Thermal power plant boiler water cooling wall spraying device

Abstract

A thermal power plant boiler water wall spraying device comprises two sets of guide rails, the upper ends of the guide rails are provided with a spraying device, and the inner side of the spraying device is rotationally provided with a set of driving mechanisms corresponding to the two sets of guide rails respectively. A brushing roller is fixedly arranged between the two sets of driving mechanisms, rotating shafts are fixedly arranged on the brushing roller in the direction facing the two sets of guide rails, and the rotating shafts are rotationally connected with the spraying machine body; a spraying piece is fixedly installed in the spraying machine body, and a driven mechanism used for controlling the spraying machine body to conduct automatic spraying is fixedly installed at one end of the spraying machine body. The spraying device is driven by the driving mechanism to horizontally move, the driving mechanism forces the driven mechanism to continuously perform horizontal reciprocating motion in the moving process, so that the driven mechanism continuously guides the spraying piece to perform spraying work on the surface of the water-cooled wall tube bundle, and the coating thickness on the surface of the water-cooled wall tube bundle is uniform by performing wiping through the wiping roller; and moreover, the influence of gravels on spraying is effectively avoided, and efficient and high-quality spraying of the water-cooled wall tube bundle is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of spraying devices, in particular to a water-cooled wall spraying device for a boiler in a thermal power plant. Background Art

[0002] Water-cooled wall tubes are usually laid on the inner wall of the furnace, mainly used to absorb the radiant heat released by the flame and high-temperature flue gas in the furnace, and have a cooling and protective effect on the furnace wall.

[0003] Because during use, the main function of the water-cooled wall tube row in the furnace is to absorb a large amount of radiant heat from the high-temperature flue gas. The coal slag and high-temperature flue gas will corrode the surface of the water-cooled wall tube row. Therefore, before putting it into use, the surface of the water-cooled wall tube row needs to be sprayed to improve the service life and use effect of the water-cooled wall tube row.

[0004] The existing Chinese patent with publication number CN212167913U discloses a water-cooled wall tube row spraying machine, which controls the spray gun to move in the horizontal and / or vertical direction so that the spray gun can spray the water-cooled wall tube row at a uniform speed or a variable speed, thereby improving the spraying uniformity and spraying effect of the water-cooled wall tube row.

[0005] The above-mentioned prior art still has the following shortcomings. Since the overall surface of the water-cooled wall tube row is a continuous arc shape, when the spray gun moves in the horizontal direction and sprays, the paint will flow along the arc surface of the water-cooled wall tube row for a certain distance when it is not completely solidified, and accumulate between the two groups of tube rows, resulting in uneven spraying thickness and poor spraying effect. In addition, there are steps such as sandblasting and rust removal before spraying, which will cause a large amount of gravel to remain on the surface of the water-cooled wall tube row, which will also affect the subsequent spraying effect. Summary of the invention

[0006] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0007] To achieve the above object, the present invention proposes a spraying device for a water-cooled wall of a boiler in a thermal power plant, comprising two sets of guide rails, a spraying device is arranged at the upper end of the guide rails, the spraying device comprises a spraying machine body, and a set of driving mechanisms are arranged on the inner side of the spraying machine body to rotate corresponding to the two sets of guide rails respectively, so that the spraying machine body can move on the guide rails;

[0008] A brush roller is fixedly arranged between the two groups of driving mechanisms, a clearance groove is arranged on the spraying machine body corresponding to the brush roller, and a rotating shaft is fixedly arranged on the brush roller toward the two groups of guide rails, and the rotating shaft is rotatably connected to the spraying machine body;

[0009] A spraying part is fixedly installed inside the spraying machine body, and the spraying part is arranged in front of the brush roller along the spraying walking direction. A driven mechanism for controlling the spraying machine body to automatically spray is fixedly installed at one end of the spraying machine body.

[0010] The present invention drives the spray device to move horizontally as a whole through a driving mechanism. During the movement, the driving mechanism forces the driven mechanism to continuously perform horizontal reciprocating motion, so that the driven mechanism continuously guides the spraying parts to clean the sand and gravel on the surface of the water-cooled wall tube row and spray the surface. During the movement, the driving mechanism also brushes the surface of the water-cooled wall tube row and accelerates the solidification speed of the paint, so that the paint thickness on the surface of the water-cooled wall tube is uniform, and the influence of sand and gravel on the spraying is effectively avoided, thereby realizing efficient and high-quality spraying of the water-cooled wall tube row and extending its service life.

[0011] Optionally, the spray machine body is symmetrically provided with a group of fixing ears on both sides corresponding to the two groups of guide rails, the fixing ears are extended toward the guide rails, and the fixing ears are L-shaped, and a rotating connection hole is provided on the fixing ears, and the rotating shaft is rotatably connected to the rotating connection hole.

[0012] Furthermore, the driving mechanism includes a gear arranged on the rotating shaft, a groove is opened on the guide rail, a rack is arranged in the groove, the gear is meshingly connected with the rack, and any one of the connecting shafts is provided with a driving member for driving the connecting shaft to rotate at the end away from the brush roller.

[0013] Furthermore, a fixing member for supporting the driving member is provided below the driving member, the fixing member is arranged in an L-shape and the end of the fixing member is bent toward the guide rail, a first slide groove is provided on the side of the guide rail away from the spraying machine body, and the fixing member is slidably connected to the first slide groove toward one end of the guide rail.

[0014] Furthermore, the spraying part includes a material pipe and an air pipe arranged perpendicular to the direction of the guide rail, the air pipe is arranged parallel to the front of the material pipe along the spraying direction, a plurality of groups of spray heads are vertically arranged below the material pipe, a plurality of groups of air jet heads are vertically arranged below the air pipe, and a through hole for the air pipe and the material pipe to pass through is arranged on the spraying machine body;

[0015] The material pipe and the air pipe are connected via a sleeve, a feed pipe for feeding the material pipe is arranged vertically upward on the sleeve corresponding to the position connected with the material pipe, and an air inlet pipe is arranged on the sleeve corresponding to the position between the material pipe and the air pipe and parallel to the feed pipe in the same direction;

[0016] The driven mechanism includes a piston rod inserted in the sleeve, the piston rod is provided with a material hole corresponding to the material pipe and the feed port, a first one-way valve is provided in the sleeve at the position where the sleeve and the air pipe are connected, a second one-way valve is provided in the air inlet pipe, and a rubber sealing ring is provided at one end of the piston rod facing the air pipe.

[0017] Furthermore, the distance between the material hole and the rubber sealing ring is smaller than the distance between the air intake pipe and the feed pipe.

[0018] Furthermore, the driven assembly includes a telescopic part arranged perpendicularly to one side of the piston rod, a U-shaped plate is provided at one end of the telescopic part away from the piston rod, the U-shaped plate includes a connecting part and a power part, the connecting part is fixedly connected to the piston rod and is arranged parallel to the brush roller, the power part is vertically arranged at both ends of the connecting part, the power part is provided with a rack facing the side of the guide rail, a semi-toothed disc is provided on the connecting shaft which meshes with the rack, and the power part is slidably connected to the spray machine body.

[0019] Furthermore, a fixing bar is provided on the spraying machine body at a position corresponding to the power part, a second slide groove is provided on the fixing bar, and a T-shaped sliding block is provided on the fixing part to cooperate with the second slide groove.

[0020] Furthermore, the telescopic member includes a guide plate group fixedly intercepted with the connecting portion, a sliding sleeve is provided on the outside of the guide plate group, the piston rod passes through the sliding sleeve and is slidingly connected to the sliding sleeve, the sliding sleeve is provided with a sliding hole for the guide plate group to pass through, and a first spring is provided inside the sliding sleeve and between the connecting portion to enable the sliding sleeve to move along the length direction of the piston rod.

[0021] Furthermore, the outlet direction of the air jet head is offset and arranged away from the material pipe.

[0022] Furthermore, a fixing device is provided on one side of the two groups 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 arranged between the first fixing plate and the third fixing plate;

[0023] A second spring is fixedly connected between the first fixing plate and the second fixing plate;

[0024] A clamping gap is provided between the second fixing plate and the third fixing plate so as to clamp and fix the upper components of the water-cooled wall.

[0025] Furthermore, a support leg is respectively provided at the position corresponding to the two groups of guide rails at one end of the spraying machine body away from the driven device, and a supporting sliding block is provided at one end of each support leg facing the guide rail and is slidably connected to the guide rail.

[0026] Furthermore, a resistance wire is provided inside the brush roller.

[0027] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 It is a schematic diagram of the guide rail structure of the present invention;

[0031] Figure 3 It is a schematic diagram of the structure of the spraying device of the present invention;

[0032] Figure 4 It is a schematic diagram of the driving mechanism structure of the present invention;

[0033] Figure 5 It is a schematic diagram of the spraying machine structure of the present invention;

[0034] Figure 6 It is a schematic diagram of the structure of the driven mechanism and the spraying part of the present invention;

[0035] Figure 7 It is a structural schematic diagram of the driven mechanism of the present invention;

[0036] Figure 8 It is a schematic diagram of the structure of the spraying part of the present invention.

[0037] Description of reference numerals:

[0038] 1. Guide rail; 11. Strip groove; 12. Gear rail; 13. First slide groove; 14. Third fixed plate; 15. First fixed plate; 16. Second spring; 17. Second fixed plate; 2. Spraying device; 21. Spraying machine body; 211. Make way through hole; 212. Leg; 213. Support slider; 214. Second slide groove; 215. Fixing bar; 216. Make way groove; 217. Fixing ear; 218. Rotating connecting hole; 22. Driving mechanism; 221. Gear; 222. Rotating shaft; 223. Driving member; 224. Fixing member; 22 5. Half-toothed disc; 226. Brush roller; 227. Resistance wire; 23. Follower mechanism; 231. U-shaped plate; 232. Rack; 233. T-shaped slider; 234. Piston rod; 235. Rubber sealing ring; 236. Material hole; 237. Connector; 238. Guide plate; 239. First spring; 24. Spraying part; 241. Sleeve; 242. Feed pipe; 243. Air inlet pipe; 244. Material pipe; 245. Spray head; 246. Air pipe; 247. Spray head; 248. First one-way valve; 249. Second one-way valve. DETAILED DESCRIPTION

[0039] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout 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 exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0040] The present application proposes a water-cooled wall spraying device for a thermal power plant boiler. Figures 1 to 8 Elaborate in detail.

[0041] A spraying device 2 for a water-cooled wall of a boiler in a thermal power plant comprises two sets of guide rails 1. The upper end of the guide rails 1 is provided with a spraying device 2. The spraying device 2 comprises a spraying machine body 21. The inner side of the spraying machine body 21 is provided with a set of driving mechanisms 22 for rotating respectively corresponding to the two sets of guide rails 1, so that the spraying machine body 21 moves on the guide rails 1.

[0042] A brush roller 226 is fixedly disposed between the two sets of driving mechanisms 22, and a clearance groove 216 is disposed on the spraying machine body 21 corresponding to the brush roller 226, so that the brush roller 226 can rotate stably. The brush roller 226 is fixedly disposed with a rotating shaft 222 in the direction of the two sets of guide rails 1, and the rotating shaft 222 is rotatably connected to the spraying machine body 21;

[0043] A spraying member 24 is fixedly installed inside the spraying machine body 21 and is arranged in front of the brush roller 226 along the spraying direction. A driven mechanism 23 for controlling the spraying machine body 21 to automatically spray is fixedly installed at one end of the spraying machine body 21.

[0044] After the guide rail 1 and the spraying device 2 are arranged on the surface of the water-cooled wall tube row, the driving mechanism 22 drives the spraying device 2 to move horizontally as a whole. During the movement, the driving mechanism 22 forces the driven mechanism 23 to continuously perform horizontal reciprocating motion, so that the driven mechanism 23 continuously guides the spraying part 24 to clean the sand and gravel on the surface of the water-cooled wall tube row and spray the surface. During the movement, the driving mechanism 22 also brushes the surface of the water-cooled wall tube row and accelerates the solidification speed of the paint, so that the paint thickness on the surface of the water-cooled wall tube is uniform, and the influence of sand and gravel on the spraying is effectively avoided, thereby achieving efficient and high-quality spraying of the water-cooled wall tube row and extending its service life.

[0045] In some embodiments, the spraying machine body 21 is symmetrically provided with a set of fixing ears 217 on both sides corresponding to the two sets of guide rails 1, the fixing ears 217 are extended toward the guide rails 1, and the fixing ears 217 are L-shaped, and a rotating connection hole 218 is provided on the fixing ears 217, and the rotating shaft 222 is rotatably connected to the rotating connection hole 218. Because the rotating shaft 222 is rotatably connected to the fixing ears 217, the driving mechanism 22 as a whole pushes the spraying machine body 21 to move horizontally during the movement.

[0046] In some embodiments, a support leg 212 is provided at the position of the two sets of guide rails 1 at one end of the spraying machine body 21 away from the driven device, and each support leg 212 is provided with a support slider 213 slidably connected to the guide rail 1 at one end facing the guide rail 1. The arrangement of the support leg 212 and the support slider 213 can make the spraying machine body 21 more stable during movement.

[0047] In some embodiments, the driving mechanism 22 includes a gear 221 disposed on a rotating shaft 222, a groove 11 is provided on the guide rail 1, a rack 12 is provided in the groove 11, the gear 221 is meshed and connected with the rack 12, and a driving member 223 for driving the connecting shaft to rotate is provided at the end of any connecting shaft facing away from the brush roller 226. In one embodiment, the driving member 223 is configured as a servo motor.

[0048] Because the gear 221 is meshed with the rack 12, the brush roller 226 rotates while the driving mechanism 22 as a whole moves horizontally above the guide rail 1, brushing the paint on the surface of the water-cooled wall tube row, effectively preventing the paint from flowing and causing uneven spraying thickness and resulting in poor spraying effect.

[0049] In order to further prevent the paint from flowing, in some embodiments, a resistance wire 227 is provided inside the brush roller 226. The resistance wire 227 is provided inside the brush roller 226, so that when the brush roller 226 brushes the surface of the water-cooled wall tube row, a certain amount of heat is transferred to the paint on the surface of the water-cooled wall tube row, thereby accelerating the solidification rate of the paint, further effectively preventing the paint from flowing, and thus improving the spraying effect.

[0050] In some embodiments, a fixing member 224 for supporting the driving member 223 is provided below the driving member 223, the fixing member 224 is configured to be L-shaped and the end of the fixing member 224 is bent toward the guide rail 1, a first slide groove 13 is provided on the side of the guide rail 1 away from the spraying machine body 21, and the fixing member 224 is slidably connected to the first slide groove 13 at one end toward the guide rail 1. The setting of the fixing member 224 can effectively support the driving member 223, and the sliding connection between the first slide groove 13 and the fixing member 224 can ensure that the fixing member 224 stably follows and supports the driving member 223 during movement.

[0051] In some embodiments, the spraying member 24 includes a material pipe 244 and an air pipe 246 arranged perpendicular to the guide rail 1. The air pipe 246 is arranged parallel to the front of the material pipe 244 along the spraying direction. A plurality of spray heads 245 are arranged vertically below the material pipe 244. A plurality of spray heads 247 are arranged vertically below the air pipe 246. The spraying machine body 21 is provided with a clearance hole 211 through which the air supply pipe 246 and the material pipe 244 pass.

[0052] The cooperation between the material pipe 244 and the plurality of spray heads 245 can supply the paint entering the material pipe 244 to each spray head 245, and each spray head 245 is arranged at equal intervals, so that the paint is more uniform during the spraying process, and the paint range can also cover the entire guide rail 1 range more stably;

[0053] The setting of the air pipe 246 and the air jet hole can effectively remove the grit, dust and loose rust on the water-cooled wall tube row, and remove the debris attached to the water-cooled wall tube row through the airflow, providing a smooth coating surface for the coating operation of the rear spray head 245, thereby making the coating process more uniform.

[0054] In some embodiments, the outlet direction of the jet head 247 is offset away from the material pipe 244. The offset jet head 247 can ensure that when the jet is used to remove debris, the blown debris will fly away from the spray body, thereby further reducing the possibility of debris appearing on the coating surface.

[0055] The material pipe 244 is connected to the air pipe 246 through a sleeve 241. A feed pipe 242 for feeding the material pipe 244 is vertically upwardly provided on the sleeve 241 at a position corresponding to the communication position with the material pipe 244. An air intake pipe 243 is parallel to the feed pipe 242 and in the same direction as the feed pipe 242 at a position corresponding to the position between the material pipe 244 and the air pipe 246 on the sleeve 241. The air intake pipe 243 and the feed pipe 242 are connected to an external air source and a feeding assembly.

[0056] The driven mechanism 23 includes a piston rod 234 inserted in a sleeve 241, and a material hole 236 corresponding to the material pipe 244 and the feed port is provided on the piston rod 234. The material hole 236 is in a three-way shape. A first one-way valve 248 is provided in the sleeve 241 at the position where the sleeve 241 and the air pipe 246 are connected. A second one-way valve 249 is provided in the air intake pipe 243, and a rubber sealing ring 235 is provided at the end of the piston rod 234 facing the air pipe 246.

[0057] The feed pipe 242 and the air inlet pipe 243 are separated by the piston rod 234, and the air inlet is connected to the sleeve 241. The gas can enter the sleeve along the air inlet pipe 243. When the piston rod 234 is compressed into the sleeve 241, under the action of the rubber sealing ring 235, the air pressure between the piston rod 234 and the first one-way valve 248 in the sleeve 241 increases, the first one-way valve 248 and the second one-way valve 249 are opened, and the air flow enters the sleeve 241 along the air inlet pipe 243 and enters the air pipe 246, thereby performing the jet removal operation.

[0058] When the piston rod 234 is compressed into the sleeve 241, the three-way material hole 236 will be connected with the feed pipe 242 and the material pipe 244, the paint enters the material hole 236 along the feed pipe 242, and is transported to the material pipe 244 through the two three-way outlets, thereby performing the paint operation.

[0059] In one embodiment, a sealing ring is provided at each opening of the three-way material hole 236, thereby preventing the paint from flowing out along the gap between the feed pipe 242 and the material hole 236, and the gap between the material hole 236 and the material pipe 244, thereby reducing the occurrence of paint flowing out and blocking the sleeve 241.

[0060] In some embodiments, the distance between the material hole 236 and the rubber sealing ring 235 is smaller than the distance between the air inlet pipe 243 and the feed pipe 242. The moving distance of the piston rod 234 is also smaller than the distance between the air inlet pipe 243 and the feed pipe 242, ensuring that the feed hole 236 can always maintain a connected state with the sleeve 241, avoiding the situation that the piston rod 234 blocks the air inlet pipe 243 and the gas cannot enter the air pipe 246.

[0061] The surface of the water-cooled wall tube row is sprayed. Since the spraying device 2 moves slowly horizontally as a whole during the spraying process, a rectangular area is sprayed on the surface of the water-cooled wall tube row. In this way, the sand is cleaned first and then sprayed, so that there will be no waste on the first spraying when the work starts. Because the head of the water-cooled wall tube row needs to be sanded, and the spraying operation is located behind the sand cleaning operation. If the operations are performed at the same time, it will cause the waste of paint in the stroke before the spraying operation moves to the top of the water-cooled wall tube row. The sand cleaning operation and the spraying operation are performed alternately, which avoids the waste of paint and reduces the cost.

[0062] In some embodiments, the driven component includes a telescopic member arranged perpendicular to one side of the piston rod 234, the telescopic distance of the telescopic member is smaller than the distance between the air intake pipe 243 and the feed pipe 242, and a U-shaped plate 231 is provided at the end of the telescopic member away from the piston rod 234. The U-shaped plate 231 includes a connecting part and a power part. The connecting part is fixedly connected to the piston rod 234 and is arranged parallel to the brush roller 226. The power part is vertically arranged at both ends of the connecting part. A rack 232 is provided on the power part facing the guide rail 1, and a semi-toothed disc 225 is provided on the connecting shaft to mesh with the rack 232. The power part is slidingly connected to the spray machine body 21. During the rotation process, the rotating shaft 222 also drives the semi-toothed disc 225 to rotate. During the rotation process, the semi-toothed disc 225 engages with the rack 232, thereby driving the U-shaped plate 231 to be compressed and moved into the interior of the spray machine body 21, compressing the telescopic part, so that the piston rod 234 moves into the sleeve 241 until the material hole 236 is aligned with the position of the feed pipe 242 and the material pipe 244, and the spraying operation can be carried out.

[0063] In some embodiments, the telescopic member includes a guide plate 238 group fixedly intercepted with the connecting portion, the guide plate 238 group includes two opposing guide plates 238, a sliding sleeve is provided on the outer portion of the guide plate 238 group, the piston rod 234 passes through the sliding sleeve and is slidingly connected to the sliding sleeve, the sliding sleeve is provided with a sliding hole for the guide plate 238 group to pass through, each guide plate 238 can pass through the sliding hole, and a first spring 239 is provided inside the sliding sleeve and between the connecting portion to enable the sliding sleeve to move along the length direction of the piston rod 234.

[0064] When the U-shaped plate 231 is compressed and moved toward the inside of the spray machine body 21 , due to the setting of the first spring 239 , the sliding sleeve can slide on the guide plate 238 group, that is, when the sliding sleeve abuts against the sleeve 241 , the U-shaped plate 231 can drive the piston rod 234 to be compressed and moved into the sleeve 241 .

[0065] When the U-shaped plate 231 drives the piston rod 234 to reset, the material hole 236 ends the correspondence with the feed pipe 242, and the spraying operation is stopped. At the same time, due to the gas pressure in the sleeve 241, the first one-way valve 248 is closed and the second one-way valve 249 is opened, and the air in the sleeve 241 is refilled, waiting for the next work.

[0066] In some embodiments, a fixing bar 215 is provided on the spray machine body 21 at a position corresponding to the power unit. The fixing bar 215 is arranged parallel to the guide rail 1. A second slide groove 214 is provided on the fixing bar 215. A T-shaped slider 233 is provided on the fixing unit to cooperate with the second slide groove 214. The T-shaped slider 233 includes an integrally arranged sliding block and a bearing block. The sliding block is inserted in the second slide groove 214, and the bearing block is arranged on the side of the second slide groove 214 away from the fixing unit, thereby supporting the fixing unit, that is, supporting the U-shaped plate 231.

[0067] In some embodiments, a fixing device is provided on one side of the 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 disposed between the first fixing plate 15 and the third fixing plate 14;

[0068] A second spring 16 is fixedly connected between the first fixing plate 15 and the second fixing plate 17;

[0069] A clamping gap is provided between the second fixing plate 17 and the third fixing plate 14 so as to clamp and fix the upper components of the water-cooled wall.

[0070] During fixed installation, the water-cooled wall tube row is first placed between the third fixing plate 14 and the second fixing plate 17. The second spring 16 exerts a reset thrust on the second fixing plate 17, so that the second fixing plate 17 and the third fixing plate 14 generate a stable clamping force on the water-cooled wall tube row, thereby achieving stable and rapid fixation.

[0071] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0072] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0073] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0074] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0075] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0076] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A water-cooled wall spraying device for a thermal power plant boiler, comprising two sets of guide rails, with a spraying device provided at the upper end of the guide rails, characterized in that: The spraying device comprises a spraying machine body, and a set of driving mechanisms are respectively arranged on the inner side of the spraying machine body corresponding to two sets of guide rails for rotation, so that the spraying machine body can move on the guide rails; A brush roller is fixedly arranged between the two groups of driving mechanisms, a clearance groove is arranged on the spraying machine body corresponding to the brush roller, and a rotating shaft is fixedly arranged on the brush roller toward the two groups of guide rails, and the rotating shaft is rotatably connected to the spraying machine body; A spraying part is fixedly installed inside the spraying machine body, and the spraying part is arranged in front of the brush roller along the spraying walking direction. A driven mechanism for controlling the spraying machine body to automatically spray is fixedly installed at one end of the spraying machine body.

2. A thermal power plant boiler water wall spraying device as claimed in claim 1, characterized in that: The spray machine body is symmetrically provided with a group of fixing ears on both sides corresponding to the two groups of guide rails. The fixing ears are extended toward the guide rails and are L-shaped. A rotating connection hole is provided on the fixing ear, and the rotating shaft is rotatably connected to the rotating connection hole.

3. A thermal power plant boiler water wall spraying device as claimed in claim 2, characterized in that: The driving mechanism includes a gear arranged on the rotating shaft, a groove is opened on the guide rail, a rack is arranged in the groove, the gear is meshingly connected with the rack, and any one of the connecting shafts is provided with a driving member for driving the connecting shaft to rotate at the end away from the brush roller.

4. A thermal power plant boiler water wall spraying device as claimed in claim 3, characterized in that: A fixing member for supporting the driving member is provided below the driving member, the fixing member is arranged in an L-shape and the end of the fixing member is bent toward the guide rail, a first slide groove is provided on the side of the guide rail away from the spraying machine body, and the fixing member is slidably connected to the first slide groove toward one end of the guide rail.

5. The water-cooled wall spraying device for a thermal power plant boiler according to claim 1, characterized in that: The spraying part comprises a material pipe and an air pipe arranged perpendicularly to the guide rail, the air pipe is arranged parallel to the front of the material pipe along the spraying direction, a plurality of groups of spray heads are arranged vertically below the material pipe, a plurality of groups of air jet heads are arranged vertically below the air pipe, and a through hole for the air pipe and the material pipe to pass through is arranged on the spraying machine body; The material pipe and the air pipe are connected via a sleeve, a feed pipe for feeding the material pipe is arranged vertically upward on the sleeve corresponding to the position connected with the material pipe, and an air inlet pipe is arranged on the sleeve corresponding to the position between the material pipe and the air pipe and parallel to the feed pipe in the same direction; The driven mechanism includes a piston rod inserted in the sleeve, the piston rod is provided with a material hole corresponding to the material pipe and the feed port, a first one-way valve is provided in the sleeve at the position where the sleeve and the air pipe are connected, a second one-way valve is provided in the air inlet pipe, and a rubber sealing ring is provided at one end of the piston rod facing the air pipe.

6. A thermal power plant boiler water wall spraying device as claimed in claim 5, characterized in that: The distance between the material hole and the rubber sealing ring is smaller than the distance between the air intake pipe and the feed pipe.

7. A thermal power plant boiler water wall spraying device as claimed in claim 5, characterized in that: The driven assembly includes a telescopic member arranged perpendicularly to one side of the piston rod, a U-shaped plate is provided at one end of the telescopic member away from the piston rod, the U-shaped plate includes a connecting portion and a power portion, the connecting portion is fixedly connected to the piston rod and arranged parallel to the brush roller, the power portion is vertically arranged at both ends of the connecting portion, a rack is provided on the power portion facing the guide rail, a semi-toothed disc is provided on the connecting shaft meshing with the rack, and the power portion is slidably connected to the spray machine body.

8. A thermal power plant boiler water wall spraying device as claimed in claim 7, characterized in that: A fixing bar is provided on the spraying machine body corresponding to the position of the power part, a second slide groove is provided on the fixing bar, and a T-shaped sliding block is provided on the fixing part to match the second slide groove.

9. A thermal power plant boiler water wall spraying device as claimed in claim 7, characterized in that: The telescopic member includes a guide plate group fixedly intercepted with the connecting portion, a sliding sleeve is provided on the outside of the guide plate group, the piston rod passes through the sliding sleeve and is slidingly connected with the sliding sleeve, a sliding hole is provided on the sliding sleeve for the guide plate group to pass through, and a first spring is provided inside the sliding sleeve and between the connecting portion to enable the sliding sleeve to move along the length direction of the piston rod.

10. A thermal power plant boiler water wall spraying device as claimed in claim 5, characterized in that: The outlet direction of the air jet head is offset and arranged away from the material pipe.

11. A thermal power plant boiler water wall spraying device as claimed in claim 1, characterized in that: A fixing device is provided on one side of the two groups 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 arranged between the first fixing plate and the third fixing plate; A second spring is 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 upper components of the water-cooled wall.

12. A thermal power plant boiler water wall spraying device as claimed in claim 1, characterized in that: The spraying machine body is provided with a support leg at the position corresponding to the two sets of guide rails at one end away from the driven device, and each support leg is provided with a supporting sliding block slidably connected to the guide rail at one end facing the guide rail.

13. A thermal power plant boiler water wall spraying device as claimed in claim 1, characterized in that: A resistance wire is arranged inside the brush roller.

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