Road roller fuel cooling device and vibratory road roller

Abstract

The utility model discloses a road roller fuel cooling device and vibration road roller, include: the heat dissipation pipe, present U type or M type, its both ends are first pipe mouth and second pipe mouth, the heat dissipation pipe is installed on the road roller and is located the air inlet end of radiator, fuel pipe, including first fuel pipe and second fuel pipe, first fuel pipe one end is connected with first pipe mouth, and the other end is connected with the oil return port of engine, second fuel pipe one end is connected with second pipe mouth, and the other end is connected with the oil return port of fuel tank, the inner diameter of heat dissipation pipe is greater than the inner diameter of fuel pipe, the protective net is installed on the road roller and is located the top of heat dissipation pipe, is used for preventing the foreign matter falling and damaging heat dissipation pipe. The utility model can ensure the normal construction of vibration road roller under the very little, high temperature high load extreme condition of fuel tank in fuel oil.

Description

Technical Field

[0001] This utility model relates to a fuel cooling device for road rollers and a vibratory road roller, belonging to the field of road roller fuel technology. Background Technology

[0002] Currently, the fuel cooling of vibratory rollers mainly relies on the engine's return fuel mixing mechanism: after the high-temperature fuel returns from the engine to the fuel tank, it mixes naturally with the low-temperature fuel remaining in the tank to achieve heat transfer, thereby achieving the cooling purpose. This cooling method can meet basic usage requirements under normal operating conditions (such as sufficient fuel tank capacity and medium to low load operation), and the fuel temperature can be controlled within a reasonable range through the heat capacity buffer of the fuel in the tank.

[0003] However, under two extreme conditions, the cooling capacity of this cooling method is significantly insufficient: (1) Low fuel level: When the fuel level in the fuel tank is very low, the thermal buffer capacity of the low-temperature fuel drops sharply. After the high-temperature return fuel mixes with a small amount of low-temperature fuel, the overall oil temperature tends to rise rapidly; (2) High temperature and high load: When the ambient temperature is high (such as midday in summer) and the road roller is continuously operating under high load (such as heavy-load compaction), the engine return oil temperature rises significantly, far exceeding the heat dissipation capacity of conventional mixed cooling. Both of the above situations will lead to high fuel temperature (usually exceeding 80°C), which may not only cause poor fuel atomization and reduced combustion efficiency, but also accelerate the aging of fuel system components (such as fuel pumps and fuel injectors), affecting the normal operation and service life of the equipment. Summary of the Invention

[0004] To address the problems existing in the prior art, this utility model provides a fuel cooling device for a road roller and a vibratory road roller, which can ensure the normal operation of the vibratory road roller under extreme conditions such as low fuel level in the fuel tank and high temperature and high load.

[0005] To achieve the above objectives, this utility model employs a road roller fuel cooling device, comprising:

[0006] The heat dissipation pipe is U-shaped or M-shaped, with a first pipe opening and a second pipe opening at its two ends. The heat dissipation pipe is installed on the road roller and is located at the air inlet end of the radiator.

[0007] The fuel line includes a first fuel line and a second fuel line. One end of the first fuel line is connected to a first port and the other end is connected to the fuel return port of the engine. One end of the second fuel line is connected to a second port and the other end is connected to the fuel return port of the fuel tank. The inner diameter of the cooling pipe is larger than the inner diameter of the fuel line.

[0008] A protective net is installed on the road roller and above the heat dissipation pipes to prevent foreign objects from falling and damaging the heat dissipation pipes.

[0009] As an improvement, the heat dissipation pipe and the fuel pipe are connected by a connector assembly;

[0010] The connector assembly includes a quick-connect connector and a plug fitting that mates with the quick-connect connector. The quick-connect connector is threadedly connected to a first port and a second port, and the plug fitting is installed on a first fuel pipe and a second fuel pipe.

[0011] As an improvement, a combination gasket for sealing is installed between the quick-connect fitting and both the first and second ports.

[0012] As an improvement, the heat dissipation pipe is made of copper or steel.

[0013] As an improvement, the heat pipe is mounted on the radiator bracket via a connecting plate.

[0014] As an improvement, the connecting plate includes a first connecting plate and a second connecting plate with the same structure and installed opposite to each other on both sides of the heat dissipation pipe;

[0015] Both the first and second connecting plates include a horizontal plate for fixing the heat dissipation pipe and a vertical plate for connecting the heat dissipation bracket. The horizontal plate is equipped with a pipe clamp for connecting the heat dissipation pipe. One end of the vertical plate is connected to the horizontal plate, and the other end is bent. Both the horizontal plate and the vertical plate have bolt holes at their bent ends.

[0016] In a second aspect, this utility model also provides a vibratory roller, wherein the vibratory roller is equipped with the aforementioned roller fuel cooling device.

[0017] As an improvement, the vibratory roller includes a fan located below the radiator and used for air intake and heat dissipation.

[0018] This utility model discloses a fuel cooling device for road rollers. Building upon the traditional cooling method that relies on the mixing and cooling of low-temperature fuel within the fuel tank, it adds an independent forced fuel cooling path: after the high-temperature fuel is discharged from the engine's return port, it first flows through a high-performance cooling pipe (using a U-shaped / M-shaped structure to increase the heat exchange area and a low-flow-rate design to extend the cooling time) before returning to the fuel tank. This additional cooling path, combined with the air intake fan of the radiator, creates a synergistic effect. The continuous cool air introduced by the fan directly acts on the cooling pipe, significantly enhancing the fuel's cooling efficiency.

[0019] This device specifically addresses the shortcomings of traditional cooling methods under extreme conditions: when the fuel level in the fuel tank is low, the mixing of fuel in the tank alone is insufficient to meet the cooling requirements. The fuel cooling device for road rollers of this invention effectively controls the fuel temperature through active heat dissipation. Even in high-temperature and high-load environments (such as continuous heavy-load operation or excessively high ambient temperature), it can still ensure that the fuel is within the normal operating temperature range through enhanced heat exchange, thereby ensuring stable fuel supply to the engine of the vibratory road roller, avoiding power loss or shutdown caused by high fuel temperature, and ensuring continuous and normal construction under extreme conditions. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application 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 only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the installation structure of the fuel cooling device of this utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the fuel cooling device of this utility model;

[0023] In the diagram: 1. Fuel tank, 2. Engine, 3. Fan, 4. Radiator, 5. Fuel cooling device, 5-1. First connecting plate, 5-2. Bolt, 5-3. Cooling pipe, 5-4. Second connecting plate, 5-5. Combination washer, 5-6. Quick connector, 5-7. Connector, 5-8. First fuel pipe, 5-9. Second fuel pipe, 5-10. Pipe clamp, 6. Protective net. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this application will be described in detail below through specific embodiments. It should be understood that the embodiments of this application and the specific features in the embodiments are detailed descriptions of the technical solutions of this application, rather than limitations on the technical solutions of this application. In the absence of conflict, the embodiments of this application and the technical features in the embodiments can be combined with each other.

[0025] In the description of this utility model, it should be understood that the terms "longitudinal," "transverse," etc., indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] like Figure 1 , Figure 2 As shown, a road roller fuel cooling device includes a heat dissipation pipe 5-3, a fuel pipe, and a protective net;

[0027] The heat dissipation pipe 5-3 is U-shaped or M-shaped, with a first pipe opening and a second pipe opening at its two ends. The heat dissipation pipe 5-3 is installed on the road roller and located at the air inlet end of the radiator 4. The U-shaped or M-shaped design of the heat dissipation pipe 5-3 significantly expands the contact area with air by increasing the pipe length and the number of bends, providing sufficient heat exchange space for fuel cooling. The heat dissipation pipe 5-3 is installed at the air inlet end of the radiator, which can make full use of the continuous airflow generated when the fan 3 is working. The cold air drawn in by the fan 3 flows directly over the surface of the heat dissipation pipe 5-3, forming efficient convective heat exchange and accelerating the dissipation of fuel heat. As a key channel for fuel flow, the structural stability of the heat dissipation pipe 5-3 can ensure that the high-temperature fuel flows smoothly in the pipe and avoid the heat dissipation effect being affected by pipe deformation or blockage.

[0028] The fuel lines include a first fuel line 5-8 and a second fuel line 5-9. One end of the first fuel line 5-8 is connected to a first port, and the other end is connected to the fuel return port of the engine 2. One end of the second fuel line 5-9 is connected to a second port, and the other end is connected to the fuel return port of the fuel tank 1. The inner diameter of the cooling pipe 5-3 is larger than that of the fuel lines. The first fuel line 5-8 and the second fuel line 5-9, together with the cooling pipe 5-3, form a complete fuel circulation path, allowing the high-temperature fuel discharged from the engine 2 to flow into the cooling pipe 5-3 for cooling before returning to the fuel tank 1. This forms a closed-loop system of engine fuel return → cooling pipe cooling → fuel tank storage, ensuring continuous and controllable fuel cooling process. In addition, the design of the cooling pipe 5-3 having a larger inner diameter than the fuel line reduces the flow velocity of fuel within the cooling pipe 5-3, prolongs the cooling time, and allows the fuel more opportunities to exchange heat with the pipe wall and external cold air, further improving cooling efficiency.

[0029] The protective net 6 is installed on the road roller and located above the heat exchange pipe 5-3. It can block foreign objects such as gravel, mud, sand, and branches that may fall in the construction environment, prevent them from hitting or covering the heat exchange pipe 5-3, prevent the surface of the heat exchange pipe 5-3 from being damaged, deformed, or blocked, and ensure that the heat exchange area of ​​the heat exchange pipe 5-3 is not affected.

[0030] In some embodiments, such as Figure 2 As shown, the heat dissipation pipe 5-3 is connected to the fuel pipe via a connector assembly. The connector assembly includes a quick-connect connector 5-6 and a plug-in piece 5-7, forming a matching quick-connect structure. The quick-connect connector 5-6 is threaded onto the first and second ports of the heat dissipation pipe 5-3, ensuring an initial seal between the connector and the ports. The plug-in piece 5-7 is installed at the ends of the first fuel pipe 5-8 and the second fuel pipe 5-9, achieving rapid connection between the fuel pipe and the heat dissipation pipe through precise engagement with the quick-connect connector 5-6. This connector assembly features a quick-connect design, eliminating the need for complex tools. Connection is achieved through direct engagement between the plug-in piece and the quick-connect connector, significantly reducing operation time during installation, maintenance, or component replacement. It is particularly suitable for rapid maintenance needs on construction sites, reducing labor costs.

[0031] In some embodiments, such as Figure 2 As shown, a combination washer 5-5 is installed at the connection points between the quick-connect fitting 5-6 and the first and second ports of the heat sink 5-3. This combination washer 5-5 serves as a key sealing element, forming a synergistic sealing structure with the quick-connect fitting 5-6. The combination washer 5-5 is typically composed of a metal ring and an elastic material (such as rubber). The metal ring ensures structural strength, while the elastic material provides sealing preload. When the quick-connect fitting 5-6 is fixed to the port via a threaded connection, the combination washer 5-5 is pressed between the contact surfaces of the fitting and the port. The elastic material deforms due to compression, tightly filling the tiny gaps in the contact surface, while the metal ring enhances the pressure resistance of the seal. Combined with the axial preload of the threaded connection, this provides a dual guarantee of mechanical fixation and elastic sealing.

[0032] In some embodiments, the heat dissipation pipe 5-3 is made of copper or steel, which is low in cost, easy to process, and has good heat dissipation performance.

[0033] In some embodiments, such as Figure 2As shown, the heat dissipation pipe 5-3 is mounted on the radiator bracket via a connecting plate. The connecting plate adopts a symmetrical design, including a first connecting plate 5-1 and a second connecting plate 5-4 with identical structures, which are respectively installed on both sides of the heat dissipation pipe 5-3. This double-sided symmetrical structure can form a balanced clamping force on the heat dissipation pipe 5-3, avoiding force displacement caused by unilateral fixation, and further improving installation stability. In addition, both the first and second connecting plates include a horizontal plate for fixing the heat dissipation pipe 5-3 and a vertical plate for connecting the radiator bracket. A pipe clamp 5-10 is installed on the horizontal plate, which tightly fixes the heat dissipation pipe 5-3 to the horizontal plate through a wrap-around clamping action, ensuring a secure fixation while preventing excessive compression that could deform the pipe wall. One end of the vertical plate is perpendicularly connected to the horizontal plate to form an integral structure, while the other end is bent and then connected to the radiator bracket. The bending angle can be adjusted according to the inclination of the bracket mounting surface, enhancing installation compatibility. Furthermore, the bent design at one end of the vertical plate shortens the connection distance between the vertical plate and the radiator bracket, reducing the lever arm length and lowering the risk of bolt 5-2 loosening due to vibration. Bolt holes are provided at the bent ends of both the horizontal and vertical plates for installing bolts 5-2. The bolts 5-2 on the horizontal plate can be locked with the pipe clamp 5-10, ensuring that the pipe clamp 5-10 does not loosen during long-term use and maintaining the positional accuracy of the heat dissipation pipe 5-3. The bolts 5-2 on the vertical plate can be fixed to the radiator bracket.

[0034] Finally, in a second aspect, this utility model also provides a vibratory roller, which is equipped with a fuel tank 1, an engine 2, a fan 3, a radiator 4, a fuel cooling device 5, and a protective net 6. The fuel tank 1 provides fuel for the engine 2, which serves as the power core to drive the roller. The heat generated during its operation is dissipated through the radiator 4. The fan 3 is located below the radiator 4 and draws cool air into the radiator 4 through suction to cool the engine coolant, hydraulic oil, etc. The fuel cooling device 5 is installed at the air inlet of the radiator 4 and shares the cooling airflow generated by the fan 3 with the radiator 4. The protective net 6 covers the fuel cooling device 5 to provide targeted protection.

[0035] When the vibratory roller is in operation, the fuel cooling device 5 exhibits a synergistic mechanism of "fuel circulation heat dissipation" and "airflow enhanced cooling":

[0036] High-temperature fuel (typically exceeding 80°C) is discharged from the return port of engine 2 and then transported to quick-connect fitting 5-6 via the first fuel pipe 5-8. It then enters the interior of cooling pipe 5-3 through the first opening of cooling pipe 5-3. Because cooling pipe 5-3 employs a U-shaped or M-shaped design and has an inner diameter larger than that of the fuel pipe, the fuel flow rate within cooling pipe 5-3 is reduced. Simultaneously, the use of copper or high-heat-dissipation steel in cooling pipe 5-3 allows the heat from the fuel to be rapidly transferred to the external environment through the pipe wall.

[0037] The cooled fuel (with a temperature drop of 15-25℃) is transported back to the fuel tank 1 via the quick-connect fitting 5-6 at the second port of the cooling pipe 5-3 and the second fuel pipe 5-9, forming a complete fuel circulation cooling circuit.

[0038] At the same time, the fan 3 of the vibratory roller operates at high speed to generate a strong airflow. The airflow is drawn in from the air inlet of the radiator 4 and flows through the fuel cooling device 5 installed at that location. On the one hand, the airflow directly carries away the heat on the surface of the heat dissipation pipe 5-3, enhancing the heat dissipation efficiency of the fuel inside the pipe. On the other hand, the exhaust effect of the fan 3 increases the air intake in the radiator 4 area, continuously providing a low-temperature cooling medium for the heat dissipation pipe 5-3.

[0039] In addition, the protective net 6 at the top of the fuel cooling device 5 effectively intercepts foreign objects such as gravel and dust in the construction environment without obstructing airflow, preventing them from impacting or adhering to the surface of the heat dissipation pipe 5-3 and affecting the heat dissipation effect, thus ensuring the stable operation of the entire cooling system under extreme conditions.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fuel cooling device for a road roller, characterized in that, include: The heat dissipation pipe (5-3) is U-shaped or M-shaped, with the first pipe opening and the second pipe opening at its two ends respectively. The heat dissipation pipe (5-3) is installed on the road roller and located at the air inlet end of the radiator (4). The fuel pipe includes a first fuel pipe (5-8) and a second fuel pipe (5-9). One end of the first fuel pipe (5-8) is connected to a first pipe port, and the other end is connected to the fuel return port of the engine (2). One end of the second fuel pipe (5-9) is connected to a second pipe port, and the other end is connected to the fuel return port of the fuel tank (1). The inner diameter of the cooling pipe (5-3) is larger than the inner diameter of the fuel pipe. A protective net (6) is installed on the road roller and located above the heat dissipation pipe (5-3) to prevent foreign objects from falling and damaging the heat dissipation pipe (5-3).

2. The road roller fuel cooling device according to claim 1, characterized in that, The heat dissipation pipe (5-3) is connected to the fuel pipe via a connector assembly; The connector assembly includes a quick-connect connector (5-6) and a plug-in component (5-7) that mates with the quick-connect connector (5-6). The quick-connect connector (5-6) is threadedly connected to a first port and a second port, and the plug-in component (5-7) is mounted on a first fuel pipe (5-8) and a second fuel pipe (5-9).

3. The road roller fuel cooling device according to claim 2, characterized in that, A combination gasket (5-5) for sealing is installed between the quick-connect connector (5-6) and the first and second ports.

4. The road roller fuel cooling device according to claim 1, characterized in that, The heat dissipation pipe (5-3) is made of copper or steel.

5. A road roller fuel cooling device according to claim 1, characterized in that, The heat dissipation pipe (5-3) is mounted on the radiator bracket via a connecting plate.

6. A road roller fuel cooling device according to claim 5, characterized in that, The connecting plate includes a first connecting plate (5-1) and a second connecting plate (5-4) with the same structure and installed opposite to each other on both sides of the heat dissipation pipe (5-3); Both the first and second connecting plates include a horizontal plate for fixing the heat dissipation pipe (5-3) and a vertical plate for connecting the heat dissipation bracket. The horizontal plate is equipped with a pipe clamp (5-10) connected to the heat dissipation pipe (5-3). One end of the vertical plate is connected to the horizontal plate, and the other end is bent. Both the horizontal plate and the vertical plate have bolt holes at their bent ends.

7. A vibratory roller, characterized in that, The vibratory roller is equipped with a roller fuel cooling device as described in any one of claims 1-5.

8. A vibratory roller according to claim 7, characterized in that, The vibratory roller includes a fan (3), which is located below the radiator (4) and is used for air intake and heat dissipation.

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