Particulate matter loading device for particulate matter trap

Abstract

The utility model provides a particulate matter loading device for a particulate matter trap. The particulate matter loading device comprises an air compressor (1), an air inlet pipeline (8) and an air inlet branch pipeline (9), the air outlet end of the air compressor (1) is communicated with the air inlet pipeline (8); a particulate matter generator (2) and a heating component (3) are further sequentially arranged on the air inlet pipeline (8) in the flowing-out direction of air flow in the air inlet pipeline (8); the air inlet pipeline (8) is in airflow communication with the particulate matter generator (2) to form airflow carrying particulate matters; and the heating component (3) is used for providing a heating source for the air inlet pipeline. According to the particulate matter loading device provided by the utility model, particulate matters are loaded on the particulate matter trap, a regeneration test is carried out on the particulate matter trap after the particulate matters are loaded, in the loading process, the particulate matter concentration is relatively uniform, the air inlet flow is stable, the loading efficiency is high, and the development period is obviously shortened.

Description

Technical Field

[0001] This utility model relates to the field of motor vehicle exhaust gas treatment technology, and in particular to a particulate matter loading device for a particulate matter filter. Background Technology

[0002] With the growth of GDP, the search for efficient technologies to control vehicle emissions has become increasingly urgent.

[0003] Particulate filters effectively reduce particulate emissions from internal combustion engines. Depending on the engine type they are designed for, they can be categorized into diesel particulate filters (DPF) and gasoline particulate filters (GPF). Both types of particulate filters effectively reduce particulate emissions from internal combustion engines. During technology development, it is often necessary to fill the particulate filter with particulate matter, i.e., to perform particulate loading.

[0004] During the technology development process, it is necessary to fill the particulate filter with particles of different masses, i.e., to perform a particulate loading operation, in order to test the performance of the particulate filter. Currently, the common method is to use artificial particles (simulating soot, simulating ash) to simulate internal combustion engine particles and load them onto an integral particulate filter. After loading, the particulate filter is removed and placed on a test bench or vehicle to test its regeneration performance. From loading the particulate filter to testing its regeneration performance, the process needs to be completed on two separate devices, increasing the complexity of the experiment. Utility Model Content

[0005] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a particulate loading device that integrates the loading test and regeneration performance test of the particulate trap, so as to solve the problems in the prior art.

[0006] To achieve the above-mentioned and other related objectives, this utility model is obtained through the following technical solution.

[0007] This utility model provides a particulate loading device for a particulate matter trap, including an air compressor, an air intake pipe, and an air intake branch pipe; the outlet end of the air compressor is connected to the air intake pipe; along the airflow direction in the air intake pipe, a particulate generator and a heating element are sequentially arranged on the air intake pipe; the air intake pipe is in airflow communication with the particulate generator to form an airflow carrying particulate matter; the heating element is used to provide a heating source for the air intake pipe; the first end of the air intake branch pipe is in airflow communication with the outlet end of the air compressor, and the last end of the air intake branch pipe is in airflow communication with the air intake pipe located between the heating element and the particulate generator.

[0008] In a preferred embodiment, the particulate generator includes a container for holding particulate matter and a perforated tube disposed within the container; the perforated tube is a hollow tube, and its wall is provided with a plurality of through holes and / or through slits.

[0009] In a preferred embodiment, the air intake line includes an air supply section for supplying air to the particulate generator and an air outlet section for conveying the airflow carrying particulate matter.

[0010] In a preferred embodiment, along the axial extension direction of the hollow tube, the hollow tube includes an air inlet end and an air outlet end; the air inlet end of the hollow tube is in airflow communication with the air supply section of the air inlet pipeline, and the air outlet end of the hollow tube is a free end; the container is provided with a discharge port, and the discharge port is in airflow communication with the air outlet section of the air inlet pipeline.

[0011] In a preferred embodiment, the diameter d of the through hole on the perforated tube is 1~3mm.

[0012] In a preferred embodiment, the maximum size of the through-hole on the perforated tube is 1~3mm.

[0013] In a preferred embodiment, the surface of the through hole and / or the through slot occupies 5-15% of the wall area of ​​the perforated pipe.

[0014] In a preferred embodiment, the through holes and / or the through slots are uniformly distributed on the perforated tube.

[0015] In a preferred embodiment, an air filter is also included, which is disposed on the air intake line and located upstream of the particulate generator.

[0016] In a preferred embodiment, the intake pipe and the intake branch pipe are respectively equipped with a first flow meter and a second flow meter.

[0017] In a preferred embodiment, both the intake pipe and the intake branch pipe are equipped with a switching valve.

[0018] In a preferred embodiment, a temperature measuring component is further included, which is disposed on the air intake pipe and located downstream of the heating component.

[0019] This utility model provides a particulate loading device, which has the following beneficial effects:

[0020] 1. Load particulate matter into the particulate matter collector and conduct a regeneration test on the particulate matter collector after loading is completed;

[0021] 2. During the loading process, the particulate matter concentration is relatively uniform, the air intake flow is stable, the loading efficiency is high, and the development cycle is significantly shortened. Attached Figure Description

[0022] Figure 1 The diagram shown is a structural schematic of the particulate loading device for a particulate matter collector according to this invention.

[0023] Figure 2 The diagram shown is a structural schematic of a perforated tube.

[0024] Figure 3 The image shown is an enlarged view of the particulate matter generator.

[0025] Figure label:

[0026] 1. Air compressor;

[0027] 2. Particulate matter generator;

[0028] 3. Heating components;

[0029] 4. Particle trap;

[0030] 6. First flow meter;

[0031] 7. Second flow meter;

[0032] 8. Intake pipe;

[0033] 81 Gas Supply Section;

[0034] 82 Exhaust section;

[0035] 9. Intake branch piping;

[0036] 22. Perforated tube;

[0037] 11. Gradual-release diffuser;

[0038] 12. Gradient diffuser;

[0039] 13. Air filter;

[0040] 15 Temperature measuring components. Detailed Implementation

[0041] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0042] Please see Figures 1 to 3It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0043] like Figure 1 As shown, this utility model provides a particulate loading device for a particulate matter collector, including an air compressor 1, an air intake pipe 8, and an air intake branch pipe 9;

[0044] The air outlet of the air compressor 1 is connected to the air inlet pipe 8;

[0045] Along the airflow direction within the intake pipe 8, a particulate generator 2 and a heating element 3 are sequentially provided on the intake pipe 8; the intake pipe 8 and the particulate generator 2 are in airflow communication to form an airflow carrying particulate matter; the heating element 3 is used to provide a heating source for the intake pipe.

[0046] The first end of the intake branch pipe 9 is connected to the air outlet of the air compressor 1, and the last end of the intake branch pipe 9 is connected to the intake pipe 8 located between the heating component 3 and the particulate generator 2.

[0047] In the above embodiments, the intake pipe 8 of the particulate loading device is used to perform a loading test on the particulate trap. Specifically, after high-pressure airflow is output from the air compressor 1, it flows through the particulate generator 2, and the airflow carrying particulate matter is heated by the heating element 3. At this time, the heating temperature does not exceed 500℃, which is close to the exhaust gas temperature actually generated by the internal combustion engine of a motor vehicle. The intake branch pipe 9 is used to perform a regeneration test on the loaded particulate trap. Specifically, after high-pressure airflow is output from the air compressor 1, it enters the intake branch pipe 9 and is heated by the heating element 3. At this time, the heating temperature is above 600℃. The intake branch pipe 9 can also be used to purge the particulate trap 4 before the loading test, reducing the influence of other factors and facilitating the screening of the particulate trap 4. Therefore, the particulate loading device provided in this application can not only load the particulate trap but also perform subsequent regeneration tests.

[0048] In a like Figure 1 and 3 In the specific embodiment shown, the particulate generator 2 includes a container 21 for holding particulate matter and a perforated tube 22 disposed within the container; the perforated tube 22 is a hollow tube, and its wall is provided with a plurality of through holes and / or through slits. There are a plurality of perforated tubes 22, such as one, two, or three.

[0049] In a like Figure 1 and 3 In the specific embodiment shown, the air inlet pipe 8 includes an air supply section 81 for supplying air to the particulate generator 2 and an air outlet section 82 for conveying the airflow carrying particulate matter.

[0050] In a like Figure 1 and 3 In a more specific embodiment shown, along the axial extension direction of the hollow tube, the hollow tube includes an air inlet end and an air outlet end; the air inlet end of the hollow tube is in airflow communication with the air supply section 81 of the air inlet pipe 8, and the air outlet end of the hollow tube is a free end; the container 21 is provided with a discharge port, and the discharge port is in airflow communication with the air outlet section 82 of the air inlet pipe 8.

[0051] In the above embodiment, the high-pressure airflow passes through the perforated tube in the particulate generator 2. After the airflow that escapes from the through hole and / or through gap of the perforated tube carries the highly mobile particulate matter to be lifted, the airflow carrying the particulate matter flows out through the outlet section 82 of the air inlet pipe 8 and enters the heating component 3.

[0052] In a like Figure 2 In a more specific embodiment shown, the diameter d of the through hole on the perforated tube 22 is 1~3mm.

[0053] In a like Figure 2 In a more specific embodiment shown, the maximum size of the through-hole on the perforated tube 22 is 1~3mm.

[0054] In the above embodiments, by limiting the diameter, maximum size, and area ratio of the through holes and through gaps, it is ensured that the airflow escaping from the through holes and through gaps carries a certain pressure, which can lift the particles inside the particulate generator 2. The specific substance of the particulate matter, its approximate size range, and the filling amount range in the particulate generator 2 are also specified.

[0055] In a more specific embodiment, the surface of the through hole and / or the through slot occupies 5 to 15% of the wall area of ​​the perforated tube 22.

[0056] In the above embodiments, by limiting the area ratio of the through holes and through gaps, it is ensured that there is enough escaping airflow to fully lift the particles in the particulate generator 2, so that the concentration of particulate matter carried in the airflow is uniform.

[0057] In a like Figure 2 In a more specific embodiment shown, the through holes and / or the through slots are evenly distributed on the perforated tube 22.

[0058] In a like Figure 1 In the specific embodiment shown, an air filter 13 is also included, which is disposed on the air intake pipe 8 and located upstream of the particulate generator 2. An air filter 14 is used to filter the airflow. In this application, the air filter 14 can be a pre-filter, a medium-efficiency filter, a high-efficiency filter, a mechanical filter, a composite filter, or an electronic air filter.

[0059] In a like Figure 1 In the specific embodiment shown, a first flow meter 6 and a second flow meter 7 are respectively provided on the intake pipe 8 and the intake branch pipe 9. The first flow meter 6 and the second flow meter 7 are used to monitor the airflow rate in the intake pipe 8 and the intake branch pipe 9, respectively.

[0060] In a like Figure 1 In the specific embodiment shown, both the intake pipe 8 and the intake branch pipe 9 are equipped with switching valves. The switching valves are used to control the airflow in the intake pipe 8 and the intake branch pipe 9.

[0061] In a like Figure 1 In the specific embodiment shown, a temperature measuring component 15 is also included. The temperature measuring component 15 is disposed on the air inlet pipe 8 and located downstream of the heating component 3. The temperature measuring component 15 is used to measure the temperature of the heated airflow, and the temperature measuring component 15 may be a thermocouple.

[0062] In one specific embodiment, the particulate generator 2 is provided with a feed port and a sealing cap that matches the feed port. The feed port is used to add particulate matter, such as toner, into the particulate generator 2. After the addition is completed, the feed port is sealed to prevent the high-pressure airflow from carrying the particulate matter out of the feed port.

[0063] In a like Figure 1 In the specific embodiment shown, the two ends of the particle trap 4 are respectively connected to a gradually expanding diffuser 11 and a gradually contracting diffuser 12. The gradually expanding diffuser 11 and the gradually contracting diffuser 12 adjust the flow rate and pressure of the airflow by changing the cross-sectional area of ​​the pipes.

[0064] In a more specific embodiment, the two ends of the particle trap 4 are detachably connected to the expanding diffuser 11 and the contracting diffuser 12, respectively.

[0065] like Figure 1 The particulate loading device for the particulate trap shown below operates as follows:

[0066] 1. After adding particles into the particle generator 2, seal the feed port;

[0067] 2. Open the switch valve on the air filter 14 and the air intake pipe, turn on the air compressor 1 to output high-pressure airflow, and the filtered high-pressure airflow blows the particulate filter 4 along the air intake branch pipe 9.

[0068] 3. After purging, close the switch valve on the intake pipe and open the switch valve on the intake branch pipe 9. The high-pressure airflow, after being filtered, enters the particulate generator 2 along the intake pipe 8, raising the particulate matter and carrying it out. The airflow carrying the particulate matter is heated by the heating element 3 (heating temperature 500℃), and then collected by the particulate collector 4 before flowing out. The difference in mass of the particulate collector 4 before and after collection is weighed to determine whether the preset loading amount has been reached.

[0069] 4. After loading is completed, close the switch valve on the intake pipe and open the switch valve on the intake branch pipe 9. The high-pressure airflow enters the intake branch pipe 9 and is heated by the heating component 3 (heating temperature 650℃) before entering the particulate collector 4 for regeneration test.

[0070] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A particulate loading device for a particulate trap, characterized by, The air compressor (1), the air inlet pipeline (8) and the air inlet branch pipeline (9) are included. The air outlet end of the air compressor (1) is communicated with the air inlet pipeline (8). Along the air flow outflow direction in the air inlet pipeline (8), the air inlet pipeline (8) is further sequentially provided with a particulate generator (2) and a heating component (3); the air inlet pipeline (8) is in air flow communication with the particulate generator (2) to form an air flow carrying particulates; the heating component (3) is used for providing a heating source for the air inlet pipeline. The leading end of the air inlet branch pipeline (9) is in air flow communication with the air outlet end of the air compressor (1), and the trailing end of the air inlet branch pipeline (9) is communicated with the air inlet pipeline (8) between the heating component (3) and the particulate generator (2).

2. The particulate loading device of claim 1, wherein, The particulate generator (2) includes a containing part (21) for containing particulates and a perforated pipe (22) arranged in the containing part; the perforated pipe (22) is a hollow pipe, and a plurality of through holes and / or through slits are arranged on the pipe wall. And / or, the air inlet pipeline (8) includes a gas supply section (81) for supplying gas to the particulate generator (2) and an air outlet section (82) for conveying the air flow carrying particulates.

3. The particulate loading device of claim 2, wherein, Along the axial extension direction of the hollow pipe, the hollow pipe includes an air inlet end and an air outlet end; the air inlet end of the hollow pipe is in air flow communication with the gas supply section (81) of the air inlet pipeline (8), and the air outlet end of the hollow pipe is a free end. The containing part (21) is provided with a discharge port, and the discharge port is in air flow communication with the air outlet section (82) of the air inlet pipeline (8).

4. The particulate loading device of claim 2, wherein, The diameter d of the through hole on the perforated pipe (22) is 1-3 mm. The maximum size of the through slit on the perforated pipe (22) is 1-3 mm.

5. The particulate loading device of claim 2, wherein, The surface of the through hole and / or the through slit accounts for 5-15% of the pipe wall area of the perforated pipe (22).

6. The particulate loading device of claim 2, wherein, The through hole and / or the through slit are uniformly distributed on the perforated pipe (22).

7. The particulate loading device of claim 1, wherein, An air filter (13) is further included, which is arranged on the air inlet pipeline (8) and located upstream of the particulate generator (2).

8. The particulate loading device of claim 1, wherein, First and second flow meters (6) and (7) are respectively arranged on the air inlet pipeline (8) and the air inlet branch pipeline (9). Switch valves are arranged on the air inlet pipeline (8) and the air inlet branch pipeline (9).

9. The particulate loading device of claim 1, wherein, A charging port and a sealing cover matched with the charging port are arranged on the particulate generator (2).

10. The particulate loading device of claim 1, wherein, A temperature measuring component (15) is further included, which is arranged on the air inlet pipeline (8) and located downstream of the heating component (3).

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