Narrow slit spraying device for urban planning and construction of steel structure

Abstract

The invention relates to a narrow slit spraying device for urban planning and construction of a steel structure, which is applied to the field of spraying equipment and comprises a spraying machine, a high-pressure hose and a spray gun fixed and communicated with the other end of the high-pressure hose, the output end of the spray gun is fixed and communicated with an extension arm pipe, the extension arm pipe is an L-shaped bent pipe, and the bent part of the extension arm pipe is located at the end far away from the spray gun; the end, away from the spray gun, of the extension arm pipe is fixedly communicated with a flow dividing disc, a plurality of discharging pipes evenly distributed along the circumferential side of the flow dividing disc are fixed to the circumferential side of the flow dividing disc, and nozzles are fixedly communicated to part of the discharging pipes. The steel structure narrow slit spraying device is high in spraying efficiency and good in uniformity, so that a good spraying effect is achieved, and the defects that an existing steel structure narrow slit spraying device cannot flexibly stretch into a narrow slit, multiple inner surfaces of the narrow slit cannot be synchronously sprayed, the spraying efficiency is low, and the uniformity is poor are overcome.

Description

Technical Field

[0001] This invention relates to a steel structure spraying device, and more particularly to a narrow-slot spraying device for urban planning and construction steel structures applied in the field of spraying equipment. Background Technology

[0002] Urban planning is a comprehensive deployment and specific arrangement made to achieve the city's economic and social development goals within a certain period, determine the city's nature, scale and development direction, make rational use of urban land, and coordinate the city's spatial layout and various construction projects. In the process of modern urban planning and construction, steel structure buildings have become a popular choice due to their higher strength, better earthquake resistance, and the fact that components can be manufactured in factories and installed on-site, thus significantly reducing construction time. Furthermore, the reusability of steel greatly reduces construction waste, making it more environmentally friendly. Steel structure buildings are structures with load-bearing structures made of steel. They typically consist of beams, columns, trusses, and other components made of steel profiles and plates, which, together with the roof, floors, and walls, form the overall building structure.

[0003] In the field of steel structure construction, to prevent steel corrosion and extend its service life, its surface must be coated with anti-corrosion paint. However, steel structure components often form many box-shaped structures or are connected by stiffening plates to form very narrow gaps (the gap width is usually less than 150mm, or even only wide enough for one person's arm to pass through). These narrow spaces have poor air circulation and are prone to moisture accumulation, making them high-risk areas for corrosion. Therefore, the anti-corrosion coating on their inner walls is crucial.

[0004] According to the search, there are already spraying devices for narrow gaps in the existing technology. For example, the patent document with the publication number "CN223145007U" discloses a rust prevention spraying structure for steel structure gaps. However, this structure can only target the gaps on the surface of the steel structure and cannot reach into the narrow gaps of the steel structure to perform the operation. For example, the patent document with announcement number "CN222112187U" discloses a steel structure spraying device with a narrow slit spraying structure. It can only spray one surface in a single operation. Multiple spraying is required for the multiple inner surfaces of the narrow slit, resulting in low spraying efficiency. Furthermore, spraying multiple inner surfaces separately can easily lead to overspraying or underspraying, resulting in poor performance.

[0005] Therefore, existing narrow-slot spraying devices for steel structures still have drawbacks such as being unable to flexibly extend into the narrow slot, being unable to spray multiple inner surfaces of the narrow slot simultaneously, having low spraying efficiency, and poor uniformity. Summary of the Invention

[0006] The technical problem that this invention aims to solve in view of the above-mentioned prior art is that existing steel structure narrow slot spraying devices cannot flexibly extend into the narrow slot, cannot simultaneously spray multiple inner surfaces of the narrow slot, and have low spraying efficiency and poor uniformity.

[0007] To solve the above problems, the present invention provides a narrow-slot spraying device for steel structures in urban planning and construction, including a spraying machine, a main high-pressure hose fixed to the output end of the spraying machine, and a spray gun fixed to and connected to the other end of the main high-pressure hose. The output end of the spray gun is fixed to and connected to an extension arm tube, which is an L-shaped bend, and the bend of the extension arm tube is located at the end away from the spray gun. The end of the extension arm tube away from the spray gun is fixed and connected to a flow divider. Multiple discharge tubes are fixed around the flow divider and evenly distributed around the flow divider. Some discharge tubes are fixed and connected to nozzles, and other discharge tubes are detachably connected to sealing caps, which seal the discharge tubes. There are multiple nozzles, each corresponding to one of the multiple inner walls of the narrow slit.

[0008] In the aforementioned narrow-slot spraying device for steel structures in urban planning and construction, improvements are made to the existing spray gun structure. An extension arm is installed at the front end of the existing spray gun. Through the extension arm, the distributor plate and nozzles can be extended into the narrow slot. The spraying parameters, quantity, and corresponding installation positions of the nozzles can be adjusted in advance, thereby enabling simultaneous spraying of multiple inner walls of the narrow slot in the steel structure. This ensures that each nozzle can cover its corresponding inner wall, completing the internal spraying operation of the narrow slot in one go. The spraying efficiency is high, the uniformity is good, and the spraying effect is excellent. This solves the shortcomings of existing narrow-slot spraying devices for steel structures, such as the inability to flexibly extend into the narrow slot, the inability to simultaneously spray multiple inner surfaces of the narrow slot, and the low spraying efficiency and poor uniformity.

[0009] As a further supplement to this application, a secondary high-pressure hose is fixed and connected to the discharge pipe, and the nozzle is adjustablely connected to and connected to the discharge pipe through the secondary high-pressure hose; Multiple fixed-distance supports can be detachably installed on the periphery of the distributor plate. Each fixed-distance support corresponds to a different nozzle. The end of each fixed-distance support away from the distributor plate is in contact with the inner wall of the narrow slit. The connection between each fixed-distance support and the nozzle of each auxiliary high-pressure hose can be detachably fixed.

[0010] As a further supplement to this application, the extension arm tube and the spray gun, the flow divider and the extension arm tube, the nozzle and the secondary high-pressure hose, and the secondary high-pressure hose and the flow divider are all detachably connected by connectors.

[0011] As a further supplement to this application, the fixed-distance support body includes a telescopic support rod, a relief bracket, a roller, a connecting ring, and a compression spring. One end of the telescopic support rod is threadedly connected to the diverter plate. The relief bracket is fixed to the end of the movable rod of the telescopic support rod away from the diverter plate. The relief bracket is an L-shaped rod. The crossbar connected to the relief bracket and the telescopic support rod extends to the side away from the nozzle. The roller is rotatably connected to the end of the relief bracket away from the diverter plate and rolls against the inner wall of the narrow slit. The connecting ring is fixed to the other end of the relief bracket. The connecting ring is sleeved at the connection between the auxiliary high-pressure hose and the nozzle. The compression spring is movably sleeved on the outside of the movable rod of the telescopic support rod. The two ends of the compression spring are respectively fixed to the fixed rod of the telescopic support rod and the relief bracket. The distributor plate has an internal threaded groove on its periphery. The end of the telescopic support rod away from the relief bracket is integrally formed with a bolt post that is compatible with the internal threaded groove. A fastening screw is screwed through the connecting ring, and one end of the fastening screw is pressed against the connection between the auxiliary high-pressure hose and the nozzle.

[0012] As a further supplement to this application, hose connector one and hose connector two are fixed at both ends of the secondary high-pressure hose, and connectors are rotatably installed on both the nozzle and hose connector one. Hose connector one is screwed to the discharge pipe through the connector, and the nozzle is screwed to hose connector two through the connector. A connecting ring is sleeved on hose connector two.

[0013] As a further supplement to this application, the extension arm tube includes a long arm tube, a bend joint and a connecting sleeve, with a connector rotatably mounted at one end of the long arm tube, and the long arm tube is screwed to the output end of the spray gun through the connector. The elbow joint is an L-shaped elbow. The connecting sleeve is fitted on the outside of the end of the long arm pipe away from the spray gun and the end of the elbow joint near the long arm pipe. The connecting sleeve is threaded to both the long arm pipe and the elbow joint.

[0014] As a further supplement to this application, the end of the long arm tube away from the spray gun is formed with a threaded part one, and both ends of the bend joint are formed with threaded parts two. The inner side of the connecting sleeve is formed with an internal threaded hole that matches the threaded parts one and two. A limiting spacer is integrally formed on the inner side of the connecting sleeve. The two sides of the limiting spacer are respectively abutted against the end of the long arm tube and the end of the bend joint.

[0015] As a further supplement to this application, the diverter is a hollow disc with a feed pipe fixed and connected to one side. The feed pipe is connected to multiple discharge pipes through the internal cavity of the diverter. The feed pipe is also rotatably connected to a connector, and the discharge pipe is fixed and connected to the end of the elbow joint away from the long arm pipe through the threaded engagement of the connector and the threaded part two.

[0016] As a further supplement to this application, a first sealing ring is fixedly sleeved on the periphery of the feed pipe and abuts against the inner wall of the connector, and a second sealing ring is movably embedded in the side wall of the feed pipe and is interference-fitted with the end of the bend connector. The nozzle, hose connector, and end of the long arm tube are also equipped with the same sealing elements as the first and second sealing rings.

[0017] As a further supplement to this application, the connector includes an internally threaded cap covering the end of the feed pipe, a sealed bearing fixed to the inner side of the internally threaded cap, the inner side of the sealed bearing being fixed to the periphery of the feed pipe, the internally threaded cap being rotatably connected to the feed pipe through the sealed bearing, and the outer side of the first sealing ring abutting against the inner wall of the internally threaded cap.

[0018] In summary, when spraying narrow joints in steel structures used for urban planning and construction, the paint is first pumped out by a spraying machine and sent into the spray gun through the main high-pressure hose. After passing through the extension arm at the front of the spray gun, it enters the distribution plate and is then sprayed out from multiple nozzles, simultaneously spraying the inner walls of multiple narrow joints. The user holds the spray gun and moves it gradually along the length of the narrow joint, which drives the extension arm, distribution plate, and nozzles to move synchronously, achieving simultaneous spraying of multiple surfaces inside the narrow joint in one go. This results in high spraying efficiency and good uniformity, thus achieving excellent spraying results. It solves the shortcomings of existing narrow joint spraying devices for steel structures, such as the inability to flexibly extend into the narrow joint, the inability to simultaneously spray multiple inner surfaces of the narrow joint, and low spraying efficiency and poor uniformity. Furthermore, when the spray gun rotates so that the axis of the distribution plate extends in the same direction as the length of the narrow steel structure slit, multiple rollers roll and abut against multiple inner walls of the narrow steel structure slit, thereby causing the relief bracket to be compressed by the spring. This, in turn, drives the nozzle away from the inner wall of the narrow steel structure slit through the connecting ring. Since the distance between the rollers, the relief bracket, and the connecting ring is fixed, the distance between the nozzle and the inner wall of the narrow steel structure slit is also fixed. This ensures that the nozzle and the inner wall of the narrow steel structure slit form the optimal spraying distance, achieving a good spraying effect. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present application; Figure 2 This is a schematic diagram of the spray gun, extension arm, flow divider, and nozzle structure of this application; Figure 3 This is a schematic diagram of the extension arm tube, flow divider, nozzle, connector, auxiliary high-pressure hose, and fixed-distance support structure of this application; Figure 4 This is a schematic diagram of the flow divider, nozzle, connector, secondary high-pressure hose, and fixed-distance support body from another perspective of the present application. Figure 5This is a schematic diagram of the distribution plate and connecting parts structure of this application; Figure 6 This is a side sectional view of the distribution plate in this application; Figure 7 This is a schematic diagram of the fixed-distance support structure of this application; Figure 8 This is a schematic diagram showing the disassembled structure of the nozzle, connector, and secondary high-pressure hose of this application; Figure 9 This is a schematic diagram of the disassembled structure of the extension arm tube in this application.

[0020] Explanation of the labels in the diagram: 1. Sprayer; 2. Main high-pressure hose; 3. Spray gun; 4. Extension arm; 41. Long arm; 411. Threaded part one; 42. Bend joint; 421. Threaded part two; 43. Connecting sleeve; 431. Limiting spacer ring; 5. Diverter plate; 51. Feed pipe; 511. First sealing ring; 512. Second sealing ring; 52. Discharge pipe; 53. Internal thread groove; 54. Sealing cap; 6. Nozzle; 7. Connector; 71. Internal thread cap; 72. Sealed bearing; 8. Secondary high-pressure hose; 81. Hose connector one; 82. Hose connector two; 9. Spacing support; 91. Telescopic support rod; 92. Clearance bracket; 93. Roller; 94. Connecting ring; 95. Compression spring. Detailed Implementation

[0021] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0022] This invention provides a narrow-slot spraying device for steel structures used in urban planning and construction. Please refer to [link / reference]. Figures 1-9 The system includes a sprayer 1, a main high-pressure hose 2 fixed to the output end of the sprayer 1, and a spray gun 3 fixed to and connected to the other end of the main high-pressure hose 2. The sprayer 1, the main high-pressure hose 2, and the spray gun 3 are all existing technologies. For example, the sprayer 1 adopts a high-pressure airless sprayer in the prior art, which is composed of a motor power system, a plunger pump, a pressure controller, a filter, etc. Its specific structure, spatial layout, connection relationship, and working principle are well known to those skilled in the art and will not be described in detail here. The output end of the spray gun 3 is fixed and connected to an extension arm tube 4. The extension arm tube 4 is an L-shaped bend, and the bend of the extension arm tube 4 is located at the end away from the spray gun 3. One end of the extension arm tube 4 away from the spray gun 3 is fixed and connected to a flow divider 5. Multiple discharge tubes 52 are fixed around the flow divider 5 and evenly distributed around the flow divider 5. Threads are formed on the outer wall of the discharge tubes 52. A nozzle 6 is fixed and connected to a part of the discharge tubes 52. A sealing cap 54 is detachably connected to another part of the discharge tubes 52. An internal thread that matches the thread of the discharge tube 52 is formed on the inner side of the sealing cap 54. The sealing cap 54 seals the discharge tube 52. There are multiple nozzles 6, each corresponding to one of the multiple inner walls of the narrow slit.

[0023] Based on the above structure, when spraying narrow steel structure seams used for urban planning and construction, the paint is first pumped out by the spraying machine 1 and sent into the spray gun 3 through the main high-pressure hose 2. (With the spray gun open) After passing through the extension arm tube 4 at the front end of the spray gun 3, it enters the distribution plate 5 and is then sprayed out from multiple nozzles 6, simultaneously spraying the inner walls of multiple narrow seams. At this time, the user holds the spray gun 3 and moves it gradually along the length of the narrow steel structure seam, which drives the extension arm tube 4, distribution plate 5, nozzles 6, etc. to move synchronously, realizing the simultaneous spraying operation of multiple surfaces inside the narrow steel structure seam, which is completed in one go. The spraying efficiency is high and the uniformity is good, thus achieving a good spraying effect. This solves the shortcomings of existing narrow steel structure seam spraying devices, such as the inability to flexibly extend into the narrow seam, the inability to simultaneously spray multiple inner surfaces of the narrow seam, and the low spraying efficiency and poor uniformity.

[0024] It should be noted that when inserting the front end of the extension arm tube 4, the flow divider 5, and the nozzle 6 into the narrow gap of the steel structure, the flow divider 5 should first be rotated so that its own axis extension direction is consistent with the length and width direction of the narrow gap of the steel structure. Then, the front end of the extension arm tube 4, the flow divider 5, and the nozzle 6 should be inserted into the narrow gap of the steel structure. After that, the spray gun 3 should be rotated to drive the extension arm tube 4, the flow divider 5, and the nozzle 6 to rotate 90°, so that the axis extension direction of the flow divider 5 is consistent with the length direction of the narrow gap of the steel structure. At this time, the linear spraying range of the nozzle 6 coincides with the width range of the inner wall of the narrow gap of the steel structure, thereby ensuring that multiple nozzles 6 can achieve a uniform coverage spraying effect during the moving spraying process. In addition, nozzle 6 also uses the adjustable nozzle commonly used in existing technology, such as Graco RAC nozzle (high pressure airless nozzle, self-cleaning). Different models can produce different spraying ranges (linear width ranges) and spraying thicknesses. Before use, multiple nozzles 6 need to be selected and adjusted to adjust the spraying parameters of multiple nozzles 6 to adapt to the spraying needs of multiple different inner surfaces of narrow gaps in steel structures.

[0025] Furthermore, a secondary high-pressure hose 8 is fixed and connected to the discharge pipe 52, and the nozzle 6 is adjustablely connected to and connected to the discharge pipe 52 through the secondary high-pressure hose 8; Multiple fixed-distance support bodies 9 can also be detachably installed on the periphery of the diverter plate 5. Each fixed-distance support body 9 corresponds to a multiple nozzle 6. The end of the multiple fixed-distance support body 9 away from the diverter plate 5 is in movable contact with the inner wall of the narrow slit. The connection between the multiple fixed-distance support body 9 and the multiple auxiliary high-pressure hoses 8 and the nozzles 6 can be detachably fixed. The extension arm tube 4 and the spray gun 3, the flow divider 5 and the extension arm tube 4, the nozzle 6 and the auxiliary high-pressure hose 8, and the auxiliary high-pressure hose 8 and the flow divider 5 are all detachably connected by connectors 7.

[0026] By setting up the auxiliary high-pressure hose 8 and the fixed-distance support body 9, multiple nozzles 6 can maintain an appropriate distance from the multiple inner walls of the narrow slit of the steel structure, thereby ensuring the effectiveness of the spraying and achieving the best spraying effect.

[0027] Furthermore, the fixed-distance support body 9 includes a telescopic support rod 91, a clearance bracket 92, a roller 93, a connecting ring 94, and a compression spring 95. One end of the telescopic support rod 91 is threadedly connected to the diverter plate 5. The clearance bracket 92 is fixed to the end of the movable rod of the telescopic support rod 91 away from the diverter plate 5. The clearance bracket 92 is an L-shaped rod. The crossbar connected to the clearance bracket 92 and the telescopic support rod 91 extends to the side away from the nozzle 6. The roller 93 is rotatably connected to the end of the clearance bracket 92 away from the diverter plate 5 and rolls against the inner wall of the narrow slit. The connecting ring 94 is fixed to the other end of the relief bracket 92. The connecting ring 94 is sleeved at the connection between the auxiliary high pressure hose 8 and the nozzle 6. The compression spring 95 is movably sleeved on the outside of the movable rod of the telescopic support rod 91. The two ends of the compression spring 95 are respectively fixed to the fixed rod of the telescopic support rod 91 and the relief bracket 92. The circumference of the distributor plate 5 has an internal threaded groove 53. The end of the telescopic support rod 91 that is away from the relief bracket 92 has an integrally formed bolt post that is screwed into the internal threaded groove 53. A fastening screw is screwed through the connecting ring 94. One end of the fastening screw is pressed against the connection between the auxiliary high pressure hose 8 and the nozzle 6.

[0028] During use, when the spray gun 3 rotates so that the axis of the distribution plate 5 extends in the same direction as the length of the narrow steel structure slit, multiple rollers 93 roll and abut against multiple inner walls of the narrow steel structure slit, thereby causing the relief bracket 92 to compress the spring 95 and, through the connecting ring 94, drive the nozzle 6 away from the inner wall of the narrow steel structure slit. Since the distance between the rollers 93, the relief bracket 92, and the connecting ring 94 is fixed, the distance between the nozzle 6 and the inner wall of the narrow steel structure slit is also fixed, thus ensuring that the nozzle 6 and the inner wall of the narrow steel structure slit form the optimal spraying distance and achieve a good spraying effect.

[0029] Furthermore, hose connector 1 81 and hose connector 2 82 are fixed at both ends of the secondary high-pressure hose 8, and connector 7 is rotatably installed on both nozzle 6 and hose connector 1 81. Hose connector 1 81 is screwed to discharge pipe 52 through connector 7, and nozzle 6 is screwed to hose connector 2 82 through connector 7. Connecting ring 94 is sleeved on hose connector 2 82. The nozzle 6 can be adjusted to connect to the distributor plate 5 via the connector 7, the secondary high-pressure hose 8 (utilizing the flexible deformation properties of the secondary high-pressure hose 8), thereby enabling the nozzle 6 to meet the movement requirements and maintain the optimal distance from the inner wall of the narrow slot in the steel structure.

[0030] Furthermore, the extension arm tube 4 includes a long arm tube 41, a bend joint 42, and a connecting sleeve 43. A connector 7 is rotatably installed at one end of the long arm tube 41, and the long arm tube 41 is screwed and fixed to the output end of the spray gun 3 through the connector 7. The elbow joint 42 is an L-shaped elbow. The connecting sleeve 43 is sleeved on the end of the long arm pipe 41 away from the spray gun 3 and the end of the elbow joint 42 close to the long arm pipe 41. The connecting sleeve 43 is threadedly connected to the long arm pipe 41 and the elbow joint 42. The end of the long arm tube 41 away from the spray gun 3 has a threaded part 411, and both ends of the bent pipe joint 42 have threaded parts 421. The inner side of the connecting sleeve 43 has an internal threaded hole that matches the threaded part 411 and the threaded part 421. The inner side of the connecting sleeve 43 is integrally formed with a limiting ring 431, and the two sides of the limiting ring 431 abut against the end of the long arm tube 41 and the end of the bent pipe joint 42, respectively.

[0031] By setting up the long arm tube 41, the bend joint 42 and the connecting sleeve 43, the long arm tube 41, the bend joint 42 and the connecting sleeve 43 can be connected in sequence to form an extension arm tube 4 with an L-shaped front end, which makes it easy to send the diverter plate 5, the nozzle 6 and the fixed-distance support body 9 into the narrow gap of the steel structure, making it flexible and convenient to use.

[0032] Furthermore, the diverter plate 5 is a hollow disc. A feed pipe 51 is fixed and connected to one side of the diverter plate 5. The feed pipe 51 is connected to multiple discharge pipes 52 through the internal cavity of the diverter plate 5. A connector 7 is also rotatably connected to the feed pipe 51. The discharge pipe 52 is fixed and connected to the end of the elbow joint 42 away from the long arm pipe 41 through the threaded engagement of the connector 7 and the threaded part 421. Among them, the feed pipe 51 is fixedly sleeved around the periphery with a first sealing ring 511 that abuts against the inner wall of the connector 7, and the feed pipe 51 is movably embedded in the side wall of the feed pipe 51 with a second sealing ring 512 that is interference-fitted with the end of the bent pipe connector 42. Nozzle 6, hose connector 81, and the end of long arm tube 41 are also provided with the same sealing elements (such as sealing rings, sealing gaskets, etc.) as the first sealing ring 511 and the second sealing ring 512. Taking the connector 7 connected to the feed pipe 51 as an example (other connectors 7 have the same structure and are adapted to other components respectively, other components refer to the aforementioned nozzle 6, hose connector 81, long arm pipe 41, etc.): the connector 7 includes an internal thread cap 71 covering the end of the feed pipe 51, and a sealing bearing 72 whose outer side is fixed to the inner side of the internal thread cap 71. The inner side of the sealing bearing 72 is fixed to the periphery of the feed pipe 51. The internal thread cap 71 is sealed and rotatably connected to the feed pipe 51 through the sealing bearing 72. The outer side of the first sealing ring 511 abuts against the inner wall of the internal thread cap 71.

[0033] By utilizing the connector 7, the extension arm tube 4, the diverter plate 5, the secondary high-pressure hose 8, the nozzle 6 and other structures can be flexibly assembled and disassembled, which facilitates the maintenance and replacement of this part, and makes it easier to maintain and clean damaged or hardened parts after long-term use, making it more convenient to use. Furthermore, by installing auxiliary high-pressure hoses 8, nozzles 6, and spaced support bodies 9 on different discharge pipes 52 and corresponding internal threaded grooves 53, spraying operations can be performed on the inner walls of narrow slits of different rigid structures (referring to different quantities or angles), achieving a more flexible spraying effect.

[0034] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this invention.

Claims

1. A narrow-slot spraying device for steel structures in urban planning and construction, comprising a spraying machine (1), a main high-pressure hose (2) fixed to the output end of the spraying machine (1), and a spray gun (3) fixed to and connected to the other end of the main high-pressure hose (2), characterized in that: The output end of the spray gun (3) is fixed and connected to an extension arm tube (4). The extension arm tube (4) is an L-shaped bend, and the bend of the extension arm tube (4) is located at the end away from the spray gun (3). The end of the extension arm tube (4) away from the spray gun (3) is fixed and connected to a flow divider plate (5). Multiple discharge pipes (52) are fixed on the periphery of the flow divider plate (5) and evenly distributed along the periphery of the flow divider plate (5). A nozzle (6) is fixed and connected to a portion of the discharge pipes (52), and a sealing cap (54) is detachably connected to another portion of the discharge pipes (52). The sealing cap (54) seals the discharge pipes (52). The nozzle (6) is provided in multiple parts and corresponds one-to-one with the multiple inner walls of the narrow slit.

2. The narrow-slot spraying device for steel structures in urban planning and construction according to claim 1, characterized in that: The discharge pipe (52) is fixed and connected to a secondary high-pressure hose (8), and the nozzle (6) is adjustablely connected to the discharge pipe (52) through the secondary high-pressure hose (8). Multiple fixed-distance support bodies (9) can be detachably installed on the periphery of the diverter plate (5). Each of the multiple fixed-distance support bodies (9) corresponds to one of the multiple nozzles (6). The end of each of the multiple fixed-distance support bodies (9) away from the diverter plate (5) is in movable contact with the inner wall of the narrow slit. The connection between each of the multiple fixed-distance support bodies (9) and the multiple auxiliary high-pressure hoses (8) and the nozzles (6) can be detachably fixed.

3. The narrow-slot spraying device for steel structures in urban planning and construction according to claim 2, characterized in that: The extension arm tube (4) and the spray gun (3), the diverter plate (5) and the extension arm tube (4), the nozzle (6) and the auxiliary high-pressure hose (8), and the auxiliary high-pressure hose (8) and the diverter plate (5) are all detachably connected by connectors (7).

4. The narrow-slot spraying device for steel structures in urban planning and construction according to claim 3, characterized in that: The fixed-distance support body (9) includes a telescopic support rod (91), a relief bracket (92), a roller (93), a connecting ring (94), and a compression spring (95). One end of the telescopic support rod (91) is threadedly connected to the diverter plate (5). The relief bracket (92) is fixed to the end of the movable rod of the telescopic support rod (91) away from the diverter plate (5). The relief bracket (92) is an L-shaped rod. The crossbar connecting the relief bracket (92) and the telescopic support rod (91) extends to the side away from the nozzle (6). The roller (93) is rotatably connected to the end of the relief bracket (92) away from the diverter plate (5) and rolls against the inner wall of the narrow slit. The connecting ring (94) is fixed to the other end of the relief bracket (92). The connecting ring (94) is sleeved at the connection between the auxiliary high pressure hose (8) and the nozzle (6). The compression spring (95) is movably sleeved on the outside of the movable rod of the telescopic support rod (91). The two ends of the compression spring (95) are respectively fixed to the fixed rod of the telescopic support rod (91) and the relief bracket (92). The diverter plate (5) has an internal thread groove (53) on its periphery. The end of the fixed rod of the telescopic support rod (91) away from the relief bracket (92) is integrally formed with a bolt post that is screwed into the internal thread groove (53). A fastening screw is screwed through the connecting ring (94). One end of the fastening screw is abutted against the connection between the auxiliary high pressure hose (8) and the nozzle (6).

5. The narrow-slot spraying device for steel structures in urban planning and construction according to claim 4, characterized in that: The two ends of the secondary high-pressure hose (8) are respectively fixed with hose connector one (81) and hose connector two (82). Connectors (7) are rotatably installed on both the nozzle (6) and hose connector one (81). Hose connector one (81) is screwed to the discharge pipe (52) through connector (7). The nozzle (6) is screwed to hose connector two (82) through connector (7). The connecting ring (94) is sleeved on hose connector two (82).

6. The narrow-slot spraying device for steel structures in urban planning and construction according to claim 5, characterized in that: The extension arm tube (4) includes a long arm tube (41), a bend joint (42) and a connecting sleeve (43). A connector (7) is rotatably installed at one end of the long arm tube (41). The long arm tube (41) is screwed to the output end of the spray gun (3) through the connector (7). The elbow joint (42) is an L-shaped elbow. The connecting sleeve (43) is sleeved on the end of the long arm pipe (41) away from the spray gun (3) and the outside of the elbow joint (42) near the end of the long arm pipe (41). The connecting sleeve (43) is threadedly connected to the long arm pipe (41) and the elbow joint (42).

7. The narrow-slot spraying device for steel structures in urban planning and construction according to claim 6, characterized in that: The long arm tube (41) has a threaded part 1 (411) at the end away from the spray gun (3), and the two ends of the bent pipe joint (42) have threaded parts 2 (421). The inner side of the connecting sleeve (43) has an internal threaded hole that matches the threaded part 1 (411) and the threaded part 2 (421). The inner side of the connecting sleeve (43) is integrally formed with a limiting spacer ring (431). The two sides of the limiting spacer ring (431) abut against the end of the long arm tube (41) and the end of the bent pipe joint (42), respectively.

8. The narrow-slot spraying device for steel structures in urban planning and construction according to claim 6, characterized in that: The diversion plate (5) is a hollow disc. A feed pipe (51) is fixed and connected to one side of the diversion plate (5). The feed pipe (51) is connected to multiple discharge pipes (52) through the internal cavity of the diversion plate (5). The feed pipe (51) is also rotatably connected to a connector (7), and the discharge pipe (52) is fixed and connected to the end of the bent pipe joint (42) away from the long arm pipe (41) through the threaded engagement of the connector (7) and the threaded part (421).

9. The narrow-slot spraying device for steel structures in urban planning and construction according to claim 8, characterized in that: The feed pipe (51) is fixedly sleeved around its periphery with a first sealing ring (511) that abuts against the inner wall of the connector (7), and the feed pipe (51) is movably embedded with a second sealing ring (512) that is interference fit with the end of the bent pipe connector (42). The nozzle (6), hose connector 1 (81), and long arm tube (41) are also provided with the same sealing elements as the first sealing ring (511) and the second sealing ring (512).

10. The narrow-slot spraying device for steel structures in urban planning and construction according to claim 9, characterized in that: The connector (7) includes an internal thread cap (71) covering the end of the feed pipe (51) and a sealed bearing (72) whose outer side is fixed to the inner side of the internal thread cap (71). The inner side of the sealed bearing (72) is fixed to the periphery of the feed pipe (51). The internal thread cap (71) is rotatably connected to the feed pipe (51) through the sealed bearing (72). The outer side of the first sealing ring (511) abuts against the inner wall of the internal thread cap (71).

Images