A diesel engine exhaust particulate coarse filter device

Abstract

The present invention relates to the field of exhaust gas treatment. The purpose is to provide a diesel engine exhaust particulate coarse filter device that can effectively remove large particle impurities and reduce the risk of clogging, including an air cylinder, one end of the air cylinder is an exhaust end, and the other end is an intake end, the exhaust end of the air cylinder is connected to the DOC device, and a filter cartridge is provided in the air cylinder; the gas enters from the intake end of the air cylinder, passes through the filter cartridge and is blown out from the exhaust end; the air cylinder is composed of a head section close to the intake end and a tail section close to the exhaust end, and an air guide is coaxially provided on the periphery of the air cylinder, and the positions of the air guide near the two ends are respectively connected to the head section and the tail section of the air cylinder through two groups of supporting short rods. The present invention can continuously clean the large particle impurities on the filter cartridge during operation, prevent the large particle impurities from excessively clogging the filter cartridge, reduce the risk of clogging, and effectively remove large particle impurities in the exhaust gas.

Description

Technical Field

[0001] The present invention relates to the field of exhaust gas treatment, and in particular to a diesel engine exhaust gas particle coarse filtering device. Background Art

[0002] Diesel engine exhaust treatment efforts both domestically and internationally focus on three key areas: pre-engine treatment; in-engine purification; and post-treatment research and development. For a long time, the uneven quality of domestic diesel fuel and limited modifications to engine structures and components have made it difficult to meet increasingly stringent emission standards. Furthermore, the wide variation in vehicle conditions and original emissions makes it difficult to retrofit exhaust purification technologies within the engine itself. Therefore, in-use diesel engine exhaust after-treatment technology is particularly important. Currently, the primary approach to exhaust after-treatment involves adding a standalone exhaust purifier to the exhaust system. Its primary structure consists of a Diesel Oxidation Catalyst (DOC) coupled to a Diesel Particulate Filter (DPF). This approach achieves a particle capture accuracy exceeding 90% and offers excellent catalytic oxidation of gaseous pollutants. However, large-displacement diesel engines, due to the large diameter of the particles removed and incomplete combustion, produce high oil content in the exhaust, which can easily lead to clogging of the DOC and DPF carriers. This will cause the exhaust back pressure to increase, the purification efficiency of the purifier to drop seriously, and may even cause damage to the engine.

[0003] To this end, in the existing technology, the exhaust gas needs to be preliminarily filtered before entering the DOC and DPF for treatment. In the process of preliminarily filtering the exhaust gas, the simplest way is to use a filter screen and a filter cartridge. However, if the filter screen and the filter cartridge are not cleaned during long-term use, the filter holes on them will be completely pressed into the filter holes under long-term high exhaust pressure, causing serious blockage and affecting normal use. Summary of the Invention

[0004] The object of the present invention is to provide a diesel engine exhaust particulate coarse filter device that can effectively remove large particle impurities and reduce the risk of clogging.

[0005] To achieve the above-mentioned object, the technical solution adopted by the present invention is as follows: a diesel engine exhaust particulate coarse filter device, comprising an air cylinder, one end of which is an exhaust end and the other end is an intake end, the exhaust end of the air cylinder is connected to the DOC device, and a filter cartridge is provided in the air cylinder; gas enters from the intake end of the air cylinder, passes through the filter cartridge, and is blown out from the exhaust end;

[0006] The air cylinder is composed of a head section close to the air inlet end and a tail section close to the exhaust end. An air guide cylinder is coaxially arranged on the periphery of the air cylinder. The positions of the air guide cylinder close to the two ends are respectively connected to the head section and the tail section of the air cylinder through two groups of supporting short rods; a rotating cylinder is also bridged between the head section and the tail section of the air cylinder, and the two ends of the rotating cylinder are respectively sleeved on the head section and the tail section of the air cylinder, and are rotatably connected to the head section and the tail section of the air cylinder through bearings; a plurality of driving fan blades are evenly arranged on the outer surface of the rotating cylinder, and a cleaning component for cleaning the outer surface of the filter cylinder is provided on the inner surface of the rotating cylinder.

[0007] Preferably, the cleaning component is a cleaning brush, which includes a brush holder fixedly arranged on the inner surface of the rotating cylinder, and a side of the brush holder facing the filter cylinder is provided with a plurality of cleaning bristles extending to the outer surface of the filter cylinder.

[0008] Preferably, at least two cleaning brushes are provided, and the cleaning brushes are evenly distributed in a ring shape around the center of the rotating cylinder.

[0009] Preferably, the end of the air guide tube close to the air inlet end of the air cylinder is trumpet-shaped.

[0010] Preferably, the air inlet end of the cylinder is provided with a flange for communicating with the exhaust passage of the diesel engine.

[0011] Preferably, the exhaust end of the gas cylinder is flange-connected to the DOC device.

[0012] Preferably, the filter cartridge is coaxially mounted at the center of the air cylinder via a ring frame, and the ring frame is fixedly connected to the air cylinder via a connecting rod.

[0013] The beneficial effects of the present invention are concentrated in: being able to continuously clean the large particles of impurities on the filter cartridge during operation, preventing the large particles of impurities from excessively clogging the filter cartridge, reducing the risk of clogging, and being able to effectively remove large particles of impurities in the exhaust gas. Specifically, during use, the present invention connects the air intake and exhaust ends of the cylinder to the exhaust channel and the DOC device respectively. When the diesel engine is working, the large particles in the exhaust gas are trapped on the outer surface of the filter cartridge after passing through the filter cartridge because the vehicle is in motion. In the process of flowing through the air guide tube, the air flow drives the fan blades to move, and then drives the rotating drum to rotate. In the process of rotating the rotating drum, it drives the cleaning component to clean the outer surface of the filter cartridge. Compared with the traditional method, the present invention can continuously clean the filter cartridge with the help of wind power during normal use, prevent the filter cartridge from being blocked, and reduce the risk of clogging. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention. DETAILED DESCRIPTION

[0015] like Figure 1As shown, a diesel engine exhaust particulate coarse filter device includes an air cylinder 1, one end of the air cylinder 1 is an exhaust end, and the other end is an intake end. The exhaust end of the air cylinder 1 is connected to the DOC device 2. A filter cartridge is provided in the air cylinder 1. Usually, the filter cartridge is coaxially mounted in the center of the air cylinder 1 through a ring frame 12. The ring frame 12 is fixed to the air cylinder 1 through a connecting rod 13. Figure 1 As shown in the figure, the filter cartridge is conical in shape; in practice, the filter cartridge can also be a stepped cylindrical, cylindrical, or other shape. Gas enters the inlet end of the cylinder 1, passes through the filter cartridge, and is blown out of the exhaust end. To connect to the vehicle's exhaust duct, the inlet end of the cylinder 1 is provided with a flange for communication with the diesel engine's exhaust duct. Similarly, the exhaust end of the cylinder 1 is generally also flange-connected to the DOC device 2.

[0016] The air cylinder 1 is composed of a head section 3 close to the air inlet end and a tail section 4 close to the exhaust end. An air guide tube 5 is coaxially arranged on the periphery of the air cylinder 1. The air guide tube 5 is connected to the head section 3 and the tail section 4 of the air cylinder 1 respectively through two groups of supporting short rods 6 near the two ends. In fact, the bridging of the head section 3 and the tail section 4 of the air cylinder 1 is achieved through the air guide tube 5 and the supporting short rods 6.

[0017] A rotating cylinder 7 is also connected across the head section 3 and tail section 4 of the air cylinder 1. The two ends of the rotating cylinder 7 are respectively mounted on the head section 3 and tail section 4 of the air cylinder 1 and are rotatably connected to the head section 3 and tail section 4 of the air cylinder 1 through bearings 8. When the head section 3, tail section 4, air guide tube 5 and the like of the air cylinder 1 are fixed, the rotating cylinder 7 can rotate. In order to drive the rotating cylinder 7 to rotate, a plurality of driving blades 9 are evenly arranged on the outer surface of the rotating cylinder 7. A cleaning component for cleaning the outer surface of the filter cylinder is arranged on the inner surface of the rotating cylinder 7. The cleaning component is used to remove large particles from the outer surface of the filter cylinder. It can be a scraper or a cleaning brush. The cleaning brush includes a brush holder 10 fixedly arranged on the inner surface of the rotating cylinder 7. The side of the brush holder 10 facing the filter cylinder is provided with a plurality of cleaning bristles 11 extending to the outer surface of the filter cylinder. In order to further improve the cleaning effect, at least two cleaning brushes are provided, and the cleaning brushes are evenly distributed in a ring shape around the center of the rotating cylinder 7.

[0018] During use of the present invention, the air intake end and the exhaust end of the air cylinder 1 are connected to the exhaust channel and the DOC device 2 respectively. When the diesel engine is working, the large particles in the exhaust gas are trapped on the outer surface of the filter cylinder after passing through the filter cylinder, because the vehicle is in motion. In the process of the air flow flowing through the air guide cylinder 5, the driving blades 9 are driven to move, and then the rotating cylinder 7 is driven to rotate. In the process of the rotating cylinder 7 rotating, the cleaning component is driven to clean the outer surface of the filter cylinder. Compared with the traditional method, the present invention can continuously clean the filter cylinder with the help of wind power during normal use, prevent the filter cylinder from being blocked, and reduce the risk of blockage. In order to increase the air intake of the air guide cylinder 5, the end of the air guide cylinder 5 close to the air intake end of the air cylinder 1 is trumpet-shaped.

Claims

1. A diesel engine exhaust particulate coarse filter device, characterized by: The gas cylinder (1) comprises an exhaust end at one end and an intake end at the other end, the exhaust end of the gas cylinder (1) being connected to a DOC device (2), and a filter cartridge being provided inside the gas cylinder (1); gas enters from the intake end of the gas cylinder (1), passes through the filter cartridge, and is blown out from the exhaust end; The air cylinder (1) is composed of a head section (3) close to the air inlet end and a tail section (4) close to the air outlet end. An air guide cylinder (5) is coaxially arranged on the periphery of the air cylinder (1). The positions of the air guide cylinder (5) close to the two ends are respectively connected to the head section (3) and the tail section (4) of the air cylinder (1) through two groups of supporting short rods (6); a rotating cylinder (7) is also bridged between the head section (3) and the tail section (4) of the air cylinder (1), and the two ends of the rotating cylinder (7) are respectively sleeved on the head section (3) and the tail section (4) of the air cylinder (1), and are rotatably connected to the head section (3) and the tail section (4) of the air cylinder (1) through bearings (8); the outer surface of the rotating cylinder (7) is evenly provided with a plurality of driving blades (9), and the inner surface of the rotating cylinder (7) is provided with a cleaning component for cleaning the outer surface of the filter cylinder.

2. The diesel engine exhaust particulate coarse filter device according to claim 1, characterized in that: The cleaning assembly is a cleaning brush, which includes a brush holder (10) fixedly arranged on the inner surface of the rotating cylinder (7), and a plurality of cleaning bristles (11) extending to the outer surface of the filter cylinder are provided on the side of the brush holder (10) facing the filter cylinder.

3. The diesel engine exhaust particulate coarse filter device according to claim 2, characterized in that: At least two cleaning brushes are provided, and the cleaning brushes are evenly distributed in a ring shape around the center of the rotating cylinder (7).

4. The diesel engine exhaust particulate coarse filter device according to claim 3, characterized in that: The end of the air guide tube (5) close to the air inlet end of the air cylinder (1) is trumpet-shaped.

5. The diesel engine exhaust particulate coarse filter device according to claim 4, characterized in that: The air inlet end of the air cylinder (1) is provided with a flange for communicating with the exhaust passage of the diesel engine.

6. The diesel engine exhaust particulate coarse filter device according to claim 5, characterized in that: The exhaust end of the gas cylinder (1) is flange-connected to the DOC device (2).

7. The diesel engine exhaust particulate coarse filter device according to claim 6, characterized in that: The filter cartridge is coaxially mounted at the center of the gas cylinder (1) via a ring frame (12), and the ring frame (12) is fixedly connected to the gas cylinder (1) via a connecting rod (13).

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