A self-cleaning system for a waste gas treatment box of a mine-used explosion-proof diesel engine trackless rubber-tyred vehicle

Abstract

The present application belongs to the technical field of exhaust treatment of explosion-proof diesel engine, and particularly relates to a self-cleaning system for an exhaust treatment box of a mine-used explosion-proof diesel engine trackless rubber-tyred vehicle; the system comprises an exhaust treatment box, a function switching valve and a gas source; the exhaust treatment box comprises an exhaust gas inlet pipe, a sludge discharge outlet and a gas discharge outlet, and a pneumatic control stop valve is installed on the sludge discharge outlet; a working port of the function switching valve is connected with the gas source, and two control ports of the function switching valve are respectively connected with an automatic cleaning valve assembly and the pneumatic control stop valve; the automatic cleaning valve assembly is controlled to open and close by a sludge weight feedback assembly in the exhaust treatment box, and the automatic cleaning valve assembly is connected with the pneumatic control stop valve; the self-cleaning system for the exhaust treatment box of the mine-used explosion-proof diesel engine trackless rubber-tyred vehicle can automatically judge the accumulation of sludge in the exhaust treatment box, realize sludge sedimentation, automatically adjust discharge according to the deposition amount of the sludge, and keep the inside of the exhaust treatment box clean.

Description

Technical Field

[0001] This invention belongs to the field of explosion-proof diesel engine exhaust gas treatment technology, specifically relating to a self-cleaning system for the exhaust gas treatment box of a trackless rubber-wheeled vehicle for mining explosion-proof diesel engines. Background Technology

[0002] The exhaust gas treatment box is a crucial component of trackless rubber-tired mining vehicles equipped with explosion-proof diesel engines. Its primary function is to treat the exhaust gases emitted by the diesel engine, providing physical cooling, dust suppression, and carbon deposit capture. However, during use, we have found that carbon deposits and unburned diesel fuel within the exhaust gas treatment box, after being vigorously agitated with water, easily form highly viscous sludge. This sludge can clog the exhaust pipes of the exhaust gas treatment box during actual production, leading to high engine temperatures and affecting the sensing accuracy of the electrical sensors inside the box. Currently, the main method to address this issue is for the driver to manually clean the exhaust gas treatment box daily. This not only increases the labor intensity for workers but may also threaten the system performance of the explosion-proof diesel engine.

[0003] To solve the above problems, there is an urgent need to develop a self-cleaning system for the exhaust gas treatment box of a mine explosion-proof diesel engine trackless rubber-wheeled vehicle. Summary of the Invention

[0004] This invention aims to solve the problem of difficult-to-treat sludge formed by carbon deposits and incompletely burned diesel fuel in the exhaust gas treatment box of trackless rubber-tired mining vehicles with explosion-proof diesel engines.

[0005] This invention provides the following technical solution: a self-cleaning system for the exhaust gas treatment box of a mine explosion-proof diesel engine trackless rubber-tired vehicle, comprising an exhaust gas treatment box, a function switching valve, and an air source;

[0006] The exhaust gas treatment box includes an exhaust gas inlet pipe, an oil sludge outlet, and a gas outlet. A pneumatic shut-off valve is installed on the oil sludge outlet.

[0007] The working port of the function switching valve is connected to the air source, and the two control ports of the function switching valve are connected to the automatic cleaning valve assembly and the pneumatic shut-off valve, respectively.

[0008] The automatic cleaning valve assembly is controlled to open and close by the sludge weight feedback component in the exhaust gas treatment box. The automatic cleaning valve assembly is connected to the pneumatic shut-off valve.

[0009] The pneumatic shut-off valve has three modes: normally closed, normally open, and automatic on / off. When the function switching valve is in the neutral position, the pneumatic shut-off valve is in the normally closed mode. When the function switching valve is in the left position, the pneumatic shut-off valve is controlled by the automatic cleaning valve assembly and is in the automatic on / off mode. When the function switching valve is in the right position, the pneumatic shut-off valve is in the normally open mode.

[0010] Furthermore, the exhaust gas treatment box is equipped with a water replenishment mechanism and an oil sludge precipitant replenishment mechanism; both the water replenishment mechanism and the oil sludge precipitant replenishment mechanism are connected to an air source, and both are driven by pressurized gas from the air source; the water replenishment mechanism and the oil sludge precipitant replenishment mechanism are controlled to start and stop by a float switch inside the exhaust gas treatment box.

[0011] Furthermore, a lower sleeve is installed outside the outlet of the exhaust gas inlet pipe in the exhaust gas treatment box, and an upper sleeve is installed outside the outlet of the lower sleeve. The exhaust gas discharged from the exhaust gas inlet pipe enters the exhaust gas treatment box through the annular space gap between the exhaust gas inlet pipe and the lower sleeve, and the annular space gap between the upper sleeve and the lower sleeve.

[0012] Furthermore, the float switch includes a first float and a two-position two-way control valve A; the water outlet pipe of the water replenishment mechanism and the liquid outlet pipe of the sludge precipitant replenishment mechanism are connected to the inlet of the two-position two-way control valve A; the first float is connected to the control mechanism of the two-position two-way control valve A, and the first float controls the on / off state of the two-position two-way control valve A according to the water level change in the waste gas treatment box.

[0013] Furthermore, the sludge weight feedback assembly includes a sludge pressure plate and a two-position two-way control valve B;

[0014] The sludge press plate is located at the bottom of the exhaust gas treatment box. The sludge press plate is connected to the control mechanism of the two-position two-way control valve B. A spring is connected between the sludge press plate and the exhaust gas treatment box. The spring pushes the sludge press plate upward to close the two-position two-way control valve B. After the sludge press plate is pressed down by the sludge, the two-position two-way control valve B opens.

[0015] The automatic cleaning valve assembly includes a water tank, a second float, and a two-position two-way control valve C. The water tank is located outside the exhaust gas treatment box. The outlet of the water tank and the two-position two-way control valve B are connected. A normally open third adjustable flow valve is installed at the bottom of the water tank. The second float is connected to the control mechanism of the two-position two-way control valve C. The inlet of the two-position two-way control valve C is connected to an air source, and the outlet is connected to a pneumatic shut-off valve. The flow velocity difference between the water inlet of the water tank and the water outlet of the third adjustable flow valve causes water to accumulate in the water tank, which drives the second float to float and control the on / off state of the two-position two-way control valve C.

[0016] Furthermore, the water replenishment mechanism includes a water replenishment tank, which is connected to an air source. The water outlet pipe of the water replenishment tank is connected to the exhaust gas treatment box after passing through a first adjustable flow valve, a first check valve, and a two-position two-way control valve in sequence.

[0017] Furthermore, the sludge precipitant replenishment mechanism includes a sludge precipitant tank, which is connected to an air source. The outlet pipe of the sludge precipitant tank is connected to the exhaust gas treatment box after passing through a second adjustable flow valve, a second check valve, and a two-position two-way control valve in sequence.

[0018] Furthermore, after passing through the safety pressure reducing valve assembly, the gas source splits into two branches that connect to the water replenishment mechanism and the sludge precipitant replenishment mechanism, respectively.

[0019] Furthermore, the safety pressure reducing valve assembly includes a pressure reducing valve, a pressure gauge, a third check valve, and a relief valve. The pressure reducing valve is used to reduce the air pressure of the air source and output it through the third check valve. The pressure gauge is connected between the pressure reducing valve and the third check valve, and a relief valve is installed after the third check valve.

[0020] Furthermore, the function switching valve is a three-position three-way manual control valve.

[0021] Compared with the prior art, the advantages of the present invention are:

[0022] This invention provides a self-cleaning system for the exhaust gas treatment box of a trackless rubber-tired mine explosion-proof diesel engine. This system can automatically detect the accumulation of sludge inside the exhaust gas treatment box and facilitate sludge settling. Simultaneously, it automatically adjusts the discharge based on the amount of sludge deposited, maintaining the cleanliness of the liquid inside the exhaust gas treatment box. This ensures that relevant components operate in a good environment, thereby reducing human intervention and lowering the labor intensity of workers. Attached Figure Description

[0023] Figure 1 A schematic diagram of the self-cleaning system for the exhaust gas treatment box of a trackless rubber-tired vehicle with an explosion-proof diesel engine used in mining.

[0024] Figure 2 This is a perspective view of the exhaust gas treatment box;

[0025] Figure 3 This is a cross-sectional view of the exhaust gas treatment box.

[0026] In the diagram: 1-Air source; 2-Function switching valve; 3-Waste gas treatment box; 31-Pneumatic shut-off valve; 32-Float switch; 321-First float; 322-Two-position two-way control valve A; 33-Automatic cleaning valve assembly; 331-Sludge pressure plate; 332-Two-position two-way control valve B; 333-Second float; 334-Third adjustable flow valve; 335-Two-position two-way control valve C; 34-Waste gas inlet pipe; 35-Explosion-proof fence seat; 36-Lower sleeve; 37-Upper sleeve; 4-Safety pressure reducing valve assembly; 41-Pressure reducing valve; 42-Pressure gauge; 43-Third check valve; 44-Relief valve; 5-Water replenishment tank; 6-Sludge settling agent tank; 7-First adjustable flow valve; 8-Second adjustable flow valve; 9-First check valve; 10-Second check valve. Detailed Implementation

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] like Figure 1 , Figure 2 , Figure 3 As shown: A self-cleaning system for exhaust gas treatment box of a trackless rubber-tired vehicle with explosion-proof diesel engine for mining, including exhaust gas treatment box 3, function switching valve 2 and air source 1;

[0029] Gas source 1 is taken from the gas tank of the trackless rubber-tired vehicle of the mine explosion-proof diesel engine, and the gas pressure should be maintained at 7 bar ± 0.5 bar;

[0030] The exhaust gas treatment box 3 is used to perform explosion-proof and cleaning treatment on the exhaust gas emitted by the explosion-proof diesel engine trackless rubber-tired vehicle.

[0031] The exhaust gas treatment box 3 includes an exhaust gas inlet pipe 34, an oil sludge outlet and a gas outlet. The outlet of the exhaust gas inlet pipe 34 is located below the liquid level of the exhaust gas treatment box 3, and the gas outlet is located at the top of the exhaust gas treatment box 3. The exhaust gas enters from the exhaust gas inlet pipe 34, is treated by water and then discharged from the top of the exhaust gas treatment box 3. A pneumatic shut-off valve 31 is installed on the oil sludge outlet. The flow diameter of the pneumatic shut-off valve 31 is 50mm or more, which can ensure that the oil sludge is discharged quickly.

[0032] The working port of the function switching valve 2 is connected to the air source 1, and the two control ports of the function switching valve 2 are respectively connected to the automatic cleaning valve assembly 33 and the pneumatic shut-off valve 31.

[0033] The automatic cleaning valve assembly 33 is controlled to open and close by the sludge weight feedback component in the exhaust gas treatment box 3, and the automatic cleaning valve assembly 33 is connected to the pneumatic shut-off valve 31.

[0034] Function switching valve 2 is a three-position three-way manual control valve. Function switching valve 2 controls the wastewater discharge status of exhaust gas treatment box 3 by switching positions. Pneumatic shut-off valve 31 can be driven by air source 1 to achieve the closing function by function switching valve 2 or automatic cleaning valve assembly 33. Pneumatic shut-off valve 31 has three modes: normally closed, normally open, and automatic on / off. When function switching valve 2 is in the middle position, pneumatic shut-off valve 31 is in the normally closed mode. When function switching valve 2 is in the left position, pneumatic shut-off valve 31 is controlled by automatic cleaning valve assembly 33 to be in the automatic on / off mode. When function switching valve 2 is in the right position, pneumatic shut-off valve 31 is in the normally open mode.

[0035] The exhaust gas treatment box 3 is equipped with a water replenishment mechanism and an oil sludge precipitant replenishment mechanism; both the water replenishment mechanism and the oil sludge precipitant replenishment mechanism are connected to the air source 1, and both are driven by the pressurized gas of the air source 1; the water replenishment mechanism and the oil sludge precipitant replenishment mechanism are controlled to start and stop by the float switch 32 in the exhaust gas treatment box 3.

[0036] The exhaust gas treatment box 3 is made of 304 stainless steel with strong corrosion resistance. A lower sleeve 36 is installed outside the outlet of the exhaust gas inlet pipe 34 in the exhaust gas treatment box 3, and an upper sleeve 37 is installed outside the outlet of the lower sleeve 36. The exhaust gas discharged from the exhaust gas inlet pipe 34 enters the exhaust gas treatment box 3 through the annular space gap between the exhaust gas inlet pipe 34 and the lower sleeve 36, and the annular space gap between the upper sleeve 37 and the lower sleeve 36. The upper sleeve 37 and the lower sleeve 36 slow down the exhaust gas flow rate discharged from the exhaust gas inlet pipe 34 and prevent the exhaust gas from disturbing the liquid inside the exhaust gas treatment box 3.

[0037] The top of the exhaust gas treatment box 3 is equipped with an explosion-proof fence seat 35 for installing explosion-proof fences.

[0038] The float switch 32 includes a first float 321 and a two-position two-way control valve A322; the water outlet pipe of the water replenishment mechanism and the liquid outlet pipe of the sludge precipitant replenishment mechanism are connected to the inlet of the two-position two-way control valve A322; the first float 321 is connected to the control mechanism of the two-position two-way control valve A322, and the first float 321 controls the on / off state of the two-position two-way control valve A322 according to the water level change in the waste gas treatment box 3.

[0039] The sludge weight feedback component includes a sludge pressing plate 331 and a two-position two-way control valve B332. The sludge pressing plate 331 is located at the bottom of the exhaust gas treatment box 3. The sludge pressing plate 331 is connected to the control mechanism of the two-position two-way control valve B332. A spring connects the sludge pressing plate 331 and the exhaust gas treatment box 3. When sludge is deposited on the sludge pressing plate 331 (reaching the preset weight), the sludge pressing plate 331 is pressed down by the sludge, and the two-position two-way control valve B332 opens. When the sludge decreases, the sludge pressing plate 331 moves upward under the action of the spring, thereby driving the two-position two-way control valve B332 to close.

[0040] The automatic cleaning valve assembly 33 includes a water tank, a second float 333, and a two-position two-way control valve C335. The water tank is located outside the exhaust gas treatment box 3. The water tank is connected to the outlet of the two-position two-way control valve C332. A normally open third adjustable flow valve 334 is installed at the bottom of the water tank. The second float 333 is connected to the control mechanism of the two-position two-way control valve C335. The inlet of the two-position two-way control valve C335 is connected to the air source 1, and the outlet is connected to the air-controlled shut-off valve 31. The flow rate difference between the water inlet of the water tank and the water outlet of the third adjustable flow valve 334 causes water to accumulate in the water tank, which drives the second float 333 to float and control the on / off state of the two-position two-way control valve C335. The flow rate adjustment value of the third adjustable flow valve 334 is 0.3 to 0.5 times the flow rate value of the two-position two-way control valve C335.

[0041] When the pneumatic shut-off valve 31 is in automatic switching mode, and the sludge deposited on the sludge pressing plate 331 presses it down, it indicates that there is a lot of sludge in the exhaust gas treatment box 3 and it needs to be discharged. The downward movement of the sludge pressing plate 331 triggers the opening of the two-position two-way control valve C335. The liquid in the exhaust gas treatment box 3 enters the water tank of the automatic cleaning valve assembly 33 through the connecting pipe. At this time, the inlet water flow rate in the water tank is greater than the outlet water flow rate of the third adjustable flow valve 334, and the water level in the water tank rises, carrying... The second float 333 rises, controlling the opening of the two-position two-way control valve C335. High-pressure gas from gas source 1 flows through the two-position two-way control valve C335 to the pneumatic shut-off valve 31, which opens to discharge sludge. As the sludge at the bottom of the waste gas treatment tank 3 is emptied, the sludge pressure plate 331 moves upward under the action of a spring, thereby closing the two-position two-way control valve B332. This cuts off the gas supply at the pneumatic shut-off valve 31, and the valve closes, completing the automatic sludge discharge process for the waste gas treatment tank 3. After the liquid level in the waste gas treatment tank 3 drops, it is replenished through a water replenishment mechanism and a sludge settling agent replenishment mechanism.

[0042] The water replenishment mechanism includes a water replenishment tank 5, which is used to store water for the exhaust gas treatment box 3. The water replenishment tank 5 is connected to the gas source 1. The water outlet pipe of the water replenishment tank 5 is connected to the exhaust gas treatment box 3 after passing through the first adjustable flow valve 7, the first one-way valve 9 and the two-position two-way control valve A322 in sequence.

[0043] The sludge precipitant replenishment mechanism includes a sludge precipitant tank 6, which is used to store liquid agents for precipitating sludge. The sludge precipitant tank 6 is connected to the gas source 1. The liquid outlet pipe of the sludge precipitant tank 6 is connected to the waste gas treatment box 3 after passing through the second adjustable flow valve 8, the second one-way valve 10 and the two-position two-way control valve A322 in sequence.

[0044] The setting ratio of the first adjustable flow valve 7 and the second adjustable flow valve 8 is set according to the water-to-soil ratio of the sludge precipitant.

[0045] After the liquid level in the exhaust gas treatment tank 3 decreases, the first float ball 321 triggers the two-position two-way control valve A322 to open. Driven by air pressure, the stored water in the water replenishment tank 5 flows into the exhaust gas treatment tank 3 sequentially through the first adjustable flow valve 7, the first check valve 9, and the two-position two-way control valve A322. The agent in the sludge precipitant tank 6 flows into the exhaust gas treatment tank 3 sequentially through the second adjustable flow valve 8, the second check valve 10, and the two-position two-way control valve A322, interacting with the mixed liquid inside and causing the suspended sludge to settle. After the liquid level in the exhaust gas treatment tank 3 rises, the first float ball 321 triggers the two-position two-way control valve A322 to close, the water replenishment tank 5 stops adding water, and the sludge precipitant tank 6 stops adding chemicals.

[0046] The first check valve 9 and the second check valve 10 are installed to prevent the water replenishment tank 5 and the sludge settling agent tank 6 from communicating with each other.

[0047] After passing through the safety pressure reducing valve assembly 4, the gas source 1 is divided into two branches that are connected to the water replenishment mechanism and the sludge precipitant replenishment mechanism, respectively. The safety pressure reducing valve assembly 4 is used to process the high-pressure gas from the gas source 1 to provide driving force for the water replenishment mechanism and the sludge precipitant replenishment mechanism.

[0048] The safety pressure reducing valve assembly 4 includes a pressure reducing valve 41, a pressure gauge 42, a third check valve 43, and a relief valve 44. The pressure reducing valve 41 reduces the air pressure of the air source 1 and outputs it through the third check valve 43. The pressure gauge 42 is connected between the pressure reducing valve 41 and the third check valve 43. The relief valve 44 is installed after the third check valve 43. The pressure reducing valve 41 reduces the air pressure of the air source 1 to 0.3 bar ± 0.05 bar and outputs it through the third check valve 43. The pressure gauge 42 is designed to detect the working status of the pressure reducing valve 41. To prevent air pressure changes caused by temperature changes in the water supply tank 5 and the sludge settling agent tank 6, the relief valve 44 is installed after the third check valve 43. The set value of the relief valve 44 is between 0.4 bar and 0.45 bar.

[0049] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A self-cleaning system for the exhaust gas treatment box of a trackless rubber-tired vehicle with an explosion-proof diesel engine used in mining, characterized in that: It includes an exhaust gas treatment box (3), a function switching valve (2), and an air source (1); The exhaust gas treatment box (3) includes an exhaust gas inlet pipe (34), an oil sludge outlet and a gas outlet, and an air-controlled shut-off valve (31) is installed on the oil sludge outlet. The working port of the function switching valve (2) is connected to the air source (1), and the two control ports of the function switching valve (2) are connected to the automatic cleaning valve assembly (33) and the pneumatic shut-off valve (31) respectively. The automatic cleaning valve assembly (33) is controlled to open and close by the sludge weight feedback component in the exhaust gas treatment box (3), and the automatic cleaning valve assembly (33) is connected to the pneumatic shut-off valve (31); The pneumatic shut-off valve (31) has three modes: normally closed, normally open, and automatic switching. When the function switching valve (2) is in the middle position, the pneumatic shut-off valve (31) is in the normally closed mode. When the function switching valve (2) is in the left position, the pneumatic shut-off valve (31) is controlled by the automatic cleaning valve assembly (33) to be in the automatic switching mode. When the function switching valve (2) is in the right position, the pneumatic shut-off valve (31) is in the normally open mode.

2. The self-cleaning system for the exhaust gas treatment box of a trackless rubber-tired vehicle with explosion-proof diesel engine for mining, as described in claim 1, is characterized in that: The exhaust gas treatment box (3) is equipped with a water replenishment mechanism and an oil sludge precipitant replenishment mechanism; both the water replenishment mechanism and the oil sludge precipitant replenishment mechanism are connected to the gas source (1), and the pressurized gas of the gas source (1) is used as the driving force; the water replenishment mechanism and the oil sludge precipitant replenishment mechanism are controlled to start and stop by the float switch (32) in the exhaust gas treatment box (3).

3. The self-cleaning system for the exhaust gas treatment box of a trackless rubber-tired vehicle for explosion-proof diesel engines in mining, as described in claim 2, is characterized in that: The exhaust gas treatment box (3) has a lower sleeve (36) outside the outlet of the exhaust gas inlet pipe (34) and an upper sleeve (37) outside the outlet of the lower sleeve (36). The exhaust gas discharged from the exhaust gas inlet pipe (34) enters the exhaust gas treatment box (3) through the annular space gap between the exhaust gas inlet pipe (34) and the lower sleeve (36) and the annular space gap between the upper sleeve (37) and the lower sleeve (36).

4. The self-cleaning system for the exhaust gas treatment box of a trackless rubber-tired vehicle for explosion-proof diesel engines in mining, as described in claim 3, is characterized in that: The float switch (32) includes a first float (321) and a two-position two-way control valve A (322); the water outlet pipe of the water replenishment mechanism and the liquid outlet pipe of the sludge precipitant replenishment mechanism are connected to the inlet of the two-position two-way control valve A (322); the first float (321) is connected to the control mechanism of the two-position two-way control valve A (322), and the first float (321) controls the on / off state of the two-position two-way control valve A (322) according to the water level change in the waste gas treatment box (3).

5. The self-cleaning system for the exhaust gas treatment box of a trackless rubber-tired vehicle for explosion-proof diesel engines in mining, as described in claim 3, is characterized in that: The sludge weight feedback component includes a sludge pressure plate (331) and a two-position two-way control valve B (332). The sludge press plate (331) is located at the bottom of the exhaust gas treatment box (3). The sludge press plate (331) is connected to the control mechanism of the two-position two-way control valve B (332). A spring is connected between the sludge press plate (331) and the exhaust gas treatment box (3). The spring pushes the sludge press plate (331) upward to close the two-position two-way control valve B (332). After the sludge press plate (331) is pressed down by the sludge, the two-position two-way control valve B (332) opens. The automatic cleaning valve assembly (33) includes a water tank, a second float (333) and a two-position two-way control valve C (335); the water tank is located outside the exhaust gas treatment box (3); the outlet of the water tank and the two-position two-way control valve B (332) are connected; a normally open third adjustable flow valve (334) is provided at the bottom of the water tank; the second float (333) is connected to the control mechanism of the two-position two-way control valve C (335); the inlet of the two-position two-way control valve C (335) is connected to the air source (1), and the outlet is connected to the air-controlled shut-off valve (31); the flow rate difference between the water inlet of the water tank and the water outlet of the third adjustable flow valve (334) causes water to be stored in the water tank, which drives the second float (333) to float and control the on / off state of the two-position two-way control valve C (335).

6. The self-cleaning system for the exhaust gas treatment box of a trackless rubber-tired vehicle with explosion-proof diesel engine for mining, as described in claim 4, is characterized in that: The water replenishment mechanism includes a water replenishment tank (5), which is connected to an air source (1). The water outlet pipe of the water replenishment tank (5) passes through a first adjustable flow valve (7), a first one-way valve (9), and a two-position two-way control valve A (322) in sequence before being connected to the waste gas treatment box (3).

7. The self-cleaning system for the exhaust gas treatment box of a trackless rubber-tired vehicle for explosion-proof diesel engines in mining, as described in claim 4, is characterized in that: The oil sludge precipitant replenishment mechanism includes an oil sludge precipitant tank (6), which is connected to an air source (1). The outlet pipe of the oil sludge precipitant tank (6) is connected to the waste gas treatment box (3) after passing through the second adjustable flow valve (8), the second check valve (10), and the two-position two-way control valve A (322).

8. The self-cleaning system for the exhaust gas treatment box of a trackless rubber-tired vehicle with explosion-proof diesel engine for mining, as described in claim 2, is characterized in that: The gas source (1) is connected to the water replenishment mechanism and the sludge precipitant replenishment mechanism respectively via two branches after passing through the safety pressure reducing valve assembly (4).

9. The self-cleaning system for the exhaust gas treatment box of a trackless rubber-tired vehicle for explosion-proof diesel engines in mining, as described in claim 8, is characterized in that: The safety pressure reducing valve assembly (4) includes a pressure reducing valve (41), a pressure gauge (42), a third check valve (43), and an overflow valve (44). The pressure reducing valve (41) is used to reduce the pressure of the gas source (1) and output it through the third check valve (43). The pressure gauge (42) is connected between the pressure reducing valve (41) and the third check valve (43). An overflow valve (44) is provided after the third check valve (43).

10. The self-cleaning system for the exhaust gas treatment box of a trackless rubber-tired vehicle for explosion-proof diesel engines in mining, as described in claim 1, is characterized in that: The function switching valve (2) is a three-position three-way manual control valve.

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