Tail gas treatment mechanism of diesel engine

Abstract

The utility model discloses a tail gas treatment mechanism of a diesel engine, which belongs to the technical field of diesel engines, solves the problem that a three-way catalyst is inconvenient to treat tail gas when the temperature of the tail gas of the existing diesel engine is low, and comprises an exhaust pipeline communicated with a tail gas exhaust port of the diesel engine, and the output end of the exhaust pipeline is communicated with the catalyst. A filter shell is fixedly mounted on the catalytic converter, a first assembly shell is slidably connected to the interior of the filter shell, a ceramic filter is arranged in the first assembly shell, and a second assembly shell is slidably connected to the interior of the filter shell. Tail gas is conveyed to the catalyst for preliminary filtering treatment and enters the filter shell through the catalyst, particulate matter in the tail gas is filtered through the ceramic filter, harmful gas in the tail gas is filtered through the adsorbent, secondary treatment is conducted on the tail gas, and harmful substances in the tail gas can be filtered.

Description

Technical Field

[0001] The utility model belongs to the technical field of diesel engines, and in particular relates to an exhaust gas treatment mechanism of a diesel engine. Background Art

[0002] Diesel engines are mainly used in the automotive field to provide power for large trucks or other small cars. During use, diesel engines will produce exhaust gas. The diesel engine sends the exhaust gas to the three-way catalytic converter through the exhaust pipe and processes the exhaust gas through the three-way catalytic converter.

[0003] Existing diesel engines have certain defects in treating exhaust gas. The three-way catalytic converter converts the high-temperature exhaust gas generated by the diesel engine into harmless substances through an oxidation-reduction reaction. When the exhaust gas temperature generated by the diesel engine does not reach the operating temperature of the three-way catalytic converter, the efficiency of exhaust gas treatment will be reduced. The existing utility model patent CN214304012U is a diesel engine exhaust after-treatment device and vehicle that uses a first oxidation catalyst and a second oxidation catalyst (i.e., a three-way catalytic converter) to treat exhaust gas. However, in actual operation, when the car travels a short distance or travels at a slow speed, the overall operating power of the engine is insufficient to allow the fuel to be fully burned, resulting in a low exhaust gas temperature. At this time, the above-mentioned diesel engine exhaust after-treatment device and vehicle cannot effectively treat the exhaust gas. In response to the above-mentioned problem, the present utility model proposes a double-filtration diesel engine exhaust treatment mechanism. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract and title of the utility model to avoid obscuring the purpose of this section, the abstract and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions.

[0006] A diesel engine exhaust treatment mechanism includes: an exhaust pipe connected to the diesel engine exhaust outlet, an exhaust pipe output end connected to a catalyst, a filter shell fixedly mounted on the catalyst, a first assembly shell slidably connected to the interior of the filter shell, a ceramic filter provided inside the first assembly shell, a second assembly shell slidably connected to the interior of the filter shell, and the second assembly shell is located above the first assembly shell.

[0007] As a preferred technical solution of the exhaust gas treatment mechanism of a diesel engine of the present invention, the first assembly shell is composed of an assembly shell and an annular block. The assembly shell is slidably installed inside the filter shell, and the annular block is fixedly installed inside the assembly shell.

[0008] As an optimal technical solution for the exhaust gas treatment mechanism of a diesel engine of the utility model, an extrusion plate is slidingly provided inside the second assembly shell, the second assembly shell is fixedly connected to a rotating table, the rotating table is rotatably connected to the first screw rod, the first screw rod is meshed with the extrusion plate, and the top of the first screw rod is fixedly connected to the turntable.

[0009] As a preferred technical solution of an exhaust gas treatment mechanism of a diesel engine of the present invention, a plurality of limiting rods are fixedly connected to the interior of the second assembly shell, and the limiting rods are slidably connected to the extrusion plate.

[0010] As an optimal technical solution for an exhaust gas treatment mechanism of a diesel engine of the utility model, two groups of clamping blocks are provided on the outside of the filter shell, one group of clamping blocks is fixedly installed on the first assembly shell, and the other group of clamping blocks is fixedly installed on the second assembly shell. A connecting seat is symmetrically fixedly connected to the filter shell, the clamping blocks are slidably connected to the connecting seat, the connecting seat is slidably connected to the sliding block, the connecting seat is rotatably connected to the second screw rod inside, and the second screw rod is engaged with the sliding block.

[0011] As a preferred technical solution of the exhaust gas treatment mechanism of a diesel engine of the present invention, anti-skid drive rods are symmetrically provided on both sides of the filter housing, and both ends of the anti-skid drive rods are connected to the second screw rod.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] (1) In the present invention, by installing a filter shell, a first assembly shell, a ceramic filter and a second assembly shell, when the exhaust gas temperature is low, the exhaust gas is transported to the catalyst for preliminary filtration treatment, passes through the catalyst and enters the interior of the filter shell, the ceramic filter is used to filter particulate matter in the exhaust gas, and the adsorbent is used to filter harmful gases in the exhaust gas, so that the exhaust gas is subjected to secondary treatment and can filter and treat harmful substances in the exhaust gas.

[0014] (2) In the present invention, the first screw is rotated to control the extrusion plate to move downward, thereby squeezing the adsorbent placed inside the second assembly shell to prevent the exhaust gas from shaking when passing through the second assembly shell. The first screw is rotated in the opposite direction to control the extrusion plate to move upward, thereby facilitating the addition and replacement of the adsorbent inside the second assembly shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the catalyst and filter housing structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of the filter housing of the present invention;

[0018] Figure 4 This is a schematic diagram of the first assembly shell structure of the utility model;

[0019] Figure 5 This is a schematic diagram of the second assembly shell structure at one angle of the present invention;

[0020] Figure 6 This is a schematic diagram of the second assembly shell structure from another angle of the present invention;

[0021] Figure 7 This is a schematic diagram of the positions of the clamping block and the connecting seat of the utility model;

[0022] Figure 8 It is a cross-sectional schematic diagram of the connecting seat of the present invention.

[0023] The corresponding relationship between the illustration labels and component names in the figure is as follows:

[0024] 1. Exhaust duct; 2. Catalyst; 3. Filter housing; 4. First assembly housing; 5. Ceramic filter; 6. Second assembly housing; 7. Extrusion plate; 8. Turntable; 9. First screw; 10. Turntable; 11. Limit rod; 12. Clamping block; 13. Connecting seat; 14. Sliding block; 15. Second screw; 16. Anti-slip drive rod. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments. The present invention provides the following embodiments.

[0028] As attached Figure 1 , Attachment Figure 2 and attached Figure 3As shown, it is a schematic structural diagram of the exhaust gas treatment mechanism of the diesel engine in this embodiment. The exhaust gas treatment mechanism of the diesel engine in this embodiment includes: an exhaust pipe 1 connected to the exhaust outlet of the diesel engine, the output end of the exhaust pipe 1 is connected to the catalyst 2, a filter shell 3 is fixedly mounted on the catalyst 2, the filter shell 3 is slidably connected to the first assembly shell 4, the first assembly shell 4 is provided with a ceramic filter 5, the filter shell 3 is slidably connected to the second assembly shell 6, and the second assembly shell 6 is located above the first assembly shell 4.

[0029] In this embodiment, exhaust gas is generated during the operation of the diesel engine. The exhaust gas is sent to the catalyst 2 through the exhaust pipe 1 for oxidation-reduction reaction to remove harmful substances. When the temperature of the exhaust gas discharged by the diesel engine is high, the catalyst 2 can be used to treat the exhaust gas. The catalyst 2 performs preliminary treatment on the exhaust gas, and the ceramic filter 5 is placed in the first assembly shell 4, and the adsorbent is placed in the second assembly shell 6. The first assembly shell 4 and the second assembly shell 6 are slid into the filter shell 3 and fit tightly. When the temperature of the exhaust gas discharged by the diesel engine is low, the exhaust gas passes through the catalyst 2 and enters the filter shell 3. The particulate matter is filtered by the ceramic filter 5 in the first assembly shell 4, and the harmful gases are filtered by the adsorbent in the second assembly shell 6. The exhaust gas is subjected to secondary treatment, and the first assembly shell 4 and the second assembly shell 6 are pulled out from the filter shell 3 to facilitate the replacement of the ceramic filter 5 and the adsorbent.

[0030] As attached Figure 4 As shown, the first assembly shell 4 is composed of an assembly shell and a circular ring block. The assembly shell is slidably installed inside the filter shell 3, and the circular ring block is fixedly installed inside the assembly shell.

[0031] In this embodiment, the ceramic filter 5 is placed inside the first assembly shell 4, and the ceramic filter 5 enters the assembly shell. The circular ring limits the ceramic filter 5 to prevent the ceramic filter 5 from falling from the bottom end of the first assembly shell 4 when the first assembly shell 4 is moved out from the filter shell 3.

[0032] As attached Figure 5 and attached Figure 6 As shown, an extrusion plate 7 is slidingly provided inside the second assembly shell 6, and a rotating table 8 is fixedly connected to the second assembly shell 6. The rotating table 8 is rotatably connected to the first screw rod 9, the first screw rod 9 is engaged with the extrusion plate 7, and the top of the first screw rod 9 is fixedly connected to the turntable 10.

[0033] In this embodiment, the adsorbent is placed inside the second assembly shell 6, the turntable 10 drives the first screw 9 to rotate, and the extrusion plate 7 moves downward to squeeze the adsorbent to prevent the adsorbent inside the second assembly shell 6 from shaking due to the impact of exhaust gas when the adsorbent filters harmful gases, thereby improving the stability of the placement of the adsorbent. The turntable 10 is rotated in the opposite direction to control the extrusion plate 7 to move upward, which is convenient for replacing and adding adsorbent.

[0034] As attached Figure 5 and attached Figure 6 As shown, a plurality of limiting rods 11 are fixedly connected to the interior of the second assembly shell 6 , and the limiting rods 11 are slidably connected to the extrusion plate 7 .

[0035] In this embodiment, when the extrusion plate 7 moves up and down, the extrusion plate 7 slides up and down along the axial direction of the limiting rod 11, guiding and limiting the extrusion plate 7, and at the same time preventing the extrusion plate 7 from separating from the limiting rod 11 when moving horizontally up and down.

[0036] As attached Figure 7 and attached Figure 8 As shown, two groups of clamping blocks 12 are provided on the outside of the filter housing 3, one group of clamping blocks 12 is fixedly mounted on the first assembly housing 4, and the other group of clamping blocks 12 is fixedly mounted on the second assembly housing 6. A connecting seat 13 is symmetrically fixedly connected to the filter housing 3, and the clamping blocks 12 are slidably connected to the connecting seat 13. The connecting seat 13 is internally slidably connected to the sliding block 14, and the connecting seat 13 is internally rotatably connected to the second screw rod 15, and the second screw rod 15 is engaged with the sliding block 14.

[0037] In this embodiment, the first assembly shell 4 and the second assembly shell 6 are placed close to the filter shell 3, the clamping block 12 enters the interior of the connecting seat 13, the second screw rod 15 is rotated, and the sliding block 14 is controlled to enter the interior of the clamping block 12, so that the first assembly shell 4 and the second assembly shell 6 are firmly connected to the filter shell 3, and the second screw rod 15 is rotated in the opposite direction to facilitate the separation of the clamping block 12 and the connecting seat 13, and the first assembly shell 4 and the second assembly shell 6 are moved out of the filter shell 3, and the ceramic filter 5 and the adsorbent are cleaned and replaced.

[0038] As attached Figure 8 As shown, anti-skid driving rods 16 are symmetrically provided on both sides of the filter housing 3 , and both ends of the anti-skid driving rods 16 are connected to the second screw rod 15 .

[0039] In this embodiment, the anti-slip driving rod 16 is rotated to drive the second screw rods 15 at both ends to rotate, and the sliding block 14 is controlled to enter or move out of the clamping block 12, which can drive the two second screw rods 15 to rotate at the same time.

[0040] The above content is a further detailed description of the present invention in combination with specific implementation methods. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, they can make several simple deductions or substitutions without departing from the concept of the present invention, which should be regarded as falling within the scope of protection determined by the claims submitted for the present invention.

Claims

1. A diesel engine exhaust gas treatment mechanism, comprising an exhaust pipe (1) connected to an exhaust gas outlet of the diesel engine, characterized in that: The output end of the exhaust pipe (1) is connected to a catalyst (2), a filter shell (3) is fixedly mounted on the catalyst (2), the filter shell (3) is internally slidably connected to a first assembly shell (4), a ceramic filter (5) is provided inside the first assembly shell (4), the filter shell (3) is internally slidably connected to a second assembly shell (6), and the second assembly shell (6) is located above the first assembly shell (4).

2. The exhaust gas treatment mechanism of a diesel engine according to claim 1, characterized in that: The first assembly shell (4) consists of an assembly shell and a circular ring block. The assembly shell is slidably mounted inside the filter shell (3), and the circular ring block is fixedly mounted inside the assembly shell.

3. The exhaust gas treatment mechanism of a diesel engine according to claim 1, characterized in that: An extrusion plate (7) is slidably provided inside the second assembly shell (6), a rotating platform (8) is fixedly connected to the second assembly shell (6), a first screw rod (9) is rotatably connected to the rotating platform (8), the first screw rod (9) is meshed and connected to the extrusion plate (7), and the top of the first screw rod (9) is fixedly connected to the turntable (10).

4. The exhaust gas treatment mechanism of a diesel engine according to claim 3, characterized in that: A plurality of limiting rods (11) are fixedly connected inside the second assembly shell (6), and the limiting rods (11) are slidably connected to the extrusion plate (7).

5. The exhaust gas treatment mechanism of a diesel engine according to claim 1, characterized in that: The filter housing (3) is provided with two groups of clamping blocks (12) on the outside, one group of clamping blocks (12) is fixedly mounted on the first assembly housing (4), and the other group of clamping blocks (12) is fixedly mounted on the second assembly housing (6). A connecting seat (13) is symmetrically fixedly connected to the filter housing (3), the clamping blocks (12) are slidably connected to the connecting seat (13), the connecting seat (13) is internally slidably connected to a sliding block (14), the connecting seat (13) is internally rotatably connected to a second screw rod (15), and the second screw rod (15) is meshedly connected to the sliding block (14).

6. The exhaust gas treatment mechanism of a diesel engine according to claim 5, characterized in that: Anti-slip driving rods (16) are symmetrically provided on both sides of the filter housing (3), and both ends of the anti-slip driving rods (16) are connected to the second screw rod (15).

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