Steel pipe paint spraying box

Abstract

The utility model relates to a steel pipe paint spraying box, and belongs to the technical field of coating equipment, the steel pipe paint spraying box comprises a box body, two opposite side walls of the box body are respectively provided with a pipe inlet and a pipe outlet; a plurality of spray gun sets are arranged on the inner wall of the box body in the moving direction of the steel pipe from the pipe inlet to the pipe outlet, and each spray gun set comprises a first spray gun arranged under the steel pipe and four second spray guns evenly distributed in the circumferential direction of the steel pipe. The included angle between the orientation of one of the second spray guns and the orientation of the first spray gun is 45 degrees. The steel pipe surface spraying device has the effect of improving the spraying uniformity of the surface of the steel pipe.

Description

Technical Field

[0001] The present application relates to the technical field of coating equipment, and in particular to a steel pipe spray paint box. Background Art

[0002] Steel pipes are susceptible to oxidation corrosion during production, storage and transportation, so they need to be coated with a layer of paint to prevent oxidation reactions. The paint film on the surface of the steel pipe can isolate the contact of air and moisture, making the surface of the steel pipe less susceptible to oxidation and corrosion, thereby extending the service life of the steel pipe.

[0003] The existing painting box for steel pipes includes a box body, avoidance openings are opened on opposite sides of the box body, and spray guns are arranged on the inner walls of opposite sides of the box body. When spraying paint on the steel pipe, the steel pipe is extended into the box body from the avoidance opening, and the spray guns on both sides spray paint toward the surface of the steel pipe to make the paint adhere to the outside of the steel pipe. Then the steel pipe is moved out of the box body from the avoidance opening on the other side of the box body until the spraying of the entire steel pipe is completed.

[0004] With regard to the above-mentioned related technologies, when spraying the steel pipe with spray guns on both sides, it is not easy to spray the upper surface and the lower surface of the steel pipe positively, so there is a defect of low uniformity of spraying on the surface of the steel pipe. Utility Model Content

[0005] In order to improve the uniformity of spraying on the surface of a steel pipe, the present application provides a steel pipe spray paint box.

[0006] The steel pipe spray paint box provided in this application adopts the following technical solution:

[0007] A steel pipe spray paint box comprises a box body, wherein two opposite side walls of the box body are respectively provided with a pipe inlet and a pipe outlet; along the moving direction of the steel pipe from the pipe inlet to the pipe outlet, a plurality of spray gun groups are arranged on the inner wall of the box body, each spray gun group comprises a first spray gun arranged directly below the steel pipe, and four second spray guns uniformly distributed around the circumference of the steel pipe, and the angle between the direction of each of the second spray guns and the direction of the first spray gun is 45°.

[0008] By adopting the above technical solution, the steel pipe enters into the box from the pipe inlet, and the first spray gun and the second spray gun spray paint onto the steel pipe. At the same time, the position distribution of the first spray gun and the four second spray guns effectively improves the uniformity of spraying on the surface of the steel pipe.

[0009] Optionally, a first rotating roller is fixedly provided at the pipe inlet of the box body, a supporting assembly for supporting the first rotating roller is provided at the first rotating roller of the box body, a motor is provided on one side of the first rotating roller, the motor and the box body are fixedly connected, and an output shaft of the motor is fixedly connected to one end of the first rotating roller.

[0010] By adopting the above technical solution, one end of the steel pipe is placed on the first rotating roller, and the motor is started. The motor drives the first rotating roller to rotate. The friction between the first rotating roller and the steel pipe is used. After the steel pipe is sprayed with paint, the steel pipe is moved out of the box from the pipe outlet. There is no need for the staff to manually push the steel pipe into the box, thereby reducing the work intensity of the staff.

[0011] Optionally, the box body is fixedly connected with a first fixed plate at the pipe inlet, the first fixed plate is horizontally arranged, the supporting assembly includes a first supporting plate and a second supporting plate, one side of the first supporting plate and the second supporting plate are fixedly connected to the upper surface of the first fixed plate, the first supporting plate and the second supporting plate are parallel, the first supporting plate and the first fixed plate are perpendicular, the first rotating roller is rotatably connected between the first supporting plate and the second supporting plate, the length direction of the first rotating roller is perpendicular to the moving direction of the steel pipe, a plurality of first auxiliary rollers are arranged above the first fixed plate, the plurality of first auxiliary rollers are rotatably connected between the first supporting plate and the second supporting plate, the plurality of first auxiliary rollers are arranged in sequence along the length direction of the first fixed plate, the first auxiliary roller and the first rotating roller are in the same horizontal plane, a first sprocket is arranged on the output shaft of the motor, the output shaft of the motor passes through the first sprocket and is fixedly connected to the first sprocket, an end of the first auxiliary roller close to the first support plate passes through the first support plate, one end of the first auxiliary roller is fixedly connected to the second sprocket, and a chain is provided on the outer sleeves of the first sprocket and the second sprocket.

[0012] By adopting the above technical solution, the first fixed plate provides support for the first support plate and the second support plate, the first support plate and the second support plate support the first rotating roller, and at the same time realizes the connection between the first rotating roller and the box body, the motor drives the first sprocket to rotate, the first sprocket drives the chain to rotate, the chain drives the second sprocket to rotate, the second sprocket drives the first auxiliary roller to rotate, and the first auxiliary roller drives the steel pipe to move toward the box body, providing power for the steel pipe to move into the box body.

[0013] Optionally, guide plates are provided on opposite sides of the first support plate and the second support plate, the guide plates are parallel to the first support plate, telescopic rods and springs are fixedly provided between the guide plates and the first support plates of adjacent first support plates and between the guide plates and the second support plates of adjacent second support plates, the springs are sleeved outside the telescopic rods, and third support plates are fixedly connected at upper and lower ends of opposite sides of the guide plates on both sides, the third support plate is parallel to the first fixed plate, and a second auxiliary roller is rotatably connected between the upper and lower third support plates, and the second auxiliary roller is parallel to the guide plate.

[0014] By adopting the above technical solution, the telescopic rod is composed of a plurality of rod bodies which are sleeved and connected with each other in a sliding manner. The guide plates are moved in directions away from each other. The springs are compressed under the guidance of the telescopic rod. After the steel pipe is placed on the first auxiliary roller, the steel pipe is between the two guide plates. The guide plates on both sides are loosened, and the springs release their elastic force. Under the guidance of the telescopic rod, the guide plates are pushed to move. The guide plates on both sides push the second auxiliary roller to move. The second auxiliary roller limits the steel pipe, so that the steel pipe is not easy to move randomly on the first auxiliary roller during the movement.

[0015] The transmission gear of the present invention is a gear selected from the group consisting of a first gear and a second gear selected from the group consisting of a first gear and a second gear selected from the group consisting of a first gear and a second gear selected from the group consisting of a first gear and a second gear selected from the group consisting of a first gear and a second gear selected from the group consisting of a first gear and a second gear selected from the group consisting of a first gear and a second gear selected from the group consisting of a first gear and a second gear selected from the group consisting of a first gear and a second gear selected from the group consisting of a

[0016] By adopting the above technical solution, during the movement of the guide plate, the connecting rod and the second transmission rod are driven to move, the connecting rod drives the sleeve to move, and the second transmission rod drives the second bevel gear to move, so that the first bevel gear and the second bevel gear are always in a meshing state. At the same time, the chain drives the third sprocket to rotate, the third sprocket drives the first transmission rod to rotate, the third transmission rod drives the sleeve to rotate, the sleeve drives the first bevel gear to rotate, the first bevel gear drives the second bevel gear to rotate, the second bevel gear drives the second transmission rod to rotate, and the second transmission rod drives the second auxiliary roller to rotate. During the rotation of the second auxiliary roller, the steel pipe is driven to move toward the box body, thereby providing power for the movement of the steel pipe.

[0017] Optionally, the box body is fixedly connected to a second fixed plate at the pipe outlet, the second fixed plate is horizontally arranged, fourth support plates are fixedly connected to opposite sides of the upper surface of the second fixed plate, a second rotating roller is rotatably connected between the fourth support plates on both sides, and the second rotating roller is parallel to the first rotating roller and is in the same horizontal plane.

[0018] By adopting the above technical solution, when the steel pipe moves outward from the pipe outlet, the steel pipe is on the second rotating roller and drives the second rotating roller to rotate. The setting of the second rotating roller reduces the friction between the steel pipe and the box body, providing convenience for the movement of the steel pipe.

[0019] Optionally, the upper end of the box is open, a first protective cover is bolted to the upper end of the box, an air outlet pipe is fixedly connected to the top of the first protective cover, a second protective cover is arranged below the second protective cover, the second protective cover is a mesh structure, and the second protective cover is bolted to the upper end of the box.

[0020] By adopting the above technical solution, the gas in the box is moved out of the box through the outlet pipe, so that the air pressure in the box can be kept stable. At the same time, the second protective cover blocks external impurities, making it difficult for external impurities to fall onto the steel pipe being sprayed, reducing the impact on the spraying effect of the steel pipe.

[0021] Optionally, a side wall of the box body is provided with an inspection port, a closed door is hingedly connected to the box body at the inspection port, and a paint outlet is provided on the bottom wall of the box body.

[0022] By adopting the above technical solution, when the internal spray gun is damaged, the closed door is opened and the internal spray gun is inspected from the inspection port. The setting of the inspection port provides convenience for inspecting the spray gun. At the same time, the paint falling to the bottom of the box is moved to the outside of the box along the paint outlet and collected for reuse.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The first rotating roller is driven by the motor to rotate, and the first rotating roller drives the steel pipe to move at a uniform speed toward the box body, so that the staff does not need to manually push the steel pipe into the box body, thereby reducing the labor intensity of the staff;

[0025] 2. The motor drives the first sprocket to rotate, the first sprocket drives the first chain to rotate, the first chain drives the second sprocket to rotate, the first sprocket drives the first auxiliary roller to rotate, and the first auxiliary roller drives the steel pipe to move into the box body, thereby increasing the power of the steel pipe moving into the box body;

[0026] 3. The steel pipe is clamped and guided by the guide plates on both sides, so that the steel pipe is not easy to move randomly on the first auxiliary roller and the first rotating roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural schematic diagram of a steel pipe spray paint box according to an embodiment of the present application;

[0028] Figure 2 It is a schematic diagram of the structure of the support assembly in the embodiment of the present application;

[0029] Figure 3 This is a cross-sectional view of the structure of the first transmission rod in the embodiment of the present application;

[0030] Figure 4 This is a cross-sectional view of the structure inside the box in the embodiment of the present application;

[0031] Figure 5 It is a structural cross-sectional view showing the positions of the first spray gun and the second spray gun in the embodiment of the present application.

[0032] In the figure, 1, box body; 11, pipe inlet; 12, pipe outlet; 13, spray gun group; 131, first spray gun; 132, second spray gun; 14, support leg; 2, first rotating roller; 21, motor; 3, support assembly; 31, first support plate; 32, second support plate; 4, first fixed plate; 41, first auxiliary roller; 42, first sprocket; 43, second sprocket; 44, chain; 45, guide plate; 46, telescopic rod; 47, spring; 48, third Support plate; 49, second auxiliary roller; 5, first transmission rod; 51, third sprocket; 52, sleeve; 53, slide groove; 54, slider; 55, first bevel gear; 56, swivel; 57, connecting rod; 58, second transmission rod; 59, second bevel gear; 7, second fixed plate; 71, fourth support plate; 72, second rotating roller; 8, first protective cover; 81, second protective cover; 82, air outlet; 9, inspection port; 91, closed door; 92, paint outlet. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-Figure 5 This application is described in further detail.

[0034] The embodiment of the present application discloses a steel pipe spray paint box.

[0035] refer to Figure 1 A steel pipe paint spray box includes a box body 1, a first protective cover 8 is bolted to the upper end of the box body 1, an air outlet pipe 82 is fixedly connected to the upper end of the first protective cover 8, a pipe inlet 11 is opened on one side of the box body 1, a first fixing plate 4 is fixedly connected to the pipe inlet 11 of the box body 1, the first fixing plate 4 is horizontally arranged, a support leg 14 is fixedly connected to the lower end of the box body 1, the support leg 14 extends to the ground away from one end of the box body 1, and the bottom end of the box body 1 is funnel-shaped.

[0036] The steel pipe is placed on the first fixing plate 4, and moves from the pipe inlet 11 into the box body 1, while the gas in the box body 1 moves out of the box body 1 from the gas outlet pipe 82 at the upper end.

[0037] refer to Figure 1 and Figure 2A first rotating roller 2 is arranged above one end of the first fixed plate 4 close to the pipe inlet 11, and the length direction of the first rotating roller 2 is perpendicular to the moving direction of the steel pipe. A supporting assembly 3 for supporting the first rotating roller 2 is arranged on the first fixed plate 4, and the supporting assembly 3 includes a first supporting plate 31 and a second supporting plate 32, and the first supporting plate 31 and the second supporting plate 32 are respectively fixedly connected to the opposite sides of the upper surface of the first fixed plate 4, the first supporting plate 31 and the second supporting plate 32 are parallel, and the length direction of the first supporting plate 31 is parallel to the moving direction of the steel pipe, and the first rotating roller 2 is rotatably connected between the first supporting plate 31 and the second supporting plate 32, and a motor 21 is fixedly connected to one side wall of the box body 1 close to the first supporting plate 31, and the output shaft of the motor 21 passes through the first supporting plate 31 and is fixedly connected to one end of the first rotating roller 2.

[0038] The steel pipe is placed on the first rotating roller 2 , and the motor 21 is started. The motor 21 drives the first rotating roller 2 to rotate, and the first rotating roller 2 drives the steel pipe to move into the box body 1 .

[0039] refer to Figure 1 and Figure 2 A plurality of first auxiliary rollers 41 are rotatably connected between the first support plate 31 and the second support plate 32. The plurality of first auxiliary rollers 41 are sequentially arranged along the length direction of the first support plate 31. The first auxiliary rollers 41 are parallel to the first rotating roller 2. A first sprocket 42 is provided on the output shaft of the motor 21. The output shaft of the motor 21 passes through the first sprocket 42 and is fixedly connected to the first sprocket 42. One end of the first auxiliary roller 41 passes through the first support plate 31 and is rotatably connected to the first support plate 31. The first auxiliary roller 41 is fixedly connected to the second sprocket 43 at one end away from the second support plate 32. A chain 44 is provided on the outer sleeves of the first sprocket 42 and the second sprocket 43.

[0040] When the steel pipe is on the first rotating roller 2, it is also on the first auxiliary roller 41, the motor 21 drives the first sprocket 42 to rotate, the first sprocket 42 drives the chain 44 to rotate, the chain 44 drives the second sprocket 43 to rotate, the second sprocket 43 drives the first auxiliary roller 41 to rotate, and the first auxiliary roller 41 drives the steel pipe to move toward the box body 1.

[0041] refer to Figure 2 and Figure 3A plurality of first transmission rods 5 are rotatably connected between the first support plate 31 and the second support plate 32, the first transmission rod 5 and the first auxiliary roller 41 are parallel, the plurality of first transmission rods 5 are sequentially arranged along the length direction of the first support plate 31, and the plurality of first transmission rods 5 and the plurality of first auxiliary rollers 41 are alternately arranged, one end of the first transmission rod 5 passes through the first support plate 31 and is rotatably connected to the first support plate 31, the first transmission rod 5 is fixedly connected to the third sprocket 51 at one end away from the second support plate 32, the chain 44 is sleeved outside the third sprocket 51, guide plates 45 are provided on opposite sides of the first support plate 31 and the second support plate 32, the guide plates 45 are parallel to the first support plate 31, and telescopic rods 46 and springs 47 are fixedly provided between the first support plate 31 and the adjacent guide plates 45 and between the second support plate 32 and the adjacent guide plates 45, the telescopic rod 46 is composed of a plurality of rod bodies sleeved, the rod bodies are slidably connected, and the spring 47 is sleeved outside the telescopic rod 46.

[0042] The upper and lower ends of the guide plate 45 on the side away from the telescopic rod 46 are fixedly connected with a third support plate 48, the third support plate 48 is parallel to the first fixed plate 4, and a second auxiliary roller 49 is rotatably connected between the third support plates 48 on both sides. A slide groove 53 is opened on the side wall of the first transmission rod 5 along its own length direction. The first transmission rod 5 is slidably connected with two sliders 54 in the slide groove 53 along the length direction of the slide groove 53. Two sleeves 52 are sleeved on the first transmission rod 5. The sleeve 52 and the slider 54 are fixedly connected and one-to-one corresponding to the side away from the bottom wall of the slide groove 53. A first bevel gear 55 is arranged on the sleeve 52, and the sleeve 52 penetrates The first bevel gear 55 is fixedly connected to the first vertical roller, a swivel 56 is sleeved on the sleeve 52, the swivel 56 and the sleeve 52 are rotatably connected, a connecting rod 57 is fixedly provided between the guide plate 45 and the swivel 56 and corresponds to each other, a second transmission rod 58 is provided on the third support plate 48 at the lower end of the guide plate 45, the second transmission rod 58 penetrates the third support plate 48 and is rotatably connected to the third support plate 48, one end of the second transmission rod 58 is fixedly connected to one end of the second auxiliary roller 49, and a second bevel gear 59 is fixedly connected to the end of the second transmission rod 58 away from the second auxiliary roller 49, and the second bevel gear 59 is meshed with the first bevel gear 55.

[0043] When placing the steel pipe on the first auxiliary roller 41, the guide plates 45 on both sides are moved in opposite directions. The springs 47 are compressed under the guidance of the telescopic rods 46. When the steel pipe is placed on the first auxiliary roller 41, the steel pipe is between the guide plates 45 on both sides. The guide plates 45 are released, and the springs 47 release their elastic force to push the guide plates 45 toward the steel pipe. The guide plates 45 drive the second auxiliary rollers 49 to move, and the second auxiliary rollers 49 abut against the steel pipe. At the same time, the chain 44 drives the third sprocket 51 to rotate, and the third sprocket 51 drives the first transmission rod 5 to rotate, and the first transmission rod 5 drives the sleeve 52 to move. The sleeve 52 drives the first bevel gear 55 to rotate, the first bevel gear 55 drives the second bevel gear 59 to rotate, the second bevel gear 59 drives the second transmission rod 58 to rotate, the second transmission rod 58 drives the second auxiliary roller 49 to rotate, and the second auxiliary roller 49 drives the steel pipe to move toward the box body 1 during the rotation of the second auxiliary roller 49. At the same time, during the movement of the guide plate 45, the guide plate 45 drives the connecting rod 57 to move, the connecting rod 57 drives the swivel 56 to move, and the swivel 56 drives the sleeve 52 to move along the length direction of the first transmission rod 5, so that the first bevel gear 55 and the second bevel gear 59 are always in a meshing state.

[0044] refer to Figure 4 and Figure 5 A second protective cover 81 is bolted to the upper end of the box body 1, and the second protective cover 81 is directly below the first protective cover 8. The second protective cover 81 is a mesh structure. A plurality of spray gun groups 13 are arranged on the inner wall of the box body 1. The plurality of spray gun groups 13 are arranged along the moving direction of the steel pipe from the pipe inlet 11 to the pipe outlet 12. Each group of spray gun groups 13 includes a first spray gun 131 arranged directly below the steel pipe, and four second spray guns 132 uniformly distributed around the steel pipe. The angle between the direction of one of the second spray guns 132 and the direction of the first spray gun 131 is 45°. A paint outlet 92 is opened at the bottom end of the box body 1, and a pipe outlet 12 is opened through a side wall of the box body 1 away from the pipe inlet 11.

[0045] The first spray gun 131 and the second spray gun 132 spray paint onto the portion of the steel pipe in the box body 1. At the same time, the positions of the first spray gun 131 and the four second spray guns 132 are distributed so that the surface of the steel pipe is sprayed more evenly. The sprayed portion of each steel pipe is moved out of the box body 1 from the pipe outlet 12. During the spraying process, the paint falling from the steel pipe is moved out of the box body 1 from the paint outlet 92 at the bottom of the box body 1. At the same time, the second protective cover 81 blocks external impurities, making it difficult for external impurities to fall onto the steel pipe being sprayed.

[0046] refer to Figure 4The box body 1 is fixedly connected with a second fixed plate 7 at the pipe outlet 12, the second fixed plate 7 is horizontally arranged, and fourth support plates 71 are fixedly connected on opposite sides of the upper surface of the second fixed plate 7, the fourth support plate 71 is perpendicular to the second fixed plate 7, and a second rotating roller 72 is rotatably connected between the fourth support plates 71 on both sides, and the second rotating roller 72 is parallel to the second fixed plate 7.

[0047] When the steel pipe moves out of the box body 1, the steel pipe falls onto the second rotating roller 72. During the movement of the steel pipe, the second rotating roller 72 is driven to rotate. The setting of the second rotating roller 72 facilitates the movement of the steel pipe.

[0048] The implementation principle of a steel pipe spray paint box in the embodiment of the present application is: place the steel pipe on the first auxiliary roller 41 and the first rotating roller 2, start the motor 21, the motor 21 drives the first rotating roller 2 to rotate, and at the same time the motor 21 drives the first sprocket 42 to rotate, the first sprocket 42 drives the chain 44 to rotate, the chain 44 drives the second sprocket 43 to rotate, the second sprocket 43 drives the first auxiliary roller 41 to rotate, the first auxiliary roller 41 and the first rotating roller 2 drive the steel pipe to move into the box body 1, after the steel pipe enters the box body 1, the first spray gun 131 and the second spray gun 132 spray the steel pipe, and the position distribution of the first spray gun 131 and the second spray gun 132 effectively improves the uniformity of spraying on the surface of the steel pipe.

[0049] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A steel pipe spray paint box, comprising a box body (1), characterized in that: The box (1) is provided with a pipe inlet (11) and a pipe outlet (12) on opposite side walls respectively; along the moving direction of the steel pipe from the pipe inlet to the pipe outlet, a plurality of spray gun groups (13) are provided on the inner wall of the box, each spray gun group (13) comprising a first spray gun (131) arranged directly below the steel pipe, and four second spray guns (132) uniformly distributed around the circumference of the steel pipe, and the angle between the direction of one of the second spray guns (132) and the direction of the first spray gun (131) is 45 degrees.

2. A steel pipe spray paint box according to claim 1, characterized in that: The box body (1) is fixedly provided with a first rotating roller (2) at the pipe inlet (11); the box body (1) is provided with a support assembly (3) for supporting the first rotating roller (2); a motor (21) is provided on one side of the first rotating roller (2); the motor (21) and the box body (1) are fixedly connected; the output shaft of the motor (21) and one end of the first rotating roller (2) are fixedly connected; the box body (1) is fixedly connected with a first fixing plate (4) at the pipe inlet (11); the first fixing plate (4) is arranged horizontally.

3. A steel pipe spray paint box according to claim 2, characterized in that: The support assembly (3) comprises a first support plate (31) and a second support plate (32), one side of the first support plate (31) and the second support plate (32) are fixedly connected to the upper surface of the first fixed plate (4), the first support plate (31) and the second support plate (32) are parallel, the first support plate (31) and the first fixed plate (4) are perpendicular, the first rotating roller (2) is rotatably connected between the first support plate (31) and the second support plate (32), the length direction of the first rotating roller (2) is perpendicular to the moving direction of the steel pipe, and a plurality of first auxiliary rollers (41) are arranged above the first fixed plate (4), and the plurality of first auxiliary rollers (41) are rotatably connected to the first support plate A plurality of first auxiliary rollers (41) are arranged in sequence along the length direction of the first fixed plate (4), the first auxiliary rollers (41) and the first rotating roller (2) are located in the same horizontal plane, a first sprocket (42) is arranged on the output shaft of the motor (21), the output shaft of the motor (21) passes through the first sprocket (42) and the first sprocket (42) is fixedly connected, one end of the first auxiliary roller (41) close to the first supporting plate (31) passes through the first supporting plate (31), one end of the first auxiliary roller (41) is fixedly connected to the second sprocket (43), and a chain (44) is arranged on the outer shells of the first sprocket (42) and the second sprocket (43).

4. A steel pipe spray paint box according to claim 3, characterized in that: A guide plate (45) is provided on one side opposite to the first support plate (31) and the second support plate (32), the guide plate (45) and the first support plate (31) are parallel, a telescopic rod (46) and a spring (47) are fixedly provided between the guide plate (45) and the first support plate (31) of the adjacent first support plate (31) and between the guide plate (45) and the second support plate (32) of the adjacent second support plate (32), the spring (47) is sleeved outside the telescopic rod (46), the upper and lower ends of the opposite sides of the guide plates (45) on both sides are fixedly connected with a third support plate (48), the third support plate (48) and the first fixed plate (4), a second auxiliary roller (49) is rotatably connected between the upper and lower third support plates (48), the second auxiliary roller (49) and the guide plate (45) are parallel.

5. A steel pipe spray paint box according to claim 4, characterized in that: A first transmission rod (5) is arranged on the first support plate (31), the first transmission rod (5) passes through the first support plate (31) and is rotatably connected to the first support plate (31), the length direction of the first transmission rod (5) is perpendicular to the first support plate (31), one end of the first transmission rod (5) extends to the second support plate (32) and is rotatably connected to the second support plate (32), one end of the first transmission rod (5) away from the second support plate (32) is fixedly connected to a third sprocket (51), the chain (44) is sleeved outside the third sprocket (51), two sleeves (52) are sleeved on the first transmission rod (5), the sleeves (52) and the first transmission rod (5) are slidably connected along the length direction of the first transmission rod (5), and the sleeves (52) are both provided with first bevel gears. The guide plate (45) and the swivel ring (56) are connected to each other in a one-to-one manner. A second transmission rod (58) is arranged on the third support plate (48) at the lower end of the guide plate (45). One end of the second transmission rod (58) passes through the third support plate (48) and is fixedly connected to one end of the second auxiliary roller (49). One end of the second transmission rod (58) is fixedly connected to the second bevel gear (59) away from the second auxiliary roller (49). The second bevel gear (59) and the first bevel gear (55) are meshed and correspond to each other.

6. A steel pipe spray paint box according to claim 2, characterized in that: The box body (1) is fixedly connected to a second fixed plate (7) at the pipe outlet (12); the second fixed plate (7) is arranged horizontally; fourth support plates (71) are fixedly connected to opposite sides of the upper surface of the second fixed plate (7); a second rotating roller (72) is rotatably connected between the fourth support plates (71) on both sides; the second rotating roller (72) and the first rotating roller (2) are parallel and located in the same horizontal plane.

7. A steel pipe paint spraying box according to claim 1, characterized in that: The upper end of the box body (1) is open, a first protective cover (8) is bolted to the upper end of the box body (1), an air outlet pipe (82) is fixedly connected to the top of the first protective cover (8), a second protective cover (81) is arranged below the second protective cover (81), the second protective cover (81) is a mesh structure, and the second protective cover (81) and the upper end of the box body (1) are bolted.

8. The steel pipe spray paint box according to claim 1, characterized in that: A side wall of the box body (1) is provided with an inspection opening (9), a closed door (91) is hingedly connected to the inspection opening (9), and a paint outlet (92) is provided on the bottom wall of the box body (1).

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