Large-displacement up-and-down sectional type natural gas post-treatment box type structure

Abstract

The utility model discloses a large-displacement up-and-down sectional type natural gas post-treatment box type structure which comprises a box body, a first end cover and a second end cover, a first square partition plate and a second square partition plate are sequentially arranged in the box body in the length direction, and the inner space of the box body is divided into a first cavity, a second cavity and a third cavity; an arc-shaped partition plate is transversely arranged in the first cavity between the first end cover and the first square partition plate and divides the first cavity into an air inlet cavity and an air outlet cavity; purifier assemblies are installed on the first square partition plate and the second square partition plate. Tail gas enters the gas inlet cavity, then sequentially passes through the through holes of the first square partition plate and the second square partition plate, enters the third cavity, is purified by the purifier assembly and then returns to the gas outlet cavity to be exhausted. Compared with the structural design of the air inlet and outlet pipe of the traditional box-type post-treatment structure, the post-treatment box-type structure has the advantages that the tail gas flowing path is lengthened, the air inlet cavity and the air outlet cavity are larger, the back pressure can be effectively reduced, and the tail gas emission quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile exhaust systems, in particular to a large-displacement upper and lower segmented natural gas post-processing box structure. Background Art

[0002] With the increase in the number of various types of motor vehicles in the world, under the dual pressure of energy and environmental protection, it is urgent to solve the problem of exhaust emissions that are harmful to the environment and human health. Various regulations on exhaust emissions have also become more stringent. In order to meet emission standards, the exhaust after-treatment structure also needs to be continuously optimized and improved.

[0003] In addition to gasoline and diesel, compressed natural gas (CNG) vehicles are now being widely used in passenger and commercial vehicles. Compared to gasoline and diesel, natural gas is a cleaner fuel, offering lower emissions, lower costs, and improved safety. However, due to its combustion characteristics, natural gas has a higher ignition point than gasoline, resulting in relatively high exhaust temperatures. To ensure complete combustion, exhaust gases must be discharged as quickly as possible.

[0004] Traditional box-type post-processing structure such as Figure 1 As shown, exhaust gas enters the intake chamber 20 from the intake port 10, passes through the front end of the purification carrier 30, passes through the carrier, enters the outlet chamber 40, and is discharged into the air through the outlet pipe 50. Due to the small space between the end cover and the diameter of the baffle in the outlet chamber 40 and the small diameter of the outlet pipe 50, the outlet back pressure is high, resulting in insufficient engine energy utilization, reduced power output, and deterioration of exhaust emission quality due to incomplete combustion. Utility Model Content

[0005] The purpose of the utility model is to provide a large-displacement upper and lower segmented natural gas post-processing box structure to solve the problem of excessive outlet back pressure of traditional box-type post-processing structures.

[0006] To solve the above technical problems, the present invention provides a large-displacement upper and lower segmented natural gas post-processing box structure, comprising a box body, a first end cover and a second end cover. A first square partition and a second square partition are sequentially arranged in the box body along the length direction, dividing the internal space of the box body into a first cavity, a second cavity and a third cavity;

[0007] An arc-shaped partition is arranged transversely in the first cavity between the first end cover and the first square partition, dividing the first cavity into an air inlet cavity and an air outlet cavity;

[0008] A purifier assembly is installed on the first partition plate and the second partition plate;

[0009] After entering the air inlet cavity, the exhaust gas passes through the through holes of the first side partition and the second side partition in sequence and enters the third cavity, and then returns to the air outlet cavity for discharge after being purified by the purifier assembly.

[0010] Preferably, one end of the arc-shaped partition is connected to the first end cover, the other end is connected to the first square partition, and both sides are welded and fixed to the box body.

[0011] Preferably, the first end cover is a segmented end cover, comprising an upper end cover and a lower end cover, and the arc-shaped partition is inserted between the upper end cover and the lower end cover and is welded to the two;

[0012] The cavity formed by the upper end cover, the arc-shaped partition, the first square partition and the box body is an air intake cavity;

[0013] The cavity formed by the lower end cover, the arc-shaped partition, the first square partition and the box body is an air outlet cavity.

[0014] Preferably, the arched surface of the arc-shaped partition faces the air inlet cavity.

[0015] Preferably, an arc-shaped groove is provided on the first square partition plate, and the arc-shaped partition plate is inserted into the arc-shaped groove and is welded and fixed to the first square partition plate.

[0016] Preferably, an air inlet end is provided outside the box body, and the air inlet end extends toward the inside of the box body and communicates with the air inlet cavity.

[0017] Preferably, an air outlet is provided on the outer side of the first end cover, and the air outlet extends toward the interior of the box body and is communicated with the air outlet cavity.

[0018] Preferably, a reinforcement tube is provided in the box body, and the reinforcement tube at least crosses the first end cover, the first square partition and the second square partition, and is fixed by welding.

[0019] Preferably, the purifier assembly includes a carrier 1 and a carrier 2, and the carrier 1 and the carrier 2 are arranged in sequence along the flow direction of the exhaust gas.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. This large-displacement, upper and lower segmented natural gas post-processing box structure features curved baffles designed according to the airflow direction, dividing the first cavity into an inlet cavity and an outlet cavity. This increases the volume of the inlet and outlet cavities, improves the utilization rate of the carrier in the purifier assembly, and meets the flow rate uniformity requirements of large-displacement natural gas carriers.

[0022] 2. One side of the arc-shaped partition in the large-displacement upper and lower segmented natural gas post-processing box structure is inserted between the upper end cover and the lower end cover and welded to both; the other side is inserted into the arc-shaped groove and welded to the first side partition, thereby improving structural reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the traditional box-type post-processing structure provided by the utility model;

[0024] Figure 2 This is a schematic diagram of the upper and lower segmented natural gas post-processing box structure provided by the utility model;

[0025] Figure 3 This is a schematic diagram of the interior of the upper and lower segmented natural gas post-processing box structure provided by the utility model;

[0026] Figure 4 This is a schematic diagram of the connection between the arc-shaped partition and the first side partition provided by the utility model;

[0027] Figure 5 It is a structural schematic diagram of the arc-shaped partition provided by the utility model.

[0028] In the figure: 1. Box body; 2. First end cover; 201. Upper end cover; 202. Lower end cover; 3. Second end cover; 4. First side partition; 5. Second side partition; 6. Arc-shaped partition; 7. Air inlet cavity; 8. Air outlet cavity; 9. Purifier assembly; 901. Carrier 1; 902. Carrier 2; 10. Air inlet end; 11. Air outlet end; 12. Reinforcement tube; 20. Air inlet cavity; 30. Purification carrier; 40. Air outlet cavity; 50. Air outlet pipe. DETAILED DESCRIPTION

[0029] The following is a further detailed description of the present invention in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description and claims. It should be noted that the drawings are greatly simplified and not to exact scale, and are intended solely to facilitate and clearly illustrate the embodiments of the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0031] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances. Example

[0032] The utility model provides a large displacement upper and lower segmented natural gas post-processing box structure, please refer to Figure 2 and Figure 3 , comprising a box body 1, a first end cover 2 and a second end cover 3, and is characterized in that a first square partition 4 and a second square partition 5 are sequentially arranged in the box body 1 along the length direction, dividing the internal space of the box body 1 into a first cavity, a second cavity and a third cavity; an arc-shaped partition 6 is horizontally arranged in the first cavity between the first end cover 2 and the first square partition 4, dividing the first cavity into an air inlet cavity 7 and an air outlet cavity 8; a purifier component 9 is installed on the first square partition 4 and the second square partition 5.

[0033] After entering the air inlet cavity 7 , the exhaust gas passes through the through holes of the first side partition 4 and the second side partition 5 in sequence and enters the third cavity. Then, it is purified by the purifier assembly 9 and returns to the air outlet cavity 8 for discharge.

[0034] Specifically, one end of the arc-shaped partition 6 is connected to the first end cover 2 , and the other end is connected to the first square partition 4 , and both sides are welded and fixed to the box body 1 .

[0035] Furthermore, the first end cover 2 is a segmented end cover, including an upper end cover 201 and a lower end cover 202, and the arc-shaped partition 6 is inserted between the upper end cover 201 and the lower end cover 202, and is welded and fixed to both; the cavity formed by the upper end cover 201, the arc-shaped partition 6, the first square partition 4 and the box body 1 is an air inlet cavity 7; the cavity formed by the lower end cover 202, the arc-shaped partition 6, the first square partition 4 and the box body 1 is an air outlet cavity 8.

[0036] In some embodiments, the arched surface of the arc-shaped partition 6 faces the air inlet cavity 7, thereby further increasing the space of the air outlet cavity 8 and reducing the back pressure.

[0037] In some embodiments, see Figure 4 and Figure 5 The first square partition plate 4 is provided with an arc groove, the arc partition plate 6 is inserted into the arc groove, and is welded and fixed to the first square partition plate 4 to improve structural reliability.

[0038] This high-capacity, segmented natural gas post-processing box structure features a curved baffle 6 designed according to the flow direction, dividing the first chamber into an inlet chamber 7 and an outlet chamber 8. This increases the volume of the inlet and outlet chambers 7 and 8, improves the utilization of the carrier in the purifier assembly 9, and meets the flow rate uniformity requirements of large-capacity natural gas carriers.

[0039] For details, please refer to Figure 2 and Figure 3 An air inlet end 10 is provided on the outside of the box body 1, and the air inlet end 10 extends into the inside of the box body 1 and is connected to the air inlet cavity 7; an air outlet end 11 is provided on the outside of the first end cover 2, and the air outlet end 11 extends into the inside of the box body 1 and is connected to the air outlet cavity 8.

[0040] Furthermore, a reinforcement tube 12 is provided in the box body 1. The reinforcement tube 12 at least crosses the first end cover 2, the first square partition 4 and the second square partition 5, and is fixed by welding to improve structural reliability.

[0041] Furthermore, the purifier assembly 9 includes a carrier 1 901 and a carrier 2 902, and the carrier 1 901 and the carrier 2 902 are arranged in sequence along the flow direction of the exhaust gas. In this embodiment, the carrier 1 901 is installed toward the second square partition 5, and the carrier 2 902 is installed toward the first square partition 4, and the carrier 2 902 is connected to the gas outlet cavity 8. The exhaust gas is introduced into the gas outlet cavity 8 after being processed by the carrier 1 901 and the carrier 2 902.

[0042] Compared with the traditional box-type after-treatment structure with final inlet and outlet pipe structure design, the utility model lengthens the exhaust gas flow path, and the air inlet cavity and the air outlet cavity are relatively large, which can effectively reduce the back pressure and improve the exhaust emission quality.

[0043] The above description is only a description of the preferred embodiment of the present invention and does not limit the scope of the present invention. Any changes and modifications made by ordinary technicians in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A large-displacement upper and lower segmented natural gas post-processing box structure, comprising a box body (1), a first end cover (2) and a second end cover (3), characterized in that: A first square partition (4) and a second square partition (5) are sequentially arranged in the longitudinal direction of the box (1), dividing the internal space of the box (1) into a first cavity, a second cavity, and a third cavity; An arc-shaped partition (6) is arranged transversely in the first cavity between the first end cover (2) and the first square partition (4), dividing the first cavity into an air inlet cavity (7) and an air outlet cavity (8); A purifier assembly (9) is installed on the first side partition (4) and the second side partition (5); After entering the air inlet cavity (7), the exhaust gas passes through the through holes of the first side partition (4) and the second side partition (5) in sequence and enters the third cavity. After being purified by the purifier assembly (9), the exhaust gas returns to the air outlet cavity (8) and is discharged.

2. A large-displacement upper and lower segmented natural gas post-processing box structure as claimed in claim 1, characterized in that: One end of the arc-shaped partition (6) is connected to the first end cover (2), the other end is connected to the first square partition (4), and both sides are welded and fixed to the box body (1).

3. A large-displacement upper and lower segmented natural gas post-processing box structure as claimed in claim 2, characterized in that: The first end cover (2) is a segmented end cover, comprising an upper end cover (201) and a lower end cover (202), and the arc-shaped partition (6) is inserted between the upper end cover (201) and the lower end cover (202), and is welded to the two. The cavity formed by the upper end cover (201), the arc-shaped partition (6), the first square partition (4) and the box body (1) is an air intake cavity (7); The cavity formed by the lower end cover (202), the arc-shaped partition (6), the first square partition (4) and the box body (1) is an air outlet cavity (8).

4. A large-displacement upper and lower segmented natural gas post-processing box structure as claimed in claim 2, characterized in that: The arched surface of the arc-shaped partition (6) faces the air inlet cavity (7).

5. The large-displacement upper and lower segmented natural gas post-processing box structure according to claim 2, characterized in that: An arc-shaped groove is provided on the first side partition (4), and the arc-shaped partition (6) is inserted into the arc-shaped groove and fixed to the first side partition (4) by welding.

6. The large-displacement upper and lower segmented natural gas post-processing box structure according to claim 3, characterized in that: An air inlet end (10) is provided outside the box body (1), and the air inlet end (10) extends toward the inside of the box body (1) and is in communication with the air inlet cavity (7).

7. The large-displacement upper and lower segmented natural gas post-processing box structure according to claim 3, characterized in that: An air outlet (11) is provided on the outside of the first end cover (2), and the air outlet (11) extends into the interior of the box body (1) and is in communication with the air outlet cavity (8).

8. The large-displacement upper and lower segmented natural gas post-processing box structure according to claim 1, characterized in that: A reinforcement tube (12) is provided in the box body (1), and the reinforcement tube (12) at least crosses the first end cover (2), the first square partition (4) and the second square partition (5), and is fixed by welding.

9. The large-displacement upper and lower segmented natural gas post-processing box structure according to claim 1, characterized in that: The purifier assembly (9) comprises a carrier 1 (901) and a carrier 2 (902), wherein the carrier 1 (901) and the carrier 2 (902) are arranged in sequence along the flow direction of the exhaust gas.

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