A device for spraying anticorrosive paint on the surface of a pool support column

Abstract

The present application belongs to the field of building wall coating spraying technology, and particularly relates to a pool inner support column surface anticorrosive coating spraying device, which comprises a support column and a spraying mechanism arranged on the surface of the support column and moving along the length direction of the support column. The spraying mechanism comprises support units arranged at intervals on the outer side of the support column, and a walking unit and a spraying unit mounted on the support units. The support units comprise two first telescopic supports arranged symmetrically about the support column, and two second telescopic supports arranged symmetrically about the support column in another direction. The walking unit comprises a plurality of guide wheels mounted on the first telescopic supports and the second telescopic supports. The two first telescopic supports are each provided with a driving motor for driving the guide wheels to rotate. The spraying unit comprises a plurality of nozzles fixed on the first telescopic supports. The technical scheme of the present application can effectively solve the problem that the height of the existing spraying device is limited when the spraying device sprays the surface of the support column.

Description

Technical Field

[0001] This invention belongs to the field of building wall coating spraying technology, specifically relating to a device for spraying anti-corrosion coating on the surface of pillars inside a water tank. Background Technology

[0002] The main structures of a water supply plant include water tanks, pools, and fire hydrant pools. Wastewater treatment pools, in particular, require anti-corrosion coatings to be applied to the water surface after construction to form a protective film. This film isolates the pool from corrosive liquids and ensures the pool's airtightness. Currently, the anti-corrosion coating is applied by hand using a spray bottle, which is time-consuming, labor-intensive, and lacks precise control over the uniformity of the coating. Furthermore, when spraying higher pool surfaces, workers need scaffolding or other climbing tools, increasing their workload and safety risks.

[0003] To address the aforementioned issues, for example, a Chinese patent discloses a building anti-corrosion coating spraying device (patent publication number: CN113202271A), comprising a base plate, with a coating storage tank, a first motor, a second motor, and fixed columns fixedly connected to the upper end of the base plate. Two fixed columns are provided and located on the left and right sides of the front end of the base plate. A telescopic hose is connected to the front end of the coating storage tank, and the other end of the telescopic hose is connected to a spraying plate. Multiple spraying holes are evenly distributed on the front surface of the spraying plate. A first adjustment mechanism for adjusting the spraying height is fixedly connected to the output shaft of the first motor, and a second adjustment mechanism for adjusting the spraying angle is fixedly connected to the output shaft of the second motor. This device can maintain a relatively precise distance between the spraying plate and the wall during the spraying process, and can also conveniently spray the higher parts of the wall.

[0004] While the above-mentioned technical solutions can effectively solve the problems of unsafety and low efficiency of manual spraying, the sewage treatment tanks of large water plants are usually constructed with concrete structures, and support columns need to be built inside the sewage treatment tanks. A capping beam is built on top of the support columns to seal the tanks and ensure the airtightness and structural stability of the sewage treatment tanks. Although the above-mentioned technical solutions can spray the surface inside the sewage treatment tanks, the spraying height is limited when spraying anti-corrosion coatings on the surface of the support columns. The base plate needs to be moved multiple times during the spraying process, which is time-consuming and labor-intensive. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a device for spraying anti-corrosion coating on the surface of support columns in a water tank, so as to solve the problem of limited height when the existing spraying device sprays the surface of the support column.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A device for spraying anti-corrosion coating on the surface of a support column in a water tank includes a support column and a spraying mechanism disposed on the surface of the support column and moving along its length. The spraying mechanism includes a support unit spaced apart on the outside of the support column and a traveling unit and a spraying unit mounted on the support unit. The support unit includes two first telescopic brackets symmetrically arranged about the support column, and two second telescopic brackets symmetrically arranged about the support column in another direction. The two first telescopic brackets and the two second telescopic brackets together form a rectangular structure. One end of each of the two first telescopic brackets is hinged to one of the second telescopic brackets, and the other end of each of the two first telescopic brackets is detachably connected to the other second telescopic bracket. Both the first and second telescopic brackets can extend and retract along their length in the horizontal plane, and both the first and second telescopic brackets are connected to a horizontally arranged hydraulic telescopic cylinder for adjusting the amount of extension and retraction. The walking unit includes multiple guide wheels mounted on the first telescopic bracket and the second telescopic bracket; the multiple guide wheels are spaced apart around the support column in a circumferential direction; and each of the two first telescopic brackets is equipped with a drive motor for driving the guide wheels to rotate. The spraying unit includes multiple spray heads fixed on a first telescopic bracket. The multiple spray heads are connected to an air pump located outside the spraying mechanism. The input end of the air pump is connected to a paint storage tank.

[0007] Furthermore, each of the two first telescopic brackets is equipped with a cleaning unit for cleaning the surface of the support column. The cleaning unit includes two first telescopic rods and a second telescopic rod arranged vertically at intervals. The peripheral surfaces of the first telescopic rods and the second telescopic rods are connected to bristles that abut against the surface of the support column, and the bristles of the first telescopic rods and the second telescopic rods cover one side surface of the support column. Each first telescopic bracket is provided with two cleaning units, and the two cleaning units are arranged symmetrically about the first telescopic bracket.

[0008] Furthermore, the cleaning unit also includes movable blocks disposed at both ends of the first telescopic rod and the second telescopic rod; the first telescopic rod and the second telescopic rod are rotatably connected to the movable blocks; a fixed block is elastically slidably disposed at one end of each movable block near the first telescopic bracket, and the fixed block is fixedly connected to the first telescopic bracket.

[0009] Furthermore, each of the movable blocks has two worm gears on the side of its surface away from the cleaning unit, which are coaxial with and powered by the first and second telescopic rods. The two worm gears mesh with a horizontally arranged worm. The worm is rotatably connected to the movable block, and a transmission wheel is fixedly connected to one end of the worm gear. When the spraying mechanism moves along the length of the support column, the transmission wheel contacts the surface of the support column and drives the first and second telescopic rods to rotate synchronously through the worm gear.

[0010] Furthermore, each of the two first telescopic brackets is connected to a vertically positioned protective cover that can extend and retract along its length; a movable plate is rotatably connected to the side surface of the protective cover near the support column, and the spray nozzles are all mounted on the surface of the movable plate; a reciprocating swing assembly is provided between the movable plate and the protective cover; a transmission component is connected between the reciprocating swing assembly and the adjacent first telescopic rod, and when the spraying mechanism moves along the length of the support column, the first telescopic rod simultaneously drives the reciprocating swing assembly to move, causing the spray nozzles on the movable plate to swing up and down reciprocally.

[0011] Furthermore, multiple adjustable bolts are connected between the protective cover and the first telescopic bracket; the peripheral surface of each adjustable bolt is rotatably connected to the first telescopic bracket, and one end of the adjustable bolt is rotatably connected to the protective cover, thereby adjusting the distance between the support cover and the support column.

[0012] The beneficial effects of this invention are as follows: 1. This invention, through the cooperation of the support unit, the spraying unit, and the walking unit, enables the spraying mechanism to automatically spray anti-corrosion coatings onto the surface of support columns of different heights, thereby improving the construction efficiency of workers. Furthermore, the support unit can adjust its size within a certain range, making it suitable for spraying support columns of different sizes within a certain range, thus expanding the applicability of this invention. 2. Through the cooperation of components such as the cleaning unit, worm gear, and transmission wheel, the surface of the support column can be cleaned, removing dust and other debris, effectively improving the adhesion and durability of the paint; and through the cooperation of the transmission belt and reciprocating oscillating component, the nozzle can be made to oscillate up and down, simulating the movement trajectory of the worker spraying, which can improve the uniformity and thickness of the paint and ensure the quality of the paint.

[0013] Other advantages, objectives, and features of the invention will be set forth in the following description and will be apparent to those skilled in the art in some respects, or may be learned by practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0014] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration: Figure 1 This is a schematic diagram of the spraying mechanism and support column installation of the present invention; Figure 2 This is a top view of the spraying mechanism of the present invention; Figure 3 This is a schematic diagram of the spraying mechanism of the present invention when it is open; Figure 4 for Figure 1 Enlarged view of point A in the middle; Figure 5 for Figure 3 Cross-sectional view of the protective cover at the middle BB section; Figure 6 for Figure 3 Enlarged view of point C in the middle; Figure 7 This is a schematic diagram of the cleaning unit structure of the present invention; Figure 8 for Figure 7 Sectional view at point DD.

[0015] The following labels are used in the attached diagram: 1 Support column, 2 Spraying mechanism, 3 Support unit, 301 First telescopic bracket, 302 Second telescopic bracket, 4 Hydraulic telescopic cylinder, 5 Walking unit, 501 Guide wheel, 502 Drive motor, 6 Spray head, 7 Cleaning unit, 701 First telescopic rod, 702 Second telescopic rod, 703 Movable block, 704 Fixed block, 8 Worm gear, 9 Worm, 10 Transmission wheel, 11 Housing, 12 Electromagnet, 13 Protective cover, 14 Movable plate, 15 Rotating disk, 16 Fixed column, 17 Linkage block, 18 Transmission belt, 19 Adjustable bolt. Detailed Implementation

[0016] like Figures 1-8 As shown, A device for spraying anti-corrosion coating on the surface of a support column in a water tank includes a rectangular support column 1 and a spraying mechanism 2 disposed on the surface of the support column 1 and moving along its length. The spraying mechanism 2 includes a support unit 3 spaced apart on the outside of the support column 1, a walking unit 5 mounted on the support unit 3, and a spraying unit. The support unit 3 includes two first telescopic brackets 301 symmetrically arranged about the support column 1, and two second telescopic brackets 302 symmetrically arranged about the support column 1 in another direction. The two first telescopic brackets 301 and the two second telescopic brackets 302 together form a rectangular structure. The first telescopic bracket 301 is composed of two mutually sliding "I"-shaped support frames, and the second telescopic bracket 302 is also composed of two similar "I"-shaped support frames that slide against each other. One end of each of the two first telescopic brackets 301 is hinged to one of the second telescopic brackets 302. The other end of the first telescopic bracket 301 is detachably connected to the other second telescopic bracket 302 by bolts and nuts; both the first telescopic bracket 301 and the second telescopic bracket 302 can extend and retract along their length in the horizontal plane, and each of the second telescopic brackets 302 is fixedly connected to a horizontally arranged hydraulic telescopic cylinder 4 by bolts, and the hydraulic telescopic cylinder 4 drives the two support frames to slide relative to each other and adjust their relative positions; a hydraulic telescopic cylinder 4 for adjusting the amount of extension and retraction is also provided between the two support frames on one of the first telescopic brackets 301 (obscured in the figure and not shown). The walking unit 5 includes multiple fixed frames mounted on the first telescopic bracket 301 and the second telescopic bracket 302, and guide wheels 501 rotatably connected to the fixed frames; the fixed frames are rotatably connected to the first telescopic bracket 301 and the second telescopic bracket 302, and the multiple guide wheels 501 are spaced apart around the support column 1; each of the fixed frames on the two first telescopic brackets 301 is equipped with a drive motor 502 for driving the guide wheels 501 to rotate, and the drive motor 502 is fixedly connected to the fixed frame by bolts; The spraying unit includes multiple nozzles 6 fixed on two first telescopic brackets 301, and the paint sprayed by the multiple nozzles 6 on each first telescopic bracket 301 just covers one side surface of the adjacent support column 1. The multiple nozzles 6 are connected to an air pump located outside the spraying mechanism 2 through connecting pipes. The input end of the air pump is connected to a paint storage box (the air pump and paint storage box are not shown in the figure).

[0017] Combination Figure 1 As shown, when spraying paint onto the surface of the support column 1, the spraying mechanism 2 is moved to a position close to the support column 1, and then one of the first telescopic brackets 301 is rotated and opened. At this time, the shape of the spraying mechanism 2 is as shown. Figure 3 As shown, adjust the lengths of the first telescopic bracket 301 and the second telescopic bracket 302 according to the size of the support column 1. After adjustment, move the spraying mechanism 2 to a position close to the surface of the support column 1, and then reset the previously opened first telescopic bracket 301 so that the spraying mechanism 2 forms a rectangle around the support column 1. At this time, the positional relationship between the spraying mechanism 2 and the support column 1 is as follows. Figure 2As shown, the hydraulic telescopic cylinders 4 on the first telescopic bracket 301 and the two hydraulic telescopic cylinders 4 on the second telescopic bracket 302 are activated sequentially. At this time, the surfaces of all guide wheels 501 are in contact with the surface of the support column 1. The multiple guide wheels 501 work together to set the spraying mechanism 2 on the peripheral surface of the support column 1 at intervals. By retracting the two hydraulic telescopic cylinders 4 on the two second telescopic brackets 302 and applying pressure to the first telescopic brackets 301 on both sides, the guide wheels 501 on the first telescopic brackets 301 can obtain sufficient pressure to abut against the surface of the support column 1, increasing the friction between the guide wheels 501 and the surface of the support column 1. The drive motor 502 is started to move the spraying mechanism 2 to the top of the support column 1, and then the control is activated. The drive motor 502 drives the spraying mechanism 2 to move downward at a constant speed along the support column 1. At the same time, the air pump is started, and the air pump delivers the anti-corrosion coating in the coating storage tank to the nozzle 6 and sprays it on both sides of the support column 1 until the spraying mechanism 2 moves to the bottom of the support column 1 and stops spraying. Then, the hydraulic telescopic cylinder 4 is controlled to extend, so that the first telescopic bracket 301 and the second telescopic bracket 302 are unfolded. The first telescopic bracket 301 is rotated and opened, and the spraying mechanism 2 is moved out of the outer surface of the support column 1. Then the spraying mechanism 2 is rotated and moved again to be close to the outer surface of the support column 1. At this time, the two first telescopic brackets 301 are aligned with the two sides of the support column 1 that have not been sprayed with coating. Then the above process is repeated to complete the spraying of the four sides of the support column 1. By cooperating with the first telescopic bracket 301, the second telescopic bracket 302, and the hydraulic telescopic cylinder 4, the size of the spraying mechanism 2 can be adjusted, and it can spray support columns 1 of different sizes within a certain range, effectively improving the applicability of the invention. While the spraying mechanism 2 moves up and down along the length of the support column 1 driven by the drive motor 502, the air pump transports the anti-corrosion coating in the paint storage tank to the nozzle 6 and sprays it onto the surface of the support column 1, realizing automatic coating. This solves the problem that it is inconvenient for workers to spray the surface of higher support columns 1, greatly reducing the burden on workers, effectively improving construction efficiency and reducing construction costs. The air pump and paint storage tank are placed on the ground, and the air pump and nozzle 6 are connected by a connecting pipe. Theoretically, by extending the connecting pipe, the spraying mechanism 2 can spray support columns 1 of different heights, effectively solving the problem of height limitation when spraying support columns 1 in existing spraying equipment.

[0018] In this embodiment, each of the two first telescopic brackets 301 is equipped with a cleaning unit 7 for cleaning the surface of the support column 1. The cleaning unit 7 includes two first telescopic rods 701 and second telescopic rods 702 arranged vertically and horizontally. The peripheral surfaces of the first telescopic rods 701 and second telescopic rods 702 are connected with bristles that abut against the surface of the support column 1, and the bristles of the first telescopic rods 701 and second telescopic rods 702 cooperate with each other and just cover one side of the surface of the support column 1. Each first telescopic bracket 301 is provided with two cleaning units 7, and the two cleaning units 7 are arranged symmetrically about the first telescopic bracket 301, and the two cleaning units 7 are respectively located on both sides of the nozzle 6.

[0019] As shown in the figure, the larger peripheral surfaces of the first telescopic rod 701 and the second telescopic rod 702 are connected with bristles. The first telescopic rod 701 and the second telescopic rod 702 are staggered so that the bristles on their surfaces can cover one side of the support column 1. When the spraying mechanism 2 moves up and down along the length of the support column 1 under the drive of the drive motor 502, the bristles on the surfaces of the first telescopic rod 701 and the second telescopic rod 702 can clean the dust and other debris on the surface of the support column 1, improve the cleanliness of the support column 1 surface, and ultimately improve the adhesion of the paint sprayed on the surface of the support column 1, as well as improve the durability of the coating.

[0020] In this embodiment, the cleaning unit 7 further includes movable blocks 703 disposed at both ends of the first telescopic rod 701 and the second telescopic rod 702; the first telescopic rod 701 and the second telescopic rod 702 are rotatably connected to the movable blocks 703; a fixed block 704 (a spring is provided between the fixed block 704 and the movable block 703) is elastically slidably disposed at one end of the movable block 703 near the first telescopic bracket 301, and the fixed block 704 is fixedly connected to the surface of the first telescopic bracket 301 by bolts and nuts.

[0021] Combination Figure 3 and Figure 7 As shown, when the guide wheels 501 are in contact with the surface of the support column 1, the spring in the movable block 703 can apply a certain pressure to the fixed block 704, so that the movable block 703 can drive the bristles on the first telescopic rod 701 and the second telescopic rod 702 to stick tightly to the surface of the support column 1, improve the cleaning effect of the bristles on the surface of the support column 1, and also effectively clean the uneven areas on the surface of the support column 1.

[0022] In this embodiment, each movable block 703 has two worm gears 8 on its surface away from the cleaning unit 7, which are coaxial with and powered by the first telescopic rod 701 and the second telescopic rod 702. A horizontally arranged worm 9 meshes between the two worm gears 8. The worm 9 is rotatably connected to the movable block 703, and a transmission wheel 10 is fixedly connected to one end of the worm gear 8 near the support column 1. When the spraying mechanism 2 moves along the length of the support column 1, the transmission wheel 10 contacts the surface of the support column 1 and drives the first telescopic rod 701 and the second telescopic rod 702 to rotate synchronously through the worm gears 8 and worm 9. A housing 11 for protecting the worm gears 8 and worm 9 is fixedly connected to one side of the movable block 703 by bolts.

[0023] Combination Figure 1 and Figure 7 As shown, when the spraying mechanism 2 moves up and down along the length of the support column 1 under the action of the drive motor 502, the surface of the transmission wheel 10 also contacts the surface of the support column 1, causing the transmission wheel 10 to rotate. At the same time, the transmission wheel 10 rotates, driving the first telescopic rod 701 and the second telescopic rod 702 to rotate synchronously through the worm gear 8 and worm 9. This can further improve the cleaning effect of the brush bristles on the surface of the first telescopic rod 701 and the second telescopic rod 702 on the surface of the support column 1, thereby effectively improving the adhesion and durability of the paint after spraying.

[0024] In the cleaning unit 7 located above the nozzle 6, an electromagnet 12 is provided on the surface of the fixed block 704 near the movable block 703. When the electromagnet 12 is energized, it attracts the movable block 703 (in conjunction with...). Figure 8 As shown), at this time, the spring is compressed, and the cleaning unit 7 located above the nozzle 6 moves a distance away from the support column 1, so that the bristles on the cleaning unit 7 no longer contact the surface of the support column 1. This is to prevent the cleaning unit 7 located above the nozzle 6 from brushing away the paint when the spraying mechanism 2 moves down along the top of the support column 1 and sprays paint.

[0025] In this embodiment, each of the two first telescopic brackets 301 is connected to a vertically positioned protective cover 13 that can extend and retract along its length. A movable plate 14 is provided on the side surface of the protective cover 13 near the support column 1, and the nozzles 6 are all mounted on the side surface of the movable plate 14 near the support column 1. A reciprocating swing assembly is provided between the movable plate 14 and the protective cover 13. The reciprocating swing assembly includes a rotating disk 15 and a fixed column 16 vertically welded to the surface of the rotating disk 15. A linkage block 17 is vertically fixedly connected to the side surface of the movable plate 14 near the protective cover 13, and the linkage block 17 is rotatably connected to the protective cover 13, with the surface of the linkage block 17 open. A strip-shaped through hole is provided, which is slidably connected to the fixed column 16; the rotating disk 15 is rotatably connected to the side surface of the protective cover 13, and a transmission belt 18 (the connecting part is a transmission belt) is connected between one end of the rotating disk 15 and the adjacent second telescopic rod 702 located below. When the spraying mechanism 2 moves along the length direction of the support column 1, the second telescopic rod 702 drives the rotating disk 15 to rotate through the transmission belt 18. The rotating disk 15 drives the movable plate 14 to swing up and down through the cooperation of the fixed column 16 and the strip-shaped through hole, so that the spray nozzle 6 on the movable plate 14 swings up and down at the same time; the movable plate 14 is also a telescopic structure (the prior art will not be described in detail).

[0026] Combination Figure 1 , Figure 5 and Figure 6 As shown, when the spraying mechanism 2 moves up and down along the length of the support column 1, the transmission wheel 10 drives the second telescopic rod 702 to rotate. The second telescopic rod 702, through the transmission belt 18, drives the rotating disk 15 to rotate. The rotating disk 15 simultaneously drives the fixed column 16 on its surface to move together. The moving fixed column 16 cooperates with the strip-shaped through hole, causing the linkage block 17 to swing up and down around its rotation center. The linkage block 17 then drives the movable plate 14 and the spraying device installed on its surface to swing up and down, simulating the actions of the worker when spraying anti-corrosion coating. This ensures the thickness and uniformity of the sprayed anti-corrosion coating, thereby improving the quality of the final coating on the surface of the support column 1.

[0027] In this embodiment, four adjustable bolts 19 are connected between the protective cover 13 and the first telescopic bracket 301. The four adjustable bolts 19 are spaced apart around the protective cover 13. The peripheral surface of each adjustable bolt 19 is rotatably connected to the first telescopic bracket 301, and one end of the adjustable bolt 19 is rotatably connected to the protective cover 13. The distance between the support cover and the support column 1 can be adjusted, thereby adjusting the distance between the nozzle 6 and the surface of the support column 1, and adjusting the thickness of the sprayed coating and the spraying area.

[0028] Working principle of this invention: Before spraying paint onto the surface of the support column 1, move the spraying mechanism 2 close to the support column 1, then rotate and open one of the first telescopic brackets 301. Adjust the lengths of the first telescopic bracket 301 and the second telescopic bracket 302 according to the size of the support column 1. After adjustment, move the spraying mechanism 2 close to the surface of the support column 1, then reset the previously opened first telescopic bracket 301 so that the spraying mechanism 2 forms a rectangle around the support column 1. Then, activate the hydraulic telescopic cylinders 4 on the first telescopic bracket 301 in sequence to... The two hydraulic telescopic cylinders 4 on the second telescopic bracket 302 are used. At this time, the spraying mechanism 2 is fixed on the surface of the support column 1. The drive motor 502 is started, which drives the spraying mechanism 2 to move to the top of the support column 1. At this time, no spraying is performed. During the upward movement, the first telescopic rod 701 and the second telescopic rod 702 will rotate and brush the surface of the support column 1 to remove surface or other debris. When the spraying mechanism 2 moves to the top of the support column 1, the electromagnet 12 is energized, so that the cleaning unit 7 located above the nozzle 6 no longer contacts the surface of the support column. Then, the drive motor 502 is controlled to rotate in the opposite direction, driving the spraying mechanism 2 to move downward. At the same time, the air pump is started to deliver paint to the nozzle 6 and begin spraying paint onto the surface of the support column 1. During the downward movement, the cleaning unit 7 located below the nozzle 6 will perform a second scrubbing on the surface of the support column 1 to improve the adhesion of the subsequent paint. In addition, the second telescopic rod 702 below the nozzle 6 indirectly drives the movable plate 14 and the nozzle 6 to swing up and down through the transmission belt, simulating the action of the worker when spraying anti-corrosion paint, improving the uniformity and quality of paint spraying. When the spraying mechanism 2 moves to the bottom of the support column 1, the air pump and drive motor 502 are turned off. Then, the hydraulic telescopic cylinder 4 is extended simultaneously, so that the first telescopic bracket 301 and the second telescopic bracket 302 are unfolded. The first telescopic bracket 301 is rotated and opened, and the spraying mechanism 2 is moved out of the outer surface of the support column 1. Then, the spraying mechanism 2 is rotated and moved again to be close to the outer surface of the support column 1. At this time, the two first telescopic brackets 301 are aligned with the two sides of the support column 1 that have not been sprayed with paint before. Then, the above process is repeated to complete the spraying of the four sides of the support column 1.

[0029] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A device for spraying anticorrosive coating on the surface of a support column (1) in a water pool, comprising a support column (1) and a spraying mechanism (2) arranged on the surface of the support column (1) and moving along the length direction of the support column (1), characterized in that: The spraying mechanism (2) includes a support unit (3) spaced apart on the outside of the support column (1), a walking unit (5) and a spraying unit mounted on the support unit (3); The support unit (3) includes two first telescopic brackets (301) symmetrically arranged about the support column (1) and two second telescopic brackets (302) symmetrically arranged about the support column (1) in another direction. The two first telescopic brackets (301) and the two second telescopic brackets (302) together form a rectangular structure. One end of each of the two first telescopic brackets (301) is hinged to one of the second telescopic brackets (302), and the other end of each of the two first telescopic brackets (301) is detachably connected to the other second telescopic bracket (302). Both the first telescopic brackets (301) and the second telescopic brackets (302) can extend and retract along their length in the horizontal plane. Both the first telescopic brackets (301) and the second telescopic brackets (302) are connected with horizontally arranged hydraulic telescopic cylinders (4) for adjusting the amount of extension and retraction. The walking unit (5) includes multiple guide wheels (501) mounted on the first telescopic bracket (301) and the second telescopic bracket (302); the multiple guide wheels (501) are arranged circumferentially around the support column (1); each of the two first telescopic brackets (301) is equipped with a drive motor (502) for driving the guide wheels (501) to rotate; The spraying unit includes multiple nozzles (6) fixed on the first telescopic bracket (301), and the multiple nozzles (6) are connected to an air pump located outside the spraying mechanism (2). The input end of the air pump is connected to a paint storage tank. Each of the two first telescopic brackets (301) is equipped with a cleaning unit (7) for cleaning the surface of the support column (1). The cleaning unit (7) includes two first telescopic rods (701) and second telescopic rods (702) arranged vertically and horizontally. The peripheral surfaces of the first telescopic rods (701) and the second telescopic rods (702) are connected with bristles that abut against the surface of the support column (1), and the bristles of the first telescopic rods (701) and the second telescopic rods (702) cover one side surface of the support column (1). Each of the first telescopic brackets (301) is provided with two cleaning units (7), and the two cleaning units (7) are arranged symmetrically about the first telescopic bracket (301). The cleaning unit (7) further includes movable blocks (703) disposed at both ends of the first telescopic rod (701) and the second telescopic rod (702); the first telescopic rod (701) and the second telescopic rod (702) are rotatably connected to the movable blocks (703); a fixed block (704) is elastically slidably disposed at one end of the movable block (703) near the first telescopic bracket (301), and the fixed block (704) is fixedly connected to the first telescopic bracket (301); Each movable block (703) has two worm gears (8) on its side away from the cleaning unit (7), which are coaxial with and powered by the first telescopic rod (701) and the second telescopic rod (702). The two worm gears (8) mesh with a horizontally arranged worm (9). The worm (9) is rotatably connected to the movable block (703), and a transmission wheel (10) is fixedly connected to one end of the worm gear (8). When the spraying mechanism (2) moves along the length of the support column (1), the transmission wheel (10) contacts the surface of the support column (1) and drives the first telescopic rod (701) and the second telescopic rod (702) to rotate synchronously through the worm gear (8) and the worm (9).

2. The anti-corrosion coating spraying device for the surface of the support column in a water tank according to claim 1, characterized in that: Both of the first telescopic brackets (301) are connected to a vertically placed protective cover (13) that can extend and retract along its length. A movable plate (14) is rotatably connected to the side surface of the protective cover (13) near the support column (1). The nozzles (6) are all mounted on the surface of the movable plate (14). A reciprocating swing assembly is provided between the movable plate (14) and the protective cover (13). A transmission component is connected between the reciprocating swing assembly and the adjacent first telescopic rod (701). When the spraying mechanism (2) moves along the length of the support column (1), the first telescopic rod (701) simultaneously drives the reciprocating swing assembly to move, so that the nozzles (6) on the movable plate (14) swing up and down.

3. The anti-corrosion coating spraying device for the surface of the support column in a water tank according to claim 2, characterized in that: Multiple adjustable bolts (19) are connected between the protective cover (13) and the first telescopic bracket (301); the peripheral surface of the adjustable bolt (19) is rotatably connected to the first telescopic bracket (301), one end of the adjustable bolt (19) is rotatably connected to the protective cover (13), and the distance between the protective cover (13) and the support column (1) can be adjusted.

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