Engine exhaust cooling device and engineering vehicle

Abstract

The application provides an engine exhaust cooling device and an engineering vehicle. The engine exhaust cooling device comprises a heat exchanger and a radiator. The heat exchanger has a shell and an exhaust pipe. The shell has a cavity, an inlet, an outlet, a water inlet and a water outlet. The exhaust pipe is arranged in the cavity. Two ends of the exhaust pipe are communicated with the inlet and the outlet respectively. The water inlet and the water outlet are communicated with the cavity. The radiator has a radiator pipe. Two ends of the radiator pipe are connected to the water inlet and the water outlet through connecting water pipes. A water pump is arranged on the connecting water pipe. The exhaust pipe of the engineering vehicle is communicated with each exhaust pipe. The exhaust pipe and the liquid in the cavity exchange heat, which can effectively reduce the exhaust emission temperature of the engine and reduce the safety hazard.

Description

Technical Field

[0001] This application relates to the field of internal combustion engineering vehicles and engineering machinery, and in particular to an engine exhaust cooling device and an engineering vehicle. Background Technology

[0002] With the strong advocacy of national energy conservation and emission reduction and the implementation of the National IV emission regulations for non-road vehicles, Stage IV emission engines are gradually replacing low-emission engines as the power drive components in the fields of internal combustion rail vehicles and construction machinery. It is well known that engines have high exhaust gas temperatures. In particular, Stage IV emission engines, in order to meet emission limits, are typically equipped with an exhaust aftertreatment system. This aftertreatment system has a DPF regeneration function, which requires raising the exhaust temperature to 450°C to 650°C during DPF regeneration to burn off carbon deposits in the aftertreatment system.

[0003] However, in flammable environments such as dusty areas, oil depots, and chemical plants, the high temperature of engine exhaust gases can become a source of ignition, causing fires or explosions. In poorly ventilated enclosed spaces such as garages and tunnels, the high temperature of exhaust emissions may not dissipate quickly, causing harm to personnel or equipment. Therefore, how to reduce the temperature of engine exhaust emissions is a technical problem that urgently needs to be solved by those skilled in the art.

[0004] In view of the above, this application is hereby submitted. Utility Model Content

[0005] To address one of the aforementioned technical deficiencies, this application provides an engine exhaust cooling device and an engineering vehicle.

[0006] The first aspect of this application provides an engine exhaust gas cooling device, comprising:

[0007] A heat exchanger having a shell and a flue pipe, the shell having a cavity, a flue inlet, a flue outlet, a water inlet, and a water outlet, the flue pipe being disposed in the cavity, the two ends of the flue pipe being connected to the flue inlet and the flue outlet respectively, and the water inlet and the water outlet being connected to the cavity;

[0008] A radiator having a heat dissipation pipe, the two ends of which are connected to the inlet and outlet via connecting water pipes, and a water pump is installed on the connecting water pipes.

[0009] Optionally, the heat exchanger includes a plurality of exhaust pipes, each exhaust pipe being disposed within the cavity, and there being a gap between each exhaust pipe;

[0010] A liquid-containing space is formed between the inner wall of the housing and the outer wall of the exhaust pipe;

[0011] Both the inlet and outlet are connected to the containment space.

[0012] Optionally, the housing includes a main cylindrical shell, two end shells, and two end plates;

[0013] The main shell is provided with the water inlet and the water outlet;

[0014] The two end plates are respectively disposed at both ends of the main shell and cover the ports at both ends of the main shell. Through holes are provided on the end plates.

[0015] Each of the exhaust pipes is located inside the main cylinder shell, and both ends are connected to the through holes on the two end plates respectively;

[0016] The two end shells are respectively disposed at both ends of the main cylinder shell and located on the side of the corresponding end plate away from the main cylinder shell. The two end shells are respectively provided with the smoke inlet and the smoke outlet. The smoke inlet is connected to each through hole on one end plate, and the smoke outlet is connected to each through hole on the other end plate.

[0017] Optionally, the shell includes a first shell section, a second shell section, and an expansion and deformation section;

[0018] The water outlet and the flue gas inlet are provided on the first shell section;

[0019] The water inlet and the smoke outlet are provided on the second shell section;

[0020] The expansion and deformation segment is located between the first shell segment and the second shell segment, and connects the first shell segment and the second shell segment respectively.

[0021] Optionally, the radiator includes a housing and a fan;

[0022] The heat dissipation pipe is disposed inside the housing, and the fan is mounted on the housing;

[0023] The heat exchanger is located on one side of the housing and near one corner of the housing.

[0024] Optionally, the heat exchanger and each of the fans are located on the same side of the housing.

[0025] Optionally, the radiator includes at least two fans, each of which is arranged sequentially along the length of the heat exchanger.

[0026] Optionally, the engine exhaust cooling system includes an expansion tank;

[0027] The expansion tank is located on top of the radiator;

[0028] The expansion tank is connected to the heat dissipation pipe.

[0029] Optionally, both the heat exchanger and the radiator are provided with shock-absorbing mounting brackets for connection and fixation.

[0030] A second aspect of this application provides an engineering vehicle, comprising:

[0031] The vehicle body has an exhaust pipe;

[0032] The aforementioned engine exhaust cooling device has its heat exchanger and radiator connected to the vehicle body, and its smoke inlet connected to the exhaust pipe.

[0033] By adopting the above technical solution, this application has the following beneficial effects:

[0034] The exhaust pipe of the engineering vehicle described in this application connects to various exhaust pipes, and heat exchange occurs between the exhaust pipes and the liquid within the cavity, effectively reducing the temperature of the engine exhaust and minimizing safety hazards. The liquid circulates between the radiator and the housing; the liquid heated by the engine exhaust flows to the radiator side where it is cooled, and then flows back into the heat exchanger to continue cooling the engine exhaust, thus effectively cooling the engine exhaust and improving vehicle safety. Attached Figure Description

[0035] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0036] Figure 1 This diagram shows a three-dimensional structural schematic of the engine exhaust gas cooling device provided in an embodiment of the present disclosure;

[0037] Figure 2 This diagram illustrates the structure of a heat exchanger in an engine exhaust cooling device provided in an embodiment of the present disclosure.

[0038] In the diagram: 1. Heat exchanger; 11. Shell; 11a. First shell section; 11b. Second shell section; 11c. Expansion and deformation section; 111. Main shell; 1111. Water inlet; 1112. Water outlet; 112. End plate; 113. End shell; 1131. Smoke inlet; 1132. Smoke outlet; 12. Smoke exhaust pipe; 2. Radiator; 21. Shell; 22. Fan; 3. Connecting water pipe; 4. Water pump; 5. Expansion tank; 6. Vibration damping mounting base. Detailed Implementation

[0039] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0040] In the description of this application and its embodiments, it should be understood that the terms "top", "bottom", "height", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this application 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 of this application.

[0041] In this application and its embodiments, unless otherwise expressly specified and limited, the terms "set," "install," "connect," "link," "fix," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0042] In this application and its embodiments, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] like Figure 1 and Figure 2As shown, this application embodiment provides an engine exhaust cooling device, including: a heat exchanger 1 and a radiator 2. The heat exchanger 1 has a housing 11 and an exhaust pipe 12. The housing 11 has a cavity, an exhaust port 1131, an exhaust port 1132, a water inlet 1111, and a water outlet 1112. The exhaust pipe 12 is disposed in the cavity, and its two ends are respectively connected to the exhaust port 1131 and the exhaust port 1132. The water inlet 1111 and the water outlet 1112 are both connected to the cavity. The radiator 2 has a heat dissipation pipe, and its two ends are respectively connected to the water inlet 1111 and the water outlet 1112 via a connecting water pipe 3. A water pump 4 is disposed on the connecting water pipe 3.

[0044] The radiator 2 may include heat dissipation fins, which are connected to heat dissipation pipes to increase the heat exchange area between the heat dissipation pipes and the outside air, thereby improving heat dissipation efficiency. The heat dissipation pipes may be flat, which can further increase the heat exchange area.

[0045] Heat exchanger 1 is used for heat exchange between the circulating coolant and the exhaust gas to remove heat from the exhaust gas. The exhaust pipe of the engineering vehicle is connected to each exhaust pipe 12. The outer wall of the exhaust pipe 12 is covered with liquid in the cavity, which can exchange heat with the liquid in the cavity, effectively reducing the exhaust gas temperature and reducing safety hazards. The liquid circulates between radiator 2 and heat exchanger 1. The liquid heated by the engine exhaust gas flows to the side of radiator 2 and is cooled down. The cooled liquid flows back into heat exchanger 1 to continue cooling the engine exhaust gas, thus providing stable and effective cooling of the engine exhaust gas and improving vehicle safety.

[0046] In some possible implementations, such as Figure 2 As shown, the heat exchanger 1 includes multiple exhaust pipes 12, each disposed within a cavity. Gaps exist between the exhaust pipes 12 to increase the contact area with the liquid. A space for accommodating coolant is formed between the inner wall of the casing 11 and the outer wall of the exhaust pipes 12. This space is isolated from the cavities of each exhaust pipe 12, preventing liquid from entering the cavities. Both the inlet 1111 and the outlet 1112 are connected to this space. After the liquid enters the cavity through the inlet 1111 and undergoes sufficient heat exchange with the exhaust pipes 12, it is discharged through the outlet 1112. The arrangement of multiple exhaust pipes 12 increases the contact area between the exhaust gas and the coolant, improving the cooling effect.

[0047] In some possible implementations, such as Figure 2As shown, the housing 11 includes a main cylindrical shell 111, two end shells 113, and two end plates 112. The main cylindrical shell 111 has ports at both ends, and an inlet 1111 and an outlet 1112 are provided on the cylinder wall. The two end plates 112 are located at both ends of the main cylindrical shell 111 and cover the ports at both ends of the main cylindrical shell 111. Through holes are provided on the end plates 112. Each exhaust pipe 12 is located inside the main cylindrical shell 111, and its two ends are connected to the through holes on the two end plates 112. The two end shells 113 are located at both ends of the main cylindrical shell 111 and are situated on the side of the corresponding end plate 112 facing away from the main cylindrical shell 111. The two end shells 113 cover the corresponding end plate 112. The end plates 112 and the main cylindrical shell 111 can be welded or connected by fasteners. The end shells 113 and the main cylindrical shell 111 can be fixed together by flanges. The two end shells 113 are respectively provided with a smoke inlet 1131 and a smoke outlet 1132. The smoke inlet 1131 is connected to each through hole on one end plate 112, and the smoke outlet 1132 is connected to each through hole on the other end plate 112.

[0048] A liquid-containing space is formed between the inner wall of the main shell 111 and the two end plates 112. After the two end shells 113 are connected to the main shell 111, the cavity formed between the end shell 113 and the end plate 112 is isolated from the liquid-containing space, and water will not enter the cavity. The hot exhaust gas entering through the flue gas inlet 1131 of one end shell 113 will be diverted to the through holes on the end plate 112 and then enter the respective exhaust pipes 12.

[0049] In some possible implementations, such as Figure 1 As shown, the shell 11 includes a first shell section 11a, a second shell section 11b, and an expansion and deformation section 11c. The first shell section 11a has a water outlet 1112 and a flue gas inlet 1131, while the second shell section 11b has a water inlet 1111 and a flue gas outlet 1132. The expansion and deformation section 11c is located between the first shell section 11a and the second shell section 11b, and connects both sections. The expansion and deformation section 11c can be an expansion joint, used to absorb the deformation of the heat exchanger 1 after heating. The expansion joint absorbs the axial displacement between the first shell section 11a and the second shell section 11b through elastic deformation, reducing thermal stress caused by temperature differences and preventing severe deformation damage to the shell 11. The expansion joint can absorb the deformation of the piping system caused by temperature changes, preventing damage to the shell 11 system due to uneven thermal expansion, and ensuring the safety and stability of the heat exchange piping system.

[0050] In some possible implementations, such as Figure 2 As shown, the radiator 2 includes a housing 21 and a fan 22. The heat dissipation pipe is disposed inside the housing 21, the fan 22 is installed on the housing 21, and the heat exchanger 1 is disposed on one side of the housing 21 and close to one corner of the housing 21.

[0051] The heat exchanger 1 and the outer casing 21 can be connected, or they can be not directly connected and are respectively fixed to the vehicle body. By placing the heat exchanger 1 at a corner near the outer casing 21, the distance between the heat exchanger 1 and the outer casing 21 is small, and the placement of other structural components on the outer casing 21 is avoided. This does not affect the placement of various structural components of the radiator 2, such as the fan 22, making the entire engine exhaust cooling device compact in structure and small in size, and easy to install on engineering vehicles.

[0052] After the fan 22 is started, it can generate a high-speed airflow. The high-speed airflow can carry away some heat through the heat dissipation pipe, thereby reducing the liquid temperature. In this application, the heat exchanger 1 is placed on one side of the housing 21 and close to one corner of the housing 21, avoiding the fan 22 and making full use of the space. This helps to reduce the space occupied by the entire cooling device and achieves a compact design.

[0053] The fan 22 may include a motor and fan blades. The fan blades are connected to the motor shaft. The motor is mounted on the outer casing of the radiator 2 near the heat exchanger 1. By driving the fan blades, a forced airflow can be formed to promote the dissipation of heat from the coolant inside the radiator 2 core. The specific number of motors can be configured according to the engine exhaust cooling power. It should be noted that the fan 22 is not limited to using an electric motor; a hydraulic motor can also be used to drive the fan blades.

[0054] The coolant can be cooling water. Using cooling water as the intermediate medium for heat exchange, heat exchanger 1 transfers heat from the engine exhaust to the cooling water. The heated cooling water flows into radiator 2 under the action of water pump 4. Fan 22 drives the fan to generate forced airflow, promoting heat exchange between the heated cooling water in radiator 2 and the air. The cooled water after heat exchange is circulated back into heat exchanger 1 for the next cycle, thereby achieving the cooling of engine exhaust.

[0055] When the engine is running, the exhaust gas temperature signal can be collected. When the exhaust gas temperature reaches a certain set value, the water pump 4 and fan 22 can be activated, putting the exhaust gas cooling device into operation. The radiator 2 can be designed in different sizes according to the overall equipment space and heat dissipation performance requirements. The number of fans 22 can be one, two, or more than two, and the heat exchanger 1 can be installed horizontally or vertically. This minimizes the space occupied by the cooling system, while greatly saving energy and reducing costs, achieving the technical effect of cost reduction and efficiency improvement.

[0056] like Figure 1As shown, in some possible embodiments, each fan 22 is disposed on the side of the housing 21 near the heat exchanger 1. The heat exchanger 1 is located on one side of the housing 21 along its thickness direction, and at least part of the structure of the fan 22 protrudes from the housing 21. Disposing the fan 22 on the side of the housing 21 near the heat exchanger 1, that is, placing the fan 22 and the heat exchanger 1 on the same side of the housing 21, rather than on opposite sides, helps to reduce the space occupied by the entire cooling device and achieves a compact design.

[0057] In some possible implementations, the radiator 2 includes at least two fans 22, which are arranged sequentially along the length of the heat exchanger 1. The heat exchanger 1 is a long tube, and each fan 22 and the heat exchanger 1 are located on the same side of the outer casing 21 of the radiator 2. The fans 22 are arranged sequentially along the length of the heat exchanger 1, and the fans 22 and the heat exchanger 1 are arranged on the same side but staggered from each other, which makes full use of space and helps to reduce the volume of the entire cooling device.

[0058] In some possible implementations, the engine exhaust cooling system includes an expansion tank 5, which is located on top of the radiator 2 and connected to the cooling pipes. The expansion tank 5, the heat exchanger, and the radiator 2 form a circulating water channel. The expansion tank 5 serves to store expansion volume. When the water temperature rises, the liquid expands due to thermal expansion and contraction; the expansion tank 5 can hold liquid exceeding its normal capacity, preventing excessive system pressure from damaging components. The expansion tank 5 helps maintain pressure stability by buffering pressure fluctuations, keeping the system pressure within the design range, and preventing high pressure from damaging components or low pressure from causing boiling. The expansion tank 5 also serves to vent and replenish water.

[0059] In some possible implementations, both the heat exchanger 1 and the radiator 2 are provided with shock-absorbing mounting brackets 6 for connection and fixation. When installed on engineering vehicles, these brackets can buffer vibrations, reduce noise, and help extend the stability of the assembly structure of the engine exhaust cooling device and the vehicle body.

[0060] This application also provides an engineering vehicle, including: a vehicle body and the aforementioned engine exhaust cooling device. The vehicle body has an exhaust pipe, and the heat exchanger 1 and radiator 2 of the engine exhaust cooling device are respectively connected to the vehicle body. The smoke inlet 1131 is connected to the exhaust pipe of the vehicle body. That is, the exhaust pipe of the engineering vehicle is connected to each exhaust pipe 12. The outer wall of the exhaust pipe 12 is covered with liquid in the cavity, which can exchange heat with the liquid in the cavity, effectively reducing the exhaust temperature of the engine exhaust and reducing safety hazards. The coolant circulates between the radiator 2 and the heat exchanger 1. When the coolant heated by the engine exhaust flows to the side of the radiator 2, it is cooled. The cooled liquid flows back into the heat exchanger 1 to continue cooling the engine exhaust, thereby providing effective cooling treatment for the engine exhaust and improving vehicle safety.

[0061] In some possible implementations, the heat exchanger 1 can be connected to the engine's exhaust pipe via a metal bellows, which is used to isolate vibrations generated by the engine in order to improve the vibration damping performance of the exhaust cooling device.

[0062] The foregoing disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0063] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0064] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. An engine exhaust gas cooling device, characterized in that, include: A heat exchanger having a shell and a flue pipe, the shell having a cavity, a flue inlet, a flue outlet, a water inlet, and a water outlet, the flue pipe being disposed in the cavity, the two ends of the flue pipe being connected to the flue inlet and the flue outlet respectively, and the water inlet and the water outlet being connected to the cavity; A radiator having a heat dissipation pipe, the two ends of which are connected to the inlet and outlet via connecting water pipes, and a water pump is installed on the connecting water pipes.

2. The engine exhaust gas cooling device according to claim 1, characterized in that, The heat exchanger includes a plurality of exhaust pipes, each exhaust pipe being disposed within the cavity, and there being a gap between each exhaust pipe; A liquid-containing space is formed between the inner wall of the housing and the outer wall of the exhaust pipe; Both the inlet and outlet are connected to the containment space.

3. The engine exhaust gas cooling device according to claim 1, characterized in that, The shell includes a main cylindrical shell, two end shells, and two end plates; The main shell is provided with the water inlet and the water outlet; The two end plates are respectively disposed at both ends of the main shell and cover the ports at both ends of the main shell. Through holes are provided on the end plates. Each of the exhaust pipes is located inside the main cylinder shell, and both ends are connected to the through holes on the two end plates respectively; The two end shells are respectively disposed at both ends of the main cylinder shell and located on the side of the corresponding end plate away from the main cylinder shell. The two end shells are respectively provided with the smoke inlet and the smoke outlet. The smoke inlet is connected to each through hole on one end plate, and the smoke outlet is connected to each through hole on the other end plate.

4. The engine exhaust gas cooling device according to claim 1, characterized in that, The shell includes a first shell section, a second shell section, and an expansion and deformation section; The water outlet and the flue gas inlet are provided on the first shell section; The water inlet and the smoke outlet are provided on the second shell section; The expansion and deformation segment is located between the first shell segment and the second shell segment, and connects the first shell segment and the second shell segment respectively.

5. The engine exhaust gas cooling device according to claim 1, characterized in that, The radiator includes a housing and a fan; The heat dissipation pipe is disposed inside the housing, and the fan is mounted on the housing; The heat exchanger is located on one side of the housing and near one corner of the housing.

6. The engine exhaust gas cooling device according to claim 5, characterized in that, The heat exchanger and each of the fans are located on the same side of the housing.

7. The engine exhaust gas cooling device according to claim 6, characterized in that, The radiator includes at least two fans, and the fans are arranged sequentially along the length of the heat exchanger.

8. The engine exhaust gas cooling device according to claim 1, characterized in that, Including expansion tank; The expansion tank is located on top of the radiator; The expansion tank is connected to the heat dissipation pipe.

9. The engine exhaust gas cooling device according to any one of claims 1-8, characterized in that, Both the heat exchanger and the radiator are equipped with shock-absorbing mounting brackets for connection and fixation.

10. An engineering vehicle, characterized in that, include: The vehicle body has an exhaust pipe; The engine exhaust cooling device as described in any one of claims 1-9, wherein the heat exchanger and radiator of the engine exhaust cooling device are respectively connected to the vehicle body, and the smoke inlet is connected to the exhaust pipe.

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