Automatic steel bar spraying device

Abstract

The present application relates to the technical field of steel bar production and manufacturing, and in particular to an automatic steel bar spraying device, comprising a frame, a feeding assembly, an arc spraying assembly, a coating spraying assembly, and a drying assembly. A limiting plate is fixedly connected to the frame, and the feeding assembly comprises a feeding conveying roller and a driving member. The feeding conveying roller is rotatably connected to the frame, and the driving member is used to drive the feeding conveying roller to rotate. The surface of the feeding conveying roller is provided with rotating stripes, and the rotating stripes are spirally arranged around the surface of the feeding conveying roller. The arc spraying assembly, the coating spraying assembly, and the drying assembly are arranged in sequence along the feeding direction of the feeding assembly. By utilizing the rotating stripes on the feeding conveying roller, the feeding conveying roller can drive the long steel bar to rotate around its own axis during the conveying process, so that the arc spraying assembly and the coating spraying assembly can spray the long steel bar with a more uniform thickness. The present application has the effect of making the spraying thickness of the long steel bar more uniform.

Description

Technical Field

[0001] The present application relates to the technical field of steel bar production and manufacturing, and in particular to an automatic steel bar spraying device. Background Art

[0002] Rebar spraying is the process of applying a coating to the surface of rebar to protect it from corrosion or provide other specific properties. Rebar spraying includes arc spraying and coating spraying. Arc spraying uses an electric arc to generate high temperatures to melt a metal wire or coating material, which is then sprayed at high speed onto the rebar surface to improve its performance, extend its service life, and provide protection. Coating spraying involves spraying a coating material onto the surface of the rebar to improve its performance, appearance, or provide specific protection.

[0003] At present, in the automatic spraying of long steel bars, conveyor rollers are usually used to convey the long steel bars along the length direction to the spraying device, and then the conveyed long steel bars are sprayed using the spraying device. The sprayed long steel bars are dried using a drying device, and then the long steel bars are conveyed using conveyor rollers.

[0004] Regarding the above-mentioned related technologies, the long steel bars only move along their own length direction under the conveyance of the conveyor rollers, and the spraying device only sprays the upper and lower surfaces of the long steel bars during the spraying process, resulting in a thicker spray thickness on the upper and lower sides of the long steel bars, while the spray thickness on the left and right sides of the long steel bars is thinner, which in turn leads to the problem of uneven spray thickness of the long steel bars by the spraying device. Summary of the Invention

[0005] In order to make the spraying thickness of long steel bars more uniform, the present application provides an automatic steel bar spraying device.

[0006] The present application provides an automatic steel bar spraying device that adopts the following technical solutions:

[0007] An automatic steel bar spraying device, comprising:

[0008] A frame, to which limiting members are fixedly connected, the limiting members being located on both sides of the long steel bar for limiting the position of the long steel bar;

[0009] A feed assembly includes a feed conveyor roller and a feed drive, wherein a plurality of the feed conveyor rollers are provided, the plurality of the feed conveyor rollers are arranged parallel to each other, and the plurality of the feed conveyor rollers are rotatably connected to the frame, the feed drive is used to drive the feed conveyor rollers to rotate, and the surface of the feed conveyor roller is provided with rotation stripes, and the rotation stripes are spirally arranged around the surface of the feed conveyor roller;

[0010] an arc spraying assembly installed in the feeding direction of the feed assembly, the arc spraying assembly comprising an arc conveyor and an arc spray gun, the arc conveyor being used to convey the arc spray gun in a feeding direction perpendicular to the feed assembly;

[0011] a coating spraying assembly, mounted on a side of the arc spraying assembly away from the feed assembly, the coating spraying assembly comprising a coating conveying member and a coating spray gun, the coating conveying member being used to convey the coating spray gun in a feeding direction perpendicular to the feed assembly;

[0012] The drying component is installed on a side of the coating spraying component away from the coating spraying component, and is used for drying the coating sprayed on the long steel bar by the coating spraying component.

[0013] By adopting the above technical solution, the feed conveyor roller and the feed drive of the feed assembly are used to sequentially pass the long steel bars through the arc spraying assembly, the coating spraying assembly, and the drying assembly for processing. During the conveying process, the spiral rotating stripes of the feed conveyor roller rub against the long steel bars, so that the rotating stripes drive the long steel bars to rotate along their own axis, so that the long steel bars can be sprayed more evenly when they are in the arc spraying assembly and the coating spraying assembly, and it is also convenient for the long steel bars to be dried in the drying assembly.

[0014] At the same time, the arc conveyor drives the arc spray gun to move back and forth, and the coating conveyor drives the coating spray gun to move back and forth, so that the arc spray gun and the coating spray gun can cover the surface of the long steel bar more fully, avoiding the existence of blind areas of spraying, thereby making the spraying thickness of the arc spray gun and the coating spray gun more uniform.

[0015] By utilizing the rotating stripes on the feed conveyor roller, the feed conveyor roller can not only drive the long steel bars to feed along their own length direction during the conveying process, but also drive the long steel bars to rotate around their own axis direction, so that the arc spraying component and the coating spraying component can spray the long steel bars with a more uniform thickness.

[0016] Optionally, a discharge conveying roller is installed on the side of the drying component away from the coating spraying component, and a guide component is installed on the side of the discharge conveying roller close to the drying component, and the guide component is used to guide the end of the long steel bar to the discharge conveying roller.

[0017] By adopting the above technical solution, in order to make the coating spraying assembly spray more evenly, the long steel bars cannot be supported when the coating spraying assembly is spraying them. At the same time, the coating on the long steel bars in the drying assembly is not dry and is not convenient for support.

[0018] When the end of the long steel bar is located in the coating spraying assembly and the drying assembly, the end of the long steel bar will fall down due to the influence of gravity. In order to keep the long steel bar in a horizontal state during processing, the guide assembly is used to overlap the end of the long steel bar on the discharge conveyor roller.

[0019] The guide assembly is used to guide the long steel bars with the ends falling down to the discharging conveyor rollers, so that the long steel bars can be kept in a horizontal state during the subsequent spraying and drying.

[0020] Optionally, the guide assembly includes a guide convex roller, which is rotatably connected to the frame, and the axis of the guide convex roller is located below the axis of the discharge conveying roller. When the ridge of the guide convex roller rotates to the upper limit position, the upper surface of the guide convex roller is higher than the upper surface of the discharge conveying roller, or the upper surface of the guide convex roller is flush with the upper surface of the discharge conveying roller.

[0021] By adopting the above technical solution, when the end of the long steel bar is conveyed to the guide convex roller, the guide convex roller rotates to the lowest side, and then the guide convex roller rotates toward one side of the long steel bar to gradually lift the end of the long steel bar until the end of the long steel bar is no lower than the upper surface of the discharging conveying roller, so that the long steel bar can be smoothly overlapped on the discharging conveying roller during the conveying process.

[0022] Optionally, the guide assembly includes a plurality of guide convex rollers, which are arranged in a stepped manner, and a guide driving member is connected to the guide convex roller, and the guide driving member is used to drive the guide convex roller to rotate, and when the guide convex roller located below rotates to the highest point of the ridge, the uppermost end of the guide convex roller located below is higher than or parallel to the uppermost end of the adjacent guide convex roller.

[0023] By adopting the above technical solution, multiple guide convex rollers are used in a stepped relay to gradually transfer the end of the long steel bar to the upper surface of the discharge conveyor roller, so that the guide component has the effect of taking on long steel bars with larger bending amplitudes.

[0024] Optionally, when the ridges on two adjacent guide convex rollers rotate to their closest positions, the distance between the two adjacent guide convex rollers is smaller than the diameter of the long steel bar.

[0025] By adopting the above technical solution, when the two guide rollers rotate to the closest position, the long steel bars on the lower guide roller are smoothly transferred to the upper guide roller, preventing the long steel bars from passing through the gap between the two adjacent guide rollers.

[0026] Optionally, the number of ridges on the guide convex roller is set to one, and the guide driving member synchronously drives the multiple guide convex rollers to rotate synchronously, and the rotation angles of adjacent guide convex rollers differ by 180°.

[0027] By adopting the above technical solution, a plurality of guide convex rollers are synchronously driven to rotate by using the same driving source, and the long steel bars can be smoothly transferred during the rotation.

[0028] Optionally, an elastic protective layer is installed on the guide convex roller, and the elastic protective layer is used to reduce the collision between the guide convex roller and the long steel bar.

[0029] By adopting the above technical solution, the provision of the elastic protective layer reduces the damage to the guide convex roller caused by the collision of the long steel bars, thereby extending the service life of the guide convex roller.

[0030] Optionally, a pressing member is installed on the frame, and the pressing member is located on a side of the feeding assembly close to the arc spraying assembly, and the pressing member is used to limit the long steel bars on the feeding conveying roller.

[0031] By adopting this technical solution, the installation of the clamping member reduces the tendency of the long rebar ends to bend downward when passing through the coating spray assembly and drying assembly, resulting in the rebar warping near the feed assembly. At the same time, the clamping member allows the long rebar to fit more closely with the feed roller, making the feed of the long rebar driven by the feed roller and the rotation of the long rebar by the rotating strips more stable.

[0032] Optionally, the clamping member includes a pressing plate, and a guiding slope is provided on a side of the pressing plate away from the arc spraying assembly, and the guiding slope is arranged toward the feed conveying roller so that the long steel bar is passed between the pressing plate and the feed conveying roller.

[0033] By adopting the above technical solution, the setting of the guiding slope makes it easier for the feeding assembly to convey the long steel bars, and the long steel bars can be smoothly passed between the pressing plate and the feeding conveying roller.

[0034] Optionally, two groups of arc spray guns are provided, wherein one group of arc spray guns is located on the upper side of the long steel bar, and the other group of arc spray guns is located on the lower side of the long steel bar, and the arc spray guns on the upper and lower sides are staggered on the vertical plane.

[0035] By adopting the above technical solution and utilizing the upper and lower groups of arc spray guns that are staggered with each other, the influence of the metal coating sprayed by the upper and lower groups of arc spray guns on the other group of arc spray guns is reduced.

[0036] 1. Through the coordination of the frame, conveyor rollers, feed drive, rotating stripes, arc spraying assembly, coating spraying assembly and drying assembly, the long steel bar can rotate around its own axis during the spraying process, so that the arc spraying assembly and coating spraying assembly spray more evenly, and the drying assembly dries more evenly, thereby achieving the effect of more uniform spray thickness of the long steel bar;

[0037] 2. Multiple guide rollers are arranged in a stepped manner, and the ends of the long steel bars are gradually transferred to the upper surface of the discharge conveyor roller by utilizing the stepped relay of the multiple guide rollers, so that the guide assembly can bear the effect of long steel bars with larger bending amplitudes;

[0038] 3. Through the coordination of the frame, conveyor roller, rotating stripes and pressure plate, the situation in which the ends of the long steel bars bend downward when passing through the coating spraying assembly and the drying assembly, resulting in the steel bars near the feeding assembly being lifted, is reduced. At the same time, the pressure plate enables the long steel bars to fit more closely with the feeding conveyor roller, making it more stable when the feeding conveyor roller drives the long steel bars to feed or the rotating stripes drive the long steel bars to rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a structural diagram of an automatic steel bar spraying device in Example 1 of the present application.

[0040] Figure 2 It is a partial schematic diagram of the feed assembly in Example 1 of the present application.

[0041] Figure 3 This is a partial schematic diagram of a steel bar automatic spraying device in Example 1 of the present application, in which the dust removal hood and exhaust gas hood are hidden.

[0042] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0043] Figure 5 yes Figure 3 Enlarged view of point B in the middle.

[0044] Figure 6 yes Figure 3 Cross-sectional view at CC.

[0045] Figure 7 yes Figure 6 Enlarged view of point D in the middle.

[0046] Figure 8 It is a partial schematic diagram of the feed assembly in Example 2 of the present application.

[0047] Description of reference numerals:

[0048] 1. Frame; 11. Limiting member; 2. Feed assembly; 21. Feed conveyor roller; 22. Feed drive member; 221. Drive gear; 222. Drive toothed belt; 223. Feed drive motor; 23. Rotating stripes; 3. Arc spray assembly; 31. Arc conveyor member; 311. Fixed block; 312. Threaded rod; 313. Guide rod; 314. Arc drive motor; 32. Arc spray gun; 33. Dust hood; 34. Dust collector; 4. Coating spray assembly; 41. Coating conveyor member; 42. Coating spray gun; 43. Exhaust hood; 44. Exhaust gas treatment device; 5. Drying assembly; 6. Pressing member; 61. Pressing plate; 62. Guide ramp; 7. Discharge conveyor roller; 8. Guide assembly; 81. Guide convex roller; 82. Guide drive member; 83. Elastic protective layer. DETAILED DESCRIPTION

[0049] The following is combined with Figure 1-8 This application is described in further detail.

[0050] The embodiment of the present application discloses an automatic steel bar spraying device.

[0051] Example 1

[0052] Reference Figure 1 and Figure 2 An automatic steel bar spraying device includes a frame 1, a feeding assembly 2, an arc spraying assembly 3, a coating spraying assembly 4, and a drying assembly 5. A limiting member 11 is fixedly connected to the frame 1. The feeding assembly 2 includes a plurality of feeding rollers 21 and a feeding drive 22. The plurality of feeding rollers 21 are rotatably connected to the frame 1. The feeding drive 22 is used to drive the feeding rollers 21 to rotate. The surface of the feeding rollers 21 is provided with rotating stripes 23, and the rotating stripes 23 are spirally arranged around the surface of the feeding rollers 21. The arc spraying assembly 3, the coating spraying assembly 4, and the drying assembly 5 are arranged in sequence along the feeding direction of the feeding assembly 2. By utilizing the rotating stripes 23 on the feeding rollers 21, the feeding rollers 21 can not only drive the long steel bars to feed along their own length direction during the feeding process, but also drive the long steel bars to rotate around their own axis direction, so that the arc spraying assembly 3 and the coating spraying assembly 4 spray thickness on the long steel bars is more uniform.

[0053] For example, publication number CN219664174U provides a steel bar surface spraying device, and publication number CN203678648U discloses a steel bar spraying transmission wheel set and a steel bar spraying transmission mechanism. In these technologies, the steel bars cannot rotate, which easily causes uneven coating thickness.

[0054] At the same time, publication number CN212335267U discloses a production line layout structure for producing thermally sprayed metal-coated steel bars. The thermal spray guns are arranged around the longitudinal section of the production line. This technology minimizes the ineffective area of ​​the components sprayed by the thermal spray guns on the top, bottom, left, and right sides of the production line to increase the effective spraying area. Since the steel bars and the thermal spray guns are fixed, it is difficult to achieve uniform spraying no matter how the guns are arranged around them. Too many guns will also cause a significant decrease in wire deposition efficiency. The fulcrum position of the steel bars cannot be sprayed and must be repaired later.

[0055] In this embodiment, the limiting member 11 is a limiting plate, the length direction of which is perpendicular to the length direction of the feed conveyor roller 21. Multiple limiting plates are provided, and the limiting plates are arranged in parallel. The spacing between adjacent limiting plates is slightly wider than the diameter of the long steel bar. Depending on the diameter of the long steel bar, the spacing between adjacent limiting plates is generally controlled to be between 1.1 and 1.5 times the diameter of the long steel bar. When the diameter of the long steel bar is large, the spacing between adjacent limiting plates is 1.1 times the diameter of the long steel bar; when the diameter of the long steel bar is small, the spacing between adjacent limiting plates is 1.5 times the diameter of the long steel bar. In this embodiment, the spacing between adjacent limiting plates is 1.1 times the diameter of the long steel bar. The limiting plates limit the long steel bar and reduce the left and right shaking of the long steel bar when the rotating stripes 23 drive it to rotate.

[0056] By utilizing the separation of multiple limit plates, the feeding assembly 2 can simultaneously transport multiple long steel bars, and the arc spraying assembly 3, the coating spraying assembly 4, and the drying assembly 5 can simultaneously process multiple long steel bars, thereby improving the processing efficiency of the long steel bars.

[0057] In this embodiment, the feed drive 22 includes a drive gear 221 , a drive belt 222 and a feed drive motor 223 . In other embodiments, the feed drive 22 may also be driven by drive teeth and a drive chain.

[0058] Each feed conveying roller 21 is fixedly connected to a drive gear 221, and the drive toothed belt 222 is sleeved on the two drive gears 221 at the end and meshes with the other drive gears 221. The output shaft of the drive motor is fixedly connected to one of the feed conveying rollers 21, so that the feed drive motor 223 drives any one of the drive gears 221 to rotate, and all the drive gears 221 rotate synchronously, thereby synchronously driving all the feed conveying rollers 21 to rotate synchronously.

[0059] In this embodiment, the rotation stripes 23 are continuous threads. In other embodiments, the rotation stripes 23 can also be provided with spaced threads. The continuous threads facilitate the continuous and uniform rotation of the long steel bar.

[0060] The rotating stripes 23 are made of rubber material, and the friction between the rotating stripes 23 and the long steel bars is increased by using the rubber material, so that the long steel bars can rotate more stably.

[0061] The surface of the feed conveying roller 21 is also coated with a rubber layer, thereby increasing the friction between the feed conveying roller 21 and the long steel bar, so that the long steel bar can move stably along its own length direction.

[0062] Reference Figure 3 and Figure 4 A pressing member 6 is installed on the frame 1. In this embodiment, the pressing member 6 is a pressing plate 61. In other embodiments, the pressing member 6 can also be a pressing roller. The pressing roller is rotatably connected to the frame. The distance between the lower surface of the pressing roller and the upper surface of the feed conveying roller 21 is slightly wider than the diameter of the long steel bar, so that the pressing roller just presses the long steel bar on the feed conveying roller 21, thereby limiting the long steel bar.

[0063] The distance between the lower surface of the pressure roller and the upper surface of the feed conveyor roller 21 is also set according to the diameter of the long steel bar. According to the diameter of the long steel bar, the distance between the lower surface of the pressure roller and the upper surface of the feed conveyor roller 21 is usually controlled between 1.1 times and 1.5 times the diameter of the long steel bar. When the diameter of the long steel bar is large, the distance between the lower surface of the pressure roller and the upper surface of the feed conveyor roller 21 is 1.1 times the diameter of the long steel bar; and when the diameter of the long steel bar is small, the distance between the lower surface of the pressure roller and the upper surface of the feed conveyor roller 21 is 1.5 times the diameter of the long steel bar. In this embodiment, the distance between the lower surface of the pressure roller and the upper surface of the feed conveyor roller 21 is 1.1 times the diameter of the long steel bar.

[0064] The pressure plate 61 is fixedly connected to the frame 1 and is located on the side of the feed assembly 2 closest to the arc spray assembly 3. The pressure plate 61 is directly above the feed roller 21 closest to the arc spray assembly 3. The vertical spacing between the pressure plate 61 and the feed roller 21 is equal to the diameter of the long steel bar. The pressure plate 61 is used to press the long steel bar against the feed roller 21, thereby limiting the long steel bar's position. The pressure plate 61 ensures a closer fit between the long steel bar and the feed roller 21, ensuring greater stability when the feed roller 21 drives the long steel bar to feed, or when the rotating stripes 23 drive the long steel bar to rotate.

[0065] In an optional embodiment, a guide slope 62 is provided on the side of the pressing plate 61 away from the arc spray assembly 3. The guide slope 62 is arranged toward the feed conveyor roller 21. When the end of the long steel bar moves onto the pressing plate 61, the end of the long steel bar abuts against the guide slope 62. Then, the long steel bar is guided by the guide slope 62 and gradually passes between the pressing plate 61 and the feed conveyor roller 21. The provision of the guide slope 62 facilitates the smooth passage of the long steel bar between the pressing plate 61 and the feed conveyor roller 21.

[0066] The arc spraying assembly 3 includes an arc conveyor 31 and an arc spray gun 32. The arc conveyor 31 drives the arc spray gun 32 to move in a feeding direction perpendicular to the feeding assembly 2. The arc conveyor 31 drives the arc spray gun 32 to move, thereby increasing the spraying range of the arc spray gun 32. Not only does it enable the arc spray gun 32 to spray multiple steel bars simultaneously, thereby improving working efficiency, it also avoids the blind spot of spraying a single steel bar, making the spraying thickness of the arc spray gun 32 more uniform.

[0067] Two sets of arc spray guns 32 are provided: one set is located above the long rebar, and the other set is located below it. The two sets of arc spray guns 32 are vertically offset. This offset arrangement minimizes the effect of the metal coating sprayed from one set on the other.

[0068] The upper and lower sets of arc spray guns 32 are both tilted toward the feed assembly 2 so that the nozzles of the arc spray guns 32 are opposite to the conveying direction of the long steel bars, so that the metal coating sprayed by the arc spray guns 32 can better adhere to the long steel bars.

[0069] The angle between the nozzle of the arc spray gun 32 and the horizontal plane is between 45° and 90°. In this embodiment, the angle is between 70° and 80°, so that the spraying effect of the arc spray gun 32 is better.

[0070] In this embodiment, the arc conveying member 31 includes a fixed block 311, a threaded rod 312, a guide rod 313 and an arc driving motor 314. In other embodiments, the threaded rod 312 can also be replaced with a ball screw or a transmission chain, and the guide rod 313 can also be replaced with a combination of a guide block and a guide rail.

[0071] In this embodiment, the arc drive motor 314 is fixedly connected to the frame 1, so when the arc drive motor 314 is driven, the arc drive motor 314 does not move. At the same time, the power supply of the arc spray gun 32 is also an external power supply, so the power supply does not move.

[0072] The threaded rod 312 is rotatably connected to the frame 1, and the threaded rod 312 is horizontally arranged. The length direction of the threaded rod 312 is perpendicular to the feeding direction of the feeding assembly 2. The arc drive motor 314 is coaxially fixedly connected to the threaded rod 312, so that the arc drive motor 314 drives the threaded rod 312 to rotate.

[0073] The guide rod 313 is fixedly connected to the frame 1, the threaded rod 312 is arranged parallel to the guide rod 313, the fixed block 311 is threadedly connected to the threaded rod 312, and the fixed block 311 is also slidably connected to the guide rod 313. The arc spray gun 32 is fixedly connected to the fixed block 311. In this embodiment, two arc spray guns 32 are fixedly connected to each fixed block 311. In other embodiments, one, three, or four arc spray guns 32 can also be provided.

[0074] The arc driving motor 314 is used to drive the threaded rod 312 to rotate, thereby driving the fixing block 311 to move along the length direction of the guide rod 313 , and further driving the arc spray gun 32 to move along the length direction of the guide rod 313 .

[0075] Reference Figure 1 A dust cover 33 is provided on the arc spraying assembly 3, and a dust collector 34 is connected to one side of the dust cover 33. The dust generated by the arc spray gun 32 is extracted by the cooperation of the dust cover 33 and the dust collector 34, thereby reducing the impact of the dust on the subsequent long steel bar spraying.

[0076] Since the metal coating cools down quickly, a splicing roller is provided between the arc spraying assembly 3 and the coating spraying assembly 4. The splicing roller is used to splice the long steel bars after arc spraying. The end of the splicing roller is also fixedly connected to a driving gear 221. The driving toothed belt 222 is sleeved on the splicing roller on the splicing roller, so that the splicing roller can also move synchronously with the feed conveying roller 21.

[0077] Reference Figure 3 The coating spraying assembly 4 includes a coating conveying member 41 and a coating spray gun 42. The coating conveying member 41 drives the coating spray gun 42 to move in a feeding direction perpendicular to the feeding assembly 2. The coating conveying member 41 drives the coating spray gun 42 to move, thereby increasing the spraying range of the coating spray gun 42. Not only does the coating spray gun 42 enable multiple long steel bars to be sprayed at the same time, thereby improving the working efficiency, but it also avoids the spraying blind area of ​​a single long steel bar, thereby making the spraying thickness of the coating spray gun 42 more uniform.

[0078] Two groups of coating spray guns 42 are provided, one group of coating spray guns 42 is located on the upper side of the long steel bar, and the other group of coating spray guns 42 is located on the lower side of the long steel bar. In this embodiment, the upper and lower coating spray guns 42 are located on the same vertical plane. In other embodiments, they can also be located on different vertical planes.

[0079] In this embodiment, the coating transport member 41 has the same structure as the arc transport member 31 , so the coating transport member 41 will not be described in detail in this embodiment.

[0080] Reference Figure 1An exhaust hood 43 is provided on the coating spraying assembly 4, and one side of the exhaust hood 43 is connected to an exhaust gas treatment device 44. The exhaust gas treatment device 44 in this embodiment is an organic exhaust gas treatment device 44. The exhaust hood 43 and the exhaust gas treatment device 44 cooperate to treat the exhaust gas from the coating spraying, thereby reducing the impact of the exhaust gas on the environment.

[0081] The drying assembly 5 comprises a hot air circulation fan and a heat exchanger, both of which are fixedly connected to the frame 1 . The long steel bars passing through the drying assembly 5 are dried by the cooperation of the hot air circulation fan and the heat exchanger.

[0082] The drying component 5 is also covered with an exhaust hood 43, which covers the hot air circulation fan and the heat exchanger. The exhaust hood 43 on the drying component 5 is also connected to the exhaust gas treatment device 44, so that the exhaust gas emitted by the coating spraying component 4 that has not dried can also be treated, further reducing the impact of the exhaust gas on the environment.

[0083] In order to make the coating spraying assembly 4 spray more evenly, the long steel bar cannot be supported when the coating spraying assembly 4 is spraying the long steel bar. At the same time, the coating on the long steel bar located in the drying assembly 5 is not dry, which makes it difficult to support. When the end of the long steel bar is located in the coating spraying assembly 4 and the drying assembly 5, the end of the long steel bar will fall downward under the influence of gravity. At this time, the part of the long steel bar located in the feeding assembly 2 is prone to warping. Therefore, the setting of the pressure plate 61 can also reduce the situation in which the end of the long steel bar bends downward when passing through the coating spraying assembly 4 and the drying assembly 5, causing the steel bar near the feeding assembly 2 to warp.

[0084] Reference Figure 1 and Figure 5 In order to keep the long steel bars in a horizontal state during processing, a discharging conveying roller 7 is installed on the side of the drying component 5 away from the coating spraying component 4, and a guide component 8 is installed on the side of the discharging conveying roller 7 close to the drying component 5.

[0085] The structure of the discharge conveyor roller 7 is consistent with that of the feed conveyor roller 21, and the upper surface of the discharge conveyor roller 7 is located on the same horizontal plane as the upper surface of the feed conveyor roller 21, so that the long steel bars overlapped on the feed conveyor roller 21 and the discharge conveyor roller 7 are in a horizontal position, and the driving member also synchronously drives the discharge conveyor roller 7 to move, so that the discharge conveyor roller 7 and the long steel bars on the feed conveyor roller 21 maintain synchronous movement.

[0086] The guide assembly 8 is used to guide the end of the long steel bar to the discharge conveyor roller 7. The guide assembly 8 is used to guide the long steel bar with the end falling to the discharge conveyor roller 7, so that the long steel bar is kept in a horizontal state during subsequent spraying and drying.

[0087] For example, publication number CN203664089U discloses a rebar spraying system with a straightening guide plate. To overcome the drawback of existing rebar spraying equipment, where the front ends of epoxy-coated rebar sag due to gravity and require manual straightening, the system incorporates an inclined guide plate to straighten the sagging rebar, allowing the front ends of the rebar to be smoothly delivered from the discharge port and placed on the discharge assembly. Sharp rebar ends or excessive friction on the guide plate surface can make it difficult to guide the rebar to the discharge port.

[0088] In order to overcome the difficulty in guiding the steel bars due to the sharp ends of the steel bars or the large friction resistance on the surface of the guide plate, the guide assembly 8 includes a guide convex roller 81. The cross-section of the guide convex roller 81 can be a double arc cam or a single arc cam. In this embodiment, a single arc cam is used, and the most protruding side of the single arc cam is a convex ridge.

[0089] One or more guide convex rollers 81 can be provided. If there is a single guide convex roller 81, the rotation of the guide convex roller 81 is connected to the frame 1, and the axis of rotation of the guide convex roller 81 is parallel to the axis of the discharge conveyor roller 7. The rotation axis of the guide convex roller 81 is located below the rotation axis of the discharge conveyor roller 7. When the guide convex roller 81 rotates to the upper limit position, the upper surface of the guide convex roller 81 is higher than the upper surface of the discharge conveyor roller 7, or the upper surface of the guide convex roller 81 is flush with the upper surface of the discharge conveyor roller 7.

[0090] When the end of the long steel bar is conveyed to the guide convex roller 81, the guide convex roller 81 rotates to the lowest side, and then the guide convex roller 81 rotates toward one side of the long steel bar to gradually lift the end of the long steel bar until the end of the long steel bar is no lower than the upper surface of the discharge conveying roller 7, so that the long steel bar can be smoothly overlapped on the discharge conveying roller 7 during the conveying process.

[0091] However, the bending degree of the long steel bar guided by a single guide convex roller 81 is limited, so multiple guide convex rollers 81 can be provided for relay adjustment, thereby improving the effect of the guide assembly 8 in taking on long steel bars with larger bending amplitudes.

[0092] Reference Figure 6 and Figure 7 In this embodiment, four guide convex rollers 81 are provided. In other embodiments, the number of guide convex rollers 81 can be adjusted according to the bending degree of the long steel bar, for example, two, three, five, etc.

[0093] The four guide convex rollers 81 are arranged in a stepped manner, and a guide drive member 82 is connected between the four guide convex rollers 81. The guide drive member 82 in this embodiment is a guide drive motor and a guide toothed belt. The guide drive motor is coaxially fixedly connected to one of the guide convex rollers 81, and the guide toothed belt is engaged with the ends of the four guide convex rollers 81, so that when the guide drive motor drives any one of the guide convex rollers 81 to rotate, the four guide convex rollers 81 can rotate simultaneously.

[0094] The guide driving member 82 is used to synchronously drive the guide convex roller 81 to rotate. When the guide convex roller 81 located at the bottom rotates to the highest point, the uppermost end of the guide convex roller 81 located at the bottom is higher than or parallel to the uppermost end of the guide convex roller 81 at the adjacent upper end. In this embodiment, the rotation angles of adjacent guide convex rollers 81 differ by 180°, and when the guide convex roller 81 located at the bottom rotates to the highest point, the highest point of the guide convex roller 81 located at the bottom is flush with the highest point of the guide convex roller 81 located on the square.

[0095] By utilizing the stepped relay of the four guide convex rollers 81 , the ends of the long steel bars are gradually transferred to the upper surface of the discharge conveying roller 7 , so that the guide assembly 8 has the effect of receiving long steel bars with a larger bending amplitude.

[0096] In an alternative embodiment, when the ridges on two adjacent guide rollers 81 rotate to their closest position, the distance between the two adjacent guide rollers 81 is less than the diameter of the long steel bar. In this embodiment, when the two adjacent guide rollers 81 rotate to their closest position, the two adjacent guide rollers 81 are tangent to each other. This tangent connection between the two guide rollers 81 allows the long steel bar on the lower guide roller 81 to smoothly transition to the upper guide roller 81.

[0097] The guide roller 81 is fitted with an elastic protective layer 83, made of rubber and adhered to the convex side of the roller. This layer reduces damage to the roller 81 caused by collisions with the long rebar, thereby extending the roller's service life. The rubber material also increases friction between the rebar and the guide roller 81, allowing the roller 81 to effectively lift the bent end of the rebar.

[0098] Since the elastic protective layer 83 is arranged by adhesion, the elastic protective layer 83 can be replaced after being damaged.

[0099] The implementation principle of an automatic steel bar spraying device in an embodiment of the present application is: the long steel bars are transported by using the feed conveying roller 21 and the driving member of the feed assembly 2. First, the long steel bars are passed between the pressure plate 61 and the feed conveying roller 21. Due to the rotation of the feed conveying roller 21, the long steel bars are fed along their own length direction. At the same time, the friction between the rotating stripes 23 and the long steel bars causes the long steel bars to rotate along their own axial direction.

[0100] When the end of the long steel bar passes through the arc spraying assembly 3, the arc spray gun 32 sprays the metal coating on the surface of the long steel bar, and then the long steel bar is overlapped on the overlapping roller. Then the long steel bar is passed into the coating spraying assembly 4, and the coating spray gun 42 sprays the coating on the surface of the long steel bar. Then the long steel bar continues to move into the drying assembly 5, and the drying assembly 5 dries the surface of the long steel bar. Then, multiple guide convex rollers 81 guide the bent end of the long steel bar to the discharge conveying roller 7. At this time, the long steel bar as a whole remains in a horizontal state.

[0101] The rotating stripes 23 and the pressure plate 61 enable the long steel bars to rotate around their own axis for transportation. At the same time, the guide roller 81 guides the ends of the long steel bars to a horizontal position, so that the arc spraying assembly 3 and the coating spraying assembly 4 spray thickness of the long steel bars is more uniform.

[0102] Example 2

[0103] Reference Figure 8 The difference between Example 2 and Example 1 is that the limiting member 11 is a limiting roller, and the limiting roller and the feed conveying roller 21 are arranged at intervals. A limiting roller can be set for every feed conveying roller 21, or a limiting roller can be set for every multiple feed conveying rollers 21. In this embodiment, a limiting roller is set for every two feed conveying rollers 21.

[0104] The diameter of the limiting roller is larger than that of the feed conveyor roller 21. It is provided with limiting slots, the number of which is adaptively set based on the number of long bars to be processed. The width of the limiting slots is equal to the diameter of the long bars. The limiting slots are used to accommodate the long bars. By limiting the long bars, the limiting slots reduce the possibility of the rotating stripes 23 converging toward one side, allowing the long bars to be transported stably along their length.

[0105] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An automatic steel bar spraying device, characterized in that: include: A frame (1), wherein a limiting member (11) is fixedly connected to the frame (1), and the limiting member (11) is located on both sides of the long steel bar to limit the long steel bar; A feed assembly (2) includes a feed conveying roller (21) and a feed driving member (22), wherein a plurality of the feed conveying rollers (21) are provided, the plurality of the feed conveying rollers (21) are arranged parallel to each other, and the plurality of the feed conveying rollers (21) are rotatably connected to the frame (1), the feed driving member (22) is used to drive the feed conveying rollers (21) to rotate, and the surface of the feed conveying rollers (21) is provided with rotation stripes (23), and the rotation stripes (23) are spirally arranged around the surface of the feed conveying rollers (21); An arc spraying assembly (3) is installed in the feeding direction of the feed assembly (2), the arc spraying assembly (3) comprising an arc conveying member (31) and an arc spray gun (32), the arc conveying member (31) being used to convey the arc spray gun (32) in a feeding direction perpendicular to the feed assembly (2); a coating spraying assembly (4) mounted on a side of the arc spraying assembly (3) away from the feed assembly (2), the coating spraying assembly (4) comprising a coating conveying member (41) and a coating spray gun (42), the coating conveying member (41) being used to convey the coating spray gun (42) in a feeding direction perpendicular to the feed assembly (2); A drying assembly (5) is installed on a side of the coating spraying assembly (4) away from the coating spraying assembly (4), and the drying assembly (5) is used to dry the coating sprayed on the long steel bar by the coating spraying assembly (4); a discharge conveying roller (7) is also installed on the side of the drying assembly (5) away from the coating spraying assembly (4), and the upper surface of the discharge conveying roller (7) and the upper surface of the feed conveying roller (21) are located at the same horizontal position; a guide assembly (8) is installed on the side of the discharge conveying roller (7) close to the drying assembly (5), and the guide assembly (8) is used to guide the end of the long steel bar to the discharge conveying roller (7); the guide assembly (8) includes a guide The guide convex roller (81) is rotatably connected to the frame (1), the axis of the guide convex roller (81) is located below the axis of the discharge conveying roller (7), and when the ridge of the guide convex roller (81) rotates to the uppermost position, the upper surface of the guide convex roller (81) is higher than the upper surface of the discharge conveying roller (7), or the upper surface of the guide convex roller (81) is flush with the upper surface of the discharge conveying roller (7); and a pressing member (6) is installed on the frame (1), the pressing member (6) is located on a side of the feed assembly (2) close to the arc spraying assembly (3), and the pressing member (6) is used to limit the long steel bar on the feed conveying roller (21).

2. The automatic steel bar spraying device according to claim 1, characterized in that: The guide assembly (8) includes a plurality of guide convex rollers (81), and the plurality of guide convex rollers (81) are arranged in a stepped manner. The guide convex rollers (81) are connected to guide drive members (82), and the guide drive members (82) are used to drive the guide convex rollers (81) to rotate, and when the guide convex roller (81) located at the bottom rotates to the highest point of the ridge, the uppermost end of the guide convex roller (81) located at the bottom is higher than or parallel to the uppermost end of the adjacent guide convex roller (81) above.

3. The automatic steel bar spraying device according to claim 2, characterized in that: When the ridges on two adjacent guide convex rollers (81) rotate to their closest positions, the distance between the two adjacent guide convex rollers (81) is smaller than the diameter of the long steel bar.

4. The automatic steel bar spraying device according to claim 3, characterized in that: The number of ridges on the guide convex roller (81) is set to one, and the guide driving member (82) synchronously drives the plurality of guide convex rollers (81) to rotate synchronously, and the rotation angles of adjacent guide convex rollers (81) differ by 180°.

5. The automatic steel bar spraying device according to any one of claims 1 to 4, characterized in that: An elastic protective layer (83) is installed on the guide convex roller (81), and the elastic protective layer (83) is used to reduce the collision between the guide convex roller (81) and the long steel bar.

6. The automatic steel bar spraying device according to claim 1, characterized in that: The pressing member (6) comprises a pressing plate (61), and a guiding slope (62) is provided on a side of the pressing plate (61) away from the arc spraying assembly (3), and the guiding slope (62) is arranged toward the feeding conveying roller (21) so that the long steel bar is passed between the pressing plate (61) and the feeding conveying roller (21).

7. The automatic steel bar spraying device according to claim 1, characterized in that: Two groups of arc spray guns (32) are provided, wherein one group of arc spray guns (32) is located on the upper side of the long steel bar, and the other group of arc spray guns (32) is located on the lower side of the long steel bar, and the arc spray guns (32) on the upper and lower sides are staggered on the vertical plane.

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