CN215444193U

CN215444193U - Diesel vehicle DPF regeneration detection device

Info

Publication number: CN215444193U
Application number: CN202120422797.XU
Authority: CN
Inventors: 陈毛毛; 孙丽媛
Original assignee: Jiangsu Tianlan Intelligent Equipment Co ltd
Current assignee: Jiangsu Tianlan Intelligent Equipment Co ltd
Priority date: 2021-02-25
Filing date: 2021-02-25
Publication date: 2022-01-07
Anticipated expiration: 2031-02-25

Abstract

The utility model discloses a detection device for DPF regeneration of a diesel vehicle, which comprises a weighing device and a drying and exhaust pressure detection device, wherein the weighing device is used for weighing a DPF carrier, the drying and exhaust pressure detection device comprises a fan, a first pressure controller, an air heater, a gas collection bag and a buffer tank, the fan is connected with the air heater, an air inlet of the DPF carrier is connected with the first pressure controller, the first pressure controller is respectively connected with the air heater and the gas collection bag, and an air outlet of the DPF carrier is connected with the buffer tank.

Description

Diesel vehicle DPF regeneration detection device

Technical Field

The utility model relates to a DPF regeneration detection device, in particular to a diesel vehicle DPF regeneration detection device.

Background

With the continuous emergence of new diesel vehicle emission laws and regulations, the requirements on the exhaust emission of the diesel vehicle are higher and higher, so that the loading particle trap (DPF) of the domestic diesel vehicle becomes a necessary trend. The DPF can collect more than 90% of soot generated by the diesel engine, and the emission of particulate matters is effectively reduced, so that the collected particulate matters block the pore channel to increase the exhaust back pressure after the DPF runs for a period of time, and the normal work of the engine can be influenced when the exhaust back pressure reaches a certain degree. At this time, the DPF needs to be regenerated to restore the engine to normal operation. At present, the regeneration of DPF at home and abroad is mainly divided into active regeneration and passive regeneration.

The active regeneration mainly ignites the carbon deposit on the surface of the DPF through oil injection ignition heating or other heating modes, and the method can slow down the DPF blockage to a certain extent. Because the DPF blockage contains non-combustible components, the efficiency is obviously reduced after multiple active regenerations, so that the system is frequently regenerated, and the DPF can be regenerated or directly scrapped only by other methods; meanwhile, uneven regeneration may occur in the active regeneration process, and improper operation can cause incomplete fuel combustion or local overheating due to the fact that the fuel is mainly heated and regenerated at present, so that DPF blockage or even burning is aggravated.

The passive regeneration is mainly to reduce the ignition point of the carbon deposit by adding fuel additive or coating catalyst on the surface of DPF carrier, and to remove the carbon deposit by oxidizing with other oxidation state waste gas in the tail gas. Due to the fact that non-combustible components exist in the DPF blockage, the DPF system can still be blocked after a certain time; the passive regeneration efficiency is mainly under the catalytic action of the catalyst, when a large amount of carbon deposit is accumulated on the surface of the catalyst, the active sites are reduced, the regeneration efficiency is reduced, the catalyst cannot be regenerated immediately after being blocked, the blocking phenomenon can be rapidly deteriorated, and meanwhile, the catalyst has a certain service life.

Although present regeneration mode can alleviate DPF's jam to a certain extent, can not solve DPF jam's difficult point completely, effect behind the DPF regeneration can not accurate detection, and the check out test set for DPF regeneration is urgent need, administers diesel vehicle tail gas and has great impetus.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model aims to provide a diesel vehicle DPF regeneration detection device which can intuitively detect pressure of DPF under different air quantities, quickly dry DPF carriers and effectively remove moisture contained in the carriers.

The technical scheme is as follows: the utility model discloses a detection device for diesel vehicle DPF regeneration, which comprises a weighing device and a drying and exhaust pressure detection device, wherein the weighing device is used for weighing a DPF carrier, the drying and exhaust pressure detection device comprises a fan, a first pressure controller, an air heater, a gas collection bag and a buffer tank, the fan is connected with the air heater, an air inlet of the DPF carrier is connected with the first pressure controller, the first pressure controller is respectively connected with the air heater and the gas collection bag, and an air outlet of the DPF carrier is connected with the buffer tank.

Further, the buffer tank comprises a cloth bag and a stainless steel tank, the cloth bag is arranged in the stainless steel tank, and a mouth of the cloth bag is connected with an air outlet of the DPF carrier. Preferably, the stainless steel tank is provided with a ball valve at the bottom of the side edge and has no upper cover surface and an inner volume of 40-200L.

Further, the cloth bag is a cotton cloth filter bag. The fan is a high-pressure fan. Preferably, the volume of the cotton cloth filter bag is completely expanded to be 40-200L, and the opening of the cloth bag is connected with the air outlet.

The gas collection bag is connected with external compressed air, and the gas collection bag is provided with a second pressure controller. Preferably, the volume range of the gas collection bag is 10-40L, and the outlet is connected with the gas inlet pipe of the sealing cover. The pressure controller ranges from 0 to 1.0 mpa.

Further, a sealing cover is arranged at an air inlet of the DPF carrier, and the sealing cover is connected with the first pressure controller and the lifting motor respectively.

The lifting motor is used for controlling the rising and falling of the sealing cover. The lower part of the sealing cover is provided with a sealing gasket, and the upper part is connected with an air inlet pipeline. The drying platform comprises a sealing gasket and an air outlet, and is used for placing the DPF. The sealing gasket is used for sealing the DPF pipeline. The gas outlet is used for discharging gas, has a diameter of 10-15cm, and is connected with the buffer tank.

The weighing device comprises a weight sensor, a weight display and a weighing platform, wherein the weighing platform is arranged under the DPF carrier, and the weighing platform is respectively connected with the weight sensor and the weight display.

Preferably, the weighing sensor is used for weighing in the range of 0-50kg with the accuracy of 0.1g and is used for detecting the weight of the DPF. The weight display is used to display the actual weight of the DPF being measured. The weighing platform is a stainless steel round table top, the diameter range of the weighing platform is 30-50cm, and the weighing platform is connected with the weight sensor and used for placing the DPF. The detection range of the gas flowmeter is 0-700m³And h, detecting the gas flow of the fan pipeline. The detection range of the pressure controller is 0-100kpa, the precision is 1pa, and the pressure controller is used for detecting the pressure inside the pipeline. The detection range of the pressure controller is 0-200 ℃, the precision is 0.1 ℃, and the pressure controller is used for detecting the temperature inside the pipeline.

The utility model relates to a detection method for diesel vehicle DPF regeneration, which utilizes a detection device for diesel vehicle DPF regeneration and comprises the following steps:

(1) weighing the DPF carrier for the first time before DPF regeneration;

(2) after the DPF is regenerated, connecting an air inlet of the DPF carrier with a first pressure controller, connecting an air outlet of the DPF carrier with a buffer tank, releasing gas in a gas collection bag, exhausting moisture in the DPF carrier, and enabling the moisture to enter the buffer tank from the air outlet of the DPF carrier;

(3) starting a fan and an air heater to blow and dry the DPF carrier, and when the first pressure controller displays a constant numerical value, the constant numerical value is the pressure difference of the front end and the rear end of the DPF under the current air quantity;

(4) and weighing the dried DPF carrier for the second time, and subtracting the weight obtained by weighing twice to obtain the weight difference before and after DPF regeneration.

The gas flow of the fan is 0-600m³And h, the maximum wind pressure of the fan is not lower than 30 kPa. The outlet of the fan is connected with the air heater.

When the flow of the fan is 30-80m³Maintaining the outlet temperature of the air heater not lower than 100 ℃ during the hour. The air heater is connected with the high-pressure fan and used for heating gas, and the outlet of the air heater is connected with the sealing cover air inlet pipe.

The detection device and the detection method are suitable for DPF regeneration including a cleaning step, and residual moisture in the cleaned DPF can be discharged and dried by utilizing a fan, an air heater, a gas collection bag, a buffer tank and the like.

Has the advantages that: compared with the prior art, the utility model has the following remarkable advantages: the high-pressure fan is adopted to simulate the air volume of the engine, so that the pressure of the DPF under different air volumes can be visually detected; the DPF carrier can be dried after the large-flow gas is heated quickly in a pipeline gas heating mode; high-pressure large-flow gas generated instantly after gas collection scours the DPF carrier, and can effectively remove moisture contained in the carrier.

Drawings

FIG. 1 is a schematic diagram of a diesel vehicle DPF regeneration detection device of the present invention;

fig. 2 is a top view of the drying deck of the present invention.

Detailed Description

The technical solution of the present invention is further illustrated by the following examples.

As shown in fig. 1, the diesel vehicle DPF regeneration detection device of the present invention includes a weighing device, a drying and exhaust pressure detection device, the weighing device is used for weighing a DPF carrier, the drying and exhaust pressure detection device includes a fan 12, a first pressure controller 16, an air heater 13, an air collection bag 8 and a buffer tank, the fan 12 is connected with the air heater 13, an air inlet of the DPF carrier is connected with the first pressure controller 16, the first pressure controller 16 is respectively connected with the air heater 13 and the air collection bag 8, and an air outlet 9 of the DPF carrier is connected with the buffer tank.

The buffer tank comprises a cloth bag 10 and a stainless steel tank 11, the cloth bag 10 is arranged in the stainless steel tank 11, and the cloth bag 10 is connected with an air outlet 9 of the DPF carrier. The cloth bag 10 is a cotton cloth filter bag. The fan 12 is a high pressure fan 12. The air collecting bag 8 is connected with external compressed air, and the air collecting bag 8 is provided with a second pressure controller 7. The DPF carrier air inlet is provided with a sealing cover 6, and the sealing cover 6 is respectively connected with a first pressure controller 16 and a lifting motor 5. Weighing device includes weighing sensor 2, weight display 3 and weighing platform 1, and weighing platform 1 is arranged in under the DPF carrier, and weighing platform 1 links to each other respectively with weighing sensor 2, weight display 3.

(a) weighing the DPF carrier for the first time before DPF regeneration;

(b) after the DPF is regenerated, connecting an air inlet of the DPF carrier with a first pressure controller 16, connecting an air outlet 9 of the DPF carrier with a buffer tank, releasing gas in a gas collection bag 8, exhausting moisture in the DPF carrier, and enabling the moisture to enter the buffer tank from the air outlet 9 of the DPF carrier;

(c) starting a fan 12 and an air heater 13 to blow and dry the DPF carrier, and when the first pressure controller 16 displays that the numerical value is kept constant, constantly displaying the numerical value as the pressure difference of the front end and the rear end of the DPF under the current air quantity;

(d) and weighing the dried DPF carrier for the second time, and subtracting the weight obtained by weighing twice to obtain the weight difference before and after DPF regeneration.

The maximum wind pressure of the fan 12 is 30 kPa. When the flow of the fan 12 is 60m³The outlet temperature of the air heater 13 was maintained at 100 ℃ during the reaction time/h.

The weighing device is used for DPF carrier weight detection, and DPF is directly placed on the weighing platform 1, and the weight is transmitted to the weight sensor 2, and a specific numerical value is displayed by the weight display 3.

As shown in fig. 2, when the DPF is dried, the DPF air outlet end is placed on the drying platform 4 upwards, the upper and lower motors 5 are controlled, the sealing cover 6 is enabled to tightly press the DPF, an external compressed air source is connected, the air pressure in the air collecting bag 8 is adjusted to a proper range through the pressure controller, the air in the air collecting bag 8 is released instantly, the moisture in the DPF carrier is drained, the moisture enters the cotton filter element through the air outlet 9, the permeate filtration enters the stainless steel tank 11, the high-pressure fan 12 and the air heater 13 are started after the process is repeated twice to blow and dry the DPF carrier through high-temperature air blowing, the air flow is adjusted through the air flow meter 14 and the temperature sensor 15 in a feedback mode, the pressure controller displays that the numerical value is kept constant, and the display numerical value is the pressure difference of the front end and the rear end of the DPF under the current air flow.

Claims

1. The utility model provides a detection apparatus for diesel vehicle DPF regeneration which characterized in that: including weighing device, drying and exhaust pressure detection device, weighing device is used for the DPF carrier to weigh, drying and exhaust pressure detection device include fan (12), first pressure controller (16), air heater (13), gas collection package (8) and buffer tank, fan (12) link to each other with air heater (13), the air inlet of DPF carrier links to each other with first pressure controller (16), first pressure controller (16) link to each other respectively with air heater (13), gas collection package (8), the gas outlet (9) of DPF carrier link to each other with the buffer tank.

2. The diesel vehicle DPF regeneration detection device according to claim 1, wherein: the buffer tank comprises a cloth bag (10) and a stainless steel tank (11), the cloth bag (10) is arranged in the stainless steel tank, and an opening of the cloth bag (10) is connected with an air outlet (9) of the DPF carrier.

3. The diesel vehicle DPF regeneration detection device according to claim 2, wherein: the cloth bag (10) is a cotton cloth filter bag.

4. The diesel vehicle DPF regeneration detection device according to claim 1, wherein: the fan (12) is a high-pressure fan.

5. The diesel vehicle DPF regeneration detection device according to claim 1, wherein: the air collecting bag (8) is connected with external compressed air, and a second pressure controller (7) is arranged on the air collecting bag (8).

6. The diesel vehicle DPF regeneration detection device according to claim 1, wherein: the DPF carrier air inlet is provided with a sealing cover (6), and the sealing cover is respectively connected with a first pressure controller (16) and a lifting motor.

7. The diesel vehicle DPF regeneration detection device according to claim 1, wherein: the weighing device comprises a weight sensor (2), a weight display (3) and a weighing platform (1), wherein the weighing platform (1) is arranged under the DPF carrier, and the weighing platform (1) is respectively connected with the weight sensor (2) and the weight display (3).