A refueling gun and oil gas recovery online monitoring system capable of transmitting a state

Abstract

The application provides a refueling gun capable of transmitting a state, which comprises a refueling gun body, which is a vehicle-mounted oil gas recovery system compatible oil gas recovery refueling gun structure; a position sensing unit, which is used for measuring the working state information of a sensing valve in the refueling gun body; and a state transmission unit, which has wireless transmission capability and is used for transmitting the working state information of the sensing valve to an oil gas recovery online monitoring system in a gas station to determine whether the current refueling vehicle is provided with a vehicle-mounted oil gas recovery system. The application can measure the state of a gas collection hood in a refueling process and the recognition state of the vehicle-mounted oil gas recovery system. Moreover, the state can be timely transmitted to the oil gas recovery online monitoring system in the gas station, so that the working state of the vehicle-mounted oil gas recovery system compatible oil gas recovery refueling gun can be diagnosed and analyzed, and the oil gas recovery online monitoring system is provided with an intelligent diagnosis function for the vehicle-mounted oil gas recovery system compatible oil gas recovery refueling gun.

Description

Technical Field

[0001] This invention relates to the field of refueling nozzles and refueling technology, and more specifically, to a refueling nozzle with transmittable status and an online monitoring system for oil and gas recovery. Background Technology

[0002] A secondary vapor recovery system at a gas station refers to a system that, during the refueling process, uses vacuum assistance to recover the gases inside the vehicle's fuel tank and transfer them to underground fuel tanks, thereby reducing the emission of oil and gas pollutants into the atmosphere during refueling. According to GB20952-2007 "Emission Standard for Air Pollutants from Gas Stations," all gas stations selling gasoline in my country should install secondary vapor recovery equipment, which mainly involves secondary vapor recovery refueling nozzles, coaxial hoses, oil-gas separators, gas-liquid ratio regulating valves, vacuum pumps, and other equipment.

[0003] Currently, the installation rate of secondary oil and gas recovery systems at gas stations in my country is close to 100%. However, it has been found that due to the large number of components involved in the secondary oil and gas recovery system, such as fuel nozzles, regulating valves, and vacuum pumps, and the narrow range of the gas-liquid ratio qualification rate (only 1.0-1.2), the failure rate and maintenance costs are relatively high in actual operation, with an average recovery efficiency of only about 70% to 95%.

[0004] To ensure the performance and stability of the secondary oil and gas recovery system, in accordance with the requirements of GB20952-2007, gas stations with annual sales of more than 5,000 tons of gasoline should also be equipped with an online monitoring system. This system monitors the gas-liquid ratio, gasoline flow rate, and refueling flow rate during the refueling process. In case of a malfunction, the system should be maintained or automatically adjusted in a timely manner, which can improve the oil and gas recovery efficiency to over 95%.

[0005] In December 2016, GB18352.6-2016, "Limits and Measurement Methods for Pollutant Emissions from Light-Duty Vehicles," also known as the China VI emission standard for automobiles, was released. To meet the requirements of this standard, vehicles sold in China must be equipped with on-board vapor recovery systems starting in 2020. Based on international experience with on-board vapor recovery systems, these systems achieve a vapor recovery efficiency of over 98%, exhibit stable performance, and a low failure rate, making them a more advanced vapor recovery system.

[0006] Because the secondary vapor recovery system at gas stations is a vacuum-assisted system, sharing it with the on-board vapor recovery system would cause the secondary system to draw a large amount of air into the underground fuel tank, resulting in excessive and incompatible emissions of oil and gas. Therefore, according to GB20952-2020, when the number of vehicles equipped with on-board vapor recovery systems exceeds 20%, gas stations should use vapor recovery refueling equipment compatible with the on-board vapor recovery system. This means the secondary vapor recovery system should be able to identify vehicles with on-board vapor recovery systems, and when refueling vehicles with on-board vapor recovery systems, the gas-liquid ratio should be reduced to below 1.0; when refueling vehicles without on-board vapor recovery systems, the gas-liquid ratio should remain within the range of 1.0-1.2.

[0007] However, existing vehicle-mounted vapor recovery system compatible refueling equipment determines whether a vehicle is equipped with a vapor recovery system through its own mechanical structure, without transmitting the signal to the vapor recovery online monitoring system. As a result, the vapor recovery online monitoring system cannot determine whether the decrease in the gas-liquid ratio is caused by the failure of equipment such as vacuum pumps and regulating valves, or by refueling a vehicle equipped with a vapor recovery system. This causes the vapor recovery online monitoring system to lose its normal function of monitoring the effectiveness of the gas-liquid ratio.

[0008] To address the problems of existing technologies, this invention provides an online monitoring system for refueling nozzles and oil and gas recovery that can transmit status information. Summary of the Invention

[0009] To address the problems of the prior art, the present invention provides a refueling nozzle capable of being transferred, the refueling nozzle comprising:

[0010] The fuel nozzle body is a fuel vapor recovery fuel nozzle structure compatible with vehicle-mounted fuel vapor recovery systems.

[0011] A position sensing unit is used to measure and obtain the working status information of the sensing valve inside the fuel nozzle body;

[0012] The status transmission unit has wireless transmission capability and is used to transmit the working status information of the sensing valve to the online monitoring system for oil and gas recovery in the gas station to determine whether the current refueling vehicle has an on-board oil and gas recovery system.

[0013] According to one embodiment of the present invention, the sensing valve includes a first sensing valve. When the first sensing valve is closed, the position of its internal diaphragm is close to the central axis of the fuel nozzle body. When the first sensing valve is open, the position of its internal diaphragm is far away from the central axis of the fuel nozzle body.

[0014] According to one embodiment of the present invention, the position sensing unit includes a first position sensing unit, the first position sensing unit comprising:

[0015] A first magnetic element is disposed on the internal diaphragm of the first sensing valve;

[0016] A first position sensor is disposed outside the first sensing valve at a position corresponding to the first magnetic element. When the first sensing valve is closed, the first position sensor generates a first state signal based on its relative position to the first magnetic element. When the first sensing valve is open, the first position sensor generates a second state signal based on its relative position to the first magnetic element.

[0017] According to one embodiment of the present invention, the sensing valve further includes a second sensing valve for detecting the working state of the first sensing valve. When the second sensing valve is closed, the position of its internal diaphragm is close to the central axis of the fuel nozzle body. When the second sensing valve is open, the position of its internal diaphragm is far away from the central axis of the fuel nozzle body.

[0018] According to one embodiment of the present invention, the position sensing unit includes a second position sensing unit, the second position sensing unit comprising:

[0019] The second magnetic element is disposed on the internal diaphragm of the second sensing valve;

[0020] The second position sensor is disposed outside the second sensing valve at a position corresponding to the second magnetic element. When the second sensing valve is closed, the second position sensor generates a third state signal based on its relative position to the second magnetic element. When the second sensing valve is open, the second position sensor generates a fourth state signal based on its relative position to the second magnetic element.

[0021] According to one embodiment of the present invention, the position sensing unit includes a third position sensing unit, the third position sensing unit comprising:

[0022] The third magnetic element is disposed at the end of the mechanical linkage of the gas collecting shroud on the body of the fuel nozzle;

[0023] The third position sensor is located outside the refueling nozzle body at a position corresponding to the third magnetic element. When the gas collecting hood is not compressed and the mechanical linkage is in a reset state due to the action of the internal spring, the third position sensor generates a fifth state signal based on its relative position relationship with the third magnetic element. When the gas collecting hood is compressed and the mechanical linkage is displaced, the third position sensor generates a sixth state signal based on its relative position relationship with the third magnetic element.

[0024] According to one embodiment of the present invention, the refueling nozzle comprises:

[0025] An energy supply unit, which is connected to the status transmission unit, is used to provide electrical energy to the status transmission unit.

[0026] According to one embodiment of the present invention, the energy supply unit converts other forms of energy into electrical energy, wherein the other forms of energy include one or more of the following: energy generated by internal oil flow, energy generated by oil and gas flow, energy generated by pressing the oil gun, energy generated by pressing the gas collection hood, and energy generated by vibration of the oil gun body.

[0027] According to another aspect of the present invention, an online monitoring system for oil and gas recovery is also provided, the system comprising:

[0028] A refueling nozzle in a transferable state as described in any of the preceding items;

[0029] The status determination circuit is used to determine whether the current refueling vehicle has an on-board vapor recovery system based on the working status information of the sensing valve.

[0030] According to one embodiment of the present invention, the system comprises:

[0031] The gas-liquid ratio statistical circuit is used to statistically analyze the gas-liquid ratio during the refueling process to obtain the qualified rate data of oil and gas recovery for each refueling nozzle.

[0032] According to another aspect of the present invention, an online monitoring method for oil and gas recovery is also provided, wherein online monitoring of oil and gas recovery is performed using an online monitoring system for oil and gas recovery as described in any of the preceding claims, the method comprising the following steps:

[0033] The operating status information of the sensing valve is obtained by measuring the state of the fuel nozzle as described in any of the preceding items.

[0034] The online monitoring system for oil and gas recovery, as described in any of the above, determines whether the current refueling vehicle has an on-board oil and gas recovery system based on the working status information of the sensing valve.

[0035] According to another aspect of the invention, a storage medium is also provided, which includes a series of instructions for performing the steps of an online monitoring method for oil and gas recovery as described above.

[0036] This invention provides a fuel nozzle with transmittable status and an online monitoring system for vapor recovery. By adding status sensing and wireless transmission components to key mechanical parts of the fuel nozzle, it can measure the status of the vapor collection hood and the identification status of the vehicle-mounted vapor recovery system during refueling. Furthermore, it can transmit this data in real time to the online monitoring system for vapor recovery within the gas station. This allows for diagnostic analysis of the operating status of fuel nozzles compatible with vehicle-mounted vapor recovery systems, giving the online monitoring system intelligent diagnostic capabilities for such fuel nozzles.

[0037] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0038] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0039] Figure 1 A block diagram of a refueling nozzle in a transferable state according to an embodiment of the present invention is shown; and

[0040] Figures 2-4 A schematic diagram of a refueling nozzle structure in a transferable state according to an embodiment of the present invention is shown. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0042] The existing technology (US6305440B1) provides a fuel dispenser system with an on-board vapor recovery system equipped with radio frequency identification (RFID). It primarily uses radio frequency communication technology to identify vehicles equipped with or without an on-board vapor recovery system. When a vehicle approaches the dispenser, the system transmits the information about whether it has an on-board vapor recovery system to the dispenser via RFID. Upon receiving the signal, if the vehicle has an on-board vapor recovery system, the dispenser actively reduces the vapor-liquid ratio; if the vehicle does not have an on-board vapor recovery system, no action is taken. However, this system requires installing a corresponding RFID device on each vehicle, which is cumbersome and uneconomical.

[0043] The existing technology (CN204824143U) provides a refueling nozzle suitable for secondary and on-board vapor recovery systems in gas stations. It primarily addresses the issue of the narrow gas-liquid ratio adjustment range in existing secondary vapor recovery refueling nozzles, improving upon the limited application range of these nozzles. It achieves a wide gas-liquid ratio adjustment range of 0.1-1.2, ensuring compatibility with both secondary vapor recovery systems in gas stations and on-board vapor recovery systems. However, it does not mention the technology and solutions for identifying vehicles equipped with on-board vapor recovery systems, nor does it address compatibility solutions between on-board vapor recovery refueling nozzles and online vapor recovery monitoring systems in gas stations.

[0044] Existing technology (CN109399542B) provides a fuel nozzle with a multi-sealing mechanism, including a nozzle body and a nozzle tip disposed on the nozzle body. A first sealing cap is movably fitted onto the nozzle to cover the filling port of the fuel tank's fuel pipe, and the first sealing cap is sealed to the nozzle tip. This method primarily achieves a sealed connection with the vehicle's fuel filler port through a quick-connect-like mechanism, requiring adaptation modifications to the vehicle's fuel filler port to improve vapor recovery efficiency. However, it does not mention the technology and solutions for identifying vehicles equipped with onboard vapor recovery systems, nor does it address compatibility solutions between onboard vapor recovery system-compatible fuel nozzles and gas station online vapor recovery monitoring systems.

[0045] In summary, existing vehicle-mounted vapor recovery system compatible refueling nozzles rely on mechanical structures to determine whether a vehicle has a vapor recovery system and then adjust the vapor-liquid ratio through an internal structure. However, they cannot transmit this signal to the gas station's online vapor recovery monitoring system. This prevents the online monitoring system from distinguishing whether the drop in vapor-liquid ratio is due to a malfunction of the vacuum pump, regulating valve, or other equipment, or from refueling a vehicle with a vapor recovery system. Consequently, the online monitoring system loses its normal function of monitoring the effectiveness of the vapor-liquid ratio.

[0046] To address this, the present invention develops a refueling nozzle that features on-board oil and gas recovery system status transmission and is compatible with secondary oil and gas recovery and online monitoring systems.

[0047] Figure 1 A block diagram of a refueling nozzle in a transferable state according to an embodiment of the present invention is shown.

[0048] like Figure 1 As shown, the refueling nozzle 100 includes a refueling nozzle body 101, a position sensing unit 102, and a status transmission unit 103.

[0049] The fuel nozzle body 101 is a fuel vapor recovery fuel nozzle structure compatible with vehicle-mounted fuel vapor recovery system; the position sensing unit 102 is used to measure the working status information of the sensing valve; the status transmission unit 103 has wireless transmission capability and is used to transmit the working status information of the sensing valve to the fuel vapor recovery online monitoring system in the gas station to determine whether the current refueling vehicle has a vehicle-mounted fuel vapor recovery system.

[0050] In one embodiment, the sensing valve includes a first sensing valve 27. When the first sensing valve 27 is closed, the position of its internal diaphragm 29 is close to the central axis of the fuel nozzle body. When the first sensing valve 27 is open, the position of its internal diaphragm 29 is far away from the central axis of the fuel nozzle body.

[0051] Furthermore, to monitor the status information of the first sensing valve, the position sensing unit includes a first position sensing unit, which comprises a first magnetic element 25 and a first position sensor 26. The first magnetic element 25 is disposed on the internal diaphragm 29 of the first sensing valve 27. The first position sensor 26 is disposed outside the first sensing valve 27 at a position corresponding to the first magnetic element 25. When the first sensing valve 27 is closed, the first position sensor 26 generates a first status signal based on its relative position to the first magnetic element 25. When the first sensing valve 27 is open, the first position sensor 26 generates a second status signal based on its relative position to the first magnetic element 25.

[0052] When the fuel dispenser is refueling a regular vehicle (without an onboard vapor recovery system), the first sensing valve 27 of the dispenser is open, and the internal diaphragm 29 is positioned away from the center of the dispenser body. When the fuel dispenser is refueling a vehicle equipped with an onboard vapor recovery system, the first sensing valve 27 is closed, and the internal diaphragm 29 is positioned closer to the outside of the dispenser. Therefore, this invention detects the state of the first sensing valve 27 by setting a first position sensing unit on the internal diaphragm 29, thereby determining whether the vehicle being refueled has an onboard vapor recovery system.

[0053] The present invention provides a first magnetic element 25 on the inner diaphragm 29 of the first sensing valve 27, and a first position sensor 26 is provided on the outer side of the first sensing valve 27 corresponding to the position of the first magnetic element 25. By judging the distance of the inner diaphragm 29, the open / closed state of the first sensing valve 27 can be detected, thereby determining whether to refuel a regular car (a vehicle without an on-board vapor recovery system) or a car with an on-board vapor recovery system.

[0054] In one embodiment, the first position sensor 26 can be implemented using a Hall sensor. When a magnetic device (e.g., the first magnetic element 25) approaches the Hall sensor, the Hall sensor outputs a high level; when the magnetic device (e.g., the first magnetic element 25) moves away from the Hall sensor, the Hall sensor outputs a low level. The high and low levels of the Hall sensor are used to distinguish between the first state signal and the second state signal. Preferably, the Hall sensor can be a TI DRV5013 chip from Texas Instruments.

[0055] It should be noted that, in practical applications, the high-level state of the Hall sensor can represent the first state signal and the low-level state of the Hall sensor can represent the second state signal. Alternatively, the low-level state of the Hall sensor can represent the first state signal and the high-level state of the Hall sensor can represent the second state signal. This invention does not impose any limitations on this.

[0056] In one embodiment, the sensing valve further includes a second sensing valve 30 for detecting the working state of the first sensing valve 27. When the second sensing valve 30 is closed, its internal diaphragm 32 is positioned close to the central axis of the fuel nozzle body. When the second sensing valve 30 is open, its internal diaphragm 32 is positioned away from the central axis of the fuel nozzle body.

[0057] Furthermore, in order to monitor whether the first sensing valve is working properly via the second sensing valve, the position sensing unit includes a second position sensing unit, which includes a second magnetic element and a second position sensor (the second magnetic element and the second position sensor are not shown in the figure, but their specific positions are similar to those of the first magnetic element 25 and the first position sensor 26 of the first sensing valve 27). The second magnetic element is disposed on the internal diaphragm 32 of the second sensing valve 30; the second position sensor is disposed outside the second sensing valve 30 at a position corresponding to the second magnetic element. When the second sensing valve 30 is closed, the second position sensor generates a third state signal based on its relative position to the second magnetic element; when the second sensing valve 30 is open, the second position sensor generates a fourth state signal based on its relative position to the second magnetic element.

[0058] Specifically, the second position sensing unit is used to detect whether the first sensing valve 25 is working properly. If the first sensing valve 25 is in an open or closed state, the valve is working properly. If the first sensing valve 25 is always in a normally open or normally closed state, it is considered that the fuel nozzle may be faulty. Furthermore, it is determined that the identification function of the first sensing valve 25 also has a related fault.

[0059] It should be noted that in practical applications, the fuel nozzle body may only be equipped with the first sensing valve 27 and not the second sensing valve 30, or the fuel nozzle body may be equipped with both the first sensing valve 27 and the second sensing valve 30. This invention does not impose any restrictions on this.

[0060] In one embodiment, the second position sensor can be implemented using a Hall sensor. When the magnetic device (e.g., the second magnetic element) approaches the Hall sensor, the Hall sensor outputs a high level; when the magnetic device (e.g., the second magnetic element) moves away from the Hall sensor, the Hall sensor outputs a low level. The high and low levels of the Hall sensor are used to distinguish between the third and fourth state signals. Preferably, the Hall sensor can be a TI DRV5013 chip from Texas Instruments.

[0061] It should be noted that, in practical applications, the high-level state of the Hall sensor can represent the third state signal and the low-level state of the Hall sensor can represent the fourth state signal. Alternatively, the low-level state of the Hall sensor can represent the third state signal and the high-level state of the Hall sensor can represent the fourth state signal. This invention does not impose any limitations on this.

[0062] In one embodiment, the position sensing unit includes a third position sensing unit, which comprises a third magnetic element 17 and a third position sensor 16. The third magnetic element 17 is disposed at the end of the mechanical linkage 18 of the gas collecting shroud 21 on the fuel nozzle body. The third position sensor 16 is disposed outside the fuel nozzle body at a position corresponding to the third magnetic element 17. When the gas collecting shroud 21 is not compressed and is in a reset state due to the action of the internal spring 14, the third position sensor 16 generates a fifth state signal based on its relative position to the third magnetic element 17. When the gas collecting shroud 21 is compressed, causing displacement of the mechanical linkage 18, the third position sensor 16 generates a sixth state signal based on its relative position to the third magnetic element 17.

[0063] When no fuel is being dispensed, the vent cover 21 of the fuel nozzle, driven by the internal spring 14, moves the mechanical linkage 18 to its reset position. When refueling the vehicle, the vent cover 21 of the fuel nozzle is tightly pressed against the fuel tank opening, ensuring a sealed connection between the fuel tank opening and the fuel nozzle's return air passage. At this time, the mechanical linkage 18 is displaced by the push of the vent cover 21.

[0064] To detect whether the vent hood 21 is completely sealed to the fuel tank opening during refueling, this invention adds a third magnetic element 17 to the end of the mechanical linkage 18 of the vent hood 21. A third position sensor 16 is installed outside the refueling nozzle corresponding to the third magnetic element 17, enabling the detection of the compression state of the vent hood 21. When the vent hood 21 is compressed, it causes the mechanical linkage 18 to shift, and the position information of the mechanical linkage 18 is detected by the third position sensor 16, thus determining the working state of the vent hood 21.

[0065] Specifically, the third position sensor 16 can be implemented using a Hall sensor. When the magnetic device (e.g., the third magnetic element 17) approaches the Hall sensor, the Hall sensor outputs a high level; when the magnetic device (e.g., the third magnetic element 17) moves away from the Hall sensor, the Hall sensor outputs a low level. The high and low levels of the Hall sensor are used to distinguish between the fifth and sixth state signals. Preferably, the Hall sensor can be a TI DRV5013 chip from Texas Instruments.

[0066] It should be noted that, in practical applications, the high-level state of the Hall sensor can represent the fifth state signal and the low-level state of the Hall sensor can represent the sixth state signal. Alternatively, the low-level state of the Hall sensor can represent the fifth state signal and the high-level state of the Hall sensor can represent the sixth state signal. This invention does not impose any limitations on this.

[0067] In one embodiment, the status transmission unit 103 adopts low-power wireless communication technology, which can be Bluetooth, NB-IoT, LoRa or other wireless transmission methods. It mainly communicates wirelessly with the components of the online monitoring system for oil and gas recovery in the gas station, and transmits the compression status of the gas collection hood 21 and the status of the sensing valves (first sensing valve 27 and / or second sensing valve 30) during the refueling process to the online monitoring system for oil and gas recovery.

[0068] In one embodiment, the fuel nozzle 100 includes an energy supply unit 104 connected to a status transmission unit 103 for providing electrical energy to the status transmission unit 103.

[0069] Furthermore, the energy supply unit 104 converts other forms of energy into electrical energy, wherein the other forms of energy include one or more of the following: energy generated by internal oil flow, energy generated by oil and gas flow, energy generated by pressing the oil gun, energy generated by pressing the gas collection hood, and energy generated by the vibration of the oil gun body.

[0070] Furthermore, the energy supply unit 104 can be a battery assembly, preferably powered by a Panasonic CR 1220 button cell battery. The energy supply unit 104 can also provide energy to the status transmission unit 103 by collecting energy from other forms such as the flow of oil and gas inside the fuel nozzle, the pressing of the fuel nozzle, the pressing of the vent cover, and the vibration of the fuel nozzle itself.

[0071] In existing technology, vapor recovery fuel nozzles compatible with vehicle-mounted vapor recovery systems cannot transmit the identification signal of whether a vehicle has a vapor recovery system to the online vapor recovery monitoring system in the gas station. This makes it impossible for the online vapor recovery monitoring system to distinguish whether the decrease in the gas-liquid ratio is caused by the failure of equipment such as vacuum pumps and regulating valves, or by refueling a vehicle with a vapor recovery system. Consequently, the online vapor recovery monitoring system in the gas station loses its normal function of monitoring the effectiveness of the gas-liquid ratio.

[0072] By using the refueling nozzle with transmittable status provided by this invention, the status of the gas collection hood and the identification status of the vehicle-mounted vapor recovery system during the refueling process can be transmitted in a timely manner to the online monitoring system for vapor recovery in the gas station, thereby enabling diagnosis and analysis of the working status of the refueling nozzle compatible with the vehicle-mounted vapor recovery system.

[0073] Figures 2-4 A schematic diagram of a refueling nozzle structure in a transferable state according to an embodiment of the present invention is shown.

[0074] like Figures 2-4 As shown, a refueling nozzle capable of transmitting status includes: a handle 1, a gas-liquid ratio fine-tuning screw 2, a sensing valve 3, a proportional valve 4, a first hydraulic chamber 5 and a second hydraulic chamber 7 connected in communication, a main valve assembly 6, a pressureless self-sealing diaphragm 8, a pressureless self-sealing assembly 9, a self-controlling diaphragm assembly 10, a needle roller 11, a bushing 12, a self-controlling shaft 13, an internal spring 14, a valve core shaft 15, a third position sensor 16, a third magnetic element 17, a mechanical linkage 18, a push plate mechanism 19, an air supply port 20, an air collection hood 21, a nozzle 22, a secondary valve 23, an attitude valve 24, a status transmission unit 103, an energy supply unit 104, a first magnetic element 25, a first position sensor 26, a first sensing valve 27, an ORVR sensing spring 28, an internal diaphragm of the first sensing valve 29, a second sensing valve 30, a spring 31, and an internal diaphragm of the second sensing valve 32.

[0075] like Figure 2 As shown, the pressureless self-sealing diaphragm 8 is used to sense the oil pressure and automatically closes the valve of the refueling nozzle when the refueling pump is not turned on (i.e., no oil pressure is sensed).

[0076] like Figure 2 As shown, the sensing valve 3 is an on-board vapor recovery sensing valve (ORVR valve). The sensing valve 3 is located at the outlet of the fuel nozzle. By placing the sensing valve 3 close to the fuel nozzle head, the sensing valve 3 can be more sensitive to the pressure at the fuel tank opening.

[0077] like Figure 4As shown, the sensing valve 3 includes a first sensing valve 27 and a second sensing valve 30. The sensing valve 3 is disposed within the fuel nozzle body, with the first sensing valve 27 and the second sensing valve 30 positioned opposite each other. The first sensing valve 27 contains an ORVR sensing spring 28 and an internal diaphragm 29, where the Pmax of the ORVR sensing spring 28 represents a specific pressure value. A first magnetic element 25 is disposed on the internal diaphragm 29, and a first position sensor 26 is disposed on the outside of the first sensing valve 27 corresponding to the position of the first magnetic element 25. The second sensing valve 30 contains a spring 31 and an internal diaphragm 32, where the spring 31 represents a specific pressure value. A second magnetic element is disposed on the internal diaphragm 32, and a second position sensor is disposed on the outside of the second sensing valve 30 corresponding to the position of the second magnetic element.

[0078] like Figure 3 As shown, a gas-liquid ratio fine-tuning screw 2 is installed in the gas path of the fuel dispenser nozzle to adjust the gas flow rate through the proportional valve 4. The gas-liquid ratio fine-tuning screw 2 can be manually adjusted when needed. During refueling, the vapor recovery vacuum pump creates a vacuum in the fuel dispenser's gas path. Fuel gas enters the sensing valve 3 from the gas collection hood gas path, and then enters the fuel dispenser nozzle's gas path. The gas-liquid ratio fine-tuning screw 2 can control the flow cross-sectional area of ​​the fuel dispenser nozzle's gas path, for example, by the depth to which it is inserted, thereby affecting the gas resistance and adjusting the gas-liquid ratio.

[0079] like Figure 2 As shown, the inside of the fuel nozzle body also forms an interconnected fuel nozzle body oil passage and oil pressure chamber 5. A baffle is formed between the fuel nozzle body oil passage and oil pressure chamber 5. The fuel nozzle also includes a main valve assembly and a handle 1. The main valve assembly includes a bushing 12, a self-control shaft 13, a valve core assembly and a valve core spring. The bushing 12 is sleeved on the self-control shaft 13 and fixedly installed. The front end of the valve core assembly is connected to the rear end of the self-control shaft 13, and the rear end of the valve core assembly abuts against the valve core spring.

[0080] like Figure 2 As shown, the refueling nozzle also includes a valve spindle 15 disposed in the nozzle body and capable of blocking the return gas pipeline. A pusher is connected to the valve spindle 15 to drive the valve spindle 20 to move. The pusher includes a mechanical linkage 18 and a push plate mechanism 19. The push plate mechanism 19 is connected to the mechanical linkage 18. The mechanical linkage 18 can drive the valve spindle 15 to reciprocate. When the gas collection hood 21 is compressed, it will drive the push plate mechanism 19 and the mechanical linkage 18 to move backward.

[0081] like Figure 2As shown, a sealing steel ball is installed inside the attitude valve 24, and the valve seat is conical. When the nozzle of the refueling gun is facing downwards for normal refueling, the steel ball leaves the conical surface, the attitude valve 24 opens, and the return air line is unobstructed. When the nozzle of the refueling gun is facing upwards for refueling, the steel ball enters the conical surface, the attitude valve 24 closes, sealing the return air line and creating a vacuum in the return air line. The vacuum acts on the self-controlled diaphragm assembly 10, and the self-controlled diaphragm moves upwards against the spring pressure, causing the needle roller 11 to move upwards out of the slot of the self-controlled shaft 13. The self-controlled shaft 13 moves to the left, and the oil circuit of the refueling gun will be disconnected. This structure ensures that refueling cannot be performed when the nozzle of the refueling gun is facing upwards, preventing refueling misoperation.

[0082] like Figure 2 As shown, the gas collection hood 21 includes a corrugated pipe section located at the front, on which air inlet holes 20 are formed to connect the outside environment and the gas passage of the gas collection hood. The air inlet holes 20 at the corrugated pipe section of the gas collection hood 21 are used to replenish air when the amount of oil and gas is insufficient during the oil and gas recovery process or to discharge excess oil and gas overflowing during the oil and gas recovery process.

[0083] like Figure 2 As shown, a secondary valve 23 is provided at the tail of the fuel nozzle, and the return gas pipeline is connected to the secondary valve 23 through a through hole; the return gas pipeline is opened or closed by the valve spindle 15; the top of the fuel nozzle body is provided with a pressureless self-sealing component 9 and a self-regulating membrane component 10.

[0084] This invention also provides an online monitoring system for oil and gas recovery, comprising: a refueling nozzle capable of transmitting status information, and a status determination circuit. The status determination circuit is used to determine whether the current refueling vehicle has an on-board oil and gas recovery system based on the operating status information of the sensing valve.

[0085] When the status judgment circuit in the online monitoring system for oil and gas recovery only receives the first or second status signal transmitted from the refueling nozzle (i.e., the refueling nozzle is only equipped with the first position sensing unit, and the second and third position sensing units are not installed, or the refueling nozzle is equipped with the first, second, and third position sensing units, but the second and third position sensing units do not transmit the corresponding status signals to the status judgment circuit), the status judgment circuit determines whether the current refueling vehicle has an on-board oil and gas recovery system based on the first or second status signal.

[0086] Specifically, the status judgment circuit is used to determine whether the refueling nozzle is faulty and whether the current refueling vehicle has an on-board vapor recovery system based on the working status information of the first sensing valve 27.

[0087] In one embodiment, the state determination circuit performs the following logic:

[0088] When the fuel dispenser's fuel level signal is zero, if the first sensing valve 27 is in the closed state, a first judgment result is generated. Specifically, when the fuel dispenser's fuel level signal is zero, if the first sensing valve 27 is in the first state signal state, a first judgment result is generated.

[0089] Furthermore, when refueling is not being done with the fuel nozzle, i.e., when the fuel flow signal of the fuel dispenser is 0, the first sensing valve 27 should normally be in the open state. If the state of the sensing valve deviates from the above situation (the first sensing valve 27 should normally be in the open state), a first judgment result is generated. This first judgment result indicates that a malfunction has occurred inside the fuel nozzle, requiring repair or replacement.

[0090] When the fuel level signal of the fuel dispenser exceeds a preset value, if the first sensing valve 27 is in the open state, a second judgment result is generated. Specifically, when the fuel level signal of the fuel dispenser exceeds the preset value, if the first sensing valve 27 is in the second state signal, a second judgment result is generated.

[0091] Furthermore, when refueling using a fuel nozzle, i.e., when the fuel flow signal of the fuel dispenser exceeds a preset value (which can be manually preset or changed at any time), if the first sensing valve 27 is in the open state, a second judgment result is generated. This second judgment result indicates that the vapor recovery system is recovering vapors, thus determining that the refueling process is normal (for vehicles without an onboard vapor recovery system). The acceptable vapor-liquid ratio range should be within the range specified by national standards (e.g., according to national standard GB20952-2020, the vapor-liquid ratio range should be 1.0-1.2). If the vapor-liquid ratio exceeds this range, it is considered unqualified.

[0092] When the fuel level signal of the fuel dispenser exceeds a preset value, if the first sensing valve 27 is in the closed state, a third judgment result is generated. Specifically, when the fuel level signal of the fuel dispenser exceeds the preset value, if the first sensing valve 27 is in the first state signal, a third judgment result is generated.

[0093] Furthermore, when refueling using a fuel nozzle, i.e., when the fuel flow signal of the fuel dispenser exceeds a preset value (which can be manually preset or changed at any time), if the first sensing valve 27 is in a closed state, a third judgment result is generated. This third judgment result indicates that the vapor recovery system is recovering vapors, thus determining that the refueling is for a vehicle equipped with an onboard vapor recovery system. The acceptable vapor-liquid ratio range should be within the range specified by national standards (e.g., according to national standard GB20952-2020, the vapor-liquid ratio range should be approximately 0.5).

[0094] In summary, by measuring the operating status information of the first sensing valve 27 through a refueling nozzle capable of transmitting status data, it is possible to determine whether a vehicle has an on-board vapor recovery system. For vehicles with an on-board vapor recovery system, the acceptable range for the vapor-to-liquid ratio is approximately 0.5. For vehicles without an on-board vapor recovery system, according to national standard GB20952, the acceptable range for the vapor-to-liquid ratio is 1.0-1.2. Therefore, compared with existing online monitoring systems, the online monitoring system provided by this invention can achieve a higher compatibility rate assessment for vehicles with on-board vapor recovery systems. Furthermore, this invention can generate the corresponding judgment structure even without the sensing of the second sensing valve 30 and the vapor collector 21. Adding the sensing of the second sensing valve 30 and the vapor collector 21 can improve the accuracy of the judgment.

[0095] When the status judgment circuit of the online oil and gas recovery monitoring system receives the first status signal or the second status signal + the third status signal or the fourth status signal transmitted by the refueling nozzle (i.e., the refueling nozzle is only equipped with the first position sensing unit and the second position sensing unit, but not the third position sensing unit, or the refueling nozzle is equipped with the first position sensing unit, the second position sensing unit and the third position sensing unit, but the third position sensing unit does not transmit the corresponding status signal to the status judgment circuit), the status judgment circuit determines whether the first sensing valve is working properly and whether the current refueling vehicle has an on-board oil and gas recovery system through the first status signal or the second status signal + the third status signal or the fourth status signal.

[0096] Specifically, the status judgment circuit is used to determine whether the first sensing valve is working properly, whether the refueling nozzle is faulty, and whether the current refueling vehicle has an on-board vapor recovery system based on the working status information of the first sensing valve 27 and the second sensing valve 30.

[0097] Under normal conditions, when refueling is not in use, the fuel nozzle is in the reset state and remains suspended above the fuel dispenser. The nozzle lift signal and refueling flow signal of the fuel dispenser are both at 0. The vapor recovery vacuum pump is not running, and the fuel dispenser is not dispensing fuel. At this time, the first sensing valve 27, the second sensing valve 30, and the vapor collector 21 should all be in the reset state; that is, the first sensing valve 27 should be in the second state signal, the second sensing valve 30 in the fourth state signal, and the vapor collector 21 in the fifth state signal. If any of the state signals of the first sensing valve 27 or the second sensing valve 30 does not belong to any of the above states, the state judgment circuit determines that the fuel nozzle is in a fault state.

[0098] Under normal conditions, when refueling with a fuel nozzle, the fuel nozzle on the fuel dispenser is lifted, and the nozzle lifting signal is state 1. Then, the fuel nozzle is connected to the fuel tank filler neck, causing the vent cover 21 to be compressed, generating the sixth state signal. When the fuel nozzle switch is turned on to start refueling, the states of the first sensing valve 27 and the second sensing valve 30 change due to the influence of the vapor recovery pump, wherein:

[0099] If the first sensing valve 27 is in the first state signal, it indicates that the vehicle is being refueled with an on-board vapor recovery system.

[0100] If the first sensing valve 27 is in the second state signal, it means that it is refueling a vehicle without an on-board vapor recovery system.

[0101] If the second sensing valve 30 is in the fourth state signal, it indicates that the oil and gas recovery system is normal.

[0102] If the second sensing valve 30 is in the third state signal, it indicates that there may be a potential fault in the oil and gas recovery system.

[0103] When the status judgment circuit of the oil and gas recovery online monitoring system receives the first status signal or the second status signal + the fifth status signal or the sixth status signal transmitted by the refueling nozzle (i.e., the refueling nozzle is only equipped with the first position sensing unit and the third position sensing unit, but not the second position sensing unit, or the refueling nozzle is equipped with the first position sensing unit, the second position sensing unit and the third position sensing unit, but the second position sensing unit does not transmit the corresponding status signal to the status judgment circuit), the status judgment circuit determines whether the refueling nozzle is faulty and whether the current refueling vehicle has an on-board oil and gas recovery system based on the first status signal or the second status signal + the fifth status signal or the sixth status signal.

[0104] Specifically, the status judgment circuit is used to determine whether the refueling nozzle is faulty and whether the current refueling vehicle has an on-board vapor recovery system based on the working status information of the gas collection hood 21 and the working status information of the first sensing valve 27.

[0105] When refueling with a fuel nozzle, the status determination circuit executes the following logic:

[0106] If the first sensing valve 27 is in the first state signal after the vent 21 is in the sixth state signal, it indicates that the vehicle with the on-board vapor recovery system is being refueled.

[0107] If the first sensing valve 27 is in the second state after the vent 21 is in the sixth state signal, it means that the vehicle without an on-board vapor recovery system is being refueled.

[0108] If the vent hood 21 is in the fifth state signal, it indicates that the vent hood 21 may not be properly connected to the car's fuel tank opening. Normal refueling should not begin at this time, and it is impossible to determine whether the vehicle has on-board fuel vapor recovery function based on the state of the first sensing valve 27.

[0109] After refueling is completed, the first sensing valve 27 returns to the default state of the second state signal. When the refueling nozzle is removed from the car's fuel tank opening, the vent 21 returns to the default fifth state signal. Finally, the refueling nozzle is placed on the refueling machine.

[0110] When both the working status information of the gas collection hood 21 and the working status information of the first sensing valve 27 are present, the sequence of states when using the refueling gun should be: the gas collection hood 21 is squeezed -> the state of the first sensing valve 27 may change -> the first sensing valve 27 returns to its default state -> the gas collection hood 21 is reset. If the sequence of states is incorrect, a certain malfunction may have occurred.

[0111] When the status judgment circuit of the online monitoring system for oil and gas recovery receives the first status signal or the second status signal + third status signal or the fourth status signal + fifth status signal or the sixth status signal transmitted from the refueling nozzle (that is, the first position sensing unit, the second position sensing unit, and the third position sensing unit installed on the refueling nozzle all transmit corresponding status signals to the status judgment circuit), the status judgment circuit determines whether the first sensing valve is working properly, whether the refueling nozzle is faulty, and whether the current refueling vehicle has an on-board oil and gas recovery system through the first status signal or the second status signal + the third status signal or the fourth status signal + the fifth status signal or the sixth status signal.

[0112] Specifically, the status judgment circuit is used to determine whether the first sensing valve is working properly, whether the refueling nozzle is faulty, and whether the current refueling vehicle has an on-board oil and gas recovery system based on the working status information of the gas collection hood 21, the first sensing valve 27, and the second sensing valve 30.

[0113] If the status signals of the first sensing valve 27, the second sensing valve 30, and the vent shroud 21 are simultaneously present, during normal refueling, the fuel nozzle on the fuel dispenser is first lifted, and then the fuel nozzle is connected to the fuel filler neck of the vehicle's fuel tank, causing the vent shroud 21 to be squeezed, generating a sixth status signal; when the fuel nozzle switch is turned on to start refueling, the states of the first sensing valve 27 and the second sensing valve 30 change due to the influence of the vapor recovery pump, wherein:

[0114] If the first sensing valve 27 is in the first state signal, it indicates that the vehicle is being refueled with an on-board vapor recovery system.

[0115] If the first sensing valve 27 is in the second state signal, it indicates that it is refueling a vehicle without an on-board vapor recovery system.

[0116] If the second sensing valve 30 is in the fourth state signal, it indicates that the oil and gas recovery system is normal.

[0117] If the second sensing valve 30 is in the third state signal, it indicates that there may be a potential fault in the oil and gas recovery system.

[0118] After refueling is completed, the first sensing valve 27 returns to the default state of the second state signal, the second sensing valve 30 returns to the default state of the fourth state signal, and when the refueling nozzle is removed from the car's fuel tank opening, the vent hood 21 returns to the default fifth state signal. Finally, the refueling nozzle is placed on the refueling machine.

[0119] If the status signals of the first sensing valve 27, the second sensing valve 30, and the air hood 21 are present simultaneously, the status sequence during normal refueling should be: air hood 21 is squeezed -> the status of the first sensing valve 27 and the second sensing valve 30 may change -> the first sensing valve 27 and the second sensing valve 30 return to their default status -> air hood 21 is reset. If the status sequence is incorrect, a certain malfunction may have occurred.

[0120] If the status signals of the first sensing valve 27, the second sensing valve 30, and the vent hood 21 are simultaneously present, and a fuel dispenser nozzle lifting signal is also present, then during normal refueling, the fuel dispenser nozzle is first lifted, at which point the nozzle lifting signal is state 1. Then, the fuel dispenser nozzle is connected to the vehicle's fuel tank filler neck, causing the vent hood 21 to be compressed, generating a sixth status signal. When the fuel dispenser switch is turned on to begin refueling, the states of the first sensing valve 27 and the second sensing valve 30 change due to the influence of the vapor recovery pump, wherein:

[0121] If the first sensing valve 27 is in the first state signal, it indicates that the vehicle is being refueled with an on-board vapor recovery system.

[0122] If the first sensing valve 27 is in the second state signal, it indicates that it is refueling a vehicle without an on-board vapor recovery system.

[0123] If the second sensing valve 30 is in the fourth state signal, it indicates that the oil and gas recovery system is normal.

[0124] If the second sensing valve 30 is in the third state signal, it indicates that there may be a potential fault in the oil and gas recovery system.

[0125] After refueling is completed, the first sensing valve 27 returns to the default state of the second state signal, the second sensing valve 30 returns to the default state of the fourth state signal, and when the refueling nozzle is removed from the car's fuel tank opening, the vent cover 21 returns to the default fifth state signal. Finally, the refueling nozzle is placed on the refueling machine, and the refueling machine's nozzle removal signal state changes to 0.

[0126] If the status signals of the first sensing valve 27, the second sensing valve 30, and the gas collection hood 21 are present simultaneously, and the fuel dispenser nozzle lifting signal is also present, then during normal refueling, the status sequence should be: nozzle lifting signal becomes 1 -> gas collection hood 21 is squeezed -> the status of the first sensing valve 27 and the second sensing valve 30 changes -> the first sensing valve 27 and the second sensing valve 30 return to their default state -> gas collection hood 21 resets -> nozzle lifting signal becomes 0. If the status sequence is incorrect, a certain malfunction may have occurred.

[0127] If the status signals of the first sensing valve 27, the second sensing valve 30, and the vapor recovery hood 21 are simultaneously available, and the fuel dispenser nozzle lifting signal and the fuel flow signal are also available, then during normal refueling, the fuel dispenser nozzle is first lifted, at which point the nozzle lifting signal is state 1. Then, the fuel dispenser nozzle is connected to the vehicle's fuel tank filler neck, causing the vapor recovery hood 21 to be compressed, generating the sixth status signal. When the fuel dispenser nozzle is opened to begin refueling, a fuel flow signal is generated. Influenced by the vapor recovery pump, the states of the first sensing valve 27 and the second sensing valve 30 change, wherein:

[0128] If the first sensing valve 27 is in the first state signal, it indicates that the vehicle is being refueled with an on-board vapor recovery system.

[0129] If the first sensing valve 27 is in the second state signal, it indicates that it is refueling a vehicle without an on-board vapor recovery system.

[0130] If the second sensing valve 30 is in the fourth state signal, it indicates that the oil and gas recovery system is normal.

[0131] If the second sensing valve 30 is in the third state signal, it indicates that there may be a potential fault in the oil and gas recovery system.

[0132] After refueling is completed, the refueling flow signal becomes 0, the state of the first sensing valve 27 returns to the default state of the second state signal, the state of the second sensing valve 30 returns to the default state of the fourth state signal, and when the refueling nozzle is removed from the car's fuel tank opening, the state of the vent hood 21 returns to the default fifth state signal. Finally, the refueling nozzle is placed on the refueling machine, and the refueling machine nozzle lifting signal state becomes 0.

[0133] If the status signals of the first sensing valve 27, the second sensing valve 30, and the gas collection hood 21 are present simultaneously, and the fuel dispenser nozzle lifting signal and fuel flow signal are also present, then during normal fuel dispensing, the sequence of states should be: nozzle lifting signal -> gas collection hood 21 is squeezed -> fuel flow signal is generated -> the states of the first sensing valve 27 and the second sensing valve 30 change -> fuel flow signal becomes 0 -> the first sensing valve 27 and the second sensing valve 30 return to their default states -> gas collection hood resets -> nozzle lifting signal becomes 0. If the sequence of states is incorrect, a certain malfunction may have occurred.

[0134] In one embodiment, an online monitoring system for oil and gas recovery includes a gas-liquid ratio statistical circuit, which is used to statistically analyze the gas-liquid ratio value during the refueling process to obtain the oil and gas recovery qualification rate data corresponding to each refueling nozzle. Specifically, the online monitoring system for oil and gas recovery in the gas station determines the qualification rate data for each refueling nozzle by logically judging fault signals and statistically analyzing the gas-liquid ratio value of each refueling process through the gas-liquid ratio statistical circuit.

[0135] This invention also provides an online monitoring method for oil and gas recovery, which uses an online monitoring system for oil and gas recovery provided by this invention to perform online monitoring of oil and gas recovery, specifically including the following steps:

[0136] S1. The working status information of the sensing valve is obtained by measuring the state of the fuel nozzle provided by the present invention.

[0137] S2. The oil and gas recovery online monitoring system provided by the present invention determines whether the refueling nozzle is faulty and whether the current refueling vehicle has an on-board oil and gas recovery system based on the working status of the gas collection hood and the working status information of the sensing valve.

[0138] The present invention provides a refueling nozzle with transmittable status and an online monitoring system for oil and gas recovery. This system can also be used in conjunction with a computer-readable storage medium storing a computer program. Executing the computer program runs an online monitoring method for oil and gas recovery. The computer program can execute computer instructions, which include computer program code. The computer program code can be in the form of source code, object code, executable files, or some intermediate form.

[0139] Computer-readable storage media can include: any entity or device capable of carrying computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc.

[0140] It should be noted that the contents of computer-readable storage media may be appropriately added to or subtracted from the contents according to the requirements of legislation and patent practice in a jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable storage media may not include electrical carrier signals and telecommunication signals.

[0141] This invention can lead the environmental trend of gas stations by upgrading the compatibility of existing gas station vapor recovery systems and online monitoring systems. Currently, there are approximately 100,000 gas stations in my country, with about 800,000 fuel dispensers per station (assuming 8 dispensers per station). According to the latest GB20952 "Emission Standard for Air Pollutants from Gas Stations," when the number of my country VI emission standard vehicles equipped with onboard vapor recovery systems exceeds 20%, gas stations should adopt refueling equipment compatible with these systems. After replacing the fuel dispensers with onboard vapor recovery compatible equipment, based on US EPA literature, the vapor recovery efficiency at the refueling stage is expected to increase by 20% compared to existing secondary vapor recovery systems, reaching over 99.5%, resulting in a reduction of tens of thousands of tons of vapor pollutants annually. Furthermore, gas stations in my country with annual gasoline sales exceeding 5,000 tons have already installed online vapor recovery monitoring systems. Therefore, after upgrading to onboard vapor recovery compatible fuel dispensers, compatibility with the online vapor recovery monitoring system must also be considered; otherwise, the equipment investment of the past few years will be wasted, involving equipment assets worth nearly several billion yuan.

[0142] Based on the above-mentioned practical situation, the present invention provides a fuel nozzle with transmittable status and an online monitoring system for oil and gas recovery that is compatible with existing vehicle-mounted oil and gas recovery compatible fuel nozzles and existing online oil and gas recovery systems. It can improve both without replacing the existing vehicle-mounted oil and gas recovery compatible fuel nozzles and existing online oil and gas recovery systems, thus avoiding waste of resources.

[0143] In summary, the present invention provides a fuel nozzle with transmittable status and an online monitoring system for vapor recovery. By adding status sensing and wireless transmission elements to key mechanical structural parts of the fuel nozzle, it can measure the status of the vapor collection hood and the identification status of the vehicle-mounted vapor recovery system during the refueling process. Furthermore, it can transmit this information in a timely manner to the online monitoring system for vapor recovery within the gas station. This allows for diagnostic analysis of the operating status of fuel nozzles compatible with vehicle-mounted vapor recovery systems, enabling the online monitoring system to possess intelligent diagnostic capabilities for fuel nozzles compatible with vehicle-mounted vapor recovery systems.

[0144] It should be understood that the embodiments disclosed herein are not limited to the specific structures, processing steps, or materials disclosed herein, but should be extended to equivalent substitutions of these features as understood by those skilled in the art. It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0145] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0146] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0147] The phrase "an embodiment" or "an embodiment" used in this specification means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Therefore, the phrase "an embodiment" or "an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0148] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

[0149] While the embodiments disclosed in this invention are as described above, the content is merely for the purpose of facilitating understanding of the invention and is not intended to limit the invention. Any person skilled in the art to which this invention pertains may make any modifications and variations in form and detail of the implementation without departing from the spirit and scope disclosed herein; however, the scope of patent protection for this invention shall still be determined by the scope defined in the appended claims.

Claims

1. An online monitoring system for oil and gas recovery, characterized in that, The online monitoring system for oil and gas recovery includes: a refueling nozzle capable of transmitting status and a status judgment circuit, wherein the refueling nozzle includes a refueling nozzle body, a position sensing unit, and a status transmission unit. The fuel nozzle body is a fuel vapor recovery fuel nozzle structure compatible with vehicle-mounted fuel vapor recovery system; the position sensing unit is used to measure the working status information of the sensing valve and the gas collection hood inside the fuel nozzle body, wherein the sensing valve includes a first sensing valve and a second sensing valve, and the position sensing unit includes a first position sensing unit, a second position sensing unit and a third position sensing unit. The status transmission unit has wireless transmission capability and is used to transmit the working status information of the sensing valve and the gas collection hood to the status judgment circuit. The first position sensing unit includes: a first magnetic element disposed on the inner diaphragm of the first sensing valve; and a first position sensor disposed outside the first sensing valve at a position corresponding to the first magnetic element. When the first sensing valve is closed, the first position sensor generates a first state signal based on its relative position to the first magnetic element. When the first sensing valve is open, the first position sensor generates a second state signal based on its relative position to the first magnetic element. The second position sensing unit includes: a second magnetic element disposed on the inner diaphragm of the second sensing valve; and a second position sensor disposed outside the second sensing valve at a position corresponding to the second magnetic element. When the second sensing valve is closed, the second position sensor generates a third state signal based on its relative position to the second magnetic element. When the second sensing valve is open, the second position sensor generates a fourth state signal based on its relative position to the second magnetic element. The third position sensing unit includes: a third magnetic element disposed at the end of the mechanical linkage of the gas collecting hood on the fuel nozzle body; and a third position sensor disposed outside the fuel nozzle body at a position corresponding to the third magnetic element. When the gas collecting hood is not compressed and is driven by the internal spring to the mechanical linkage in a reset state, the third position sensor generates a fifth state signal based on its relative position relationship with the third magnetic element. When the gas collecting hood is compressed and the mechanical linkage is displaced, the third position sensor generates a sixth state signal based on its relative position relationship with the third magnetic element. Under normal conditions, when the refueling nozzle is not being used, the nozzle lift signal is 0 and the refueling flow signal is 0; the vapor recovery vacuum pump is not running and the refueling machine is not dispensing oil. At this time, the first sensing valve, the second sensing valve, and the gas collection hood should all be in the reset state. If any of the state signals of the first sensing valve and the second sensing valve are not in the reset state, the state judgment circuit determines that the refueling nozzle is in a fault state. The reset state refers to the first sensing valve being in the second state signal, the second sensing valve being in the fourth state signal, and the gas collection hood being in the fifth state signal. When refueling with the fuel nozzle, the status judgment circuit executes the following logic: if the gas collection hood is in the fifth status signal, it means that the gas collection hood and the fuel tank filler neck of the car may not be connected tightly. At this time, normal refueling should not start, and it is impossible to determine whether the vehicle has the vehicle vapor recovery function based on the status of the first sensing valve. Under normal conditions, when refueling with the fuel nozzle, the fuel nozzle on the fuel dispenser is lifted, and the lifting signal is state 1. Then, the fuel nozzle is connected to the fuel tank filler neck of the vehicle, causing the vent cover to be squeezed, generating the sixth state signal. When the fuel nozzle switch is turned on to start refueling, the refueling flow signal is generated. Affected by the vapor recovery vacuum pump, the states of the first sensing valve and the second sensing valve change. Specifically: if the first sensing valve is in the first state signal, it indicates that a vehicle with an onboard vapor recovery system is being refueled, and the qualified gas-liquid ratio is 0.5; if the first sensing valve is in the second state signal, it indicates that a vehicle without an onboard vapor recovery system is being refueled, and the qualified gas-liquid ratio is 1.0-1.2; if the second sensing valve is in the fourth state signal, it indicates that the vapor recovery system is normal; if the second sensing valve is in the third state signal, it indicates that there is a potential malfunction in the vapor recovery system. After refueling is completed, the refueling flow signal becomes 0, the first sensing valve returns to the second state signal, the second sensing valve returns to the fourth state signal, and when the refueling nozzle is removed from the fuel tank filler neck, the vent cover returns to the fifth state signal. Finally, the refueling nozzle is placed on the fuel dispenser, and the nozzle lifting signal state becomes 0. If the status signals of the first sensing valve, the second sensing valve, and the gas collection hood are present simultaneously, and the nozzle lifting signal and the refueling flow signal are also present, then during normal refueling, the state sequence should be: nozzle lifting signal -> the gas collection hood is squeezed -> the refueling flow signal is generated -> the status of the first sensing valve and the second sensing valve changes -> the refueling flow signal becomes 0 -> the first sensing valve and the second sensing valve return to the reset state -> the gas collection hood returns to the reset state -> the nozzle lifting signal becomes 0. If the state sequence is incorrect, it indicates a malfunction.

2. The online monitoring system for oil and gas recovery as described in claim 1, characterized in that, When the first sensing valve is closed, its internal diaphragm is positioned close to the central axis of the fuel nozzle body; when the first sensing valve is open, its internal diaphragm is positioned away from the central axis of the fuel nozzle body.

3. The online monitoring system for oil and gas recovery as described in claim 2, characterized in that, The second sensing valve is used to detect the working status of the first sensing valve. When the second sensing valve is closed, its internal diaphragm is positioned close to the central axis of the fuel nozzle body. When the second sensing valve is open, its internal diaphragm is positioned away from the central axis of the fuel nozzle body.

4. The online monitoring system for oil and gas recovery as described in claim 1, characterized in that, The refueling nozzle also includes: An energy supply unit, which is connected to the status transmission unit, is used to provide electrical energy to the status transmission unit.

5. The online monitoring system for oil and gas recovery as described in claim 4, characterized in that, The energy supply unit converts other forms of energy into electrical energy, wherein the other forms of energy include one or more of the following: energy generated by internal oil flow, energy generated by oil and gas flow, energy generated by pressing the oil gun, energy generated by pressing the gas collection hood, and energy generated by the vibration of the oil gun body.

6. The online monitoring system for oil and gas recovery as described in claim 1, characterized in that, The online monitoring system for oil and gas recovery also includes: The gas-liquid ratio statistical circuit is used to statistically analyze the gas-liquid ratio during the refueling process to obtain the qualified rate data of oil and gas recovery for each refueling nozzle.

7. A method for online monitoring of oil and gas recovery, characterized in that, Online monitoring of oil and gas recovery is performed using the online monitoring system for oil and gas recovery as described in any one of claims 1-6. The method comprises the following steps: The working status information of the sensing valve and the gas collection hood is obtained by measuring the fuel nozzle. The status judgment circuit determines whether the first sensing valve is working properly, whether the refueling nozzle is malfunctioning, and whether the current refueling vehicle has an on-board vapor recovery system based on the working status information of the sensing valve and the gas collection hood.

8. A storage medium, characterized in that, It contains a series of instructions for performing the steps of the method as described in claim 7.

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