CN213743735U

CN213743735U - Diesel engine EGR system particle filtering device with anti-blocking monitoring function

Info

Publication number: CN213743735U
Application number: CN202022240437.6U
Authority: CN
Inventors: 瞿磊; 冯伟杰; 方远�; 谢纬安; 樊登柱
Original assignee: Nantong Vocational College
Current assignee: Nantong Vocational College
Priority date: 2020-10-10
Filing date: 2020-10-10
Publication date: 2021-07-20
Anticipated expiration: 2030-10-10

Abstract

The utility model discloses a diesel engine EGR system particle filter with prevent stifled monitoring, including first air chamber, filter chamber and second air chamber, the filter chamber sets up inside first air chamber, and the second air chamber sets up the lower extreme at first air chamber, and filter chamber and second air chamber directly communicate, and the filter chamber lateral wall is the filter core installation room of fretwork, is equipped with the filter core in it, has seted up the gas outlet on the first air chamber, has seted up the air inlet on the second air chamber, still includes a gas pressure difference monitor, and two trachea of gas pressure difference monitor communicate with the inside of first air chamber and second air chamber respectively; on one hand, the device can effectively adsorb particulate matters in the recirculated exhaust gas, and prevent carbon deposition in the EGR cooler and the EGR valve, so that the cooling effect of the EGR cooler is reduced, the sealing of the EGR valve is failed and other faults are caused; on the other hand, particulate matters, unconventional emission pollutants and carbon monoxide in the recirculated exhaust gas can be prevented from reentering the cylinder to participate in combustion, so that the emission of particulate pollutants of the diesel engine is increased.

Description

Diesel engine EGR system particle filtering device with anti-blocking monitoring function

Technical Field

The utility model belongs to the technical field of diesel engine exhaust control and purifier, concretely relates to diesel engine EGR system particle filter equipment with prevent stifled monitoring.

Background

Exhaust Gas Recirculation (EGR) is a technical means for purifying in a diesel engine, an EGR system mainly comprises an EGR valve, an EGR cooler, an EGR pipeline and the like, and the EGR system has the function of reintroducing part of Exhaust Gas generated by combustion of the diesel engine into a cylinder to participate in next cycle combustion, so that the emission of nitrogen oxides of the diesel engine can be effectively reduced. Particulate matters in the recirculated exhaust gas can be attached to an EGR cooler pipeline and an EGR valve by the chilling effect of the EGR cooler, and after the EGR system is used for a long time, the EGR cooler pipeline and the EGR valve can generate obvious carbon deposition phenomena, so that the cooling effect of the EGR cooler is reduced, the sealing failure of the EGR valve and other phenomena cause the failure of the EGR system, and the emission of a diesel engine is deteriorated. In addition, particulate matter, unconventional exhaust pollutants, carbon monoxide, and the like in the recirculated exhaust gas reenter the cylinder to participate in combustion, resulting in increased diesel particulate emissions.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model provides a diesel engine EGR system particle filter equipment with prevent stifled monitoring. The device has the characteristics of low cost, small and exquisite structure, convenience in disassembly and assembly, convenience in maintenance and the like.

The utility model adopts the following technical scheme:

a diesel engine EGR system particle filtering device with anti-blocking monitoring function comprises a first air chamber, a gas filtering chamber and a second air chamber, wherein the gas filtering chamber is arranged in the first air chamber, the second air chamber is arranged at the lower end of the first air chamber, and the gas filtering chamber is directly communicated with the second air chamber;

the side wall of the air filtering chamber is a hollow filter element mounting chamber, and a filter element is arranged in the hollow filter element mounting chamber;

the first air chamber is provided with an air outlet, and the second air chamber is provided with an air inlet;

the gas pressure difference monitoring device further comprises a gas pressure difference monitor, and two gas tubes of the gas pressure difference monitor are respectively communicated with the interiors of the first gas chamber and the second gas chamber.

Further, a sealing gasket is used for sealing between the first air chamber and the second air chamber, and the first air chamber and the second air chamber are fixed through bolts.

Furthermore, the filter element is an active carbon filter screen.

Furthermore, the carrier of the active carbon filter screen is of an aluminum honeycomb structure.

Further, the air outlet is connected with an external cooler through a pipeline.

Further, the air inlet is connected with an exhaust valve of the diesel engine through a pipeline.

Furthermore, the second air chamber is of a structure with a large upper part and a small lower part, and the radius of the top circle of the circular truncated cone is 2 times that of the bottom circle.

The utility model has the advantages that:

1. the device can effectively adsorb particulate matters in the recirculated exhaust gas, and prevent carbon deposition in the EGR cooler and the EGR valve, so that the cooling effect of the EGR cooler is reduced, the sealing of the EGR valve is failed, and other faults are avoided;

2. particulate matter in the recirculated exhaust gas, unconventional emission pollutants and carbon monoxide are prevented from reentering the cylinder to participate in combustion, so that the emission of particulate pollutants of the diesel engine is increased;

3. after the waste gas flows into the second gas chamber, part of heavier particles in the waste gas can be deposited to the bottom of the second gas chamber under the action of gravity; in addition, when the diesel engine is in a running state, parts can vibrate along with the diesel engine, and particulate matters attached to the filter element can naturally fall to the bottom of the second air chamber under the vibration effect, so that the service cycle of the filter element is prolonged, and the use cost is reduced;

4. the device simple structure, convenient to detach make things convenient for the change of filter core, whether the gas pressure difference monitor in the device can effectively differentiate the filter core and take place to block up, can remind the user to change in time the filter core that has blockked up.

Drawings

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

FIG. 2 is an expanded view of the filter cartridge in an embodiment of the present invention;

fig. 3 is a schematic diagram of the position and operation process of an embodiment of the present invention on a diesel engine.

In the figure: 1. an air inlet; 2. a filter element; 3. a filter element installation chamber; 4. a first air chamber; 5. a gas filtering chamber; 6. an air outlet; 7. a differential gas pressure monitor; 8. a second air chamber.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in figure 1, the diesel engine EGR system particle filtering device with anti-blocking monitoring mainly comprises an air inlet 1, a filter element 2, a filter element installation chamber 3, a first air chamber 4, an air filtering chamber 5, an air outlet 6, a gas pressure difference monitor 7 and a second air chamber 8.

The second air chamber 8 is in a circular truncated cone structure, the circular radius of the top of the circular truncated cone is 2 times of the circular radius of the bottom of the circular truncated cone, and the top of the second air chamber 8 is completely connected with the bottom of the first air chamber 4, fixed by bolts and sealed by a sealing gasket; the lower left of the second air chamber 8 is provided with an air inlet 1.

The first air chamber 4 and the air filtering chamber 5 are integrated, the integral shape of the air filtering chamber 5 is a cylinder, the air filtering chamber is arranged in the first air chamber 4 and is separated by the filter element installation chamber 3, the filter element installation chamber 3 is used for installing the filter element 2, and an air outlet 6 is arranged at the upper right of the first air chamber 4; the central axes of the air inlet 1 and the air outlet 6 are positioned in the same vertical plane.

The filter element installation chamber 3 is used for installing the filter element 2, the filter element 2 is a hollow cylinder, the wall thickness of the filter element is about 2mm, and the filter element is a cuboid after being unfolded. As shown in fig. 2, the filter element 2 is an activated carbon filter screen, an aluminum honeycomb with a through hole structure is used as a carrier, the mesh number of the filter screen is 2000, and the filter screen is completely meshed with the inner wall of the filter element installation chamber 3; the highest temperature that the filter core 2 can bear is 700 ℃, can effectively adsorb the particulate matter in the waste gas, and also has certain filter effect to unconventional emission pollutant and carbon monoxide in the waste gas.

A gas pressure difference monitor 7 is arranged in the first gas chamber 4 and the second gas chamber 8 and used for monitoring the pressure difference between the first gas chamber 4 and the second gas chamber 8, and the monitoring precision can reach 0.1 kPa; when the pressure difference measured by the gas pressure difference monitor 7 is more than 5kPa, the blockage of the filter element 2 is indicated, and the filter element needs to be cleaned or replaced in time.

First air chamber 4 can separate with second air chamber 8, when filter core 2 takes place the jam, can disassemble first air chamber 4 and second air chamber 8 after the change of filter core 2 to clear up the carbon deposit of second air chamber 8 bottom deposit.

The position and the working schematic diagram of the particle filtering device of the diesel engine EGR system with the anti-blocking monitoring function on the diesel engine are shown in FIG. 3, the device is positioned between an exhaust valve and an EGR cooler, after exhaust gas generated by combustion of the diesel engine is exhausted through the exhaust valve, a part of the exhaust gas enters an air inlet 1 of the device through an exhaust pipe and reaches a second air chamber 8, and at the moment, heavier particles in the exhaust gas are deposited at the bottom of the second air chamber 8 under the action of self gravity; the waste gas goes up to reach the gas filtering chamber 5, is filtered by the filter element 2 on the wall surface of the gas filtering chamber 5, then reaches the first gas chamber 4, flows out from the gas outlet 6, and then sequentially enters the EGR cooler and the EGR valve, and the amount of the waste gas entering the cylinder is controlled by the EGR valve.

The filter element 2 can effectively adsorb particulate matters in the waste gas and has a certain filtering effect on unconventional discharged pollutants and carbon monoxide in the waste gas. In addition, when the diesel engine was in the running state, spare part can vibrate thereupon, and the particulate matter of attached to on the filter core 2 can drop to the 8 bottoms of second air chambers naturally under the vibration effect, helps prolonging the life cycle of filter core 2, reduces use cost. On one hand, the device can effectively adsorb particulate matters in the recirculated exhaust gas, and prevent carbon deposition in the EGR cooler and the EGR valve, so that the cooling effect of the EGR cooler is reduced, the sealing of the EGR valve is failed and other faults are caused; on the other hand, particulate matters, unconventional emission pollutants and carbon monoxide in the recirculated exhaust gas can be prevented from reentering the cylinder to participate in combustion, so that the emission of particulate pollutants of the diesel engine is increased.

It will be apparent to those skilled in the art that various modifications may be made to the above embodiments without departing from the general spirit and concept of the invention. Which all fall within the protection scope of the utility model. The protection scheme of the utility model is based on the appended claims.

Claims

1. A diesel engine EGR system particle filtering device with anti-blocking monitoring function comprises a first air chamber (4), an air filtering chamber (5) and a second air chamber (8), and is characterized in that the air filtering chamber (5) is arranged inside the first air chamber (4), the second air chamber (8) is arranged at the lower end of the first air chamber (4), and the air filtering chamber (5) is communicated with the second air chamber (8);

the side wall of the air filtering chamber (5) is a hollow filter element mounting chamber (3) in which a filter element (2) is arranged;

the first air chamber (4) is provided with an air outlet (6), and the second air chamber (8) is provided with an air inlet (1);

the gas pressure difference monitoring device further comprises a gas pressure difference monitor (7), and two gas tubes of the gas pressure difference monitor (7) are respectively communicated with the interiors of the first gas chamber (4) and the second gas chamber (8).

2. The diesel engine EGR system particle filtering device with anti-blocking monitoring function according to claim 1, characterized in that the first air chamber (4) and the second air chamber (8) are sealed by a sealing gasket and fixed by bolts.

3. The diesel engine EGR system particle filtering device with anti-blocking monitoring function according to claim 1, characterized in that the filter element (2) is an activated carbon filter screen.

4. The diesel engine EGR system particle filtering device with anti-blocking monitoring function of claim 3, wherein the carrier of the activated carbon filter screen is of an aluminum honeycomb structure.

5. The diesel engine EGR system particulate filter device with blockage prevention monitoring of claim 1, wherein the air outlet (6) is connected with an external cooler through a pipeline.

6. The diesel engine EGR system particulate filtering device with blockage prevention monitoring function according to claim 1, characterized in that the air inlet (1) is connected with a diesel engine exhaust valve through a pipeline.

7. The diesel engine EGR system particle filtering device with anti-blocking monitoring function according to claim 1, wherein the second air chamber (8) is of a structure with a big top and a small bottom, and the radius of the top circle of the circular truncated cone is 2 times that of the bottom circle of the circular truncated cone.