Automatic spraying device for anticorrosion coating of inner wall of pressure vessel

Abstract

The utility model discloses a kind of automatic spraying devices of anticorrosive coating of pressure vessel inner wall, is related to the field of automatic spraying equipment, a kind of automatic spraying devices of anticorrosive coating of pressure vessel inner wall, including base and pressure vessel tank, pressure vessel tank is placed in base top, base front end is provided with moving plate, moving plate top is connected with collection box, spraying machine is installed in moving plate front part, moving frame end portion is contacted with pressure vessel tank inner wall, rotating spray head is installed in moving frame rear end, conveying pipe is connected in moving frame front end, conveying pipe other end is connected with the discharge port of spraying machine, controller is installed on spraying machine, pulling component for stabilizing moving conveying pipe is set on moving plate. By the driving roller of pulling component and motor cooperation, conveying pipe is realized smooth sliding under the rotation of driving roller, reduces artificial operation difficulty, to solve the problem of moving speed fluctuation, ensure that coating deposition amount is uniform in spraying process.

Description

Technical Field

[0001] This utility model relates to the field of automated spraying equipment, specifically to an automatic spraying device for anti-corrosion coating on the inner wall of a pressure vessel. Background Technology

[0002] Pressure vessels are core equipment in industries such as petroleum, chemical, energy, and pharmaceuticals, and the corrosion resistance of their internal walls directly affects their service life and production safety. Large pressure vessels typically use high-performance anti-corrosion coatings such as epoxy resin, polyurethane, and glass flakes to construct a protective layer on their inner walls. These coatings need to form a uniform and dense layer within a confined space to resist media corrosion, high temperature and pressure, and chemical attack. However, internal wall spraying operations remain a technical challenge in the industry due to space constraints and operational complexity, necessitating efficient and precise automated solutions.

[0003] Existing spraying equipment has achieved a high level of automation in external surface treatment, but internal wall spraying still relies on semi-mechanized operations. The current mainstream solution uses a movable support frame with a rotating spray head: the support frame is equipped with casters to adapt to the curved surface of the container's inner wall, the spray head rotates 360° for spraying, and the material tube is manually pulled horizontally by the operator. While this structure can complete basic spraying, it requires manual, continuous pulling of a several-meter-long material tube for synchronous movement. The operating space is narrow, and the labor intensity is high. In actual operation, experienced technicians need to control the movement speed through visual judgment and manual feel.

[0004] Because it is difficult to maintain a constant speed when manually pulling the material tube, the moving speed of the material tube is prone to fluctuation, which directly leads to differences in the amount of paint deposited per unit area, resulting in coating thickness deviation. Uniform spraying requires a high level of skill from the workers. Utility Model Content

[0005] The purpose of this invention is to provide an automatic spraying device for anti-corrosion coating on the inner wall of pressure vessels that can overcome the drawback of high manual requirements.

[0006] To achieve the above-mentioned technical effects, this utility model is implemented through the following technical solution: an automatic spraying device for anti-corrosion coating on the inner wall of a pressure vessel, comprising a base and a pressure vessel tank, wherein the pressure vessel tank is placed on the top of the base, a movable plate is provided at the front end of the base, a collection box is connected to the top of the movable plate, a spraying machine is installed at the front of the movable plate, the end of the movable frame contacts the inner wall of the pressure vessel tank, a rotating nozzle is installed at the rear end of the movable frame, a conveying pipe is connected to the front end of the movable frame, the other end of the conveying pipe is connected to the outlet of the spraying machine, a controller is installed on the spraying machine, and a material pulling assembly for stabilizing the moving conveying pipe is provided on the movable plate.

[0007] Furthermore, the material pulling assembly includes a guide rod, a mounting frame is connected to the rear of the moving plate, a motor is mounted on the side of the mounting frame, the motor is wired to the controller, two drive rollers are rotatably connected inside the mounting frame, the two drive rollers are in transmission cooperation with the conveying pipe, the shaft of the lower drive roller is connected to the output shaft of the motor, and the two ends of the shaft of the upper drive roller are connected to connecting plates, the two connecting plates are slidably connected to the upper left and right wall panels of the mounting frame, the guide rod passes through the connecting plate and is connected to the mounting frame, and a return spring is sleeved on the guide rod, the return spring is located on the upper and lower sides of the connecting plate, one end of the return spring is connected to the mounting frame, and the other end is connected to the connecting plate.

[0008] Furthermore, a plug rod is connected to the rear side of the movable frame, and a plug hole is opened at the lower part of the mounting frame. The plug rod is slidably connected to the mounting frame through the plug hole. Two correction blocks are connected to the rear side of the mounting frame, and the correction blocks are located on the left and right sides of the plug hole.

[0009] Furthermore, the outer ring of the drive roller is fitted with a rubber ring.

[0010] Furthermore, each of the top edges of the collection box is connected to a protective pad, which is pressed together with the conveying pipe.

[0011] Furthermore, the bottom of the movable plate is equipped with several casters.

[0012] Furthermore, the mounting bracket is connected to cover plates on both the left and right sides, and the cover plates are used to close the space for the connecting plate to slide.

[0013] Compared with the prior art, the present invention has the following advantages: 1. By cooperating with the motor through the drive roller of the material pulling assembly, the conveying pipe can slide smoothly under the rotation of the drive roller, reducing the difficulty of manual operation, thereby solving the problem of movement speed fluctuation and ensuring uniform coating deposition during the spraying process.

[0014] 2. Through the synergistic action of the reset spring and the guide rod, the upper drive roller applies a continuous and stable downward pressure to the conveying pipe. Combined with the elastic deformation of the protective pad, this ensures that the conveying pipe and the drive roller are tightly fitted without slippage, reducing transmission vibration and improving the stability of the spraying process.

[0015] 3. The inclined design of the correction block, combined with the lubricating coating of the insertion hole, enables the insertion rod to automatically correct its direction and be smoothly inserted when it deviates. This provides auxiliary support for the moving frame, prevents uneven coating on the port edge after it detaches from the pressure vessel, and improves the operational error tolerance. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 This is a cross-sectional view of the installation structure of the rotating nozzle and the movable frame of this utility model.

[0019] Figure 3 This is a cross-sectional view of the installation structure of the motor and drive roller of this utility model.

[0020] Figure 4 This is a schematic diagram of the installation structure of the correction block and mounting bracket of this utility model.

[0021] The markings in the diagram are as follows: 1-base, 2-pressure vessel, 3-moving plate, 301-collecting box, 4-sprayer, 401-conveying pipe, 402-moving frame, 403-rotating nozzle, 5-controller, 6-mounting bracket, 7-drive roller, 8-motor, 9-pressure roller, 10-connecting plate, 11-reset spring, 12-guide rod, 13-insertion hole, 14-correction block, 15-insertion rod, 16-rubber ring, 17-protective pad, 18-caster wheel, 19-cover plate. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] Example: An automatic spraying device for anti-corrosion coating on the inner wall of a pressure vessel, see reference. Figures 1 to 4As shown, the system includes a base 1, a pressure vessel tank 2, a moving plate 3, a collection box 301, a sprayer 4, a conveying pipe 401, a moving frame 402, a rotary nozzle 403, a controller 5, and a material pulling assembly. The pressure vessel tank 2 is placed on top of the base 1. The moving plate 3 is located at the front end of the base 1. The collection box 301 is connected to the top of the moving plate 3. The sprayer 4 is installed at the front of the moving plate 3. The end of the moving frame 402 contacts the inner wall of the pressure vessel tank 2. The end of the moving frame 402 is equipped with guide wheels, which can roll along the curved surface of the inner wall of the container during movement to reduce frictional resistance. The rotary nozzle 403 is installed at the rear end of the moving frame 402. The conveying pipe 401 is connected to the front end of the moving frame 402. The other end of the conveying pipe 401 is connected to the outlet of the sprayer 4. The controller 5 is installed on the sprayer 4. The material pulling assembly for stabilizing the movement of the conveying pipe 401 is provided on the moving plate 3.

[0024] See Figure 2 and Figure 3 As shown, the material pulling assembly includes a mounting frame 6, a drive roller 7, a motor 8, a pressure roller 9, a connecting plate 10, a return spring 11, and a guide rod 12. The mounting frame 6 is connected to the rear of the moving plate 3. The motor 8 is mounted on the side of the mounting frame 6 and is wired to the controller 5. Two drive rollers 7 are rotatably connected inside the mounting frame 6. The two drive rollers 7 are in transmission cooperation with the conveying pipe 401. The rotating shaft of the lower drive roller 7 is connected to the output shaft of the motor 8. The two ends of the rotating shaft of the upper drive roller 7 are connected to the connecting plates 10. The two connecting plates 10 are slidably connected to the upper left and right wall panels of the mounting frame 6, respectively. The guide rod 12 passes through the connecting plate 10 and is connected to the mounting frame 6. The guide rod 12 is fitted with a return spring 11. The return spring 11 is located on the upper and lower sides of the connecting plate 10. One end of the return spring 11 is connected to the mounting frame 6, and the other end is connected to the connecting plate 10. The initial lengths of the upper and lower return springs 11 are different. After cooperation, they can provide continuous and stable downward pressure, so that the upper drive roller 7 and the conveying pipe 401 fit more tightly and reduce transmission vibration.

[0025] See Figure 2 and Figure 4 As shown, it also includes a correction block 14 and a plug rod 15. The plug rod 15 is connected to the rear side of the movable frame 402. The mounting frame 6 has a plug hole 13 at the bottom. The plug rod 15 is slidably connected to the mounting frame 6 through the plug hole 13. Two correction blocks 14 are connected to the rear side of the mounting frame 6. The correction blocks 14 are located on the left and right sides of the plug hole 13. The inner side of the correction block 14 is designed with a 45-degree slope, which can guide the plug rod 15 to automatically correct its direction when it deviates.

[0026] See Figure 3 As shown, it also includes a rubber ring 16. The outer ring of the drive roller 7 is fitted with a rubber ring 16. The surface of the rubber ring 16 has a textured surface, which can increase the coefficient of friction with the conveying pipe 401.

[0027] See Figure 2As shown, it also includes a protective pad 17. The top edge of the collection box 301 is connected to the protective pad 17. The protective pad 17 is squeezed and fitted with the conveying pipe 401. The surface of the protective pad 17 has a honeycomb buffer structure, which can disperse the pressure of the conveying pipe 401.

[0028] See Figure 2 As shown, it also includes casters 18. Several casters 18 are installed at the bottom of the movable plate 3. The casters 18 have a self-locking function.

[0029] See Figure 2 As shown, it also includes a cover plate 19. The cover plate 19 is connected to the left and right sides of the mounting bracket 6. The cover plate 19 is used to close the space for the sliding of the connecting plate 10, which can prevent dust from entering the sliding area, reduce the impact of impurities on the reset spring 11, and extend the service life of the equipment.

[0030] After the staff places the pressure vessel tank 2, which needs to be sprayed with anti-corrosion coating, steadily onto the designated position of the base 1, they hold the handles on both sides of the moving frame 402 with both hands and slowly push the moving frame 402 horizontally along the axis of the pressure vessel tank 2 until the rotating nozzle 403 at the end of the moving frame 402 reaches the inner wall of the other end of the pressure vessel tank 2. At this time, the moving frame 402 maintains appropriate contact with the inner wall of the pressure vessel tank 2, preparing for the subsequent spraying operation.

[0031] The staff sets the paint pump flow range of the sprayer 4 through the controller 5 panel, and adjusts the speed of the motor 8 according to the inner wall size of the pressure vessel tank 2 and the spraying requirements to ensure that the rotation of the drive roller 7 matches the moving speed of the conveying pipe 401, providing a stable parameter basis for the spraying process.

[0032] After the motor 8 starts, it drives the lower drive roller 7 to rotate. The connecting plate 10 slides along the wall of the mounting frame 6 under the constraint of the guide rod 12. At this time, the return spring 11 at the bottom of the connecting plate 10 is stretched and the return spring 11 at the top is compressed. Together, they make the upper drive roller 7 apply continuous downward pressure to the conveying pipe 401. With the elastic deformation of the protective pad 17, it ensures that the conveying pipe 401 is tightly attached to the two drive rollers 7 without slippage, so that the conveying pipe 401 slides smoothly under the drive roller 7.

[0033] The guide rod 12 achieves precise sliding through the guide hole of the connecting plate 10, effectively suppressing the swaying and shaking of the connecting plate 10 during the sliding process, so that the upper drive roller 7 always remains parallel to the lower drive roller 7 and the distance is constant, ensuring that the part of the conveying pipe 401 connected to the moving frame 402 after passing through the mounting frame 6 remains straight, avoiding the impact of bending deformation on the spraying effect.

[0034] Under the continuous pulling of the drive roller 7, the moving frame 402 moves in a straight line at a uniform speed along the inner wall of the pressure vessel tank 2. During the movement, the rotating nozzle 403 continuously sprays atomized anti-corrosion coating. The coating particles are uniformly deposited on the inner wall of the pressure vessel tank 2 to form a protective coating. The rotation speed of the rotating nozzle 403 is related to the spraying effect and needs to be kept within a reasonable range. More importantly, it is necessary to control the coordination and matching between the moving speed of the moving frame 402 and the coating pump flow rate of the sprayer 4.

[0035] When the moving frame 402 moves to the vicinity of the port of the pressure vessel tank 2, the insertion rod 15 connected to the rear side of the moving frame 402 aligns with the insertion hole 13 at the bottom of the mounting frame 6. Under the guidance of the correction blocks 14 on both sides, the insertion rod 15 is smoothly inserted into the insertion hole 13. Even if the insertion rod 15 has a slight offset angle, it can be guided to the correct insertion position through the inclined structure of the correction block 14. At this time, the insertion rod 15 plays an auxiliary support role for the moving frame 402, preventing uneven spraying at the port edge due to insufficient support after the moving frame 402 is separated from the pressure vessel tank 2.

[0036] After the inner wall of the pressure vessel tank 2 is sprayed, the workers turn off the spraying machine 4 and the motor 8 in sequence. The conveying pipe 401 hangs down naturally under the action of gravity. The part of the conveying pipe 401 pulled by the drive roller 7 slides down along the mounting frame 6 into the collection box 301. The protective pad 17 on the top edge of the collection box 301 has an elastic buffering effect to prevent the conveying pipe 401 from contacting the edge of the collection box 301 and causing scratches, thus ensuring that the surface quality of the conveying pipe 401 is not damaged.

[0037] After the staff unlocks the brake device of the universal wheel 18 at the bottom of the moving plate 3, they push the moving plate 3 with both hands to move it along the guide rail of the base 1 to the position of the next pressure vessel tank 2 to be sprayed. After the new pressure vessel tank 2 is moved to the designated position of the base 1, the motor 8 is started to reverse so that the drive roller 7 rotates in the opposite direction, so that the conveying pipe 401 is pulled out from the collection box 301. At the same time, the staff inserts the end of the conveying pipe 401 into the new pressure vessel tank 2, and at the same time, the insertion rod 15 is disengaged from the insertion hole 13. After the equipment status is switched, the inner wall spraying operation of the new pressure vessel tank 2 can begin.

[0038] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. An automatic spraying device for anti-corrosion coating on the inner wall of a pressure vessel, characterized in that: The device includes a base (1) and a pressure vessel tank (2). The pressure vessel tank (2) is placed on the top of the base (1). A movable plate (3) is provided at the front end of the base (1). A collection box (301) is connected to the top of the movable plate (3). A sprayer (4) is installed at the front of the movable plate (3). The end of the movable frame (402) contacts the inner wall of the pressure vessel tank (2). A rotating nozzle (403) is installed at the rear end of the movable frame (402). A conveying pipe (401) is connected to the front end of the movable frame (402). The other end of the conveying pipe (401) is connected to the outlet of the sprayer (4). A controller (5) is installed on the sprayer (4). A material pulling assembly for stabilizing the moving conveying pipe (401) is provided on the movable plate (3).

2. The automatic spraying device for anti-corrosion coating on the inner wall of a pressure vessel as described in claim 1, characterized in that: The material pulling assembly includes a guide rod (12), a mounting frame (6) is connected to the rear of the moving plate (3), a motor (8) is installed on the side of the mounting frame (6), the motor (8) is wired to the controller (5), two drive rollers (7) are rotatably connected inside the mounting frame (6), the two drive rollers (7) are driven by the conveying pipe (401), the shaft of the lower drive roller (7) is connected to the output shaft of the motor (8), and the two ends of the shaft of the upper drive roller (7) are connected to connecting plates (10). The two connecting plates (10) are slidably connected to the upper left and right walls of the mounting frame (6), the guide rod (12) passes through the connecting plate (10) and is connected to the mounting frame (6), the guide rod (12) is sleeved with a return spring (11), the return spring (11) is located on the upper and lower sides of the connecting plate (10), one end of the return spring (11) is connected to the mounting frame (6), and the other end is connected to the connecting plate (10).

3. The automatic spraying device for anti-corrosion coating on the inner wall of a pressure vessel as described in claim 2, characterized in that: The movable frame (402) is connected to the rear side of the insert rod (15), and the mounting frame (6) has an insertion hole (13) at the bottom. The insert rod (15) is slidably connected to the mounting frame (6) through the insertion hole (13). Two correction blocks (14) are connected to the rear side of the mounting frame (6). The correction blocks (14) are located on the left and right sides of the insertion hole (13).

4. The automatic spraying device for anti-corrosion coating on the inner wall of a pressure vessel as described in claim 3, characterized in that: The drive roller (7) is fitted with a rubber ring (16) on its outer ring.

5. The automatic spraying device for anti-corrosion coating on the inner wall of a pressure vessel as described in claim 4, characterized in that: The top edge of each collection box (301) is connected to a protective pad (17), which is pressed together with the conveying pipe (401).

6. The automatic spraying device for anti-corrosion coating on the inner wall of a pressure vessel as described in claim 5, characterized in that: The bottom of the movable plate (3) is equipped with several casters (18).

7. An automatic spraying device for anti-corrosion coating on the inner wall of a pressure vessel as described in claim 6, characterized in that: The mounting bracket (6) is connected to cover plates (19) on the left and right sides. The cover plates (19) are used to close the space for the connecting plate (10) to slide.

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