A road marking device

Abstract

This utility model discloses a road marking device, relating to the technical field of marking devices. The utility model includes a platform, a tank, and a feeding pump. Two L-shaped threaded blocks are arranged on the left side of the platform. The utility model uses an output motor and a first lead screw to retract the adjusting frame. Simultaneously, a second lead screw, a fixed cylinder, and a rectangular piston apply pressure to the main pipe. The pressure within the main pipe forces the slurry through the hose and branch pipe sequentially and out of the nozzle, thus preventing residual slurry from solidifying and clogging, which would affect subsequent use. The number of hoses and nozzles connected can be controlled by adjusting the motor, threaded rod, circular piston, and rectangular blocks, thereby adjusting the marking width. This allows for simultaneous adjustment of the marking width on both sides under various marking spacings, effectively avoiding impacts on marking quality and efficiency caused by lifting, disassembly, replacement, or repeated adjustments.

Description

Technical Field

[0001] This utility model relates to the field of road marking device technology, specifically to a road marking device. Background Technology

[0002] As cities develop, roads and vehicles increase. To ensure vehicles travel in accordance with regulations, road marking devices are needed to regulate traffic and ensure orderly travel.

[0003] The prior art patent CN222730313U discloses a road marking construction device. This device uses a vehicle platform, tank, feed pump, diverter block, transfer pipe, moving block, guide block, limit block, drive rod, nozzle, transfer block, positioning seat, driven rod, screw, and motor to adjust the distance between the nozzles at both ends. This allows for adjustment based on different road widths and the spacing between the two markings. However, it lacks a processing device. When marking is completed, residual slurry remains in the diverter block and third guide pipe. If not cleaned promptly, it can easily cool and solidify, affecting future use. Furthermore, the nozzle size is fixed, making it impossible to adjust the marking width. Some devices adjust the width by raising or replacing the nozzles, but raising the nozzles increases the susceptibility to environmental factors such as wind direction, temperature, and humidity during marking, leading to a decrease in marking quality. Replacing the nozzles requires repeated disassembly and installation, which can affect marking efficiency and makes the device inconvenient to use. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a road marking device that solves the issues of lacking a processing device, making it difficult to clean residual slurry in the diverting block and third conduit in a timely manner, having a fixed nozzle size that prevents adjustment of the marking width, and having methods to adjust the width by raising or replacing the nozzle, which are easily affected by environmental factors such as wind force, wind direction, temperature, and humidity, leading to a decline in marking quality, and requiring repeated disassembly and installation, which can affect the efficiency of the marking.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a road marking device, comprising a vehicle platform, a tank, and a feeding pump, characterized in that an adjustment frame is provided on the left side of the vehicle platform, and two L-shaped threaded blocks are provided on the right side of the vehicle platform. Diverter pipes are installed on the sides of the two L-shaped threaded blocks that are far apart from each other. Multiple nozzles are respectively provided at the bottom of the two diverter pipes. A main pipe is installed at the discharge end of the feeding pump, and a hose is installed at the other end of the main pipe and the inlet of the two diverter pipes.

[0006] A movable sealing mechanism is provided on both L-shaped threaded blocks, which is used to control the slurry to be sprayed out through several nozzles;

[0007] The vehicle is equipped with a lifting and discharging mechanism, which is used to remove residual slurry from the main pipe, two hoses and two branch pipes and to adjust the height of the adjusting frame.

[0008] The adjustment frame is equipped with an adjustment mechanism, which is used to adjust the distance between the two L-shaped threaded blocks.

[0009] Preferably, the movable sealing mechanism includes an adjusting motor installed on the side of one of the L-shaped threaded blocks. Each of the two L-shaped threaded blocks has a movable cavity. A threaded rod is rotatably mounted on the inner side wall of each of the two movable cavities. The other end of one of the threaded rods extends outside the L-shaped threaded block and is mounted on the output shaft of the adjusting motor. Threaded plates are threaded onto both threaded rods. Moving rods are mounted on the sides of the two threaded plates that are far apart from each other. Movable holes are opened at the ends of the two diverter pipes that are close to each other. One end of each of the two moving rods passes through the two movable holes and is fitted with a circular piston. The two threaded rods are installed in cooperation via a transmission unit.

[0010] Preferably, the transmission unit includes movable holes respectively opened at one end of the two threaded rods that are close to each other, a movable rod slidably installed on the two movable holes, and a clearance hole opened at one end of the two L-shaped threaded blocks that are close to each other. The movable rod passes through the two clearance holes in sequence, and a rectangular cavity is opened on the upper part of the two threaded rods. The two ends of the movable rod extend into the two rectangular cavities respectively and are fitted with rectangular blocks.

[0011] Preferably, the lifting and discharging mechanism includes a fixed frame and a fixed cylinder mounted on the top of the vehicle platform. An output motor is mounted on the top of the fixed frame, and a lifting groove is provided on the side of the fixed frame. A first lead screw is rotatably mounted on the inner wall of the top of the lifting groove. The top end of the first lead screw is mounted on the output shaft of the output motor. An L-shaped lifting block is threaded onto the first lead screw. An adjusting frame is mounted on the bottom of the L-shaped lifting block. A sliding hole is provided on the side of the fixed cylinder, and a sliding rod is slidably mounted on the sliding hole. One end of the sliding rod extends into the fixed cylinder and is fitted with a rectangular piston. An air inlet and a flow hole are respectively provided on the side of the main pipe and the side of the fixed cylinder. A connecting pipe is installed on both the flow hole and the air inlet. A valve is provided on the connecting pipe. A driven unit that moves the sliding rod is provided on the fixed cylinder.

[0012] Preferably, the driven unit includes an adjusting cylinder mounted on the top of the fixed cylinder. A second lead screw is rotatably mounted on the inner wall of the adjusting cylinder. An adjusting plate is threaded onto the second lead screw. A fixing rod is mounted on the side of the adjusting plate. The other end of the fixing rod passes through the adjusting cylinder and is connected to a connecting plate together with one end of the sliding rod. The second lead screw is installed in cooperation with the first lead screw through a transmission element.

[0013] Preferably, the transmission element includes a transmission cavity formed on the fixed frame, a first bevel gear is sleeved on the first lead screw, one end of the second lead screw extends into the transmission cavity and is fitted with a second bevel gear, and the first bevel gear meshes with the second bevel gear.

[0014] Preferably, the diameter of the first bevel gear is larger than the diameter of the second bevel gear.

[0015] Preferably, the adjustment mechanism includes a drive motor installed on the side of the adjustment frame, an adjustment groove is provided at the bottom of the adjustment frame, a bidirectional lead screw is installed on the inner wall of the adjustment groove, one end of the bidirectional lead screw extends to the outside of the adjustment frame and is installed on the output shaft of the drive motor, and the two L-shaped threaded blocks are threaded onto the bidirectional lead screw.

[0016] The beneficial effects of this utility model are as follows:

[0017] This invention utilizes an output motor, a first lead screw, and an L-shaped lifting block to retract the adjustment frame. Simultaneously, the retraction causes the second lead screw to rotate. This rotation, through an adjustment plate, a fixed rod, a connecting plate, a fixed cylinder, a sliding rod, a rectangular piston, and a connecting pipe, applies pressure to the main pipeline. This pressure forces the slurry through two hoses and two branch pipes, spraying it from the nozzles. This process clears slurry from the main pipeline and branch pipes, preventing residual slurry from solidifying and clogging, thus ensuring continued use. Furthermore, the adjustment motor, threaded rod, circular piston, movable rod, and rectangular block control the number of hoses and nozzles connected at both ends, thereby adjusting the marking width. This allows for simultaneous adjustment of the marking width on both sides under various marking spacings, effectively preventing issues arising from lifting, disassembly, replacement, or repeated adjustments that could compromise marking quality and efficiency.

[0018] This invention uses the diameter ratio of the first bevel gear and the second bevel gear to make the moving distance of the L-shaped lifting block less than the distance of the rectangular piston, thereby ensuring sufficient pressure to discharge the slurry. The distance between the nozzles at both ends can be adjusted by the drive motor, the bidirectional lead screw, the L-shaped threaded block and the diverter pipe, thereby adjusting the distance between the two marking positions. Attached Figure Description

[0019] Figure 1This is a three-dimensional structural diagram from a first-view perspective of the present invention;

[0020] Figure 2 This is a three-dimensional structural diagram from a second perspective in this utility model;

[0021] Figure 3 This is a three-dimensional structural schematic diagram of a partially cut section of the adjusting frame and the fixing cylinder in this utility model;

[0022] Figure 4 for Figure 3 An enlarged 3D structural diagram at point A in the middle;

[0023] Figure 5 This is a three-dimensional structural diagram of the adjusting frame, L-shaped threaded block, and diverter pipe partially cut out in this utility model;

[0024] Figure 6 This is a three-dimensional structural diagram of a partially enlarged section of the threaded rod in this utility model.

[0025] Reference numerals: 1. Car platform; 2. Feed pump; 3. Main pipe; 4. Output motor; 5. Fixing frame; 6. Adjusting frame; 7. L-shaped threaded block; 8. Diverter pipe; 9. Nozzle; 10. Fixing cylinder; 11. Drive motor; 12. Bidirectional lead screw; 13. Adjusting motor; 14. Threaded rod; 15. Threaded plate; 16. Moving rod; 17. Circular piston; 18. Movable rod; 19. Rectangular block; 20. Slide rod; 21. Rectangular piston; 22. Connecting pipe; 23. First lead screw; 24. L-shaped lifting block; 25. Adjusting cylinder; 26. Second lead screw; 27. Fixing rod; 28. First bevel gear; 29. ​​Second bevel gear. Detailed Implementation

[0026] The present invention will be further described below with reference to specific embodiments. However, those skilled in the art should understand that the detailed description given here with reference to the accompanying drawings is for better explanation. The structure of the present invention may exceed the limited embodiments described herein. Some equivalent alternatives or common means will not be described in detail here, but they still fall within the protection scope of this application.

[0027] Figures 1-5 This is the preferred embodiment of the present invention, which is described below in conjunction with the appendix. Figure 1 ~Attached Figure 5 The present invention will be further described below.

[0028] A road marking device includes a vehicle platform 1, a tank, and a feed pump 2. It should be noted that, in this embodiment, the installation method of the vehicle platform 1, the tank, and the feed pump 2 can refer to the technical content of a road marking construction device disclosed in Chinese Patent No. CN222730313U, which will not be elaborated here. Two L-shaped threaded blocks 7 are provided on the left side of the vehicle platform 1. Diverter pipes 8 are installed on the sides of the two L-shaped threaded blocks 7 that are far apart from each other. Multiple nozzles 9 are respectively provided at the bottom of the two diverter pipes 8. A main pipe 3 is installed at the discharge end of the feed pump 2. The other end of the main pipe 3 and the feed inlet of the two diverter pipes 8 are respectively connected to a hose.

[0029] A movable sealing mechanism is provided on both L-shaped threaded blocks 7;

[0030] A lifting and unloading mechanism is installed on the car body 1;

[0031] An adjustment mechanism is provided on the adjustment frame 6.

[0032] With the above structure, during use, the adjustment mechanism can move the two L-shaped threaded blocks 7 closer or further apart. The movement of the two L-shaped threaded blocks 7 changes the distance between the nozzles 9 at both ends via the two diverter pipes 8, thereby adjusting the distance between the two marking positions. Then, the movable sealing mechanism can simultaneously control the number of hoses at both ends and the number of nozzles 9 connected, thus adjusting the marking width. Therefore, the marking width on both sides can be adjusted synchronously under various marking spacings, effectively avoiding the need for lifting, disassembly, or repeated adjustments. Adjustments affect the quality and efficiency of the road markings. At the same time, when the number of connected hoses and nozzles 9 changes, the output of the feed pump 2 also changes, thereby stabilizing the feed to the nozzles 9. The nozzles 9 can be stored by the lifting and discharging mechanism to avoid affecting their movement. At the same time, pressure can be applied to the main pipe 3. The pressure in the main pipe 3 will cause the slurry to pass through the two hoses and two branch pipes 8 in sequence and be sprayed out from the nozzles 9, thereby clearing the slurry in the main pipe 3 and branch pipes 8, thus preventing residual slurry from solidifying and clogging, which would affect subsequent use.

[0033] like Figure 3 and Figure 4As shown, the movable sealing mechanism includes an adjusting motor 13 installed on the side of one of the L-shaped threaded blocks 7. Both L-shaped threaded blocks 7 have movable cavities. Threaded rods 14 are rotatably installed on the inner side walls of both movable cavities. The other end of one of the threaded rods 14 extends outside the L-shaped threaded block 7 and is installed on the output shaft of the adjusting motor 13. Threaded plates 15 are threadedly installed on both threaded rods 14. Moving rods 16 are installed on the sides of the two threaded plates 15 that are far apart from each other. Movable holes are opened at the ends of the two diverter pipes 8 that are close to each other. One end of each of the two moving rods 16 passes through the two movable holes and is fitted with a circular piston 17. The two threaded rods 14 are installed in cooperation through a transmission unit. Specifically, the threads of the two threaded rods 14 are arranged in opposite directions.

[0034] In this scheme, adjusting the single unit 13 can drive one of the threaded rods 14 to rotate. One of the threaded rods 14 causes the other threaded rod 14 to move through the transmission unit. The rotation of the two threaded rods 14, limited by the inner wall of the movable cavity, will cause the two threaded plates 15 to move. The movement of the two threaded plates 15 will drive the two moving rods 16 to move. The movement of the two moving rods 16 will drive the circular pistons 17. The movement of the two circular pistons 17 will control the number of connections between the hose and several nozzles 9, thereby adjusting the width of the marking.

[0035] like Figure 5 As shown, the transmission unit includes movable holes respectively opened at one end of two threaded rods 14 that are close to each other. Movable rods 18 are slidably installed on the two movable holes. Both ends of two L-shaped threaded blocks 7 that are close to each other are provided with clearance holes. Movable rods 18 pass through the two clearance holes in sequence. Both threads 14 are provided with rectangular cavities. Both ends of movable rods 18 extend into the two rectangular cavities and are provided with rectangular blocks 19.

[0036] In this design, when the two threaded rods 14 move, the two rectangular blocks 19 slide within the two rectangular cavities. When one of the threaded rods 14 rotates, it causes one of the rectangular blocks 19 to rotate through one of the rectangular cavities. The rotation of one rectangular block 19 causes the movable rod 18 to rotate, which in turn causes the other rectangular block 19 to rotate. The rotation of the other rectangular block 19, in turn, causes the other threaded rod 14 to rotate through the other rectangular cavity. This allows the width of the markings at both ends to be adjusted simultaneously. Thus, the width of the markings on both sides can be adjusted synchronously under various marking spacings, effectively avoiding the impact on marking quality and efficiency caused by lifting, disassembly, replacement, or repeated adjustments.

[0037] like Figure 1 , Figure 3 and Figure 4As shown, the lifting and discharging mechanism includes a fixed frame 5 and a fixed cylinder 10 mounted on the top of the vehicle platform 1. An output motor 4 is mounted on the top of the fixed frame 5. A lifting groove is provided on the side of the fixed frame 5. A first lead screw 23 is rotatably mounted on the inner wall of the top of the lifting groove. The top of the first lead screw 23 is mounted on the output shaft of the output motor 4. An L-shaped lifting block 24 is threaded onto the first lead screw 23. An adjusting frame 6 is mounted on the bottom of the L-shaped lifting block 24. A sliding hole is provided on the side of the fixed cylinder 10. A sliding rod 20 is slidably mounted on the sliding hole. One end of the sliding rod 20 extends into the fixed cylinder 10 and is fitted with a rectangular piston 21. An air inlet and a flow hole are respectively provided on the side of the main pipe 3 and the side of the fixed cylinder 10. A connecting pipe 22 is installed on both the flow hole and the air inlet. A valve is provided on the top, and a driven unit is provided on the fixed cylinder 10 to move the slide rod 20. The driven unit includes an adjusting cylinder 25 installed on the top of the fixed cylinder 10. A second lead screw 26 is rotatably installed on the inner wall of the adjusting cylinder 25. An adjusting plate is threaded on the second lead screw 26. A fixed rod 27 is installed on the side of the adjusting plate. The other end of the fixed rod 27 passes through the adjusting cylinder 25 and is connected to a connecting plate together with one end of the slide rod 20. The second lead screw 26 is installed in cooperation with the first lead screw 23 through a transmission element. The transmission element includes a transmission cavity opened on the fixed frame 5. A first bevel gear 28 is sleeved on the first lead screw 23. One end of the second lead screw 26 extends into the transmission cavity and is installed with a second bevel gear 29. The first bevel gear 28 and the second bevel gear 29 mesh with each other.

[0038] In this design, the output motor 4 causes the first lead screw 23 to rotate. The rotation of the first lead screw 23 moves the L-shaped lifting block 24, which in turn moves the adjusting frame 6 up and down. The adjusting frame 6 then moves the bidirectional lead screw 12 up and down, which in turn moves the L-shaped threaded block 7 up and down. The L-shaped threaded block 7 then moves the diverter pipe 8 up and down, which in turn moves the nozzle 9 up and down. This ensures that the nozzle 9 maintains a fixed distance from the ground during use. When not in use, the diverter pipe 8 and nozzle 9 are stored to avoid affecting the movement of the vehicle platform 1. Simultaneously, the rotation of the first lead screw 23 drives the first bevel gear 28 to rotate, which in turn drives the second bevel gear 29 to rotate. The second bevel gear 29 then drives the second lead screw 26 to rotate, which in turn... The adjustment plate moves, which in turn moves the fixed rod 27, which in turn moves the connecting plate, which in turn moves the sliding rod 20, which in turn moves the rectangular piston 21. The rectangular piston 21 compresses the space inside the fixed cylinder 10 and generates pressure, which is then transmitted to the main pipe 3 through the connecting pipe 22. The pressure in the main pipe 3 forces the slurry through the two hoses and two branch pipes 8 and out of the nozzle 9, thereby clearing the slurry in the main pipe 3 and the branch pipes 8, thus preventing residual slurry from solidifying and clogging, which would affect subsequent use. The valve allows for easy sealing of the connecting pipe 22, preventing slurry from entering the fixed cylinder 10 through the connecting pipe 22 during marking, and cleaning while storing the nozzle 9, avoiding repeated adjustments and increasing the workload of the workers.

[0039] like Figure 4 As shown, the diameter of the first bevel gear 28 is larger than the diameter of the second bevel gear 29.

[0040] In this scheme, by setting the diameter ratio, the moving distance of the L-shaped lifting block 24 is less than the distance of the rectangular piston 21, thereby ensuring that the pressure is sufficient to discharge the slurry.

[0041] like Figure 3 As shown, the adjustment mechanism includes a drive motor 11 installed on the side of the adjustment frame 6. An adjustment groove is provided at the bottom of the adjustment frame 6. A bidirectional lead screw 12 is installed on the inner wall of the adjustment groove. One end of the bidirectional lead screw 12 extends to the outside of the adjustment frame 6 and is installed on the output shaft of the drive motor 11. Two L-shaped threaded blocks 7 are threaded onto the bidirectional lead screw 12.

[0042] In this scheme, the bidirectional lead screw 12 can be rotated by the drive motor 11. The rotation of the bidirectional lead screw 12, under the limit of the side wall of the adjustment groove, will cause the two L-shaped threaded blocks 7 to move away from or closer to each other. The two L-shaped threaded blocks 7 moving away from or closer to each other will cause the two diverter pipes 8 to move away from or closer to each other, thereby changing the distance between the nozzles 9 at both ends, thus adjusting the distance between the two marking positions.

[0043] In summary: When using this utility model, firstly, the vehicle board 1 is moved to the marked position, then the drive motor 11 is started. The output of the drive motor 11 will drive the bidirectional lead screw 12 to rotate. The rotation of the bidirectional lead screw 12, limited by the inner wall of the adjusting groove, will cause the two L-shaped threaded blocks 7 to move away from or towards each other. The two L-shaped threaded blocks 7 moving away from or towards each other will cause the two diverter pipes 8 to move away from or towards each other. The two diverter pipes 8 moving away from or towards each other will cause the nozzles 9 located on both sides to move. The movement of the nozzles 9 located on both sides will increase the distance between the two marked positions. The movement of the two L-shaped threaded blocks 7 adjusts the spacing between the two markings. Simultaneously, the movement of the two L-shaped threaded blocks 7 moves the two threaded rods 14. At this time, the two rectangular blocks 19 slide within the rectangular cavities of the two threaded rods 14. When the positions of the two branch pipes 8 are adjusted, the feed pump 2 is started. The output of the feed pump 2 transports the slurry from the tank to the main pipe 3, and then through two hoses to the two branch pipes 8. Due to the obstruction of the circular piston 17, the slurry is sprayed out from one of the nozzles 9, thus marking the lines. When the marking width needs to be changed, the adjusting motor 13 is started. The output of the adjusting motor 13 will drive one of the threaded rods 14 to rotate. The rotation of the threaded rod 14 will cause one of the rectangular blocks 19 to rotate through one of the rectangular cavities. The rotation of the rectangular block 19 will drive the movable rod 18 to rotate. The rotation of the movable rod 18 will cause another rectangular block 19 to rotate. The rotation of the other rectangular block 19 will cause another threaded rod 14 to rotate through another rectangular cavity. The rotation of the two threaded rods 14, limited by the inner wall of the movable cavity, will cause the two threaded plates 15 to move. The movement of the two threaded plates 15 will drive the two movable rods 16 to move. The movement of the two movable rods 16 will drive the two circular pistons 17 to move. When the two circular pistons 17 approach each other and are respectively located on the right or left side of the second nozzle 9 on both sides, the slurry of the diversion pipe 8 will be sprayed out from the two nozzles 9, thereby adjusting the marking width. Thus, the marking width on both sides can be adjusted synchronously under various marking spacings, effectively avoiding the impact on marking quality and efficiency due to lifting adjustment, disassembly and replacement, or repeated adjustment.

[0044] When in use, the output motor 4 is started, which drives the first lead screw 23 to rotate. The rotation of the first lead screw 23, limited by the inner wall of the lifting groove, causes the L-shaped lifting block 24 to move. The movement of the L-shaped lifting block 24 causes the adjusting frame 6 to move up and down. The up and down movement of the adjusting frame 6, via the bidirectional lead screw 12, causes the L-shaped threaded block 7 to move up and down. The up and down movement of the L-shaped threaded block 7 causes the diverter pipe 8 to move up and down. The up and down movement of the diverter pipe 8 causes the nozzle 9 to move up and down, thus maintaining a fixed distance between the nozzle 9 and the ground during use. When not in use, the diverter pipe 8 and nozzle 9 are stored to avoid affecting the movement of the vehicle platform 1. When the first lead screw 23 rotates clockwise, causing the adjusting frame 6 to move downwards, the rotation of the first lead screw 23 drives the first bevel gear 28 to rotate. The rotation of the first bevel gear 28 drives the second bevel gear 29 to rotate. The rotation of the second bevel gear 29 drives the second lead screw 26 to rotate. The rotation of the second lead screw 26 moves the adjusting plate away from the ground. The adjusting frame 6 and the adjusting plate move the fixing rod 27. The movement of the fixing rod 27 causes the connecting plate to move, which in turn causes the sliding rod 20 to move. The movement of the sliding rod 20 causes the rectangular piston 21 to move away from the adjusting frame 6. At this time, the valve does not block the connecting pipe 22. When the marking is completed, the output motor 4 causes the first lead screw 23 to rotate counterclockwise. The counterclockwise rotation of the first lead screw 23 causes the second lead screw 26 to rotate counterclockwise. The counterclockwise rotation of the second lead screw 26 causes the rectangular piston 21 to gradually approach the adjusting frame 6. At this time, the movement of the rectangular piston 21 compresses the space inside the fixing cylinder 10 and generates pressure. Then, the pressure is transmitted to the main pipe 3 through the connecting pipe 22. The pressure inside the main pipe 3 causes the slurry to pass through the two hoses and the two branch pipes 8 in sequence and spray out from the nozzle 9, thereby clearing the slurry in the main pipe 3 and the branch pipes 8, thus preventing the residual slurry from solidifying and clogging. The nozzle 9 is cleaned while being stored, avoiding repeated adjustments and increasing the labor intensity of the workers.

[0045] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A road marking line drawing device comprising a cart board (1), a tank body and a supply pump (2), characterized in that, An adjustment frame (6) is provided on the left side of the vehicle plate (1), and two L-shaped threaded blocks (7) are provided on the right side of the vehicle plate (1). Diverter pipes (8) are installed on the sides of the two L-shaped threaded blocks (7) that are far apart from each other. Multiple nozzles (9) are provided at the bottom of the two diverter pipes (8). A main pipe (3) is installed at the discharge end of the feed pump (2). A hose is installed at the other end of the main pipe (3) and the feed inlet of the two diverter pipes (8). The two L-shaped threaded blocks (7) are provided with a movable sealing mechanism, which is used to control the slurry to be sprayed out through several nozzles (9); The vehicle platform (1) is equipped with a lifting and discharging mechanism, which is used to remove residual slurry from the main pipe (3), two hoses and two branch pipes (8) and adjust the height of the adjusting frame (6); The adjusting frame (6) is provided with an adjusting mechanism, which is used to adjust the spacing between the two L-shaped threaded blocks (7).

2. The road marking device according to claim 1, wherein The movable sealing mechanism includes an adjusting motor (13) installed on the side of one of the L-shaped threaded blocks (7). Both L-shaped threaded blocks (7) have movable cavities. The inner walls of the side of both movable cavities are rotatably fitted with threaded rods (14). The other end of one of the threaded rods (14) extends to the outside of the L-shaped threaded block (7) and is installed on the output shaft of the adjusting motor (13). Both threaded rods (14) are threadedly fitted with threaded plates (15). The sides of the two threaded plates (15) that are far apart from each other are fitted with moving rods (16). The ends of the two diverter pipes (8) that are close to each other are provided with movable holes. One end of each of the two moving rods (16) passes through the two movable holes and is fitted with a circular piston (17). The two threaded rods (14) are installed in cooperation through a transmission unit.

3. The road marking device of claim 2, wherein The transmission unit includes movable holes respectively opened at one end of the two threaded rods (14) close to each other, and movable rods (18) are slidably installed on the two movable holes. Both ends of the two L-shaped threaded blocks (7) close to each other are provided with clearance holes. The movable rods (18) pass through the two clearance holes in sequence. Both threaded rods (14) are provided with rectangular cavities. Both ends of the movable rods (18) extend into the two rectangular cavities and are provided with rectangular blocks (19).

4. The road marking device of claim 1, wherein, The lifting and unloading mechanism includes a fixed frame (5) and a fixed cylinder (10) installed on the top of the vehicle plate (1). An output motor (4) is installed on the top of the fixed frame (5). A lifting groove is provided on the side of the fixed frame (5). A first lead screw (23) is rotatably installed on the inner wall of the top of the lifting groove. The top of the first lead screw (23) is installed on the output shaft of the output motor (4). An L-shaped lifting block (24) is threaded on the first lead screw (23). An adjusting frame (6) is installed on the L-shaped lifting block (24). At the bottom, a sliding hole is provided on the side of the fixed cylinder (10), and a sliding rod (20) is slidably installed on the sliding hole. One end of the sliding rod (20) extends into the fixed cylinder (10) and is fitted with a rectangular piston (21). A gas filling port and a flow hole are respectively provided on the side of the main pipe (3) and the side of the fixed cylinder (10). A connecting pipe (22) is installed on both the flow hole and the gas filling port. A valve is provided on the connecting pipe (22). A driven unit is provided on the fixed cylinder (10) to move the sliding rod (20).

5. The road marking device of claim 4, wherein, The driven unit includes an adjusting cylinder (25) installed on the top of the fixed cylinder (10). A second lead screw (26) is rotatably installed on the inner wall of the adjusting cylinder (25). An adjusting plate is threaded on the second lead screw (26). A fixing rod (27) is installed on the side of the adjusting plate. The other end of the fixing rod (27) passes through the adjusting cylinder (25) and is connected to a connecting plate together with one end of the slide rod (20). The second lead screw (26) is installed in cooperation with the first lead screw (23) through a transmission element.

6. The road marking device of claim 5, wherein, The transmission element includes a transmission cavity opened on the fixed frame (5), a first bevel gear (28) is sleeved on the first lead screw (23), and one end of the second lead screw (26) extends into the transmission cavity and is equipped with a second bevel gear (29). The first bevel gear (28) meshes with the second bevel gear (29).

7. The road marking device of claim 6, wherein the marking material is a thermoplastic material. The diameter of the first bevel gear (28) is greater than the diameter of the second bevel gear (29).

8. The road marking device of claim 6, wherein, The adjustment mechanism includes a drive motor (11) installed on the side of the adjustment frame (6). The bottom of the adjustment frame (6) is provided with an adjustment groove. A bidirectional lead screw (12) is installed on the inner wall of the adjustment groove. One end of the bidirectional lead screw (12) extends to the outside of the adjustment frame (6) and is installed on the output shaft of the drive motor (11). The two L-shaped threaded blocks (7) are threaded onto the bidirectional lead screw (12).

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