Road pavement marking device

Abstract

The invention relates to the technical field of road construction, in particular to a road surface marking device which comprises a walking vehicle, a storage tank, a sweeping mechanism, a dust collection mechanism and a stirring mechanism, and a mounting plate is arranged on the walking vehicle. The sweeping mechanism is located at the front end of the walking vehicle, garbage, sundries and dust on a road surface can be effectively swept away, the clean road surface is provided for follow-up marking work, and smooth work of the marking mechanism is ensured through cleaning in the early stage of sweeping work; dust and fine particles on the road surface can be effectively sucked away in the sweeping process, dust flying is avoided, and therefore the air quality of the working environment is improved, meanwhile, the cleanliness of the swept road surface is improved, and it is guaranteed that the marking effect is not affected by dust; the road surface can be ensured to be flat and clean, so that the marking quality is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of road construction, and particularly to a road pavement marking device. Background Art

[0002] Road construction refers to an engineering entity that takes roads as the object and then constructs, maintains, and manages the road surface. When constructing roads, it is necessary to mark the road surface. Road markings are mainly drawn on the road surface. By using a marking device to draw lines, the road can be divided to guide pedestrians.

[0003] A municipal road traffic marking device and its marking method with the publication number of CN109208451B. One side of the upper part of the vehicle frame is provided with a power device. The power device is in 2 groups and is symmetrically arranged. One side of the driving wheel is provided with a driving device, and the driven part of the driving device is an intermittent motion mechanism; one side of the lower part of the driving device is provided with 2 - 3 groups of evenly arranged marking devices. One side of the upper part of the power device is provided with a storage tank. The lower part of the storage tank is fixedly installed on the power device through a plurality of support columns. The marking brush directly paints the road surface, and multiple groups of marking brushes are provided to mark the road surface multiple times. The cleaning device can clean the garbage to avoid the influence of garbage such as road dust on the marking effect during marking. Although the above - mentioned existing cleaning devices can clean the garbage and enhance the multiple - marking effect of the marking brush on the road surface, there are still some sundries that are not cleaned during the cleaning of the cleaning device, and there is a large amount of dust, which affects the working environment and the marking effect. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems in the prior art that there are still some sundries that are not cleaned during the cleaning of the cleaning device, and there is a large amount of dust, which affects the working environment and the marking effect. A road pavement marking device is provided. After cleaning and dust suction are completed, it can ensure that the road surface is flat and clean, thereby ensuring the quality of the marking work without the interference of sundries and dust.

[0005] To achieve the above purpose, a road pavement marking device proposed by the present invention includes a walking vehicle, a storage tank, a cleaning mechanism, a dust suction mechanism, and a stirring mechanism. An installation plate is arranged on the walking vehicle. The storage tank is arranged on the installation plate. A marking mechanism is arranged below the storage tank; the cleaning mechanism is connected to the front end of the walking vehicle; the dust suction mechanism is connected to the rear side of the cleaning mechanism; the stirring mechanism is arranged on the storage tank.

[0006] As a further description of the above - mentioned technical solution: The cleaning mechanism includes an adjustment frame. A plurality of driving gears are arranged inside the adjustment frame. The plurality of driving gears are connected by a driving belt. Each driving gear is connected to a rotating disk. A cleaning brush is arranged on the rotating disk. The upper part of the driving gear is connected to a driving motor.

[0007] As a further description of the above technical solution: The dust suction mechanism includes a dust suction pump. A dust suction pipe is connected below the dust suction pump. A plurality of dust suction heads are connected below the dust suction pipe. A dust collection box is connected to one side of the dust suction pump.

[0008] As a further description of the above technical solution: The scribing mechanism includes a pump box. The pump box is connected to a storage tank through a hose. The pump box is connected to a discharge nozzle through a material guide pipe. The discharge nozzle is connected to an adjustment component.

[0009] As a further description of the above technical solution: The adjustment component includes a mounting frame. A lead screw is connected inside the mounting frame. A driving block is arranged on the lead screw. The driving block is detachably connected to the discharge nozzle. One end of the lead screw is connected to an adjustment motor.

[0010] As a further description of the above technical solution: The stirring mechanism includes a driving box. A first gear and a second gear are arranged inside the driving box. Both the first gear and the second gear are meshed with a driving gear. The driving gear is connected to a stirring motor. The first gear is connected to a first stirring component. The second gear is connected to a second stirring component.

[0011] As a further description of the above technical solution: The first stirring component includes a driving cylinder. The driving cylinder is connected to the first gear above. A stirring frame is connected below the driving cylinder. A plurality of first stirring plates are arranged inside the stirring frame. A scraping plate is connected to the outside of the stirring frame. The second stirring component includes a driving shaft. The driving shaft is connected to the second gear. A plurality of second stirring plates are arranged on the driving shaft.

[0012] As a further description of the above technical solution: A control box is arranged on the walking vehicle. A camera is arranged on the front side of the control box. A PLC and an Internet of Things module are integrated inside the control box.

[0013] As a further description of the above technical solution: The storage tank includes an outer tank body and an inner tank body. A serpentine heating pipe is arranged between the outer tank body and the inner tank body. An air inlet pipe is arranged at one end of the serpentine heating pipe. An air outlet pipe is arranged at the other end of the serpentine heating pipe. The air inlet pipe is connected to a heating box.

[0014] As a further description of the above technical solution: The air outlet pipe is connected to a drying pipe through a connecting pipe. The drying pipe is arranged at the rear side of the scribing mechanism. A plurality of air jet heads are arranged below the drying pipe.

[0015] The above technical solution has the following advantages or beneficial effects:

[0016] 1. In the present invention, the cleaning mechanism is located at the front end of the walking vehicle, which can effectively clean the garbage, sundries and dust on the road surface, providing a clean road surface for the subsequent line marking work. The cleaning in the early stage of the cleaning work ensures the smooth operation of the line marking mechanism. The dust suction mechanism is connected to the rear side of the cleaning mechanism, which can effectively suck away the dust and fine particles on the road surface during the cleaning process, avoiding the dust flying, thus improving the air quality of the working environment. At the same time, it also improves the cleanliness of the road surface after cleaning, ensuring that the line marking effect is not affected by dust. The line marking mechanism under the storage tank can ensure the road surface is flat and clean after cleaning and suction, thus ensuring the quality of the line marking work. Without the interference of sundries and dust, the line marking process is more stable and the lines are clearer and neater. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of a line marking device in an embodiment of the present invention;

[0018] Figure 2 is Figure 1 a schematic structural diagram of the line marking mechanism in;

[0019] Figure 3 is Figure 1 a sectional view of the cleaning mechanism in;

[0020] Figure 4 is Figure 2 a schematic structural diagram of the adjustment component in;

[0021] Figure 5 is Figure 1 a schematic structural diagram of the stirring mechanism in;

[0022] Figure 6 is Figure 1 a schematic structural diagram of the serpentine heating tube in.

[0023] LEGEND DESCRIPTION:

[0024] 1. Walking vehicle; 2. Mounting plate; 3. Storage tank; 4. Marking mechanism; 5. Cleaning mechanism; 6. Dust suction mechanism; 7. Stirring mechanism; 8. Control box; 9. Camera; 10. Serpentine heating tube; 11. Air inlet pipe; 12. Air outlet pipe; 13. Heating box; 14. Connecting pipe; 15. Drying pipe; 16. Jet head; 31. Outer tank body; 32. Inner tank body; 41. Pump box; 42. Feeding pipe; 43. Discharge spray head; 44. Adjustment assembly; 441. Adjustment frame; 442. Lead screw; 443. Driving block; 444. Adjustment motor; 51. Mounting frame; 52. Driving gear; 53. Driving belt; 54. Rotating disc; 55. Cleaning brush; 56. Driving motor; 61. Dust suction pump; 62. Dust suction pipe; 63. Dust suction head; 64. Dust collection box; 71. Driving box; 72. First gear; 73. Second gear; 74. Driving gear; 75. Stirring motor; 76. First stirring and homogenizing assembly; 77. Second stirring and homogenizing assembly; 761. Driving cylinder; 762. Homogenizing frame; 763. First stirring plate; 764. Scraper; 771. Driving shaft; 772. Second stirring plate. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0027] In the description of the present invention, it should also be noted that unless otherwise clearly defined and limited, the terms "set", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Please refer to Figure 1-6, the present invention provides a technical solution: A road pavement marking device of the present invention includes a walking vehicle 1, a storage tank 3, a cleaning mechanism 5, a dust suction mechanism 6, and a stirring mechanism 7. An installation plate 2 is provided on the walking vehicle 1, the storage tank 3 is arranged on the installation plate 2, and a marking mechanism 4 is arranged below the storage tank 3; the cleaning mechanism 5 is connected to the front end of the walking vehicle 1; the dust suction mechanism 6 is connected to the rear side of the cleaning mechanism 5; the stirring mechanism 7 is arranged on the storage tank 3.

[0029] In the technical solution of the present invention, since the cleaning mechanism 5 is located at the front end of the walking vehicle 1, it can effectively clean the garbage, sundries, and dust on the road surface, providing a clean road surface for the subsequent marking work. The cleaning in the early stage of the cleaning work ensures the smooth operation of the marking mechanism 4, reducing quality problems caused by sundries during marking. The dust suction mechanism 6 is connected to the rear side of the cleaning mechanism 5, and can effectively suck away the dust and fine particles on the road surface during the cleaning process, avoiding dust flying, thereby improving the air quality of the working environment. At the same time, it also improves the cleanliness of the road surface after cleaning, ensuring that the marking effect is not affected by dust. The marking mechanism 4 below the storage tank 3 can ensure that the road surface is flat and clean after cleaning and dust suction, thus guaranteeing the quality of the marking work. Without the interference of sundries and dust, the marking process is more stable, and the lines are clearer and neater. By organically combining the work links such as cleaning, dust suction, and marking, the need for manual intervention is reduced, and the work efficiency is improved. At the same time, the setting of the dust suction mechanism 6 avoids the staff from contacting a large amount of dust, which helps to improve the operation safety and protect the health of the operators.

[0030] Among them, the walking vehicle 1 is the moving platform of the device, supporting the movement and operation of the entire equipment. It is connected to other components through the installation plate 2, providing support for the storage tank 3, the cleaning mechanism 5, the dust suction mechanism 6, etc. The control box 8 on the walking vehicle 1 contains a PLC and an Internet of Things module, facilitating remote control and monitoring by the operator, ensuring the high efficiency and intelligence of the device operation.

[0031] As Figure 2 and Figure 3 shown, the cleaning mechanism 5 includes an installation frame 51. A plurality of driving gears 52 are arranged inside the installation frame 51. The plurality of driving gears 52 are connected by a driving belt 53. Each driving gear 52 is connected to a rotating disk 54. A cleaning brush 55 is arranged on the rotating disk 54. The driving gear 52 is connected to a driving motor 56 above; the cleaning mechanism 5 is located at the front end of the device, composed of a plurality of driving gears 52 and cleaning brushes 55. The driving motor 56 provides power to clean the road surface with high efficiency, minimizing the residue of sundries and dust, enabling the cleaning and marking processes to be seamlessly connected, and ensuring a more accurate marking effect.

[0032] As Figure 1 and Figure 2As shown, the dust suction mechanism 6 includes a dust suction pump 61. A dust suction pipe 62 is connected below the dust suction pump 61, and a plurality of dust suction heads 63 are connected below the dust suction pipe 62. A dust collection box 64 is connected to one side of the dust suction pump 61. Since the dust suction mechanism 6 is located behind the cleaning mechanism 5, the dust suction pump 61 and the plurality of dust suction heads 63 are used to suck dust and debris. The arrangement of the dust suction pipe 62 and the dust collection box 64 can effectively collect and store the dust and debris generated during road cleaning, keep the working environment clean, ensure that the marked area is not disturbed by dust, and improve the operation effect.

[0033] As Figure 1 and Figure 2 shown, the line marking mechanism 4 includes a pump box 41. The pump box 41 is connected to the storage tank 3 through a hose, the pump box 41 is connected to a discharge nozzle 43 through a material guiding pipe 42, and the discharge nozzle 43 is connected to an adjustment assembly 44. The raw materials in the storage tank 3 can be pumped into the material guiding pipe 42 through the pump box 41, and line marking can be carried out through the discharge nozzle 43.

[0034] Among them, the adjustment assembly 44 includes an adjustment frame 441. A lead screw 442 is connected inside the adjustment frame 441. A driving block 443 is arranged on the lead screw 442. The driving block 443 is detachably connected to the discharge nozzle 43. One end of the lead screw 442 is connected to an adjustment motor 444. By the operation of the adjustment motor 444, the lead screw 442 can be driven to rotate, and then the driving block 443 and the discharge nozzle 43 can be driven to move, so as to adjust the position of the discharge nozzle 43, ensure the uniformity and accuracy of line marking, and improve the line marking quality.

[0035] As Figure 5 and Figure 6As shown in the figure, the stirring mechanism 7 includes a drive box 71. Inside the drive box 71, a first gear 72 and a second gear 73 are provided. Both the first gear 72 and the second gear 73 are engaged with a driving gear 74. The driving gear 74 is connected to a stirring motor 75. The first gear 72 is connected to a first stirring component 76, and the second gear 73 is connected to a second stirring component 77. The first stirring component 76 includes a driving cylinder 761. The upper part of the driving cylinder 761 is connected to the first gear 72. The lower part of the driving cylinder 761 is connected to a stirring frame 762. Inside the stirring frame 762, a plurality of first stirring plates 763 are provided. The outer side of the stirring frame 762 is connected to a scraping plate 764. The second stirring component 77 includes a driving shaft 771. The driving shaft 771 is connected to the second gear 73. A plurality of second stirring plates 772 are provided on the driving shaft 771. By controlling the operation of the drive box 71, the driving gear 74 can be driven to rotate. When the driving gear 74 rotates clockwise, the first gear 72 connected below it can be driven to rotate clockwise. Through the first gear 72, the first stirring component 76 can be driven to perform forward stirring. When the driving gear 74 rotates clockwise, the second gear 73 connected above it can be driven to rotate counterclockwise. Through the second gear 73, the second stirring component 77 can be driven to perform reverse stirring. In this way, through one drive box 71, the first stirring component 76 and the second stirring component 77 can be driven to perform stirring and mixing in different directions, enhancing the mixing effect. At the same time, the inner wall of the tank body can be scraped and cleaned by the scraping plate 764, preventing raw materials from sticking to the inner wall of the tank body and further enhancing the stirring and mixing effect.

[0036] Among them, the driving cylinder 761 is a hollow cylinder. The driving cylinder 761 is sleeved outside the driving shaft 771. By sleeving the driving cylinder 761 outside the driving shaft 771, the driving cylinder 761 and the driving shaft 771 can perform coaxial stirring, enhancing the stirring effect while reducing the installation space.

[0037] As Figure 1As shown in the figure, a control box 8 is provided on the walking vehicle 1. A camera 9 is provided on the front side of the control box 8. The control box 8 integrates a PLC and an Internet of Things module. The camera 9 is installed on the front side of the control box and can monitor the road surface and the operation of the equipment in real time, and feed back the image information to the operator. This helps the operator to more clearly understand the actual situation of the operation site, discover problems in time and make adjustments. The integration of the Internet of Things module enables the operator to remotely monitor and control the equipment through the network. Even when not on site, the operator can view the real-time data and the status of the equipment through a mobile device or a computer, realizing remote diagnosis and debugging. The control box 8 integrates a PLC (programmable logic controller), providing an automated control system. The PLC can precisely control various actions of the equipment, such as the processes of sweeping, dust suction, and line marking, ensuring that the equipment operates automatically according to the predetermined program and reducing human operation errors. The PLC and the Internet of Things module integrated in the control box can collect various data during the operation of the equipment in real time, such as working hours, working status, fault records, temperature, pressure, etc. These data can help the enterprise conduct statistical analysis in the later stage, optimize the use of the equipment, formulate a more scientific maintenance plan, and improve the service life of the equipment.

[0038] As Figure 1 and Figure 6 shown in the figure, the storage tank 3 includes an outer tank body 31 and an inner tank body 32. A serpentine heating pipe 10 is provided between the outer tank body 31 and the inner tank body 32. An air inlet pipe 11 is provided at one end of the serpentine heating pipe 10, and an air outlet pipe 12 is provided at the other end of the serpentine heating pipe 10. The air inlet pipe 11 is connected to the heating box 13. The hot air inside the serpentine heating pipe 10 can heat the raw materials inside the inner tank body 32 to avoid the condensation of the raw materials. Through the design of the serpentine heating pipe 10, the hot air can fully flow inside the heating pipe, thereby improving the heat exchange efficiency, helping to ensure the uniform distribution of temperature during the heating process, and avoiding the situation of local overheating or uneven heating. The structure of the serpentine heating pipe 10 can be arranged more compactly between the outer tank body 31 and the inner tank body 32, thereby saving space and at the same time increasing the heating surface area. This enables the heat energy to be more effectively transferred to the materials in the storage tank, improving the heating effect.

[0039] Among them, the air outlet pipe 12 is connected to the drying pipe 15 through a connecting pipe 14. The drying pipe 15 is arranged behind the line marking mechanism 4. A plurality of air nozzles 16 are provided below the drying pipe 15. The hot air flowing out of the serpentine heating pipe 10 enters the drying pipe 15, and the material line sprayed by the line marking mechanism 4 can be dried through the plurality of air nozzles 16, improving the line marking effect and saving energy at the same time.

[0040] Specifically, the storage tank 3 serves as a storage device for materials, ensuring an adequate supply of materials. The serpentine heating pipe 10 between the inner and outer tanks heats the stored materials through a heating system, ensuring that the materials maintain optimal fluidity under different environmental conditions. The intake pipe 11, outlet pipe 12, connecting pipe 14, drying pipe 15, and jet head 16 of the heating system constitute a complete heating and drying system, which can dry the materials when needed, improve the scribing effect, and avoid uneven scribing caused by moisture.

[0041] Working principle: The cleaning mechanism 5 is located at the front end of the walking vehicle 1, which can effectively clean the garbage, debris, and dust on the road surface, providing a clean road surface for the subsequent scribing work. The cleaning in the early stage of the cleaning work ensures the smooth operation of the scribing mechanism 4 and reduces the quality problems caused by the influence of debris during scribing. The dust suction mechanism 6 is connected to the rear side of the cleaning mechanism 5 and can effectively suck away the dust and fine particles on the road surface during the cleaning process, avoiding dust flying, thus improving the air quality of the working environment. At the same time, it also improves the cleanliness of the road surface after cleaning, ensuring that the scribing effect is not affected by dust. The scribing mechanism 4 under the storage tank 3 can ensure a flat and clean road surface after cleaning and dust suction, thus guaranteeing the quality of the scribing work. Without the interference of debris and dust, the scribing process is more stable, and the lines are clearer and neater. By organically combining the cleaning, dust suction, scribing and other working links, the need for manual intervention is reduced, and the work efficiency is improved. At the same time, the setting of the dust suction mechanism 6 avoids the staff from contacting a large amount of dust, which helps to improve the operation safety and protect the health of the operators.

[0042] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0043] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the art can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A road surface marking device, characterized in that: include: A traveling vehicle (1), wherein a mounting plate (2) is provided on the traveling vehicle (1); A material storage tank (3), wherein the material storage tank (3) is arranged on the mounting plate (2), and a marking mechanism (4) is arranged below the material storage tank (3); A cleaning mechanism (5), the cleaning mechanism (5) being connected to the front end of the traveling vehicle (1); A dust suction mechanism (6), the dust suction mechanism (6) being connected to the rear side of the cleaning mechanism (5); A stirring mechanism (7), wherein the stirring mechanism (7) is arranged on the material storage tank (3).

2. A road surface marking device according to claim 1, characterized in that: The cleaning mechanism (5) comprises a mounting frame (51), a plurality of driving gears (52) are arranged inside the mounting frame (51), the plurality of driving gears (52) are connected via a driving belt (53), each of the driving gears (52) is connected to a rotating disk (54), a cleaning brush (55) is arranged on the rotating disk (54), and the driving gear (52) is connected to a driving motor (56) above.

3. A road surface marking device according to claim 1, characterized in that: The dust suction mechanism (6) comprises a dust suction pump (61), a dust suction pipe (62) is connected below the dust suction pump (61), a plurality of dust suction heads (63) are connected below the dust suction pipe (62), and a dust collection box (64) is connected to one side of the dust suction pump (61).

4. A road surface marking device according to claim 1, characterized in that: The marking mechanism (4) comprises a pump box (41), the pump box (41) is connected to the material storage tank (3) through a hose, the pump box (41) is connected to a material discharge nozzle (43) through a material guide pipe (42), and the material discharge nozzle (43) is connected to an adjustment component (44).

5. A road surface marking device according to claim 4, characterized in that: The adjustment component (44) comprises an adjustment frame (441), the adjustment frame (441) is internally connected with a screw rod (442), a driving block (443) is arranged on the screw rod (442), the driving block (443) is detachably connected to the discharge nozzle (43), and one end of the screw rod (442) is connected to the adjustment motor (444).

6. A road surface marking device according to claim 1, characterized in that: The stirring mechanism (7) comprises a driving box (71), wherein a first gear (72) and a second gear (73) are arranged inside the driving box (71), wherein the first gear (72) and the second gear (73) are both meshed with a driving gear (74), wherein the driving gear (74) is connected to a stirring motor (75), wherein the first gear (72) is connected to a first stirring component (76), and wherein the second gear (73) is connected to a second stirring component (77).

7. A road surface marking device according to claim 6, characterized in that: The first stirring component (76) comprises a driving cylinder (761), the upper part of the driving cylinder (761) is connected to the first gear (72), the lower part of the driving cylinder (761) is connected to a stirring frame (762), a plurality of first stirring plates (763) are arranged inside the stirring frame (762), and the outer side of the stirring frame (762) is connected to a scraper (764); The second stirring component (77) comprises a driving shaft (771), wherein the driving shaft (771) is connected to the second gear (73), and a plurality of second stirring plates (772) are arranged on the driving shaft (771).

8. A road surface marking device according to claim 1, characterized in that: The traveling vehicle (1) is provided with a control box (8), a camera (9) is provided on the front side of the control box (8), and a PLC and an Internet of Things module are integrated in the control box (8).

9. A road surface marking device according to claim 1, characterized in that: The material storage tank (3) comprises an outer tank body (31) and an inner tank body (32), a serpentine heating pipe (10) is arranged between the outer tank body (31) and the inner tank body (32), an air inlet pipe (11) is arranged at one end of the serpentine heating pipe (10), and an air outlet pipe (12) is arranged at the other end of the serpentine heating pipe (10), and the air inlet pipe (11) is connected to a heating box (13).

10. A road surface marking device according to claim 9, characterized in that: The air outlet pipe (12) is connected to a drying pipe (15) through a connecting pipe (14); the drying pipe (15) is arranged at the rear side of the marking mechanism (4); and a plurality of nozzles (16) are arranged below the drying pipe (15).

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