A spraying device for processing large-size complex structural parts

Abstract

The application discloses a spraying device for machining large-size complex structural parts and relates to the technical field of spraying devices.The spraying device comprises a mechanical arm, a spacing adjusting mechanism, a spraying head, an angle adjusting mechanism, a detection mechanism and a pressure adjusting mechanism.The shape of a spraying part and the distance from a nozzle to a workpiece are detected in real time through laser ranging sensors and visual sensors.The spacing adjusting mechanism and the angle adjusting mechanism are driven by a control system to adjust two spraying heads, so that the indirect spraying heads and the nozzle angles are matched with the spraying surface of the large-size complex structural part to be sprayed.Meanwhile, a motor drives a cam to move a movable block, so that the cross section of the outlet of the nozzle is changed, the nozzle can be adjusted according to the needs of paint spraying, the spraying frequency is reduced, the machining efficiency is improved, and when the pressure of a feeding device fluctuates during spraying, the pressure adjusting mechanism is used for pressure stabilization, so that the pressure fluctuation does not affect the spraying quality.

Description

Technical Field

[0001] This invention relates to the field of spraying equipment technology, specifically a spraying equipment for processing large-sized complex structural parts. Background Technology

[0002] When processing large and complex structural parts, surface treatment is usually required, which involves spraying a layer of paint onto the surface. Spraying equipment is typically used during the spraying process.

[0003] Existing spraying equipment for large structural components typically uses parallel nozzles mounted on a robotic arm to increase the spraying area. The robotic arm drives the nozzles to move and spray the structural components. However, for large and complex structural components, the components may simultaneously have flat surfaces, curved surfaces, or be connected at an angle between two surfaces. At the same time, some surfaces of the structural components may require spraying paint with varying thicknesses. In this case, although parallel nozzles can increase the spraying area, they cannot be adjusted according to actual needs. Sometimes, only one nozzle can be used for spraying, which affects processing efficiency. Furthermore, the spraying equipment requires an external feeding device to supply paint during spraying. The feeding device may use a plunger pump or gear pump to deliver the paint. Pressure fluctuations in the feeding device during spraying may cause changes in the amount of paint sprayed, resulting in uneven paint thickness and affecting the quality of the spraying. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the inability to adjust the nozzle leads to low processing efficiency and the pressure fluctuation of the feeding device may cause uneven coating thickness, which affects the coating quality. The present invention provides a coating device for processing large-size complex structural parts.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A spraying device for processing large-sized complex structural parts. The spraying device includes a robotic arm, a spacing adjustment mechanism on the robotic arm, a spray head on the spacing adjustment mechanism, an angle adjustment mechanism on the spray head, and a detection mechanism on the angle adjustment mechanism. The nozzle contains a mixing chamber, an adjusting chamber, and a connecting channel; Both the regulating chamber and the mixing chamber are equipped with pressure regulating mechanisms; The pressure regulating mechanism includes an regulating block, on which an regulating component is provided; The mixing chamber is equipped with an air inlet, and both the regulating chamber and the air inlet are equipped with delivery pipes. The regulating chamber, the connecting channel, and the mixing chamber are connected in sequence, and the connection ports of the delivery pipe and the connecting channel are located on both sides of the regulating block.

[0006] Two nozzles are installed on the robotic arm via a spacing adjustment mechanism. A detection mechanism monitors the shape and distance of the workpiece in real time. A control system drives the spacing adjustment mechanism to adjust the distance between the two nozzles, ensuring proper spacing when encountering grooves or narrow areas. This prevents paint from being sprayed onto unwanted areas or overlapping areas. An angle adjustment mechanism on each nozzle allows for real-time adjustment of the paint nozzle's deflection angle, ensuring it remains perpendicular to the spraying area and improving spray uniformity. An adjustment cavity is installed within each nozzle, and an external paint supply device connects via a delivery pipe and... The regulating chamber is connected, allowing the paint to enter first, increasing the pressure in the regulating chamber and pushing the regulating block to slide. This connects the regulating chamber, connecting channel, and mixing chamber sequentially, allowing the pressure-stabilized paint to enter the mixing chamber and push the regulating block to slide. The air inlet of the mixing chamber is connected to an external air source device through a delivery pipe, allowing the airflow and paint to mix in the mixing chamber before being sprayed out, forming a spray. By setting an adjustment component on one side of the regulating block, the volume of the chamber can be adjusted in real time according to the pressure fluctuations of the paint and airflow supply devices, avoiding pressure fluctuations from affecting the spraying effect and thus preventing uneven coating thickness.

[0007] Furthermore, the cross-sectional area of ​​the air intake gradually increases along the sliding direction of the adjusting block.

[0008] By setting the cross-sectional shape of the air inlet to a triangular shape with an area that gradually increases along the sliding direction of the adjusting block, the structure of the external material supply device pressurizing and adjusting the nozzle area to increase the spray flow rate increases the airflow entering the mixing chamber. At the same time, it avoids the air inlet from becoming too large too quickly, which would lead to excessive air intake. This adjusts the mixing ratio of paint and airflow, thereby improving the spraying quality.

[0009] Furthermore, the adjustment assembly includes a screw, a screw and a nozzle threaded connection, and an adjustment spring is provided between the screw and the adjustment block.

[0010] By installing an adjusting spring between the screw and the adjusting block, when pressure fluctuations occur in the feeding device, the adjusting block can overcome the elastic force of the adjusting spring and slide when the pressure increases, thus increasing the volume of the chamber. When the pressure decreases, the adjusting block can slide under the elastic force of the adjusting spring, thus increasing the volume of the chamber and stabilizing the spraying pressure.

[0011] Furthermore, the spacing adjustment mechanism includes an adjusting screw, which is connected to the nozzle via a drive mechanism and to a robotic arm via a rotation mechanism. The robotic arm is equipped with a guide rod and a power source, which are slidably connected to the nozzle. The power source is connected to the adjusting screw via a drive mechanism.

[0012] An adjusting screw is installed on the robotic arm. The adjusting screw is rotatably connected to the robotic arm via bearings. The adjusting screw is a bidirectional screw, with two nozzles located on opposite sides of the bidirectional screw and connected to it via nuts. A guide rod is installed so that the two nozzles can only move along the screw axis. The power source is a motor, and the motor output is connected to the adjusting screw via gears, thereby driving the adjusting screw to rotate and causing the two nozzles to move closer or further apart, thus adjusting the distance between the two nozzles.

[0013] Furthermore, the angle adjustment mechanism includes a nozzle, an electric push rod on the nozzle head, a hinged connection between the nozzle and the electric push rod, and a connection between the nozzle and the mixing chamber pipe.

[0014] By setting three electric push rods along the circumference of the nozzle between the spray head and the nozzle from which the paint is sprayed, and connecting the electric push rods and the nozzles through a spherical hinge, the deflection angle of the nozzles can be adjusted by extending and retracting the electric push rods. This ensures that when spraying curved surfaces, the nozzle axis is always perpendicular to the local area of ​​the curved surface, thereby ensuring uniform spraying.

[0015] Furthermore, the detection mechanism includes a visual sensor and a laser rangefinder, both of which are located on the nozzle.

[0016] By installing laser rangefinders and vision sensors on the nozzles, the shape of the spraying area and the distance from the nozzle to the workpiece can be detected in real time. The detected signals are transmitted to the control system, which adjusts the nozzles in real time through a robotic arm, a spacing adjustment structure, and an angle adjustment structure, thereby achieving feedback adjustment of the nozzles and improving the quality of spraying.

[0017] Furthermore, the nozzle is equipped with a cross-section adjustment mechanism; The nozzle is equipped with a discharge channel; The cross-section adjustment mechanism includes a turntable, a rotating motor on the nozzle, and the output end of the rotating motor is connected to the turntable via a drive. The turntable has several through holes, which are distributed in a circle, and the cross-sectional area of ​​the through holes gradually decreases along the circumference.

[0018] By setting a turntable at the outlet of the nozzle's discharge channel, the through holes (circular holes) on the turntable are connected to the discharge channel, allowing the paint to be sprayed out. The turntable has several through holes with gradually decreasing cross-sectional areas distributed around its circumference. By rotating the turntable with a motor, different sized through holes are aligned with the discharge channel, thereby adjusting the nozzle's outlet size and thus the spraying flow rate.

[0019] Furthermore, the cross-section adjustment mechanism includes two movable blocks, each with two drive components on one side, and the two drive components are located at both ends of the movable block; The nozzle is equipped with a movable cavity; The two movable blocks and the movable cavity are movably connected.

[0020] Two rectangular movable blocks are set on the movable cavity, located on opposite sides of the discharge channel and initially symmetrically distributed. Drive components are set at both ends of each movable block, which drive the movable blocks to move, causing one end of the movable block to move closer to the other, thus tilting it and changing the outlet from rectangular to triangular. This allows the paint volume to gradually decrease from one side to the other, enabling the coating of a transitional paint surface from thick to thin in one go, improving work efficiency. Alternatively, both ends of the movable blocks can be driven to move closer to the other simultaneously, thus narrowing the outlet and adjusting the spray flow. When the drive components are reset, the movable blocks are reset by the action of the reset spring.

[0021] Furthermore, the drive assembly includes a drive motor, and a cam is provided on the output end of the drive motor, with the cam abutting against the movable block.

[0022] By setting cams at both ends of the side of the movable block, the cams abut against the movable block, and the cams are driven by a drive motor, thereby pushing the movable block to move and adjusting the position of the movable block.

[0023] Compared with the prior art, the beneficial effects of the present invention are: 1. By setting an adjustment chamber before the paint enters the mixing chamber, and setting adjustment blocks in both the mixing chamber and the adjustment chamber, and cooperating with the adjustment components, the adjustment blocks move when there are pressure fluctuations in the external material supply device or air supply device, thereby changing the size of the chamber volume to balance the pressure changes and thus avoid pressure fluctuations affecting the quality of spraying.

[0024] 2. By setting two movable blocks at the nozzle outlet, and driving the cam to rotate via a drive motor, the movable blocks are moved, making the cross-sectional area of ​​the nozzle outlet wider, narrower, or triangular. This allows the paint thickness to be adjusted according to the needs of paint spraying, and a paint surface with a gradual thickness can be sprayed in one go, thereby reducing the number of spraying times and improving processing efficiency.

[0025] 3. By setting up spacing and angle adjustment mechanisms, the nozzle can be adjusted according to the specific shape of large and complex structural parts, improving the uniformity of spraying and avoiding repeated spraying. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 yes Figure 1 A magnified view of part A; Figure 3 This is a schematic diagram of the structure of Embodiment 1 of the present invention; Figure 4 yes Figure 3 A magnified view of part B; Figure 5 This is a schematic cross-sectional view of the air inlet of the present invention; Figure 6 This is a schematic diagram showing the distribution of the through holes in this invention; Figure 7 This is a schematic diagram of the structure of Embodiment 2 of the present invention; Figure 8 This is a schematic diagram showing the distribution of the cam in this invention.

[0027] In the diagram: 1. Robotic arm; 2. Spacing adjustment mechanism; 21. Adjusting screw; 22. Guide rod; 23. Power source; 3. Nozzle; 31. Mixing chamber; 32. Adjusting chamber; 33. Connecting channel; 34. Air inlet; 4. Angle adjustment mechanism; 41. Nozzle; 411. Discharge channel; 412. Movable chamber; 42. Electric push rod; 43. Cross-section adjustment mechanism; 431. Turntable; 4311. Through hole; 432. Rotary motor; 433. Movable block; 434. Drive assembly; 4341. Drive motor; 4342. Cam; 5. Detection mechanism; 51. Vision sensor; 52. Laser rangefinder sensor; 6. Pressure adjustment mechanism; 61. Adjusting block; 62. Adjusting assembly; 621. Screw; 622. Adjusting spring; 7. Conveying pipe. Detailed Implementation

[0028] 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.

[0029] Example 1: As Figures 1-4 As shown, the present invention provides the following technical solution: A spraying device for processing large-sized complex structural parts. The spraying device includes a robotic arm 1, a spacing adjustment mechanism 2 on the robotic arm 1, a spray head 3 on the spacing adjustment mechanism 2, an angle adjustment mechanism 4 on the spray head 3, and a detection mechanism 5 on the angle adjustment mechanism 4. The nozzle 3 is provided with a mixing chamber 31, an adjusting chamber 32 and a connecting channel 33; Both the regulating chamber 32 and the mixing chamber 31 are equipped with pressure regulating mechanisms 6; The pressure regulating mechanism 6 includes an regulating block 61, and the regulating block 61 is provided with an regulating component 62; The mixing chamber 31 is provided with an air inlet 34, and the regulating chamber 32 and the air inlet 34 are both provided with a delivery pipe 7. The regulating chamber 32, the connecting channel 33 and the mixing chamber 31 are connected in sequence, and the connection ports of the delivery pipe 7 and the connecting channel 33 are located on both sides of the regulating block 61.

[0030] Two nozzles 3 are installed on the spacing adjustment mechanism 2 of the robotic arm 1. The shape and distance of the workpiece to be sprayed are detected in real time by the detection mechanism 5. The control system drives the spacing adjustment mechanism 2 to adjust the spacing between the two nozzles 3, so that when encountering grooves or narrow areas, the spacing between the two nozzles 3 can be adjusted in real time to avoid spraying paint onto areas that do not need to be sprayed, or to avoid the spraying areas of the two nozzles 3 overlapping. An angle adjustment mechanism 4 is provided on the nozzle 3 to adjust the deflection angle of the paint spray outlet in real time, so that it is always perpendicular to the spraying area, improving the uniformity of spraying. An adjustment cavity 32 is set in the nozzle 3, and the external paint supply device is connected to the adjustment cavity 32 through the delivery pipe 7, so that... The paint first enters the regulating chamber 32, causing the pressure in the regulating chamber 32 to rise and push the regulating block 61 to slide, so that the regulating chamber 32, the connecting channel 33 and the mixing chamber 31 are connected in sequence, allowing the pressure-stabilized paint to enter the mixing chamber 31 and push the regulating block 61 of the mixing chamber 31 to slide. The air inlet 34 of the mixing chamber 31 is connected to the external air source device through the delivery pipe 7, so that the airflow and paint are mixed in the mixing chamber 31 and then sprayed out to form a spray. By setting the regulating component 62 on one side of the regulating block 61, the volume of the chamber can be adjusted in real time according to the pressure fluctuation of the paint and airflow supply device, so as to avoid the pressure fluctuation affecting the spraying effect and thus avoid uneven thickness of the spraying.

[0031] like Figure 3 and Figure 5 As shown, the cross-sectional area of ​​the air inlet 34 gradually increases along the sliding direction of the adjusting block 61.

[0032] By setting the cross-sectional shape of the air inlet 34 to a triangular shape with a variable cross-section and gradually increasing the area along the sliding direction of the adjusting block 61, the airflow entering the mixing chamber 31 is increased when the external material supply device pressurizes and adjusts the nozzle area to increase the spray flow. At the same time, the air inlet 34 is prevented from increasing too quickly, which would lead to excessive air intake. This adjusts the mixing ratio of paint and airflow and improves the spraying quality.

[0033] like Figure 3 As shown, the adjustment assembly 62 includes a screw 621, which is threadedly connected to the nozzle 3, and an adjustment spring 622 is provided between the screw 621 and the adjustment block 61.

[0034] By providing an adjusting spring 622 between the screw 621 and the adjusting block 61, when pressure fluctuations occur in the feeding device, when the pressure increases, the adjusting block 61 can overcome the elastic force of the adjusting spring 622 and slide, increasing the volume of the chamber. When the pressure decreases, the adjusting block 61 can slide under the elastic force of the adjusting spring 622, increasing the volume of the chamber, thereby stabilizing the spraying pressure.

[0035] like Figure 2As shown, the spacing adjustment mechanism 2 includes an adjustment screw 21, which is connected to the nozzle 3 via a transmission. The adjustment screw 21 is also connected to the robotic arm 1 via a rotation. The robotic arm 1 is equipped with a guide rod 22 and a power source 23. The guide rod 22 is slidably connected to the nozzle 3, and the power source 23 is connected to the adjustment screw 21 via a transmission.

[0036] An adjusting screw 21 is installed on the robotic arm 1. The adjusting screw 21 is rotatably connected to the robotic arm 1 through a bearing. The adjusting screw 21 is a bidirectional screw. The two nozzles 3 are located on both sides of the bidirectional screw and are connected to the bidirectional screw through a nut. By setting a guide rod 22, the two nozzles 3 can only move along the screw axis. The power source 23 is a motor. The output end of the motor is connected to the adjusting screw 21 through a gear, thereby driving the adjusting screw 21 to rotate, so that the two nozzles 3 move closer or further apart, thereby adjusting the distance between the two nozzles 3.

[0037] like Figure 4 As shown, the angle adjustment mechanism 4 includes a nozzle 41, and an electric push rod 42 is provided on the nozzle 3. The nozzle 41 and the electric push rod 42 are hinged together, and the nozzle 41 is pipe-connected to the mixing chamber 31.

[0038] By setting three electric push rods 42 along the circumference of the nozzle between the nozzle 3 and the nozzle 41 from which the paint is sprayed, and connecting the electric push rods 42 and the nozzle 41 through a spherical hinge, the deflection angle of the nozzle 41 can be adjusted by extending and retracting the electric push rods 42, so that when spraying curved surfaces, the nozzle axis can always be perpendicular to the local area of ​​the curved surface, thereby ensuring uniform spraying.

[0039] like Figure 4 As shown, the detection mechanism 5 includes a visual sensor 51 and a laser rangefinder 52, both of which are located on the nozzle 41.

[0040] By setting a laser rangefinder 52 and a vision sensor 51 on the nozzle 41, the shape of the spraying area and the distance from the nozzle to the workpiece can be detected in real time, and the detected signals are transmitted to the control system. The control system adjusts the nozzle 41 in real time through the robotic arm 1, the spacing adjustment structure and the angle adjustment structure, thereby realizing feedback adjustment of the nozzle 41 and improving the spraying quality.

[0041] like Figure 4 and Figure 6 As shown, the nozzle 41 is equipped with a cross-section adjustment mechanism 43; The nozzle 41 is provided with a discharge channel 411; The cross-section adjustment mechanism 43 includes a turntable 431, a rotary motor 432 is provided on the nozzle 41, and the output end of the rotary motor 432 is connected to the turntable 431 in a transmission connection. The turntable 431 has several through holes 4311, which are distributed in a circle, and the cross-sectional area of ​​the through holes 4311 gradually decreases along the circumferential direction.

[0042] By setting a turntable 431 at the outlet of the discharge channel 411 of the nozzle 41, the through hole 4311 (i.e., the round hole) on the turntable 431 is connected to the discharge channel 411, so that the paint is sprayed out. The turntable 431 has several through holes 4311 with a cross-sectional area that gradually decreases along the circumference. By rotating the motor 432 to drive the turntable 431 to rotate, the different sizes of through holes 4311 are aligned with the discharge channel 411, thereby adjusting the outlet size of the nozzle 41 and thus adjusting the spray flow rate.

[0043] Example 2: Figure 7 and Figure 8 As shown, a nozzle cross-section adjustment structure different from Embodiment 1 is provided. The difference is that this embodiment can not only change the size of the nozzle cross-section, but also adjust its shape, so that it can complete the spraying in one go when spraying chamfered areas, thereby improving processing efficiency.

[0044] The cross-section adjustment mechanism 43 includes two movable blocks 433, and each movable block 433 has two drive components 434 on one side, with the two drive components 434 located at both ends of the movable block 433. The nozzle 41 is provided with a movable cavity 412; The two movable blocks 433 and the movable cavity 412 are movably connected.

[0045] Two rectangular movable blocks 433 are set on the movable cavity 412. The two movable blocks 433 are located on opposite sides of the discharge channel 411 and are symmetrically distributed in the initial state. By setting drive components 434 at both ends of each side of the movable block 433, the movable blocks 433 are driven to move, so that one end of the movable block 433 moves closer to the other movable block 433, thereby tilting and changing the outlet from rectangular to triangular. This allows the amount of paint sprayed to gradually decrease from one side to the other, so that the transition paint surface from thick to thin can be sprayed in one go, improving work efficiency. Alternatively, both ends of the movable blocks 433 can be driven to move closer to the other movable block 433 at the same time, thereby narrowing the outlet and adjusting the spray flow. When the drive components 434 are reset, the movable blocks 433 are reset under the action of the reset spring.

[0046] like Figure 7 As shown, the drive assembly 434 includes a drive motor 4341, and a cam 4342 is provided on the output end of the drive motor 4341. The cam 4342 abuts against the movable block 433.

[0047] By setting cams 4342 at both ends of the side of the movable block 433, the cams 4342 abut against the movable block 433, and the cams 4342 are driven by the drive motor 4341, thereby causing the cams 4342 to push the movable block 433 to move, thus adjusting the position of the movable block 433.

[0048] Working principle of the invention: When the spraying device is working, the laser rangefinder 52 and vision sensor 51 on the nozzle 41 detect the shape of the spraying area and the distance from the nozzle to the workpiece in real time. Based on the detected signals, the control system drives the robotic arm 1 to move and the power source 23 drives the adjusting screw 21 to rotate, adjusting the distance between the two nozzles 3. Simultaneously, it drives the miniature electric push rod 42 to push the nozzle 41 to deflect at a certain angle, aligning the spray outlet with the workpiece. According to the desired spraying volume and paint surface, the drive motor 4341 drives the cam 4342 to rotate, which in turn pushes the movable block 433 to move, changing the size of the spray outlet and thus adjusting the spraying volume. When gradient paint needs to be sprayed... When the paint is applied, the drive motor 4341 at one end of the movable block 433 drives the cam 4342 to rotate, while the drive motor 4341 at the other end does not work. This causes the cross-section of the spray outlet to change into a gradient structure, forming a triangle, which enables the spraying of the gradient paint surface in one go, improving work efficiency. The paint enters the regulating chamber 32 and then the mixing chamber 31 through the external feeding device. The airflow enters the mixing chamber 31 directly through the external air supply device. When the pressure of the feeding device or the air supply device fluctuates, the liquid or gas-liquid mixture in the regulating chamber 32 and the mixing chamber 31 drives the regulating block 61 to move, thereby changing the chamber volume and stabilizing the pressure to avoid pressure fluctuations affecting the quality of the spraying.

[0049] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A spraying device for processing large-sized complex structural parts, characterized in that: The spraying device includes a robotic arm (1), a spacing adjustment mechanism (2) is provided on the robotic arm (1), a nozzle (3) is provided on the spacing adjustment mechanism (2), an angle adjustment mechanism (4) is provided on the nozzle (3), and a detection mechanism (5) is provided on the angle adjustment mechanism (4). The nozzle (3) is provided with a mixing chamber (31), an adjustment chamber (32) and a connecting channel (33); Both the regulating chamber (32) and the mixing chamber (31) are equipped with pressure regulating mechanisms (6); The pressure regulating mechanism (6) includes an regulating block (61), and the regulating block (61) is provided with an regulating component (62). The mixing chamber (31) is provided with an air inlet (34), and the regulating chamber (32) and the air inlet (34) are both provided with a delivery pipe (7). The regulating chamber (32), the connecting channel (33) and the mixing chamber (31) are connected in sequence. The connection ports of the delivery pipe (7) and the connecting channel (33) are located on both sides of the regulating block (61). The angle adjustment mechanism (4) includes a nozzle (41), and an electric push rod (42) is provided on the nozzle (3). The nozzle (41) and the electric push rod (42) are hinged together, and the nozzle (41) is piped to the mixing chamber (31). The nozzle (41) is provided with a cross-section adjustment mechanism (43); The nozzle (41) is provided with a discharge channel (411). The cross-section adjustment mechanism (43) includes a turntable (431), and a rotating motor (432) is provided on the nozzle (41). The output end of the rotating motor (432) is connected to the turntable (431) in a transmission manner. The turntable (431) is provided with a plurality of through holes (4311), which are distributed in a circular pattern, and the cross-sectional area of ​​the plurality of through holes (4311) gradually decreases along the circumferential direction; The cross-section adjustment mechanism (43) includes two movable blocks (433), and each movable block (433) has two drive components (434) on one side, with the two drive components (434) located at both ends of the movable block (433); The nozzle (41) is provided with a movable cavity (412). The two movable blocks (433) and the movable cavity (412) are movably connected.

2. The spraying device for processing large-size complex structural parts according to claim 1, characterized in that: The cross-sectional area of ​​the air inlet (34) gradually increases along the sliding direction of the adjusting block (61).

3. A spraying device for processing large-size complex structural parts according to claim 2, characterized in that: The adjustment assembly (62) includes a screw (621) that is threadedly connected to the nozzle (3), and an adjustment spring (622) is provided between the screw (621) and the adjustment block (61).

4. The spraying device for processing large-size complex structural parts according to claim 1, characterized in that: The spacing adjustment mechanism (2) includes an adjustment screw (21), which is connected to the nozzle (3) in a transmission manner. The adjustment screw (21) is rotatably connected to the robotic arm (1). The robotic arm (1) is provided with a guide rod (22) and a power source (23). The guide rod (22) is slidably connected to the nozzle (3), and the power source (23) is connected to the adjustment screw (21) in a transmission manner.

5. A spraying device for processing large-size complex structural parts according to claim 1, characterized in that: The detection mechanism (5) includes a visual sensor (51) and a laser rangefinder (52), both of which are located on the nozzle (41).

6. A spraying device for processing large-size complex structural parts according to claim 5, characterized in that: The drive assembly (434) includes a drive motor (4341), and a cam (4342) is provided on the output end of the drive motor (4341). The cam (4342) abuts against the movable block (433).

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