Automatic uniform zinc spraying device

Abstract

The application discloses an automatic and uniform zinc spraying device, which comprises a zinc spraying chamber, a workpiece clamping and rotating mechanism, a spraying gun moving mechanism, a zinc spraying gun assembly, a distance detecting module, a distance adjusting mechanism and a control module. The workpiece clamping and rotating mechanism is used for clamping and rotating the workpiece, and the spraying gun moving mechanism is used for driving the zinc spraying gun assembly to reciprocate along the length direction of the workpiece. The distance detecting module detects the zinc spraying distance between the nozzle and the surface of the workpiece, and the control module controls the distance adjusting mechanism to adjust the position of the zinc spraying gun assembly according to the detection result, so that the zinc spraying distance is kept within a preset range. The rotating speed and the moving speed can be determined according to the outer diameter of the workpiece, the spraying width and a preset lap joint ratio, and corresponding zinc spraying parameters are adopted for different sections. The device is favorable for improving the thickness consistency of the zinc spraying layer.

Description

Technical Field

[0001] This invention relates to the technical field of metal surface anti-corrosion treatment equipment, specifically to an automatic uniform zinc spraying device. Background Technology

[0002] Zinc spraying is a common method of metal surface corrosion protection. It typically involves spraying molten zinc or zinc powder onto the workpiece surface using a zinc spray gun, forming a zinc layer to improve the workpiece's corrosion resistance. Zinc spraying can be applied to the surface protection of steel structural components, pipes, rods, and mechanical parts.

[0003] In existing zinc spraying operations, some equipment uses manual hand-held spray guns or semi-automatic spray gun movement for spraying. In this method, the distance between the spray gun and the workpiece surface, the spray gun's movement speed, and the spraying path mainly rely on manual experience or control by a single motion mechanism, which easily leads to situations where the zinc layer is locally too thick, too thin, or discontinuous. Especially when zinc spraying pipes, shafts, or other workpieces requiring circumferential spraying, if the spray gun's movement speed along the workpiece's length is not coordinated with the workpiece's rotation speed, it can easily result in insufficient overlap or repeated accumulation between adjacent zinc spraying paths.

[0004] Furthermore, the outer diameter, length, or surface position of the workpiece to be zinc-sprayed may vary, and the distance between the zinc spray gun nozzle and the workpiece surface is prone to change during the zinc spraying process. If the spraying distance is too large, the adhesion efficiency of zinc powder or zinc particles will decrease; if the spraying distance is too small, it is easy to cause localized coating accumulation, affecting the consistency of the zinc layer thickness. For different areas of the workpiece, such as the ends and the middle, if the same spraying parameters are used, there may be insufficient spraying in the end area or uneven zinc layer in the edge area.

[0005] Therefore, there is still room for improvement in the coordinated control of workpiece rotation, spray gun movement, and spray distance adjustment in existing zinc spraying devices. Summary of the Invention

[0006] In order to solve the above-mentioned technical problems, the purpose of this invention is to provide an automatic uniform zinc spraying device to improve the problem of uneven zinc layer thickness caused by the lack of coordination between the movement of the spray gun, the rotation of the workpiece and the control of the zinc spraying distance during the zinc spraying process in existing zinc spraying devices.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] An automatic uniform zinc spraying device includes a zinc spraying chamber, a workpiece clamping and rotating mechanism, a spray gun moving mechanism, a zinc spray gun assembly, a distance detection module, a distance adjustment mechanism, and a control module. The workpiece clamping and rotating mechanism is disposed within the zinc spraying chamber and is used to clamp the workpiece to be zinc sprayed and drive it to rotate around its own axis. The spray gun moving mechanism is disposed within the zinc spraying chamber along the length direction of the workpiece to be zinc sprayed. The zinc spray gun assembly is disposed on the spray gun moving mechanism and can reciprocate along the length direction of the workpiece to be zinc sprayed under the drive of the spray gun moving mechanism. The distance detection module is used to detect the zinc spraying distance between the nozzle of the zinc spray gun assembly and the surface of the workpiece to be zinc sprayed. The distance adjustment mechanism is connected to the zinc spraying gun assembly and is used to drive the zinc spraying gun assembly to move towards or away from the surface of the workpiece to be zinc sprayed. The control module is electrically connected to the workpiece clamping and rotating mechanism, the spraying gun moving mechanism, the zinc spraying gun assembly, the distance detection module, and the distance adjustment mechanism. The control module is used to control the rotation of the workpiece to be zinc sprayed and to control the zinc spraying gun assembly to reciprocate along the length direction of the workpiece to be zinc sprayed. The control module is also used to control the action of the distance adjustment mechanism according to the zinc spraying distance detected by the distance detection module, so that the zinc spraying distance between the nozzle of the zinc spraying gun assembly and the surface of the workpiece to be zinc sprayed is kept within a preset zinc spraying distance range.

[0009] Preferably, the workpiece clamping and rotating mechanism includes a first clamping seat, a second clamping seat, and a rotating drive; the first clamping seat and the second clamping seat are disposed opposite to each other in the zinc spraying chamber for clamping both ends of the workpiece to be zinc sprayed; the rotating drive is connected to the first clamping seat and / or the second clamping seat for driving the workpiece to be zinc sprayed to rotate.

[0010] Preferably, the workpiece clamping and rotating mechanism further includes a support guide rail and an adjustable support seat; the first clamping seat and / or the second clamping seat are disposed on the support guide rail and can move along the support guide rail to adjust the distance between the first clamping seat and the second clamping seat; the adjustable support seat is disposed between the first clamping seat and the second clamping seat and is used to support zinc-sprayed workpieces of different lengths.

[0011] Preferably, the spray gun moving mechanism includes a moving guide rail, a moving slide, and a reciprocating drive; the moving guide rail is arranged along the length direction of the workpiece to be sprayed with zinc; the moving slide is slidably disposed on the moving guide rail; the zinc spray gun assembly is disposed on the moving slide; the reciprocating drive is connected to the moving slide for driving the moving slide to reciprocate along the moving guide rail.

[0012] Preferably, the adjusting mechanism includes an adjusting slide and an adjusting drive; the zinc spraying gun assembly is disposed on the adjusting slide; the adjusting drive is pulsatorically connected to the adjusting slide and is used to drive the zinc spraying gun assembly to move toward or away from the surface of the workpiece to be sprayed with zinc; the control module is used to control the adjusting drive to move the zinc spraying gun assembly away from the surface of the workpiece to be sprayed with zinc when the zinc spraying distance is less than a preset lower limit, and to control the adjusting drive to move the zinc spraying gun assembly toward the surface of the workpiece to be sprayed with zinc when the zinc spraying distance is greater than a preset upper limit.

[0013] Preferably, the control module is used to determine the rotation speed of the workpiece clamping and rotating mechanism and the moving speed of the spray gun moving mechanism based on the outer diameter or equivalent spray width of the workpiece to be sprayed with zinc, the spray width of the zinc spray gun assembly and the preset overlap ratio, so that the zinc spray gun assembly forms a zinc spraying path on the surface of the workpiece to be sprayed with zinc in which adjacent zinc spraying trajectories overlap.

[0014] Preferably, the control module is used to divide the zinc spraying area of ​​the workpiece to be zinc sprayed into a first end section, a middle section and a second end section, and control the zinc spraying gun assembly to spray zinc in the first end section, the middle section and the second end section respectively using corresponding zinc spraying parameters; the zinc spraying parameters include at least one of zinc spraying gun moving speed, workpiece rotation speed, zinc spraying time, zinc spraying pressure, zinc supply amount and zinc spraying power.

[0015] Preferably, the automatic uniform zinc spraying device further includes a dust recovery mechanism; the dust recovery mechanism includes a negative pressure suction port, a guide plate, a filter recovery box, and a zinc collection box; the negative pressure suction port is connected to the zinc spraying chamber; the guide plate is disposed in the zinc spraying chamber to guide unattached zinc powder or zinc spraying particles to the negative pressure suction port; the filter recovery box is connected to the negative pressure suction port; the zinc collection box is detachably disposed at the lower part of the filter recovery box to collect zinc powder or zinc spraying particles separated by the filter recovery box.

[0016] The present invention has the following beneficial effects:

[0017] 1. The workpiece clamping and rotating mechanism drives the workpiece to be sprayed with zinc to rotate around its own axis, and the spray gun moving mechanism drives the zinc spray gun assembly to move back and forth along the length of the workpiece to be sprayed with zinc. This allows the zinc spray gun assembly to form a continuous zinc spraying path in the circumferential and axial directions of the workpiece to be sprayed with zinc, which can reduce the local missed spraying, repeated accumulation or discontinuous coverage that occur during manual zinc spraying or unidirectional zinc spraying.

[0018] Second, the distance detection module detects the zinc spraying distance between the nozzle of the zinc spraying gun assembly and the surface of the workpiece to be sprayed with zinc. The control module controls the distance adjustment mechanism to move the zinc spraying gun assembly closer to or further away from the surface of the workpiece to be sprayed with zinc based on the detected zinc spraying distance, so that the zinc spraying distance is kept within the preset zinc spraying distance range. This can reduce the uneven zinc spraying layer thickness caused by changes in the position of the workpiece surface, differences in the workpiece diameter, or deviations in the position of the spraying gun.

[0019] Third, the control module determines the rotation speed of the workpiece clamping and rotating mechanism and the moving speed of the spray gun moving mechanism based on the outer diameter or equivalent spray width of the workpiece to be sprayed with zinc, the spray width of the zinc spray gun assembly, and the preset overlap ratio. This ensures that adjacent zinc spraying trajectories can cover the surface of the workpiece to be sprayed with zinc according to the preset overlap relationship, which can reduce the occurrence of uncovered areas or repeated accumulation areas between adjacent zinc spraying trajectories.

[0020] Fourth, by dividing the zinc spraying area of ​​the workpiece to be zinc sprayed into a first end section, a middle section and a second end section, and controlling the zinc spraying gun assembly to use corresponding zinc spraying parameters in different zinc spraying sections, the end section and the middle section can be processed according to their respective zinc spraying requirements, which can reduce the situation of insufficient spraying in the end area or uneven local zinc spraying layer.

[0021] 5. By setting up a dust recovery mechanism, zinc powder or zinc spraying particles that do not adhere during the zinc spraying process are directed into the filter recovery box by the guide plate and negative pressure air intake, and collected through the zinc collection box. This reduces the escape of zinc powder and facilitates the centralized treatment of unattached zinc powder or zinc spraying particles. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of an automatic uniform zinc spraying device according to the present invention;

[0024] Figure 2 This is a schematic diagram of the internal structure of the zinc spraying chamber in this invention;

[0025] Figure 3 This is a schematic diagram of the cooperation structure between the workpiece clamping and rotating mechanism and the spray gun moving mechanism in this invention.

[0026] Figure 4 This is a schematic diagram of the cooperative structure of the zinc spray gun assembly, distance detection module, and distance adjustment mechanism in this invention;

[0027] Figure 5 This is a schematic diagram showing the connection relationship of the control modules in this invention;

[0028] Figure 6 This is a schematic diagram of the zinc spraying path and zinc spraying section division in this invention.

[0029] In the diagram: 1. Zinc spraying chamber; 11. Chamber body; 12. Protective door; 13. Observation window; 14. Exhaust vent; 15. Support base; 2. Workpiece clamping and rotating mechanism; 21. First clamping seat; 22. Second clamping seat; 23. Rotation drive component; 24. Support guide rail; 25. Adjustable support seat; 26. Clamping head; 3. Spray gun moving mechanism; 31. Moving guide rail; 32. Moving slide; 33. Reciprocating drive component; 34. Limiting component; 4. Zinc spray gun assembly; 41. Zinc spray gun; 42. Nozzle; 43. Zinc supply pipeline; 44. Spraying nozzle. 5. Gun mounting base; 6. Distance detection module; 7. Distance sensor; 8. Adjustment mechanism; 9. Adjustment slide; 10. Adjustment drive; 2. Adjustment guide rail; 3. Control module; 4. Controller; 5. Operation panel; 6. Parameter storage unit; 7. Dust recovery mechanism; 8. Negative pressure suction port; 9. Filter recovery box; 10. Zinc collection box; 11. Filter element; 2. Negative pressure fan; 3. Workpiece to be zinc sprayed; 4. First end section; 5. Middle section; 6. Second end section; 7. Zinc spraying trajectory. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] like Figures 1 to 6 As shown, this embodiment provides an automatic uniform zinc spraying device, including a zinc spraying chamber 1, a workpiece clamping and rotating mechanism 2, a spray gun moving mechanism 3, a zinc spray gun assembly 4, a distance detection module 5, a distance adjustment mechanism 6, and a control module 7. The workpiece clamping and rotating mechanism 2 is disposed within the zinc spraying chamber 1 and is used to clamp the workpiece 9 to be zinc sprayed and drive the workpiece 9 to rotate around its own axis. The spray gun moving mechanism 3 is disposed within the zinc spraying chamber 1 along the length direction of the workpiece 9 to be zinc sprayed. The zinc spray gun assembly 4 is disposed on the spray gun moving mechanism 3 and can reciprocate along the length direction of the workpiece 9 to be zinc sprayed under the drive of the spray gun moving mechanism 3.

[0032] The distance detection module 5 is used to detect the zinc spraying distance between the nozzle 42 of the zinc spraying gun assembly 4 and the surface of the workpiece 9 to be zinc sprayed. The distance adjustment mechanism 6 is connected to the zinc spraying gun assembly 4 and is used to drive the zinc spraying gun assembly 4 to move closer to or further away from the surface of the workpiece 9 to be zinc sprayed. The control module 7 is electrically connected to the workpiece clamping and rotating mechanism 2, the spraying gun moving mechanism 3, the zinc spraying gun assembly 4, the distance detection module 5, and the distance adjustment mechanism 6. The control module 7 is used to control the rotation of the workpiece 9 to be zinc sprayed and to control the reciprocating movement of the zinc spraying gun assembly 4 along the length direction of the workpiece 9 to be zinc sprayed; the control module 7 is also used to control the action of the distance adjustment mechanism 6 according to the zinc spraying distance detected by the distance detection module 5, so that the zinc spraying distance between the nozzle 42 of the zinc spraying gun assembly 4 and the surface of the workpiece 9 to be zinc sprayed is maintained within the preset zinc spraying distance range.

[0033] With the above settings, the workpiece 9 to be zinc-sprayed can rotate around its own axis during the zinc spraying process, and the zinc spraying gun assembly 4 can move along the length of the workpiece 9, thereby ensuring that the spraying area of ​​the zinc spraying gun assembly 4 forms a continuous coverage along the axial and circumferential directions of the workpiece 9. The distance detection module 5 and the distance adjustment mechanism 6 work together to adjust the position of the zinc spraying gun assembly 4 when the zinc spraying distance deviates, reducing the impact of changes in the zinc spraying distance on the consistency of the zinc layer thickness.

[0034] In this embodiment, the zinc spraying chamber 1 includes a chamber body 11, a protective door 12, an observation window 13, an exhaust vent 14, and a support base 15. The chamber body 11 is mounted on the support base 15, and the protective door 12 is located on one side of the chamber body 11 for opening or closing the zinc spraying chamber 1. The observation window 13 is located on the protective door 12 or the chamber body 11 for easy observation of the zinc spraying status inside the zinc spraying chamber 1. The exhaust vent 14 is connected to the dust recovery mechanism 8 and is used to draw out any unattached zinc powder or zinc spraying particles from the zinc spraying chamber 1.

[0035] The workpiece clamping and rotating mechanism 2 includes a first clamping seat 21, a second clamping seat 22, and a rotating drive 23. The first clamping seat 21 and the second clamping seat 22 are disposed opposite each other within the zinc spraying chamber 1, and are used to clamp both ends of the workpiece 9 to be zinc sprayed. The rotating drive 23 is connected to the first clamping seat 21 and the second clamping seat 22, and is used to drive the workpiece 9 to be zinc sprayed to rotate. The rotating drive 23 can be a servo motor, a stepper motor, or a speed-regulating motor. Clamping heads 26 can be respectively provided on the first clamping seat 21 and the second clamping seat 22, and the clamping heads 26 are used to cooperate with the ends of the workpiece 9 to be zinc sprayed. The clamping heads 26 can be centers, chucks, jaws, or positioning components adapted to the ends of the workpiece.

[0036] Furthermore, the workpiece clamping and rotating mechanism 2 also includes a support guide rail 24 and an adjustable support base 25. A first clamping base 21 and a second clamping base 22 are disposed on the support guide rail 24 and can move along the support guide rail 24 to adjust the distance between the first clamping base 21 and the second clamping base 22. The adjustable support base 25 is disposed between the first clamping base 21 and the second clamping base 22 to support zinc-sprayed workpieces 9 of different lengths. The adjustable support base 25 can move along the support guide rail 24 and can also adjust its support height vertically to accommodate zinc-sprayed workpieces 9 of different diameters or lengths.

[0037] The spray gun moving mechanism 3 includes a moving guide rail 31, a moving slide 32, and a reciprocating drive component 33. The moving guide rail 31 is arranged along the length of the workpiece 9 to be sprayed with zinc. The moving slide 32 is slidably mounted on the moving guide rail 31. The zinc spray gun assembly 4 is mounted on the moving slide 32. The reciprocating drive component 33 is connected to the moving slide 32 for driving the moving slide 32 to reciprocate along the moving guide rail 31. The reciprocating drive component 33 can be a lead screw drive mechanism, a synchronous belt drive mechanism, a gear and rack drive mechanism, or a linear motor. Limiting components 34 can be provided at both ends of the moving guide rail 31 to limit the movement range of the moving slide 32.

[0038] The zinc spraying gun assembly 4 includes a zinc spraying gun 41, a nozzle 42, a zinc supply line 43, and a spraying gun mounting base 44. The zinc spraying gun 41 is mounted on the spraying gun mounting base 44, and the nozzle 42 is located at the end of the zinc spraying gun 41 facing the workpiece 9 to be zinc sprayed. The zinc supply line 43 is connected to the zinc spraying gun 41 and is used to supply zinc spraying material or zinc spraying medium to the zinc spraying gun 41. The spraying gun mounting base 44 is connected to the adjusting mechanism 6, allowing the zinc spraying gun 41 to move closer to or further away from the surface of the workpiece 9 to be zinc sprayed with the adjusting mechanism 6.

[0039] The distance detection module 5 includes a distance sensor 51. The distance sensor 51 is mounted on the zinc spray gun assembly 4 or the movable slide 32, facing the surface of the workpiece 9 to be zinc sprayed, and is used to detect the zinc spraying distance between the nozzle 42 and the surface of the workpiece 9. The distance sensor 51 can be a laser rangefinder, an ultrasonic rangefinder, or other non-contact distance detection element. The detection direction of the distance sensor 51 can be parallel to the spraying direction of the nozzle 42, or it can form a preset angle with respect to the spraying direction of the nozzle 42, as long as it can reflect the distance between the nozzle 42 and the surface of the workpiece 9 to be zinc sprayed.

[0040] The pitch adjustment mechanism 6 includes a pitch adjustment slide 61, a pitch adjustment drive 62, and a pitch adjustment guide rail 63. The zinc spray gun assembly 4 is mounted on the pitch adjustment slide 61, which is slidably mounted on the pitch adjustment guide rail 63. The pitch adjustment drive 62 is connected to the pitch adjustment slide 61 and is used to drive the zinc spray gun assembly 4 to move towards or away from the surface of the workpiece 9 to be sprayed with zinc. The pitch adjustment drive 62 can be an electric push rod, a lead screw motor, a cylinder, a hydraulic cylinder, or a linear module.

[0041] The control module 7 includes a controller 71, an operation panel 72, and a parameter storage unit 73. The controller 71 is electrically connected to the rotary drive 23, the reciprocating drive 33, the zinc spraying gun 41, the distance sensor 51, and the distance adjustment drive 62. The operation panel 72 is used to input or select parameters such as the outer diameter, length, zinc spraying section, zinc spraying pressure, zinc spraying power, zinc supply, gun movement speed, workpiece rotation speed, preset zinc spraying distance range, and preset overlap ratio of the workpiece 9 to be zinc sprayed. The parameter storage unit 73 is used to store zinc spraying parameters corresponding to workpieces of different specifications.

[0042] During zinc spraying, the controller 71 receives the zinc spraying distance output by the distance sensor 51. When the zinc spraying distance is less than a preset lower limit, the controller 71 controls the distance adjustment drive 62 to move the zinc spraying gun assembly 4 away from the surface of the workpiece 9 to be zinc sprayed; when the zinc spraying distance is greater than a preset upper limit, the controller 71 controls the distance adjustment drive 62 to move the zinc spraying gun assembly 4 closer to the surface of the workpiece 9 to be zinc sprayed; when the zinc spraying distance is within the preset zinc spraying distance range, the controller 71 maintains the current position of the distance adjustment mechanism 6. Thus, the distance between the nozzle 42 and the surface of the workpiece 9 to be zinc sprayed can be kept within a suitable range for zinc spraying.

[0043] The controller 71 is also used to determine the rotation speed of the workpiece clamping and rotating mechanism 2 and the moving speed of the spray gun moving mechanism 3 based on the outer diameter or equivalent spray width of the workpiece 9 to be zinc sprayed, the spray width of the zinc spray gun assembly 4, and the preset overlap ratio, so that the zinc spray gun assembly 4 forms a zinc spraying path on the surface of the workpiece 9 to be zinc sprayed with adjacent zinc spraying trajectories 94 overlapping each other. The equivalent spray width can be the width to be covered of the workpiece 9 to be zinc sprayed in the zinc spraying direction, and the preset overlap ratio can be the ratio of the overlap width of adjacent zinc spraying trajectories 94 to the spray width. The preset overlap ratio can be set according to the zinc spraying layer thickness requirements, the type of zinc spraying material, or the surface condition of the workpiece.

[0044] In one embodiment, the zinc spraying area of ​​the workpiece 9 to be zinc-sprayed can be divided into a first end section 91, a middle section 92, and a second end section 93. The controller 71 controls the zinc spraying gun assembly 4 to spray zinc in the first end section 91, the middle section 92, and the second end section 93 using corresponding zinc spraying parameters. The zinc spraying parameters may include at least one of the following: zinc spraying gun moving speed, workpiece rotation speed, zinc spraying time, zinc spraying pressure, zinc supply quantity, and zinc spraying power. For the end section, the zinc spraying gun moving speed can be appropriately reduced, the dwell time increased, or the number of zinc spraying cycles increased to reduce insufficient coating in the end area; for the middle section, a stable spraying gun moving speed and workpiece rotation speed can be used to maintain continuous zinc coating coverage.

[0045] The dust recovery mechanism 8 includes a negative pressure suction port 81, a guide plate, a filter recovery box 83, a zinc collection box 84, a filter element 85, and a negative pressure fan 86. The negative pressure suction port 81 is connected to the zinc spraying chamber 1. The guide plate is located inside the zinc spraying chamber 1 and is used to guide unattached zinc powder or zinc spray particles to the negative pressure suction port 81. The filter recovery box 83 is connected to the negative pressure suction port 81, and the filter element 85 is located inside the filter recovery box 83 to intercept zinc powder or zinc spray particles generated during the zinc spraying process. The zinc collection box 84 is detachably located at the lower part of the filter recovery box 83 and is used to collect the zinc powder or zinc spray particles separated by the filter recovery box 83. The negative pressure fan 86 is used to create an airflow towards the negative pressure suction port 81 within the zinc spraying chamber 1 to reduce zinc powder escape.

[0046] When this device is in operation, first open the protective door 12, place the workpiece 9 to be zinc-sprayed between the first clamping seat 21 and the second clamping seat 22, and clamp both ends of the workpiece 9 to be zinc-sprayed using the clamping head 26. Adjust the position of the first clamping seat 21 or the second clamping seat 22 according to the length of the workpiece 9 to be zinc-sprayed, and adjust the height of the adjustable support seat 25 according to the diameter of the workpiece 9 to be zinc-sprayed. After closing the protective door 12, input or select the zinc spraying parameters through the operation panel 72.

[0047] The controller 71 activates the rotary drive 23, causing the workpiece 9 to be zinc-sprayed to rotate around its own axis; simultaneously, it activates the reciprocating drive 33, causing the movable slide 32 to move the zinc spraying gun assembly 4 along the movable guide rail 31. The distance sensor 51 detects the zinc spraying distance between the nozzle 42 and the surface of the workpiece 9. Based on the detection result, the controller 71 controls the distance adjustment drive 62 to maintain the zinc spraying gun assembly 4 within a preset zinc spraying distance range from the surface of the workpiece 9. Subsequently, the controller 71 controls the zinc spraying gun 41 to spray zinc, using corresponding zinc spraying parameters based on the segment position of the workpiece 9.

[0048] When the zinc spraying gun assembly 4 moves to the first end section 91, the controller 71 can control the zinc spraying gun 41 to use the first zinc spraying parameters; when the zinc spraying gun assembly 4 moves to the middle section 92, the controller 71 can control the zinc spraying gun 41 to use the second zinc spraying parameters; when the zinc spraying gun assembly 4 moves to the second end section 93, the controller 71 can control the zinc spraying gun 41 to use the third zinc spraying parameters. The first, second, and third zinc spraying parameters can be the same or different. By using corresponding zinc spraying parameters for different sections, the situation of insufficient coating in the end area or uneven local zinc coating can be reduced.

[0049] During zinc spraying, the negative pressure fan 86 operates, creating an airflow within the zinc spraying chamber 1 directed towards the negative pressure suction port 81. Unattached zinc powder or sprayed zinc particles are guided by the baffle plate into the filter recovery box 83, where they are intercepted by the filter element 85 and fall into the zinc collection box 84. After zinc spraying is complete, the filter recovery box 83 can be opened to remove the zinc collection box 84 for processing of the collected zinc powder or sprayed zinc particles.

[0050] In the above embodiments, the workpiece 9 to be zinc sprayed can be a pipe, rod, shaft, or other workpiece that can be clamped and rotated by a clamping and rotating mechanism. For workpieces with non-circular cross-sections, the position of the zinc spraying gun assembly 4 can also be adjusted during the zinc spraying process by the distance detection module 5 and the distance adjustment mechanism 6 to reduce the influence of workpiece surface undulations or contour changes on the zinc spraying distance.

[0051] In other embodiments, the zinc spraying gun assembly 4 can be one or more. Multiple zinc spraying gun assemblies 4 can be arranged at intervals along the circumferential or length direction of the workpiece 9 to be zinc sprayed, and are controlled separately by the control module 7. Multiple distance detection modules 5 can also be used to detect the zinc spraying distance corresponding to different zinc spraying gun assemblies 4. The distance adjustment mechanism 6 can be configured one-to-one with each zinc spraying gun assembly 4, or multiple zinc spraying gun assemblies 4 can be adjusted simultaneously by a single distance adjustment mechanism 6.

[0052] In other embodiments, the control module 7 can automatically call the corresponding zinc spraying parameters based on pre-stored workpiece specification parameters, or it can calculate the spray gun moving speed, workpiece rotation speed, and zinc spraying time based on the workpiece outer diameter, length, equivalent spraying width, and zinc layer thickness requirements input by the operator. The preset zinc spraying distance range, preset overlap ratio, and zinc spraying parameters for each section can be adjusted according to the zinc spraying material, zinc spraying process requirements, or workpiece surface condition.

[0053] The above are merely specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on the present invention to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of the present invention.

Claims

1. An automatic uniform zinc spraying device, characterized in that, The system includes a zinc spraying chamber (1), a workpiece clamping and rotating mechanism (2), a spray gun moving mechanism (3), a zinc spray gun assembly (4), a distance detection module (5), a distance adjustment mechanism (6), and a control module (7). The workpiece clamping and rotating mechanism (2) is located inside the zinc spraying chamber (1) and is used to clamp the workpiece (9) to be sprayed with zinc and drive the workpiece (9) to be sprayed with zinc to rotate around its own axis. The spray gun moving mechanism (3) is located inside the zinc spraying chamber (1) along the length direction of the workpiece (9) to be sprayed with zinc. The zinc spray gun assembly (4) is located on the spray gun moving mechanism (3) and can reciprocate along the length direction of the workpiece (9) to be sprayed with zinc under the drive of the spray gun moving mechanism (3). The distance detection module (5) is used to detect the zinc spraying distance between the nozzle (42) of the zinc spray gun assembly (4) and the surface of the workpiece (9) to be sprayed with zinc. The distance adjustment mechanism (6) is used to detect the distance between the nozzle (42) of the zinc spray gun assembly (4) and the surface of the workpiece (9) to be sprayed with zinc. The mechanism (6) is connected to the zinc spray gun assembly (4) and is used to drive the zinc spray gun assembly (4) to move toward or away from the surface of the zinc-spraying workpiece (9). The control module (7) is electrically connected to the workpiece clamping and rotating mechanism (2), the spray gun moving mechanism (3), the zinc spray gun assembly (4), the distance detection module (5), and the distance adjustment mechanism (6). The control module (7) is used to control the rotation of the zinc-spraying workpiece (9) and to control the zinc spray gun assembly (4) to reciprocate along the length direction of the zinc-spraying workpiece (9). The control module (7) is also used to control the action of the distance adjustment mechanism (6) according to the zinc spraying distance detected by the distance detection module (5) so that the zinc spraying distance between the nozzle (42) of the zinc spray gun assembly (4) and the surface of the zinc-spraying workpiece (9) is kept within the preset zinc spraying distance range.

2. The automatic uniform zinc spraying device according to claim 1, characterized in that, The workpiece clamping and rotating mechanism (2) includes a first clamping seat (21), a second clamping seat (22), and a rotating drive (23). The first clamping seat (21) and the second clamping seat (22) are arranged opposite to each other in the zinc spraying chamber (1) for clamping both ends of the workpiece (9) to be sprayed with zinc. The rotating drive (23) is connected to the first clamping seat (21) and the second clamping seat (22) for driving the workpiece (9) to be sprayed with zinc to rotate.

3. The automatic uniform zinc spraying device according to claim 2, characterized in that, The workpiece clamping and rotating mechanism (2) further includes a support guide rail (24) and an adjustable support seat (25). The first clamping seat (21) and the second clamping seat (22) are disposed on the support guide rail (24) and can move along the support guide rail (24) to adjust the distance between the first clamping seat (21) and the second clamping seat (22). The adjustable support seat (25) is disposed between the first clamping seat (21) and the second clamping seat (22) to support zinc-sprayed workpieces (9) of different lengths.

4. The automatic uniform zinc spraying device according to claim 1, characterized in that, The spray gun moving mechanism (3) includes a moving guide rail (31), a moving slide (32), and a reciprocating drive (33). The moving guide rail (31) is arranged along the length direction of the zinc-spraying workpiece (9). The moving slide (32) is slidably arranged on the moving guide rail (31). The zinc spray gun assembly (4) is arranged on the moving slide (32). The reciprocating drive (33) is connected to the moving slide (32) for driving the moving slide (32) to reciprocate along the moving guide rail (31).

5. The automatic uniform zinc spraying device according to claim 1, characterized in that, The adjusting mechanism (6) includes an adjusting slide (61) and an adjusting drive (62). The zinc spraying gun assembly (4) is disposed on the adjusting slide (61). The adjusting drive (62) is connected to the adjusting slide (61) for driving the zinc spraying gun assembly (4) to move toward or away from the surface of the workpiece (9) to be sprayed with zinc. The control module (7) is used to control the adjusting drive (62) to drive the zinc spraying gun assembly (4) away from the surface of the workpiece (9) to be sprayed with zinc when the zinc spraying distance is less than a preset lower limit value, and to control the adjusting drive (62) to drive the zinc spraying gun assembly (4) to move toward the surface of the workpiece (9) to be sprayed with zinc when the zinc spraying distance is greater than a preset upper limit value.

6. The automatic uniform zinc spraying device according to claim 1, characterized in that, The control module (7) is used to determine the outer diameter or equivalent spraying width of the workpiece (9) to be sprayed with zinc, the spray width of the zinc spraying gun assembly (4), and the preset overlap ratio. The rotational speed of the clamping and rotating mechanism (2) and the moving speed of the spray gun moving mechanism (3) cause the zinc spray gun assembly (4) to form a zinc spraying path on the surface of the workpiece (9) to be sprayed with zinc, where adjacent zinc spraying trajectories (94) overlap.

7. The automatic uniform zinc spraying device according to claim 1, characterized in that, The control module (7) is used to divide the zinc spraying area of ​​the workpiece (9) to be zinc sprayed into a first end section (91), a middle section (92), and a second end section (93), and to control the zinc spraying gun assembly (4) to spray zinc in the first end section (91), the middle section (92), and the second end section (93) respectively using corresponding zinc spraying parameters. The zinc spraying parameters include at least one of the following: zinc spraying gun moving speed, workpiece rotation speed, zinc spraying time, zinc spraying pressure, zinc supply amount, and zinc spraying power.

8. The automatic uniform zinc spraying device according to any one of claims 1 to 7, characterized in that, It also includes a dust recovery mechanism (8), which includes a negative pressure air intake (81), a guide plate, a filter recovery box (83), and a zinc collection box (84). The negative pressure air intake (81) is connected to the zinc spraying chamber (1). The guide plate is set in the zinc spraying chamber (1) to guide the unattached zinc powder or zinc spraying particles to the negative pressure air intake (81). The filter recovery box (83) is connected to the negative pressure air intake (81). The zinc collection box (84) is detachably set at the lower part of the filter recovery box (83) to collect the zinc powder or zinc spraying particles separated by the filter recovery box (83).

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