Blank paint spraying device and method for casting of steel billet continuous casting machine

Abstract

The invention relates to the technical field of casting spraying, and provides a blank paint spraying device and method.The blank paint spraying device for the casting of the steel billet continuous casting machine comprises an anti-splashing mechanism, a ventilation cooling mechanism and a nozzle cleaning mechanism, the anti-splashing mechanism is used for shielding part of splashed metal during number spraying, and the ventilation cooling mechanism is used for cooling the part of splashed metal during number spraying; an electrode nozzle and a compressed air pipe are arranged on the front gun body, the ventilation cooling mechanism comprises an air guide pipe and is used for cooling the electrode nozzle when number spraying is not carried out, the nozzle cleaning mechanism is used for cleaning metal drops on the electrode nozzle and the compressed air pipe, and the nozzle cleaning mechanism comprises a butt joint cylinder; by means of the technical scheme, the problems that in the prior art, when number spraying is conducted on steel billets traditionally, the cooling efficiency of an electric arc number spraying machine is low, and the service life of part of parts on the electric arc number spraying machine can be possibly affected are solved.

Description

Technical Field

[0001] The invention relates to the technical field of casting spraying, and in particular to a blank spraying device and method for castings of a steel billet continuous casting machine. Background Art

[0002] When a continuous casting machine casts steel plates, it will first be made into long billets, which will then be cut and then heated, cut and processed. After the billets are made, numbers will be sprayed on the sides of the billets for the convenience of statistics and records. When the billets are sprayed with numbers during transportation on the conveyor, arc spraying machines are often used to spray numbers on the sides of the billets. In order not to affect the subsequent slitting and casting, the spraying numbers are mostly achieved through spraying machines. The arc spraying machine is set on the side of the billet through a robotic arm or a slide rail. When the billet moves to the side of the arc spraying machine, The arc spraying machine is used for spraying. The principle of the arc spraying machine is to set up two electrode nozzles. Each of the two electrode nozzles conveys the welding wire forward through a wire feeding device. The welding wire passes through the current transmitted by the electrode nozzle. The two welding wires contact to cause a short circuit and arc to form high-temperature molten droplets. After that, the high-pressure compressed air is blown to atomize or re-atomize the high-temperature molten droplets. The atomized metal forms high-speed flying particles under the drive of compressed air. After the particles hit the surface of the material to be sprayed, they adhere and solidify to form a metal layer. The number sprayed in this way is relatively strong and not easy to be damaged.

[0003] According to the structure of the spray marking machine, it can be divided into two parts, one part is the front gun body, on which a high-pressure gas nozzle and an electrode nozzle are arranged, and the other part is the rear gun body, on which a wire feeding device and an air intake pipe are arranged, which provide current to the electrode nozzle and is connected to a robot arm and other action devices. When spraying, the action device drives the rear gun body to move, and the front gun body is close to the billet for spraying. During spraying, high temperature will be generated at the electrode nozzle, and the billet also has a high temperature. When not spraying, the spray marking machine needs to be cooled down. The traditional way of cooling the spray marking machine is to cool it down by standing still. This cooling method is less efficient. At the same time, part of the splashed atomized metal will also adhere to the front gun body, which is difficult to clean after cooling. Inadequate cooling for a long time may cause the electrode nozzle to be blocked, or the electrode nozzle to be damaged by continuous high temperature. Summary of the invention

[0004] The present invention provides a blank painting device and method for steel billet continuous casting machine castings, which solves the problem in the related art that when spraying steel billets in the traditional way, the cooling efficiency of the arc spraying machine is low, which may affect the service life of some parts of the arc spraying machine.

[0005] The technical solution of the present invention is as follows: A blank painting device for castings of a steel billet continuous casting machine comprises a mechanical arm, a rear gun body is fixedly connected to the mechanical arm, a front gun body is fixedly connected to the rear gun body, an anti-splash mechanism, a ventilation cooling mechanism and a nozzle cleaning mechanism are also included, the anti-splash mechanism is fixedly connected to a conveying device, the anti-splash mechanism is arranged on the side of the steel billet, the anti-splash mechanism is detachably connected to the front gun body, the anti-splash mechanism is used to shield part of the splashed metal when spraying, the front gun body is provided with an electrode nozzle and a compressed air pipe, the ventilation cooling mechanism is arranged on the front gun body, the The ventilation and cooling mechanism includes an air duct, which is connected to the compressed air pipe. The ventilation and cooling mechanism is used to cool the electrode nozzle when no spraying is performed. The nozzle cleaning mechanism is arranged on the side of the robotic arm. The nozzle cleaning mechanism is detachably connected to the front gun body. The nozzle cleaning mechanism is used to clean metal droplets on the electrode nozzle and the compressed air pipe, wherein the nozzle cleaning mechanism includes a docking sleeve, which is detachably connected to the front gun body. A cleaning sleeve is fixedly connected to the docking sleeve, and the electrode nozzle can be inserted into the cleaning sleeve.

[0006] The anti-splash mechanism includes a docking frame, a compression cylinder and a shielding ring. The docking frame is fixedly connected to the conveying device. The compression cylinders are arranged in plurality. The plurality of compression cylinders are rotatably connected to the docking frame. The shielding ring is rotatably connected to the output ends of the plurality of compression cylinders. The plurality of compression cylinders are arranged around the shielding ring. A through hole is opened in the center of the shielding ring. The front gun body can extend into the through hole in the center of the shielding ring.

[0007] The front gun body is provided with a compression nozzle, a side exhaust port and a sealing slider, a compression nozzle is provided on the end of the compression air pipe away from the rear gun body, the side exhaust port is opened on the side of the front gun body, the side exhaust port is connected with the air guide pipe, the side exhaust port and the air guide pipe are respectively provided with two, the side exhaust port and the electrode nozzle are staggered, the sealing slider is provided with two, the sealing slider is slidably arranged in the air guide pipe, the sealing slider and the side exhaust port are detachably connected, two branch flow holes are provided on the compression nozzle, a branch flow bar is fixedly connected on the side of the sealing slider close to the compression nozzle, the branch flow bar passes through the branch flow hole, the branch flow bars on the two sealing sliders can contact each other in the compression nozzle, when the two branch flow bars are in contact, the sealing slider is separated from the side exhaust port, and the side of the branch flow bar close to the rear gun body is set to a cone.

[0008] Two docking grooves are provided on the side of the front gun body, and the two docking grooves are respectively connected with the two side exhaust ports. When the sealing slider is connected with the side exhaust ports, a pulling groove is provided on the sealing slider at a position in the docking groove.

[0009] The nozzle cleaning mechanism also includes a guide component, a threaded strip, a brush head and a motor. Two guide components are provided, and the two guide components are arranged opposite to each other on the docking tube. The guide component is used to drive the sealing slider to move, the threaded strip is fixedly connected to the inner wall of the cleaning tube, the brush head is rotatably connected in the cleaning tube, and the output end of the motor is fixedly connected to the brush head.

[0010] The guide assembly includes a driving cylinder and a guide groove, the driving cylinder is fixedly installed on the docking cylinder, a clamp is fixedly connected to the output end of the driving cylinder, the clamp can be extended into the docking groove, the clamp is detachably connected to the pulling groove, the guide groove is opened on the docking cylinder, the guide groove is connected to the cleaning cylinder, the guide groove is arranged on the side of the side exhaust port, the cleaning cylinder is provided with an exhaust port, a guide frame is fixedly connected between the cleaning cylinder and the motor, and the cleaning cylinder is connected to the cleaning cylinder through the exhaust port.

[0011] A method for painting a blank for a steel billet continuous casting machine casting, using the above-mentioned device for painting a blank for a steel billet continuous casting machine casting, comprises the following steps: Step 1: Gun body docking: the mechanical arm drives the front gun body to move, and inserts the front gun body into the through hole in the center of the shielding ring; Step 2: Steel billet spraying: the mechanical arm drives the front gun body to move along the trajectory of the sprayed characters, and the front gun body drives the shielding ring to move, and simultaneously stretches and compresses the plurality of compression cylinders; Step 3: Cleaning the front gun body: After the mechanical arm drives the front gun body to separate from the shielding ring, the front gun body is inserted into the docking tube so that the driving cylinder is aligned with the docking groove; Step 4: docking of the card: the output end of the driving cylinder is shortened, and the pulling groove moves to the side of the card close to the cleaning cylinder. At this time, the output end of the driving cylinder is extended to push the card into the docking groove, and the mechanical arm pulls the front gun body toward the outside of the docking cylinder, and the card docks with the pulling groove; Step 5, gas exchange: the output end of the driving cylinder is extended to push the sealing slider to slide in the air duct, so that the air duct is connected with the side exhaust port, and the two diversion bars are connected to each other through the diversion flow hole; Step 6, air flow purging: the gas in the compression nozzle passes through the diversion bar and is sprayed toward the two electrode nozzles respectively, part of the gas in the compression air pipe enters the guide groove through the air guide pipe and the side exhaust port, and the air flow enters the cleaning cylinder and contacts the electrode nozzle; Step 7, removing impurities: the output end of the motor drives the brush head to rotate to clean the electrode nozzle and the compression nozzle, and the impurities are ejected into the guide frame through the exhaust port along with the air flow.

[0012] The working principle and beneficial effects of the present invention are: 1. In the present invention, a diverter bar and a sealing slider are provided. When the two diverter bars are in contact, the sealing slider is separated from the side exhaust port. The side of the diverter bar close to the rear gun body is set to be conical. The compressed air pipe is connected with the two air guide pipes. When the sealing slider is fitted with the side exhaust port, the gas in the compressed air pipe cannot flow into the air guide pipe and will be sprayed out through the compressed air nozzle, and the air pressure will push the sealing slider to fit tightly with the side exhaust port. When the sealing slider is pushed by the clamp and separated from the side exhaust port, part of the gas in the compressed air pipe will flow to the two air guide pipes and be discharged obliquely through the side exhaust port. At the same time, the diverter bar extends into the compression nozzle through the diverter flow hole and fits with it. The diverter baffle is between the two electrode nozzles. At this time, the airflow sprayed through the compression nozzle will be separated to both sides by the diverter baffle, and the airflow on both sides will be sprayed to the electrode nozzle, so that the airflow can cool the electrode nozzle in a targeted manner. 2. In the present invention, a brush head and a cleaning cylinder are provided. After the electrode nozzle is inserted into the cleaning cylinder, the output end of the motor can drive the brush head to rotate to clean the dust covered on the electrode nozzle and the attached metal droplets. Sweeping off the metal droplets is beneficial to increasing the service life of the electrode nozzle. The airflow discharged from the side exhaust port enters the cleaning cylinder through the guide groove. The airflow rotates with the threaded strip. At the same time, the airflow can drive the dust and other impurities brushed by the brush head to enter the guide frame through the exhaust port to prevent the exhaust gas from being discharged to the surroundings. 3. In the present invention, by providing a ventilation cooling mechanism, the compressed gas in the compressed air pipe can be used to perform targeted spraying on the electrode nozzle. By providing a nozzle cleaning mechanism, the electrode nozzle can be cleaned while being cooled by airflow, and impurities such as dust can be discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is another perspective structural schematic diagram of the whole of the present invention; Figure 3 It is a partial cross-sectional structural schematic diagram of the anti-splash mechanism in the present invention; Figure 4 It is a partial structural schematic diagram of the front gun body in the present invention; Figure 5 It is a schematic cross-sectional structural diagram of the front gun body in the present invention; Figure 6 It is a schematic cross-sectional structure diagram of the front gun body of the present invention from another viewing angle; Figure 7 It is a partial structural schematic diagram of the nozzle cleaning mechanism and the front gun body in the present invention; Figure 8 It is a schematic diagram of the internal partial cross-sectional structure of the docking cylinder and the cleaning cylinder in the present invention; Fig. 9 It is a schematic diagram of the partial cross-sectional structure of the cooperation between the flow guide component and the sealing slider in the present invention.

[0015] In the figure: 1. Robotic arm; 2. Rear gun body; 3. Front gun body; 4. Electrode nozzle; 5. Compressed air pipe; 6. Air guide pipe; 7. Docking tube; 8. Cleaning tube; 9. Docking frame; 10. Compression cylinder; 11. Shielding ring; 12. Compression nozzle; 13. Side exhaust port; 14. Sealing slider; 15. Diversion hole; 16. Diversion bar; 17. Docking groove; 18. Pulling groove; 19. Threaded strip; 20. Brush head; 21. Motor; 22. Drive cylinder; 23. Clamp; 24. Guide groove; 25. Exhaust port; 26. Guide frame. DETAILED DESCRIPTION

[0016] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] Embodiment 1, as Figures 1 to 9As shown, this embodiment proposes a blank painting device for castings of a billet continuous casting machine, comprising a mechanical arm 1, a rear gun body 2 is fixedly connected to the mechanical arm 1, a front gun body 3 is fixedly connected to the rear gun body 2, and also includes an anti-splash mechanism, a ventilation cooling mechanism and a nozzle cleaning mechanism, the anti-splash mechanism is fixedly connected to the conveying device, the anti-splash mechanism is arranged on the side of the billet, the anti-splash mechanism is detachably connected to the front gun body 3, the anti-splash mechanism is used to shield part of the splashed metal when spraying, the front gun body 3 is provided with an electrode nozzle 4 and a compressed air pipe 5, the ventilation cooling mechanism is arranged on the front gun body 3, the ventilation cooling mechanism includes an air guide pipe 6, and the air guide pipe 6 is connected to the compressed air pipe 5, The ventilation cooling mechanism is used to cool the electrode nozzle 4 when no spraying is performed. The nozzle cleaning mechanism is arranged on the side of the robot arm 1. The nozzle cleaning mechanism is detachably connected to the front gun body 3. The nozzle cleaning mechanism is used to clean metal droplets on the electrode nozzle 4 and the compressed air pipe 5. The nozzle cleaning mechanism includes a docking sleeve 7, which is detachably connected to the front gun body 3. A cleaning sleeve 8 is fixedly connected to the docking sleeve 7. The electrode nozzle 4 can be inserted into the cleaning sleeve 8. The compressed air pipe 5 is connected to an external air pump through the rear gun body 2. The wire feeding device in the rear gun body 2 transports the welding wire through the electrode nozzle 4. At the same time, a stable current is passed to the electrode nozzle 4 through an external power supply device.

[0018] like Figures 1 to 3 As shown, the anti-splash mechanism includes a docking frame 9, a compression cylinder 10 and a shielding ring 11. The docking frame 9 is fixedly connected to the conveying device. After the compression cylinder 10 is set, multiple compression cylinders 10 are rotatably connected to the docking frame 9. The shielding ring 11 is rotatably connected to the output ends of the multiple compression cylinders 10. The multiple compression cylinders 10 are arranged around the shielding ring 11. A through hole is opened in the center of the shielding ring 11. The front gun body 3 can be extended into the through hole in the center of the shielding ring 11. The traditional arc spraying machine is provided with a shielding ring 11 on the front gun body 3. The shielding ring 11 moves with the front gun body 3, making it inconvenient to clean the front gun body 3. The front gun body 3 is docked with the shielding ring 11. At this time, the shielding ring 11 can shield the splash of atomized metal. When the front gun body 3 moves, the four compression cylinders 10 shrink or extend accordingly. A spring or gas is provided in the compression cylinder 10. After the front gun body 3 is separated from the shielding ring 11, the compression cylinder 10 pushes the shielding ring 11 to maintain a central position on the docking frame 9.

[0019] like Figures 3 to 6As shown, the front gun body 3 is provided with a compression nozzle 12, a side exhaust port 13 and a sealing slider 14, the compression nozzle 12 is arranged on the end of the compression air pipe 5 away from the rear gun body 2, the side exhaust port 13 is opened on the side of the front gun body 3, the side exhaust port 13 is connected with the air guide pipe 6, the side exhaust port 13 and the air guide pipe 6 are respectively provided with two, the side exhaust port 13 and the electrode nozzle 4 are staggered, two sealing sliders 14 are provided, the sealing slider 14 is slidably arranged in the air guide pipe 6, the sealing slider 14 and the side exhaust port 13 are detachably connected, two branch flow holes 15 are arranged on the compression nozzle 12, and a branching bar 16 is fixedly connected to the side of the sealing slider 14 close to the compression nozzle 12, the branching bar 16 passes through the branch flow hole 15, the branching bars 16 on the two sealing sliders 14 can contact each other in the compression nozzle 12, and when the two branching bars 16 contact, the sealing slider The block 14 is separated from the side exhaust port 13, and the side of the diverter strip 16 close to the rear gun body 2 is set to be conical. The compressed air pipe 5 is connected with the two air guide pipes 6. When the sealing slider 14 is in contact with the side exhaust port 13, the gas in the compressed air pipe 5 cannot flow into the air guide pipe 6, and will be sprayed out through the compressed air nozzle, and the air pressure will push the sealing slider 14 to fit tightly with the side exhaust port 13. When the sealing slider 14 is pushed by the clamp 23 and separated from the side exhaust port 13, part of the gas in the compressed air pipe 5 will flow to the two air guide pipes 6 and be discharged obliquely through the side exhaust port 13. At the same time, the diverter strip 16 extends into the compression nozzle 12 through the diverter flow hole 15 and fits together. The diverter baffle is between the two electrode nozzles 4. At this time, the airflow sprayed through the compression nozzle 12 will be separated to both sides by the diverter baffle, and the airflow on both sides will be sprayed to the electrode nozzle 4, so that the airflow can cool the electrode nozzle 4 in a targeted manner.

[0020] like Figures 4 to 9 As shown, two docking grooves 17 are provided on the side of the front gun body 3, and the two docking grooves 17 are respectively connected to the two side exhaust ports 13. When the sealing slider 14 is connected to the side exhaust port 13, a pulling groove 18 is provided on the sealing slider 14 at a position in the docking groove 17. When the front gun body 3 is extended into the docking tube 7, the clamp 23 can be extended into the docking groove 17. By moving the front gun body 3 so that the three hook-shaped parts of the clamp 23 hook the pulling groove 18, the driving cylinder 22 can drive the sealing slider 14 to slide. Pushing the sealing slider 14 toward the compression nozzle 12 can connect the side exhaust port 13 with the compressed air pipe 5. After cooling, the driving cylinder 22 can pull the sealing slider 14 to dock with the side exhaust port 13, and spraying can be carried out at this time.

[0021] like Figures 7 to 9As shown, the nozzle cleaning mechanism also includes a guide component, a threaded strip 19, a brush head 20 and a motor 21. Two guide components are provided, and the two guide components are arranged oppositely on the docking tube 7. The guide component is used to drive the sealing slider 14 to move. The threaded strip 19 is fixedly connected to the inner wall of the cleaning tube 8. The brush head 20 is rotatably connected in the cleaning tube 8. The output end of the motor 21 is fixedly connected to the brush head 20. After the electrode nozzle 4 is extended into the cleaning tube 8, the output end of the motor 21 can drive the brush head 20 to rotate to clean the dust covering the electrode nozzle 4 and the attached metal droplets. Sweeping off the metal droplets is beneficial to increasing the service life of the electrode nozzle 4.

[0022] like Figures 7 to 9 As shown, the guide assembly includes a driving cylinder 22 and a guide groove 24. The driving cylinder 22 is fixedly mounted on the docking tube 7. A clamp 23 is fixedly connected to the output end of the driving cylinder 22. The clamp 23 can extend into the docking groove 17. The clamp 23 is detachably connected to the pulling groove 18. The guide groove 24 is provided on the docking tube 7. The guide groove 24 is connected to the cleaning tube 8. The guide groove 24 is arranged on the side of the side exhaust port 13. An exhaust port 25 is provided on the cleaning tube 8. A guide frame 26 is fixedly connected between the cleaning tube 8 and the motor 21. The cleaning tube 8 is connected to the cleaning tube 8 through the exhaust port 25. The airflow discharged from the side exhaust port 13 enters the cleaning tube 8 through the guide groove 24. The airflow rotates with the threaded strip 19. At the same time, the airflow can drive the dust and other impurities brushed off by the brush head 20 to enter the guide frame 26 through the exhaust port 25 to prevent the exhaust gas from being discharged to the surroundings.

[0023] In this embodiment, the steel billet can be sprayed after the front gun body 3 is docked with the shielding ring 11, and the shielding ring 11 shields the front gun body 3. When cleaning the electrode nozzle 4 and the compression nozzle 12, the high-pressure gas in the compressed air pipe 5 can be used to cool down. By opening the side exhaust port 13, the gas enters the cleaning cylinder 8 through the guide groove 24 and rotates around the electrode nozzle 4. While cooling the electrode nozzle 4, dust can be removed. The gas sprayed from the compression nozzle 12 is divided by the diversion bar 16 and sprayed to both sides, and the inner side of the electrode nozzle 4 is sprayed for cooling.

[0024] Embodiment 2: Embodiment 2 of the present application is supplemented on the basis of Embodiment 1 and is a method for spraying paint on a blank for a steel billet continuous casting machine casting: Step 1: Gun body docking: The mechanical arm 1 drives the front gun body 3 to move, and inserts the front gun body 3 into the through hole in the center of the shielding ring 11; Step 2: Steel billet spraying: The robot arm 1 drives the front gun body 3 to move along the trajectory of the sprayed characters, and the front gun body 3 drives the shielding ring 11 to move, and simultaneously stretches and compresses the multiple compression cylinders 10; Step 3: Cleaning the front gun body 3: After the robotic arm 1 drives the front gun body 3 to separate from the shielding ring 11, the front gun body 3 is inserted into the docking tube 7 so that the driving cylinder 22 is aligned with the docking groove 17; Step 4: docking of the clamp 23: the output end of the drive cylinder 22 is shortened, and the pulling groove 18 moves to the side of the clamp 23 close to the cleaning cylinder 8. At this time, the output end of the drive cylinder 22 is extended to push the clamp 23 into the docking groove 17, and the robot arm 1 pulls the front gun body 3 to move toward the outside of the docking cylinder 7, and the clamp 23 docks with the pulling groove 18; Step 5, gas exchange: the output end of the driving cylinder 22 extends to push the sealing slider 14 to slide in the air duct 6, so that the air duct 6 is connected with the side exhaust port 13, and the two diversion bars 16 are connected through the diversion flow hole 15; Step 6, air purge: The gas in the compression nozzle 12 passes through the diversion bar 16 and is sprayed toward the two electrode nozzles 4 respectively. Part of the gas in the compressed air pipe 5 enters the guide groove 24 through the air guide pipe 6 and the side exhaust port 13. The air flow enters the cleaning cylinder 8 and contacts the electrode nozzle 4. Step 7, removing impurities: the output end of the motor 21 drives the brush head 20 to rotate to clean the electrode nozzle 4 and the compression nozzle 12, and the impurities are ejected into the guide frame 26 through the exhaust port 25 along with the air flow.

[0025] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A blank painting device for a steel billet continuous casting machine casting, comprising a mechanical arm (1), a rear gun body (2) being fixedly connected to the mechanical arm (1), a front gun body (3) being fixedly connected to the rear gun body (2), and characterized in that: Also includes: An anti-splash mechanism, the anti-splash mechanism is fixedly connected to the conveying device, the anti-splash mechanism is arranged on the side of the steel billet, the anti-splash mechanism is detachably connected to the front gun body (3), and the anti-splash mechanism is used to shield part of the splashed metal during spraying; The front gun body (3) is provided with an electrode nozzle (4) and a compressed air pipe (5); A ventilation cooling mechanism, the ventilation cooling mechanism being arranged on the front gun body (3), the ventilation cooling mechanism comprising an air guide pipe (6), the air guide pipe (6) being connected to the compressed air pipe (5), the ventilation cooling mechanism being used to cool the electrode nozzle (4) when spraying is not being performed; a nozzle cleaning mechanism, the nozzle cleaning mechanism being arranged on the side of the mechanical arm (1), the nozzle cleaning mechanism being detachably connected to the front gun body (3), and the nozzle cleaning mechanism being used to clean metal droplets on the electrode nozzle (4) and the compressed air pipe (5); Wherein, the nozzle cleaning mechanism comprises: A docking tube (7), the docking tube (7) being detachably connected to the front gun body (3), a cleaning tube (8) being fixedly connected to the docking tube (7), and the electrode nozzle (4) being able to extend into the cleaning tube (8).

2. A blank painting device for castings of a steel billet continuous casting machine according to claim 1, characterized in that: The anti-splash mechanism comprises: A docking frame (9), the docking frame (9) being fixedly connected to the conveying device; A compression cylinder (10), wherein a plurality of the compression cylinders (10) are provided, and the plurality of compression cylinders (10) are rotatably connected to the docking frame (9); A shielding ring (11), the shielding ring (11) is rotatably connected to the output ends of the plurality of compression cylinders (10), the plurality of compression cylinders (10) are arranged around the shielding ring (11), a through hole is provided in the center of the shielding ring (11), and the front gun body (3) can extend into the through hole in the center of the shielding ring (11).

3. A blank painting device for castings of a steel billet continuous casting machine according to claim 2, characterized in that: The front gun body (3) is provided with: A compression nozzle (12), wherein the compression nozzle (12) is arranged on an end of the compression air pipe (5) away from the rear gun body (2); A side exhaust port (13), the side exhaust port (13) being opened on the side of the front gun body (3), the side exhaust port (13) being connected to the air guide pipe (6), two side exhaust ports (13) and two air guide pipes (6) are each provided, and the side exhaust port (13) and the electrode nozzle (4) are arranged in a staggered manner; A sealing slider (14), wherein two sealing sliders (14) are provided, the sealing sliders (14) are slidably arranged in the air guide pipe (6), and the sealing sliders (14) are detachably connected to the side exhaust port (13).

4. A blank painting device for castings of a steel billet continuous casting machine according to claim 3, characterized in that: The compression nozzle (12) is provided with two diversion holes (15); a diversion bar (16) is fixedly connected to a side of the sealing slider (14) close to the compression nozzle (12); the diversion bar (16) passes through the diversion hole (15); the diversion bars (16) on the two sealing sliders (14) can contact each other in the compression nozzle (12); when the two diversion bars (16) contact each other, the sealing slider (14) is separated from the side exhaust port (13).

5. A blank painting device for castings of a steel billet continuous casting machine according to claim 4, characterized in that: The side of the diversion bar (16) close to the rear gun body (2) is configured to be conical.

6. A blank painting device for castings of a steel billet continuous casting machine according to claim 5, characterized in that: The front gun body (3) has two docking grooves (17) on the side thereof, the two docking grooves (17) being respectively connected to the two side exhaust ports (13); when the sealing slider (14) is in contact with the side exhaust ports (13), a pulling groove (18) is provided on the sealing slider (14) at a position in the docking groove (17).

7. A blank painting device for castings of a steel billet continuous casting machine according to claim 6, characterized in that: The nozzle cleaning mechanism also includes: A flow guide assembly, wherein two flow guide assemblies are provided, and the two flow guide assemblies are arranged on the docking tube (7) in opposite directions, and the flow guide assemblies are used to drive the sealing slider (14) to move; A threaded strip (19), the threaded strip (19) being fixedly connected to the inner wall of the cleaning cylinder (8); A brush head (20), the brush head (20) being rotatably connected in the cleaning cylinder (8); A motor (21), wherein an output end of the motor (21) is fixedly connected to the brush head (20).

8. A blank painting device for castings of a steel billet continuous casting machine according to claim 7, characterized in that: The flow guide assembly comprises: A driving cylinder (22), the driving cylinder (22) being fixedly mounted on the docking tube (7), a clamping member (23) being fixedly connected to an output end of the driving cylinder (22), the clamping member (23) being capable of extending into the docking groove (17), and the clamping member (23) being detachably connected to the pulling groove (18); A guide groove (24), the guide groove (24) being provided on the docking tube (7), the guide groove (24) being connected to the cleaning tube (8), and the guide groove (24) being arranged on the side of the side exhaust port (13).

9. A blank painting device for castings of a steel billet continuous casting machine according to claim 8, characterized in that: An exhaust port (25) is provided on the cleaning cylinder (8), a guide frame (26) is fixedly connected between the cleaning cylinder (8) and the motor (21), and the cleaning cylinder (8) is connected to the cleaning cylinder (8) via the exhaust port (25).

10. A method for painting a blank for a steel billet continuous casting machine casting, using the device for painting a blank for a steel billet continuous casting machine casting according to claim 9, characterized in that: The following steps are involved: S1, gun body docking: the mechanical arm (1) drives the front gun body (3) to move, and inserts the front gun body (3) into the through hole in the center of the shielding ring (11); S2, steel billet spraying: the mechanical arm (1) drives the front gun body (3) to move along the trajectory of the sprayed characters, and the front gun body (3) drives the shielding ring (11) to move, and simultaneously stretches and compresses the plurality of compression cylinders (10); S3, cleaning the front gun body (3): after the mechanical arm (1) drives the front gun body (3) to separate from the shielding ring (11), the front gun body (3) is inserted into the docking tube (7) so that the driving cylinder (22) is aligned with the docking groove (17); S4, docking of the clamp (23): the output end of the driving cylinder (22) is shortened, and the pulling groove (18) moves to the side of the clamp (23) close to the cleaning cylinder (8). At this time, the output end of the driving cylinder (22) is extended to push the clamp (23) into the docking groove (17), and the mechanical arm (1) pulls the front gun body (3) toward the outside of the docking cylinder (7), and the clamp (23) docks with the pulling groove (18); S5, gas exchange: the output end of the driving cylinder (22) is extended to push the sealing slider (14) to slide in the air guide pipe (6), so that the air guide pipe (6) is connected to the side exhaust port (13), and the two flow diversion bars (16) are connected to each other through the diversion flow hole (15); S6, air flow purging: the gas in the compression nozzle (12) passes through the diversion bar (16) and is sprayed toward the two electrode nozzles (4) respectively, part of the gas in the compression air pipe (5) enters the guide groove (24) through the air guide pipe (6) and the side exhaust port (13), and the air flow enters the cleaning cylinder (8) and contacts the electrode nozzles (4); S7, removing impurities: the output end of the motor (21) drives the brush head (20) to rotate to clean the electrode nozzle (4) and the compression nozzle (12), and the impurities are ejected into the guide frame (26) through the exhaust port (25) along with the air flow.

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