Vehicle-mounted oil gas recovery compatible fuel gun and fuel dispenser

Abstract

The application provides a vehicle-mounted oil gas recovery compatible refueling gun and refueling machine, and relates to the technical field of oil gas recovery. The vehicle-mounted oil gas recovery compatible refueling gun and refueling machine comprise a gun body, an induction assembly arranged on the gun body, a pressure detection device arranged on a recovery gas circuit, a first electromagnetic control assembly and a second electromagnetic control assembly arranged on the gun body, wherein the induction assembly comprises a valve seat, a first induction valve and a second induction valve; the pressure detection device is used for detecting the oil gas pressure flowing through the recovery gas circuit; the first electromagnetic control assembly is used for adjusting the opening degree of the first induction valve according to the oil gas pressure of the recovery gas circuit; and the second electromagnetic control assembly is used for adjusting the opening degree of the second induction valve according to the oil gas pressure of the recovery gas circuit. The vehicle-mounted oil gas recovery compatible refueling gun and refueling machine solve the problem that the induction coefficient of the pressure induction valve on the refueling gun is fixed in the prior art, and the working condition after the oil gas pressure in the oil gas recovery system changes cannot be timely adapted, so that the refueling gun has more extensive, flexible applicability and robustness.

Description

Technical Field

[0001] This invention relates to the field of oil and gas recovery technology, specifically to a vehicle-mounted oil and gas recovery compatible refueling nozzle and a refueling machine. Background Technology

[0002] Current fuel dispensers typically use pressure-sensing valves to determine whether a vehicle has an onboard vapor recovery system. The spring constant of the pressure-sensing valve needs to be determined comprehensively based on the pumping capacity of the vapor recovery vacuum pump, the resistance of the internal flow channel of the vapor recovery system, and various resistance components installed on the flow channel. For example, changes in the size of the gas-liquid separator, the length and diameter of the vapor recovery coaxial hose, and the size of the return copper pipe will all affect the spring constant of the sensing valve. However, the pressure-sensing valves used on existing fuel dispensers usually employ mechanical elastic elements, and their pressure sensing coefficient is typically a fixed value, only suitable for certain specific vapor recovery system conditions. In actual use, replacement, maintenance, and wear of the vapor recovery vacuum pump can cause significant changes in the vapor pressure conditions of the vapor recovery system, making it impossible for the selected pressure-sensing valve's internal spring constant to match the actual operating conditions in a timely manner, thus causing the fuel dispenser's sensing and recognition function to fail.

[0003] Therefore, there is an urgent need for a refueling nozzle to solve at least one of the above problems. Summary of the Invention

[0004] The purpose of this invention is to address the problem in existing technologies where the pressure sensing valve on the fuel nozzle has a fixed sensing coefficient and cannot adapt to changes in oil and gas pressure in the oil and gas recovery system in a timely manner. This invention provides a vehicle-mounted oil and gas recovery compatible fuel nozzle and a fuel dispenser to solve the above problems.

[0005] To achieve the above objectives, one aspect of the present invention provides a vehicle-mounted fuel nozzle compatible with vapor recovery, comprising: a fuel nozzle body, a gas collection hood provided at the front end of the fuel nozzle body, and a recovery gas passage provided inside the fuel nozzle body that is connected to the secondary vapor recovery system of the gas station;

[0006] A sensing component is installed on the body of the oil gun, the sensing component including a valve seat and a first sensing valve and a second sensing valve symmetrically arranged on the valve seat;

[0007] The pressure detection device installed on the recovery gas line is used to detect the oil and gas pressure flowing through the recovery gas line;

[0008] A first electromagnetic control component and a second electromagnetic control component are installed on the main body of the oil gun. The first electromagnetic control component is used to adjust the opening degree of the first sensing valve in real time according to the oil and gas pressure of the recovery gas path, and the second electromagnetic control component is used to adjust the opening degree of the second sensing valve in real time according to the oil and gas pressure of the recovery gas path.

[0009] Specifically, the first sensing valve includes: a first valve plate, a first spring, and a first valve cover;

[0010] The first valve cover is mounted on the valve seat, forming a first valve cavity between the valve cover and the valve seat; the first valve plate and the first spring are both disposed in the first valve cavity, the first valve plate is disposed between the valve seat and the first valve cover, the first spring is disposed between the valve seat and the first valve plate, the first electromagnetic control component is connected to the first valve plate, and the first electromagnetic control component adjusts the opening degree of the first sensing valve by adjusting the position of the first valve plate in the first valve cavity.

[0011] The second sensing valve includes: a second valve plate, a second spring, and a second valve cover;

[0012] The second valve cover is mounted on the valve seat, forming a second valve cavity between them; the second valve plate and the second spring are both disposed in the second valve cavity, the second valve plate is disposed between the valve seat and the second valve cover, the second spring is disposed between the valve seat and the second valve plate, the second electromagnetic control component is connected to the second valve plate, and the second electromagnetic control component adjusts the opening degree of the second sensing valve by adjusting the position of the second valve plate in the second valve cavity.

[0013] Specifically, the first electromagnetic control component includes: a first magnetic element and a first induction coil; the first magnetic element is disposed on the first valve plate, and the first induction coil is disposed outside the first valve cavity of the oil gun body; the electromagnetic attraction force of the first induction coil to attract the first magnetic element is adjusted by controlling the magnitude of the current input to the first induction coil.

[0014] The second electromagnetic control component includes: a second magnetic element and a second electromagnetic coil; the second magnetic element is disposed on the second valve plate, and the second induction coil is disposed outside the second valve cavity of the oil gun body. The electromagnetic attraction force of the second induction coil to attract the second magnetic element is adjusted by controlling the magnitude of the current input to the second induction coil.

[0015] Specifically, the first magnetic element and the second magnetic element are made of magnetic coating or iron-containing components.

[0016] Specifically, the vehicle-mounted vapor recovery compatible refueling nozzle also includes:

[0017] A first position sensor and a second position sensor are installed on the body of the oil gun;

[0018] The first position sensor is used to detect the position of the first valve plate within the first valve cavity;

[0019] The second position sensor is used to detect the position of the second valve plate within the second valve chamber.

[0020] Specifically, the first position sensor and the second position sensor are Hall sensors or laser position sensors.

[0021] Specifically, the recovered gas path includes:

[0022] A front-end recovery air passage is provided on the oil gun body and communicates with the first valve chamber.

[0023] A rear-end recovery air passage is provided on the oil gun body and communicates with the second valve chamber.

[0024] A connecting air passage is provided on the valve seat between the first valve chamber and the second valve chamber;

[0025] The connection or disconnection of the front-end recovery gas path and the connection or disconnection of the rear-end recovery gas path are achieved by adjusting the opening degree of the first sensing valve and the second sensing valve.

[0026] Specifically, a sealing element is provided between the first valve cover and the valve seat, and between the second valve cover and the valve seat.

[0027] Specifically, the vehicle-mounted vapor recovery compatible refueling nozzle also includes:

[0028] An annular adsorption disc is installed at the opening end of the gas collection hood, and the annular adsorption disc adsorbs onto the vehicle's fuel tank opening when refueling.

[0029] Specifically, the vehicle-mounted oil and gas recovery compatible refueling nozzle also includes: an air extraction pipeline, an air extraction pump, an air intake pipeline, and an air valve;

[0030] The annular adsorption disk is provided with an air inlet and an air outlet. One end of the air extraction pipe is connected to the air outlet, and the other end is connected to the air extraction port of the air pump. The air inlet is connected to the air inlet pipe. The air valve is provided on the air inlet pipe to control the opening and closing of the air inlet pipe.

[0031] The air pump extracts air from the annular adsorption disk through the air outlet and the air extraction pipeline, causing the annular adsorption disk to adhere to the vehicle's fuel tank opening.

[0032] Specifically, the outer surface of the oil gun body is provided with a groove, and the air extraction pipe and the air intake pipe are embedded in the groove.

[0033] Another aspect of the present invention provides a fuel dispenser, which is equipped with a vehicle-mounted vapor recovery compatible fuel nozzle as described above.

[0034] The vehicle-mounted vapor recovery compatible refueling nozzle provided by this invention has a first electromagnetic control component and a second electromagnetic control component respectively installed at the first and second sensing valves of the sensing assembly of the nozzle body. The first and second electromagnetic control components adjust the opening degree of the first and second sensing valves according to the oil and gas pressure flowing through the recovery gas path detected by the pressure detection device, so that the sensing coefficient of the first and second sensing valves can be flexibly adjusted. This allows the vehicle-mounted vapor recovery compatible refueling nozzle to quickly adapt to working conditions that do not match the fixed sensing coefficient. This invention also provides a refueling machine. The vehicle-mounted vapor recovery compatible refueling nozzle and refueling machine provided by this invention solve the problem in the prior art that the pressure sensing valve on the refueling nozzle has a fixed sensing coefficient and cannot adapt to the working conditions after the oil and gas pressure changes in the vapor recovery system in a timely manner, making the refueling nozzle more widely applicable, flexible, and robust.

[0035] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0036] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:

[0037] Figure 1 This is a schematic diagram of the structure of a vehicle-mounted oil and gas recovery compatible refueling nozzle provided in one embodiment of the present invention;

[0038] Figure 2 yes Figure 1 A partial cross-sectional view of the vehicle-mounted vapor recovery compatible refueling nozzle from the BB direction.

[0039] Figure 3 yes Figure 1 A cross-sectional view of a vehicle-mounted vapor recovery compatible refueling nozzle;

[0040] Figure 4 yes Figure 1 A schematic diagram of the annular adsorption plate of the vehicle-mounted oil and gas recovery compatible refueling nozzle.

[0041] Explanation of reference numerals in the attached figures

[0042] 1-Oil gun body; 2-Sensing component; 3-First electromagnetic control component; 4-Second electromagnetic control component; 5-First position sensor; 6-Second position sensor; 7-Gas collection hood; 8-Annular suction plate; 20-Valve seat; 21-First sensing valve; 22-Second sensing valve; 31-First magnetic element; 32-First induction coil; 41-Second magnetic element; 42-Second induction coil; 210-First valve plate; 211-First spring; 212-First valve cover; 213-First valve chamber; 220-Second valve plate; 221-Second spring; 222-Second valve cover; 223-Second valve chamber. Detailed Implementation

[0043] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0044] In embodiments of the present invention, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used to describe the relative positional relationships of components in relation to the directions shown in the accompanying drawings or in relation to the vertical, perpendicular, or gravitational directions.

[0045] Figure 1 This is a structural diagram of a vehicle-mounted vapor recovery compatible refueling nozzle. Figure 2 This is a partial cross-sectional view (BB) of a vehicle-mounted vapor recovery compatible refueling nozzle. Figure 3 This is a cross-sectional view of a vehicle-mounted vapor recovery compatible refueling nozzle. Figure 4 This is a schematic diagram of the annular adsorption plate of a vehicle-mounted fuel dispenser compatible with vapor recovery.

[0046] like Figures 1-4 As shown, the present invention provides a vehicle-mounted fuel nozzle compatible with vapor recovery, comprising: a fuel nozzle body 1, a gas collection hood 7 provided at the front end of the fuel nozzle body 1, and a recovery gas path connected to the secondary vapor recovery system of the gas station provided inside the fuel nozzle body 1.

[0047] A sensing component 2 is provided on the oil gun body 1. The sensing component 2 includes a valve seat 20 and a first sensing valve 21 and a second sensing valve 22 symmetrically arranged on the valve seat 20.

[0048] The pressure detection device installed on the recovery gas line is used to detect the oil and gas pressure flowing through the recovery gas line;

[0049] The first electromagnetic control component 3 and the second electromagnetic control component 4 are installed on the oil gun body 1. The first electromagnetic control component 3 is used to adjust the opening degree of the first sensing valve 21 in real time according to the oil and gas pressure of the recovery gas path. The second electromagnetic control component 4 is used to adjust the opening degree of the second sensing valve 22 in real time according to the oil and gas pressure of the recovery gas path.

[0050] The vehicle-mounted vapor recovery compatible refueling nozzle provided by this invention is equipped with a first electromagnetic control component 3 connected to a first sensing valve 21 and a second electromagnetic control component 4 connected to a second sensing valve 22. The first electromagnetic control component 3 and the second electromagnetic control component 4 adjust the opening degree of the first sensing valve 21 and the second sensing valve 22 according to the oil and gas pressure flowing through the recovery gas path detected by a pressure detection device. The pressure detection device is a pressure gauge, which is set in parallel on the recovery gas path. Through the first electromagnetic control component 3, the second electromagnetic control component 4 and the pressure detection device, the sensing coefficients of the first sensing valve 21 and the second sensing valve 22 are adjusted, enabling the vehicle-mounted vapor recovery compatible refueling nozzle to quickly adapt to working conditions where the sensing coefficients of the sensing valves do not match. This solves the problem in the prior art where the sensing coefficient of the pressure sensing valve on the refueling nozzle is fixed and cannot adapt to the working conditions after the oil and gas pressure changes in the vapor recovery system in a timely manner, making the refueling nozzle more widely applicable, flexible and robust.

[0051] In one embodiment, such as Figure 2 As shown, valve seat 20 is mounted on oil gun body 1, and first sensing valve 21 and second sensing valve 22 are symmetrically arranged on both sides of valve seat 20. The first sensing valve 21 includes: first valve plate 210, first spring 211 and first valve cover 212.

[0052] The first valve cover 212 is mounted on the valve seat 20 and forms a first valve cavity 213 with the valve seat 20; the first valve plate 210 and the first spring 211 are both disposed in the first valve cavity 213, the first valve plate 210 is disposed between the valve seat 20 and the first valve cover 212, the first spring 211 is disposed between the valve seat 20 and the first valve plate 210, the first electromagnetic control component 3 is connected to the first valve plate 210, and the first electromagnetic control component 3 adjusts the opening degree of the first sensing valve 21 by adjusting the position of the first valve plate 210 in the first valve cavity 213;

[0053] The second sensing valve 22 includes: a second valve plate 220, a second spring 221, and a second valve cover 222;

[0054] The second valve cover 222 is mounted on the valve seat 20 and forms a second valve cavity 223 with the valve seat 20; the second valve plate 220 and the second spring 221 are both disposed in the second valve cavity 223, the second valve plate 220 is disposed between the valve seat 20 and the second valve cover 222, the second spring 221 is disposed between the valve seat 20 and the second valve plate 221, the second electromagnetic control component 4 is connected to the second valve plate 220, and the second electromagnetic control component 4 adjusts the opening degree of the second sensing valve 22 by adjusting the position of the second valve plate 220 in the second valve cavity 223.

[0055] The first electromagnetic control component 3 includes: a first magnetic element 31 and a first induction coil 32; the first magnetic element 31 is disposed on the first valve plate 210, and the first induction coil 32 is disposed outside the first valve cavity 213 of the oil gun body 1. The electromagnetic attraction force of the first induction coil 32 to attract the first magnetic element 31 is adjusted by controlling the magnitude of the current input to the first induction coil 32.

[0056] The second electromagnetic control component 4 includes: a second magnetic element 41 and a second electromagnetic coil 42. The second magnetic element 41 is disposed on the second valve plate 220, and the second induction coil 42 is disposed outside the second valve chamber 223 of the oil gun body 1. The electromagnetic attraction force of the second induction coil 42 to attract the second magnetic element 41 is adjusted by controlling the magnitude of the current input to the second induction coil 42.

[0057] The first magnetic element 31 and the second magnetic element 41 are made of magnetic coating or iron-containing components.

[0058] The recovery air path includes: a front recovery air path disposed on the oil gun body 1 and communicating with the first valve chamber 210; a rear recovery air path disposed on the oil gun body 1 and communicating with the second valve chamber 220; a connecting air path disposed on the valve seat 20 and located between the first valve chamber 210 and the second valve chamber 220; the front recovery air path and the connecting air path are connected or disconnected by adjusting the opening degree of the first sensing valve 21 and the second sensing valve 22, and the rear recovery air path and the connecting air path are connected or disconnected.

[0059] like Figure 2As shown, in the vehicle-mounted vapor recovery compatible refueling nozzle provided by the present invention, the sensing component 2 is a two-stage valve, including a first sensing valve 21 and a second sensing valve 22. A first through hole is provided on the side of the valve seat 20 where the first sensing valve 21 is installed, and a second through hole is provided on the side of the valve seat 20 where the second sensing valve 22 is installed. The connecting air passage is connected or disconnected to the first valve cavity 213 through the first through hole, and simultaneously connected or disconnected to the second valve cavity 223 through the second through hole. A first valve plate 210 is disposed in the first valve cavity 213 defined by the first valve cover 212 and the valve seat 20. A first spring 211 is disposed between the first valve plate 210 and the valve seat 20 and is connected to both the first valve plate 210 and the valve seat 20 respectively. A second valve plate 220 is disposed in the second valve cavity 223 defined by the second valve cover 222 and the valve seat 20. A second spring 221 is disposed between the second valve plate 220 and the valve seat 20 and is connected to both the second valve plate 220 and the valve seat 20 respectively. The first spring 211 exerts its elastic force on the first valve plate 210, causing the first valve plate 210 to move away from the first through hole. The second spring 221 exerts its elastic force on the second valve plate 220, causing the second valve plate 220 to move away from the second through hole. The first valve plate 210 and the second valve plate 220 are subjected to sufficient pressure to overcome the elastic forces of the first spring 211 and the second spring 221, thus correspondingly blocking the first through hole and the second through hole. In the application, when the vacuum pump in the secondary oil and gas recovery system of the gas station is pumping air, it will apply pressure to the first valve plate 210 and the second valve plate 220. The elastic coefficients of the first spring 211 and the second spring 221 are fixed, so the pressure to overcome the first spring 211 and the second spring 221 is also fixed. That is, the pressure sensing coefficients of the first sensing valve 21 and the second sensing valve 22 are fixed values. When the first through hole and the second through hole are blocked, the connecting air path is disconnected from the first valve chamber 213 and the connecting air path is disconnected from the second valve chamber 223.

[0060] In one embodiment, the secondary vapor recovery system at the gas station is configured by default with a type A vacuum pump, which has a relatively low vacuum level. Two test vehicles are set up: test vehicle one without a vapor recovery system and test vehicle two with a vapor recovery system. The elastic coefficient of the first sensing valve 21 is set to P10, and the elastic coefficient of the second sensing valve 22 is set to P20. At this time, the sensing valve assembly 2 identifies whether the vehicle has a properly functioning vapor recovery system. The type A vacuum pump has a relatively low vacuum level (i.e., the pumping capacity of a type A vacuum is weak). When the vapor recovery-compatible refueling nozzle refuels test vehicle one (which does not have a vapor recovery system), after N seconds of refueling, the stable vacuum level in the secondary vapor recovery system reaches Pd1. The first valve chamber 213 of the first sensing valve 21 and the second valve chamber 223 of the second sensing valve 22 are both under positive pressure. That is, the first valve plate 210 in the first sensing valve 21 approaches or abuts the first valve cover 212 under the action of the first spring 211, while the second valve plate 223 in the second sensing valve 22 is under pressure under the action of the second spring 211. Under the action of 21, the fuel tank opening approaches or abuts the second valve cover 222. At this time, the first and second through holes are not blocked by the first valve plate 210 and the second valve plate 220, and fuel vapor overflows from the fuel tank opening. The fuel vapor enters the first valve chamber 213 through the front recovery air passage, then enters the second valve chamber 223 through the connecting air passage from the first valve chamber 213, and finally enters the secondary fuel vapor recovery system of the gas station through the rear recovery air passage from the second valve chamber 223. When the vehicle-mounted fuel vapor recovery compatible fuel nozzle refuels the test vehicle with the vehicle-mounted fuel vapor recovery system, it starts refueling for N seconds. The stable vacuum level in the secondary vapor recovery system at the gas station is Pd2, and no vapor overflows from the fuel tank opening. At this time, under the suction of the type A vacuum pump, the first valve chamber 213 is under negative pressure. The first valve plate 210 compresses the first spring 211 under this negative pressure to seal the first through hole. The second valve plate 220, influenced by the suction of the type A vacuum pump, does not seal the second through hole and remains partially open. Thus, the vapor bypasses the recovery gas path and is directly absorbed by the onboard vapor recovery system of the second test vehicle, where it is processed. After a period of use, the type A vacuum pump fails and requires repair. At this time, a type B vacuum pump with a higher vacuum level (i.e., stronger pumping capacity) is replaced in the secondary vapor recovery system. The change in the vacuum pump's pumping capacity causes an abnormal increase in the vacuum level in the secondary vapor recovery system. Therefore, the onboard vapor recovery compatible fuel nozzle needs to be recalibrated to adapt to the new operating conditions.

[0061] First, a test vehicle was used to calibrate a vehicle-mounted vapor recovery compatible refueling nozzle. Test vehicle 1 was a vehicle without an onboard vapor recovery system. When refueling test vehicle 1, after N seconds, the stable vacuum value was Pe1, where Pe1 > Pd1. At this time, the first sensing valve 1 and the second sensing valve 2 closed under the suction of the type B vacuum pump, resulting in a gas-liquid ratio lower than the normal 1.0-1.2. At this point, the first sensing valve 21 and the second sensing valve 22 were in an abnormal vacuum sensing state. Therefore, the opening degree of the first sensing valve 21 and the second sensing valve 22 needed to be recalibrated to adapt to the new operating conditions, so that the vapor could ultimately enter the secondary vapor recovery system of the refueling station. To adjust the opening degree of the first sensing valve 21 and the second sensing valve 22 to adapt to the new operating conditions, the sensing coefficients of the first sensing valve 21 and the second sensing valve 22 needed to be adjusted, i.e., adjusting the first spring 211 and the second sensing valve 22 of the first sensing valve 21. The elastic coefficient of the second spring 221 of valve 22 can be changed by replacing the spring. However, it is not practical to replace the spring of the sensing valve at any time in actual application. Therefore, in this application, an electromagnetic coil is energized to generate a pulling force to assist the first sensing valve 21 and the second sensing valve 22 in adjusting the sensing coefficient. The first valve plate 210 and the second valve plate 220 are usually made of rubber material. Magnetic coatings are applied to the first valve plate 210 of the first sensing valve 21 and the second valve plate 220 of the second sensing valve 22, or iron-containing components are provided. For example, iron-containing components are provided, which are iron sheets. Iron sheets are attached to the first valve plate 210 and the second valve plate 220, respectively. The first electromagnetic coil 32 and the second electromagnetic coil 42 are respectively provided outside the first valve cavity 213 and the second valve cavity 223. The current to the first electromagnetic coil 32 and / or the second electromagnetic coil 42 is controlled according to the oil and gas pressure detected by the pressure detection device. In practical applications, the sensing coefficient of the second sensing valve 22, which is closer to the vacuum pump, is first adjusted. After the second valve plate 220 of the second sensing valve 22 is confirmed to be open, the sensing coefficient of the first sensing valve 21, which is farther from the vacuum pump, is then adjusted.

[0062] When the first electromagnetic coil 32 is energized, it generates a magnetic attraction force to attract the magnetic coating or iron-containing component coated on the first valve plate 210, causing the first valve plate 210 to move closer to or adhere to the first valve cover 212. This changes the position of the first valve plate 210 within the first valve cavity 213, adjusting the opening degree of the first sensing valve 21. Controlling the magnitude of the magnetic attraction force can adjust the opening degree of the first sensing valve 21. Similarly, when the second electromagnetic coil 42 is energized, it generates a magnetic attraction force to attract the magnetic coating or iron-containing component coated on the second valve plate 220, causing the second valve plate 220 to move closer to or adhere to the second valve cover 222. This changes the position of the second valve plate 220 within the second valve cavity 223. The opening degree of the sensing valve 22 is adjusted. Similarly, the magnetic attraction force generated by the second electromagnetic coil 42 can be controlled to adjust the opening degree of the second sensing valve 22. When the first sensing valve 21 and the second sensing valve 22 are open, the oil and gas can smoothly enter the secondary oil and gas recovery system of the gas station. After replacing the B-type vacuum pump, before refueling vehicles that are not equipped with an on-board oil and gas recovery system, the first sensing valve 21 and the second sensing valve 22 of the on-board oil and gas recovery compatible refueling gun are recalibrated by the first electromagnetic control component 3 and the pressure detection device to avoid the failure of the sensing recognition and gas-liquid ratio control functions of the on-board oil and gas recovery compatible refueling gun for vehicles that are not equipped with an on-board oil and gas recovery system.

[0063] When refueling a vehicle equipped with an onboard vapor recovery system using a vehicle-mounted vapor recovery compatible refueling nozzle, the vapors will directly enter the vehicle's built-in vapor recovery system for recovery, with no vapors overflowing from the fuel tank opening. After replacing the B-type vacuum pump, the first sensing valve 21 and the second sensing valve 22 were adjusted using the same method described above when refueling test vehicle one. It is assumed that the sensing coefficient of the second sensing valve 22, which is closer to the B-type vacuum pump, has already been adjusted. Therefore, the second sensing valve 22 will not be adjusted again when refueling test vehicle two using the vehicle-mounted vapor recovery compatible refueling nozzle. Here, the sensing coefficient of the first sensing valve 21, which is farther from the B-type vacuum pump, is adjusted mainly based on the changes in vapor pressure during refueling of test vehicle two.

[0064] The first sensing valve 1 and the second sensing valve 2 are closed under the suction of the type B vacuum pump. The sensing coefficient of the first sensing valve 21 of the vehicle-mounted vapor recovery compatible refueling gun needs to be recalibrated under this working condition to ensure that the first sensing valve 21 is in the normal closed state and the second sensing valve 22 is in the normal open state under this working condition. First, the opening / closing state of the first sensing valve 21 is determined. If the first sensing valve 21 is closed, it is in normal condition. The second electromagnetic control component 4 adjusts the opening degree of the second sensing valve 22 according to the oil and gas pressure detected by the pressure detection device in the recovery gas path, making the distance between the second valve plate 220 of the second sensing valve 22 and the second through hole greater. This allows the suction force of the B-type vacuum pump to attract the first valve plate 210 of the first sensing valve 21 to adhere more tightly to the first through hole, making the closed state of the first sensing valve 21 more stable. Adjusting the opening degree of the second sensing valve 22 by the second electromagnetic control component 4 can regulate the gas-liquid ratio of the recovery gas path. If both the first sensing valve 21 and the second sensing valve 22 are open, the second electromagnetic control component 4 adjusts the opening degree of the second sensing valve 22 according to the oil and gas pressure detected by the pressure detection device in the recovery gas path to further assist the second valve plate 220 of the second sensing valve 22 in moving further away from the second through hole. The hole is further away, resulting in a larger opening and closing degree of the second sensing valve 220. This increases the suction force exerted by the type B vacuum pump on the first sensing valve 21, causing the first sensing valve 21 to close. Thus, when refueling vehicles equipped with an on-board vapor recovery system, the first sensing valve 21 is in a normally closed state, and the second sensing valve 22 is in a normally open state. After replacing the type B vacuum pump, the first sensing valve 21 of the on-board vapor recovery compatible refueling nozzle is recalibrated before refueling vehicles with an on-board vapor recovery system. In this way, even if the vacuum level of the secondary vapor recovery system at the gas station changes due to the replacement of the vacuum pump, the opening and closing degree of the first sensing valve 21 of the on-board vapor recovery compatible refueling nozzle can be recalibrated by the first electromagnetic control component 3 and the second electromagnetic control component 4 based on the vapor pressure of the recovery gas path detected by the pressure detection device, so that it can match the current working conditions, making the on-board vapor recovery compatible refueling nozzle more widely applicable and robust.

[0065] In another embodiment, the second electromagnetic control component 4 is provided only at the second sensing valve 22, and the elastic coefficient of the first sensing valve 21 is fixed. When the vacuum pump in the secondary oil and gas recovery system of the gas station is replaced or the components in the secondary oil and gas recovery system of the gas station are replaced, causing the vacuum degree of the secondary oil and gas recovery system of the gas station to change, the second sensing valve 22 is recalibrated by the cooperation of the second electromagnetic control component 4 and the pressure detection device. The calibration method of the second sensing valve 22 is the same as the calibration method in the above embodiment.

[0066] In another embodiment, multiple sensing valves can be installed in the vehicle-mounted vapor recovery compatible refueling nozzle, and multiple pressure detection devices can be installed on the recovery gas line or the secondary vapor recovery system of the gas station to detect the vapor pressure. A corresponding number of electromagnetic control components can also be installed. When the vacuum level of the secondary vapor recovery system of the gas station changes due to the replacement of the vacuum pump or other components, the corresponding sensing valves can be recalibrated through the corresponding pressure detection devices and electromagnetic control components. The calibration method for the sensing valves is the same as the calibration method in the above embodiment.

[0067] When recalibrating the first sensing valve 21 and the second sensing valve 22 of the vehicle-mounted vapor recovery compatible refueling nozzle, in order to detect the position of the first valve plate 210 in the first valve chamber 213 in the first sensing valve 21 and the position of the second valve plate 220 in the second valve chamber 223 in the second sensing valve 22, the vehicle-mounted vapor recovery compatible refueling nozzle further includes: a first position sensor 5 and a second position sensor 6 disposed on the nozzle body 1.

[0068] The first position sensor 5 is used to detect the position of the first valve plate 10 within the first valve cavity 213;

[0069] The second position sensor 6 is used to detect the position of the second valve plate 220 within the second valve chamber 223.

[0070] The first position sensor 5 and the second position sensor 6 are Hall sensors or laser position sensors.

[0071] The first position sensor 5 detects the position of the first valve plate 210 in the first valve chamber 213, and the second position sensor 6 detects the position of the second valve plate 220 in the second valve chamber 223. This facilitates the staff in determining the opening degree of the first sensing valve 21 and the second sensing valve 22, and improves the calibration efficiency of the first sensing valve 21 and the second sensing valve 22.

[0072] To prevent oil and gas entering the first valve chamber 213 from overflowing through the gap between the first valve cover 212 and the valve seat 20, or oil and gas entering the second valve chamber 223 from overflowing through the gap between the second valve cover 222 and the valve seat 20, sealing elements are provided between the first valve cover 212 and the valve seat 20, as well as between the second valve cover 222 and the valve seat 20. The sealing elements not only prevent oil and gas from overflowing and polluting the environment, but also ensure that the vacuum level in the recovery gas path remains stable.

[0073] When refueling a vehicle's fuel tank using a vehicle-mounted vapor recovery compatible refueling nozzle, vapors are generated. The vapor collection hood 7 of the vehicle-mounted vapor recovery compatible refueling nozzle can effectively prevent vapor leakage. Usually, there is no fixing device between the vapor collection hood 7 and the fuel tank. In order to prevent the vehicle-mounted vapor recovery compatible refueling nozzle from falling off during refueling and causing vapor leakage, the vehicle-mounted vapor recovery compatible refueling nozzle also includes an annular adsorption plate 8 set at the opening end of the vapor collection hood 7. The annular adsorption plate 8 is adsorbed onto the vehicle's fuel tank opening during refueling.

[0074] like Figure 4 As shown, the cross-section of the annular adsorption plate 8 is an inverted bowl shape, and the annular adsorption plate 8 is made of rubber material. During the refueling process, the annular adsorption plate 8, located on the side of the vent 7 facing the vehicle's fuel tank, adsorbs the vent 7 onto the fuel tank, as shown. Figure 3 As shown, one end of the opening of the annular adsorption plate 8 is positioned away from the gas collection hood 7. This way, the annular adsorption plate 8 can prevent the fuel nozzle from falling off and causing fuel leakage. The annular adsorption plate 8 is positioned around the fuel tank opening of the vehicle's fuel tank. While adsorbing onto the vehicle's fuel tank, it can also play a good sealing role, thereby preventing fuel from overflowing from the gap between the gas collection hood 7 and the vehicle's fuel tank.

[0075] During refueling, in order to ensure that the annular adsorption plate 8 can firmly adhere to the fuel tank opening of the vehicle, the vehicle-mounted vapor recovery compatible refueling nozzle also includes an air extraction pipe, an air extraction pump, an air intake pipe, and an air valve. The annular adsorption plate 8 is provided with an air inlet and an air outlet. One end of the air extraction pipe is connected to the air outlet, and the other end is connected to the air extraction port of the air extraction pump. The air inlet is connected to the air intake pipe, and the air valve is located on the air intake pipe to control the opening and closing of the air intake pipe. When the annular adsorption plate 8 is attached to the fuel tank opening of the vehicle, the air extraction pump can extract the air inside the annular adsorption plate 8 through the air outlet and the air extraction pipe, causing the annular adsorption plate 8 to adhere to the fuel tank opening of the vehicle. When refueling with the vehicle-mounted vapor recovery compatible refueling nozzle, the annular adsorption plate 8 initially adheres to the vehicle's fuel tank, forming an air chamber between the annular adsorption plate 8 and the vehicle's fuel tank. The air pump continuously extracts air from the air chamber through the air outlet and air extraction pipeline, creating a pressure difference between the inside and outside of the air chamber. The atmospheric pressure outside the air chamber causes the annular adsorption plate 8 to firmly adhere to the vehicle's fuel tank. When refueling is complete and the vehicle-mounted vapor recovery compatible refueling nozzle needs to be removed, the air valve is opened, and air enters the air chamber through the air inlet through the air inlet pipeline. The air pressure inside the air chamber gradually balances with the air pressure outside the air chamber, at which point the annular adsorption plate 8 can be easily separated from the vehicle's fuel tank.

[0076] To avoid inconvenience caused by the air extraction and intake pipes to the use of the vehicle-mounted vapor recovery compatible refueling nozzle, a groove is provided on the outer surface of the nozzle body 1, and the air extraction and intake pipes are embedded in the groove.

[0077] Another aspect of the present invention provides a fuel dispenser, which is equipped with the above-mentioned vehicle-mounted vapor recovery compatible fuel nozzle.

[0078] The vehicle-mounted vapor recovery compatible refueling nozzle provided by this invention has a first electromagnetic control component and a second electromagnetic control component respectively installed at the first and second sensing valves of the sensing assembly of the nozzle body. The first and second electromagnetic control components adjust the opening degree of the first and second sensing valves according to the oil and gas pressure flowing through the recovery gas path detected by the pressure detection device, so that the sensing coefficient of the first and second sensing valves can be flexibly adjusted. This allows the vehicle-mounted vapor recovery compatible refueling nozzle to quickly adapt to working conditions that do not match the fixed sensing coefficient. This invention also provides a refueling machine. The vehicle-mounted vapor recovery compatible refueling nozzle and refueling machine provided by this invention solve the problem in the prior art that the pressure sensing valve on the refueling nozzle has a fixed sensing coefficient and cannot adapt to the working conditions after the oil and gas pressure changes in the vapor recovery system in a timely manner, making the refueling nozzle more widely applicable, flexible, and robust.

[0079] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0080] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0081] Those skilled in the art will understand that all or part of the steps in the methods of the above embodiments can be implemented by a program instructing related hardware. This program is stored in a storage medium and includes several instructions to cause a microcontroller, chip, or processor to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0082] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the embodiments of the present invention, they should also be regarded as the content disclosed by the embodiments of the present invention.

Claims

1. A vehicle-mounted fuel nozzle compatible with vapor recovery, characterized in that, The vehicle-mounted vapor recovery compatible refueling nozzle includes: The oil gun body (1) is provided with a gas collection hood (7) at the front end of the oil gun body (1), and a recovery gas path connected to the secondary oil and gas recovery system of the gas station is provided inside the oil gun body (1). A sensing component (2) is provided on the oil gun body (1). The sensing component (2) includes a valve seat (20) and a first sensing valve (21) and a second sensing valve (22) symmetrically arranged on the valve seat (20). The pressure detection device installed on the recovery gas line is used to detect the oil and gas pressure flowing through the recovery gas line; The first electromagnetic control component (3) and the second electromagnetic control component (4) are installed on the oil gun body (1). The first electromagnetic control component (3) is used to adjust the opening degree of the first sensing valve (21) in real time according to the oil and gas pressure of the recovery gas path. The second electromagnetic control component (4) is used to adjust the opening degree of the second sensing valve (22) in real time according to the oil and gas pressure of the recovery gas path. The vehicle-mounted vapor recovery compatible refueling nozzle also includes: The air extraction pipeline, air extraction pump, air intake pipeline and air valve, and an annular adsorption disk (8) provided at the opening end of the air collection hood (7), wherein the annular adsorption disk (8) is adsorbed on the vehicle fuel tank opening in the refueling state. The annular adsorption disk (8) is provided with an air inlet and an air outlet. One end of the air extraction pipe is connected to the air outlet, and the other end is connected to the air extraction port of the air pump. The air inlet is connected to the air inlet pipe. The air valve is provided on the air inlet pipe to control the opening and closing of the air inlet pipe. The air pump extracts air from the annular adsorption disk (8) through the air outlet and the air extraction pipeline, causing the annular adsorption disk (8) to adhere to the vehicle's fuel tank opening.

2. The vehicle-mounted vapor recovery compatible refueling nozzle according to claim 1, characterized in that, The first sensing valve (21) includes: a first valve plate (210), a first spring (211), and a first valve cover (212); The first valve cover (212) is mounted on the valve seat (20) and forms a first valve cavity (213) between the valve cover (20); the first valve plate (210) and the first spring (211) are both disposed in the first valve cavity (213), the first valve plate (210) is disposed between the valve seat (20) and the first valve cover (212), the first spring (211) is disposed between the valve seat (20) and the first valve plate (210), the first electromagnetic control component (3) is connected to the first valve plate (210), and the first electromagnetic control component (3) adjusts the opening degree of the first sensing valve (21) by adjusting the position of the first valve plate (210) in the first valve cavity (213); The second sensing valve (22) includes: a second valve plate (220), a second spring (221), and a second valve cover (222); The second valve cover (222) is mounted on the valve seat (20) and forms a second valve cavity (223) between the valve cover (20); the second valve plate (220) and the second spring (221) are both disposed in the second valve cavity (223), the second valve plate (220) is disposed between the valve seat (20) and the second valve cover (222), the second spring (221) is disposed between the valve seat (20) and the second valve plate (220), the second electromagnetic control component (4) is connected to the second valve plate (220), and the second electromagnetic control component (4) adjusts the opening degree of the second sensing valve (22) by adjusting the position of the second valve plate (220) in the second valve cavity (223).

3. The vehicle-mounted vapor recovery compatible refueling nozzle according to claim 2, characterized in that, The first electromagnetic control component (3) includes: a first magnetic element (31) and a first induction coil (32); the first magnetic element (31) is disposed on the first valve plate (210), and the first induction coil (32) is disposed outside the first valve chamber (213) of the oil gun body (1). The electromagnetic attraction force of the first induction coil (32) to attract the first magnetic element (31) is adjusted by controlling the magnitude of the current input to the first induction coil (32); The second electromagnetic control component (4) includes: a second magnetic element (41) and a second induction coil (42); the second magnetic element (41) is disposed on the second valve plate (220), and the second induction coil (42) is disposed outside the second valve chamber (223) of the oil gun body (1). The electromagnetic attraction force of the second induction coil (42) to attract the second magnetic element (41) is adjusted by controlling the magnitude of the current input to the second induction coil (42).

4. The vehicle-mounted vapor recovery compatible refueling nozzle according to claim 3, characterized in that, The first magnetic element (31) and the second magnetic element (41) are made of magnetic coating or iron-containing components.

5. The vehicle-mounted vapor recovery compatible refueling nozzle according to claim 2, characterized in that, Also includes: A first position sensor (5) and a second position sensor (6) are installed on the oil gun body (1); The first position sensor (5) is used to detect the position of the first valve plate (210) within the first valve cavity (213); The second position sensor (6) is used to detect the position of the second valve plate (220) in the second valve chamber (223).

6. The vehicle-mounted vapor recovery compatible refueling nozzle according to claim 5, characterized in that, The first position sensor (5) and the second position sensor (6) are Hall sensors or laser position sensors.

7. The vehicle-mounted vapor recovery compatible refueling nozzle according to claim 2, characterized in that, The recovered gas path includes: A front-end recovery air passage is provided on the oil gun body (1) and communicates with the first valve chamber (213); A rear-end recovery gas path is provided on the oil gun body (1) and communicates with the second valve chamber (223); A connecting air passage is provided on the valve seat (20) between the first valve chamber (213) and the second valve chamber (223); The opening and closing degrees of the first sensing valve (21) and the second sensing valve (22) are adjusted to connect or disconnect the front-end recovery gas path from the connecting gas path, and to connect or disconnect the rear-end recovery gas path from the connecting gas path.

8. The vehicle-mounted vapor recovery compatible refueling nozzle according to claim 2, characterized in that, A seal is provided between the first valve cover (212) and the valve seat (20) and between the second valve cover (222) and the valve seat (20).

9. The vehicle-mounted vapor recovery compatible refueling nozzle according to claim 1, characterized in that, The outer surface of the oil gun body (1) is provided with a groove, and the air extraction pipe and the air intake pipe are embedded in the groove.

10. A refueling machine, characterized in that, The fuel dispenser is equipped with a vehicle-mounted vapor recovery compatible fuel nozzle as described in any one of claims 1-9.

Images