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CN-122017150-A - Fuel automobile exhaust emission detection device

CN122017150ACN 122017150 ACN122017150 ACN 122017150ACN-122017150-A

Abstract

The invention discloses a fuel automobile exhaust emission detection device, which relates to the technical field of new energy automobiles and comprises a detection box and a pretreatment mechanism, wherein the inner wall of the detection box is fixedly connected with a separation plate in a sealing way, the interior of the detection box is divided into a detection chamber and a pretreatment chamber by the separation plate, the pretreatment mechanism comprises a separation barrel fixedly connected to the inner wall of the pretreatment chamber, a plurality of semiconductor refrigerating sheets are fixedly embedded into the inner wall of the separation barrel, the side wall of the separation plate is fixedly connected with a filter barrel, the inner wall of the filter barrel is rotatably connected with a rotating shaft, the side wall of the rotating shaft is fixedly connected with a filter element, and the side wall of the filter element is fixedly connected with a catalytic oxidation layer. The pretreatment mechanism provided by the invention efficiently removes solid particles, liquid water and most gaseous pollutants in the tail gas, and finally the gas entering the detection chamber is clean and dry, so that the interference of moisture and impurities on the hydrogen concentration sensor is reduced, and the high accuracy and high reliability of monitoring data are ensured.

Inventors

  • TANG WEI
  • LIU WENQI

Assignees

  • 临沂市计量检定所

Dates

Publication Date
20260512
Application Date
20260312

Claims (10)

  1. 1. The fuel automobile exhaust emission detection device comprises a detection box (1), and is characterized by further comprising a pretreatment mechanism; the inner wall of the detection box (1) is fixedly connected with a separation plate (2) in a sealing way, and the separation plate (2) divides the interior of the detection box (1) into a detection chamber (201) and a pretreatment chamber (202); The pretreatment mechanism comprises a separating cylinder (3) fixedly connected to the inner wall of a pretreatment chamber (202), a plurality of semiconductor refrigerating pieces (8) are fixedly embedded in the inner wall of the separating cylinder (3), a filter cylinder (4) is fixedly connected to the side wall of a separating plate (2), a rotating shaft (5) is rotatably connected to the inner wall of the filter cylinder (4), a filter core (6) is fixedly connected to the side wall of the rotating shaft (5), a catalytic oxidation layer (601) is fixedly connected to the side wall of the filter core (6), an annular shell (7) is fixedly connected to the inner wall of the filter cylinder (4), a sampling assembly for collecting tail gas of a fuel automobile is arranged in the detecting box (1).
  2. 2. The fuel automobile exhaust emission detection device according to claim 1, wherein the sampling assembly comprises an air pump (9) fixedly connected to the inner wall of the detection box (1), an air suction pipe (10) is fixedly connected to the air inlet end of the air pump (9), the other end of the air suction pipe (10) penetrates through the side wall of the detection box (1), an air pump pipe (11) is fixedly connected to the air outlet end of the air pump (9), the other end of the air pump pipe (11) is communicated with the separation cylinder (3), an air inlet pipe (12) is fixedly connected to the upper end of the separation cylinder (3), the other end of the air inlet pipe (12) is communicated with the filter cartridge (4), and the filter cartridge (4) is communicated with the detection chamber (201) through an air inlet pipe (13).
  3. 3. The fuel automobile exhaust emission detection device according to claim 2, wherein the filter cartridge (4) is provided with a rotating mechanism, the rotating mechanism comprises a motor (14) fixedly connected to the upper end of the filter cartridge (4), an output end of the motor (14) penetrates through the inner top of the filter cartridge (4) and is fixedly connected with a first bevel gear (15), one end of the rotating shaft (5) is fixedly connected with a second bevel gear (16), and the first bevel gear (15) is in meshed connection with the second bevel gear (16).
  4. 4. The fuel automobile exhaust emission detection device according to claim 3, wherein the filter cartridge (4) is provided with a preheating mechanism, the preheating mechanism comprises an annular cylinder (19) fixedly connected to the side wall of the filter cartridge (4), the inner wall of the annular cylinder (19) is fixedly connected with a heat conducting fin (20), one end of the heat conducting fin (20) is attached to the annular shell (7), the annular shell (7) is made of a material with good heat conducting performance, the side wall of the separation cylinder (3) is fixedly connected with an annular heat exchange cylinder (44), the heat release end of the semiconductor refrigeration piece (8) extends into the annular heat exchange cylinder (44), the upper end of the annular heat exchange cylinder (44) is fixedly connected with a heat release pipe (45), the side wall of the annular cylinder (19) is fixedly connected with a heat inlet pipe (47), the heat release pipe (45) is communicated with the heat inlet pipe (47) through a communicating pipe (22), the side wall of the annular cylinder (19) is fixedly connected with a discharge pipe (21), and the other end of the discharge pipe (21) extends to the outside of the detection box (1).
  5. 5. The fuel automobile exhaust emission detection device according to claim 4, wherein the preheating mechanism further comprises a pump cylinder (23) fixedly connected to the inner top of the detection box (1), a sliding plug (24) is connected to the inner wall of the pump cylinder (23) in a sealing sliding manner, a one-way air inlet pipe (25) is fixedly connected to the inner wall of the pump cylinder (23), the other end of the one-way air inlet pipe (25) extends to the outside of the detection box (1), the pump cylinder (23) is communicated with the annular heat exchange cylinder (44) through a one-way air outlet pipe (26), a T-shaped rod (41) is fixedly connected to the lower end of the sliding plug (24), the lower end of the T-shaped rod (41) penetrates through the lower end of the pump cylinder (23), a spring (42) is sleeved on the side wall of the T-shaped rod (41), two ends of the spring (42) are fixedly connected with the lower end of the sliding plug (24) and the inner bottom of the pump cylinder (23), one end of the rotating shaft (5) penetrates through the side wall of the filter cylinder (4) and is fixedly connected with a cam (43), and the cam (43) is in sliding against the lower end of the T-shaped rod (41).
  6. 6. The fuel automobile exhaust emission detection device according to claim 4, wherein a plurality of diversion holes (46) are formed in the side wall of the heat conduction fin (20), and the diversion holes (46) penetrate through the heat conduction fin (20).
  7. 7. The fuel automobile exhaust emission detection device according to claim 3, wherein a regeneration mechanism is installed in the detection box (1), the regeneration mechanism comprises a differential pressure sensor (27) fixedly connected to the inner top of the detection box (1), two pressure taking holes (28) are formed in the upper end of the filter cylinder (4), the two pressure taking holes (28) are respectively communicated with the differential pressure sensor (27) through two connecting pipelines (29), a plurality of electric heating wires (30) are fixedly embedded in the catalytic oxidation layer (601), and the electric heating wires (30) are all connected with the differential pressure sensor (27) through a PLC (programmable logic controller).
  8. 8. The fuel automobile exhaust emission detection device according to claim 7, wherein the detection box (1) is provided with a cleaning mechanism, the cleaning mechanism comprises a gas storage box (31) fixedly connected to the upper end of the detection box (1), nitrogen is filled in the gas storage box (31), an air suction pipe (10) side wall is fixedly connected with an inlet pipe (32), the other end of the inlet pipe (32) is communicated with the gas storage box (31), an air storage tank (33) is formed in the inner wall of the filter cartridge (4), the side wall of the air suction pipe (11) is fixedly connected with a flushing pipe (34), the other end of the flushing pipe (34) is communicated with the air storage tank (33), an impurity discharge pipe (35) is fixedly connected to the inner wall of the filter cartridge (4), the other end of the impurity discharge pipe (35) extends to the outside of the detection box (1), an electromagnetic valve (36) is mounted on the inner wall of the air suction pipe (10), the air suction pipe (11), the air inlet pipe (12), the air inlet pipe (13), the flushing pipe (34) and the impurity discharge pipe (35), and the electromagnetic valve (36) are connected with a pressure difference sensor (27) through a control circuit.
  9. 9. The fuel automobile exhaust emission detection device according to claim 8, wherein the inner wall of the filter cartridge (4) is rotationally connected with a magnetic rotating rod (37), the side wall of the magnetic rotating rod (37) is fixedly connected with a plurality of sector baffles (38), each of the side walls of the sector baffles (38) is tightly attached to the inner wall of the filter cartridge (4), the side wall of the magnetic rotating rod (37) is rotationally connected with a bevel gear III (39), the bevel gear III (39) is in meshed connection with a bevel gear I (15), the side wall of the bevel gear III (39) is fixedly connected with an annular electromagnet (40), and the annular electromagnet (40) is connected with a differential pressure sensor (27) through a PLC (programmable logic controller).
  10. 10. The fuel automobile exhaust emission detection device according to claim 1, wherein the inner wall of the detection chamber (201) is fixedly connected with a hydrogen concentration sensor (17), and the inner wall of the detection chamber (201) is provided with an exhaust port (18).

Description

Fuel automobile exhaust emission detection device Technical Field The invention relates to the technical field of new energy automobiles, in particular to a fuel automobile exhaust emission detection device. Background The fuel cell automobile becomes an important direction of new energy automobile development due to the advantages of zero emission, high efficiency and the like, and the accurate monitoring of the tail gas emission, particularly the unreacted hydrogen concentration, is a key for evaluating the working efficiency, the safety and the environmental protection of the fuel cell system. The existing fuel cell automobile exhaust has the characteristics of high temperature and high humidity, may contain solid particles and trace gaseous pollutants from air and system abrasion, and when the fuel cell automobile exhaust is directly detected by using precise instruments such as a hydrogen concentration sensor, moisture condensation can cause short circuit and drift of the sensor, solid impurities can pollute and abrade sensitive elements of the sensor, and the monitoring precision and the service life of the sensor are seriously influenced. Disclosure of Invention In order to solve the problems in the prior art, the invention adopts the following technical scheme: the fuel automobile exhaust emission detection device comprises a detection box and a pretreatment mechanism; The inner wall of the detection box is fixedly connected with a separation plate in a sealing way, and the separation plate divides the interior of the detection box into a detection chamber and a pretreatment chamber; The pretreatment mechanism comprises a separating cylinder fixedly connected to the inner wall of a pretreatment chamber, a plurality of semiconductor refrigeration pieces are fixedly embedded in the inner wall of the separating cylinder, a filter cylinder is fixedly connected to the side wall of the separating plate, a rotating shaft is rotatably connected to the inner wall of the filter cylinder, a filter core is fixedly connected to the side wall of the rotating shaft, a catalytic oxidation layer is fixedly connected to the side wall of the filter core, an annular shell is fixedly connected to the inner wall of the filter cylinder, the side wall of the filter core is in sealing sliding connection with the inner wall of the annular shell, and a sampling assembly for collecting tail gas of a fuel automobile is installed in the detection box. Preferably, the sampling assembly comprises an air pump fixedly connected to the inner wall of the detection box, an air inlet end of the air pump is fixedly connected with an air exhaust pipe, the other end of the air exhaust pipe penetrates through the side wall of the detection box, an air outlet end of the air pump is fixedly connected with an air pump pipe, the other end of the air pump pipe is communicated with a separating cylinder, the upper end of the separating cylinder is fixedly connected with an air inlet pipe, the other end of the air inlet pipe is communicated with a filter cylinder, and the filter cylinder is communicated with the detection chamber through the air inlet pipe. Preferably, the filter cartridge is provided with a rotating mechanism, the rotating mechanism comprises a motor fixedly connected to the upper end of the filter cartridge, the output end of the motor penetrates through the inner top of the filter cartridge and is fixedly connected with a first bevel gear, one end of the rotating shaft is fixedly connected with a second bevel gear, and the first bevel gear is in meshed connection with the second bevel gear. Preferably, install preheating mechanism on the cartridge filter, preheating mechanism includes the annular section of thick bamboo of fixed connection at cartridge filter lateral wall, annular section of thick bamboo inner wall fixedly connected with heat conduction fin, heat conduction fin one end and annular shell laminating, the annular shell adopts the material that heat conductivility is good to be made, separating cylinder lateral wall fixedly connected with annular heat exchange tube, the exothermic end of semiconductor refrigeration piece extends to in the annular heat exchange tube, annular heat exchange tube upper end fixedly connected with exhaust pipe, annular cylinder lateral wall fixedly connected with heat inlet tube, the exhaust pipe passes through communicating pipe and heat inlet tube intercommunication, annular cylinder lateral wall fixedly connected with discharge pipe, the discharge pipe other end extends to the detection case outside. Preferably, the preheating mechanism further comprises a pump cylinder fixedly connected to the inner top of the detection box, a sliding plug is connected to the inner wall of the pump cylinder in a sealing sliding manner, a unidirectional air inlet pipe is fixedly connected to the inner wall of the pump cylinder, the other end of the unidirectional air inlet pipe extends to the outer po