ORVR vapor recovery dispensing gun with evr function

Abstract

The utility model provides a kind of ORVR oil gas recovery fuel dispenser with EVR function, it is related to gas station equipment technical field, and this fuel dispenser aims at solving the problem that the fuel dispenser of existing compatible vehicle-mounted oil gas recovery system is caused by not tight enough sealing to lead to low oil gas recovery efficiency.The device includes gun body, sealing assembly, valve body, locking mechanism, trigger assembly and linkage mechanism, sealing assembly is retractably arranged on the oil nozzle assembly of gun body, and sealing assembly is used to abut with vehicle fuel port to form sealing;Trigger assembly is connected with locking mechanism, trigger assembly is used to drive valve body to open, locking mechanism is arranged on gun body, one end of linkage mechanism is connected with sealing assembly, the other end is connected with locking mechanism, and linkage mechanism is used to transmit the movement of sealing assembly to locking mechanism.The utility model realizes the connection between sealing assembly and trigger assembly by mechanical linkage mechanism, to ensure that only after fuel dispenser is placed to correct position can refueling begin.

Description

Technical Field

[0001] This utility model relates to the field of gas station equipment technology, and in particular to an ORVR (Oriented Refueling Vapor Recovery) fuel nozzle with EVR (Electronic Vapor Recovery) function. Background Technology

[0002] In the daily operation of gas stations, volatile organic compounds (VOCs) from gasoline are one of the main sources of air pollution. To control the vapors generated during refueling, secondary vapor recovery systems are widely used. Traditional vacuum-assisted secondary vapor recovery systems use a vacuum pump installed inside the fuel dispenser to draw the vapors displaced from the fuel tank during refueling back to the underground storage tank at the gas station. However, to ensure effective vapor recovery, the pumping volume of these systems is usually set greater than the amount of fuel dispensed, i.e., a vapor-to-liquid ratio greater than 1.0. This can lead to increased pressure inside the storage tank. When the pressure exceeds a threshold, the vapors are released into the atmosphere through the tank's breather valve, causing secondary pollution and fuel loss.

[0003] With increasingly stringent environmental regulations, newly manufactured vehicles are required to be equipped with onboard vapor recovery systems (ORVR). This system utilizes devices such as a carbon canister onboard to absorb the vapors generated during refueling, theoretically eliminating the need for auxiliary vapor extraction systems at gas stations. Therefore, gas stations need to adopt refueling equipment that is compatible with both new ORVR vehicles and existing non-ORVR vehicles.

[0004] Existing technologies include fuel nozzles compatible with ORVR vehicles, typically incorporating a pressure sensor in the vapor recovery channel. When refueling an ORVR vehicle, this sensor detects the negative pressure generated at the fuel filler neck due to the ORVR system's operation and automatically reduces or closes the vapor recovery channel to maintain a low vapor-to-liquid ratio. However, in practice, it has been found that even when refueling ORVR vehicles, if the operator fails to insert the fuel nozzle fully and correctly into the fuel filler neck, resulting in a gap between the nozzle and the neck, a large amount of outside air can be drawn in. This not only disrupts the negative pressure environment required for the ORVR system's normal operation but also causes the pressure sensor to misjudge the negative pressure, continuing to maintain or even increase the vacuum pump's suction volume. This leads to a vapor-to-liquid ratio far exceeding the normal range, significantly diminishing the energy-saving and emission-reduction effects of the ORVR system and failing to fundamentally solve the problem. Utility Model Content

[0005] The purpose of this invention is to provide an ORVR (Autonomous Refueling and Vapor Recovery) refueling nozzle with EVR (Electronic Vapor Recovery) function. This addresses the technical problem in existing refueling nozzles compatible with onboard refueling vapor recovery systems that can still dispense fuel even when failing to form an effective seal with the vehicle's fuel filler neck. This allows outside air to be drawn in, disrupting the operating conditions of the onboard refueling vapor recovery system and resulting in an excessively high vapor-liquid ratio, thus failing to achieve the desired environmental protection effect. The various technical effects of the preferred solutions provided by this invention are detailed below.

[0006] To achieve the above objectives, the present invention provides the following technical solution: This utility model provides an ORVR (Organic Vapor Recovery) refueling nozzle with EVR (Electronic Fuel Recovery) function, comprising a nozzle body, a sealing assembly, a valve body, a locking mechanism, a trigger assembly, and a linkage mechanism. The sealing assembly is retractably mounted on the nozzle body's nozzle assembly and is used to form a seal with the vehicle's refueling port. The valve body and the locking mechanism are both located within the nozzle body. The trigger assembly is connected to the locking mechanism and is used to drive the valve body to open. The locking mechanism is mounted on the nozzle body. One end of the linkage mechanism is connected to the sealing assembly, and the other end is connected to the locking mechanism. The linkage mechanism is used to transmit the movement of the sealing assembly to the locking mechanism. Specifically, when the sealing assembly is in a first position representing that no effective seal has been formed with the vehicle's fuel filler neck, the locking mechanism is in a locked position to prevent the valve body from opening. When the sealing assembly is pushed by the vehicle's fuel filler neck to a second position representing that an effective seal has been formed, the linkage mechanism drives the locking mechanism to move to an unlocked position to allow the valve body to open.

[0007] Preferably, the linkage mechanism includes a pushing component and a locking part. One end of the pushing component is connected to the sealing component, and the other end is connected to the locking part. The locking part is disposed on one side of the locking mechanism. When the sealing component is in the first position, the locking part locks the locking mechanism. When the sealing component is in the second position, the locking part unlocks the locking mechanism.

[0008] Preferably, the pushing assembly includes a first pushing rod, a movable plate, and a second pushing rod. The first pushing rod is slidably disposed on the gun body. One end of the first pushing rod is connected to the sealing assembly, and the other end is close to the movable plate. The first pushing rod can push the movable plate to move. One end of the second pushing rod is connected to the movable plate, and the other end is connected to the locking part.

[0009] Preferably, the pushing assembly further includes a pusher plate, which is annular and disposed within the sealing assembly.

[0010] Preferably, the locking part includes a guillotine and a reset member. One end of the guillotine is rotatably connected to the locking mechanism, and the other end is hinged to the pushing assembly. The guillotine and the locking mechanism are connected through the reset member, which has a tendency force to drive the guillotine to lock the locking mechanism.

[0011] Preferably, the locking mechanism includes a diaphragm assembly. When the sealing assembly is in the first position, the cutter is located on the stroke of the diaphragm assembly, and the cutter prevents the diaphragm assembly from descending. When the sealing assembly is in the second position, the cutter is located on one side of the stroke of the diaphragm assembly, and the diaphragm assembly can descend.

[0012] Preferably, the movable disc is C-shaped, and both ends of the movable disc are hinged to the gun body.

[0013] Preferably, one end of the trigger assembly is connected to the bottom of the locking mechanism, the trigger assembly abuts against the bottom of the valve stem of the valve body, and a hook assembly is provided near the other end of the trigger assembly, the hook assembly being able to hook the trigger assembly.

[0014] The application employs the above technical solution and has at least the following beneficial effects: Through the mechanical interlocking relationship between the sealing components, locking mechanism, and linkage mechanism, the operator is forced to correctly insert the refueling nozzle into the vehicle's refueling port and form an effective seal before opening the valve to dispense fuel. This fundamentally solves the problem of incomplete sealing caused by improper operation, ensuring that the vapor-liquid ratio of fuel recovery is stably maintained at a low level when refueling vehicles equipped with onboard refueling vapor recovery systems, significantly improving vapor recovery efficiency and guaranteeing environmental benefits. Simultaneously, this design adds a physical safety lock, locking the valve body when the refueling nozzle is not correctly inserted, effectively preventing the risk of fuel dispensing due to accidental trigger activation caused by improper nozzle insertion or accidental collision, thus enhancing the safety of refueling operations. Furthermore, the forced sealing mechanism can be designed as a detachable modular component, allowing the refueling nozzle to be flexibly configured between standard refueling nozzles compatible with onboard refueling vapor recovery systems and more powerful forced-sealing nozzles, meeting the needs of different markets and customers while balancing cost and functionality.

[0015] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a cross-sectional structural diagram of an ORVR (Oriented Refrigerant Regulator) fuel nozzle with EVR function provided in an embodiment of this utility model. Figure 2 This is a schematic diagram of the internal structure of an ORVR (Oriented Refrigerant Regulator) fuel nozzle with EVR function provided in this embodiment of the present invention. Figure 3 This is a schematic diagram of the overall structure of the ORVR oil and gas recovery refueling gun with EVR function provided in this embodiment of the utility model; Figure 4 This is a schematic diagram of the ORVR (Oriented Refrigerant Regulator) fuel nozzle with EVR function and top cover removal structure provided in this embodiment of the present invention.

[0018] In the figure: 1. Gun body; 2. Sealing assembly; 3. Valve body; 4. Locking mechanism; 5. Trigger assembly; 6. Linkage mechanism; 7. First push rod; 8. Moving plate; 9. Second push rod; 10. Push plate; 11. Guillotine; 12. Reset component; 13. Diaphragm assembly; 14. Hook assembly. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] A specific embodiment of this utility model provides an ORVR (Enhanced Vapor Recovery) refueling nozzle with EVR function. EVR is an abbreviation for Enhanced Vapor Recovery, which integrates a forced sealing function and compatibility with the vehicle refueling vapor recovery system to ensure the sealing of the refueling operation, thereby ensuring the efficiency of vapor recovery and improving safety.

[0021] Specifically, it includes the gun body 1, sealing assembly 2, valve body 3, locking mechanism 4, trigger assembly 5, and linkage mechanism 6. The nozzle body 1 extends from the front end to a nozzle assembly for insertion into the vehicle's fuel filler neck. As the final channel for fuel flow, it is typically made of high-strength aluminum alloy or stainless steel to resist wear and chemical corrosion during refueling. A sealing assembly 2 is telescopically mounted on the nozzle assembly of the nozzle body 1. The sealing assembly 2 can slide along the axial direction of the nozzle assembly and is used to form a seal with the vehicle's fuel filler neck. The front end of the gas cover assembly is typically provided with a sealing ring or gas cover made of an elastomer (e.g., using oil-resistant materials such as nitrile rubber or fluororubber) to form a flexible and reliable sealing interface when in contact with the vehicle's fuel filler neck.

[0022] Both the valve body 3 and the locking mechanism 4 are located inside the nozzle body 1. The valve body 3 is the main control mechanism for controlling the flow of gasoline in the nozzle. The trigger assembly 5 is connected to the locking mechanism 4 and is used to drive the valve body 3 to open. The locking mechanism 4 is located on the nozzle body 1. One end of the linkage mechanism 6 is connected to the sealing assembly 2 and the other end is connected to the locking mechanism 4. The linkage mechanism 6 is used to transmit the movement of the sealing assembly 2 to the locking mechanism 4. The sealing assembly 2, the linkage mechanism 6 and the locking mechanism 4 are designed to achieve a forced mechanical mechanism that ensures "no oil flow without sealing".

[0023] When the sealing assembly 2 is in the first position, which represents that no effective seal has been formed with the vehicle's fuel filler neck, the locking mechanism 4 is in the locked position to prevent the valve body 3 from opening. When the sealing assembly 2 is pushed by the vehicle's fuel filler neck to the second position, which represents that an effective seal has been formed, the linkage mechanism 6 drives the locking mechanism 4 to move to the unlocked position to allow the valve body 3 to open.

[0024] In its initial state, the sealing assembly 2 is in its fully extended first position under the action of its internal return spring. At this time, the linkage mechanism 6, which is fixed to the rear end of the sealing assembly 2, is also in its initial stationary state. Specifically, the linkage mechanism 6 includes a pushing component and a locking component. One end of the pushing component is connected to the sealing assembly 2, and the other end is connected to the locking component. The locking component is located on one side of the locking mechanism 4. When the sealing assembly 2 is in the first position, the locking component locks the locking mechanism 4. When the sealing assembly 2 is in the second position, the locking component unlocks the locking mechanism 4. The pushing component can transmit the action to the locking component when the sealing assembly 2 is in motion, and the locking component is used to lock the locking mechanism 4, thereby ensuring that the trigger assembly 5 cannot be pulled to perform lubrication. When the sealing assembly 2 has sufficient action to drive the pushing component to move, it can push the locking component to move, thereby unlocking the locking component from the locking mechanism 4, thus ensuring that the trigger assembly 5 can be pulled to perform lubrication.

[0025] In specific embodiments of this application, as shown in the appendix Figure 2As shown, the pushing assembly includes a first pushing rod 7, a moving plate 8, and a second pushing rod 9. The first pushing rod 7 is slidably mounted on the gun body 1, with one end connected to a seal and the other end close to the moving plate 8. The first pushing rod 7 can push the moving plate 8 to move. One end of the second pushing rod 9 is connected to the moving plate 8, and the other end is connected to the locking part. After the sealing assembly 2 is pressed against the oil inlet and in place, the movement of the sealing assembly 2 is transmitted to the moving plate 8 through the first pushing rod 7, causing the moving plate 8 to move or swing. The moving plate 8 further drives the second pushing rod 9 to move, and the second pushing rod 9 drives the locking part to lock, thereby unlocking the locking mechanism 4.

[0026] Specifically, the pushing component also includes a pusher plate 10, which is annular and is disposed inside the sealing component 2. The pusher plate 10 is sleeved on the nozzle component.

[0027] In some embodiments, the locking part includes a guillotine 11 and a reset member 12. One end of the guillotine 11 is rotatably connected to the locking mechanism 4, and the other end is hinged to the pushing assembly. The guillotine 11 and the locking mechanism 4 are connected through the reset member 12. The reset member 12 has a tendency force to drive the guillotine 11 to lock the locking mechanism 4. This design can both push the guillotine 11 to move and passively reset it under the force of the reset member 12.

[0028] In some embodiments, the locking mechanism 4 includes a diaphragm assembly 13. When the sealing assembly 2 is in the first position, the cutter 11 is located on the stroke of the diaphragm assembly 13, preventing the diaphragm assembly 13 from descending, thereby locking the trigger assembly 5. At this time, lubrication cannot be performed. When the sealing assembly 2 is in the second position, the cutter 11 is located on one side of the stroke of the diaphragm assembly 13, allowing the diaphragm assembly 13 to descend, thereby unlocking the trigger assembly 5. At this time, lubrication can be performed.

[0029] In some embodiments, the movable disk 8 is C-shaped, and its two ends are hinged to the gun body 1. The movable disk 8 can swing under the push of the first push rod 7, thereby driving the second push rod 9 to move.

[0030] In some embodiments, one end of the trigger assembly 5 is connected to the bottom of the locking mechanism 4, the trigger assembly 5 abuts against the bottom of the valve stem of the valve body 3, and a hook assembly 14 is provided near the other end of the trigger assembly 5. The hook assembly 14 can hook the trigger assembly 5, and the trigger assembly 5 can be put into the activated state through the hook assembly 14 to achieve continuous refueling.

[0031] When the operator inserts the fuel nozzle into the vehicle's fuel filler neck, the nozzle assembly enters first. Then, the elastic portion at the front end of the sealing assembly 2 abuts against the edge of the fuel filler neck. As the nozzle penetrates further, the edge of the fuel filler neck exerts a backward thrust on the sealing assembly 2, forcing it to overcome its internal elasticity and retract axially along the nozzle assembly. When the sealing assembly 2 has been pushed backward a predetermined distance, it reaches a second position indicating that an effective seal has been formed. It should be noted that this predetermined distance is precisely designed, with a length sufficient to ensure that the sealing ring at the front end of the sealing assembly 2 forms a tight fit with the fuel filler neck, effectively isolating it from outside air.

[0032] As the sealing assembly 2 reaches the second position, its rear pusher 10 also moves backward by the same distance. The pusher 10 pushes the first push rod 7 backward, which in turn pushes the moving plate 8 to rotate around its pivot. The rotation of the moving plate 8 drives the second push rod 9 to move backward, and the end of the second push rod 9 then pushes the guillotine 11 to overcome the pulling force of the reset member 12, thereby causing the guillotine 11 to slide horizontally out of the movement path of the diaphragm assembly 13. At this time, the locking mechanism 4 moves to the unlocked position, and its physical obstruction to the diaphragm assembly 13 is released, making the movement path of the diaphragm assembly 13 unobstructed. Accordingly, in this state, the operator can normally drive the diaphragm assembly 13 downward by pulling the trigger assembly 5 to open the main valve for refueling.

[0033] After refueling is completed, when the operator pulls the refueling nozzle out of the vehicle's refueling port, the contact force between the front end of the sealing assembly 2 and the refueling port disappears, and the elasticity of the sealing assembly 2 itself immediately resets it, returning from the second position to the first position. As the sealing assembly 2 moves forward, the entire linkage mechanism (including the push plate 10, the first push rod 7, the moving plate 8, and the second push rod 9) also moves in the opposite direction to its initial state. After the pushing force on the locking mechanism 4 disappears, the locking mechanism 4, under the action of its own return spring, quickly slides back to the locked position, once again blocking the diaphragm assembly 13. At this point, the refueling nozzle is safely locked again, awaiting the next compliant operation.

[0034] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," and "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0035] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An ORVR (Oriented Refueling Machine) fuel nozzle with EVR (Electronic Vapor Recovery) function, characterized in that, The device includes a gun body, a sealing assembly, a valve body, a locking mechanism, a trigger assembly, and a linkage mechanism. The sealing assembly is retractably mounted on the nozzle assembly of the gun body and is used to form a seal with the vehicle's fuel filler neck. The valve body and the locking mechanism are both located within the gun body. The trigger assembly is connected to the locking mechanism and is used to drive the valve body to open. The locking mechanism is located on the gun body. One end of the linkage mechanism is connected to the sealing assembly, and the other end is connected to the locking mechanism. The linkage mechanism is used to transmit the movement of the sealing assembly to the locking mechanism. Specifically, when the sealing assembly is in a first position representing that no effective seal has been formed with the vehicle's fuel filler neck, the locking mechanism is in a locked position to prevent the valve body from opening. When the sealing assembly is pushed by the vehicle's fuel filler neck to a second position representing that an effective seal has been formed, the linkage mechanism drives the locking mechanism to move to an unlocked position to allow the valve body to open.

2. The ORVR (Oriented Refueling Machine) fuel nozzle with EVR function according to claim 1, characterized in that, The linkage mechanism includes a pushing component and a locking part. One end of the pushing component is connected to the sealing component, and the other end is connected to the locking part. The locking part is disposed on one side of the locking mechanism. When the sealing component is in the first position, the locking part locks the locking mechanism. When the sealing component is in the second position, the locking part unlocks the locking mechanism.

3. The ORVR fuel refueling nozzle with EVR function according to claim 2, characterized in that, The pushing assembly includes a first pushing rod, a movable plate, and a second pushing rod. The first pushing rod is slidably mounted on the gun body. One end of the first pushing rod is connected to the sealing assembly, and the other end is close to the movable plate. The first pushing rod can push the movable plate to move. One end of the second pushing rod is connected to the movable plate, and the other end is connected to the locking part.

4. The ORVR fuel refueling nozzle with EVR function according to claim 3, characterized in that, The pushing assembly further includes a pusher plate, which is annular and disposed within the sealing assembly.

5. The ORVR (Oriented Refueling Machine) fuel nozzle with EVR function according to any one of claims 2 to 4, characterized in that, The locking part includes a guillotine and a reset member. One end of the guillotine is rotatably connected to the locking mechanism, and the other end is hinged to the pushing assembly. The guillotine and the locking mechanism are connected through the reset member, which has a tendency force to drive the guillotine to lock the locking mechanism.

6. The ORVR fuel refueling nozzle with EVR function according to claim 5, characterized in that, The locking mechanism includes a diaphragm assembly. When the sealing assembly is in the first position, the cutter is located on the stroke of the diaphragm assembly, and the cutter prevents the diaphragm assembly from descending. When the sealing assembly is in the second position, the cutter is located on one side of the stroke of the diaphragm assembly, and the diaphragm assembly can descend.

7. The ORVR (Oriented Refueling Machine) fuel nozzle with EVR function according to claim 3, characterized in that, The moving disc is C-shaped, and its two ends are hinged to the gun body.

8. The ORVR (Oriented Refueling Machine) fuel nozzle with EVR function according to claim 1, characterized in that, One end of the trigger assembly is connected to the bottom of the locking mechanism, and the trigger assembly abuts against the bottom of the valve stem of the valve body. A hook assembly is provided near the other end of the trigger assembly, which can hook the trigger assembly.

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