A system for spraying anti-corrosion coating on the surface of steel pipes

Abstract

The invention relates to the technical field of metal processing, and discloses a system for spraying an anti-corrosion coating on the surface of a steel pipe, comprising a base, a spraying chamber, an electrically controlled movable frame and a steel pipe, wherein the electrically controlled movable frame is driven to be slidably connected to the upper surface of the base, the spraying chamber is fixedly connected to the upper surface of the base, the steel pipe is plugged into the interior of the electrically controlled movable frame, and a spray cleaning component for preventing residual material on the surface of a nozzle from dripping is arranged inside the spraying chamber; when the paint inside the equipment is pressurized, a baffle is pushed, and the baffle drives a gear rod and a hollow pipe to move together, so that the baffle no longer blocks the inside of the hollow pipe, thereby avoiding the problem that the paint that is not completely sprayed out of the connecting pipe flows out to the outside through the hollow pipe, and at the same time, ensuring that the paint is sprayed out through the hollow pipe only when the booster pump is in the working state, thereby avoiding the paint flowing out due to excessive filling inside the equipment, and improving the sealing effect of the paint inside the hollow pipe.

Description

Technical Field

[0001] The invention relates to the technical field of metal processing, in particular to a system for spraying an anti-corrosion coating on the surface of a processed steel pipe. Background Art

[0002] Steel pipe anti-corrosion is to apply paint evenly and densely on the surface of the rust-removed metal pipe to isolate it from various corrosive media. It is one of the most basic methods of pipeline anti-corrosion. There are many types of anti-corrosion coatings with different properties and uses. The coating technology is to form a continuous covering layer of insulating material on the metal surface to insulate the metal from the electrolyte in direct contact with it so that the electrochemical reaction cannot occur normally.

[0003] In the existing anti-corrosion coating spray system, a large amount of paint residue will be attached to the inner and outer walls of the nozzle before and after spraying. The paint remaining on the outer wall of the nozzle will still drip along the surface of the nozzle to the pipe to be sprayed after the equipment stops spraying, affecting the uniformity of the anti-corrosion coating sprayed on the pipe surface and the smoothness of the steel pipe surface. The nozzle is in a high-pressure state during spraying and is prone to deformation due to the influence of high pressure. After long-term use, it is easy to fail to spray paint normally due to deformation, which reduces the service life of the nozzle. At the same time, the existing spray system cannot spray the inner and outer walls of the pipe synchronously, which makes the anti-corrosion spraying work efficiency low.

[0004] Therefore, a system for spraying anti-corrosion coating on the surface of steel pipe is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a system for spraying an anti-corrosion coating on the surface of a steel pipe to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a system for spraying an anti-corrosion coating on the surface of a steel pipe, comprising a base, a spraying bin, an electrically-controlled movable frame and a steel pipe, wherein the electrically-controlled movable frame is driven to slide and be connected to the upper surface of the base, the spraying bin is fixedly connected to the upper surface of the base, the steel pipe is inserted into the electrically-controlled movable frame, a spray cleaning component for preventing dripping of residual material on the surface of the nozzle is arranged inside the spraying bin, an exhaust component for contracting the nozzle after spraying is completed is arranged inside the spraying bin, and an internal spray component for spraying anti-corrosion on the inner wall of the steel pipe is arranged inside the spraying bin.

[0007] Preferably, the spray cleaning assembly includes connecting tubes distributed in a circular array and fixedly connected to the inner wall of the spray bin, the connecting tubes are fixedly connected to the ends away from the spray bin with sleeves, the interior of the sleeves are slidably connected to hollow tubes, the interior of the hollow tubes are rotatably connected to gear rods, the gear rods are fixedly connected to baffles on the outer wall of the hollow tubes, the side of the sleeves away from the connecting tubes is fixedly connected to a rack symmetrically about the axis of the sleeve, and the gear rods are meshed with the rack.

[0008] Preferably, the spray cleaning assembly also includes an L-shaped bracket symmetrically fixedly connected to the outer wall of the sleeve about the axis of the sleeve, the interior of the L-shaped bracket is rotatably connected to a cross bar, the side of the cross bar close to the L-shaped bracket is fixedly connected to a first spring, the end of the first spring away from the cross bar is fixedly connected to the outer wall of the L-shaped bracket, the end of the cross bar away from the L-shaped bracket is fixedly connected to a scraper, the lower surface of the scraper is fixedly connected to a collecting box, the outer wall of the hollow tube is fixedly connected to a protrusion symmetrically fixedly connected to the axis of the hollow tube, the side of the rack away from the sleeve is fixedly connected to a limiting plate, and the scraper is made of high temperature resistant rubber material.

[0009] Preferably, the vacuum assembly includes a nozzle fixedly connected to the side of the hollow tube away from the connecting tube, the outer wall of the nozzle is fixedly connected to a first hollow air pipe, the end of the first hollow air pipe away from the nozzle is fixedly connected to an airtight hollow cylinder, the outer wall of the sleeve is fixedly connected to an L-shaped support rod, the end of the L-shaped support rod located inside the airtight hollow cylinder is fixedly connected to a circular plate, and the circular plate is slidably connected to the inside of the airtight hollow cylinder.

[0010] Preferably, the vacuum assembly also includes a second hollow air pipe fixedly connected to a side of the circular plate close to the first hollow air pipe, an end of the second hollow air pipe close to the first hollow air pipe is slidably connected to the interior of the first hollow air pipe, an end of the airtight hollow cylinder away from the first hollow air pipe is rotatably connected to a one-way cover plate, an outer wall of the airtight hollow cylinder is fixedly connected to a slide plate, and the slide plate is slidably connected to the outer wall of the sleeve.

[0011] Preferably, the internal spraying assembly includes a threaded rod rotatably connected to the side of the electrically-controlled movable frame close to the spraying bin, a limiting rod is fixedly connected to the side of the electrically-controlled movable frame close to the spraying bin and located above the threaded rod, a feed pipe is wound inside the electrically-controlled movable frame, and a first annular liquid storage box is slidably connected to the outer wall of the threaded rod.

[0012] Preferably, the internal spraying assembly also includes a slider fixedly connected to the inner wall of the first annular liquid storage box, the slider is slidably connected to the inside of the threaded groove on the outer wall of the threaded rod, the end of the feed pipe away from the electrically-controlled movable frame is fixedly connected to the inside of the second annular liquid storage box, the interiors of the first annular liquid storage box and the second annular liquid storage box are connected, and a slide groove is provided on the side of the second annular liquid storage box close to the electrically-controlled movable frame.

[0013] Preferably, the internal spray assembly also includes a limiting sliding frame slidably connected to the outer wall of the limiting rod, the lower end of the limiting sliding frame is slidably connected to the inside of the slide groove of the second annular liquid storage box, the upper end of the limiting sliding frame is fixedly connected to a strong magnetic plate, the top of the inner wall of the spray bin is fixedly connected to an electromagnetic suction cup frame, and the lower side of the electromagnetic suction cup frame is fixedly connected to an electromagnetic suction cup.

[0014] Preferably, the internal spray assembly also includes a drainage tube symmetrically fixedly connected to the outer wall of the first annular liquid storage box with the first annular liquid storage box as the center, the first annular liquid storage box is rotatably connected to the second annular liquid storage box on the side close to the electrically-controlled movable frame, the end of the drainage tube away from the first annular liquid storage box is fixedly connected to a strip spray plate, the drainage tube is connected to the feed pipe through the first annular liquid storage box, the end of the feed pipe located inside the electrically-controlled movable frame is fixedly connected to a booster spray pump, the electromagnetic suction cup frame is electrically connected to the internal power supply of the spray bin, and a sealing ring is provided at the rotating connection between the first annular liquid storage box and the second annular liquid storage box.

[0015] Preferably, the outer wall of the circular plate fits tightly against the inner wall of the airtight hollow cylinder, the outer wall of the second hollow air pipe fits tightly against the inner wall of the first hollow air pipe, the nozzle is made of high temperature resistant rubber material, a power supply is provided inside the base, a booster pump is provided inside the spray chamber, and the power supply is electrically connected to the booster pump.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. In the prior art, the paint inside the hollow tube is sprayed only by starting and stopping the pump. After the pump stops pressurizing, the paint remaining inside the hollow tube will continue to drip. The inclined surface of the scraper close to the toothed rod will scrape the paint remaining on the nozzle surface through the inclined surface when the two scrapers are relatively close to each other, so as to prevent the paint from adhering to the nozzle surface for a long time and clogging the nozzle after solidification, thereby preventing the occurrence of uneven spraying due to nozzle clogging and prolonging the service life of the nozzle. The inside of the hollow tube is sealed after the two scrapers are closed, which can prevent the paint remaining inside the hollow tube from clogging. While the material drips outward, the inside of the hollow tube can be isolated from the outside world, preventing the unsprayed paint from coming into contact with the outside air inside the hollow tube and oxidizing, further preventing the paint from being oxidized and causing a decrease in anti-corrosion performance, and improving the anti-corrosion effect of the paint on the steel pipe after it is sprayed on the surface of the steel pipe. The scraper rubs the surface of the nozzle before spraying to make the nozzle surface smoother before spraying, reducing the resistance of the pigment or paint during the spraying process, thereby improving the uniformity and quality of the spraying. The scraper rubs and cleans the nozzle, which can reduce the waste of spraying materials caused by blockage and improve the spraying efficiency and cost-effectiveness.

[0018] 2. Compared with the straight magnetic plates in the prior art, the arc-shaped structure can provide more concentrated and uniform magnetic fields, thereby enhancing the adsorption force when adsorbed to each other, making it more difficult for the two magnetic plates to be separated by external forces. When the straight magnets are adsorbed to each other, the adsorption force may be relatively weak due to the limited contact area. The design of the arc-shaped structure can reduce the magnetic leakage at the edge, reducing the risk of accidental touch and accidental injury. In contrast, when the straight magnets are adsorbed to each other, there may be a strong edge magnetic field, which is easy to cause accidental contact. The L-shaped design of the drainage tube allows the paint to be When passing through the inside of the drainage tube, part of the paint will be blocked by the angle of the drainage tube and flow back. At this time, the paint continuously transported inside the drainage tube will impact and collide with each other at the angle end of the drainage tube, so that the sediment in the paint can be evenly mixed during the impact. The collision of the paint in the angle of the drainage tube can reduce the speed of the strip spray plate when it is sprayed out, further avoiding the impact force of the paint being too large when spraying on the inner wall of the steel pipe, which will cause an impact on the thickness of the anti-corrosion coating already formed on the inner wall of the steel pipe, and avoiding the already formed anti-corrosion coating being worn due to excessive impact force when spraying the paint.

[0019] 3. When the nozzle is sprayed at high pressure for a long time, the nozzle will be in a deformed state due to the pressure generated when the paint is sprayed out at high speed. When the scraper slides on the surface of the nozzle, the nozzle will be subjected to the opposite force to that during spraying and bend toward the inside of the hollow tube. By squeezing the nozzle toward the inside of the hollow tube after the nozzle stops spraying, the stress deformation generated by the nozzle during spraying can be eliminated through the squeezing action of the scraper, further reducing the deformation of the nozzle after long-term use and improving the accuracy of the nozzle during spraying.

[0020] 4. The closed space formed by the one-way cover plate and the circular plate inside the airtight hollow cylinder is increased in volume due to the sliding action of the circular plate inside the airtight hollow cylinder, thereby generating negative pressure. The pressure difference enables the airtight hollow cylinder to extract the paint remaining inside the nozzle. The L-shape of the first hollow air pipe and the limit sliding design of the airtight hollow pipe on the outer wall of the hollow pipe enable the first hollow air pipe to always remain connected with the nozzle by deformation when the nozzle contracts, thereby further reducing the risk of the first hollow air pipe breaking when the nozzle contracts and increasing the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a side view schematic diagram of the overall structure of the present invention;

[0023] Figure 3 It is a schematic top view of the overall structure of the present invention;

[0024] Figure 4 It is a partial schematic diagram of the one-way cover plate structure of the present invention;

[0025] Figure 5 For the present invention Figure 4 A schematic diagram of the structure enlargement in the middle;

[0026] Figure 6 This is a schematic diagram of the overall structure of the spray cleaning assembly of the present invention;

[0027] Figure 7 It is a schematic cross-sectional view of the structure of the spray cleaning assembly of the present invention;

[0028] Figure 8 It is a schematic cross-sectional view of the structure of the air extraction component of the present invention;

[0029] Fig. 9 It is a schematic cross-sectional view of the structure of the internal spraying assembly of the present invention;

[0030] Fig.10 It is a schematic diagram of the overall structure of the internal spraying assembly of the present invention.

[0031] In the figure:

[0032] 11. Base; 12. Spraying chamber; 13. Electric control mobile frame; 14. Steel pipe;

[0033] The spray cleaning assembly includes: 21, a connecting pipe; 22, a sleeve; 23, a hollow pipe; 24, a gear rod; 25, a baffle; 26, a rack; 27, an L-shaped bracket; 28, a cross bar; 29, a first spring; 210, a scraper; 211, a collection box; 212, a bump;

[0034] The air extraction assembly includes: 31, nozzle; 32, first hollow air pipe; 33, airtight hollow cylinder; 34, one-way cover plate; 35, slide plate; 36, L-shaped support rod; 37, round plate; 38, second hollow air pipe;

[0035] The internal spraying assembly includes: 41, threaded rod; 42, limiting rod; 43, feeding pipe; 44, electromagnetic suction cup frame; 45, limiting sliding frame; 46, first annular liquid storage box; 47, drainage pipe; 48, strip spraying plate; 49, second annular liquid storage box. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Embodiments of the present invention

[0038] See also Figures 1 to 9 A system for spraying an anti-corrosion coating on the surface of a steel pipe includes a base 11, a spraying chamber 12, an electrically controlled movable frame 13 and a steel pipe 14. The electrically controlled movable frame 13 is driven to slide and connect to the upper surface of the base 11. The spraying chamber 12 is fixedly connected to the upper surface of the base 11. The steel pipe 14 is plugged into the electrically controlled movable frame 13. A spray cleaning component for preventing residual material from dripping on the surface of the nozzle is provided inside the spraying chamber 12. An exhaust component for shrinking the nozzle after spraying is completed is provided inside the spraying chamber 12. An internal spray component for spraying an anti-corrosion coating on the inner wall of the steel pipe 14 is provided inside the spraying chamber 12. A power supply is provided inside the base 11. A booster pump is provided inside the spraying chamber 12. The power supply is electrically connected to the booster pump.

[0039] The spray cleaning assembly includes a connecting pipe 21 distributed in an annular array and fixedly connected to the inner wall of the spray tank 12. The connecting pipe 21 is fixedly connected to a sleeve 22 at one end away from the spray tank 12. The inside of the sleeve 22 is slidably connected to a hollow tube 23. The inside of the hollow tube 23 is rotatably connected to a gear rod 24. The gear rod 24 is located on the outer wall of the hollow tube 23 and is fixedly connected to a baffle 25. The side of the sleeve 22 away from the connecting pipe 21 is symmetrically fixedly connected to a rack 26 about the axis of the sleeve 22. The rack rod 24 and the rack 26 are meshed with each other. The outer wall of the sleeve 22 is symmetrically fixedly connected to an L-shaped support 25 about the axis of the sleeve 22. The L-shaped bracket 27 is rotatably connected to a cross bar 28 inside, a side of the cross bar 28 close to the L-shaped bracket 27 is fixedly connected to a first spring 29, an end of the first spring 29 away from the cross bar 28 is fixedly connected to the outer wall of the L-shaped bracket 27, an end of the cross bar 28 away from the L-shaped bracket 27 is fixedly connected to a scraper 210, a lower surface of the scraper 210 is fixedly connected to a collecting box 211, an outer wall of the hollow tube 23 is fixedly connected to a protrusion 212 symmetrically about the axis of the hollow tube 23, a side of the rack 26 away from the sleeve 22 is fixedly connected to a limit plate, and the scraper 210 is made of high temperature resistant rubber material.

[0040] The scraper 210 is made of high temperature resistant rubber material to prevent the nozzle 31 from being worn when rubbing against the outer wall of the nozzle 31;

[0041] More preferably, when the hollow tube 23 slides inside the sleeve 22 toward the side away from the connecting tube 21, the protrusion 212 on the outer wall of the hollow tube 23 will squeeze the cross bar 28. After being squeezed by the protrusion 212, the cross bar 28 will rotate around the rotating connection with the L-shaped bracket 27. The first spring 29 is squeezed by the rotation of the cross bar 28 and elastically contracts. After the rotation of the cross bar 28, it drives the scraper 210 and the collecting box 211 to rotate together. After the rotation of the scraper 210, it no longer blocks the nozzle 31. The pressurized paint is sprayed toward the outer wall of the steel pipe 14 through the hollow tube 23 and the nozzle 31. When the hollow tube 23 slides, it drives the nozzle 31 to rub against the outer wall of the scraper 210.

[0042] The air extraction component includes a nozzle 31 fixedly connected to the side of the hollow tube 23 away from the connecting tube 21, the outer wall of the nozzle 31 is fixedly connected to the first hollow air pipe 32, the end of the first hollow air pipe 32 away from the nozzle 31 is fixedly connected to the airtight hollow cylinder 33, the outer wall of the sleeve 22 is fixedly connected to an L-shaped support rod 36, the end of the L-shaped support rod 36 located inside the airtight hollow cylinder 33 is fixedly connected to a circular plate 37, the circular plate 37 is slidably connected to the inside of the airtight hollow cylinder 33, and the side of the circular plate 37 close to the first hollow air pipe 32 is fixedly connected to the second airtight hollow cylinder 33. The second hollow air pipe 38 is slidably connected to the inside of the first hollow air pipe 32 at one end of the airtight hollow tube 33 which is close to the first hollow air pipe 32; the one end of the airtight hollow tube 33 which is away from the first hollow air tube 32 is rotatably connected to a one-way cover plate 34; the outer wall of the airtight hollow tube 33 is fixedly connected to a slide plate 35; the slide plate 35 is slidably connected to the outer wall of the sleeve 22; the outer wall of the circular plate 37 is tightly fitted to the inner wall of the airtight hollow tube 33; the outer wall of the second hollow air pipe 38 is tightly fitted to the inner wall of the first hollow air pipe 32; and the nozzle 31 is made of high temperature resistant rubber.

[0043] The internal spraying assembly includes a threaded rod 41 which is rotatably connected to the side of the electric-controlled moving frame 13 close to the spraying bin 12, a limiting rod 42 is fixedly connected to the side of the electric-controlled moving frame 13 close to the spraying bin 12 and located above the threaded rod 41, a feed pipe 43 is wound inside the electric-controlled moving frame 13, an outer wall of the threaded rod 41 is slidably connected to a first annular liquid storage box 46, an inner wall of the first annular liquid storage box 46 is fixedly connected to a slider, the slider is slidably connected to the inside of the threaded groove on the outer wall of the threaded rod 41, one end of the feed pipe 43 away from the electric-controlled moving frame 13 is fixedly connected to the inside of a second annular liquid storage box 49, the insides of the first annular liquid storage box 46 and the second annular liquid storage box 49 are connected, a slide groove is provided on the side of the second annular liquid storage box 49 close to the electric-controlled moving frame 13, the outer wall of the limiting rod 42 is slidably connected to a limiting sliding frame 45, and the lower end of the limiting sliding frame 45 is slidably connected to the second annular storage Inside the slide groove of the liquid box 49, the upper end of the limiting sliding frame 45 is fixedly connected to a strong magnetic plate, the top of the inner wall of the spray chamber 12 is fixedly connected to an electromagnetic suction cup frame 44, and the lower side of the electromagnetic suction cup frame 44 is fixedly connected to an electromagnetic suction cup. The outer wall of the first annular liquid storage box 46 is symmetrically fixedly connected with a drainage tube 47 with the first annular liquid storage box 46 as the center. The first annular liquid storage box 46 is rotatably connected to the second annular liquid storage box 49 on the side close to the electrically controlled movable frame 13. The drainage tube 47 is fixedly connected to a strip spray plate 48 at one end away from the first annular liquid storage box 46. The drainage tube 47 is connected to the feed pipe 43 through the first annular liquid storage box 46. The feed pipe 43 is fixedly connected to a booster spray pump at one end inside the electrically controlled movable frame 13. The electromagnetic suction cup frame 44 is electrically connected to the internal power supply of the spray chamber 12, and a sealing ring is provided at the rotating connection between the first annular liquid storage box 46 and the second annular liquid storage box 49.

[0044] The above implementation works as follows:

[0045] The initialization steps are as follows:

[0046] The staff slides the electric-controlled moving frame 13 on the upper surface of the base 11 to a side away from the spray chamber 12 .

[0047] The working steps are as follows:

[0048] The steel pipe 14 is sprayed by the spray cleaning assembly:

[0049] like Figures 1 to 8 As shown, the staff installs the steel pipe 14 that needs to be sprayed with the anti-corrosion coating on the side of the electric control mobile frame 13 close to the spray chamber 12. When the steel pipe 14 is installed, the staff starts the power supply inside the spray chamber 12. After the power supply inside the spray chamber 12 is started, the booster pump inside the spray chamber 12 is energized. After the booster pump is energized, the paint is pressurized and transported to the inside of the connecting pipe 21. When the paint is transported to the inside of the hollow tube 23 through the connecting pipe 21 and the sleeve 22, the baffle 25 is connected to the inside of the hollow tube 23 due to the rotation. The pressurized paint pushes the baffle 25 inside the hollow tube 23, and the baffle 25 is squeezed by the paint and will generate a The potential energy of the movement of the baffle 25 away from the connecting tube 21 is generated. At this time, because the baffle 25 is rotatably connected to the inside of the hollow tube 23, and the hollow tube 23 is slidably connected to the inside of the sleeve 22, the potential energy of the movement of the baffle 25 will drive the hollow tube 23 to slide inside the sleeve 22 to the side away from the connecting tube 21. During the movement of the hollow tube 23, the gear rod 24 and the baffle 25 inside it will be driven to move together. When the gear rod 24 moves to mesh with the rack 26, the continued movement of the hollow tube 23 will cause the gear rod 24 to mesh with the rack 26 and rotate. The rotation of the gear rod 24 drives the baffle 25 to rotate together. After the baffle 25 rotates, it no longer blocks the pressurized paint.

[0050] When the hollow tube 23 slides inside the sleeve 22 toward the side away from the connecting tube 21, the protrusion 212 on the outer wall of the hollow tube 23 will squeeze the cross bar 28. After being squeezed by the protrusion 212, the cross bar 28 will rotate around the rotation connection with the L-shaped bracket 27. The first spring 29 is squeezed by the rotation of the cross bar 28 and elastically contracts. After the cross bar 28 rotates, it drives the scraper 210 and the collecting box 211 to rotate together. After the scraper 210 rotates, it no longer blocks the nozzle 31. The pressurized paint is sprayed toward the outer wall of the steel pipe 14 through the hollow tube 23 and the nozzle 31. When the hollow tube 23 slides, it drives the nozzle 31 to rub against the outer wall of the scraper 210, so that the paint remaining on the surface of the nozzle 31 is cleaned, so as to avoid the agglomeration caused by the solidification of the paint in the previous work from blocking the paint spraying at the current stage.

[0051] When the paint starts to be sprayed onto the outer wall of the steel pipe 14 through the nozzle 31, the staff controls the electric-controlled moving frame 13 to slide on the upper surface of the base 11, so that the electric-controlled moving frame 13 drives the steel pipe 14 to move into the spraying chamber 12, so that the outer wall of the steel pipe 14 can be sprayed with anti-corrosion paint.

[0052] When the paint inside the equipment is pressurized, the baffle 25 is pushed. As the baffle 25 drives the gear rod 24 and the hollow tube 23 to move together, the gear rod 24 and the rack 26 are meshed and flipped, so that the baffle 25 no longer blocks the inside of the hollow tube 23, avoiding the problem of paint that has not been completely sprayed out of the connecting tube 21 flowing out to the outside through the hollow tube 23. At the same time, it ensures that the paint will be sprayed out through the hollow tube 23 only when the booster pump is in working state, avoiding the paint from flowing out due to excessive filling inside the equipment, thereby improving the sealing effect of the paint inside the hollow tube 23.

[0053] The inner wall of the steel pipe 14 is sprayed with anti-corrosion coating by the internal spraying assembly:

[0054] like Fig. 9 and Fig.10 As shown, after the booster spray pump inside the electric-controlled movable frame 13 is started, the paint is sprayed toward the inner wall of the steel pipe 14 through the feed pipe 43, the first annular liquid storage box 46, the drainage pipe 47 and the strip-shaped spray plate 48. After the power supply inside the spray chamber 12 is energized, the electromagnetic suction cup of the electromagnetic suction cup frame 44 generates a strong magnet and adsorbs the strong magnetic plate at the upper end of the limit sliding frame 45. The limit sliding frame 45 is magnetically adsorbed by the strong magnetic plate of the electromagnetic suction cup frame 44 and the limiting influence of the limiting rod 42 to maintain a vertical state and is always located directly below the electromagnetic suction cup frame 44. Because the slider on the inner wall of the first annular liquid storage box 46 is slidably connected to the inside of the threaded groove opened on the outer wall of the threaded rod 41, the lower end of the limit sliding frame 45 is limited to slide in the inside of the slide groove of the second annular liquid storage box 49. Therefore, when the electric-controlled movable frame 13 slides on the upper surface of the base 11, the electric-controlled movable frame 13 The movement of the movable frame 13 drives the limit rod 42 and the threaded rod 41 to move together. The movement of the threaded rod 41 causes the slider on the inner wall of the first annular liquid storage box 46 to slide inside the threaded groove on the outer wall of the threaded rod 41. When the slider slides, it will drive the first annular liquid storage box 46 to rotate together. Because the second annular liquid storage box 49 is connected to the inside of the first annular liquid storage box 46 and is in a rotational connection relationship, the second annular liquid storage box 49 will not rotate with the first annular liquid storage box 46. As the electrically-controlled movable frame 13 moves toward the side close to the spraying bin 12, the length of the feed pipe 43 is gradually shortened and rolled up inside the electrically-controlled movable frame 13. The first annular liquid storage box 46 drives the strip spray plate 48 to rotate and spray inside the steel pipe 14, and the electrically-controlled movable frame 13 drives the steel pipe 14 to translate, so that the anti-corrosion paint is evenly sprayed on the inner wall of the steel pipe 14.

[0055] The electromagnetic suction cup at the lower end of the electromagnetic suction cup frame 44 magnetically adsorbs the strong magnetic plate at the upper end of the second annular liquid storage box 49, so that when the threaded rod 41 moves laterally, the first annular liquid storage box 46 sliding on the outer wall of the threaded rod 41 is always located directly below the electromagnetic suction cup frame 44, and the slider on the inner wall of the first annular liquid storage box 46 slides inside the threaded groove opened on the surface of the threaded rod 41, so that when the threaded rod 41 moves laterally, it can drive the first annular liquid storage box 46 to rotate through the slider on the inner wall of the first annular liquid storage box 46, so that the drainage tube 47 and the strip spray plate 48 fixedly connected to the first annular liquid storage box 46 can rotate on the inner wall of the steel pipe 14, thereby realizing the synchronous anti-corrosion spraying work on the inside and outside of the steel pipe 14 during the operation of the equipment, thereby improving the working efficiency of the equipment for anti-corrosion spraying of the steel pipe 14.

[0056] Prevent paint dripping by spraying clean components:

[0057] like Figure 6 and Figure 7 As shown, when the spraying work is completed, the staff stops the booster pump inside the spray chamber 12 from pressurizing the paint, and the hollow tube 23 is no longer subjected to the high pressure formed by the paint inside the hollow tube 23 during spraying. At this time, the first spring 29 elastically stretches and drives the scraper 210 and the collecting box 211 to rotate through the cross bar 28. The rotation of the cross bar 28 squeezes the protrusion 212, and the cross bar 28 rotates and drives the hollow tube 23 to move to the side close to the connecting tube 21 through the protrusion 212. When the hollow tube 23 moves, it drives the gear rod 24 to mesh and rotate with the rack 26. The rotation of the gear rod 24 drives the baffle 25 to rotate together and restores the baffle 25 to block the inside of the hollow tube 23. The scraper 210 will scrape off the paint remaining on the surface of the nozzle 31 when rotating, and the paint scraped off the outer wall of the nozzle 31 by the scraper 210 will fall into the inside of the collecting box 211, so that after the spraying is completed, the paint will not drip to the outer wall of the steel pipe 14 due to the residual paint inside the hollow tube 23.

[0058] When the hollow tube 23 slides inside the sleeve 22 toward the side close to the connecting tube 21, the first spring 29 elastically stretches, and the elastic stretch of the first spring 29 drives the cross bar 28, the scraper 210 and the collecting box 211 to rotate, so that the scraper 210 scrapes the outer wall of the nozzle 31, so that the paint remaining on the surface of the nozzle 31 after spraying can be cleaned in time, to avoid the paint adhering to the surface of the nozzle 31 for a long time and solidifying, to avoid the paint blocking the nozzle 31 when spraying after solidification, and to clean the paint remaining on the surface of the nozzle 31. At the same time, the paint can avoid corrosion of the nozzle 31 by the paint, thereby increasing the service life of the nozzle 31. The collecting box 211 can store the paint scraped off by the scraper 210, to avoid the paint dripping directly on the outer wall of the steel pipe 14 after being scraped off, to ensure that the anti-corrosion paint on the outer wall of the steel pipe 14 is sprayed evenly.

[0059] The residual inside the hollow tube 23 is extracted by the exhaust assembly:

[0060] like Figure 6 and Figure 8 As shown in the figure, when the hollow tube 23 slides toward the side close to the connecting tube 21, the movement of the hollow tube 23 will drive the nozzle 31, the first hollow air tube 32, the airtight hollow cylinder 33 and the one-way cover plate 34 to move together. In the process of the airtight hollow cylinder 33 moving toward the connecting tube 21, the second hollow air tube 38 will slide toward the inside of the first hollow air tube 32, and the closed space formed by the circular plate 37 and the one-way cover plate 34 inside the airtight hollow cylinder 33 increases in capacity and generates negative pressure, so that the airtight hollow cylinder 33 passes through the second hollow air tube 38 and the first hollow air tube. The air core 32 draws air into the hollow tube 23 and the nozzle 31. The opening of the nozzle 31 is blocked by the scraper 210 and is in a closed state. After the airtight hollow cylinder 33 draws air into the hollow tube 23, the residual paint in the hollow tube 23 is drawn out of the hollow tube 23. After the hollow tube 23 is drawn, negative pressure is formed, causing the nozzle 31 to deform and shrink. The nozzle 31, which is in a high-pressure expansion state for a long time during spraying, can quickly return to its original state, thereby preventing the nozzle 31 from deforming after long-term use and affecting the spraying effect.

[0061] By sliding the circular plate 37 inside the airtight hollow cylinder 33, the volume of the closed space formed by the one-way cover plate 34 and the circular plate 37 inside the airtight hollow cylinder 33 increases to generate negative pressure. The negative pressure inside the airtight hollow cylinder 33 extracts the paint remaining inside the nozzle 31 through the second hollow air pipe 38 and the first hollow air pipe 32, so as to prevent the paint inside the nozzle 31 from solidifying and clogging the nozzle 31. At the same time, by extracting the inside of the nozzle 31, the nozzle 31 is elastically contracted, so that the nozzle 31 under high pressure during operation can shrink in the opposite direction, thereby reducing the deformation of the nozzle 31 caused by the high pressure stress and increasing the service life of the nozzle 31.

[0062] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0063] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A system for spraying an anti-corrosion coating on the surface of a steel pipe, comprising a base (11), a spray chamber (12), an electrically controlled mobile frame (13) and a steel pipe (14), characterized in that: The electrically controlled movable frame (13) is driven to slide and connect to the upper surface of the base (11); the spray chamber (12) is fixedly connected to the upper surface of the base (11); the steel pipe (14) is plugged into the electrically controlled movable frame (13); a spray cleaning component for preventing residual material from dripping on the surface of the nozzle is arranged inside the spray chamber (12); an exhaust component for shrinking the nozzle after spraying is completed is arranged inside the spray chamber (12); and an internal spray component for spraying the inner wall of the steel pipe (14) for anti-corrosion is arranged inside the spray chamber (12); The spray cleaning assembly comprises connecting pipes (21) distributed in an annular array and fixedly connected to the inner wall of the spray chamber (12); one end of the connecting pipe (21) away from the spray chamber (12) is fixedly connected to a sleeve (22); the interior of the sleeve (22) is slidably connected to a hollow pipe (23); the interior of the hollow pipe (23) is rotatably connected to a gear rod (24); the gear rod (24) is fixedly connected to a baffle (25) on the outer wall of the hollow pipe (23); a side of the sleeve (22) away from the connecting pipe (21) is fixedly connected to a rack (26) symmetrically about the axis of the sleeve (22); the rack rod (24) and the rack (26) are meshed with each other; The spray cleaning assembly also includes an L-shaped bracket (27) fixedly connected to the outer wall of the sleeve (22) symmetrically about the axis of the sleeve (22); the interior of the L-shaped bracket (27) is rotatably connected to a cross bar (28); the side of the cross bar (28) close to the L-shaped bracket (27) is fixedly connected to a first spring (29); the end of the first spring (29) away from the cross bar (28) is fixedly connected to the outer wall of the L-shaped bracket (27); the end of the cross bar (28) away from the L-shaped bracket (27) is fixedly connected to a scraper (210); the lower surface of the scraper (210) is fixedly connected to a collection box (211); the outer wall of the hollow tube (23) is fixedly connected to a protrusion (212) symmetrically about the axis of the hollow tube (23); the side of the rack (26) away from the sleeve (22) is fixedly connected to a limit plate; the scraper (210) is made of high-temperature resistant rubber material.

2. A system for spraying an anti-corrosion coating on the surface of a steel pipe according to claim 1, characterized in that: The air extraction assembly comprises a nozzle (31) fixedly connected to a side of the hollow tube (23) away from the connecting tube (21); the outer wall of the nozzle (31) is fixedly connected to a first hollow air tube (32); one end of the first hollow air tube (32) away from the nozzle (31) is fixedly connected to an airtight hollow cylinder (33); the outer wall of the sleeve (22) is fixedly connected to an L-shaped support rod (36); one end of the L-shaped support rod (36) located inside the airtight hollow cylinder (33) is fixedly connected to a circular plate (37); and the circular plate (37) is slidably connected to the inside of the airtight hollow cylinder (33).

3. A system for spraying an anti-corrosion coating on the surface of a steel pipe according to claim 2, characterized in that: The air extraction assembly further comprises a second hollow air pipe (38) fixedly connected to a side of the circular plate (37) close to the first hollow air pipe (32); one end of the second hollow air pipe (38) close to the first hollow air pipe (32) is slidably connected to the interior of the first hollow air pipe (32); one end of the airtight hollow cylinder (33) away from the first hollow air pipe (32) is rotatably connected to a one-way cover plate (34); an outer wall of the airtight hollow cylinder (33) is fixedly connected to a slide plate (35); and the slide plate (35) is slidably connected to the outer wall of the sleeve (22).

4. The system for spraying an anti-corrosion coating on the surface of a steel pipe according to claim 1, characterized in that: The internal spraying assembly comprises a threaded rod (41) rotatably connected to a side of the electrically controlled mobile frame (13) close to the spraying chamber (12); a limiting rod (42) is fixedly connected to the side of the electrically controlled mobile frame (13) close to the spraying chamber (12) and located above the threaded rod (41); a material conveying pipe (43) is wound inside the electrically controlled mobile frame (13); and a first annular liquid storage box (46) is slidably connected to the outer wall of the threaded rod (41).

5. The system for spraying an anti-corrosion coating on the surface of a steel pipe according to claim 4, characterized in that: The internal spraying assembly further comprises a slider fixedly connected to the inner wall of the first annular liquid storage box (46), the slider being slidably connected to the inside of the threaded groove on the outer wall of the threaded rod (41), the end of the feed pipe (43) away from the electrically-controlled movable frame (13) being fixedly connected to the inside of the second annular liquid storage box (49), the insides of the first annular liquid storage box (46) and the second annular liquid storage box (49) being connected, and a slide groove being provided on a side of the second annular liquid storage box (49) close to the electrically-controlled movable frame (13).

6. A system for spraying an anti-corrosion coating on the surface of a steel pipe according to claim 5, characterized in that: The internal spraying assembly further comprises a limiting sliding frame (45) slidably connected to the outer wall of the limiting rod (42); the lower end of the limiting sliding frame (45) is slidably connected to the inside of the slide groove of the second annular liquid storage box (49); the upper end of the limiting sliding frame (45) is fixedly connected to a strong magnetic plate; the top of the inner wall of the spraying chamber (12) is fixedly connected to an electromagnetic suction cup frame (44); and the lower side of the electromagnetic suction cup frame (44) is fixedly connected to an electromagnetic suction cup.

7. A system for spraying an anti-corrosion coating on the surface of a steel pipe according to claim 6, characterized in that: The internal spraying assembly further comprises a drainage tube (47) symmetrically fixedly connected to the outer wall of the first annular liquid storage box (46) with the first annular liquid storage box (46) as the center; the first annular liquid storage box (46) is rotatably connected to the second annular liquid storage box (49) on one side close to the electric-controlled movable frame (13); the drainage tube (47) is fixedly connected to a strip-shaped spraying plate (48) at one end away from the first annular liquid storage box (46); the drainage tube (47) is connected to the feed pipe (43) through the first annular liquid storage box (46); one end of the feed pipe (43) located inside the electric-controlled movable frame (13) is fixedly connected to a booster spray pump; the electromagnetic suction cup frame (44) is electrically connected to the internal power supply of the spraying chamber (12); and a sealing ring is provided at the rotational connection between the first annular liquid storage box (46) and the second annular liquid storage box (49).

8. The system for spraying an anti-corrosion coating on the surface of a steel pipe according to claim 3, characterized in that: The outer wall of the circular plate (37) is tightly fitted to the inner wall of the airtight hollow cylinder (33); the outer wall of the second hollow air pipe (38) is tightly fitted to the inner wall of the first hollow air pipe (32); the nozzle (31) is made of high-temperature resistant rubber material; a power source is provided inside the base (11); a booster pump is provided inside the spray chamber (12); and the power source is electrically connected to the booster pump.

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