Spray painting equipment for water-cooled walls of thermal power plant boilers

Abstract

We provide a spray painting apparatus for water-cooled walls of boilers in thermal power plants. [Solution] The spray painting apparatus for the water-cooled walls of a thermal power plant boiler includes two sets of guide rails provided at the upper end of the spray painting apparatus. Inside the spray painting apparatus, one set of drive mechanisms 22 is rotatably provided corresponding to each of the two sets of guide rails, and a brush roller is fixedly provided between the two sets of drive mechanisms. A spray painting member 24 is fixedly mounted inside the spray painting apparatus body 21. The brush roller, by brushing, makes the paint thickness on the surface of the water-cooled wall tubes uniform, thereby achieving highly efficient and high-quality spray painting of the rows of water-cooled wall tubes.

Description

Technical Field

[0001] The present invention relates to the technical field of spray coating devices, and specifically to a spray coating device for the water-cooled wall of a thermal power plant boiler.

Background Art

[0002] The water-cooled wall tube row is usually laid on the inner wall surface of the furnace and is mainly used to absorb the radiant heat released from the flames and high-temperature flue gases in the furnace, and has a cooling and protective effect on the furnace wall.

[0003] In the process of use, the main role of the water-cooled wall tube row in the furnace is to absorb a large amount of radiant heat of the high-temperature flue gas. Since the coal slag and high-temperature flue gas corrode the surface of the water-cooled wall tube row, before starting use, it is necessary to spray-coat the surface of the water-cooled wall tube row to improve the service life and use effect of the water-cooled wall tube row.

[0004] The conventional Chinese patent with the disclosure number CN212167913U discloses a water-cooled wall tube row spray coater. By controlling the spray gun to move horizontally and / or vertically, the spray gun can spray the water-cooled wall tube row at a constant speed or a variable speed, and the spray coating uniformity and spray coating effect of the water-cooled wall tube row can be improved.

[0005] The above prior art has the following deficiencies. Since the surface of the entire water-cooled wall tube row is in a continuous arc shape, in the process of spray coating while the spray gun moves horizontally, the paint flows along the arc surface of the water-cooled wall tube row for a certain distance when it is not completely solidified, accumulates between the two sets of tube rows, the spray coating thickness is not uniform, and furthermore, the spray coating effect is poor. There are steps such as sandblasting and rust removal before spray coating, and a large amount of gravel remains on the surface of the water-cooled wall tube row, which also affects the subsequent spray coating effect.

Summary of the Invention

Problems to be Solved by the Invention

[0006] The present invention aims to solve, at least to some extent, one of the technical problems in related technologies. [Means for solving the problem]

[0007] To achieve the above objective, the present invention provides a spray painting apparatus for a water-cooled wall of a thermal power plant boiler, comprising a spray painting apparatus body, the spray painting apparatus body comprising a spray painting apparatus body, the spray painting apparatus body having two sets of guide rails provided at its upper end, the two sets of drive mechanisms provided rotatably inside the spray painting apparatus body corresponding to the two sets of guide rails, such that the spray painting apparatus body travels on the guide rails. A brush roller is fixedly provided between the two sets of drive mechanisms, a relief groove is provided in the spray painting apparatus body corresponding to the brush roller, a rotating shaft is fixedly provided in the direction toward the two sets of guide rails of the brush roller, and the rotating shaft is provided so as to be rotatably connected to the spray painting apparatus body. The present invention provides a spray painting apparatus in which a spray painting member is fixedly mounted inside the main body of the spray painting apparatus, the spray painting member is positioned in front of the brush roller along the spray painting travel direction, and a driven mechanism for controlling the main body of the spray painting apparatus to automatically spray paint is fixedly mounted to one end of the main body of the spray painting apparatus.

[0008] The present invention uses a drive mechanism to move the entire spray painting apparatus horizontally. During movement, the drive mechanism causes the driven mechanism to continuously reciprocate horizontally, thereby guiding the spray painting member to perform gravel removal and surface spray painting on the surface of the water-cooled wall tube array. During movement, the drive mechanism further brushes the surface of the water-cooled wall tube array, accelerating the paint solidification rate, ensuring a uniform paint thickness on the surface of the water-cooled wall tubes, and effectively avoiding the effect of gravel on the spray painting. This achieves highly efficient and high-quality spray painting of the water-cooled wall tube array, extending its service life.

[0009] Selectively, on each side of the spray painting apparatus body corresponding to two sets of guide rails, a set of fixing lugs is provided symmetrically, the fixing lugs extend in the direction of the guide rails and are arranged in an L-shape, the fixing lugs are provided with rotational connection holes, and the rotating shaft is provided to be rotatably connected to the rotational connection holes.

[0010] Furthermore, the drive mechanism includes a gear provided on the rotating shaft, grooves are provided in the guide rail, a rack rail is provided in the grooves, the gear is provided to mesh with the rack rail, and a drive member for rotating the rotating shaft is provided at the end of one of the rotating shafts away from the brush roller.

[0011] Furthermore, a fixing member is provided below the drive member to support the drive member, the fixing member is provided in an L-shape and its end is bent toward the direction of the guide rail, a first chute is provided on the side of the guide rail opposite the spray painting apparatus body, and the end of the fixing member toward the guide rail is provided to be slidably connected to the first chute.

[0012] Furthermore, the spray painting member includes a paint tube and an air tube provided perpendicular to the direction of the guide rail, the air tube is provided parallel to the paint tube in front of the paint tube along the spray painting travel direction, a plurality of sets of paint nozzles are provided vertically below the paint tube, a plurality of sets of air nozzles are provided vertically below the air tube, and the spray painting apparatus body is provided with relief through-holes for the air tube and paint tube to pass through. The paint pipe and the air pipe are connected via a sleeve, and a supply pipe for supplying paint to the paint pipe is provided vertically upward at the point where the sleeve connects to the paint pipe, and an air supply pipe is provided parallel to the supply pipe and in the same direction at the position between the paint pipe and the air pipe of the sleeve. The driven mechanism includes a piston rod inserted into the sleeve, the piston rod having paint holes corresponding to the paint pipe and supply port, a first check valve provided in the sleeve at the point where the sleeve and the air pipe communicate, a second check valve provided in the air supply pipe, and a rubber seal ring provided at the end of the piston rod facing the air pipe.

[0013] Furthermore, the distance between the paint hole and the rubber seal ring is smaller than the distance between the air supply pipe and the supply pipe.

[0014] Furthermore, the driven mechanism includes an extendable member provided perpendicularly to one side of the piston rod, a U-shaped plate provided at the end of the extendable member away from the piston rod, the U-shaped plate includes a connecting part and a power unit, the connecting part is fixedly connected to the piston rod and provided parallel to the brush roller, the power unit is provided perpendicularly to both ends of the connecting part, a rack is provided on the side of the power unit facing the guide rail, a half-toothed disc is provided on the rotating shaft so as to mesh with the rack, and the power unit is provided so as to be slidably connected to the spray painting apparatus body.

[0015] Furthermore, a fixed strip is provided at a position corresponding to the power unit of the spray painting apparatus body, a second chute is provided on the fixed strip, and a T-shaped slider is provided on the power unit so as to fit into the second chute.

[0016] Furthermore, the expandable member includes a group of guide plates fixedly connected to the connection portion, a sliding sleeve is fitted to the outside of the group of guide plates, the piston rod is provided to pass through the sliding sleeve and to be slidably connected to the sliding sleeve, the sliding sleeve is provided with a sliding hole through which the group of guide plates passes, and a first spring is provided between the inside of the sliding sleeve and the connection portion to move the sliding sleeve along the length direction of the piston rod.

[0017] Furthermore, the outlet direction of the air nozzle is offset in the opposite direction from the paint pipe.

[0018] Furthermore, a fixing device is provided on one side of the two sets of the guide rails. The fixing device includes a first fixing plate and a third fixing plate fixedly connected to the side wall of the guide rail, and a second fixing plate movably provided between the first fixing plate and the third fixing plate. A second spring is provided to be fixedly connected between the first fixing plate and the second fixing plate. A clamping gap is provided between the second fixing plate and the third fixing plate so as to clamp and fix the components on the water-cooled wall.

[0019] Furthermore, one support leg is provided at a position corresponding to the two sets of guide rails at an end of the spray coating device body away from the driving mechanism. A support slider slidably connected to the guide rail is provided at an end of each support leg facing the guide rail.

[0020] Furthermore, a resistance wire is provided inside the brush roller.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present invention.

[0022] The above-mentioned and / or additional aspects and advantages of the present invention will become apparent and easier to understand from the description of the embodiments in connection with the following attached drawings.

Brief Description of the Drawings

[0023] [Figure 1] It is a schematic diagram of the overall structure of the present invention. [Figure 2] It is a schematic diagram of the structure of the guide rail of the present invention. [Figure 3] It is a schematic diagram of the structure of the spray coating device of the present invention. [Figure 4] It is a schematic diagram of the structure of the driving mechanism of the present invention. [Figure 5] It is a schematic diagram of the structure of the spray coating device body of the present invention. [Figure 6]This is a schematic diagram of the structure of the driven mechanism and spray coating member of the present invention. [Figure 7] This is a schematic diagram of the structure of the driven mechanism of the present invention. [Figure 8] This is a schematic diagram of the structure of a spray coating member of the present invention. [Modes for carrying out the invention]

[0024] The embodiments of the present invention will now be described in detail. Examples of the embodiments are shown in the drawings, and the same or similar reference numerals from beginning to end represent the same or similar elements, or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are for illustrative purposes only and should not be understood as limitations of the present invention.

[0025] This application proposes a spray coating apparatus for water-cooled walls of boilers in thermal power plants, which will be described in detail below with reference to Figures 1 to 8.

[0026] The spray painting apparatus 2 for the water-cooled wall of a thermal power plant boiler includes two sets of guide rails 1, the spray painting apparatus 2 having its upper end attached to the spray painting apparatus 2, the spray painting apparatus 2 includes a spray painting apparatus body 21, and inside the spray painting apparatus body 21, one set of drive mechanisms 22 is rotatably provided, corresponding to each of the two sets of guide rails 1, so that the spray painting apparatus body 21 runs on the guide rails 1.

[0027] A brush roller 226 is fixedly mounted between two sets of drive mechanisms 22, and a relief groove 216 is provided in the spray painting apparatus body 21 corresponding to the brush roller 226, thereby enabling the brush roller 226 to rotate stably. A rotating shaft 222 is fixedly mounted on both sides of the brush roller 226 in the direction toward the two sets of guide rails 1, and the rotating shaft 222 is provided so as to be rotatably connected to the spray painting apparatus body 21.

[0028] A spray painting component 24 is fixedly mounted inside the spray painting apparatus body 21, and the spray painting component 24 is positioned in front of the brush roller 226 along the spray painting travel direction. A driven mechanism 23 for controlling the spray painting apparatus body 21 to automatically spray paint is fixedly mounted to one end of the spray painting apparatus body 21.

[0029] In this invention, after positioning the guide rail 1 and the spray coating device 2 on the surface of the water-cooled wall tube row, the entire spray coating device 2 is moved horizontally by the drive mechanism 22. During movement, the drive mechanism 22 causes the driven mechanism 23 to continuously reciprocate horizontally, thereby guiding the spray coating member 24 continuously to perform gravel removal and surface spray coating work on the surface of the water-cooled wall tube row. During movement, the drive mechanism 22 further brushes the surface of the water-cooled wall tube row, increases the paint solidification rate, makes the paint thickness on the surface of the water-cooled wall tubes uniform, and effectively avoids the effect of gravel on the spray coating, thereby achieving highly efficient and high-quality spray coating of the water-cooled wall tube row and extending its service life.

[0030] In some embodiments, a set of fixed lugs 217 are symmetrically provided on both sides of the spray painting apparatus body 21 corresponding to two sets of guide rails 1, the fixed lugs 217 extend toward the direction of the guide rails 1, and are arranged in an L-shape, with a rotational connection hole 218 provided in the fixed lugs 217, and a rotating shaft 222 is provided to be rotationally connected to the rotational connection hole 218. Because the rotating shaft 222 is rotationally connected to the fixed lugs 217, the entire drive mechanism 22 pushes the spray painting apparatus body 21 to move horizontally at the same time as it moves.

[0031] In some embodiments, a support leg 212 is provided at each of the two sets of guide rails 1, at the end of the spray painting apparatus body 21 away from the driven mechanism, and a support slider 213 is provided at the end of each support leg 212 facing the guide rail 1, which is slidably connected to the guide rail 1. The installation of the support legs 212 and support sliders 213 makes the spray painting apparatus body 21 more stable while in motion.

[0032] In some embodiments, the drive mechanism 22 includes a gear 221 mounted on a rotating shaft 222, a groove 11 is cut into the guide rail 1, a rack rail 12 is provided within the groove 11, the gear 221 is provided to mesh with the rack rail 12, and a drive member 223 for rotationally driving the rotating shaft is provided at the end of one of the rotating shafts away from the brush roller 226. In one embodiment, the drive member 223 is configured as a servo motor.

[0033] Since the gear 221 is connected by meshing with the rack rail 12, as the entire drive mechanism 22 moves horizontally above the guide rail 1, the brush roller 226 rotates simultaneously, brushing the paint on the surface of the water-cooled wall tube row. This causes the paint to flow, effectively preventing the problem of poor spray coating effectiveness due to uneven spray coating thickness.

[0034] To further prevent paint from running, in some embodiments, a resistance wire 227 is provided inside the brush roller 226. The presence of the resistance wire 227 inside the brush roller 226 allows the brush roller 226 to transfer a certain amount of heat to the paint on the surface of the water-cooled wall tubes while brushing the surface of the water-cooled wall tubes, thereby accelerating the paint's solidification rate, more effectively preventing paint from running, and enhancing the spray painting effect.

[0035] In some embodiments, a fixing member 224 is provided below the drive member 223 to support the drive member 223, the fixing member 224 is provided in an L-shape and its end is bent toward the guide rail 1, a first chute 13 is provided on the side of the guide rail 1 opposite the spray painting apparatus body 21, and the end of the fixing member 224 toward the guide rail 1 is provided to be slidably connected to the first chute 13. The installation of the fixing member 224 allows for effective support of the drive member 223, and the sliding connection between the first chute 13 and the fixing member 224 ensures stable tracking support of the drive member 223 by the fixing member 224 during movement.

[0036] In some embodiments, the spray painting member 24 includes a paint tube 244 and an air tube 246 that are provided perpendicular to the direction of the guide rail 1, the air tube 246 being provided parallel to the paint tube 244 and in front of the paint tube 244 along the spray painting travel direction, multiple sets of paint nozzles 245 being provided perpendicularly below the paint tube 244, and multiple sets of air nozzles 247 being provided perpendicularly below the air tube 246, and the spray painting apparatus body 21 is provided with a relief through-hole 211 through which the air tube 246 and the paint tube 244 pass.

[0037] The combination of the paint pipe 244 and multiple sets of paint nozzles 245 allows the paint contained in the paint pipe 244 to be supplied to each paint nozzle 245, and each paint nozzle 245 is provided at equal intervals, thereby making the paint spray more uniform and allowing the paint area to more stably cover the entire area between the guide rails 1.

[0038] The installation of the air pipe 246 and gas injection holes effectively removes gravel, dust, and loose rust from the water-cooled wall tube row, removes foreign matter adhering to the water-cooled wall tube row by airflow, and provides a flat paint surface for the painting work of the rear paint nozzle 245, thereby making the painting process more uniform.

[0039] In some embodiments, the outlet direction of the air nozzle 247 is offset from the direction opposite to that of the paint pipe 244. The offset placement of the air nozzle 247 ensures that when gas is injected to remove foreign matter, the blown-away foreign matter flies away from the spray painting apparatus body, further reducing the possibility of foreign matter being generated on the paint surface.

[0040] A sleeve 241 connects the paint pipe 244 and the air pipe 246. A supply pipe 242 for supplying paint to the paint pipe 244 is provided vertically upward at the point where the sleeve 241 connects to the paint pipe 244. An air supply pipe 243 is provided parallel to and in the same direction as the supply pipe 242 at the point between the paint pipe 244 and the air pipe 246. The air supply pipe 243 and the supply pipe 242 are connected to an external air source and supply components.

[0041] The driven mechanism 23 includes a piston rod 234 inserted into the sleeve 241, the piston rod 234 having paint holes 236 corresponding to the paint pipe 244 and the supply port, the paint holes 236 being three-sided, a first check valve 248 provided in the sleeve 241 at the point where the sleeve 241 and the air pipe 246 communicate, a second check valve 249 provided in the air supply pipe 243, and a rubber seal ring 235 provided at the end of the piston rod 234 facing the air pipe 246.

[0042] The piston rod 234 separates the supply pipe 242 and the air intake pipe 243, and the air inlet is provided in communication with the sleeve 241, allowing gas to enter the sleeve along the air intake pipe 243. When the piston rod 234 is compressed inside the sleeve 241, under the action of the rubber seal ring 235, the air pressure between the piston rod 234 inside the sleeve 241 and the first check valve 248 increases, the first check valve 248 and the second check valve 249 open, and the airflow enters the sleeve 241 along the air intake pipe 243 and into the air pipe 246, thereby performing foreign matter removal by gas injection.

[0043] When the piston rod 234 is compressed into the sleeve 241, the three-sided paint hole 236 communicates with the supply pipe 242 and the paint pipe 244, and the paint enters the paint hole 236 along the supply pipe 242 and is transported to the paint pipe 244 through the two three-sided outlets, thereby performing the painting operation.

[0044] In one embodiment, sealing rings are provided at the openings at each end of the three-sided paint holes 236. This prevents paint from leaking out through the gaps between the supply pipe 242 and the paint holes 236, and between the paint holes 236 and the paint pipe 244, thereby reducing the risk of paint leaking out and blocking the sleeve 241.

[0045] In some embodiments, the distance between the paint hole 236 and the rubber seal ring 235 is smaller than the distance between the air intake pipe 243 and the supply pipe 242. Also, the travel distance of the piston rod 234 is smaller than the distance between the air intake pipe 243 and the supply pipe 242, ensuring that the supply hole 236 always remains in communication with the inside of the sleeve 241, thereby avoiding the situation where the piston rod 234 obstructs the air intake pipe 243, preventing gas from entering the air pipe 246.

[0046] The surface of the water-cooled wall tube array is spray-painted, and during the spray painting process, the entire spray painting apparatus 2 moves slowly horizontally, allowing for the removal of gravel before painting by spray painting a rectangular area on the surface of the water-cooled wall tube array. This prevents waste during the first spray painting at the start of the operation. Since gravel removal begins at the head of the water-cooled wall tube array, the spray painting operation is positioned behind the gravel removal operation. Performing the operations simultaneously would result in paint waste during the stroke as the spray painting operation moves above the water-cooled wall tube array, so alternating gravel removal and spray painting operations avoids paint waste and reduces costs.

[0047] In some embodiments, the driven mechanism includes an extendable member provided perpendicularly to one side of the piston rod 234, the extension distance of which is less than the distance between the air supply pipe 243 and the supply pipe 242, a U-shaped plate 231 provided at the end of the extendable member away from the piston rod 234, the U-shaped plate 231 including a connector and a power unit, the connector being fixedly connected to the piston rod 234 and provided parallel to the brush roller 226, the power unit being provided perpendicularly to both ends of the connector, a rack 232 provided on the side of the power unit facing the guide rail 1, a half-toothed disc 225 provided on the rotating shaft to mesh with the rack 232, and the power unit being provided to be slidably connected to the spray painting apparatus body 21. As the rotating shaft 222 rotates, it simultaneously rotates the semi-toothed disc 225, which meshes with the rack 232 during rotation, thereby compressing the U-shaped plate 231 into the spray painting apparatus body 21 as it moves, compressing the expandable member, which in turn moves the piston rod 234 into the sleeve 241, and when the paint holes 236 are aligned with the supply pipe 242 and paint pipe 244, spray painting can be performed.

[0048] In some embodiments, the expandable member includes a group of guide plates 238 fixedly connected to a connection, the group of guide plates 238 includes two opposing guide plates 238, a sliding sleeve is fitted to the outside of the group of guide plates 238, a piston rod 234 is provided to pass through the sliding sleeve and to be slidably connected to the sliding sleeve, the sliding sleeve is provided with a sliding hole through which the group of guide plates 238 passes, each guide plate 238 can pass through the sliding hole, and a first spring 239 is provided between the inside of the sliding sleeve and the connection to move the sliding sleeve along the length of the piston rod 234.

[0049] When the U-shaped plate 231 is moved while being compressed into the body 21 of the spray painting apparatus, the installation of the first spring 239 allows the sliding sleeve to slide on the group of guide plates 238, that is, when the sliding sleeve comes into contact with the sleeve 241, the U-shaped plate 231 can be moved while compressing the piston rod 234 into the sleeve 241.

[0050] When the U-shaped plate 231 resets the piston rod 234, the paint hole 236 terminates its connection with the supply pipe 242, stopping the spray painting operation. Simultaneously, the gas pressure in the sleeve 241 closes the first check valve 248 and opens the second check valve 249, refilling the sleeve 241 with gas and waiting for the next operation.

[0051] In some embodiments, a fixed strip 215 is provided in the spray painting apparatus body 21 at a position corresponding to the power unit, the fixed strip 215 is provided parallel to the guide rail 1, a second chute 214 is provided on the fixed strip 215, and a T-shaped slider 233 is provided in the power unit so as to fit into the second chute 214, the T-shaped slider 233 includes an integrally provided sliding block and a bearer block, the sliding block is inserted into the second chute 214 and the bearer block is provided on the side of the second chute 214 opposite to the power unit, thereby providing support to the power unit, that is, providing support to the support of the U-shaped plate 231.

[0052] In some embodiments, a fixing device is provided on one side of two sets of guide rails 1, and the fixing device includes a first fixing plate 15 and a third fixing plate 14 fixedly connected to the side wall of the guide rail 1, and a second fixing plate 17 movably provided between the first fixing plate 15 and the third fixing plate 14.

[0053] A second spring 16 is provided so as to be fixedly connected between the first fixing plate 15 and the second fixing plate 17. A clamping gap is provided between the second fixing plate 17 and the third fixing plate 14 for clamping and fixing components on the water-cooled wall.

[0054] When fixing and installing, first the water-cooled wall tube row is placed between the third fixing plate 14 and the second fixing plate 17, and a reset thrust is applied to the second fixing plate 17 by the second spring 16. The second fixing plate 17 and the third fixing plate 14 then provide a stable clamping force to the water-cooled wall tube row, achieving stable and rapid fixing.

[0055] In the description of the present invention, the directions or positional relationships indicated by terms such as "center," "vertical," "horizontal," "length," "width," "thickness," "top," "bottom," "front," "back," "left," "right," "perpendicular," "horizontal," "top," "bottom," "inside," "outside," "clockwise," "counterclockwise," "axial direction," "radial direction," and "circumferential direction" are based on the directions or positional relationships shown in the drawings and are merely for the purpose of facilitating the description of the present invention. They do not indicate or imply that the indicated or suggested device or element needs to be configured and operate in a specific direction or orientation, and therefore should not be understood as limitations on the present invention.

[0056] Furthermore, the terms "first" and "second" are merely descriptive and should not be understood as indicating or implying relative importance, or implicitly indicating the number of technical features being described. Therefore, the features defining "first" and "second" may explicitly or implicitly include at least one feature. In the description of this invention, "multiple" means at least two, for example, two, three, etc., unless otherwise specifically limited.

[0057] In this invention, it should be further explained that, unless explicitly stated and limited, terms such as “attachment,” “connection,” “bonding,” and “fixing” should be understood broadly, and may include, for example, a fixed connection, a removable connection, or an integrated connection; a mechanical connection, an electrical connection, a connection that can communicate with one another; a direct connection, an indirect connection via an intermediate medium, a connection within two elements, or an interaction relationship between two elements. Unless otherwise specified, those skilled in the art will be able to understand the specific meaning of the above terms in this invention depending on the specific circumstances.

[0058] In the present invention, unless otherwise specifically defined or limited, when the first feature is located "above" or "below" the second feature, the first and second features may be in direct contact, or they may be indirectly in contact via an intermediate mediator. Furthermore, when the first feature is located "above," "above," or "on the top surface" of the second feature, the first feature is located directly above or diagonally above the second feature, or it simply indicates that the horizontal height of the first feature is higher than that of the second feature. When the first feature is located "below," "below," or "on the bottom surface" of the second feature, the first feature is located directly below or diagonally below the second feature, or it simply indicates that the horizontal height of the first feature is lower than that of the second feature.

[0059] In this invention, terms such as “one embodiment,” “several embodiments,” “example,” “specific example,” or “several examples” mean that certain properties, structures, materials, or features described in relation to at least one embodiment or example of the invention are included. In this specification, the general expressions of the above terms do not necessarily apply to the same embodiment or example. Furthermore, the specific properties, structures, materials, or features described may be combined in appropriate ways in any one or more embodiments or examples. Furthermore, where not inconsistent, those skilled in the art may combine different embodiments or examples and features of different embodiments or examples described herein.

[0060] Although embodiments of the present invention have been shown and explained above, these embodiments are illustrative and should not be understood as limitations to the present invention. Those skilled in the art can change, modify, substitute, and transform the above embodiments within the scope of the present invention. [Explanation of Symbols]

[0061] 1. Guide rail 11, groove 12. Rack rail 13. First shot 14, 3rd fixing plate 15, 1st fixed plate 16. Second Spring 17, 2nd fixing plate 2. Spray painting equipment 21. Spray painting apparatus main unit 211, escape through hole 212, supporting leg 213, Support Slider 214, 2nd shot 215, fixed strip 216, escape groove 217, Fixed lag 218, Rotating connection hole 22. Drive mechanism 221, gear 222, rotation axis 223, drive member 224, Fixing member 225, Semi-tooth disc 226, Brush roller 227, Resistance wire 23, driven mechanism 231, U-shaped plate 232, Rack 233, T-shaped slider 234, Piston rod 235, Rubber seal ring 236, paint hole 237, connecting member 238, Guide plate 239, 1st Spring 24. Spray-painted components 241, Sleeve 242, supply pipe 243, Air supply pipe 244, paint tube 245, Paint nozzle 246, air pipe 247, Air nozzle 248. First check valve 249. Second check valve.

Claims

1. A spray painting apparatus for a water-cooled wall of a thermal power plant boiler, comprising two sets of guide rails provided at the upper end of the spray painting apparatus, The spray painting apparatus body is included, and inside the spray painting apparatus body, one set of drive mechanisms is rotatably provided corresponding to each of two sets of guide rails, so that the spray painting apparatus body runs on the guide rails. A brush roller is fixedly provided between the two sets of drive mechanisms, a relief groove is provided in the spray painting apparatus body corresponding to the brush roller, a rotating shaft is fixedly provided in the direction toward the two sets of guide rails of the brush roller, and the rotating shaft is provided so as to be rotatably connected to the spray painting apparatus body. A spray painting apparatus characterized in that a spray painting member is fixedly mounted inside the main body of the spray painting apparatus, the spray painting member is provided in front of the brush roller along the spray painting travel direction, and a driven mechanism for controlling the main body of the spray painting apparatus to automatically spray paint is fixedly mounted to one end of the main body of the spray painting apparatus.

2. The spray painting apparatus for a water-cooled wall of a thermal power plant boiler according to claim 1, characterized in that a set of fixing lugs is symmetrically provided on both sides of the spray painting apparatus body corresponding to two sets of guide rails, the fixing lugs extend in the direction of the guide rails and are provided in an L-shape, the fixing lugs are provided with rotational connection holes, and the rotating shaft is provided so as to be rotationally connected to the rotational connection holes.

3. The spray painting apparatus for a water-cooled wall of a thermal power plant boiler according to claim 2, characterized in that the drive mechanism includes a gear provided on the rotating shaft, grooves are made in the guide rail, a rack rail is provided in the grooves, the gear is provided so as to mesh with the rack rail, and a drive member for rotating the rotating shaft is provided at the end of one of the rotating shafts away from the brush roller.

4. A spray painting apparatus for a water-cooled wall of a thermal power plant boiler according to claim 3, characterized in that a fixing member for supporting the driving member is provided below the driving member, the fixing member is provided in an L-shape and the end of the fixing member is bent toward the direction of the guide rail, a first chute is provided on the side of the guide rail opposite to the spray painting apparatus body, and the end of the fixing member toward the guide rail is provided to be slidably connected to the first chute.

5. The spray painting member includes a paint tube and an air tube provided perpendicular to the direction of the guide rail, the air tube is provided parallel to the paint tube and in front of the paint tube along the spray painting travel direction, a plurality of sets of paint nozzles are provided vertically below the paint tube, a plurality of sets of air nozzles are provided vertically below the air tube, and the spray painting apparatus body is provided with relief through-holes for the air tube and paint tube to pass through. The paint pipe and the air pipe are connected via a sleeve, and a supply pipe for supplying paint to the paint pipe is provided vertically upward at the point where the sleeve connects to the paint pipe, and an air supply pipe is provided parallel to the supply pipe and in the same direction at the position between the paint pipe and the air pipe of the sleeve. The spray painting apparatus for a water-cooled wall of a thermal power plant boiler according to claim 1, characterized in that the driven mechanism includes a piston rod inserted into the sleeve, the piston rod is provided with paint holes corresponding to the paint pipe and the supply port, a first check valve is provided in the sleeve at the point where the sleeve and the air pipe communicate, a second check valve is provided in the air supply pipe, and a rubber seal ring is provided at the end of the piston rod facing the air pipe.

6. The spray painting apparatus for a water-cooled wall of a thermal power plant boiler according to claim 5, characterized in that the distance between the paint hole and the rubber seal ring is smaller than the distance between the air intake pipe and the supply pipe.

7. The driven mechanism includes an extendable member provided perpendicularly to one side of the piston rod, a U-shaped plate is provided at the end of the extendable member away from the piston rod, the U-shaped plate includes a connecting part and a power unit, the connecting part is fixedly connected to the piston rod and provided parallel to the brush roller, the power unit is provided perpendicularly to both ends of the connecting part, a rack is provided on the side of the power unit facing the guide rail, a half-toothed disc is provided on the rotating shaft so as to mesh with the rack, and the power unit is provided so as to be slidably connected to the spray painting apparatus body, characterized in that the spray painting apparatus for water-cooled walls of a thermal power plant boiler is as described in claim 5.

8. The spray painting apparatus for a water-cooled wall of a thermal power plant boiler according to claim 7, characterized in that a fixed strip is provided at a position corresponding to the power unit of the spray painting apparatus body, a second chute is provided on the fixed strip, and a T-shaped slider is provided on the power unit so as to fit into the second chute.

9. The spray painting apparatus for a water-cooled wall of a thermal power plant boiler according to claim 7, characterized in that the expandable member includes a group of guide plates fixedly connected to the connecting portion, a sliding sleeve is fitted to the outside of the group of guide plates, the piston rod is provided so as to penetrate the sliding sleeve and be slidably connected to the sliding sleeve, the sliding sleeve is provided with a sliding hole through which the group of guide plates passes, and a first spring is provided between the inside of the sliding sleeve and the connecting portion to move the sliding sleeve along the longitudinal direction of the piston rod.

10. The spray painting apparatus for a water-cooled wall of a thermal power plant boiler according to claim 5, characterized in that the outlet direction of the air nozzle is offset in the opposite direction from the paint pipe.

11. A fixing device is provided on one side of each of the two sets of guide rails, and the fixing device includes a first fixing plate and a third fixing plate fixedly connected to the side wall of the guide rail, and a second fixing plate movably provided between the first fixing plate and the third fixing plate. A second spring is provided so as to be fixedly connected between the first fixing plate and the second fixing plate. The spray painting apparatus for a water-cooled wall of a thermal power plant boiler according to claim 1, characterized in that a clamping gap is provided between the second fixing plate and the third fixing plate to clamp and fix a component on the water-cooled wall.

12. The spray painting apparatus for a water-cooled wall of a thermal power plant boiler according to claim 1, characterized in that a support leg is provided at each of the two sets of guide rails at the end of the spray painting apparatus body away from the driven mechanism, and a support slider is provided at the end of each support leg facing the guide rail, which is slidably connected to the guide rail.

13. The spray painting apparatus for a water-cooled wall of a boiler in a thermal power plant according to claim 1, characterized in that a resistance wire is provided inside the brush roller.

Images