Fabricated steel structure surface paint coating spraying equipment

Abstract

The invention discloses spraying equipment for a paint coating on the surface of an assembly type steel structure. The spraying equipment comprises a conveying mechanism, a transferring mechanism, a clamping and rotating mechanism and a spraying mechanism. A first baffle is arranged at one end of the conveying mechanism, and the conveying mechanism conveys a steel structure workpiece to the side portion of the first baffle; the transfer mechanism is arranged on one side of the conveying mechanism; a push plate of the conveying mechanism pushes the steel structure workpiece to the transfer mechanism; the clamping and rotating mechanism is arranged above the transferring mechanism; the transferring mechanism transfers the steel structure workpiece to the clamping and rotating mechanism; the spraying mechanism comprises an upper half cylinder and a lower half cylinder which surround the steel structure workpiece after being closed, and spraying heads used for paint spraying are arranged in the upper half cylinder and the lower half cylinder correspondingly. And the lower half cylinder is communicated with a water outlet pipe. According to the equipment, automatic spraying can be achieved, the spraying efficiency is improved, waste generated in the spraying process can be effectively recycled, and resource waste is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of production and manufacturing of steel structure accessories, and in particular relates to a paint coating spraying device on the surface of an assembled steel structure. Background Art

[0002] As a modern construction method, prefabricated buildings have been widely used around the world in recent years. Prefabricated buildings transfer a large number of on-site operations in traditional buildings to factories, reducing on-site construction time and environmental pollution, and improving construction efficiency. Prefabricated steel structures, in particular, have been widely used in construction projects due to their advantages such as corrosion resistance, heat insulation, fire resistance and temperature resistance. However, steel structures need to be surface treated during the production process to enhance their corrosion resistance and durability, and the spraying of surface paint coatings is an indispensable part of this.

[0003] Among the existing spraying technologies, handheld spray devices are a common choice. The advantages of handheld spray devices are that they are simple, flexible, and have low equipment costs. However, this spraying method has obvious shortcomings. First, since the operator needs to hold the spray gun for a long time, the spraying process is prone to operator fatigue, and the spray material during the spraying process may have a certain impact on the operator's health. Secondly, handheld spraying is inefficient, especially in the spraying of large-area steel structures. Manual operation is not only time-consuming, but also difficult to maintain consistent spraying quality. In addition, the waste generated during the spraying process is difficult to recycle, resulting in waste of resources and increased environmental pollution. Summary of the invention

[0004] The purpose of the present invention is to provide a paint coating spraying device for the surface of an assembled steel structure to solve the problems that manual spraying may affect the operator's body, the spraying time is long, the spray material is not easy to recover, and the resource and labor costs are high.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: an assembled steel structure surface paint coating spraying equipment, which includes: a conveying mechanism, a transfer mechanism, a clamping and rotating mechanism and a spraying mechanism; a first baffle is provided at one end of the conveying mechanism, and the conveying mechanism transports the steel structure workpiece to the side of the first baffle; the transfer mechanism is arranged on one side of the conveying mechanism; the push plate of the conveying mechanism pushes the steel structure workpiece to the transfer mechanism; the clamping and rotating mechanism is arranged above the transfer mechanism; the transfer mechanism transfers the steel structure workpiece to the clamping and rotating mechanism; the spraying mechanism includes an upper half cylinder and a lower half cylinder surrounding the steel structure workpiece after closing, and nozzles for paint spraying are provided in the upper half cylinder and the lower half cylinder; the upper half cylinder is connected to the water supply pipe, and the lower half cylinder is connected to the water outlet pipe.

[0006] The assembled steel structure surface paint coating spraying equipment of the present invention as described above, further, the conveying mechanism includes a conveyor belt, a push plate and a first telescopic cylinder, the first baffle is arranged at one end of the conveyor belt; the push plate is connected to the first telescopic cylinder; when the first telescopic cylinder is extended, the push plate pushes the steel structure workpiece to the transfer mechanism.

[0007] The paint coating spraying equipment for the surface of assembled steel structure of the present invention as described above, further, the conveying mechanism also includes a second baffle, and the second baffle is respectively arranged on both sides of the conveyor belt.

[0008] The present invention as described above is an assembled steel structure surface paint coating spraying equipment, further, the transfer mechanism includes two parallel and spaced guide rails, side placing blocks are slidably installed on the guide rails, the side placing blocks are provided with a first placing groove, a second telescopic cylinder is installed at one end of the guide rail, the output end of the second telescopic cylinder is connected to the side placing block, a transfer frame is placed in the first placing groove of the side placing block, the transfer frame has openings at both ends, and the openings of the transfer frame correspond to the push plate position of the conveying mechanism; a third telescopic cylinder is arranged at the lower position between the two guide rails, a middle placing block is installed at the output end of the third telescopic cylinder, and the middle placing block is provided with a second placing groove; the steel structure workpiece located in the transfer frame is moved to above the middle placing block by the second telescopic cylinder.

[0009] The present invention provides the assembled steel structure surface paint coating spraying equipment as described above, further, the side placement blocks are magnetically attracted to the transfer rack, and the middle placement blocks are magnetically attracted to the transfer rack. Such a design can play a positioning auxiliary effect.

[0010] The assembled steel structure surface paint coating spraying equipment of the present invention as described above, further, the clamping and rotating mechanism includes a chuck, a motor and a fourth telescopic cylinder, the output shaft of the motor and the output end of the fourth telescopic cylinder are both equipped with chucks, and the chuck is rotatably connected to the output end of the fourth telescopic cylinder; the third telescopic cylinder moves the steel structure workpiece located in the transfer frame to between the two chucks, and the chuck clamps the steel structure workpiece when the fourth telescopic cylinder is extended.

[0011] The assembled steel structure surface paint coating spraying device of the present invention is further provided that the chuck is rotatably connected to the output end of the fourth telescopic cylinder via a damping bearing. With such a design, after the motor rotates completely, the chuck at the output end of the fourth telescopic cylinder will not rotate, which is beneficial for the next alignment clamping.

[0012] The present invention is an assembled steel structure surface paint coating spraying equipment as described above, further, the spraying mechanism includes a fifth telescopic cylinder, a mounting plate, a sixth telescopic cylinder, an upper half cylinder and a lower half cylinder; the output end of the fifth telescopic cylinder is connected to the mounting plate, the sixth telescopic cylinder is installed on the mounting plate, the sixth telescopic cylinder drives the upper half cylinder and the lower half cylinder to close or open; arc tubes are installed inside the upper half cylinder and the lower half cylinder, the arc tubes are connected to the supply pipe, and a nozzle for paint spraying is installed on the arc tube; a water supply pipe is installed on the side of the upper half cylinder, and a water outlet pipe is installed on the side of the lower half cylinder.

[0013] The assembled steel structure surface paint coating spraying equipment of the present invention as described above, further, a set of sixth telescopic cylinders is installed on the mounting plate, and the sixth telescopic cylinders are connected to one side of the upper half cylinder or the lower half cylinder.

[0014] The assembled steel structure surface paint coating spraying equipment of the present invention as described above, further, two groups of sixth telescopic cylinders facing opposite directions are installed on the mounting plate, one group of sixth telescopic cylinders is connected to the upper half cylinder, and the other group of sixth telescopic cylinders is connected to the lower half cylinder.

[0015] The beneficial effects of the present invention are as follows: the paint coating spraying equipment for the surface of assembled steel structures of the present invention can not only realize automatic spraying and improve spraying efficiency, but also effectively recycle waste generated during the spraying process and reduce resource waste. Through assembly line operation and precise control, the spraying quality is more stable and uniform, reducing manual intervention and improving production efficiency and quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or other advantages of the present invention will become clearer and easier to understand through the detailed description made in conjunction with the following drawings, which are only exemplary and do not limit the present invention, wherein: Figure 1 It is a schematic diagram of the conveyor belt of the steel structure in the spraying equipment; Figure 2 It is a schematic diagram of the transfer mechanism of the steel structure in the spraying equipment; Figure 3 It is a schematic diagram of the clamping mechanism of the steel structure in the spraying equipment; Figure 4 It is a schematic diagram showing that the steel structure is located between the upper and lower cylinders of the spraying equipment; Figure 5 This is a schematic diagram of the steel structure being sprayed; Figure 6 It is a cross-sectional schematic diagram of the steel structure when the upper half and lower half of the spraying equipment are closed; Figure 7 It is a schematic diagram of the layout of the mounting plate and a set of sixth telescopic cylinders; Figure 8It is a schematic diagram of the layout of the mounting plate and two sets of sixth telescopic cylinders.

[0017] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Conveying mechanism, 11. Conveyor belt, 12. First baffle, 13. Push plate, 14. First telescopic cylinder, 15. Second baffle, 2. Transfer mechanism, 21. Guide rail, 22. Side placement block, 23. First placement slot, 24. Second telescopic cylinder, 25. Transfer rack, 26. Third telescopic cylinder, 27. Middle placement block, 28. Second placement slot, 3. Clamping and rotating mechanism, 31. Motor, 32. Fourth telescopic cylinder, 33. Chuck, 4. Spraying mechanism, 41. Fifth telescopic cylinder, 42. Sixth telescopic cylinder, 43. Upper half cylinder, 44. Lower half cylinder, 45. Avoidance hole, 46. Arc tube, 47. Supply pipe, 48. Feed pipe, 49. Nozzle, 410. Water supply pipe, 411. Water outlet pipe, 412. Mounting plate, 5. Steel structure workpiece. DETAILED DESCRIPTION

[0018] Hereinafter, embodiments of the paint coating spraying equipment for the surface of a prefabricated steel structure of the present invention will be described with reference to the accompanying drawings.

[0019] The embodiments described herein are specific embodiments of the present invention, which are used to illustrate the concept of the present invention, are illustrative and exemplary, and should not be construed as limiting the embodiments of the present invention and the scope of the present invention. In addition to the embodiments described herein, those skilled in the art can also adopt other obvious technical solutions based on the claims and the contents disclosed in the specification of this application, including technical solutions that adopt any obvious replacement and modification of the embodiments described herein.

[0020] The drawings of this specification are schematic diagrams, which assist in explaining the concept of the present invention and schematically show the shapes of various parts and their mutual relationships. Please note that in order to clearly show the structures of various components of the embodiments of the present invention, the drawings are not drawn according to the same scale. The same reference numerals are used to represent the same parts.

[0021] The following combination Figures 1 to 6 The present invention is directed to an assembled steel structure surface paint coating spraying device according to an embodiment of the present invention, which includes: The conveying mechanism 1 is provided with a first baffle 12 at one end of the conveying mechanism 1, and the conveying mechanism 1 transports the steel structure workpiece 5 to the side of the first baffle 12; in one embodiment, the conveying mechanism 1 includes a conveyor belt 11, a push plate 13 and a first telescopic cylinder 14, and the first baffle 12 is arranged at one end of the conveyor belt 11; the push plate 13 is connected to the first telescopic cylinder 14; when the first telescopic cylinder 14 is extended, the push plate 13 pushes the steel structure workpiece 5 to the transfer mechanism 2.

[0022] In a further preferred embodiment, the conveying mechanism 1 further includes a second baffle 15, which is respectively arranged on both sides of the conveyor belt 11. Such a design can guide the steel structure to accurately contact the baffle 12. In fact, other auxiliary blocking structural measures can also be considered according to specific circumstances, such as a plurality of blocking rods spaced along both sides of the conveyor belt.

[0023] The transfer mechanism 2 is arranged on one side of the conveying mechanism 1; the push plate 13 of the conveying mechanism 1 pushes the steel structure workpiece 5 to the transfer mechanism 2; In one embodiment, the transfer mechanism 2 includes two parallel guide rails 21 spaced apart from each other, a side placement block 22 is slidably mounted on the guide rails 21, the side placement block 22 is provided with a first placement slot 23, a second telescopic cylinder 24 is mounted at one end of the guide rail 21, the output end of the second telescopic cylinder 24 is connected to the side placement block 22, a transfer rack 25 is placed in the first placement slot 23 of the side placement block 22, the transfer rack 25 has openings at both ends, and the openings of the transfer rack 25 correspond to the position of the push plate 13 of the conveying mechanism 1; a third telescopic cylinder 26 is arranged at the lower position between the two guide rails 21, a middle placement block 27 is mounted at the output end of the third telescopic cylinder 26, and the middle placement block 27 is provided with a second placement slot 28; the steel structure workpiece 5 located in the transfer rack 25 is moved to above the middle placement block 27 by the second telescopic cylinder 24. In the example Figure 5 In the illustrated embodiment, the transfer rack 25 is U-shaped, and the first placement slot 23 and the second placement slot 28 have the same specifications, so that the transfer rack can be adaptively placed in the first placement slot 23 and the second placement slot 28 during the workpiece transfer process. In a preferred embodiment, the first placement slot 23 and the second placement slot 28 both have flat bottom surfaces, and the bottom surface at the upper end of the slot is a closing structure with a gradually reduced size. With such a design, the closing structure serves to guide the transfer rack, and the flat bottom surface can serve the purpose of stably placing the transfer rack 25. The combination of the two can serve the purpose of self-positioning of the transfer rack 25. In a further preferred embodiment, the side placement block 22 and the transfer rack 25 are magnetically attracted to each other, and the middle placement block 27 and the transfer rack 25 are magnetically attracted to each other. Such a design can serve as an auxiliary positioning effect. In a preferred embodiment, as Figure 2 As shown, the second telescopic cylinder 24 is a double-axis telescopic cylinder, and the two output shafts of the second telescopic cylinder 24 are respectively connected to a side placement block 22. This design ensures the synchronous movement effect of the two side placement blocks 22, and can also achieve the effect of stably placing the transfer rack. By setting the two ends of the transfer rack 25 as an open structure, the transfer mechanism 2 can be adapted to the conveying mechanism 1, and the push plate 13 of the conveying mechanism is used to push the steel structure workpiece 5 to the transfer rack 25 of the transfer mechanism 2 (such as Figure 2 Further, when the steel structure workpiece 5 returns to the position corresponding to the push plate 13 after the paint spraying is completed, the push plate can further push the steel structure workpiece away from the transfer rack (such as Figure 2 The middle transfer rack is pushed out obliquely to the right end), that is to say, the conveying mechanism 1, the transfer mechanism 2 and the clamping and rotating mechanism 3 cooperate with each other during the transfer process of the steel structure workpiece 5, and jointly complete the movement process of the steel structure workpiece 5.

[0024] The clamping and rotating mechanism 3 is arranged above the transport mechanism 2; the transport mechanism 2 transports the steel structure workpiece 5 to the clamping and rotating mechanism 3; in one embodiment, the clamping and rotating mechanism 3 includes a chuck 33, a motor 31 and a fourth telescopic cylinder 32, the output shaft of the motor 31 and the output end of the fourth telescopic cylinder 32 are both equipped with a chuck 33, and the chuck 33 is rotatably connected to the output end of the fourth telescopic cylinder 32; the third telescopic cylinder 26 moves the steel structure workpiece 5 located in the transport frame 25 to between the two chucks 33, and the chuck 33 clamps the steel structure workpiece 5 when the fourth telescopic cylinder 32 is extended. It can be understood by those skilled in the art that the transport mechanism and the clamping and rotating mechanism are separated by a set distance, such as 10 cm to 50 cm. By setting the spacing distance, the spraying mechanism 4 can be moved and the upper and lower cylinders can be used to surround the steel structure workpiece and spray paint.

[0025] In a further preferred embodiment, the chuck 33 is rotatably connected to the output end of the fourth telescopic cylinder 32 via a damping bearing. With such a design, after the motor 31 has completed its rotation, the chuck 33 at the output end of the fourth telescopic cylinder 32 will not rotate, which is beneficial for the next alignment clamping.

[0026] The spraying mechanism 4 includes an upper half cylinder 43 and a lower half cylinder 44 which surround the steel structure workpiece 5 after closing. The upper half cylinder 43 and the lower half cylinder 44 are both provided with a spray head 49 for spraying paint. The upper half cylinder 43 is connected to a water supply pipe 410, and the lower half cylinder 44 is connected to a water outlet pipe 411. Figure 3 , Figure 4 and Figure 5 As shown, the upper half cylinder 43 and the lower half cylinder 44 are both semi-cylindrical shell structures, and a avoidance hole 45 is set at the center axis position. When the upper half cylinder and the lower half cylinder are closed through the avoidance hole, the steel structure workpiece is located inside the cylinder, and the fourth telescopic cylinder and the motor are located outside the cylinder. In this way, the steel structure workpiece that needs to be sprayed with paint can be sprayed and rotated inside the cylinder. Preferably, a flexible baffle is installed at the position of the avoidance hole 45. Such a design can prevent the paint from overflowing without affecting the rotation of the motor 31.

[0027] In one embodiment, the spraying mechanism 4 includes a fifth telescopic cylinder 41, a mounting plate 412, a sixth telescopic cylinder 42, an upper half cylinder 43 and a lower half cylinder 44; the output end of the fifth telescopic cylinder 41 is connected to the mounting plate 412, the sixth telescopic cylinder 42 is mounted on the mounting plate 412, and the sixth telescopic cylinder 42 drives the upper half cylinder 43 and the lower half cylinder 44 to close or open; an arc tube 46 is installed inside the upper half cylinder 43 and the lower half cylinder 44, the arc tube 46 is connected to the supply pipe 47, the part of the supply pipe extending out of the cylinder is connected to the feed pipe 48, and paint and other coatings are transported through the feed pipe. In a preferred embodiment, the arc tube 46 is a semicircular tube; a nozzle 49 for paint spraying is installed on the arc tube 46; a water supply pipe 410 is installed on the side of the upper half cylinder 43, and a water outlet pipe 411 is installed on the side of the lower half cylinder 44. In order to fully flush and clean the upper half cylinder and the lower half cylinder, the water supply pipe and the water outlet pipe are respectively arranged at two opposite ends, that is, the water supply pipe and the water outlet pipe are arranged at the far ends of the upper half cylinder and the lower half cylinder.

[0028] In a preferred embodiment, a set of sixth telescopic cylinders 42 are mounted on the mounting plate 412, and the sixth telescopic cylinders 42 are connected to one of the upper half cylinder 43 or the lower half cylinder 44. Figure 7 As shown, a sixth telescopic cylinder 42 is mounted on the mounting plate 412, and the sixth telescopic cylinder 42 is connected to the upper half cylinder 43. In this embodiment, the lower half cylinder is fixed, and only the upper half cylinder needs to be moved in time to open or close the cylinder body composed of the upper half cylinder and the lower half cylinder. At this time, it is necessary to avoid interference between the steel structure workpiece and the lower half cylinder when the steel structure workpiece moves toward the lower half cylinder. In another specific embodiment, as shown in FIG. Figure 8 As shown, two groups of sixth telescopic cylinders 42 facing opposite directions are installed on the mounting plate 412, one group of the sixth telescopic cylinders 42 is connected to the upper half cylinder 43, and the other group of the sixth telescopic cylinders 42 is connected to the lower half cylinder 44. In the present invention, the telescopic cylinder can be a hydraulic cylinder, a pneumatic cylinder, etc., or an electric telescopic cylinder (i.e., an electric push rod).

[0029] When using an assembled steel structure surface paint coating spraying device, the steel structure workpiece 5 moves on the conveyor belt 11. When the steel structure workpiece 5 contacts the first baffle plate 12, under the conveying force of the continuously running conveyor belt 11, the side of the steel structure workpiece 5 contacts and is blocked by the first baffle plate 12, thereby achieving the purpose of self-positioning; the first telescopic cylinder 14 operates to drive the push plate 13 to move, and the push plate 13 pushes the steel structure workpiece 5 toward the transfer rack 25. After the steel structure workpiece 5 is completely pushed into the transfer rack 25, the first telescopic cylinder 14 drives the push plate 13 to retreat to wait for the next push; The second telescopic cylinder 24 operates to drive the side placement block 22 to move directly above the middle placement block 27, thereby driving the transfer rack 25 (and the steel structure workpiece) placed on the side placement block 22 to move together. When the transfer rack 25 moves to the top of the middle placement block 27, the second telescopic cylinder 24 stops operating, and the third telescopic cylinder 26 operates to drive the middle placement block 27 to move upward, so that the transfer rack 25 located in the first placement slot 23 is forced to enter the second placement slot 28 and is driven by the middle placement block 27 to move upward. When the transfer rack 25 moves between the clamps of the clamping rotation mechanism 3, the third telescopic cylinder 26 stops; The fourth telescopic cylinder 32 is running, and the push clamp 33 moves toward the steel structure workpiece 5 in the transfer frame 25. After the clamp 33 at the end of the fourth telescopic cylinder 32 contacts and matches with the steel structure workpiece 5, the steel structure workpiece 5 is driven to move in the transfer frame 25 until the other end of the steel structure workpiece 5 forms a clamping fit with the clamp 33 at the output end of the motor 31. It should be noted that the clamp 33 can be replaced so as to form a fit with steel structure workpieces 5 of different specifications and models. After the steel structure workpiece 5 is clamped and fixed by the clamps 33 at both ends, the third telescopic cylinder 26 retracts, driving the transfer frame 25 to move downward to its original position. The fifth telescopic cylinder 41 operates, driving the mounting plate and the sixth telescopic cylinder 42 to move forward until the upper half cylinder 43 and the lower half cylinder 44 are located at the upper and lower sides of the steel structure workpiece 5. The sixth telescopic cylinder 42 operates, and the upper half cylinder 43 and the lower half cylinder 44 are engaged with each other. With the cooperation of the avoidance hole 45, the steel structure workpiece 5 is enclosed inside by the upper half cylinder 43 and the lower half cylinder 44. At this time, by supplying paint and other spraying materials into the supply pipe 47, the spraying materials will be filled between the upper half cylinder 43 and the lower half cylinder 44 in the form of mist from the nozzle 49 on the arc tube 46. At the same time, the motor 31 rotates, driving the steel structure workpiece 5 between the clamps 33 to rotate, so as to achieve the purpose of evenly spraying the spraying materials on the steel structure workpiece 5. After the steel structure workpiece 5 is sprayed, the sixth telescopic cylinder 42 is operated, the upper half cylinder 43 and the lower half cylinder 44 are opened, the transfer rack 25 returns to the lower side of the steel structure workpiece 5, the chuck 33 releases the steel structure workpiece 5, and the steel structure workpiece 5 falls on the transfer rack 25, and then continues to be transported back until the transfer rack 25 returns the steel structure workpiece 5 to the side of the conveyor belt 11, and then the first telescopic cylinder 14 is operated to drive the push plate 13 to push the sprayed steel structure workpiece 5 away from the transfer rack 25, and proceed to the next workpiece processing step; When the above-mentioned workpiece transfer action does not interfere with the closing of the upper half cylinder 43 and the lower half cylinder 44, the upper half cylinder 43 and the lower half cylinder 44 are closed again, and flushing liquid is input into the water supply pipe 410, so that the residual spray material in the upper half cylinder 43 and the lower half cylinder 44 can be flushed down and taken out from the water outlet pipe 411, and the subsequent spray material can be reused by re-adjusting the concentration.

[0030] The technical features disclosed above are not limited to the disclosed combinations with other features. Those skilled in the art may also make other combinations between the technical features according to the purpose of the invention to achieve the purpose of the invention.

Claims

1. A paint coating spraying device for the surface of an assembled steel structure, characterized in that: include: A conveying mechanism (1), a transfer mechanism (2), a clamping and rotating mechanism (3) and a spraying mechanism (4); a first baffle (12) is provided at one end of the conveying mechanism (1), and the conveying mechanism (1) transports the steel structure workpiece (5) to the side of the first baffle (12); the transfer mechanism (2) is arranged on one side of the conveying mechanism (1); a push plate (13) of the conveying mechanism (1) pushes the steel structure workpiece (5) to the transfer mechanism (2); the clamping and rotating mechanism (3) is arranged Above the transfer mechanism (2); the transfer mechanism (2) transfers the steel structure workpiece (5) to the clamping and rotating mechanism (3); the spraying mechanism (4) comprises an upper half cylinder (43) and a lower half cylinder (44) which surround the steel structure workpiece (5) after closing, and a nozzle (49) for spraying paint is provided in each of the upper half cylinder (43) and the lower half cylinder (44); the upper half cylinder (43) is connected to a water supply pipe (410), and the lower half cylinder (44) is connected to a water outlet pipe (411).

2. The paint coating spraying equipment for the surface of assembled steel structure according to claim 1 is characterized in that: The conveying mechanism (1) comprises a conveying belt (11), a push plate (13) and a first telescopic cylinder (14); the first baffle (12) is arranged at one end of the conveying belt (11); the push plate (13) is connected to the first telescopic cylinder (14); when the first telescopic cylinder (14) is extended, the push plate (13) pushes the steel structure workpiece (5) to the transfer mechanism (2).

3. The paint coating spraying equipment for the surface of assembled steel structure according to claim 2 is characterized in that: The conveying mechanism (1) further comprises a second baffle (15), wherein the second baffle (15) is respectively arranged on both sides of the conveying belt (11).

4. The paint coating spraying equipment for the surface of assembled steel structure according to claim 3 is characterized in that: The transfer mechanism (2) comprises two parallel guide rails (21) arranged at intervals, a side placement block (22) is slidably mounted on the guide rails (21), the side placement block (22) is provided with a first placement groove (23), a second telescopic cylinder (24) is mounted on one end of the guide rail (21), the output end of the second telescopic cylinder (24) is connected to the side placement block (22), a transfer frame (25) is placed in the first placement groove (23) of the side placement block (22), the transfer frame (25) has openings at both ends, and the openings of the transfer frame (25) correspond to the position of the push plate (13) of the conveying mechanism (1); a third telescopic cylinder (26) is arranged at a lower position between the two guide rails (21), a middle placement block (27) is mounted on the output end of the third telescopic cylinder (26), and the middle placement block (27) is provided with a second placement groove (28); the steel structure workpiece (5) located in the transfer frame (25) is moved to the top of the middle placement block (27) by the second telescopic cylinder (24).

5. The paint coating spraying equipment for the surface of assembled steel structure according to claim 4 is characterized in that: The side placement block (22) and the transfer rack (25) are magnetically attracted to each other, and the middle placement block (27) and the transfer rack (25) are magnetically attracted to each other.

6. The paint coating spraying equipment for the surface of assembled steel structure according to claim 4 or 5, characterized in that: The clamping and rotating mechanism (3) comprises a chuck (33), a motor (31) and a fourth telescopic cylinder (32); the output shaft of the motor (31) and the output end of the fourth telescopic cylinder (32) are both equipped with a chuck (33); the chuck (33) and the output end of the fourth telescopic cylinder (32) are rotatably connected; the third telescopic cylinder (26) moves the steel structure workpiece (5) located in the transfer frame (25) between the two chucks (33); and when the fourth telescopic cylinder (32) is extended, the chuck (33) clamps the steel structure workpiece (5).

7. The paint coating spraying equipment for the surface of assembled steel structure according to claim 6 is characterized in that: The clamping head (33) is rotationally connected to the output end of the fourth telescopic cylinder (32) via a damping bearing.

8. The paint coating spraying equipment for the surface of assembled steel structure according to claim 6 is characterized in that: The spraying mechanism (4) comprises a fifth telescopic cylinder (41), a mounting plate (412), a sixth telescopic cylinder (42), an upper half cylinder (43) and a lower half cylinder (44); the output end of the fifth telescopic cylinder (41) is connected to the mounting plate (412), the sixth telescopic cylinder (42) is mounted on the mounting plate (412), and the sixth telescopic cylinder (42) drives the upper half cylinder (43) and the lower half cylinder (44) to close or open; an arc tube (46) is mounted inside the upper half cylinder (43) and the lower half cylinder (44), the arc tube (46) is connected to a supply pipe (47), and a nozzle (49) for paint spraying is mounted on the arc tube (46); a water supply pipe (410) is mounted on the side of the upper half cylinder (43), and a water outlet pipe (411) is mounted on the side of the lower half cylinder (44).

9. The paint coating spraying equipment for the surface of assembled steel structure according to claim 8 is characterized in that: A set of sixth telescopic cylinders (42) is installed on the mounting plate (412), and the sixth telescopic cylinders (42) are connected to one of the upper half cylinder (43) or the lower half cylinder (44).

10. The paint coating spraying equipment for the surface of assembled steel structure according to claim 8, characterized in that: Two groups of sixth telescopic cylinders (42) facing opposite directions are installed on the mounting plate (412), one group of the sixth telescopic cylinders (42) is connected to the upper half cylinder (43), and the other group of the sixth telescopic cylinders (42) is connected to the lower half cylinder (44).

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