Heat dissipation structure of hot melt coating marking bucket for road marking construction

Abstract

The utility model relates to road marking construction technical field, concretely provides a heat -curing coating scribing bucket's heat dissipation structure for road marking construction, include: the hot plate, the heat dissipation board, the heat dissipation fan, wherein, the hot plate sets up on the scribing bucket outside wall, a plurality of heat dissipation boards even array on the hot plate, and the heat dissipation board along the length direction even has a plurality of ventilation openings, a plurality of heat dissipation fans are arrayed to one side of a plurality of heat dissipation boards along the heat dissipation board length direction, and the heat of scribing bucket surface is evenly conducted to each heat dissipation board through the hot plate, the heat dissipation board passes through the contact area of increasing with air, and the ventilation opening makes the air circulation more smooth, and cooperates the heat dissipation fan of arrayed arrangement, can accelerate the air convection around the heat dissipation board, effectively alleviates the scribing bucket body deformation and component ageing acceleration problem caused by high temperature, prolongs the service life of scribing bucket and guarantees the construction accuracy.

Description

Technical Field

[0001] This utility model relates to the field of road marking technology, specifically providing a heat dissipation structure for a hot melt paint marking bucket used in road marking construction. Background Technology

[0002] In recent years, with the rapid advancement of my country's transportation infrastructure construction, the total road mileage has continued to grow. By the end of 2024, the total length of highways nationwide had exceeded 5.5 million kilometers, of which expressways exceeded 180,000 kilometers. Road markings, as core facilities for regulating traffic order and ensuring driving safety, directly affect road traffic efficiency and safety due to their construction quality and service life. In road marking construction, hot-melt paint has become the mainstream marking material, accounting for over 80% of the national road marking construction material market, due to its advantages such as a drying speed (typically 3-5 minutes before traffic can resume), strong wear resistance, a service life of 2-3 years, and good anti-aging properties that can withstand temperature changes from -30℃ to 60℃.

[0003] Hot melt paint marking machines are the most common road marking devices currently available. They are the core equipment for achieving automated road marking construction, and the marking bucket is the key component that directly participates in the paint forming process. The marking bucket mainly consists of a bucket body, an adjusting device, a scraper, and a feed inlet. The hopper is typically made of Q235 carbon structural steel and is hollow inside to hold molten hot-melt paint. A discharge port is located at the bottom of the hopper, and with an adjustment device, the width (usually 10-40cm) and thickness (usually 1.5-2.5mm) of the marking line can be precisely controlled. The scraper, made of wear-resistant alloy steel, is installed at the bottom of the discharge port and is pressed against the ground by a spring-loaded mechanism to ensure the paint is spread evenly and the edges are clear, resulting in a standardized marking line. The inlet is located at the top of the hopper and connects to the paint delivery pipeline of the hot-melt paint marking machine, ensuring a continuous supply of paint. The hopper holds the molten hot-melt paint, and the adjustment device allows for precise adjustment of the marking line width and thickness according to construction needs. The scraper ensures the paint is spread evenly and the edges are clear, resulting in a standardized marking line. However, marking buckets are often made of Q235 carbon structural steel, with a thermal conductivity of 12×10⁻. 6 At temperatures of 80℃, the duct is exposed to high temperatures for extended periods during construction, which significantly increases the thermal expansion of the duct body, making it prone to deformation such as bending and bulging. The seals in the duct are typically made of nitrile rubber, which has a maximum long-term operating temperature of 80℃. At temperatures of 150-200℃, nitrile rubber will rapidly age, harden, and crack, losing its sealing performance and causing leakage of hot melt paint. This not only wastes materials but also pollutes the road surface, affecting the accuracy of the marking and the service life of the duct. Utility Model Content

[0004] This utility model provides a heat dissipation structure for a hot-melt paint marking bucket used in road marking construction, which solves the problems of bucket body deformation and accelerated component aging caused by high-temperature environment, and extends the service life of the marking bucket.

[0005] In a first aspect, this utility model provides a heat dissipation structure for a hot melt paint marking bucket for road marking construction, comprising: a heat-spreading plate, a heat dissipation plate, and a heat dissipation fan, wherein the heat-spreading plate is disposed on the outer wall of the marking bucket; a plurality of heat dissipation plates are evenly arrayed on the heat-spreading plate, and the heat dissipation plates are evenly provided with multiple ventilation openings along the length direction; a plurality of heat dissipation fans are arranged in an array along the length direction of the heat dissipation plates on one side of the plurality of heat dissipation plates.

[0006] Optionally, a deflector plate is provided on the top of the vent, on the side opposite to the cooling fan.

[0007] Optionally, it also includes a water-cooling component, which includes: a water-cooling pipe and a water circulation component. The water-cooling pipe is arranged inside the heat dissipation plate along the circumference of the heat dissipation plate, and the water inlet and outlet of the water-cooling pipe are both facing the feed inlet of the marking hopper. The water circulation component is installed on the marking hopper and is connected to the water inlet and outlet of the water-cooling pipe, respectively.

[0008] Optionally, the water circulation components include: a liquid storage tank, an inlet pipe, a return pipe, and a water pump. The liquid storage tank is located on one side wall of the marking hopper perpendicular to the heat exchange plate, and the liquid storage tank is equipped with a grouting port. The inlet pipe is located on the marking hopper and is connected to the inlet ends of multiple water-cooling pipes, with one end of the inlet pipe connected to the liquid storage tank. The return pipe is located on the side of the inlet pipe near the heat exchange plate and is connected to the outlet ends of multiple water-cooling pipes, with one end of the return pipe connected to the liquid storage tank. The water pump is located on the inlet pipe.

[0009] Optionally, the end of the inlet pipe extends into the storage tank near the bottom of the storage tank, and the end of the return pipe extends into the storage tank near the top of the storage tank.

[0010] Optionally, the heat spreader, heat sink, cooling fan, baffle plate, water cooling pipe, inlet pipe, return pipe, and water pump are symmetrically arranged on both sides of the marked bucket, and the two inlet pipes and the return pipe are connected to the liquid storage tank.

[0011] Optionally, the liquid storage tank is a double-layered tank with rock wool board installed between the two layers.

[0012] Optionally, the storage tank is equipped with coolant, which can be either silicone oil or high-temperature heat transfer oil.

[0013] The heat dissipation structure of the hot-melt paint marking bucket for road marking construction provided by this utility model can evenly conduct heat from the surface of the marking bucket to each heat dissipation plate through a heat spreader, avoiding local heat accumulation; the heat dissipation plate increases the heat dissipation area by increasing the contact area with air, and the ventilation holes on the heat dissipation plate can make air circulation smoother. With the help of the array of cooling fans, the air convection around the heat dissipation plate can be accelerated, and the heat on the heat dissipation plate can be quickly removed through forced air cooling. The synergistic effect of the three significantly improves the heat dissipation efficiency of the marking bucket, effectively alleviates the problems of bucket deformation and accelerated component aging caused by high temperature, extends the service life of the marking bucket, and ensures construction accuracy.

[0014] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This utility model provides a heat dissipation structure for a hot-melt paint marking bucket for road marking construction. Figure 2 This is a schematic diagram of the heat sink structure provided by this utility model; Figure 3 This is a schematic diagram of the cooling fan structure provided by the utility model; Figure 4 This utility model provides Figure 1 The right view;

[0017] Figure label: 1. Heat spreader plate; 2. Heat sink plate; 21. Ventilation port; 22. Flow deflector plate; 3. Cooling fan; 4. Water cooling assembly; 41. Water cooling pipe; 42. Water circulation component; 421. Liquid storage tank; 4211. Grouting port; 422. Water inlet pipe; 423. Water return pipe; 424. Water pump. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] The following is combined Figures 1 to 4 The embodiments shown illustrate the technical solution of this utility model: This utility model embodiment provides a heat dissipation structure for a hot-melt paint marking bucket used in road marking construction, such as... Figures 1 to 4 As shown, it includes: a heat spreader 1, a heat sink 2, and a cooling fan 3. The heat spreader 1 is disposed on the outer wall of the scribing bucket; a plurality of heat sinks 2 are evenly arrayed on the heat spreader 1, and the heat sinks 2 are evenly provided with a plurality of ventilation openings 21 along the length direction; a plurality of cooling fans 3 are arranged in an array along the length direction of the heat sinks 2 on one side of the plurality of heat sinks 2.

[0020] In some embodiments, the heat spreader 1 may be made of copper-aluminum composite material and is attached to the outer wall of the marking bucket by high-temperature resistant epoxy resin adhesive or stainless steel bolts; the heat dissipation plate 2 is made of 6061 aluminum alloy material, with a single piece size of 40cm×10cm×2.5mm, and is arrayed on the heat spreader 1 at a uniform spacing of 7cm, and is fixed to the heat spreader 1 by argon arc welding.

[0021] Ten cooling fans 3 are installed on each side of the marking bucket. The cooling fans 3 are DC brushless axial fans, such as the SF-12038 model, with a voltage of 12V, a power of 40W, a speed of 1800r / min, an air volume of 120m³ / h, and a noise level of 52dB. They are arranged in an array along the length of the heat sink 2 on the side of the heat sink 2 away from the heat spreader 1 and are fixed by angle steel brackets. The distance between the fans and the heat sink 2 is 12cm. The fan power cord is connected to the power supply system of the marking machine and is controlled by the main control system of the marking machine to start and stop.

[0022] Specifically, the heat spreader 1 can evenly transfer the heat from the surface of the marking bucket to each heat dissipation plate 2, avoiding local heat accumulation. The heat dissipation plate 2 increases the heat dissipation area by increasing the contact area with the air. The vents 21 on the heat dissipation plate 2 can make the air flow more smoothly. Together with the array of cooling fans 3, the air convection around the heat dissipation plate 2 can be accelerated. The heat on the heat dissipation plate 2 is quickly removed through forced air cooling. The synergistic effect of the three significantly improves the heat dissipation efficiency of the marking bucket, effectively alleviates the problems of bucket deformation and component aging caused by high temperature, extends the service life of the marking bucket, and ensures the construction accuracy.

[0023] See Figure 1 and Figure 2 In an exemplary embodiment, a guide plate 22 is provided on the top of the vent 21 on the side opposite to the cooling fan 3.

[0024] The guide plate 22 is made of aluminum alloy with a thickness of 1.2mm. The connection angle between the guide plate 22 and the top of the vent 21 is 35°. It is fixed by riveting. Each of the eight vents 21 on each heat sink 2 is equipped with a guide plate 22. The length of the guide plate 22 and the length of the vent 21 are both 6cm and the width is 3cm.

[0025] Specifically, the deflector 22 can guide the external airflow into the vent 21 more smoothly, reduce the flow resistance of the airflow at the vent 21, and at the same time prevent the airflow from forming turbulence near the vent 21, thereby increasing the ventilation volume through the vent 21, enhancing the heat exchange efficiency between the heat sink 2 and the air, and further optimizing the heat dissipation effect.

[0026] See Figure 1 , Figure 2 and Figure 4 In an exemplary embodiment, the system further includes a water-cooling assembly 4, which includes a water-cooling pipe 41 and a water circulation component 42. The water-cooling pipe 41 is disposed within the heat dissipation plate 2 along the circumferential direction of the heat dissipation plate 2, and both the inlet and outlet ends of the water-cooling pipe 41 face the feed inlet of the marking hopper. The water circulation component 42 is installed on the marking hopper and is connected to the inlet and outlet ends of the water-cooling pipe 41, respectively.

[0027] Specifically, the water-cooling pipe 41 is embedded within the heat dissipation plate 2 and distributed along its circumference. The water circulation component 42 and the water-cooling pipe 41 form a closed loop. The water-cooling pipe 41 absorbs heat from the heat dissipation plate 2 through the internally flowing coolant. The water circulation component 42 drives the coolant to circulate, ensuring that the coolant that has absorbed heat is discharged in time and replenished with low-temperature coolant. Together with the heat spreader 1, the heat dissipation plate 2, and the cooling fan 3, it forms a composite heat dissipation mode of "air cooling + water cooling", which greatly improves the heat dissipation capacity. Especially in high-temperature environments or during long-term construction, it can more efficiently control the temperature of the marking box and avoid heat dissipation bottlenecks.

[0028] See Figure 4 In an exemplary embodiment, the water circulation component 42 includes: a storage tank 421, an inlet pipe 422, a return pipe 423, and a pump 424. The storage tank 421 is disposed on a side wall of the marking bucket perpendicular to the heat spreader plate 1, and the storage tank 421 is provided with a grouting port 4211. The inlet pipe 422 is disposed on the marking bucket and is connected to the inlet end of a plurality of water-cooling pipes 41 respectively, and one end of the inlet pipe 422 is connected to the storage tank 421. The return pipe 423 is disposed on the side of the inlet pipe 422 near the heat dissipation plate 2 and is connected to the outlet end of a plurality of water-cooling pipes 41 respectively, and one end of the return pipe 423 is connected to the storage tank 421. The pump 424 is disposed on the inlet pipe 422.

[0029] Among them, the water cooling pipe 41 is made of 304 stainless steel with a diameter of 10mm and a wall thickness of 1.2mm; the liquid storage tank 421 has a double-layer 304 stainless steel body with an outer layer thickness of 1.8mm and an inner layer thickness of 1.2mm, and a volume of 8L; the water inlet pipe 422 and the water return pipe 423 are both made of oil-resistant and heat-resistant PU pipes, and the water inlet pipe 422 is fixed to the side wall of the marking bucket by pipe clamps.

[0030] The storage tank 421 has a double-layer 304 stainless steel body with an outer layer thickness of 1.8mm and an inner layer thickness of 1.2mm. It has a volume of 8L and is filled with a 6mm thick rock wool board (thermal conductivity 0.038W / (m・K)) between the two layers. It is fixed to the side wall on the side of the feed inlet of the marking hopper with M6 stainless steel bolts. The grouting port 4211 at the top of the storage tank 421 has a diameter of 6cm and is equipped with a threaded cap with a silicone rubber sealing gasket. The outer wall of the storage tank 421 has a 20cm×5cm liquid level observation window made of high temperature resistant acrylic sheet.

[0031] The water pump 424 is a miniature centrifugal water pump, model: DC-12V-80W, voltage 12V, power 80W, head 1.5m, flow rate 1.5L / min. The water pump 424 is equipped with 100-mesh stainless steel filters at both the inlet and outlet to prevent impurities from clogging it. The water pump power cord is connected to the power supply system of the marking machine and is controlled by the main control system. It can be started and stopped synchronously with the cooling fan 3.

[0032] Specifically, the liquid storage tank 421 is fixed to the side wall of the marking bucket. The inlet pipe 422 and the return pipe 423 are respectively connected to the water cooling pipe 41 and the liquid storage tank 421. The water pump 424 provides power for water circulation. The liquid storage tank 421 is used to store coolant, and the grouting port 4211 facilitates the replenishment or replacement of coolant. The water pump 424 drives the coolant from the liquid storage tank 421 through the inlet pipe 422 into the water cooling pipe 41. After absorbing heat, it flows back to the liquid storage tank 421 through the return pipe 423, forming a continuous water circulation system. This ensures the continuity and stability of the water cooling process. The forced circulation of the liquid enhances the heat exchange efficiency and further improves the heat dissipation effect of the water cooling component 4.

[0033] The end of the inlet pipe 422 that extends into the liquid storage tank 421 is close to the bottom of the liquid storage tank 421, and the end of the return pipe 423 that extends into the liquid storage tank 421 is close to the top of the liquid storage tank 421.

[0034] Specifically, because hot coolant has a low density and floats easily, the coolant temperature at the bottom of the reservoir 421 is relatively low. Therefore, the inlet pipe 422 draws low-temperature coolant from the bottom into the water-cooling pipe 41, which can maximize the absorption of heat from the heat sink 2. After absorbing heat, the high-temperature coolant flows back to the reservoir 421 from the top of the return pipe 423, avoiding rapid mixing with the low-temperature coolant at the bottom, extending the service efficiency of the low-temperature coolant, improving the heat exchange efficiency of the entire water circulation system, and enhancing the water cooling effect.

[0035] See Figure 1 In an exemplary embodiment, the heat spreader 1, heat sink 2, cooling fan 3, guide plate 22, water cooling pipe 41, water inlet pipe 422, water return pipe 423, and water pump 424 are symmetrically arranged on both sides of the marked bucket, and the two water inlet pipes 422 and the water return pipe 423 are connected to the liquid storage tank 421.

[0036] Specifically, the symmetrical arrangement allows the heat on both sides of the marking bucket to be absorbed and dissipated evenly, avoiding uneven temperature distribution caused by heat dissipation on one side and preventing the marking bucket from deforming due to local overheating; the shared liquid storage tank 421 on both sides simplifies the overall structure, reduces the number of parts, reduces equipment complexity and manufacturing costs, while ensuring the consistency of heat dissipation conditions on both sides and ensuring a balanced and stable heat dissipation effect.

[0037] The liquid storage tank 421 is a double-layered tank (not shown in the figure), with rock wool board installed between the two layers.

[0038] Specifically, the rock wool board has excellent thermal insulation properties, which can effectively block heat from the external environment from entering the liquid storage tank 421, reduce the phenomenon of the coolant in the liquid storage tank 421 rising due to the high temperature of the outside, maintain the low temperature of the coolant, and ensure that it still has a strong heat absorption capacity when it enters the water cooling pipe 41, thus maintaining the stable heat dissipation efficiency of the water cooling system.

[0039] The liquid storage tank 421 is filled with coolant, which can be either silicone oil or high-temperature heat transfer oil.

[0040] The coolant selected can be high-temperature heat transfer oil, such as model L-QB300, with a flash point of 320℃, a kinematic viscosity (40℃) of 25cSt, and an operating temperature range of -10℃ to 300℃. The filling volume in the reservoir 421 is 6L.

[0041] Specifically, silicone oil and high-temperature heat transfer oil have high boiling points and thermal stability, making them suitable for high-temperature environments or scenarios requiring long-term, high-intensity heat dissipation.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A heat dissipation structure for a hot-melt paint marking hopper used in road marking construction, characterized in that, include: A heat spreader (1) is disposed on the outer wall of the scribing hopper; Several heat dissipation plates (2) are evenly arranged on the heat dissipation plate (1), and the heat dissipation plates (2) are evenly provided with multiple ventilation openings (21) along the length direction; Several cooling fans (3) are arranged in an array along the length of the heat sink (2) on one side of the multiple heat sinks (2).

2. The heat dissipation structure of the hot-melt paint marking hopper for road marking construction according to claim 1, characterized in that, The top of the vent (21) facing away from the cooling fan (3) is provided with a guide plate (22).

3. The heat dissipation structure of the hot-melt paint marking hopper for road marking construction according to claim 1, characterized in that, It also includes a water-cooling assembly (4), which comprises: A water-cooled pipe (41) is arranged inside the heat dissipation plate (2) along the circumference of the heat dissipation plate (2), and the water inlet and outlet of the water-cooled pipe (41) are both facing the feed inlet of the marking hopper. The water circulation component (42) is installed on the marking bucket and is connected to the inlet and outlet of the water cooling pipe (41) respectively.

4. The heat dissipation structure of the hot-melt paint marking hopper for road marking construction according to claim 3, characterized in that, The water circulation component (42) includes: A liquid storage tank (421) is provided on one side wall of the marking bucket perpendicular to the heat spreader (1), and the liquid storage tank (421) is provided with a grouting port (4211); A water inlet pipe (422) is installed on the marking bucket and is connected to the water inlet end of a plurality of water cooling pipes (41). One end of the water inlet pipe (422) is connected to the liquid storage tank (421). The return water pipe (423) is located on the side of the inlet water pipe (422) near the heat sink (2) and is connected to the outlet of the plurality of water cooling pipes (41). One end of the return water pipe (423) is connected to the liquid storage tank (421). A water pump (424) is installed on the water inlet pipe (422).

5. The heat dissipation structure of the hot-melt paint marking hopper for road marking construction according to claim 4, characterized in that, The end of the inlet pipe (422) that extends into the liquid storage tank (421) is close to the bottom of the liquid storage tank (421), and the end of the return pipe (423) that extends into the liquid storage tank (421) is close to the top of the liquid storage tank (421).

6. The heat dissipation structure of the hot-melt paint marking hopper for road marking construction according to claim 4, characterized in that, The heat spreader (1), the heat dissipation plate (2), the cooling fan (3), the water cooling pipe (41), the water inlet pipe (422), the water return pipe (423), and the water pump (424) are symmetrically arranged on both sides of the marking bucket, and the two water inlet pipes (422) and the water return pipe (423) are all connected to the liquid storage tank (421).

7. The heat dissipation structure of the hot-melt paint marking hopper for road marking construction according to claim 4, characterized in that, The liquid storage tank (421) is a double-layered tank, with a rock wool board installed between the two layers.

8. The heat dissipation structure of the hot-melt paint marking hopper for road marking construction according to claim 4, characterized in that, The storage tank (421) is provided with coolant, which can be either silicone oil or high-temperature heat transfer oil.

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