degree of roughness. When the anti-corrosion coating is sprayed later, the adhesion between the anti-corrosion coating and the zinc layer surface can be enhanced, thereby improving the anti-corrosion effect. After the sandblasting is completed, the anti-corrosion coating can be evenly sprayed onto the surface of the pipe 12 by the paint spraying gun 22, thereby improving the anti-corrosion ability of the pipe 12.

[0042] A sealing door is rotatably mounted on the front side of the workbench 5 , and the pipe 12 can be taken out by opening the sealing door after the pipe 12 is processed.

[0043] The specific working principle of the present invention is as follows: Since the pipeline 12 is used on the seabed, the anti-corrosion requirements are higher than those in general use scenarios, and the welding parts of the pipeline 12 are more susceptible to corrosion, so certain designs are required during painting to enhance the anti-corrosion effect of the welding parts.

[0044] Put the pipe 12 between the two high temperature resistant rubber rods 11 in the workbench 5, open the valve of the liquid inlet pipe 16, inject the molten zinc water heated to about 450°C in the liquid storage tank 15 into the workbench 5, immerse the lower half of the pipe 12, start the drive motor 9, and use the drive shaft 10 to drive the high temperature resistant rubber rod 11 to rotate. Here, the two high temperature resistant rubber rods 11 rotate in the same direction, which can drive the pipe 12 to rotate, so that the inner and outer surfaces of the pipe 12 are hot-dip galvanized, so that the entire pipe 12 is covered with molten zinc water without dead corners inside and outside and is protected.

[0045] After the hot-dip galvanizing of the pipe 12 is completed, the valve of the discharge chute 8 is opened, and with the assistance of the inclined surface 7 at the bottom of the workbench 5, the unused molten zinc water is returned to the liquid storage tank 15 through the return pipe 17 to prepare for the next use.

[0046] After waiting for the surface of the pipe 12 to cool down slightly for a while, start the sandblasting gun 25 under the second slider 24 to sandblast the surface of the galvanized pipe 12. During sandblasting, the second slider 24 moves slowly on the slide 4, and the high temperature resistant rubber rod 11 is also rotating to ensure that the surface of the pipe 12 can be completely processed; sandblasting is used to remove dirt on the surface of the zinc layer and smooth out uneven surfaces. The surface temperature of the pipe 12 is increased during hot dip galvanizing, which can make the dirt softer and easier to remove by sandblasting, and make the surface of the zinc layer have a certain degree of roughness. When spraying the anti-corrosion coating later, the adhesion between the anti-corrosion coating and the surface of the pipe 12 can be enhanced, thereby improving the anti-corrosion effect.

[0047] After the sandblasting surface is completed, start the first slider 21 and the paint spray gun 22. At this time, the adjustable baffle 23 rotates to the left, the amount of paint sprayed at the pipe mouth is large, and the painting speed is fast. Apply a layer of primer first. At this time, the surface of the pipe 12 still has a certain residual temperature, and the paint is more likely to flow and penetrate into the tiny depressions on the surface of the pipe 12 caused by sandblasting, forming a more uniform and firm anti-corrosion coating. In addition, when there is a certain temperature, the drying speed of the paint will also be accelerated, which is beneficial to improving the quality and durability of the coating; when the upper surface of the pipe 12 is coated with primer and dried, start the drive motor 9 to rotate the high-temperature resistant rubber rod 11, drive the pipe 12 to rotate and turn the lower surface over, and continue spraying, so that all places on the surface of the pipe 12 can be sprayed, and there are no dead corners and blank areas caused by clamping.

[0048] Since it is very difficult to replace the pipelines used on the seabed, during the process of applying the primer, mid-coat and topcoat according to the above method (while waiting for the paint to dry), the paint spray head 20 also sprays paint on the inside of the pipeline 12. The position of the screw rod 19 is initially at the leftmost end of the pipeline 12. The screw rod lifter 18 is started to drive the screw rod 19 to rotate and move to the right. The paint spray head 20 will also rotate and move at a uniform speed with the screw rod 19, and evenly apply a layer of paint to the inside of the pipeline 12. Applying anti-corrosion paint can protect the internal structure of the pipeline 12, extend its service life, and improve its safety and stability.

[0049] After all the basic painting is completed, since the welding joint 13 is more easily eroded by seawater and once eroded, the speed will be faster than other areas, the adjustable baffle 23 is adjusted to rotate right, the painting pressure of the pipe mouth is increased, and the painting distance is more concentrated. The wavy reinforcement coating 14 is sprayed on the welding joint 13 of the pipeline 12. First, spray an extra layer of paint to strengthen the protection of the welding joint 13; second, reduce the impact of seawater flow on the anti-corrosion layer, thereby extending the service life of the anti-corrosion layer.

[0050] At the same time, hot-dip galvanizing and anti-corrosion coatings form two protective layers for the pipeline 12, respectively, providing a double physical isolation layer. The zinc coating can provide effective protection for the metal substrate, while the anti-corrosion coating forms a second protective layer on the zinc coating. The double protective layer can more effectively prevent the corrosion of corrosive media such as seawater and oxygen on the metal of the pipeline 12; when the anti-corrosion coating is damaged, the zinc coating acts as a metal anode to attract oxygen and chloride ions in the seawater, protecting the metal substrate of the pipeline 12 while preventing the expansion of the damaged area of ​​the anti-corrosion coating.

[0051] After the treatment is completed, the sealing door on the side of the workbench 5 is opened, and the work of taking out the pipe 12 is completed.

[0052] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A paint spraying device for anti-corrosion of marine engineering pipelines, comprising a first bracket (1), a second bracket (2) and a pipeline (12), wherein a workbench (5) is arranged between the first bracket (1) and the second bracket (2), and characterized in that: Also included are: A working trough, the working trough being arranged inside the upper part of the working table (5), and a material discharge trough (8) being arranged at the middle position of the bottom wall of the working trough; A circulating supply mechanism, the circulating supply mechanism being arranged on one side of the workbench (5) and being used for inputting and outputting hot-dip galvanized material into and out of the working tank; A driving motor (9), wherein two groups of the driving motors (9) are arranged in parallel, and the two groups of the driving motors (9) are fixedly mounted on the first bracket (1), and the output end of the driving motor (9) is key-connected with a driving shaft (10), and the end of the driving shaft (10) away from the driving motor (9) rotates through the side wall of one end of the workbench (5) and is rotatably connected to the inner wall of the other end of the workbench (5), and a section of the outer fixed sleeve of the driving shaft (10) located inside the working groove is provided with a high-temperature resistant rubber rod (11), and the pipe (12) is placed on the upper surface of the two high-temperature resistant rubber rods (11); A mounting frame (3), the mounting frame (3) being fixedly connected to the top ends of the first bracket (1) and the second bracket (2), and the mounting frame (3) being respectively provided with a sandblasting part and a painting part; A welding point (13) is provided at the middle position of the pipe (12), and a wave-shaped reinforcement coating (14) is evenly sprayed on the surface of the welding point (13); Slide grooves (4) are provided on both sides of the mounting frame (3); the paint spraying unit comprises a first sliding block (21) slidably connected to the inside of the sliding block (4); a paint spraying gun (22) is fixedly mounted on the lower end of the first sliding block (21); and an input end of the paint spraying gun (22) is connected to an external paint supply device; An adjustable baffle (23) for controlling the flow rate of paint spraying is installed at the output end of the paint spraying gun (22).

2. The anti-corrosion paint spraying equipment for marine engineering pipelines according to claim 1 is characterized in that: A plurality of support columns (6) are fixedly connected to the lower end surface of the workbench (5), and the plurality of support columns (6) are used to support the workbench (5).

3. The anti-corrosion paint spraying equipment for marine engineering pipelines according to claim 1 is characterized in that: The circulation supply mechanism comprises a liquid storage tank (15), wherein molten zinc water at a temperature of 450° C. is stored in the liquid storage tank (15), an output end of the liquid storage tank (15) is fixedly connected to a liquid inlet pipe (16), an end of the liquid inlet pipe (16) away from the liquid storage tank (15) is fixedly connected to the inside of the working tank, and a liquid return pipe (17) is fixedly connected between the input end of the liquid storage tank (15) and the feed tank (8).

4. The paint spraying equipment for anti-corrosion of marine engineering pipelines according to claim 1 is characterized in that: The sandblasting section comprises a second sliding block (24) slidably connected to the inside of the slide groove (4), a sandblasting gun (25) is fixedly mounted on the lower end of the second sliding block (24), and an input end of the sandblasting gun (25) is connected to an external sand supply device.

5. The anti-corrosion paint spraying equipment for marine engineering pipelines according to claim 1 is characterized in that: A screw lift (18) is fixedly mounted on the second bracket (2), and a screw (19) is arranged at the output end of the screw lift (18). The end of the screw (19) close to the workbench (5) rotates through the side wall of the workbench (5) and then extends into the working groove, and a paint spray head (20) is fixed to the end of the screw (19) located inside the working groove.

6. The anti-corrosion paint spraying equipment for marine engineering pipelines according to claim 1 is characterized in that: The rotation directions of the two drive motors (9) are exactly the same.

7. The anti-corrosion paint spraying equipment for marine engineering pipelines according to claim 1 is characterized in that: Inclined surfaces (7) for facilitating the collection of hot-dip galvanized materials are symmetrically arranged on both sides of the lower interior of the working tank.

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