1. The utility model provides an aftertreatment ware high pressure sweeps ash removal device which characterized in that includes: the device comprises a base (1), a high-pressure purging module (2) and a dust collecting module (3);

a conical cavity (11) with a downward tip is arranged on the base (1), and a through hole is formed in the lower end of the conical cavity (11);

the high-pressure purging module (2) comprises a high-pressure gas spray head (21), the high-pressure gas spray head (21) is arranged above the conical cavity (11), and the high-pressure gas spray head (21) is used for injecting high-pressure gas flow to the exhaust end of the DPF postprocessor;

the through hole is communicated with the dust collecting module (3).

2. The high-pressure purging and ash-cleaning device for the post-processor as claimed in claim 1, wherein: the high-pressure blowing and ash removing device for the post-processor further comprises an optical detection module (4), wherein the optical detection module (4) comprises: the LED lamp comprises a supporting base (41) and a light source (42), wherein a groove or an opening is formed in the supporting base (41), the light source (42) is arranged in the groove or the opening, and the upper end of the light source (42) is lower than the upper end face of the supporting base (41);

the light detection module (4) further comprises: a light intensity sensor (43), wherein the light intensity sensor (43) is arranged right above the light source (42).

3. The high-pressure purging and ash-cleaning device for the post-processor as claimed in claim 2, wherein: base (1) is still including sealed pad (12), sealed pad (12) set up in conical cavity (11), and sealed pad (12) is the funnel structure that suits with conical cavity (11), sealed pad (12) adopt silica gel.

4. The high-pressure purging and ash-cleaning device of the post-processor as claimed in claim 3, wherein: the high-pressure gas nozzle (21) is a stainless steel tube, the head of which is sleeved with a silicone tube, and the inner diameter of the silicone tube is 1.0-3.0 cm.

5. The high-pressure purging and ash-cleaning device for the post-processor as claimed in claim 4, wherein: the high-pressure purge module (2) further comprises: high pressurized gas source (22) and removal module (23), high pressurized gas source (22) and high-pressure gas shower nozzle (21) intercommunication, high pressurized gas source (22) provide high-pressure gas flow for high-pressure gas shower nozzle (21), high-pressure gas shower nozzle (21) and removal module (23) fixed connection, removal module (23) realize that high-pressure gas shower nozzle (21) removes in three-dimensional space.

6. The high-pressure purging and ash-cleaning device for the post-processor as claimed in claim 5, wherein: the high pressure gas source (22) comprises: the device comprises a main tank (221) and a sub-tank (222), wherein an input port of the main tank (221) is communicated with an air pump or an external air compressor, an output port of the main tank (221) is communicated with the sub-tank (222), an electromagnetic valve A is arranged on a communication pipeline between the main tank (221) and the sub-tank (222), an output end of the sub-tank (222) is communicated with a high-pressure gas nozzle (21), and electromagnetic valves B are arranged on pipelines between the sub-tank (222) and the high-pressure gas nozzle (21);

and gas pressure sensors (223) are arranged in the main tank (221) and the sub-tank (222).

7. The high-pressure purging and ash-cleaning device for the post-processor as claimed in claim 6, wherein: the movement module (23) comprises: the X-axis nut screw rod, the Y-axis nut screw rod, the Z-axis nut screw rod and the stepping motor are arranged on the base; the X-axis nut screw comprises: x lead screw and X ball nut, Y axle nut lead screw includes: y lead screw and Y ball nut, Z axle nut lead screw includes: a Z screw rod and a Z ball nut,

the X lead screw is horizontally fixed above the conical cavity (11), one end of the Y lead screw is fixedly connected with the X ball nut, the other end of the Y lead screw is fixedly connected with a sliding block of the X lead screw parallel sliding rail, the Y lead screw is perpendicular to the X lead screw, the Z lead screw is vertically arranged on the Y ball nut, the high-pressure gas spray head (21) is fixed on the Z ball nut, the number of the stepping motors is three, and the three stepping motors are coaxially and fixedly connected with the X lead screw, the Y lead screw and the Z lead screw in a one-to-one correspondence manner.

8. The high-pressure purging and ash-cleaning device for the post-processor as claimed in claim 7, wherein: the ash collection module (3) comprises: the air conditioner comprises a fan (31) and a water tank (32), wherein an inlet of the fan (31) is communicated with the through hole, an outlet of the fan (31) is communicated with the bottom of the water tank (32), and liquid is filled in the water tank (32);

and an air negative pressure detection sensor (33) is arranged on a pipeline for communicating the fan (31) and the through hole.

9. The high-pressure purging and ash-cleaning device for the post-processor as claimed in claim 8, wherein: the high-pressure blowing and ash removing device for the postprocessor further comprises an electronic scale, and the electronic scale is used for detecting the mass of the DPF after-treater before and after blowing.

10. The high-pressure purging and ash-cleaning device for the post-processor as claimed in claim 9, wherein: the high-pressure blowing and ash removing device for the post-processor further comprises a control module, wherein the control module comprises: the emergency stop control system comprises a control center, a display panel, a power supply, a start button and an emergency stop button; the control center is respectively and electrically connected with the three stepping motors, the fan (31), the display panel, the light source (42) and the detection sensor (43), the power supply provides power for the high-pressure blowing and dust removing device of the post-processor, and the starting button and the emergency stop button are arranged on a power supply bus.

Background

The tail gas emission of the diesel vehicle engine contains two harmful components: PM soot particulate matter and nitrogen oxides (Nox). The DPF soot trap is required to be additionally installed aiming at PM soot particles in vehicle exhaust.

At present, DOC, DPF and SCR are connected in series with post-processors with three different functions in a diesel vehicle. The front-stage DOC catalyst oxidizes NO produced by combustion with the engine to produce NO 2. After entering the DPF, NO2 molecular bonds can be broken at a lower temperature (about 250 ℃), and the generated oxygen and the captured C particles are combusted to generate CO 2. Most common running conditions of the diesel vehicle can meet the regeneration temperature (250-500 ℃) in the DPF, so that PM soot particles can be effectively removed. However, when the DPF collects and treats soot particulates discharged after combustion of an engine, only the carbon particulates are burnt, ash cannot be burnt, and carbon ash in the DPF is accumulated more and more along with accumulation of time, so that periodic ash removal treatment needs to be performed on the DPF. The conventional method is to bake the carbon particles accumulated in the DPF by using an electric furnace, manually blow ash which cannot be burned off by using a high-pressure air gun, wherein the diameters of the DPF are different, the number of meshes is between ten thousand and thirty thousand, the meshes need to be blown through one by one during manual ash blowing, the workload is huge, all the meshes of the honeycomb cannot be accurately blown in place, and more importantly, the dust is diffused in the air due to manual ash blowing, so that secondary pollution is caused to the environment.

Disclosure of Invention

In order to solve the technical problem, the invention provides a high-pressure gas automatic ash removal device special for a diesel engine tail gas post-processor DPF.

In order to achieve the technical purpose, the technical scheme provided by the invention is as follows:

an aftertreatment device high pressure purging ash removal device comprising: the device comprises a base, a high-pressure blowing module and an ash collecting module;

a conical cavity with a downward tip is arranged on the base, and a through hole is formed in the lower end of the conical cavity;

the high-pressure blowing module comprises a high-pressure gas nozzle, the high-pressure gas nozzle is arranged above the conical cavity, and the high-pressure gas nozzle is used for injecting high-pressure gas flow to the exhaust end of the DPF postprocessor;

the through hole is communicated with the dust collecting module.

The high-pressure blowing and ash removing device for the post-processor further comprises an optical detection module, wherein the optical detection module comprises: the LED lamp holder comprises a supporting base and a light source, wherein a groove or an opening is formed in the supporting base, the light source is arranged in the groove or the opening, and the upper end of the light source is lower than the upper end face of the supporting base.

The base still includes sealed the pad, sealed pad sets up in conical cavity, and sealed pad is the funnel structure that suits with conical cavity, sealed pad adopts silica gel.

The high-pressure gas nozzle is a stainless steel tube, the head of which is sleeved with a silicone tube, and the inner diameter of the silicone tube is 1.0-3.0 cm.

The high pressure purge module further comprises: the high-pressure gas source is communicated with the high-pressure gas spray head, the high-pressure gas source provides high-pressure gas flow for the high-pressure gas spray head, the high-pressure gas spray head is fixedly connected with the moving module, and the moving module realizes that the high-pressure gas spray head moves in a three-dimensional space.

The high-pressure gas source comprises: the device comprises a main tank and a sub-tank, wherein an input port of the main tank is communicated with an air pump or an external air compressor, an output port of the main tank is communicated with the sub-tank, a communication pipeline of the main tank and the sub-tank is provided with an electromagnetic valve A, an output end of the sub-tank is communicated with a high-pressure gas nozzle, and a pipeline of the sub-tank and the high-pressure gas nozzle is provided with an electromagnetic valve B;

and gas pressure sensors are arranged in the main tank and the sub-tanks.

The moving module includes: the X-axis nut screw rod, the Y-axis nut screw rod, the Z-axis nut screw rod and the stepping motor are arranged on the base; the X-axis nut screw comprises: x lead screw and X ball nut, Y axle nut lead screw includes: y lead screw and Y ball nut, Z axle nut lead screw includes: a Z screw rod and a Z ball nut,

the X lead screw is horizontally fixed above the conical cavity, one end of the Y lead screw is fixedly connected with the X ball nut, the other end of the Y lead screw is fixedly connected with a sliding block of the X lead screw parallel sliding rail, the Y lead screw is perpendicular to the X lead screw, the Z lead screw is vertically arranged on the Y ball nut, the high-pressure gas spray head is fixed on the Z ball nut, the number of the stepping motors is three, and the three stepping motors are coaxially and fixedly connected with the X lead screw, the Y lead screw and the Z lead screw in a one-to-one correspondence manner.

The ash collecting module comprises: the fan inlet is communicated with the through hole, the fan outlet is communicated with the bottom of the water tank, and the water tank is filled with liquid;

and an air negative pressure detection sensor is arranged on a pipeline for communicating the fan and the through hole.

The high-pressure blowing and ash removing device for the postprocessor further comprises an electronic scale, and the electronic scale is used for detecting the mass of the DPF after-treater before and after blowing.

The high-pressure blowing and ash removing device for the post-processor further comprises a control module, wherein the control module comprises: the emergency stop control system comprises a control center, a display panel, a power supply, a start button and an emergency stop button; the control center is respectively and electrically connected with the three stepping motors, the fan, the display panel, the light source and the detection sensor, the power supply provides power for the high-pressure blowing and dust removing device of the post-processor, and the starting button and the emergency stop button are arranged on a power supply bus. Compared with the prior art, the invention has the following beneficial effects:

firstly, the high-pressure blowing module is adopted, the high-pressure gas nozzle can be used for simultaneously blowing and dredging the holes of the postprocessors, meanwhile, after the postprocessors are subjected to high-temperature treatment, the ash accumulated in the postprocessors can be thoroughly removed under the action of gas blowing, and the mesh damage of the DPF postprocessors due to overhigh gas pressure can be avoided due to the fact that the high-pressure gas pressure can be set.

The ash collecting module is adopted, ash can be collected, and meanwhile, the ash can be conveniently collected through the water tank, so that secondary environmental pollution is avoided.

And thirdly, the invention adopts the light detection module to directly judge the cleaning effect of the DPF postprocessor and detects the dredging rate of the honeycomb meshes of the DPF postprocessor through the wall flow hole floodlight intensity of the DPF.

And fourthly, the fan is adopted, and the sealing gasket is combined, so that a negative pressure environment is formed in the conical cavity, and the raised ash is prevented from entering the honeycomb net eye of the DPF postprocessor again.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

FIG. 2 is a schematic structural diagram of a light detection module in accordance with embodiment 1 of the present invention.

FIG. 3 is a schematic structural diagram of a light detecting module in accordance with embodiment 2 of the present invention.

FIG. 4 is a schematic diagram of a moving module according to the present invention.

FIG. 5 is a schematic structural diagram of the ash collecting module according to the present invention.

FIG. 6 shows the present invention

In the figure: 1 is the base, 2 is the high pressure module of sweeping, 3 is the ash collecting module, 4 is the optical detection module, 11 is conical cavity, 12 is sealed pad, 21 is the high-pressure gas shower nozzle, 22 is high-pressure gas source, 23 is the removal module, 31 is the fan, 32 is the water tank, 33 is air negative pressure detection sensor, 41 is the support base, 42 is the light source, 43 is the detection sensor, 221 is the main tank, 222 is the sub-tank, 223 is gas pressure sensor.

Detailed Description

For a further understanding of the invention, reference is made to the following detailed description taken in conjunction with the accompanying drawings and examples:

example 1

An aftertreatment device high pressure purging ash removal device comprising: the device comprises a base 1, a high-pressure purging module 2 and an ash collecting module 3;

a conical cavity 11 with a downward tip is arranged on the base 1, and a through hole is arranged at the lower end of the conical cavity 11;

the high-pressure purging module 2 comprises a high-pressure gas nozzle 21, the high-pressure gas nozzle 21 is arranged above the conical cavity 11, and the high-pressure gas nozzle 21 is used for injecting high-pressure gas flow to the exhaust end of the DPF postprocessor;

the through hole is communicated with the dust collecting module 3.

The high-pressure blowing and ash removing device for the post-processor further comprises an optical detection module 4, wherein the optical detection module 4 comprises: the light source device comprises a supporting base 41 and a light source 42, wherein a groove or an opening is formed in the supporting base 41, the light source 42 is arranged in the groove or the opening, and the upper end of the light source 42 is lower than the upper end face of the supporting base 41.

Base 1 still includes sealed pad 12, sealed pad 12 sets up in conical cavity 11, and sealed pad 12 is the funnel structure that suits with conical cavity 11, sealed pad 12 adopts silica gel.

The high-pressure gas nozzle 21 is a stainless steel pipe, the head of which is sleeved with a silicone tube, and the inner diameter of the silicone tube is 1.0-3.0 cm.

The high-pressure purge module 2 further comprises: high-pressure gas source 22 and removal module 23, high-pressure gas source 22 and high-pressure gas shower nozzle 21 intercommunication, high-pressure gas source 22 provides high-pressure gas flow for high-pressure gas shower nozzle 21, high-pressure gas shower nozzle 21 and removal module 23 fixed connection, removal module 23 realizes that high-pressure gas shower nozzle 21 removes in three-dimensional space.

The high-pressure gas source 22 includes: the main tank 221 and the sub-tank 222 are connected, an input port of the main tank 221 is communicated with an air pump or an external air compressor, an output port of the main tank 221 is communicated with the sub-tank 222, a pipeline connecting the main tank 221 and the sub-tank 222 is provided with an electromagnetic valve A, an output port of the sub-tank 222 is communicated with the high-pressure gas nozzle 21, and pipelines connecting the sub-tank 222 and the high-pressure gas nozzle 21 are provided with an electromagnetic valve B;

the main tank 221 and the sub-tank 222 are each provided therein with a gas pressure sensor 223.

The moving module 23 includes: the X-axis nut screw rod, the Y-axis nut screw rod, the Z-axis nut screw rod and the stepping motor are arranged on the base; the X-axis nut screw comprises: x lead screw and X ball nut, Y axle nut lead screw includes: y lead screw and Y ball nut, Z axle nut lead screw includes: a Z screw rod and a Z ball nut,

the X lead screw is horizontally fixed above the conical cavity 11, one end of the Y lead screw is fixedly connected with the X ball nut, the other end of the Y lead screw is fixedly connected with a sliding block of the X lead screw parallel sliding rail, the Y lead screw is perpendicular to the X lead screw, the Z lead screw is vertically arranged on the Y ball nut, the high-pressure gas spray head 21 is fixed on the Z ball nut, the number of the stepping motors is three, and the three stepping motors are coaxially and fixedly connected with the X lead screw, the Y lead screw and the Z lead screw in a one-to-one correspondence manner.

The dust collection module 3 includes: the air blower 31 and the water tank 32, the inlet of the air blower 31 is communicated with the through hole, the outlet of the air blower 31 is communicated with the bottom of the water tank 32, and the water tank 32 is filled with liquid;

and an air negative pressure detection sensor 33 is arranged on a pipeline for communicating the fan 31 with the through hole.

The high-pressure blowing and ash removing device for the postprocessor further comprises an electronic scale, and the electronic scale is used for mass before and after the DPF postprocessor is blown.

The high-pressure blowing and ash removing device for the post-processor further comprises a control module, wherein the control module comprises: the emergency stop control system comprises a control center, a display panel, a power supply, a start button and an emergency stop button; the control center is respectively connected with the three stepping motors, the fan 31, the display panel, the light source 42 and the electric connector, the power supply provides electric power for the high-pressure blowing and dust removing device of the post-processor, and the starting button and the emergency stop button are arranged on a power supply bus of the power supply.

The operation and application process of the embodiment is as follows: DPF cools down after the electric oven toasts, and DPF can weigh before the clearance, then places on supporting base 41, and DPF edge and sealed pad in close contact with ensure that DPF center aligns with the through-hole center, provides the DPF parameter to the system through display panel: including DPF height and size, start high pressure and sweep module 2, high-pressure gas source 22 provides high-pressure gas flow for high-pressure gas shower nozzle 21, can set for main jar 221 and sub-jar 222 internal pressure in advance through control module, compare main jar 221 and sub-jar 222 with the setting value with the gas pressure sensor perception, and then control solenoid valve A and solenoid valve B open and close, it is specific: the pressure of the main tank 221 is greater than that of the sub-tank 222, when the high-pressure gas sprayer 21 works, the sub-tank 222 instantly discharges gas through the high-pressure gas sprayer 21 to achieve the purpose of high-pressure purging, at the moment, the moving module 23 drives the high-pressure gas sprayer 21 to enter the next working position, in the gap, the main tank 221 instantly supplements the pressure to the sub-tank 222, after the sub-tank 222 reaches the set pressure, the main tank 221 stops supplying gas to the sub-tank 222, the sub-tank 222 enters the working state again, the main tank 221 supplements the gas in the working process of the high-pressure gas sprayer 21, and repeated actions are achieved.

The moving module 23 controls the high-pressure gas nozzle 21 to purge on the DPF in sequence, simultaneously starts a fan, discharges ashes to the water tank 32, the conical cavity 11 forms negative pressure under the effect of the fan, the numerical value of the air negative pressure detection sensor 33 can directly reflect the dredging state of the DPF, in addition, the DPF can be weighed again after the completion to judge the ash removal quality, and the DPF can be placed in the light detection module 4 to judge the dredging effect of the DPF hole through visual observation.

Example 2

As shown in fig. 1 to 4: the invention discloses a high-pressure blowing ash removal device for an aftertreatment device, which comprises: the device comprises a base 1, a high-pressure purging module 2 and an ash collecting module 3;

a conical cavity 11 with a downward tip is arranged on the base 1, and a through hole is arranged at the lower end of the conical cavity 11;

the high-pressure purging module 2 comprises a high-pressure gas nozzle 21, the high-pressure gas nozzle 21 is arranged above the conical cavity 11, and the high-pressure gas nozzle 21 is used for injecting high-pressure gas flow to the exhaust end of the DPF postprocessor;

the through hole is communicated with the dust collecting module 3.

The high-pressure blowing and ash removing device for the post-processor further comprises an optical detection module 4, wherein the optical detection module 4 comprises: the light source module comprises a supporting base 41 and a light source 42, wherein a groove or an opening is formed in the supporting base 41, the light source 42 is arranged in the groove or the opening, and the upper end of the light source 42 is lower than the upper end face of the supporting base 41;

the light detection module 4 further comprises: and a light intensity sensor 43, wherein the light intensity sensor 43 is arranged right above the light source 42.

Base 1 still includes sealed pad 12, sealed pad 12 sets up in conical cavity 11, and sealed pad 12 is the funnel structure that suits with conical cavity 11, sealed pad 12 adopts silica gel.

The high-pressure gas nozzle 21 is a stainless steel pipe, the head of which is sleeved with a silicone tube, and the inner diameter of the silicone tube is 1.0-3.0 cm.

The high-pressure purge module 2 further comprises: high-pressure gas source 22 and removal module 23, high-pressure gas source 22 and high-pressure gas shower nozzle 21 intercommunication, high-pressure gas source 22 provides high-pressure gas flow for high-pressure gas shower nozzle 21, high-pressure gas shower nozzle 21 and removal module 23 fixed connection, removal module 23 realizes that high-pressure gas shower nozzle 21 removes in three-dimensional space.

The high-pressure gas source 22 includes: the main tank 221 and the sub-tank 222 are connected, an input port of the main tank 221 is communicated with an air pump or an external air compressor, an output port of the main tank 221 is communicated with the sub-tank 222, a pipeline connecting the main tank 221 and the sub-tank 222 is provided with an electromagnetic valve A, an output port of the sub-tank 222 is communicated with the high-pressure gas nozzle 21, and pipelines connecting the sub-tank 222 and the high-pressure gas nozzle 21 are provided with an electromagnetic valve B;

the main tank 221 and the sub-tank 222 are each provided therein with a gas pressure sensor 223.

The moving module 23 includes: the X-axis nut screw rod, the Y-axis nut screw rod, the Z-axis nut screw rod and the stepping motor are arranged on the base; the X-axis nut screw comprises: x lead screw and X ball nut, Y axle nut lead screw includes: y lead screw and Y ball nut, Z axle nut lead screw includes: a Z screw rod and a Z ball nut,

the X lead screw is horizontally fixed above the conical cavity 11, one end of the Y lead screw is fixedly connected with the X ball nut, the other end of the Y lead screw is fixedly connected with a sliding block of the X lead screw parallel sliding rail, the Y lead screw is perpendicular to the X lead screw, the Z lead screw is vertically arranged on the Y ball nut, the high-pressure gas spray head 21 is fixed on the Z ball nut, the number of the stepping motors is three, and the three stepping motors are coaxially and fixedly connected with the X lead screw, the Y lead screw and the Z lead screw in a one-to-one correspondence manner.

The dust collection module 3 includes: the air blower 31 and the water tank 32, the inlet of the air blower 31 is communicated with the through hole, the outlet of the air blower 31 is communicated with the bottom of the water tank 32, and the water tank 32 is filled with liquid;

and an air negative pressure detection sensor 33 is arranged on a pipeline for communicating the fan 31 with the through hole.

The high-pressure blowing and ash removing device for the postprocessor further comprises an electronic scale, and the electronic scale is used for mass before and after the DPF postprocessor is blown.

The high-pressure blowing and ash removing device for the post-processor further comprises a control module, wherein the control module comprises: the emergency stop control system comprises a control center, a display panel, a power supply, a start button and an emergency stop button; the control center is respectively and electrically connected with the three stepping motors, the fan 31, the display panel, the light source 42 and the light intensity sensor 43, the power supply provides power for the high-pressure blowing and dust removing device of the post-processor, and the starting button and the emergency stop button are arranged on a power supply bus.

The light source 42 is a light emitting diode.

The fan 31 is a centrifugal fan 31.

The high-pressure gas source 22 includes: the high-pressure gas tank comprises a gas pump, a high-pressure gas tank and a safety valve, wherein a gas inlet of the high-pressure gas tank is communicated with the gas pump, a gas outlet of the high-pressure gas tank is communicated with a high-pressure gas nozzle 21 through a hose, and the safety valve is further arranged on the high-pressure gas tank to prevent the internal pressure of the high-pressure gas tank from being too large.

The hose is also provided with an electromagnetic valve, and the electromagnetic valve is electrically connected with the control center.

The control center is a PLC or a singlechip.

The high-pressure purging device is characterized in that a control module is arranged on one side of the high-pressure purging module 2, an ash collecting module 3 is arranged below the high-pressure purging module 2, and a light detection module 4 is arranged in the rear space of the control module.

The specific implementation manner of this embodiment is as follows:

DPF cools down after the electric oven toasts, and DPF can weigh before the clearance, then places on supporting base 41, and DPF edge and sealed pad in close contact with ensure that DPF center aligns with the through-hole center, provides the DPF parameter to the system through display panel: including DPF height and size, start high pressure and sweep module 2, high-pressure gas source 22 provides high-pressure gas flow for high-pressure gas shower nozzle 21, can set for main jar 221 and sub-jar 222 internal pressure in advance through control module, compare main jar 221 and sub-jar 222 with the setting value with the gas pressure sensor perception, and then control solenoid valve A and solenoid valve B open and close, it is specific: the pressure of the main tank 221 is greater than that of the sub-tank 222, when the high-pressure gas sprayer 21 works, the sub-tank 222 instantly discharges gas through the high-pressure gas sprayer 21 to achieve the purpose of high-pressure purging, at the moment, the moving module 23 drives the high-pressure gas sprayer 21 to enter the next working position, in the gap, the main tank 221 instantly supplements the pressure to the sub-tank 222, after the sub-tank 222 reaches the set pressure, the main tank 221 stops supplying gas to the sub-tank 222, the sub-tank 222 enters the working state again, the main tank 221 supplements the gas in the working process of the high-pressure gas sprayer 21, and repeated actions are achieved.

The moving module 23 controls the high-pressure gas nozzle 21 to purge on the DPF in sequence, simultaneously starts a fan, discharges ash to the water tank 32, the conical cavity 11 forms negative pressure under the action of the fan, the numerical value of the air negative pressure detection sensor 33 can directly reflect the dredging state of the DPF, in addition, the DPF can be weighed again after the completion to judge the ash removal quality, and the DPF can be placed in the optical detection module 4 to observe and judge the dredging effect of the DPF hole through the light intensity sensor 43.

The above embodiments are merely illustrative of the principles of the present invention and its effects, and do not limit the present invention. It will be apparent to those skilled in the art that modifications and improvements can be made to the above-described embodiments without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications or changes be made by those skilled in the art without departing from the spirit and technical spirit of the present invention, and be covered by the claims of the present invention.