An automatic spraying production device for steel structures

Abstract

The present invention relates to the technical field of steel structure spraying, and specifically relates to an automatic steel structure spraying production device, which includes a connecting rod and a spraying workbench. A second support frame is fixed at the end of the connecting rod. A second guiding rod is rotatably arranged on the inner wall of the second support frame. A second sliding block is fixed on the outer wall of the second guiding rod. A first torsion spring is fixed on the outer wall of the second sliding block, and the other end of the first torsion spring is fixed to the inner wall of the second support frame. In this automatic steel structure spraying production device, by starting the driving motor, the steel structure part moves in a circular motion on one side, swings reciprocally at the same time, and moves forward and backward reciprocally for a short distance at the same time, so that different sides of the steel structure part reciprocally approach and move away from the sprayer. The paint spray sprayed by the sprayer can more evenly cover the surface of the steel structure part.

Description

Technical Field

[0001] The present invention relates to the technical field of steel structure spraying, and specifically provides an automatic steel structure spraying production device. Background Art

[0002] Steel structures are applied in various fields of construction. During the production process of steel structures, it is necessary to spray the outer surface of the steel structures. Steel structure spraying is a common surface treatment technology, which can not only protect the steel structure from corrosion and oxidation, but also improve its aesthetics and durability.

[0003] Currently, the existing steel structure spraying devices on the market usually use a large-range spray-type spraying device to spray the surface of the steel structure in a large range to achieve a uniform coverage effect. However, for steel structures with special-shaped outer shapes, the grooves and holes on their surfaces are prone to spraying dead angles when facing large-range spray-type spraying. Therefore, a device for uniform spraying coverage of special-shaped steel structures is needed. Summary of the Invention

[0004] The present invention provides an automatic steel structure spraying production device, which has the beneficial effect of being convenient for adapting to special-shaped steel structures for maximum uniform spraying, and solves the problem mentioned in the above background art that for some steel structures with special-shaped outer shapes, the grooves and holes on their surfaces are prone to spraying dead angles when facing large-range spray-type spraying. To achieve the above object, the present invention provides the following technical solution: An automatic steel structure spraying production device includes a connecting rod and a spraying workbench. A second support frame is fixed at the end of the connecting rod. A second guide rod is rotatably arranged on the inner wall of the second support frame. A second slider is fixed on the outer wall of the second guide rod. A first torsion spring is fixed on the outer wall of the second slider, and the other end of the first torsion spring is fixed to the inner wall of the second support frame;

[0005] A first fixing block is fixed on the outer wall of the second slider. A clamping mechanism for clamping a steel structure member is assembled on the first fixing block. The clamping mechanism includes an arc-shaped clamping plate;

[0006] A second guide rod for changing the position of the steel structure member is fixed on the outer wall of the second slider. A first rotating frame is fixed on the spraying workbench. A track groove for guiding the movement of the second guide rod is opened on the inner wall of the first rotating frame.

[0007] As an alternative solution for an automatic steel structure spraying production device according to the present invention, wherein: a first support frame is fixed on the spraying workbench, a driving motor is installed on the first support frame, a guiding frame is fixed at the output end of the driving motor, a guiding groove is formed in the inner wall of the guiding frame, a first guiding rod is fixed on the inner wall of the guiding groove, a first sliding block is slidably arranged on the outer wall of the first guiding rod, a first return spring is fixed at one end of the first sliding block, the first return spring is sleeved on the first guiding rod, the other end of the first return spring is fixed to the inner wall of the guiding groove, and one end of a connecting rod is fixed to the first sliding block.

[0008] As an alternative solution for an automatic steel structure spraying production device according to the present invention, wherein: a plurality of evenly distributed bumps are fixed on the inner wall of the track groove, the bumps are in a hemispherical shape, and one end of the second guiding rod slides in the track groove.

[0009] As an alternative solution for an automatic steel structure spraying production device according to the present invention, wherein: a plurality of second fixing blocks are fixed on the outer wall of the first fixing block, a third guiding rod is rotatably arranged in the inner wall of each of the plurality of second fixing blocks, a second rotating frame is fixed at the end of the third guiding rod, a second torsion spring is sleeved on the outer wall of the third guiding rod, one end of the second torsion spring is fixed to the outer wall of the second fixing block, the other end of the second torsion spring is fixed to the second rotating frame, the second rotating frame is fixed to one end of an arc-shaped clamping plate, and a clamping block is fixed at the end of the arc-shaped clamping plate.

[0010] As an alternative solution for an automatic steel structure spraying production device according to the present invention, wherein: two extension rods are fixed on the outer wall of the first fixing block, a first sleeve is fixed on the outer wall of each of the two extension rods, the extension rod is communicated with the first sleeve, a piston is slidably arranged in the inner wall of the first sleeve, the outer contour of the piston matches the inner contour of the first sleeve, a second return spring is fixed on the outer wall of the piston, and one end of the second return spring is fixed to the inner wall of the first sleeve.

[0011] As an alternative solution for an automatic steel structure spraying production device according to the present invention, wherein: a first guiding rod is fixed at one end of the first sleeve, and a first ball is rotatably arranged at the end of the first guiding rod.

[0012] As an alternative solution for an automatic steel structure spraying production device according to the present invention, wherein: a plurality of fixing frames are fixed on the first fixing block, air bags are assembled in the inner walls of the fixing frames, push rods for pushing are fixed at both ends of the air bags, and a second ball is rotatably arranged at the end of the push rod.

[0013] As an alternative embodiment of the automatic spraying production device for steel structures according to the present invention, wherein: air delivery pipes are fixed on the two extension rods, one end of each air delivery pipe is communicated with an airbag, and the air delivery pipe is communicated with the first sleeve.

[0014] As an alternative embodiment of the automatic spraying production device for steel structures according to the present invention, wherein: a guiding boss for abutting against the first ball is fixed on the spraying workbench.

[0015] As an alternative embodiment of the automatic spraying production device for steel structures according to the present invention, wherein: a hot dryer for drying the steel structure member is installed on the spraying workbench, and a sprayer is installed on the hot dryer.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] In the present invention, by starting the drive motor, when the steel structure member is clamped and rotated circumferentially, it can also perform a reciprocating swinging motion along the circumferential rotation trajectory, so that more positions on the outer surface of the steel structure member can be adjusted to face the direction of the spray ejected by the sprayer, making the spraying more evenly cover the surface of the steel structure member.

[0018] In the present invention, by starting the drive motor, the steel structure member can perform a reciprocating forward and backward movement for a short distance, so that the two sides of the steel structure member reciprocate to approach and then move away from the sprayer, causing the distance and force at which the paint spray ejected by the sprayer contacts the two sides of the steel structure to change continuously, thereby further covering the surface of the steel structure member more evenly.

[0019] In the present invention, by starting the drive motor, during the circumferential rotation of the steel structure member being clamped, the operation of removing the occlusion of the clamped occlusion area of the steel structure member is realized, and while removing the occlusion, the clamping effect on the other two sides can be maintained, so that a larger area of the surface of the steel structure member can be evenly sprayed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 is a schematic diagram of a partial structure of the present invention;

[0022] Figure 3 is of the present invention Figure 2 partial enlarged structure schematic diagram;

[0023] Figure 4 is a schematic diagram of the enlarged top view sectional structure of the first rotating frame and its periphery of the present invention;

[0024] Figure 5 is of the present invention Figure 3Front elevation sectional structure schematic diagram;

[0025] Figure 6 Front elevation enlarged structure schematic diagram of the first rotating frame and its periphery of the present invention;

[0026] Figure 7 For the present invention Figure 6 Enlarged structure schematic diagram at position A in;

[0027] Figure 8 For the present invention Figure 6 Partial enlarged structure schematic diagram in;

[0028] Figure 9 Internal structure schematic diagram of the fixed frame of the present invention.

[0029] Reference numerals: 1, spraying workbench; 101, guiding boss; 2, first support frame; 3, driving motor; 4, guiding frame; 5, guiding groove; 6, first guiding rod; 7, first slider; 8, first return spring; 10, first rotating frame; 11, connecting rod; 12, second support frame; 13, second guiding rod; 14, first torsion spring; 15, second slider; 16, first fixing block; 17, second fixing block; 18, third guiding rod; 19, second torsion spring; 20, second rotating frame; 21, arc-shaped clamping plate; 22, clamping block; 23, steel structure member; 24, extension rod; 25, first sleeve; 26, piston; 27, second return spring; 28, first guide rod; 29, first ball; 30, air delivery pipe; 31, fixed frame; 32, airbag; 33, push rod; 34, second ball; 35, second guide rod; 36, track groove; 37, convex block; 38, hot dryer; 39, sprayer. Specific embodiments

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] Embodiment 1. The purpose of this embodiment is to facilitate the solution of the problem that for steel structures with special required shapes, there are easily spraying dead corners on the surfaces of grooves and holes when facing large-range spray spraying. Please refer to Figures 1-9, a steel structure automatic spraying production device, including a connecting rod 11 and a spraying workbench 1. At the end of the connecting rod 11, a second support frame 12 is fixed. Inside the inner wall of the second support frame 12, a second guiding rod 13 is rotatably arranged. On the outer wall of the second guiding rod 13, a second slider 15 is fixed. On the outer wall of the second slider 15, a first torsion spring 14 is fixed. The other end of the first torsion spring 14 is fixed to the inner wall of the second support frame 12;

[0032] On the outer wall of the second slider 15, a first fixing block 16 is fixed. On the first fixing block 16, a clamping mechanism for clamping the steel structure part 23 is assembled. The clamping mechanism includes an arc-shaped clamping plate 21;

[0033] On the spraying workbench 1, a first support frame 2 is fixed. On the first support frame 2, a driving motor 3 is installed. At the output end of the driving motor 3, a guiding frame 4 is fixed. Inside the inner wall of the guiding frame 4, a guiding groove 5 is opened. On the inner wall of the guiding groove 5, a first guiding rod 6 is fixed. On the outer wall of the first guiding rod 6, a first slider 7 is slidably arranged. At one end of the first slider 7, a first return spring 8 is fixed. The first return spring 8 is sleeved on the first guiding rod 6. The other end of the first return spring 8 is fixed to the inner wall of the guiding groove 5. One end of the first slider 7 is fixed to one end of the connecting rod 11;

[0034] On the inner wall of the track groove 36, a plurality of uniformly distributed bumps 37 are fixed. The bumps 37 are set in a hemispherical shape. One end of the second guiding rod 35 slides in the track groove 36;

[0035] On the outer wall of the first fixing block 16, a plurality of second fixing blocks 17 are fixed. Inside the inner walls of the plurality of second fixing blocks 17, third guiding rods 18 are rotatably arranged. At the end of the third guiding rod 18, a second rotating frame 20 is fixed. On the outer wall of the third guiding rod 18, a second torsion spring 19 is sleeved. One end of the second torsion spring 19 is fixed to the outer wall of the second fixing block 17. The other end of the second torsion spring 19 is fixed to the second rotating frame 20. The second rotating frame 20 is fixed to one end of the arc-shaped clamping plate 21. At the end of the arc-shaped clamping plate 21, a clamping block 22 is fixed;

[0036] On the spraying workbench 1, a hot dryer 38 for drying the steel structure part 23 is installed. On the hot dryer 38, a sprayer 39 is installed.

[0037] When using this spraying device, it should be noted that, as shown in the attached Figure 6 and the attached Figure 7As shown in the figure, in the initial state, the torsional force of the second torsion spring 19 will cause the second rotating frame 20 and the arc-shaped clamping plate 21 to be in the state as shown in the figure, and the four arc-shaped clamping plates 21 and the clamping block 22 are in a close state. Therefore, it is necessary to manually bend the arc-shaped clamping plate 21 to cause the arc-shaped clamping plate 21 to rotate along the second fixed block 17 with the second rotating frame 20 and the third guide rod 18. During the rotation, the torsional restoring force of the second torsion spring 19 is overcome, and the steel structure to be sprayed is clamped and fixed between the four arc-shaped clamping plates 21 and the clamping block 22 to prevent the steel structure 23 from falling or tipping over during the subsequent spraying operation.

[0038] After being ready, the sprayer 39 can be started to spray the coating onto the steel structure 23. During the spraying process, the transmission motor 3 is started, and the output end of the transmission motor 3 rotates with the guide frame 4. During the rotation of the guide frame 4, the connecting rod 11 is rotated synchronously. When the connecting rod 11 rotates, the second support frame 12 is rotated synchronously. When the second support frame 12 rotates, the second guide rod 35 is rotated in a circumferential direction.

[0039] When the second guide rod 35 rotates in a circle, the end of the second guide rod 35 slides and guides along the track in the track groove 36. Since the track groove 36 is set as a wavy track, the end of the second guide rod 35 will be guided by the track of the track groove 36 when moving along the track groove 36, and will be lifted and pressed down reciprocatingly up and down. It should be noted that the inner width of the track groove 36 is sufficient to allow a small lifting and pressing action of the end of the second guide rod 35.

[0040] When the end of the second guide rod 35 is lifted up and pressed down reciprocatingly, the other end of the second guide rod 35 will swing up and down along the rotation connection of the second guide rod 13 on the inner wall of the second support frame 12 with the second slider 15 and the second guide rod 13;

[0041] The swing of the second slider 15 will cause the first fixed block 16 and the four clamping blocks 22 and the arc-shaped clamping plate 21 that are clamping the steel structure 23 to swing back and forth synchronously. At this time, the steel structure 23 can swing back and forth along the circular rotation trajectory while being clamped, so that more positions on the outer surface of the steel structure 23 can be adjusted to face the direction of the sprayer 39, so that the spray can cover the surface of the steel structure 23 more evenly.

[0042] After spraying is completed, the hot dryer 38 is started to perform rapid hot drying.

[0043] In this embodiment: By starting the drive motor 3, during the circumferential rotation of the steel structure member 23 being clamped, it can also perform a reciprocating swinging motion along the circumferential rotation trajectory, enabling more positions on the outer surface of the steel structure member 23 to be adjusted to face the spraying direction of the sprayer 39, so that the spraying is more evenly covered on the surface of the steel structure member 23.

[0044] Embodiment 2. The purpose of this embodiment is to further promote the solution to the problem of more evenly spraying the surface of the steel structure member 23. Please refer to Figures 1-9 , an automatic spraying production device for steel structures. A second guide rod 35 for changing the position of the steel structure member 23 is fixed to the outer wall of the second slider 15. A first rotating frame 10 is fixed on the spraying workbench 1, and a track groove 36 for guiding the movement of the second guide rod 35 is provided on the inner wall of the first rotating frame 10.

[0045] During the spraying process of the steel structure member 23, as the second guide rod 35 moves circumferentially along the track groove 36, the end of the second guide rod 35 will also intermittently contact the surface of the convex blocks 37 evenly distributed in the track groove 36 as it moves. Whenever the second guide rod 35 contacts the surface of the hemispherical convex block 37, it will cause the second guide rod 35 to be subjected to the force from the convex block 37, prompting the second guide rod 35 to displace a small distance in the direction away from the convex block 37 to adapt to the outer contour of the convex block 37. At this time, when the second guide rod 35 displaces, it will drive the second slider 15, the second guide rod 13, and the second support frame 12 to displace synchronously as a whole. The displacement of the second support frame 12 will drive the connecting rod 11 to displace synchronously. The displacement of the connecting rod 11 prompts the first slider 7 fixed at one end of it to displace synchronously. When the first slider 7 moves, it compresses the first return spring 8 for subsequent resetting, and when the first slider 7 displaces, it moves along the guidance of the first guide rod 6 for convenient resetting. At this time, as the second support frame 12 displaces, it will drive the entire structure of the clamped steel structure member 23 to displace a small distance until the end of the second guide rod 35 completely contacts and passes over the surface of a single convex block 37. The restoring force of the first return spring 8 drives the first slider 7 to reset, and the reset of the first slider 7 drives the second support frame 12 and the steel structure member 23 to reset as a whole;

[0046] Since a plurality of convex blocks 37 are evenly distributed in the track groove 36, when the second guide rod 35 moves circumferentially along the track groove 36, it can cause the steel structure member 23 to rotate circumferentially, swing reciprocally, and move forward and backward reciprocally a small distance at the same time, enabling different sides of the steel structure member 23 to reciprocally approach and move away from the sprayer 39. The paint spray sprayed by the sprayer 39 can be more evenly covered on the surface of the steel structure member 23.

[0047] In this embodiment: By starting the drive motor 3, the steel structure member 23 is caused to move circumferentially on one side, swing reciprocally at the same time, and advance and retreat reciprocally a short distance at the same time, so that different sides of the steel structure member 23 reciprocally approach and move away from the sprayer 39. The paint spray sprayed by the sprayer 39 can more evenly cover the surface of the steel structure member 23.

[0048] Embodiment 3. The purpose of this embodiment is to facilitate the solution of the problem that since the steel structure member 23 is clamped by a plurality of clamping blocks 22 and arc-shaped clamping plates 21, there will be a certain shielding effect at the positions clamped by the clamping blocks 22 and arc-shaped clamping plates 21, which will cause the clamped positions not to be sprayed with paint. Please refer to Figures 1-9 , an automatic spraying production device for steel structures. Two extension rods 24 are fixed to the outer wall of the first fixing block 16. The outer walls of the two extension rods 24 are both fixed with first sleeves 25. The extension rod 24 is communicated with the first sleeve 25. A piston 26 is slidably arranged on the inner wall of the first sleeve 25. The outer contour of the piston 26 matches the inner contour of the first sleeve 25. A second return spring 27 is fixed to the outer wall of the piston 26. One end of the second return spring 27 is fixed to the inner wall of the first sleeve 25;

[0049] One end of the first sleeve 25 is fixed with a first guide rod 28, and the end of the first guide rod 28 is rotatably provided with a first ball 29;

[0050] A plurality of fixing frames 31 are fixed on the first fixing block 16. Air bags 32 are assembled on the inner walls of the fixing frames 31. Push rods 33 for pushing are fixed to both ends of the air bags 32. The ends of the push rods 33 are rotatably provided with second balls 34;

[0051] An air delivery pipe 30 is fixed to the two extension rods 24. One end of the air delivery pipe 30 is communicated with the air bag 32, and the air delivery pipe 30 is communicated with the first sleeve 25;

[0052] A guiding boss 101 for abutting against the first ball 29 is fixed on the spraying workbench 1.

[0053] In Embodiment 1, as the second guide rod 35 moves along the trajectory in the trajectory groove 36, the first fixing block 16 will swing reciprocally during the rotation process. When the second guide rod 35 moves to the low position of the trajectory in the trajectory groove 36, and while the first fixing block 16 is swinging, the first fixing block 16 will drive the first guide rods 28 on both sides to swing up and down synchronously. When one of the first guide rods 28 swings downward, the first ball 29 at the end will abut against the surface of the guiding boss 101, causing the first guide rod 28 to be stressed and drive the piston 26 to slide deeper into the first sleeve 25, and stretching the second return spring 27 during the sliding process to facilitate subsequent resetting;

[0054] As the piston 26 slides deeper into the first sleeve 25, due to the matching of the outer contour of the piston 26 with the inner contour of the first sleeve 25, the piston 26 has a good seal with the inner wall of the first sleeve 25. The piston 26 will continuously compress the air in the first sleeve 25, prompting the air to enter the air delivery pipe 30 through the holes in the extension rod 24. As shown in the appendix Figure 8 and then be delivered into the corresponding airbag 32 from the air delivery pipe 30, prompting the airbag 32 to inflate and expand. Both sides of the airbag 32 expand and elongate simultaneously, driving the push rods 33 on both sides to start moving in opposite directions. The movement of the push rods 33 will cause the second balls 34 at their ends to contact the arc-shaped clamping plate 21, rotating the arc-shaped clamping plate 21 and the third guide rod 18 along the second fixed block 17, releasing the clamping on the left and right sides of the outer wall of the steel structure member 23 by the arc-shaped clamping plate 21 and the clamping block 22, and exposing both sides of the steel structure member 23. At this time, the steel structure member 23 is clamped from four sides to two sides in the front and back, and the unobstructed two sides can be evenly sprayed;

[0055] When the second guide rod 35 slides to the highest position of the track according to the track groove 36, the above two arc-shaped clamping plates 21 and clamping blocks 22 will reset and clamp the steel structure member 23 again. At this time, the second guide rod 35 will drive the entire first fixed block 16 to swing upward, prompting the first guide rod 28 on the other side of the first fixed block 16 to drive the first ball 29 at its end to contact the surface of the guiding boss 101 when swinging downward, thereby repeating the above process, prompting another airbag 32 to inflate and expand. The other airbag 32 drives the corresponding push rod 33 to push and release the clamping of the arc-shaped clamping plates 21 and clamping blocks 22 on the front and back sides of the steel structure member 23, so as to expose the surface of the steel structure member 23 for spraying.

[0056] In this embodiment: By starting the driving motor 3, during the circumferential rotation of the steel structure member 23 being clamped, the operation of removing the occlusion from the clamped and occluded area of the steel structure member 23 is realized, and the clamping effect on the other two sides can be maintained while removing the occlusion.

[0057] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0058] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An automatic spraying production device for steel structures, comprising a connecting rod (11) and a spraying workbench (1), characterized in that: A second support frame (12) is fixed to the end of the connecting rod (11); a second guide rod (13) is rotatably provided on the inner wall of the second support frame (12); a second slider (15) is fixed to the outer wall of the second guide rod (13); a first torsion spring (14) is fixed to the outer wall of the second slider (15); and the other end of the first torsion spring (14) is fixed to the inner wall of the second support frame (12); A first fixing block (16) is fixed to the outer wall of the second sliding block (15), and a clamping mechanism for clamping the steel structure (23) is mounted on the first fixing block (16), the clamping mechanism comprising an arc-shaped clamping plate (21); A second guide rod (35) for changing the position of the steel structure (23) is fixed on the outer wall of the second sliding block (15); a first rotating frame (10) is fixed on the spraying workbench (1); a track groove (36) for guiding the movement of the second guide rod (35) is formed on the inner wall of the first rotating frame (10); the track groove (36) is arranged in a wavy track; A first support frame (2) is fixed on the spraying workbench (1), a transmission motor (3) is installed on the first support frame (2), a guide frame (4) is fixed to the output end of the transmission motor (3), a guide groove (5) is provided on the inner wall of the guide frame (4), a first guide rod (6) is fixed to the inner wall of the guide groove (5), a first slider (7) is slidably provided on the outer wall of the first guide rod (6), a first return spring (8) is fixed to one end of the first slider (7), the first return spring (8) is sleeved on the first guide rod (6), the other end of the first return spring (8) is fixed to the inner wall of the guide groove (5), and the first slider (7) is fixed to one end of the connecting rod (11); A plurality of evenly distributed protrusions (37) are fixed to the inner wall of the track groove (36), wherein the protrusions (37) are arranged in a hemispherical shape, and one end of the second guide rod (35) slides in the track groove (36).

2. The automatic spraying production device for steel structures according to claim 1 is characterized in that: A plurality of second fixed blocks (17) are fixed to the outer wall of the first fixed block (16); a third guide rod (18) is rotatably provided on the inner walls of the plurality of second fixed blocks (17); a second rotating frame (20) is fixed to the end of the third guide rod (18); a second torsion spring (19) is sleeved on the outer wall of the third guide rod (18); one end of the second torsion spring (19) is fixed to the outer wall of the second fixed block (17); the other end of the second torsion spring (19) is fixed to the second rotating frame (20); the second rotating frame (20) is fixed to one end of an arc-shaped clamping plate (21); and a clamping block (22) is fixed to the end of the arc-shaped clamping plate (21).

3. The automatic spraying production device for steel structures according to claim 1 is characterized in that: Two extension rods (24) are fixed to the outer wall of the first fixed block (16), and a first sleeve (25) is fixed to the outer wall of each of the two extension rods (24). The extension rods (24) are in communication with the first sleeve (25). A piston (26) is slidably provided on the inner wall of the first sleeve (25). The outer contour of the piston (26) matches the inner contour of the first sleeve (25). A second return spring (27) is fixed to the outer wall of the piston (26), and one end of the second return spring (27) is fixed to the inner wall of the first sleeve (25).

4. The automatic spraying production device for steel structures according to claim 3 is characterized in that: A first guide rod (28) is fixed to one end of the first sleeve (25), and a first ball (29) is rotatably disposed on the end of the first guide rod (28).

5. The automatic spraying production device for steel structures according to claim 3 is characterized in that: A plurality of fixing frames (31) are fixed on the first fixing block (16), the inner walls of the fixing frames (31) are each equipped with an air bag (32), both ends of the air bag (32) are each fixed with a push rod (33) for pushing, and the end of the push rod (33) is rotatably provided with a second ball (34).

6. The automatic spraying production device for steel structures according to claim 5 is characterized in that: An air delivery pipe (30) is fixed to the two extension rods (24), one end of the air delivery pipe (30) is in communication with the air bag (32), and the air delivery pipe (30) is in communication with the first sleeve (25).

7. The automatic spraying production device for steel structures according to claim 1 is characterized in that: A guide boss (101) for contacting the first rolling ball (29) is fixed on the spraying workbench (1).

8. The automatic spraying production device for steel structures according to claim 1 is characterized in that: A heat dryer (38) for drying the steel structure (23) is installed on the spraying workbench (1), and a sprayer (39) is installed on the heat dryer (38).

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