Cooling liquid pipeline assembly of exhaust aftertreatment system
By designing a cooling liquid pipeline assembly for exhaust after-treatment system that integrates urea tank heating water pipes and urea nozzle cooling water pipes, the installation space of the coolant pipeline of medium and heavy-duty automobile exhaust after-treatment system is solved, Problems such as heat hazards and unstable urea injection have achieved space saving, easy assembly, avoiding heat hazards and ensuring normal urea injection.
Patent Information
- Application Number
- CN202420484792.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-13
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-03-13
AI Technical Summary
The installation of coolant pipelines in medium and heavy-duty vehicle exhaust after-treatment systems has problems such as large space occupation, difficulty in assembly, thermal hazards and unstable urea injection.
A cooling fluid pipeline assembly for exhaust after-treatment system was designed, and the water pipes for heating and urea nozzles were cooled by integrated urea tanks. The modular design was adopted to reduce the types and quantity of parts, and the pipeline was ensured through color marks and fixed brackets. Proper installation and fixation.
It achieves space saving, easy assembly, avoids thermal hazards and ensures normal injection of urea, improves assembly efficiency and maintenance convenience, and reduces costs and fault repair time.
Smart Images
Figure CN222478792U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of exhaust gas aftertreatment for medium and heavy-duty vehicles, in particular to a cooling liquid pipeline assembly of an exhaust gas aftertreatment system. Background Art
[0002] As the layout of medium and heavy-duty vehicles becomes more and more compact, the requirements for the integration, modularization, lightweight and maintenance convenience of the exhaust aftertreatment system coolant pipeline installation are getting higher and higher, and higher requirements are put forward for the installation of the exhaust aftertreatment system coolant pipeline: First, at present, the urea tank heating and urea nozzle cooling take water and return water from the engine respectively, with four pipelines, long pipelines, and many deformations, occupying the frame space, difficult to assemble, and posing thermal hazards. Second, the urea tank heating water pipe has no error prevention, resulting in the reverse connection of the inlet and return pipes. If the urea tank is heated for a long time, a fault will be reported. Third, the urea tank under the battery box has a small space, and the urea tank heating water pipe is difficult to assemble on the assembly line. Fourth, the urea nozzle temperature is high, and the urea tank freezes in winter, which affects the urea injection and causes emissions to fail to meet the standards.
[0003] To this end, a coolant pipeline assembly for an exhaust gas aftertreatment system is proposed. Utility Model Content
[0004] The utility model aims to solve the problems raised in the background technology and provides a coolant pipeline assembly of an exhaust gas after-treatment system.
[0005] The specific technical solutions are as follows:
[0006] An exhaust gas aftertreatment system coolant pipeline assembly, comprising:
[0007] A warm air water inlet steel pipe and a water inlet main line, one end of the water inlet main line is connected to one end of the warm air water inlet steel pipe, the other end of the water inlet main line is connected to the first port of the water inlet tee, the second port of the water inlet tee is connected to one end of the urea nozzle cooling water inlet pipe, the other end of the urea nozzle cooling water inlet pipe is connected to the urea nozzle of the exhaust after-processor, the urea nozzle is simultaneously connected to one end of the urea nozzle cooling water return pipe, the other end of the urea nozzle cooling water return pipe is connected to the first port of the water return tee, and the second port of the water return tee is connected to one end of the water return main line;
[0008] Port three of the water inlet tee is connected to one end of the urea tank heating water inlet pipe, the other end of the urea tank heating water inlet pipe is connected to one end of the heat exchange pipe located inside the urea tank, the other end of the heat exchange pipe located inside the urea tank is connected to one end of the urea tank heating return pipe, the other end of the urea tank heating return pipe is connected to port three of the return water tee, and the other end of the return water main pipeline is connected to one end of the warm air return water steel pipe.
[0009] As a preferred solution of the utility model, a water inlet interface and a water return interface are fixedly installed on the urea tank, which are respectively connected to the two ends of the heat exchange tube inside the urea tank, and the water inlet interface and the water return interface are different in size. The urea tank heating water inlet pipe is provided with a blue color mark, and the urea tank heating water inlet pipe is connected to the water inlet interface, and the urea tank heating water return pipe is provided with a white color mark, and the urea tank heating water return pipe is connected to the water return interface.
[0010] As a preferred solution of the utility model, the urea nozzle cooling water inlet pipe and the urea tank heating water return pipe are both wrapped with a ceramic fiber insulation layer.
[0011] As a preferred solution of the utility model, the urea nozzle cooling water inlet pipe and the urea nozzle cooling water return pipe are both fixed on the exhaust after-processor through a pipe fixing bracket II.
[0012] As a preferred solution of the utility model, the urea tank heating water inlet pipe and the urea tank heating water return pipe are both fixed on the urea tank through a pipe fixing bracket VI.
[0013] As a preferred solution of the utility model, the water inlet tee and the water return tee are both fixed on the vehicle frame via a pipeline fixing bracket III.
[0014] As a preferred solution of the utility model, the water inlet main line and the water return main line are both fixed on the vehicle frame through a pipe fixing bracket I, a fixing bracket II, a pipe fixing bracket IV, and a pipe fixing bracket V.
[0015] As a preferred solution of the utility model, a urea liquid level sensor is installed on the urea tank.
[0016] The utility model has the following beneficial effects:
[0017] 1. The exhaust aftertreatment system coolant pipeline assembly integrates the urea tank heating water pipe and the urea nozzle cooling water pipe, which not only saves the layout space of the whole vehicle, but also facilitates the modularization of the whole vehicle. It can realize the offline subassembly of the urea tank heating water pipe and the urea tank, and the offline subassembly of the urea nozzle cooling water pipe and the aftertreatment device, saving the production cycle of the general assembly line and improving the assembly efficiency.
[0018] 2. By rationally designing the main coolant pipeline of the exhaust aftertreatment system and merging the inner part of the frame of the urea tank heating water pipe and the urea nozzle cooling water pipe, the types and quantity of parts can be reduced, saving costs. The exhaust aftertreatment system coolant pipeline assembly adopts a modular design. When a pipeline is damaged after sales, only the branch pipeline can be disassembled and replaced according to the damage, rather than replacing the entire pipeline, to reduce material costs. And only the branch pipeline is disassembled and replaced, which is convenient for maintenance, greatly reducing the time required to replace the pipeline and reducing labor costs.
[0019] 3. The inlet pipe of the exhaust after-treatment system coolant pipeline assembly has a blue color mark, and the return pipe has a white color mark, which is used for both pipeline fixing identification and error prevention identification of the inlet and return pipes. The interface sizes of the urea tank heating inlet pipe and the urea tank heating return pipe are different to prevent reverse connection.
[0020] 4. The exhaust after-treatment system coolant pipeline assembly is fixed to the vehicle frame with a fixed bracket, which is convenient and reliable, compact in structure and easy to install.
[0021] 5. The water inlet and return main lines are taken from the warm air steel pipe, away from the heat source of the engine body. The urea nozzle cooling water pipe is equipped with a heat insulation layer, which can reduce the heat radiation effect of the post-processor on the urea nozzle cooling water pipe and avoid heat hazards.
[0022] 6. The coolant pipeline assembly of the exhaust after-treatment system not only heats the nozzle cold area but also heats the urea tank, which can ensure the normal injection of urea and prevent emissions from not meeting standards. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 This is a schematic diagram of the installation of the coolant pipeline assembly of the exhaust gas after-treatment system in the utility model;
[0024] Figure 2 This is a schematic diagram of the installation of the urea tank heating water pipe in the utility model;
[0025] Figure 3 This is a schematic diagram of the installation of the cooling water pipe for the urea nozzle in the utility model.
[0026] In the attached figure:
[0027] 1. Warm air inlet steel pipe; 2. Warm air return steel pipe; 3. Inlet main line; 4. Return main line; 5. Fixed bracket I; 6. Fixed bracket II; 7. Exhaust after-processor; 8. Urea nozzle; 9. Urea nozzle cooling inlet pipe; 10. Urea nozzle cooling return pipe; 11. Pipeline fixed bracket II; 12. Pipeline fixed bracket III; 13. Pipeline fixed bracket IV; 14. Pipeline fixed bracket V; 15. Pipeline fixed bracket VI; 16. Urea tank heating inlet pipe; 17. Urea tank heating return pipe; 18. Urea tank; 19. Urea liquid level sensor; 20. Water inlet tee; 21. Return tee. DETAILED DESCRIPTION
[0028] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.
[0029] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.
[0030] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which 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. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.
[0031] In the description of the present invention, unless otherwise clearly specified and limited, if the term "connection" or the like appears to indicate the connection relationship between components, the term 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 a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0032] Example
[0033] The exhaust gas aftertreatment system coolant pipeline assembly provided in this embodiment is as follows: Figure 1-Figure 3As shown, it includes: a warm air water inlet steel pipe 1 and a water inlet main line 3, one end of the water inlet main line 3 is connected and communicated with one end of the warm air water inlet steel pipe 1 through an SAE quick-plug structure, the other end of the water inlet main line 3 is connected and communicated with the port 1 of the water inlet tee 20 through the SAE quick-plug structure, the port 2 of the water inlet tee 20 is connected and communicated with one end of the urea nozzle cooling water inlet pipe 9 through the SAE quick-plug structure, the other end of the urea nozzle cooling water inlet pipe 9 is connected and communicated with the urea nozzle 8 of the exhaust after-processor 7 through the SAE quick-plug structure, the urea nozzle 8 is also connected and communicated with one end of the urea nozzle cooling water return pipe 10 through the SAE quick-plug structure, the other end of the urea nozzle cooling water return pipe 10 is connected and communicated with the port 1 of the return water tee 21 through the SAE quick-plug structure, and the port 2 of the return water tee 21 is connected and communicated with one end of the return water main line 4 through the SAE quick-plug structure.
[0034] Among them, the third port of the water inlet tee 20 is connected to one end of the urea tank heating water inlet pipe 16 through an NG12 quick-plug structure connection, the other end of the urea tank heating water inlet pipe 16 is connected to one end of the heat exchange tube located inside the urea tank 18, the other end of the heat exchange tube located inside the urea tank 18 is connected to one end of the urea tank heating return water pipe 17, the other end of the urea tank heating return water pipe 17 is connected to the third port of the return water tee 21 through the NG12 quick-plug structure connection, and the other end of the return water main line 4 is connected to one end of the warm air return water steel pipe 2 through the NG12 quick-plug structure connection.
[0035] Specifically, the water inlet main line 3 takes water from the warm air water inlet steel pipe 1, and a part of the cooling water enters the urea nozzle cooling water inlet pipe 9 through the water inlet tee 20. The urea nozzle cooling water inlet pipe 9 is connected to the urea nozzle 8. The cooling water flows through the urea nozzle 8, takes away the heat around the urea nozzle 8, protects the urea nozzle 8, and prevents the urea nozzle 8 from being damaged by overheating. The cooling water passes through the urea nozzle 8 and returns to the urea nozzle cooling water return pipe 10, and then returns to the return water main line 4 through the return water tee 21. Another part of the cooling water enters the urea tank heating water inlet pipe 16 through the water inlet main line 3 to heat the urea tank, which can realize urea thawing and prevent urea from freezing. After the heating is completed, it returns to the return water main line 4 through the urea tank heating water return pipe 17, and merges with the cooling water at the connection point between the return water tee 21 and the urea nozzle cooling water return pipe 10, and returns to the warm air water return steel pipe 2 together.
[0036] Specifically, in the present embodiment, in order to prevent wrong connection, a water inlet interface and a water return interface which are respectively connected to the two ends of the heat exchange tube inside the urea tank 18 are fixedly installed, and the sizes of the water inlet interface and the water return interface are set differently. At the same time, a blue color mark is set on the urea tank heating water inlet pipe 16, and the urea tank heating water inlet pipe 16 is connected to the water inlet interface, and a white color mark is set on the urea tank heating water return pipe 17, and the urea tank heating water return pipe 17 is connected to the water return interface.
[0037] Specifically, in this embodiment, in order to reduce the heat radiation effect of the exhaust afterprocessor 7 on the urea nozzle cooling water inlet pipe 9 and the urea tank heating return pipe 17 and avoid thermal hazards, the urea nozzle cooling water inlet pipe 9 and the urea tank heating return pipe 17 are wrapped with a ceramic fiber insulation layer.
[0038] Specifically, in the present embodiment, for the sake of convenience, reliability, compact structure and easy installation, the urea nozzle cooling water inlet pipe 9 and the urea nozzle cooling water return pipe 10 are fixed to the exhaust after-processor 7 through the pipeline fixing bracket II 11, the urea tank heating water inlet pipe 16 and the urea tank heating water return pipe 17 are fixed to the urea tank 18 through the pipeline fixing bracket VI 15, the water inlet tee 20 and the water return tee 21 are fixed to the frame through the pipeline fixing bracket III 12, and the water inlet main line 3 and the water return main line 4 are fixed to the frame through the pipeline fixing bracket I 5, the fixing bracket II 6, the pipeline fixing bracket IV 13, and the pipeline fixing bracket V 14.
[0039] In order to conveniently and timely understand the urea liquid level in the urea tank 18, a urea liquid level sensor 19 is installed on the urea tank 18, and the signal output end of the urea liquid level sensor 19 is connected to the vehicle computer signal on the vehicle.
[0040] In summary, the exhaust gas aftertreatment system coolant pipeline assembly provided in this embodiment has the following advantages:
[0041] 1. The exhaust aftertreatment system coolant pipeline assembly integrates the urea tank heating water pipe and the urea nozzle cooling water pipe, which not only saves the layout space of the whole vehicle, but also facilitates the modularization of the whole vehicle. It can realize the offline subassembly of the urea tank heating water pipe and the urea tank, and the offline subassembly of the urea nozzle cooling water pipe and the aftertreatment device, saving the production cycle of the general assembly line and improving the assembly efficiency.
[0042] 2. By rationally designing the main coolant pipeline of the exhaust aftertreatment system and merging the inner part of the frame of the urea tank heating water pipe and the urea nozzle cooling water pipe, the types and quantity of parts can be reduced, saving costs. The exhaust aftertreatment system coolant pipeline assembly adopts a modular design. When a pipeline is damaged after sales, only the branch pipeline can be disassembled and replaced according to the damage, rather than replacing the entire pipeline, to reduce material costs. And only the branch pipeline is disassembled and replaced, which is convenient for maintenance, greatly reducing the time required to replace the pipeline and reducing labor costs.
[0043] 3. The inlet pipe of the exhaust after-treatment system coolant pipeline assembly has a blue color mark, and the return pipe has a white color mark, which is used for both pipeline fixing identification and error prevention identification of the inlet and return pipes. The interface sizes of the urea tank heating inlet pipe and the urea tank heating return pipe are different to prevent reverse connection.
[0044] 4. The exhaust after-treatment system coolant pipeline assembly is fixed to the vehicle frame with a fixed bracket, which is convenient and reliable, compact in structure and easy to install.
[0045] 5. The water inlet and return main lines are taken from the warm air steel pipe, away from the heat source of the engine body. The urea nozzle cooling water pipe is equipped with a heat insulation layer, which can reduce the heat radiation effect of the post-processor on the urea nozzle cooling water pipe and avoid heat hazards.
[0046] 6. The coolant pipeline assembly of the exhaust after-treatment system not only heats the nozzle cold area but also heats the urea tank, which can ensure the normal injection of urea and prevent emissions from not meeting standards.
[0047] The above are only preferred embodiments of the present invention, and do not limit the implementation mode and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.
Claims
1. An exhaust gas aftertreatment system coolant pipeline assembly, characterized in that: include: A warm air water inlet steel pipe (1) and a water inlet main line (3), one end of the water inlet main line (3) being connected to one end of the warm air water inlet steel pipe (1), the other end of the water inlet main line (3) being connected to a first opening of a water inlet tee (20), the second opening of the water inlet tee (20) being connected to one end of a urea nozzle cooling water inlet pipe (9), the other end of the urea nozzle cooling water inlet pipe (9) being connected to a urea nozzle (8) of an exhaust after-treatment device (7), the urea nozzle (8) being simultaneously connected to one end of a urea nozzle cooling water return pipe (10), the other end of the urea nozzle cooling water return pipe (10) being connected to a first opening of a water return tee (21), the second opening of the water return tee (21) being connected to one end of the water return main line (4); The third port of the water inlet tee (20) is connected to one end of the urea tank heating water inlet pipe (16), the other end of the urea tank heating water inlet pipe (16) is connected to one end of the heat exchange pipe located inside the urea tank (18), the other end of the heat exchange pipe located inside the urea tank (18) is connected to one end of the urea tank heating water return pipe (17), the other end of the urea tank heating water return pipe (17) is connected to the third port of the water return tee (21), and the other end of the water return main line (4) is connected to one end of the warm air water return steel pipe (2).
2. The exhaust gas aftertreatment system coolant pipeline assembly according to claim 1, characterized in that: The urea tank (18) is fixedly provided with a water inlet interface and a water return interface which are respectively connected to the two ends of the heat exchange tube inside the urea tank, the water inlet interface and the water return interface are of different sizes, the urea tank heating water inlet pipe (16) is provided with a blue color mark, and the urea tank heating water inlet pipe (16) is connected to the water inlet interface, and the urea tank heating water return pipe (17) is provided with a white color mark, and the urea tank heating water return pipe (17) is connected to the water return interface.
3. The exhaust gas aftertreatment system coolant pipeline assembly according to claim 2, characterized in that: The urea nozzle cooling water inlet pipe (9) and the urea tank heating water return pipe (17) are both wrapped with a ceramic fiber insulation layer.
4. The exhaust gas aftertreatment system coolant pipeline assembly according to claim 3, characterized in that: The urea nozzle cooling water inlet pipe (9) and the urea nozzle cooling water return pipe (10) are both fixed on the exhaust after-processor (7) via a pipe fixing bracket II (11).
5. The exhaust gas aftertreatment system coolant pipeline assembly according to claim 4, characterized in that: The urea tank heating water inlet pipe (16) and the urea tank heating water return pipe (17) are both fixed on the urea tank (18) via a pipe fixing bracket VI (15).
6. The exhaust gas aftertreatment system coolant pipeline assembly according to claim 5, characterized in that: The water inlet tee (20) and the water return tee (21) are both fixed on the vehicle frame via a pipeline fixing bracket III (12).
7. The exhaust gas aftertreatment system coolant pipeline assembly according to claim 6, characterized in that: The water inlet main line (3) and the water return main line (4) are both fixed on the vehicle frame via a pipeline fixing bracket I (5), a fixing bracket II (6), a pipeline fixing bracket IV (13), and a pipeline fixing bracket V (14).
8. The exhaust gas aftertreatment system coolant pipeline assembly according to claim 1, characterized in that: A urea liquid level sensor (19) is installed on the urea tank (18).