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CN-121994637-A - Device and method for testing oil gas emission in oiling process of gasoline car

CN121994637ACN 121994637 ACN121994637 ACN 121994637ACN-121994637-A

Abstract

The invention relates to the technical field of testing devices, in particular to a device and a method for testing oil gas emission in the oiling process of a gasoline car. The technical scheme includes that the vacuum pump is further provided with a pair of activated carbon adsorption pipes, one end of each activated carbon adsorption pipe is fixedly provided with a first connector, one end of each first connector is connected with the vacuum pump, the other end of each activated carbon adsorption pipe is fixedly provided with a second connector, one end of each second connector is fixedly provided with a flow control valve, one end of each flow control valve is communicated with a gas flowmeter, and one end of each gas flowmeter is communicated with a special oil gas collecting cover. The invention realizes the accurate capturing and quantitative calculation of the oil gas emission in the whole oiling process, improves the accuracy and reliability of detection data, is convenient to maintain, is convenient to operate and is convenient to assemble.

Inventors

  • CHU YUE
  • LIU MINGYU
  • ZHANG YUEQIU
  • ZHANG WENBO
  • CHEN WENFEI

Assignees

  • 北京市机动车排放管理事务中心

Dates

Publication Date
20260508
Application Date
20260409

Claims (10)

  1. 1. The utility model provides a petrol vehicle refuels process oil gas emission testing arrangement, includes vacuum pump (1), its characterized in that still includes a pair of active carbon adsorption pipe (3), the one end fixed mounting of active carbon adsorption pipe (3) has first connector (33), the one end and the vacuum pump (1) of first connector (33) are connected, the other end fixed mounting of active carbon adsorption pipe (3) has second connector (6), the one end fixed mounting of second connector (6) has flow control valve (4), the one end intercommunication of flow control valve (4) has gas flowmeter (2), the one end intercommunication of gas flowmeter (2) has special oil gas to collect cover (5), be provided with in active carbon adsorption pipe (3) and carry out regeneration multiplexing auxiliary mechanism to the adsorbent after the saturation, be provided with the mechanism of breaking up of preventing the adsorbent caking in active carbon adsorption pipe (3).
  2. 2. The device for testing the oil gas emission amount during the oiling process of the gasoline vehicle according to claim 1, wherein the auxiliary mechanism comprises a third connector (7) fixedly installed at one end of an activated carbon adsorption tube (3), a first connecting tube (16) is fixedly installed on the third connector (7), a heating block (15) is fixedly installed on the first connecting tube (16), an air pump (14) is fixedly installed at one end of the heating block (15), an air storage tank (13) is fixedly installed at one end of the air pump (14), a fourth connector (8) is fixedly installed at the other end of the activated carbon adsorption tube (3), a second connecting tube (17) is fixedly installed at one end of the fourth connector (8), a cooling tube (18) is fixedly installed at one end of the second connecting tube (17), a spiral tube (19) is fixedly installed at one end of the cooling tube (18), a collecting groove (21) is fixedly installed at one end of the spiral tube (19), and an air outlet (20) is formed in the collecting groove (21).
  3. 3. The oil gas emission testing device for the oiling process of the gasoline vehicle according to claim 1, wherein the scattering mechanism comprises a fluted disc (25) fixedly installed in an activated carbon adsorption tube (3), a base (27) is rotatably installed at the bottom of the fluted disc (25), a plurality of first gears (28) are rotatably installed on the base (27), the first gears (28) are meshed with the fluted disc (25), a second gear (29) is rotatably installed at the bottom of the base (27), the second gear (29) is fixedly connected with the first gear (28), a third gear (31) is rotatably installed at the bottom of the base (27), the third gear (31) is meshed with the second gear (29), a connecting plate (30) is fixedly installed at the bottom of the third gear (31), a stirring rod (23) is fixedly installed at one end of the connecting plate (30), and a plurality of stirring blocks (24) are fixedly installed on the stirring rod (23).
  4. 4. A device for testing oil and gas emission amount during the oiling process of a gasoline vehicle according to claim 3, wherein a connecting shaft (26) is rotatably installed in the activated carbon adsorption tube (3), and one end of the connecting shaft (26) is fixedly connected with a base (27).
  5. 5. A device for testing oil and gas emission amount during the oiling process of a gasoline vehicle according to claim 3, wherein a motor (34) is fixedly arranged on the activated carbon adsorption tube (3), and an output shaft of the motor (34) is fixedly connected with a connecting shaft (26).
  6. 6. The device for testing the oil and gas emission amount during the oiling process of the gasoline vehicle according to claim 4, wherein the fluted disc (25) is provided with a mounting hole (32), and the connecting shaft (26) is positioned in the mounting hole (32).
  7. 7. A device for testing oil and gas emission amount during the oiling process of a gasoline vehicle according to claim 3, wherein a fixed rod (22) is fixedly arranged on the fluted disc (25), and one end of the fixed rod (22) is fixedly connected with the inner wall of the activated carbon adsorption tube (3).
  8. 8. The device for testing the oil and gas emission amount during the oiling process of the gasoline vehicle according to claim 2, wherein the first connector (33) is fixedly provided with a first electronic valve (9), and the second connector (6) is fixedly provided with a second electronic valve (10).
  9. 9. The device for testing the oil and gas emission amount during the oiling process of the gasoline vehicle according to claim 2, wherein a third electronic valve (11) is fixedly installed on the third connector (7), and a fourth electronic valve (12) is fixedly installed on the fourth connector (8).
  10. 10. A method for testing the quantity of oil gas emissions during the refueling process of a gasoline vehicle, characterized by comprising the steps of covering two special oil gas collecting covers (5) on the outer sides of the gas collecting covers of the test oil gun respectively to ensure tight fitting of the covers, weighing the mass of the activated carbon adsorption tube (3) in the oil gas collecting branch respectively, denoted as m1, and the mass of the activated carbon adsorption tube (3) in the air comparison branch, denoted as mk1, starting the vacuum pump (1) to access nitrogen to generate stable vacuum negative pressure, starting two gas flow meters (2), enabling the gas flow rates of the oil gas collecting branch and the air comparison branch to be consistent by adjusting corresponding flow control valves (4), enabling the gas flow rates of the oil gas collecting branch and the air comparison branch to be accurately matched with preset refueling flow rates of the to be tested, starting the refueling operation, enabling the oil gas to enter the collecting branch through the special oil gas collecting covers (5) in the whole refueling process, and be adsorbed by the weighed activated carbon adsorption tube (3) in the branch, simultaneously, enabling the air comparison branch to synchronously collect ambient air, closing the electronic device, enabling the electronic device to be in accordance with the measured mass of the activated carbon adsorption tube (3), and calculating the quantity of the activated carbon adsorption tube (m 1) to be equal to the quantity of the activated carbon adsorption tube (m 1) according to a weight change of the activated carbon adsorption tube in the air comparison branch, namely m 1-3, and the air adsorption quantity m1, and the activated carbon adsorption tube in the air comparison branch and the air comparison branch are calculated according to a change formula 1, and then the actual oil gas emission amount=delta m-delta mk is calculated by a formula, and the accurate oil gas emission value is obtained after the ambient air background interference is subtracted.

Description

Device and method for testing oil gas emission in oiling process of gasoline car Technical Field The invention relates to the technical field of testing devices, in particular to a device and a method for testing oil gas emission in the oiling process of a gasoline car. Background With the continuous increase of the automobile maintenance, the oil gas emission generated in the process of refueling the gasoline automobile has become one of the important sources of air pollution. Volatile Organic Compounds (VOCs) such as benzene, toluene and xylene contained in oil gas not only can cause harm to human health, but also can participate in photochemical reaction to exacerbate environmental problems such as haze and ozone pollution, so that effective control of oil gas emission in the oiling process has become a key requirement in the field of ecological environment protection. Currently, in order to reduce the oil gas leakage amount in the refueling process, beijing and the like have started to push ORVR (vehicle-mounted refueling oil gas recovery) compatible oil guns, the emission reduction effect of the oil guns needs to be evaluated through accurate detection data so as to support the landing and optimization of related environmental protection policies, however, the conventional oil gas emission test technology in the refueling process of the gasoline vehicle still has a plurality of defects, which are difficult to meet the actual application requirements, the conventional test equipment is generally huge in size, heavy in structure and poor in mobility, cannot be quickly adapted to diversified test scenes of different gas stations and different refueling positions, causes limited coverage range of detection work, is difficult to realize large-scale and multi-point emission reduction effect verification, the operation flow of the conventional test device is complex, the technical skill requirements on operators are high, the time cost of on-site detection is prolonged, the distortion of detection data is easily caused by improper operation, the on-site detection work is not easy to develop, the existing detection technology is mostly in an instantaneous detection mode, the accumulated metering function of oil gas emission in the whole oiling process is lacked, the background interference of ambient air is difficult to be eliminated, the detection precision is insufficient, the oil gas emission rule of the whole oiling period cannot be accurately reflected, reliable data support is difficult to be provided for the emission reduction effect evaluation of an ORVR compatible oil gun, the adsorbent (such as activated carbon) for adsorbing the oil gas in the existing test device is usually required to be replaced integrally after the adsorption is saturated, the cost of the tested consumable is increased, and the resource waste is possibly caused; meanwhile, the adsorbent is easy to generate caking phenomenon in the long-term use process, so that the adsorption area is reduced, the oil gas adsorption efficiency and the accuracy of detection data are further reduced, the existing device lacks an effective solution for regeneration and reuse of the adsorbent and anti-caking, and further limits the practicability and economy of the testing device, so that the application provides an oil gas emission testing device and method in the oiling process of a gasoline vehicle. Disclosure of Invention The invention aims to solve the problems of complicated operation and inaccurate detection result in the background technology, and provides an oil gas emission testing device and method in the oil filling process of a gasoline vehicle. In a first aspect, the invention provides an oil gas emission testing device for a gasoline vehicle oiling process, which comprises a vacuum pump, and further comprises a pair of activated carbon adsorption pipes, wherein one end of each activated carbon adsorption pipe is fixedly provided with a first connector, one end of each first connector is connected with the vacuum pump, the other end of each activated carbon adsorption pipe is fixedly provided with a second connector, one end of each second connector is fixedly provided with a flow control valve, one end of each flow control valve is communicated with a gas flowmeter, one end of each gas flowmeter is communicated with a special oil gas collecting cover, an auxiliary mechanism for regenerating and multiplexing a saturated adsorbent is arranged in each activated carbon adsorption pipe, and a scattering mechanism for preventing the adsorbent from caking is arranged in each activated carbon adsorption pipe. Optionally, the auxiliary mechanism includes the third connector of fixed mounting in active carbon adsorption pipe one end, fixed mounting has first connecting pipe on the third connector, fixed mounting has the heating block on the first connecting pipe, the one end fixed mounting of heating block has the air pump, the one end fixed mou