Diesel engine on-line back-blowing regeneration purifying device

Abstract

The utility model discloses a diesel engine on -line blowback regeneration purification device mainly includes the purification jar, DPF filter core, blowback mechanism and valve control mechanism, and the DPF filter core is equipped in the purification jar for trapping particulate matter, and one end is connected to the air inlet pipe, and the other end is equipped with the exhaust pipe, and the blowback mechanism contains the fan blade of motor drive, and can produce the sustained airflow to the DPF filter core and gently blowback, need not compressed air system, simple structure and be favorable to prolonging filter core life, and the valve control mechanism is through the mechanical interlock design linkage control air inlet pipe and the valve of miscellaneous pipe, ensure that the opening and closing state of two valves is always opposite, realize the reliable switching of filter and blowback mode, when blowback, particulate matter is discharged through the miscellaneous pipe, realizes on -line regeneration, adopts worm gear self -locking structure, and the working state is stable, only needs single motor drive, and the system cost is low, and the reliability is high.

Description

Technical Field

[0001] This utility model relates to the technical field of exhaust gas purification devices, specifically a diesel engine online backflushing regeneration purification device. Background Technology

[0002] Diesel engines emit exhaust gases containing large amounts of particulate matter (PM) during operation, which poses serious threats to the environment and human health. To meet increasingly stringent emission regulations, diesel particulate filters (DPFs) are widely used in diesel engine exhaust aftertreatment systems to capture and remove particulate matter from exhaust gases.

[0003] Currently, after a period of operation, common DPF systems accumulate a large amount of particulate matter on the filter surface, leading to increased exhaust back pressure and affecting engine performance and fuel economy. Therefore, regular cleaning or regeneration of the DPF filter is essential. Existing technologies often employ high-temperature combustion regeneration to remove particulate matter, but this method suffers from difficulties in temperature control, potential filter damage, and high energy consumption. Alternatively, compressed air pulse backflushing can be used for cleaning, but the strong impact of the pulse airflow can cause structural damage, especially to ceramic DPF filters, shortening their lifespan. Furthermore, pulse backflushing systems typically require complex compressed air equipment and control systems, resulting in high costs and reliability risks. Utility Model Content

[0004] In view of the above-mentioned shortcomings in the existing technology, the purpose of this utility model is to provide a backflushing regeneration purification device with simple structure, gentle backflushing, no need for external air source, and effective extension of DPF filter life.

[0005] The technical solution adopted by this utility model to achieve the above-mentioned objective is as follows: an online backflushing regeneration purification device for diesel engines, comprising a purification tank, a DPF filter element, a backflushing mechanism, and a valve control mechanism. The DPF filter element is fixedly connected inside the purification tank. An intake pipe is fixedly connected to one end of the purification tank, and an exhaust pipe is fixedly connected to the other end. The backflushing mechanism is provided inside the purification tank between the DPF filter element and the exhaust pipe. A waste discharge pipe is fixedly connected to the purification tank between the DPF filter element and the intake pipe. A valve A is provided on the intake pipe, and a valve B is provided on the waste discharge pipe. The valve control mechanism is used in conjunction with valve A and valve B. When valve A opens the exhaust pipe, valve B closes the waste discharge pipe; when valve A closes the exhaust pipe, valve B opens the waste discharge pipe.

[0006] In the above technical solution, the backflush mechanism adopts the following structure: The backflushing mechanism includes a mounting frame, fan blades, and motor A. The mounting frame is fixedly connected inside the purification tank, and the fan blades are rotatably connected to the mounting frame. The motor A is fixedly connected to the outside of the purification tank, and the motor A is poweredly connected to the fan blades.

[0007] Furthermore, to achieve the power connection between motor A and the fan blades, the following structure is adopted: A shaft is fixedly connected to the fan blade, and the shaft is rotatably connected to the mounting frame. A bevel gear A is fixedly connected to the shaft, and an input shaft is rotatably connected to the mounting frame. A bevel gear B is fixedly connected to one end of the input shaft. The bevel gear A and the bevel gear B are meshed together. The top end of the input shaft extends out of the purification tank, and the motor is poweredly connected to the input shaft.

[0008] In the above technical solution, the structures of valve A and valve B are as follows: The valve A includes a valve plate A and a valve shaft A fixedly connected to the valve plate A. The valve plate A is located inside the air inlet pipe, and the valve shaft A extends out of the air inlet pipe. The valve B includes a valve plate B and a valve shaft B fixedly connected to the valve plate B. The valve plate B is located inside the discharge pipe, and the valve shaft B extends out of the discharge pipe. When valves A and B with the above-described structure are used, the valve control mechanism cooperates with valve shaft A and valve shaft B.

[0009] In the above technical solution, the valve control mechanism adopts the following structure: The valve control mechanism includes a connecting shaft, a worm gear, a worm wheel, and a motor B. The valve shaft A and the valve shaft B are fixedly connected via the connecting shaft. The worm wheel is fixedly connected to the connecting shaft. A connecting frame is fixedly connected between the intake pipe and the exhaust pipe. The worm gear is rotatably connected to the connecting frame. The worm gear meshes with the worm wheel. The motor B is fixedly connected to the connecting frame and is powered by the worm gear.

[0010] The beneficial effects of this utility model are: 1. When valve A is open and valve B is closed, the exhaust gas is filtered normally through the DPF filter element and then discharged from the exhaust pipe. When valve A is closed and valve B is open, the back-blowing mechanism is activated, blowing the air from the exhaust pipe direction back into the DPF filter element, blowing away the particles captured on the windward side of the filter element, and discharging them through the discharge pipe. In this way, the DPF filter element can be cleaned and purified without disassembling the filter element, which greatly improves the service life of the DPF filter element. 2. The back-blowing mechanism uses a motor to drive the fan blades to rotate and generate airflow. The direction of the back-blowing airflow is completely opposite to the direction of the normal exhaust airflow, which can back-blow the DPF filter element. Compared with the existing pulse airflow back-blowing structure, this structure does not require a compressed air system, is simpler in structure, and has a lower cost. Moreover, it uses gentle and continuous back-blowing instead of pulse instantaneous impact, which can greatly protect the DPF filter element and help extend the life of brittle filter elements such as ceramics. 2. The unidirectional transmission characteristic of the worm gear and the design of the rigid connecting shaft ensure that the opening and closing states of valve A and valve B are always completely opposite (if one is open, the other must be closed), forming a mechanical interlock. This fundamentally eliminates the erroneous mode of simultaneous opening or closing of the two valves due to misoperation or circuit failure, ensuring the absolute reliability of the system logic. Furthermore, when motor B stops working, the mechanism will lock in its current position, and the valves will not change their opening or closing state due to airflow pressure or vibration. The working state is stable and reliable. Moreover, only one motor is needed to control the coordinated action of the two valves, simplifying the electrical control system and reducing costs and failure rates. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural schematic diagram of the present invention from another angle; Figure 3 This is a structural schematic diagram of the present invention from another angle; Figure 4 This is a schematic diagram of the internal structure of the purification tank in this utility model; Figure 5 for Figure 4 Detailed structural diagram of part a.

[0012] In the diagram: 100 Purification Tank, 101 Inlet Pipe, 102 Exhaust Pipe, 103 Sludge Discharge Pipe, 200 DPF Filter Element, 301 Mounting Bracket, 302 Fan Blade, 303 Motor A, 304 Shaft, 305 Bevel Gear A, 306 Input Shaft, 307 Bevel Gear B, 400 Valve A, 401 Valve Plate A, 402 Valve Shaft A, 500 Valve B, 501 Valve Plate B, 502 Valve Shaft B, 601 Connecting Shaft, 602 Worm Gear, 603 Worm Gear, 604 Motor B, 605 Connecting Bracket. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] Please see Figures 1-5 A diesel engine online backflushing regeneration purification device includes a purification tank 100, a DPF filter element 200, a backflushing mechanism, and a valve control mechanism. First, the DPF filter element 200 is fixedly connected inside the purification tank 100 to capture particulate matter in the exhaust gas. In addition, an intake pipe 101 is fixedly connected to one end of the purification tank 100, and an exhaust pipe 102 is fixedly connected to the other end. Secondly, a back-blowing mechanism is provided inside the purification tank 100 between the DPF filter element 200 and the exhaust pipe 102. In this embodiment, the back-blowing mechanism includes a mounting frame 301, a fan blade 302, and a motor A303. The mounting frame 301 is fixedly connected inside the purification tank 100, and the fan blade 302 is rotatably connected to the connecting frame 605. The fan blade 302 can be made of a high-temperature resistant material. The motor A303 is fixedly connected to the outside of the purification tank 100. The motor A303 is powered by the fan blade 302. That is, the motor A303 drives the fan blade 302 to rotate at high speed, thereby generating airflow, which back-blowing the DPF filter element 200. With the above-mentioned back-blowing structure, there is no need for a compressed air system, the structure is simpler, the cost is lower, and the gentle and continuous back-blowing, rather than the instantaneous impact of pulses, can greatly protect the DPF filter element 200 and help extend the life of brittle filter elements such as ceramics. Furthermore, a shaft 304 is fixedly connected to the aforementioned fan blade 302, and the shaft 304 is rotatably connected to the mounting bracket 301. At the same time, a bevel gear A305 is fixedly connected to the shaft 304, and an input shaft 306 is rotatably connected to the mounting bracket 301. A bevel gear B307 is fixedly connected to one end of the input shaft 306, and the bevel gear A305 and the bevel gear B307 mesh with each other. The top end of the input shaft 306 passes through the purification tank 100 and is connected to the motor. A dynamic seal is formed between the input shaft 306 and the purification tank 100. This structure allows the motor A303 to be installed outside the purification tank 100, thereby avoiding the influence of high-temperature exhaust gas on the motor and improving the service life and reliability of the motor. Furthermore, a discharge pipe 103 is fixedly connected to the purification tank 100 between the DPF filter element 200 and the inlet pipe 101. A valve A400 is installed on the inlet pipe 101, and a valve B500 is installed on the discharge pipe 103. Valves A400 and B500 are equipped with a valve control mechanism. When valve A400 opens the exhaust pipe 102, valve B500 closes the discharge pipe 103; when valve A400 closes the exhaust pipe 102, valve B500 opens the discharge pipe 103. Thus, the valve control mechanism controls valve A400 to open, and the valve... When B500 is closed, the system is in filtration mode, allowing exhaust gas to pass through the DPF filter element 200 and be filtered before being discharged from the exhaust pipe 102. When the valve control mechanism closes valve A400 and opens valve B500, the back-blowing mechanism is activated, blowing air from the exhaust pipe 102 back into the DPF filter element 200. This blows away particulate matter (PM) collected on the windward side of the filter element and discharges it through the discharge pipe 103. This allows the DPF filter element 200 to be cleaned and purified without disassembling the filter element, greatly improving its service life. Furthermore, in this embodiment, valve A400 includes a valve plate A401 and a valve shaft A402 fixedly connected to the valve plate A401. That is, the valve plate A401 is located inside the air inlet pipe 101, and the valve shaft A402 extends out of the air inlet pipe 101, with a dynamic seal between the valve shaft A402 and the air inlet pipe 101. Similarly, valve B500 includes a valve plate B501 and a valve shaft B502 fixedly connected to the valve plate B501. The valve plate B501 is located inside the waste discharge pipe 103, and the valve shaft B502 extends out of the waste discharge pipe 103, with a dynamic seal between the valve shaft B502 and the waste discharge pipe 103. The valve control mechanism works in conjunction with valve shafts A402 and B502. In other words, the valve control mechanism controls the rotation of valve shafts A402 and B502, thereby causing the internal valve plates A401 and B501 to rotate, so as to realize the opening and closing control of the air intake pipe 101 and the exhaust pipe 103. This ensures that the opening and closing states of valves A400 and B500 are always completely opposite (if one is open, the other must be closed), forming a mechanical interlock. This fundamentally eliminates the erroneous mode of simultaneous opening or closing of the two valves due to misoperation or circuit failure, and ensures the absolute reliability of the system logic. Furthermore, in this embodiment, the valve control mechanism includes a connecting shaft 601, a worm gear 602, a worm wheel 603, and a motor B604. Specifically, the valve shaft A402 and the valve shaft B502 are fixedly connected by the connecting shaft 601, and the worm wheel 603 is fixedly connected to the connecting shaft 601. A connecting frame 605 is fixedly connected between the intake pipe 101 and the exhaust pipe 103, and the worm gear 602 is rotatably connected to the connecting frame 605. The worm gear 602 is meshed with the worm wheel 603, and the motor B604 is fixedly connected to the connecting frame 605. The motor B604 is powered by the worm gear 602. This structure utilizes the self-locking property of the worm wheel 603 and the worm gear 602. When the motor B604 stops working, the mechanism will lock in the current position, and the valve will not change its opening or closing state due to airflow pressure or vibration. This makes the working state stable and reliable, and only one motor is needed to control the coordinated action of two valves, simplifying the electrical control system and reducing costs and failure rates.

[0015] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0016] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A diesel engine online backflushing regeneration purification device, comprising a purification tank (100), a DPF filter element (200), a backflushing mechanism, and a valve control mechanism, wherein the DPF filter element (200) is fixedly connected inside the purification tank (100), an intake pipe (101) is fixedly connected to one end of the purification tank (100), and an exhaust pipe (102) is fixedly connected to the other end, characterized in that: The backflushing mechanism is provided inside the purification tank (100) between the DPF filter element (200) and the exhaust pipe (102). A discharge pipe (103) is fixedly connected to the purification tank (100) between the DPF filter element (200) and the air inlet pipe (101). A valve A (400) is provided on the air inlet pipe (101), and a valve B (500) is provided on the discharge pipe (103). The valve A (400) and the valve B (500) are equipped with the valve control mechanism. When the valve A (400) opens the exhaust pipe (102), the valve B (500) closes the discharge pipe (103). When the valve A (400) closes the exhaust pipe (102), the valve B (500) opens the discharge pipe (103).

2. The diesel engine online backflushing regeneration and purification device according to claim 1, characterized in that: The backflushing mechanism includes a mounting frame (301), a fan blade (302), and a motor A (303). The mounting frame (301) is fixedly connected inside the purification tank (100), and the fan blade (302) is rotatably connected to the mounting frame (301). The motor A (303) is fixedly connected to the outside of the purification tank (100), and the motor A (303) is poweredly connected to the fan blade (302).

3. The diesel engine online backflushing regeneration and purification device according to claim 2, characterized in that: A shaft (304) is fixedly connected to the fan blade (302). The shaft (304) is rotatably connected to the mounting bracket (301). A bevel gear A (305) is fixedly connected to the shaft (304). An input shaft (306) is rotatably connected to the mounting bracket (301). A bevel gear B (307) is fixedly connected to one end of the input shaft (306). The bevel gear A (305) and the bevel gear B (307) are meshed. The top end of the input shaft (306) extends out of the purification tank (100). The motor is poweredly connected to the input shaft (306).

4. The diesel engine online backflushing regeneration and purification device according to claim 1, characterized in that: The valve A (400) includes a valve plate A (401) and a valve shaft A (402) fixedly connected to the valve plate A (401). The valve plate A (401) is located inside the air inlet pipe (101), and the valve shaft A (402) extends out of the air inlet pipe (101). The valve B (500) includes a valve plate B (501) and a valve shaft B (502) fixedly connected to the valve plate B (501). The valve plate B (501) is located inside the discharge pipe (103), and the valve shaft B (502) extends out of the discharge pipe (103). The valve control mechanism cooperates with valve shaft A (402) and valve shaft B (502).

5. The diesel engine online backflushing regeneration and purification device according to claim 4, characterized in that: The valve control mechanism includes a connecting shaft (601), a worm (602), a worm wheel (603), and a motor B (604). The valve shaft A (402) and the valve shaft B (502) are fixedly connected through the connecting shaft (601). The worm wheel (603) is fixedly connected to the connecting shaft (601). A connecting frame (605) is fixedly connected between the air intake pipe (101) and the waste pipe (103). The worm (602) is rotatably connected to the connecting frame (605). The worm (602) is meshed with the worm wheel (603). The motor B (604) is fixedly connected to the connecting frame (605). The motor B (604) is poweredly connected to the worm (602).

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