Bridge road guardrail surface spraying equipment and using method thereof

Abstract

The invention relates to the technical field of spraying devices, in particular to bridge road guardrail surface spraying equipment and a using method thereof.The bridge road guardrail surface spraying equipment comprises a moving platform, a platen is fixedly installed at the top of the moving platform, a lifting assembly is arranged on one side of the platen, and a telescopic and rotatable moving assembly is arranged on a transmission part of the lifting assembly; a spray head assembly used for spraying is installed at the end of the moving assembly and connected with an output port of the paint pump through a hose, and a calibration assembly used for calibrating the position of the guardrail is further arranged on one side of the moving assembly. In the spraying process, the moving assembly drives the spray head to rotate to enable the spray head to achieve the complete spraying effect on the guardrail, accurate positioning of the spray head and the guardrail is guaranteed through the calibration assembly, and therefore the consistency of the spraying effect is guaranteed, the spraying efficiency and effect of the bridge and road guardrail are improved, and the spraying efficiency of the bridge and road guardrail is improved. And the spraying range is close to the guardrail in a concentrated manner, so that the waste of the spraying fluid and the adverse effect on the external environment are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of spraying devices, and in particular to a surface spraying device for a bridge road guardrail and a use method thereof. Background Art

[0002] Bridge road guardrails refer to buildings installed on bridge roads to prevent out-of-control vehicles from running out. In order to meet sufficient service cycles and complete functions, bridge road guardrails need to be maintained regularly and sprayed with paint, anti-rust coatings and other spray fluids on the guardrails. For this purpose, relevant spraying equipment is required.

[0003] The existing patent number CN219043402U proposes a guardrail surface spraying device, including a base, the upper part of the base is fixedly connected to a motor 1, the output end of the motor 1 is fixedly connected to a rotating rod 1, the outer part of the rotating rod 1 is rotatably connected to a first pulley, the first pulley is rotatably connected to a second pulley through a belt, the inner part of the second pulley is rotatably connected to a rotating rod 2, the outer end of the rotating rod 2 is rotatably connected to a gear, the gear is rotatably connected to a telescopic rod through a rack plate, and the outer side of the telescopic rod is fixedly connected to a fixed plate. In the utility model, the height position of the placement barrel is easy to adjust, which is convenient for spraying guardrails of different heights. The operation is convenient and simple, which improves work efficiency, and the placement barrel is rotated as a whole, so that the spray head can effectively spray the guardrail in all directions, achieving a comprehensive spraying effect.

[0004] However, the above-mentioned type of spraying equipment has the problem of difficulty in spraying the other side of the guardrail. After spraying one side, it is necessary to move to the other side to work again, resulting in poor spraying efficiency. In addition, the position needs to be readjusted when spraying again, which easily leads to problems of uneven spraying and poor effect. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the present invention provides a bridge road guardrail surface spraying device and a method of using the same.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: a bridge road guardrail surface spraying equipment, comprising a mobile platform, a table top is fixedly installed on the top of the mobile platform, a battery compartment for storing and supplying electrical energy is installed on the table top, a control cabinet for assembling control circuit components is installed on the top surface of the battery compartment, paint cans for containing spraying fluid are arranged on both sides of the table top, a paint pump is also installed on the table top, the input port of the paint pump is connected to the paint can through a pipeline, a lifting assembly is arranged on one side of the table top, a retractable and rotatable moving assembly is arranged on the transmission component of the lifting assembly, a nozzle assembly for spraying is installed on the end of the moving assembly, the nozzle assembly is connected to the output port of the paint pump through a hose, and a calibration assembly for calibrating the position of the guardrail is also arranged on one side of the moving assembly.

[0007] As a preferred technical solution of the present invention, the lifting assembly includes a lifting slide, the lifting slide is fixedly installed on the table plate, and a slider is slidably installed on the lifting slide.

[0008] As a preferred technical solution of the present invention, the motion component includes a telescopic electric push rod, which is installed on one side of the slider, and the transmission shaft of the telescopic electric push rod is connected to a connecting frame, and a rotating motor is installed on one side of the bottom end of the connecting frame, and a collar is installed on the side of the rotating motor, and the transmission shaft of the rotating motor passes through the collar, and the side of the collar is open and sleeved with a gear ring, which is semi-annular and can slide in the collar, and a fan-shaped groove is opened on the top surface of the gear ring and gear teeth are arranged in the fan-shaped groove, and the transmission shaft of the rotating motor is connected to a driving gear, and the driving gear is meshed with the gear teeth on the gear ring, and the nozzle assembly is arranged at the end of the gear ring.

[0009] As a preferred technical solution of the present invention, the nozzle assembly includes a second rotating motor, an opening is provided at the bottom of the collar and the second rotating motor is installed at the bottom of the gear ring through the opening, the transmission shaft of the second rotating motor is connected to the rotating frame, and lifting electric push rods are installed on both side ends of the rotating frame, the transmission shaft of the lifting electric push rods is downward and connected to the nozzle frame, a nozzle is slidably installed on the nozzle frame, the nozzle is connected to the output port of the paint pump through a hose, a positioning motor is installed at the bottom of one side of the nozzle frame, the transmission shaft of the positioning motor is upward and connected to the positioning gear, and side gear teeth are provided on the side of the nozzle, and the side gear teeth are meshed with the positioning gear.

[0010] As a preferred technical solution of the present invention, the calibration assembly includes a calibration frame, which is arranged on the front side of the connecting frame in the forward direction of the mobile platform. A clamping electric push rod is installed at the end of the calibration frame, and a clamping claw is connected to the transmission shaft of the clamping electric push rod. A connecting plate is connected to the calibration frame, and the free end of the connecting plate is connected to the gear ring. The corresponding surfaces of the two clamping claws are provided with a plurality of scraping protrusions.

[0011] A method for spraying the surface of a bridge road guardrail, characterized in that it comprises the following steps:

[0012] S1. Drive the mobile platform to move to one side of the bridge road guardrail, and the calibration assembly is located in front of the nozzle assembly in the forward direction.

[0013] S2. Control the extension and retraction of the transmission shaft of the telescopic electric push rod and the sliding of the slider on the lifting slide to adjust the position of the nozzle assembly. Start the clamping electric push rod to drive the clamping claw to clamp the guardrail. Adjust the position of the nozzle under the action of the clamping force so that the guardrail is located between the two nozzles and coaxially. Start the position adjustment motor to control the distance between the nozzle and the guardrail.

[0014] S3. Start the paint pump to inject the spray fluid in the paint tank into the nozzle through the hose, and let the nozzle spray the guardrail. During the spraying process, the mobile platform moves forward to change the spraying position, and the gear ring rotates to change the spraying angle.

[0015] S4. When spraying to the vertical rod position, start the lifting electric push rod to lower the nozzle, start the rotating motor 2 to rotate the rotating frame to spray the inside of the vertical rod, and finally reset it and repeat the spraying of S.

[0016] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0017] 1. During the spraying process, the motion component drives the nozzle to rotate, allowing the nozzle to achieve a complete spraying effect on the guardrail, and the calibration component ensures the accurate positioning of the nozzle and the guardrail, thereby ensuring the consistency of the spraying effect, thereby improving the efficiency and effect of spraying on bridge and road guardrails, and concentrating the spraying range close to the guardrail to avoid waste of spraying fluid and adverse effects on the external environment.

[0018] 2. The telescopic electric push rod starts the extension and retraction of the transmission shaft to adjust the position of the connecting frame, so that the connecting frame drives the nozzle assembly to move back and forth in the lateral direction, and cooperates with the lifting assembly to adjust the upper and lower positions of the nozzle assembly to adapt to the use of bridge and road guardrails in different directions.

[0019] 3. During the spraying process of the nozzle assembly, start the rotating motor to drive the driving gear to rotate, utilize the meshing of the driving gear and the gear ring to make the gear ring slide in the sleeve ring, and then drive the nozzle assembly at the end to adjust the angle to spray at different angles of the guardrail, so as to spray the entire surface of the bridge road guardrail completely, ensuring the efficiency and effect of spraying.

[0020] 4. When the mobile platform moves to the vertical bar position of the guardrail, the nozzle frame and the nozzle are controlled to descend by the lifting electric push rod to spray the vertical bar position of the guardrail, and the rotating motor 2 is controlled to drive the rotating frame to rotate during spraying, so that the nozzle rotates to spray the side of the guardrail vertical bar, thereby achieving complete spraying of the guardrail vertical bar, and further achieving all-round and complete spraying of the bridge road guardrail.

[0021] 5. Start the positioning motor to drive the positioning gear to rotate. The meshing of the positioning gear and the side gear teeth can drive the nozzle to slide on the nozzle rack, thereby adjusting the distance of the nozzle relative to the center position, further adapting to the use of bridge and road guardrails of different diameters, further improving the adaptability to the guardrail, and using the adjustment of the nozzle distance to ensure the spraying effect.

[0022] 6. Control the spacing of the clamping jaws by driving the transmission shaft of the clamping electric push rod to extend and retract. After the clamping jaws correspond to the bridge road guardrail, the bridge road guardrail is clamped by the clamping jaws, thereby stabilizing the relative position of the mobile platform and the road bridge guardrail to avoid problems such as position offset, thereby avoiding the problem of uneven spraying effect. When the lifting assembly and the motion assembly drive the nozzle assembly to move, the calibration assembly will be driven to move through the connecting plate accordingly, so that the calibration assembly corresponds to the road bridge guardrail. Accordingly, when the calibration assembly clamps the bridge road guardrail, the positioning effect of the guardrail will be applied to the gear ring, thereby positioning the distance between the two nozzles relative to the guardrail, further ensuring the spraying effect.

[0023] 7. Extend the transmission shaft of the clamping electric push rod to allow the clamping claws to apply pressure to the guardrail. When the gear ring moves and rotates, the scraping protrusions scrape the surface of the guardrail to clean the loose paint, rust, impurities and other residues on the guardrail to further improve the effect of subsequent spraying operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0025] Figure 2 For the present invention Figure 1 A schematic diagram of the structure on the opposite side of ;

[0026] Figure 3 This is a structural schematic diagram of the present invention with the mobile platform removed;

[0027] Figure 4 It is a structural schematic diagram of the nozzle assembly of the present invention;

[0028] Figure 5 It is a schematic diagram of the structure of the calibration component of the present invention.

[0029] Among them: 10. Mobile platform; 11. Table; 12. Battery compartment; 13. Control cabinet; 14. Paint can; 15. Paint pump; 16. Lifting slide; 17. Sliding block; 18. Telescopic electric push rod; 19. Connecting frame; 20. Rotating motor 1; 21. Ring; 22. Driving gear; 23. Gear ring; 24. Rotating motor 2; 25. Rotating frame; 26. Lifting electric push rod; 27. Spray head frame; 28. Spray head; 29. ​​Positioning gear; 30. Positioning motor; 31. Side gear; 32. Calibration frame; 33. Clamping electric push rod; 34. Clamping claw; 35. Connecting plate; 36. Scraping protrusion. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention. The experimental methods in the following embodiments, unless otherwise specified, are conventional methods, and the materials, reagents, etc. used in the following embodiments, unless otherwise specified, can be obtained from commercial channels.

[0031] Embodiment: Figure 1-5 As shown, a bridge road guardrail surface spraying equipment includes a mobile platform 10. The mobile platform 10 adopts an electric or manual mobile trolley. A table 11 is fixedly installed on the top of the mobile platform 10. A battery compartment 12 for storing and supplying electrical energy is installed on the table 11. A control cabinet 13 for assembling control circuit components is installed on the top surface of the battery compartment 12. Paint cans 14 for containing spraying fluid are arranged on both sides of the table 11. The spraying fluid can be paint, rust remover and other fluids used for guardrail protection. A paint pump 15 is also installed on the table 11. The input port of the paint pump 15 is connected to the paint can 14 through a pipeline. A lifting assembly is arranged on one side of the table 11. A retractable and rotatable moving assembly is arranged on the transmission component of the lifting assembly. A nozzle assembly for spraying is installed at the end of the moving assembly. The nozzle assembly is connected to the output port of the paint pump 15 through a hose. A calibration assembly for calibrating the position of the guardrail is also arranged on one side of the moving assembly.

[0032] Specifically, first control the mobile platform 10 to move to one side of the bridge road guardrail, then locate the position of the guardrail through the calibration component, and then adjust the position of the nozzle assembly through the motion component to make the nozzle assembly correspond to the accurate spraying position, and then perform the spraying. During the spraying process, the motion component drives the nozzle to rotate so that the nozzle can achieve a complete spraying effect on the guardrail, and the calibration component is used to ensure the accurate positioning of the nozzle and the guardrail, thereby ensuring the consistency of the spraying effect, thereby improving the efficiency and effect of spraying the bridge road guardrail, and concentrating the spraying range close to the guardrail to avoid waste of spraying fluid and adverse effects on the external environment. It should be noted that the position control of this implementation is achieved by setting a sensor.

[0033] The lifting assembly includes a lifting slide 16 , which is fixedly mounted on the table 11 . The lifting slide 16 is vertical, and a slider 17 is slidably mounted on the lifting slide 16 .

[0034] Specifically, the upper and lower heights of the nozzle assembly are adjusted by sliding the slider 17 on the lifting slide 16, so that the nozzle can be used to adapt to guardrails of different heights.

[0035] The motion component includes a telescopic electric push rod 18, which is installed on one side of the slider 17. The transmission shaft of the telescopic electric push rod 18 is away from the mobile platform 10. The transmission shaft of the telescopic electric push rod 18 is connected to a connecting frame 19. A rotating motor 20 is installed on one side of the bottom end of the connecting frame 19. A collar 21 is installed on the side of the rotating motor 20. The transmission shaft of the rotating motor 20 passes through the collar 21. The side of the collar 21 is open and is sleeved with a gear ring 23. The gear ring 23 is semi-annular and can slide in the collar 21. The top surface of the gear ring 23 is provided with a fan-shaped groove and gear teeth are provided in the fan-shaped groove. The transmission shaft of the rotating motor 20 is connected to a driving gear 22. The driving gear 22 is meshed with the gear teeth on the gear ring 23, and the nozzle assembly is arranged at the end of the gear ring 23.

[0036] Specifically, the telescopic electric push rod 18 starts the extension and retraction of the transmission shaft to adjust the position of the connecting frame 19, so that the connecting frame 19 drives the nozzle assembly to move back and forth in the lateral direction, and cooperates with the lifting assembly to adjust the up and down position of the nozzle assembly to adapt to the use of bridge and road guardrails in different directions. During the spraying process of the nozzle assembly, the rotating motor 20 is started to drive the active gear 22 to rotate, and the active gear 22 is engaged with the gear ring 23 to allow the gear ring 23 to slide in the sleeve ring 21, thereby driving the nozzle assembly at the end to adjust the angle to spray at different angles of the guardrail, so as to provide a complete spraying of the surface of the complete bridge and road guardrail, thereby ensuring the efficiency and effect of the spraying.

[0037] The nozzle assembly includes a rotating motor 24, an opening is provided at the bottom of the collar 21 and the rotating motor 24 is installed at the bottom of the gear ring 23 through the opening, the transmission shaft of the rotating motor 24 is connected to the rotating frame 25, and lifting electric push rods 26 are installed on both side ends of the rotating frame 25, the transmission shaft of the lifting electric push rod 26 is downwardly connected to the nozzle frame 27, and a nozzle 28 is slidably installed on the nozzle frame 27, and the nozzle 28 is connected to the output port of the paint pump 15 through a hose, and a positioning motor 30 is installed at the bottom of one side of the nozzle frame 27, and the transmission shaft of the positioning motor 30 is upwardly connected to the positioning gear 29, and the side of the nozzle 28 is provided with side gear teeth 31, which mesh with the positioning gear 29.

[0038] Specifically, when the mobile platform 10 moves to the vertical bar position of the guardrail, the nozzle frame 27 and the nozzle 28 are controlled to descend by the lifting electric push rod 26 to spray the vertical bar position of the guardrail, and the rotating motor 24 is controlled to drive the rotating frame 25 to rotate during spraying to rotate the nozzle 28 for spraying the side of the vertical bar of the guardrail, thereby achieving complete spraying of the vertical bar of the guardrail, and further achieving all-round and complete spraying of the bridge road guardrail. The positioning motor 30 is started to drive the positioning gear 29 to rotate, and the engagement of the positioning gear 29 with the side gear teeth 31 can drive the nozzle 28 to slide on the nozzle frame 27, thereby adjusting the distance of the nozzle 28 relative to the center position, further adapting to the use of bridge and road guardrails of different diameters, further improving the adaptability to the guardrail, and using the adjustment of the distance of the nozzle to ensure the spraying effect.

[0039] The calibration assembly includes a calibration frame 32, which is arranged on the front side of the connecting frame 19 in the forward direction of the mobile platform 10. A clamping electric push rod 33 is installed at the end of the calibration frame 32. The transmission shaft of the clamping electric push rod 33 is connected to a fan-shaped clamping claw 34. A connecting plate 35 is connected to the calibration frame 32. The free end of the connecting plate 35 is connected to the gear ring 23. The corresponding surfaces of the two clamping claws 34 are provided with a plurality of scraping protrusions 36.

[0040] Specifically, the transmission shaft of the clamping electric push rod 33 is driven to extend and retract to control the spacing of the clamping claws 34. After the clamping claws 34 correspond to the bridge road guardrail, the bridge road guardrail is clamped by the clamping claws 34, thereby stabilizing the relative position of the mobile platform 10 and the road bridge guardrail to avoid problems such as position offset, thereby avoiding the problem of uneven spraying effect. When the lifting component and the moving component drive the nozzle component to move, the connection plate 35 will correspondingly drive the calibration component to move so that the calibration component corresponds to the road bridge. On the guardrail, accordingly, when the calibration component clamps the bridge road guardrail, the positioning effect of the guardrail will be applied to the toothed ring 23, and then the distance between the two nozzles 28 and the guardrail will be positioned to further ensure the spraying effect. In addition, the transmission shaft of the clamping electric push rod 33 is extended to allow the clamping claw 34 to apply pressure to the guardrail. When the toothed ring 23 moves and rotates, the scraping protrusion 36 scrapes the surface of the guardrail to clean up the loose paint, rust, impurities and other residues on the guardrail, so as to further improve the effect of subsequent spraying operations.

[0041] A method for spraying the surface of a bridge road guardrail, characterized in that it comprises the following steps:

[0042] S1. Drive the mobile platform 10 to move to one side of the bridge road guardrail, and the calibration assembly is located in front of the nozzle assembly in the forward direction.

[0043] S2, control the extension and retraction of the transmission shaft of the telescopic electric push rod 18 and the sliding of the slider 17 on the lifting slide 16 to adjust the position of the nozzle assembly, start the clamping electric push rod 33 to drive the clamping claw 34 to clamp the guardrail, adjust the position of the nozzle 28 under the action of the clamping force, so that the guardrail is located between the two nozzles 28 and coaxial, start the positioning motor 30 to control the distance between the nozzle 28 and the guardrail.

[0044] S3, start the paint pump 15 to inject the spraying fluid in the paint tank 14 into the nozzle 28 through the hose, and let the nozzle 28 spray the guardrail. During the spraying process, the mobile platform 10 moves forward to change the spraying position, and the gear ring 23 rotates to change the spraying angle.

[0045] S4, when spraying to the vertical rod position, start the lifting electric push rod 26 to lower the spray head 28, start the rotating motor 24 to rotate the rotating frame 25 to spray the inside of the vertical rod, and finally reset and repeat the spraying of S3.

[0046] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A bridge road guardrail surface spraying equipment, comprising a mobile platform (10), a table (11) is fixedly installed on the top of the mobile platform (10), a battery compartment (12) for storing and supplying electric energy is installed on the table (11), a control cabinet (13) for assembling control circuit components is installed on the top surface of the battery compartment (12), paint cans (14) for containing spraying fluid are arranged on both sides of the table (11), a paint pump (15) is also installed on the table (11), and the input port of the paint pump (15) is connected to the paint can (14) through a pipeline, characterized in that: A lifting assembly is arranged on one side of the platform (11), a retractable and rotatable moving assembly is arranged on the transmission component of the lifting assembly, a nozzle assembly for spraying is installed at the end of the moving assembly, and the nozzle assembly is connected to the output port of the paint pump (15) through a hose, and a calibration assembly for calibrating the position of the guardrail is also arranged on one side of the moving assembly.

2. The surface spraying equipment for bridge and road guardrail according to claim 1 is characterized in that: The lifting assembly comprises a lifting slide (16), the lifting slide (16) is fixedly mounted on the table (11), and a slider (17) is slidably mounted on the lifting slide (16).

3. The surface spraying equipment for bridge and road guardrail according to claim 2 is characterized in that: The motion assembly comprises a telescopic electric push rod (18), which is mounted on one side of a slider (17); a transmission shaft of the telescopic electric push rod (18) is connected to a connecting frame (19); a rotating motor (20) is mounted on one side of the bottom end of the connecting frame (19); a collar (21) is mounted on the side of the rotating motor (20); a transmission shaft of the rotating motor (20) passes through the collar (21); a side of the collar (21) is open and sleeved with a gear ring (23); the gear ring (23) is semi-annular and can slide in the collar (21); a fan-shaped groove is formed on the top surface of the gear ring (23) and gear teeth are arranged in the fan-shaped groove; the transmission shaft of the rotating motor (20) is connected to a driving gear (22); the driving gear (22) meshes with the gear teeth on the gear ring (23); and a nozzle assembly is arranged at the end of the gear ring (23).

4. The surface spraying equipment for bridge and road guardrail according to claim 3 is characterized in that: The spray head assembly comprises a second rotating motor (24), an opening is provided at the bottom of the collar (21) and the second rotating motor (24) is installed at the bottom of the gear ring (23) through the opening, the transmission shaft of the second rotating motor (24) is connected to a rotating frame (25), both side ends of the rotating frame (25) are installed with lifting electric push rods (26), the transmission shaft of the lifting electric push rods (26) is downwardly connected to a spray head frame (27), a spray head (28) is slidably installed on the spray head frame (27), and the spray head (28) is connected to the output port of the paint pump (15) through a hose.

5. The surface spraying equipment for bridge and road guardrail according to claim 4 is characterized in that: A positioning motor (30) is installed at the bottom of one side of the nozzle frame (27), the transmission shaft of the positioning motor (30) is upwardly connected to a positioning gear (29), and side gear teeth (31) are provided on the side of the nozzle (28), and the side gear teeth (31) are meshed with the positioning gear (29).

6. The surface spraying equipment for bridge and road guardrail according to claim 4 is characterized in that: The calibration assembly comprises a calibration frame (32), which is arranged at the front side of a connecting frame (19) in the forward direction of the mobile platform (10), and a clamping electric push rod (33) is installed at the end of the calibration frame (32), and a transmission shaft of the clamping electric push rod (33) is connected to a clamping claw (34).

7. The surface spraying equipment for bridge and road guardrail according to claim 6 is characterized in that: The calibration frame (32) is connected to a connecting plate (35), the free end of the connecting plate (35) is connected to the gear ring (23), and the corresponding surfaces of the two clamping jaws (34) are provided with a plurality of scraping protrusions (36).

8. A method for spraying the surface of a bridge road guardrail, characterized in that: The steps include: S1, driving the mobile platform (10) to move to one side of the bridge road guardrail, with the calibration component being located in front of the nozzle component in the forward direction; S2, controlling the extension and retraction of the transmission shaft of the telescopic electric push rod (18) and the sliding of the slider (17) on the lifting slide (16) to adjust the position of the nozzle assembly, starting the clamping electric push rod (33) to drive the clamping claw (34) to clamp the guardrail, adjusting the position of the nozzle (28) under the action of the clamping force, so that the guardrail is located between the two nozzles (28) and coaxially, and starting the position adjustment motor (30) to control the distance between the nozzle (28) and the guardrail; S3, starting the paint pump (15) to inject the spraying fluid in the paint tank (14) into the spray head (28) through the hose, allowing the spray head (28) to spray the guardrail. During the spraying process, the mobile platform (10) moves forward to change the spraying position, and the gear ring (23) rotates to change the spraying angle; S4, when spraying to the vertical rod position, start the lifting electric push rod (26) to let the spray head (28) descend, start the second rotating motor (24) to let the rotating frame (25) rotate to spray the inside of the vertical rod, and finally reset, repeat the spraying of S (3).

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