ORVR compatible oil gun gas-liquid ratio detection equipment

Abstract

The utility model belongs to the technical field of oil gas recovery of gas stations, and particularly relates to ORVR compatible oil gun gas-liquid ratio detection equipment. The ORVR compatible oil gun gas-liquid ratio detection equipment comprises a barrel body, an oil-gas outlet is formed in the barrel body, and a first valve is arranged on the oil-gas outlet; the connecting pipeline is connected with the barrel body through an opening adjuster, and the opening adjuster is constructed to be capable of adjusting the opening of the connecting pipeline; the pressure detection module and the test module are arranged on the connecting pipeline, the pressure detection module is constructed to be capable of measuring the pressure in the connecting pipeline, and the test module is constructed to be capable of measuring the flow in the connecting pipeline and collecting data; and the oil gun adapter is arranged at the end part of the connecting pipeline.

Description

Technical Field

[0001] This utility model belongs to the field of gas station oil and gas recovery technology, specifically, it relates to an ORVR-compatible gas-liquid ratio detection device for fuel nozzles. Background Technology

[0002] ORVR stands for Onboard Vapor Recycling System. Studies have shown that the secondary vapor recovery systems currently installed at gas stations are incompatible with ORVR systems. Gas stations with secondary vapor recovery systems experience excessive emissions when refueling ORVR vehicles.

[0003] Regarding the compatibility issue between secondary vapor recovery and ORVR systems, using ORVR-compatible fuel nozzles is one of the optimal solutions. Using ORVR-compatible fuel nozzles effectively identifies ORVR vehicles, reducing air intake into underground fuel tanks and thus minimizing excessive emissions from these tanks. However, existing on-site calibration equipment at gas stations can only test the gas-liquid ratio under non-ORVR vehicle refueling conditions, lacking equipment and methods for calibrating the gas-liquid ratio under ORVR vehicle refueling conditions. Therefore, it's impossible to determine whether the overall performance of ORVR-compatible fuel nozzles meets national and local standards. Furthermore, most gas station gas flow meters currently lack temperature and pressure compensation. Therefore, after replacing parts or adjusting the vapor recovery system, the online monitoring system needs to be calibrated based on the gas-liquid ratio calibration test results. Currently, this is generally done manually, which is cumbersome and prone to errors.

[0004] Therefore, there is an urgent need to develop an ORVR-compatible gas-liquid ratio detection device for refueling nozzles. Utility Model Content

[0005] In view of the technical problems mentioned above, the present invention aims to provide an ORVR-compatible gas-liquid ratio detection device for refueling nozzles, which can solve at least one of the above technical problems.

[0006] According to this utility model, an ORVR-compatible fuel nozzle gas-liquid ratio detection device is provided, comprising: a barrel body, an oil / gas outlet provided on the barrel body, and a first valve provided on the oil / gas outlet; a connecting pipeline connected to the barrel body via an opening regulator, the opening regulator being configured to adjust the opening of the connecting pipeline; a pressure detection module and a testing module provided on the connecting pipeline, the pressure detection module being configured to measure the pressure in the connecting pipeline, and the testing module being configured to measure the flow rate in the connecting pipeline and collect data; and a fuel nozzle adapter provided at the end of the connecting pipeline.

[0007] In one specific embodiment, the fuel nozzle adapter, the pressure detection module, and the test module are sequentially arranged on the connecting pipeline.

[0008] In one specific embodiment, the test module includes: a flow detection module for detecting the fluid velocity within the connecting pipeline; and a test management data collection module electrically connected to the flow detection module.

[0009] In one specific embodiment, the opening regulator is electrically connected to the test management data collection module.

[0010] In one specific embodiment, the first valve is electrically connected to the test management data collection module.

[0011] In one specific embodiment, a gasoline drain port is provided on the barrel, and a second valve is provided on the gasoline drain port.

[0012] In one specific embodiment, the second valve is electrically connected to the test management data collection module.

[0013] In one specific embodiment, the gasoline vent is connected to a second recovery tank via the second valve.

[0014] In one specific embodiment, the oil and gas outlet is located above the gasoline vent.

[0015] In one specific embodiment, the oil and gas outlet is connected to the first recovery tank via the first valve.

[0016] Compared with the prior art, the advantages of this application are as follows.

[0017] This invention provides an ORVR-compatible fuel nozzle gas-liquid ratio detection device, capable of detecting the gas-liquid ratio of both ORVR and non-ORVR fuel nozzles. Furthermore, it can be used for both ORVR-compatible and ordinary vapor recovery fuel nozzles. Attached Figure Description

[0018] The present invention will now be described with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic front view of one embodiment of the ORVR-compatible fuel nozzle gas-liquid ratio detection device according to the present invention.

[0020] Figure 2 This is a top view schematic diagram of an embodiment of the ORVR-compatible refueling nozzle gas-liquid ratio detection device according to the present invention;

[0021] Figure 3 This is a side view of one embodiment of the ORVR-compatible fuel nozzle gas-liquid ratio detection device according to the present invention.

[0022] Figure 4 This is a schematic diagram of the appearance of the data processing correction module according to this utility model;

[0023] Figure 5 Logic diagram for detecting a standard fuel nozzle;

[0024] Figure 6 Logic diagram for testing ORVR-compatible refueling nozzles in non-ORVR mode;

[0025] Figure 7 ORVR-compatible refueling nozzle ORVR mode test logic diagram;

[0026] Figure 8 The logic diagram for the online monitoring system is calibrated.

[0027] The reference numerals in the figure are as follows:

[0028] 1. Fuel nozzle adapter; 2. Connecting pipeline; 3. Pressure detection module; 4. Test module; 5. Opening regulator; 6. Gas outlet; 7. Gas vent; 8. Container; 100. ORVR compatible fuel nozzle gas-liquid ratio detection equipment.

[0029] In this application, all the accompanying drawings are schematic drawings, used only to illustrate the principle of the present invention, and are not drawn to scale. Detailed Implementation

[0030] The present invention will now be described with reference to the accompanying drawings.

[0031] It should be noted that the directional terms or qualifiers used in this application, such as "up," "down," "front," "back," "left," and "right," are all specific to the referenced material. Figure 1 In other words, they are not used to define the absolute position of the components involved, but can vary depending on the specific circumstances.

[0032] Figure 1 The structure of the ORVR-compatible refueling nozzle gas-liquid ratio detection device 100 according to this utility model is shown. Figure 1 As shown, the ORVR-compatible fuel nozzle gas-liquid ratio detection device 100 mainly includes a tank body 8, an opening regulator 5, a fuel nozzle adapter 1, a connecting pipeline 2, a pressure detection module 3, and a testing module 4.

[0033] Test module 4 includes a flow detection module (not shown in the figure) for detecting the fluid velocity within the connecting pipe 2, and a test management data collection module (not shown in the figure) electrically connected to the flow detection module. The flow detection module detects the gas phase velocity and accumulates the gas phase flow rate. The flow meter in the flow detection module can be a Roots flow meter, thermal flow meter, vortex flow meter, etc., with a Roots flow meter being preferred. The flow detection range is 0–200 L / min, preferably 0–100 L / min.

[0034] The test management data collection module is used to execute test commands and collect test data, and transmit the data to the mobile test receiving module (not shown in the figure). In this embodiment, the test management data collection module and the mobile test receiving module are connected via Bluetooth.

[0035] like Figures 1-3 As shown, in this embodiment, the barrel 8 is square in shape and is used to store gasoline. It should be noted that although the barrel 8 in this embodiment is square in shape, this is not intended to limit the scope of protection of this utility model, and the shape of the barrel 8 is not limited to square.

[0036] An opening regulator 5 is located at the top of the tank 8. The connecting pipe 2 is connected to the tank 8 via the opening regulator 5, which is designed to adjust the opening of the connecting pipe 2. The opening regulator 5 can be infinitely adjustable or adjustable in increments. When infinitely adjustable, the opening can be adjusted from 0% to 100%. When adjustable in increments, it can be set to 100%, 50%, 30%, 20%, 10%, and 5% opening points. The opening regulator 5 is equipped with an electric adjustment system, electrically connected to the test management data collection module of the test module 4. The test management data collection module of the test module 4 can send electrical signals to the opening regulator 5 to control the opening, thereby achieving automatic opening adjustment. It is self-evident that the specific structure of the opening regulator 5 is existing technology and will not be described in detail here.

[0037] Pressure detection module 3 and test module 4 are installed on connecting pipe 2.

[0038] The pressure detection module 3 is configured to measure the pressure within the connecting pipe 2, used to detect the pressure in the connecting pipe 2 during the refueling process. In this embodiment, the pressure gauge range is -2000Pa to +2000Pa. The pressure detection module 3 is electrically connected to the test management data collection module of the test module 4, and the pressure detection data from the pressure detection module can be transmitted to the test management data collection module of the test module 4 in real time.

[0039] The fuel nozzle adapter 1 is located at the end of the connecting pipe 2 furthest from the container 8. The fuel nozzle adapter 1 is designed according to the model of the fuel nozzle, and ensures that all fuel vapors during the refueling process enter the fuel nozzle.

[0040] like Figure 1 As shown, the fuel nozzle adapter 1, pressure detection module 3, and test module 4 are sequentially arranged on the connecting pipe 2. When testing the gas-liquid ratio, the fuel nozzle to be measured is installed on the fuel nozzle adapter 1. The oil and gas enter the test module 4 through the opening regulator 5, and then sequentially pass through the pressure detection module 3, the connecting pipe 2, and the fuel nozzle adapter 1 before entering the oil and gas recovery channel of the fuel nozzle.

[0041] An oil / gas outlet 6 is provided at the top of the container 8, and a first valve (not shown in the figure) is provided on the oil / gas outlet 6. The oil / gas outlet 6 is connected to a first recovery tank (not shown in the figure) through the first valve. When detecting the gas-liquid ratio of the refueling nozzle for a non-ORVR vehicle, the first valve is in the closed state; when detecting the gas-liquid ratio of the refueling nozzle for an ORVR vehicle, the first valve is in the open state. By opening the first valve, excess gas phase inside the container 8 can be discharged to the first recovery tank.

[0042] In one specific embodiment, the first valve is an electric ball valve, which is electrically connected to the test management data collection module of test module 4. The opening or closing of the electric ball valve can be controlled by an electrical signal. The first recovery tank is a carbon canister for oil and gas recovery. The gas phase resistance of the carbon canister is 800-1200 Pa, preferably 1000 Pa.

[0043] A gasoline drain port 7 is provided on the lower side of the barrel 8, and a second valve is provided on the gasoline drain port 7, which connects the inner cavity of the barrel 8 to the outside. The second valve is connected to a second recovery tank. In this embodiment, the second valve is a ball valve, and the second recovery tank is a buried oil tank to realize gasoline return. The second valve is electrically connected to the test management data collection module of the test module 4, thereby realizing automatic opening and closing.

[0044] According to this utility model, in one embodiment, the ORVR-compatible fuel nozzle gas-liquid ratio detection device 100 further includes a data processing and correction module: on the one hand, it is used to receive data from the test management and data collection module; on the other hand, it can be connected to an online monitoring system to acquire fueling data, perform comprehensive data processing, and correct the online monitoring system. It is readily understood that the data processing and correction module is well known to those skilled in the art and will not be described in detail here.

[0045] According to this utility model, an ORVR-compatible fuel nozzle gas-liquid ratio detection method is provided, which uses an ORVR-compatible fuel nozzle gas-liquid ratio detection device 100 to detect the gas-liquid ratio of the fuel nozzle.

[0046] like Figure 5 As shown, the method for detecting the gas-liquid ratio in a typical fuel dispenser is as follows.

[0047] Step 1: Install the fuel nozzle adapter 1 suitable for ordinary fuel nozzles, and insert the fuel nozzle into the fuel nozzle adapter 1, ensuring that the fuel nozzle and fuel nozzle adapter 1 are sealed, and that all oil and gas flow through the test module 4.

[0048] Step 2: Connect the data processing and correction module to the online monitoring system.

[0049] Step 3: Close the second valve of gasoline vent 7.

[0050] Step 4: Select the ordinary oil gun test in the system of the data processing and correction module.

[0051] Step 5: The test management data collection module of test module 4 closes the first valve of oil and gas outlet 6 and sets the opening degree of opening regulator 5 to 100%.

[0052] Step 6: Enter the number of the fuel nozzle to be tested into the system of the data processing and correction module.

[0053] Step 7: Insert the fuel nozzle into the sealed fuel inlet of the additional test fuel container and refuel in a sealed manner. Add more than 15L of gasoline to the test fuel container after unloading, and check whether the whole device meets the testing conditions.

[0054] Step 8: Fill the test oil tank with 15L to 20L of oil at the highest refueling rate in a sealed container;

[0055] Step 9: The test management data collection module automatically calculates the gas-liquid ratio based on the parameters measured by the refueling volume and flow detection modules.

[0056] In one specific embodiment, the gas-liquid ratio of an OPW 12VW oil and gas recovery type refueling nozzle was tested according to the above method. 15.49L of oil was sealed into the test oil tank at the highest refueling flow rate. The test module 4 measured the cumulative gas flow rate and displayed it as 17.09L. The gas-liquid ratio of the refueling nozzle was calculated to be 1.10.

[0057] The ORVR-compatible fuel nozzle gas-liquid ratio detection operates under two conditions: gas-liquid ratio during ORVR vehicle refueling and gas-liquid ratio during non-ORVR refueling. For example... Figure 6 As shown, the gas-liquid ratio is detected during refueling of a non-ORVR vehicle.

[0058] Step 1: Install the fuel nozzle adapter 1 for ORVR compatible fuel nozzles, and insert the fuel nozzle into the fuel nozzle adapter 1. Ensure that the fuel nozzle and fuel nozzle adapter 1 are sealed, and that all oil and gas flow through the test module 4.

[0059] Step 2: Connect the data processing and correction module to the online monitoring system.

[0060] Step 3: Close the second valve of gasoline vent 7.

[0061] Step 4: In the data processing and correction module, select the ORVR-compatible fuel nozzle non-ORVR mode for detection.

[0062] Step 5: The test management data collection module of test module 4 closes the first valve of oil and gas outlet 6 and sets the opening degree of opening regulator 5 to 100%.

[0063] Step 6: Enter the number of the fuel nozzle to be tested into the system of the data processing and correction module.

[0064] Step 7: Insert the fuel nozzle into the sealed fuel inlet of the additional test fuel container and refuel in a sealed manner. Add more than 15L of gasoline to the test fuel container after unloading, and check whether the entire device meets the testing requirements.

[0065] Step 8: Add 15L to 20L of oil to the test oil tank at the highest refueling rate in a sealed manner. Measure the pressure in the connecting pipe 2 through the pressure detection module 3 and record the pressure P1.

[0066] Step 9: Determine if the pressure value P1 is greater than 1 kPa. If yes, proceed to the next step; otherwise, the test is invalid.

[0067] Step 10: The test management data collection module automatically calculates the gas-liquid ratio based on the parameters measured by the refueling volume and flow detection modules.

[0068] In one specific embodiment, the gas-liquid ratio of an ORVR-compatible refueling nozzle of model AGY-ORVR was tested according to the above method. 15.35L of refueling was sealed into the test oil tank at the highest refueling flow rate. The test module 4 measured the cumulative gas flow rate as 17.69L, and the pressure detection module 3 measured the pressure reading as 2kPa. The gas-liquid ratio of the refueling nozzle was calculated to be 1.15.

[0069] In one specific embodiment, the gas-liquid ratio of an ORVR-compatible refueling nozzle of model Healy-700 was tested according to the above method. 15.27L of refueling was sealed into the test oil tank at the highest refueling flow rate. The test module 4 measured the cumulative gas flow rate as 17.47L, and the pressure detection module 3 measured the pressure reading as 3kPa. The gas-liquid ratio of the refueling nozzle was calculated to be 1.14.

[0070] like Figure 7 As shown, the gas-liquid ratio is detected during ORVR vehicle refueling.

[0071] Step 1: Install the fuel nozzle adapter 1 for ORVR compatible fuel nozzles, and insert the fuel nozzle into the fuel nozzle adapter 1. Ensure that the fuel nozzle and fuel nozzle adapter 1 are sealed, and that all oil and gas flow through the test module 4.

[0072] Step 2: Connect the data processing and correction module to the online monitoring system.

[0073] Step 3: Close the second valve of gasoline vent 7.

[0074] Step 4: In the data processing and correction module, select ORVR compatible fuel nozzle ORVR mode detection.

[0075] Step 5: The test management data collection module of test module 4 opens the first valve of oil and gas outlet 6, and the opening degree of the opening regulator 5 is set to x, preferably 30%.

[0076] Step 6: Enter the number of the fuel nozzle to be tested into the system of the data processing and correction module.

[0077] Step 7: Insert the fuel nozzle into the sealed fuel inlet of the additional test fuel container and refuel in a sealed manner. Add more than 15L of gasoline to the test fuel container after unloading, and check whether the entire device meets the testing requirements.

[0078] Step 8: Add more than 15L of gasoline to the test oil drum, measure the pressure in the connecting pipe 2 through the pressure detection module 3, and record the pressure P2.

[0079] Step 9: Determine if the pressure value P1 is less than -1 kPa. If yes, proceed to the next step; otherwise, execute step 4 and reduce the opening of the opening regulator 5.

[0080] Step 10: The test management data collection module automatically calculates the gas-liquid ratio based on the parameters measured by the refueling volume and flow detection modules.

[0081] In one specific embodiment, the gas-liquid ratio of an ORVR-compatible refueling nozzle (model AGY-ORVR) was tested using the method described above. With the opening regulator 5 set to 30%, 15.45L of refueling was performed into the test tank at the highest refueling flow rate. The test module 4 measured a cumulative gas flow rate of 6.10L, and the pressure detection module 3 measured a pressure reading of 0. At this point, the gas-liquid ratio of the refueling nozzle was 1.15. Then, the opening regulator 5 was set to 10%, and 15.23L of refueling was performed into the test tank at the highest refueling flow rate. The test module 4 measured a cumulative gas flow rate of 0.94L, and the pressure detection module 3 measured a pressure reading of 0. At this point, the gas-liquid ratio of the refueling nozzle was 0.06.

[0082] In one specific embodiment, the gas-liquid ratio of an ORVR-compatible refueling nozzle (model Healy-700) was tested using the method described above. The opening regulator 5 was set to 10%, and 15.28L of refueling fluid was injected into the test tank at the highest refueling flow rate. The test module 4 measured a cumulative gas flow rate of 0.94L, and the pressure detection module 3 measured a pressure reading of 0. At this point, the gas-liquid ratio of the refueling nozzle was 0.06.

[0083] Based on the above testing method, the fuel nozzles at different refueling positions were tested, and the test results are shown in Table 1.

[0084] Table 1. Detection results of gas-liquid ratio at different refueling points.

[0085] refueling station number Fuel volume / L Measured return gas volume / L Measured gas-liquid ratio Intake pressure / kPa 18 15.31 1.38 0.09 -1.1 19 15.12 1.89 0.12 -1.1 22 15.32 0.94 0.06 -1.1 23 15.27 0.63 0.04 -1.1

[0086] Comparative test cases

[0087] This test example tests the gas-liquid ratio of an ORVR-compatible fuel nozzle when refueling a non-ORVR vehicle. For specific testing methods and instruments, please refer to GB20952-2020.

[0088] 1. Firmly insert the fuel nozzle into the adapter to ensure that the gas being drawn in passes through the flow meter;

[0089] 2. Insert the fuel nozzle into the sealed fuel inlet of the test oil tank for sealed refueling. Add 15L of gasoline to the test oil tank after unloading, and check whether the overall device meets the testing requirements.

[0090] 3. Set the gas flow meter reading A, fuel quantity reading L, and stopwatch reading t to zero;

[0091] 4. Add 15.36L of oil to the sealed oil tank at the highest refueling flow rate;

[0092] 5. Record the flow meter reading and stopwatch reading;

[0093] 6. Calculate the gas-liquid ratio and refueling flow rate using the following formulas.

[0094] The gas-liquid ratio of the oil gun is 1.12.

[0095] The national standard GB20952-2020, concerning equipment and methods, cannot detect the gas-liquid ratio when refueling ORVR-compatible vehicles using ORVR-compatible fuel nozzles.

[0096] This invention provides a method for rapid gas-liquid ratio calibration of an online monitoring system.

[0097] To reduce the workload of testing personnel, this invention provides a method for rapid calibration of the gas-liquid ratio. Depending on the type of refueling nozzle at the refueling station, the online monitoring system is calibrated using either an ORVR-compatible refueling nozzle in non-ORVR mode or a standard refueling nozzle mode. Figure 8 As shown, the calibration method is as follows.

[0098] ① If the average gas-liquid ratio of the test is 1.0≤a≤1.2, then proceed to step ②; if the average gas-liquid ratio of the test is a<1.0 or a>1.2, then proceed to step ④.

[0099] ② If the difference between the online monitoring system a0 and the average gas-liquid ratio a calculated by the test is within ±0.05, and the online monitoring gas-liquid ratio meets the national standard requirements, then the online monitoring system is normal and no calibration is required; the gas-liquid ratio calibration is completed. If the gas-liquid ratio difference is greater than ±0.05, proceed to step ③.

[0100] ③ Calculate the online monitoring gas-liquid ratio and the test gas-liquid ratio, and calibrate the gas flow meter.

[0101] ④ Adjust the oil and gas recovery system to ensure that the gas-liquid ratio meets the requirement of 1.0≤a≤1.2, and then retest.

[0102] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0103] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0104] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0105] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and does not constitute any limitation on this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An ORVR-compatible gas-liquid ratio detection device for refueling nozzles, characterized in that, include: A barrel body (8) is provided with an oil and gas outlet (6), and a first valve is provided on the oil and gas outlet (6); The connecting pipe (2) is connected to the barrel (8) through the opening regulator (5), and the opening regulator (5) is configured to adjust the opening of the connecting pipe (2); The pressure detection module (3) and the test module (4) are installed on the connecting pipe (2). The pressure detection module (3) is configured to measure the pressure in the connecting pipe (2), and the test module (4) is configured to measure the flow rate in the connecting pipe (2) and collect data. as well as The fuel nozzle adapter (1) is installed at the end of the connecting pipe (2).

2. The ORVR-compatible refueling nozzle gas-liquid ratio detection device according to claim 1, characterized in that, The fuel nozzle adapter (1), the pressure detection module (3), and the test module (4) are sequentially installed on the connecting pipeline (2).

3. The ORVR-compatible refueling nozzle gas-liquid ratio detection device according to claim 1, characterized in that, The test module (4) includes: A flow detection module for detecting the fluid velocity within the connecting pipe (2); and Test management data collection module electrically connected to the flow detection module.

4. The ORVR-compatible refueling nozzle gas-liquid ratio detection device according to claim 3, characterized in that, The opening regulator (5) is electrically connected to the test management data collection module.

5. The ORVR-compatible refueling nozzle gas-liquid ratio detection device according to claim 3, characterized in that, The first valve is electrically connected to the test management data collection module.

6. The ORVR-compatible refueling nozzle gas-liquid ratio detection device according to claim 3, characterized in that, A gasoline drain port (7) is provided on the barrel body (8), and a second valve is provided on the gasoline drain port (7).

7. The ORVR-compatible refueling nozzle gas-liquid ratio detection device according to claim 6, characterized in that, The second valve is electrically connected to the test management data collection module.

8. The ORVR-compatible refueling nozzle gas-liquid ratio detection device according to claim 6, characterized in that, The gasoline vent (7) is connected to the second recovery tank via the second valve.

9. The ORVR-compatible refueling nozzle gas-liquid ratio detection device according to claim 6, characterized in that, The oil and gas outlet (6) is located above the gasoline vent (7).

10. The ORVR-compatible refueling nozzle gas-liquid ratio detection device according to claim 1, characterized in that, The oil and gas outlet (6) is connected to the first recovery tank through the first valve.

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