Exhaust system cleaning device

Abstract

The application provides an exhaust system cleaning device, which comprises a vehicle frame, an exhaust pipe, a first valve, an exhaust bypass channel assembly and an exhaust cleaning channel assembly. The exhaust pipe is arranged on the vehicle frame. The first valve is communicated with the exhaust pipe. The exhaust bypass channel assembly is arranged on the vehicle frame and communicated with the first valve. The exhaust cleaning channel assembly is arranged on the vehicle frame and communicated with the first valve. When the exhaust cleaning channel assembly is blocked, the first valve is used for switching the communication between the exhaust pipe and the exhaust cleaning channel assembly to the communication between the exhaust pipe and the exhaust bypass channel assembly, and the exhaust channel assembly can be cleaned.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to an exhaust system cleaning device. BACKGROUND

[0002] With the development of the national sixth technology of diesel engines, the national sixth exhaust system is often blocked. The current method is to disassemble the exhaust pipe and use cleaning agent to clean and air dry, which has good effect and high cleaning efficiency. However, disassembling the exhaust pipe is relatively cumbersome, and the required professional equipment is high, and the maintenance place is high, which is not suitable for timely maintenance and repair of long-distance transportation. SUMMARY

[0003] The technical problem solved by the present application is to provide an exhaust system cleaning device to solve the problems of cumbersome disassembly and cleaning of the exhaust pipe, high maintenance cost, and requirement of a nearby maintenance site when the exhaust system is blocked.

[0004] To solve the above technical problems, the first technical solution adopted by the present application is to provide an exhaust system cleaning device. The exhaust system cleaning device comprises a vehicle frame, an exhaust pipe, a first valve, an exhaust bypass passage assembly and an exhaust cleaning passage assembly. The exhaust pipe is arranged on the vehicle frame. The first valve is in communication with the exhaust pipe. The exhaust bypass passage assembly is arranged on the vehicle frame and is in communication with the first valve. The exhaust cleaning passage assembly is arranged on the vehicle frame and is in communication with the first valve. When the exhaust cleaning passage assembly is blocked, the first valve is used to switch the communication between the exhaust pipe and the exhaust cleaning passage assembly to the communication between the exhaust pipe and the exhaust bypass passage assembly, and the exhaust cleaning passage assembly can be cleaned.

[0005] In this way, when the exhaust cleaning passage assembly is not blocked, the first valve controls the communication between the exhaust pipe and the exhaust cleaning passage assembly, so that the exhaust gas of the exhaust pipe is discharged through the exhaust cleaning passage assembly. When the exhaust cleaning passage assembly is blocked, the first valve controls the communication between the exhaust pipe and the exhaust bypass passage assembly, so that the exhaust gas of the exhaust pipe is discharged through the exhaust bypass passage assembly; at this time, the blockage of the exhaust cleaning passage assembly can be cleaned. The exhaust bypass passage assembly is arranged to discharge the exhaust gas from the exhaust pipe when cleaning the exhaust cleaning passage assembly; thereby achieving the cleaning of the exhaust system without disassembly, and ensuring the normal discharge of the exhaust gas during cleaning. The problem of disassembly of the exhaust pipe is overcome, and the system cannot be maintained online.

[0006] In some embodiments, the exhaust cleaning passage assembly comprises a catalyst housing and a cleaning head; the catalyst housing has a first accommodating cavity, a second accommodating cavity and a liquid storage cavity which are sequentially communicated; a catalyst body is arranged in the first accommodating cavity, and a particulate filter is arranged in the second accommodating cavity; the liquid storage cavity is in communication with the exhaust pipe; the liquid storage cavity is in communication with the exhaust hole; the first accommodating cavity has an exhaust hole; the cleaning head is arranged on the catalyst housing and is used to clean the inside of the catalyst housing.

[0007] In some embodiments, the catalytic converter housing comprises a first housing, a second housing and a third housing; the catalytic converter body is arranged in the first housing; the particulate filter is arranged in the second housing; the second housing is connected with the first housing, and the second housing is detachably connected with the third housing; the third housing has a storage cavity.

[0008] In some embodiments, the exhaust gas cleaning channel assembly further comprises a fixing ring; the fixing ring detachably connects the second housing and the third housing, and is used for sealing the second housing and the third housing; the cleaning head is arranged on the fixing ring.

[0009] In some embodiments, the exhaust gas cleaning channel assembly further comprises a driving device; the driving device is arranged on the vehicle frame and connected with the catalytic converter housing to drive the catalytic converter housing to shake.

[0010] In some embodiments, the driving device comprises a connecting frame, a movable frame and two first driving cylinders; the connecting frame is arranged on the catalytic converter housing; the connecting frame is rotatably arranged on the vehicle frame through the movable frame; the fixed end of the first driving cylinder is arranged on the vehicle frame, and the telescopic end of the first driving cylinder is connected with the connecting frame through a rotating shaft; the movable frame is located between the two first driving cylinders.

[0011] In some embodiments, the exhaust gas cleaning channel assembly further comprises a safety cylinder; the fixed end of the safety cylinder is arranged on the vehicle frame; the telescopic end of the safety cylinder can extend into a limiting hole on the connecting frame.

[0012] In some embodiments, the exhaust gas cleaning channel assembly further comprises a sealing plate and a second driving cylinder; the cleaning head is connected with the catalytic converter housing through the fixing ring, and the sealing plate is arranged on the fixing ring; the second driving cylinder is arranged on the fixing ring and connected with the sealing plate; the second driving cylinder can drive the sealing plate to open or close a first through hole of the fixing ring; the first through hole can expose the cleaning head.

[0013] In some embodiments, the exhaust gas cleaning channel assembly further comprises a drain pipe and a drain valve; the drain pipe is arranged on the catalytic converter housing and communicates with a drain hole; the drain valve is arranged on the drain pipe and used for opening or closing the drain pipe.

[0014] In some embodiments, the exhaust gas cleaning channel assembly further comprises a gas-liquid input switch; the gas-liquid input switch communicates with the first containing cavity of the catalytic converter housing; the gas-liquid input switch is used for inputting dry gas or cleaning agent into the catalytic converter housing. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0016] Figure 1 is a front view of the exhaust system cleaning device provided by the present application;

[0017] Figure 2 is a rear view of the exhaust system cleaning device provided by the present application;

[0018] Figure 3 is a bottom view of the exhaust system cleaning device provided by the present application;

[0019] Figure 4 is a structural schematic view of an exhaust cleaning passage assembly provided by the present application;

[0020] Figure 5 is a structural schematic view of another exhaust cleaning passage assembly provided by the present application;

[0021] Figure 6 is a structural schematic view of the exhaust cleaning passage assembly in a state provided by the present application;

[0022] Figure 7 is a structural schematic view of the exhaust cleaning passage assembly in another state provided by the present application;

[0023] Figure 8 is a rear view of the exhaust cleaning passage assembly and the exhaust bypass passage assembly provided by the present application;

[0024] Figure 9 is a structural schematic view of a catalyst body, a particulate filter and a DOC catalyst body provided by the present application;

[0025] Figure 10 is a structural schematic view of a fixing ring provided by the present application.

[0026] In the figure: 1, lower cover; 2, upper cover; 3, gas-liquid input switch; 4, pneumatic rotary switch; 5, first shell; 6, second shell; 7, cleaning head; 8, second drive cylinder; 9, fixed ring; 10, first drive cylinder; 11, first valve body; 12, connecting frame; 13, movable frame; 14, safety cylinder; 15, support; 16, exhaust pipe; 17, bypass air pipe; 18, fixed sleeve; 19, third valve body; 20, connecting rod; 21, catalytic converter body; 22, particulate filter; 23, DOC catalytic converter body; 24, sealing plate; 25, limiting plate; 26, drain hole; 27, drain pipe; 28, drain valve; 29, spring; 30, mounting plate; 31, connecting shell; 32, exhaust cleaning channel assembly; 33, exhaust bypass channel assembly. DETAILED DESCRIPTION

[0027] The scheme of the embodiments of the present application will be described in detail below with reference to the accompanying drawings of the specification.

[0028] In the following description, specific details are set forth in order to provide a thorough understanding of the present application. The present application may, however, be practiced without some or all of these details. In other instances, well known methods have not been described in detail in order not to unnecessarily obscure the present application.

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative effort belong to the scope of protection of the present application.

[0030] The terms "first", "second", "third" in the present application are only for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second", "third" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or units inherent to the process, method, product or device.

[0031] Reference to an "embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. As will be apparent to those of ordinary skill in the art, embodiments described herein can be combined with other embodiments.

[0032] Embodiments of the application provide an exhaust system cleaning device. The exhaust system cleaning device is used in a vehicle. Referring to Figures 1-10 The exhaust system cleaning device includes a vehicle frame, an exhaust pipe 16, a first valve, an exhaust bypass passage assembly 33 and an exhaust cleaning passage assembly 32. The exhaust pipe 16 is arranged on the vehicle frame. The exhaust pipe 16 is used to discharge exhaust gas of the vehicle. Of course, the vehicle also includes wheels, an engine, etc.

[0033] The first valve is in communication with the exhaust pipe 16. The exhaust bypass passage assembly 33 is arranged on the vehicle frame and is in communication with the first valve. The exhaust cleaning passage assembly 32 is arranged on the vehicle frame and is in communication with the first valve. When the exhaust cleaning passage assembly 32 is blocked, the first valve is used to switch the communication between the exhaust pipe 16 and the exhaust cleaning passage assembly 32 to the communication between the exhaust pipe 16 and the exhaust bypass passage assembly 33, and the exhaust cleaning passage assembly 32 can be cleaned.

[0034] In this way, when the exhaust cleaning passage assembly 32 is not blocked, the first valve controls the communication between the exhaust pipe 16 and the exhaust cleaning passage assembly 32, so that the exhaust gas of the exhaust pipe 16 is discharged through the exhaust cleaning passage assembly 32. When the exhaust cleaning passage assembly 32 is blocked, the first valve controls the communication between the exhaust pipe 16 and the exhaust bypass passage assembly 33, so that the exhaust gas of the exhaust pipe 16 is discharged through the exhaust bypass passage assembly 33; at this time, the blockage of the exhaust cleaning passage assembly 32 can be cleaned. The exhaust bypass passage assembly 33 and the exhaust cleaning passage assembly 32 both have the function of treating exhaust gas, so that the exhaust gas is discharged after being qualified. Thus, the exhaust bypass passage assembly 33 is arranged to discharge the exhaust gas from the exhaust pipe 16 when the exhaust cleaning passage assembly 32 is cleaned; thereby achieving the cleaning of the exhaust system without disassembly, and ensuring the normal discharge of exhaust gas during cleaning. The problem of disassembling the exhaust pipe 16 is overcome, the maintenance cost is high, the maintenance place is required to be close, and the problem of impact damage of the exhaust system due to the driver's abuse of the blocked exhaust system at a very long distance from the maintenance point or without a maintenance point is avoided.

[0035] The exhaust cleaning channel assembly 32 can be understood as that the exhaust cleaning channel assembly 32 can clean itself (i.e. self-cleaning); it can also be understood as that the exhaust cleaning channel assembly 32 is cleaned by a cleaning device (e.g. a cleaning pump, etc.). In this article, the exhaust cleaning channel assembly 32 can clean itself is taken as an example for description.

[0036] For example, the end of the exhaust cleaning channel assembly 32 (or the first shell 5) can be provided with a plurality of valves. For another example, the end of the exhaust cleaning channel assembly 32 (or the first shell 5) can be provided with a second valve. When the second valve is opened, the exhaust cleaning channel assembly 32 can discharge the exhaust gas from the exhaust pipe 16; when the second valve is closed, the end of the exhaust cleaning channel assembly 32 is sealed and cannot discharge the exhaust gas from the exhaust pipe 16. The second valve can include a cover combined with a lower cover 1 and an upper cover 2, the lower cover 1 is provided with an air inlet hole and an air outlet hole; the air inlet hole is in communication with the end of the exhaust cleaning channel assembly 32, and the air outlet hole is used to discharge the exhaust gas. The upper cover 2 is connected with, for example, two pneumatic rotary switches 4, the rotary shaft of the pneumatic rotary switch 4 is connected with a disc. When the rotary disc blocks the air outlet hole, the end of the exhaust cleaning channel assembly 32 is sealed.

[0037] The first valve can be an automatic valve or a manual valve. The first valve can also have the same structure as the second valve, and reference is made to the related description of the second valve above.

[0038] The exhaust bypass channel assembly 33 can include a bypass shell, a bypass air pipe 17, a fixing sleeve 18, a connecting rod 20 and a third valve. The bypass shell is provided with a DOC catalyst body, an SCR+ASC catalyst body and a DPF particulate filter; the bypass shell is in communication with the bypass air pipe 17 through the third valve, the bypass air pipe 17 is in communication with the first valve body 11; the bypass shell is sleeved on the fixing sleeve 18, and the fixing sleeve 18 is fixed on the frame through the connecting rod 20. During cleaning, the third valve is opened, and the first valve makes the third valve in communication with the exhaust pipe 16; after cleaning, the third valve is closed, and the first valve makes the exhaust pipe 16 in communication with the exhaust cleaning channel assembly 32. Of course, the exhaust bypass channel assembly 33 can also have other structures, such as the existing exhaust gas absorption device. Since the exhaust bypass channel assembly 33 is used only during cleaning, and the cleaning time is relatively short, the exhaust bypass channel assembly 33 is not easy to be blocked and can be used for a long time.

[0039] The frame can also be referred to as a cross beam.

[0040] In some embodiments, the exhaust gas cleaning channel assembly 32 comprises a catalyst housing and a cleaning head 7. The catalyst housing has a first accommodating cavity, a second accommodating cavity and a liquid storage cavity in sequence; the catalyst body 21 is arranged in the first accommodating cavity, and the particulate filter 22 is arranged in the second accommodating cavity; the liquid storage cavity is in communication with the first valve; the liquid storage cavity has a discharge hole; the liquid storage cavity is in communication with the discharge hole 26; the first accommodating cavity has an exhaust hole; the cleaning head 7 is arranged on the catalyst housing, and the cleaning head 7 is used for cleaning the inside of the catalyst housing.

[0041] In this way, the liquid storage cavity stores the cleaning agent, and the cleaning head 7 is used to clean the particulate filter 22 soaked in the cleaning agent, thereby achieving immersion physical cleaning of ash and adhesions; there is no chemical action, and it is simple and efficient. The dirty cleaning agent after cleaning is discharged through the discharge hole 26.

[0042] The cleaning head 7 is used to clean the inside of the catalyst housing, which can be understood as that the cleaning head 7 cleans multiple parts of the inside of the catalyst housing; for example, the cleaning head 7 can clean the inner wall of the catalyst housing; for another example, the cleaning head 7 can also clean the particulate filter 22; for another example, the cleaning head 7 can also clean the catalyst body 21, etc.

[0043] The cleaning head 7 is arranged on the catalyst housing, which can be understood as that the entire cleaning head 7 is arranged in the catalyst housing; it can also be understood as that part of the cleaning head 7 is located outside the catalyst housing, and the other part is located in the catalyst housing and performs cleaning; it can also be understood as that the entire cleaning head 7 is located outside the catalyst housing, and the through hole of the catalyst housing can expose the cleaning head 7 (or the entire cleaning head 7 is located outside the fixing ring 9, and the first through hole of the fixing ring 9 can expose the cleaning head 7).

[0044] The catalyst body 21 can be a common SCR+ASC catalyst body on a national sixth diesel engine (SCR stands for selective catalytic reduction technology, and ASC stands for ammonia escape catalyst). The particulate filter 22 can be a DPF particulate filter for collecting diesel particulate matter. The cleaning head 7 can be an ultrasonic cleaning head 7. The number of cleaning heads 7 can be multiple and arranged along the circumference. The liquid storage cavity can be provided with a DOC catalyst body.

[0045] The exhaust hole is in communication with the second valve body described above.

[0046] In some embodiments, the catalyst housing comprises a first housing 5, a second housing 6 and a third housing; the catalyst body 21 is arranged in the first housing 5; the particulate filter 22 is arranged in the second housing 6; the second housing 6 is connected with the first housing 5, the second housing 6 is detachably connected with the third housing, and the third housing has a storage cavity.

[0047] The second shell 6 and the first shell 5 can be fixedly connected or detachably connected. For example, the second shell 6 and the first shell 5 are connected by bolts, facilitating segmented disassembly and maintenance without the need to disassemble the entire catalytic converter shell, which is simple and convenient. For example, the particulate filter 22 is fixedly connected in the second accommodating cavity (or the second shell 6) by interference.

[0048] The second shell 6 and the third shell are detachably connected, facilitating segmented disassembly and maintenance without the need to disassemble the entire catalytic converter shell, which is simple and convenient.

[0049] In some embodiments, the exhaust gas washing channel assembly 32 further comprises a fixing ring 9; the fixing ring 9 detachably connects the second shell 6 and the third shell and is used for sealing the second shell 6 and the third shell; and the washing head 7 is arranged on the fixing ring 9. In this way, the washing head 7 can be replaced while the second shell 6 and the third shell are disassembled and maintained. The washing head 7 is detachably arranged on the fixing ring 9.

[0050] The fixing ring 9 can be a clamp or other structures such as a flange. The fixing ring 9 can have an outer convex body, and the washing head 7 can be arranged on the outer convex body. The catalytic converter shell can be arranged on the vehicle frame through the fixing ring 9; of course, the catalytic converter shell can be directly connected to the vehicle frame.

[0051] For example, the second shell 6 and the third shell are detachably connected by bolts.

[0052] In some embodiments, the exhaust gas washing channel assembly 32 further comprises a driving device; the driving device is arranged on the vehicle frame and connected to the catalytic converter shell to drive the catalytic converter shell to tilt or sway. In this way, the driving device can drive the catalytic converter shell to tilt or sway, so that the washing agent in the catalytic converter shell fully contacts the particulate filter 22 and the like, without the need to fill the washing agent to soak the particulate filter 22 and the like, thereby saving the washing agent and effectively enhancing the washing effect.

[0053] For example, the driving device can be a bidirectional motor. The motor is installed on the vehicle frame, and the motor drives the exhaust gas washing channel to rotate (for example, by 30° or the like).

[0054] In some embodiments, the driving device can include a connecting frame 12, a movable frame 13, and two first driving cylinders 10 (which can be referred to as a first driving sub-cylinder and a second driving sub-cylinder). The connecting frame 12 is arranged on the catalytic converter shell; the connecting frame 12 is rotatably arranged on the vehicle frame through the movable frame 13; the fixed end of the first driving cylinder 10 is arranged on the vehicle frame, and the telescopic end of the first driving cylinder 10 is connected with the connecting frame 12 through a rotating shaft; the movable frame 13 is located between the two first driving cylinders 10. In this way, when the two first driving cylinders 10 are telescoped, the two first driving cylinders 10 drive the catalytic converter shell to swing around the center of the movable frame 13, so that the catalytic converter shell swings. The first driving cylinder 10 can also achieve the effect of reducing noise and vibration, thereby improving the NVH performance and providing the driver with a better driving experience and comfort.

[0055] The number of the first driving sub-cylinder and the second driving sub-cylinder can be two, and the number of the first driving cylinder 10 can be four at this time. Two first driving cylinders 10 are arranged on each side of the movable frame 13. The first driving cylinder 10 can be connected to the vehicle frame through a support 15 or can be directly connected to the vehicle frame.

[0056] The movable frame 13 can be a movable structure; for example, it can be a universal shaft, which can make the catalytic converter shell bounce; for another example, it can also be a hinge, which can make the catalytic converter shell swing.

[0057] The connecting frame 12 can be fixedly connected with the fixing ring 9. The connecting frame 12 can be a plate, a frame, a block, etc.

[0058] In some embodiments, the exhaust cleaning channel assembly 32 further includes a safety cylinder 14; the fixed end of the safety cylinder 14 is arranged on the vehicle frame; and the telescopic end of the safety cylinder 14 can be inserted into a limiting hole on the connecting frame 12. In this way, when the automobile is normally driven, the safety cylinder 14 is inserted into the limiting hole, which can prevent the catalytic converter shell from swinging and falling off. The exhaust pipe 16 can be a soft corrugated pipe, which is easy to bend and deform, but will not fold and be incommunicado. During cleaning, the safety cylinder 14 is withdrawn from the limiting hole, so that the catalytic converter shell can swing.

[0059] In some embodiments, the exhaust cleaning channel assembly 32 further includes a sealing plate 24 and a second driving cylinder 8; the cleaning head 7 is connected with the catalytic converter shell through the fixing ring 9, and the sealing plate 24 is arranged on the fixing ring 9; the second driving cylinder 8 is arranged on the fixing ring 9 and connected with the sealing plate 24; the second driving cylinder 8 can drive the sealing plate 24 to open or close the first through hole of the fixing ring 9; and the first through hole can expose the cleaning head 7.

[0060] In this way, the second driving cylinder 8 drives the sealing plate 24 to open the first through hole, and the cleaning head 7 can clean the components inside the catalytic converter housing through the first through hole. The second driving cylinder 8 drives the sealing plate 24 to close the first through hole, effectively preventing the high-temperature exhaust gas from eroding the non-working components such as the cleaning head 7 in the non-cleaning state, thereby effectively prolonging the service life of the system.

[0061] The material of the sealing plate 24 is a soft metal material resistant to high temperature.

[0062] The exhaust cleaning channel assembly 32 further comprises a limiting plate 25 fixedly connected to the fixed ring 9 and used for limiting the sealing plate 24.

[0063] In some embodiments, the exhaust cleaning channel assembly 32 further comprises a drain pipe 27 and a drain valve 28; the drain pipe 27 is arranged on the catalytic converter housing and communicates with the drain hole 26; and the drain valve 28 is arranged on the drain pipe 27 and used for opening or closing the drain pipe 27. In this way, the arranged drain pipe 27 and the drain valve 28 can drain the cleaning agent.

[0064] In some examples, the drain valve 28 can be an on-off valve. The on-off valve is connected to the mounting plate 30, and the on-off valve drives the mounting plate 30 to move up and down, so as to drive the mounting plate 30 to close or open the communication port of the connecting shell 31, which communicates with the drain hole 26. The exhaust cleaning channel assembly 32 further comprises a return spring 29, which is used for connecting the mounting plate 30 and the connecting shell 31 to close the communication port when there is no cleaning.

[0065] The drain hole 26 is located at the lowest part of the fixed ring 9.

[0066] In some embodiments, the exhaust cleaning channel assembly 32 further comprises a gas-liquid input switch 3; the gas-liquid input switch 3 communicates with the first containing cavity of the catalytic converter housing; and the gas-liquid input switch 3 is used for inputting dry gas or cleaning agent into the catalytic converter housing. The cleaning agent is input into the catalytic converter housing by using the gas-liquid input switch 3; and high-pressure gas can be input into the catalytic converter housing by using the gas-liquid input switch 3 when it is dry.

[0067] In some examples, the gas-liquid input switch 3 can communicate with the second valve body. In other examples, the gas-liquid input switch 3 communicates with the first housing 5.

[0068] For example, the drain hole 26 can also be used to inject the cleaning agent into the liquid storage cavity and drain the cleaning agent.

[0069] The first driving cylinder 10, the second driving cylinder 8 and the safety cylinder 14 can be hydraulic cylinders or pneumatic cylinders.

[0070] When the exhaust pressure is high and the power is low, the first valve makes the exhaust pipe 16 communicate with the exhaust bypass channel assembly 33 to exhaust the exhaust gas, and the exhaust cleaning channel assembly 32 is sealed (i.e. the first valve and the second valve close the exhaust cleaning channel assembly 32). The exhaust valve 28 is closed, the safety cylinder 14 is retracted, and the cleaning agent is injected into the catalytic converter housing by using the gas-liquid input switch 3; the cleaning head 7 is started to clean.

[0071] After the cleaning head 7 cleans for a period of time, the two first driving cylinders 10 shake the catalytic converter housing (for example, the two first driving cylinders 10 move in sequence to flip the catalytic converter housing clockwise and counterclockwise), so as to quickly flush stubborn dirt and ash, achieving the purpose of secondary cleaning.

[0072] After cleaning, the waste water is discharged by opening the exhaust hole 26, and the cleaning is completed; and the residual water and dirt are blown out of the exhaust hole 26 by using gas (such as high-pressure air), and the cleaning is completed.

[0073] Finally, the first valve makes the exhaust pipe 16 communicate with the exhaust cleaning channel assembly 32 to exhaust the exhaust gas. The exhaust valve 28 is opened, and the safety cylinder 14 is inserted into the limiting hole. Therefore, the exhaust cleaning channel assembly 32 can normally operate to exhaust the exhaust gas, and the vehicle can normally run.

[0074] The above is only an embodiment of the present application, and does not limit the patent protection scope of the present application. Any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the present application.

Claims

1. An exhaust system cleaning device, characterized by The exhaust system cleaning device comprises a vehicle frame, an exhaust pipe arranged on the vehicle frame, a first valve communicating with the exhaust pipe, an exhaust bypass channel assembly arranged on the vehicle frame and communicating with the first valve, and an exhaust cleaning channel assembly arranged on the vehicle frame and communicating with the first valve. The exhaust cleaning channel assembly further comprises a driving device arranged on the vehicle frame and connected with a catalytic converter housing of the exhaust cleaning channel assembly to drive the catalytic converter housing to shake. The exhaust cleaning channel assembly comprises a cleaning head, a fixing ring, a sealing plate and a second driving cylinder. The catalytic converter housing comprises a first housing, a second housing and a third housing. The second housing and the third housing are detachably connected by the fixing ring and are sealed by the fixing ring. The second driving cylinder is arranged on the fixing ring and connected with the sealing plate. The second driving cylinder can drive the sealing plate to open or close a first through hole of the fixing ring. The first through hole can expose the cleaning head.

2. The exhaust system cleaning device according to claim 1, wherein the driving device comprises a connecting frame, a movable frame and two first driving cylinders. The connecting frame is arranged on the catalytic converter housing. The connecting frame is rotatably arranged on the vehicle frame through the movable frame. The fixed end of the first driving cylinder is arranged on the vehicle frame. The telescopic end of the first driving cylinder is connected with the connecting frame through a rotating shaft. The movable frame is located between the two first driving cylinders.

3. The exhaust system cleaning device according to claim 2, wherein the exhaust cleaning channel assembly further comprises a safety cylinder. The fixed end of the safety cylinder is arranged on the vehicle frame. The telescopic end of the safety cylinder can extend into a limiting hole on the connecting frame.

4. The exhaust system cleaning device according to claim 1, wherein the exhaust cleaning channel assembly further comprises a discharge pipe and a discharge valve. The discharge pipe is arranged on the catalytic converter housing and communicates with the discharge hole. The discharge valve is arranged on the discharge pipe and is used to open or close the discharge pipe.

5. The exhaust system cleaning device of claim 1, wherein: the exhaust cleaning passage assembly further comprises a gas-liquid input switch; the gas-liquid input switch is in communication with the first accommodating cavity of the catalytic converter housing; and the gas-liquid input switch is used for inputting dry gas or cleaning agent into the catalytic converter housing.

Images