CN118183607A - Oil gun and oil gun gas collecting hood - Google Patents

Abstract

The application relates to a fuel nozzle and a fuel nozzle gas-collecting hood, wherein the fuel nozzle gas-collecting hood comprises: a housing including a first opening for connection to a fuel dispenser and a second opening for connection to a vehicle fuel tank port, the housing having a peripheral dimension that gradually increases from the first opening to the second opening; and an oil and gas recovery switch valve arranged in the shell and close to the first opening, and used for controlling and allowing or preventing the oil and gas channel of the oiling gun to recover oil and gas. The gas collecting hood integrates the oil gas recovery switch valve, so that the oil gun is compatible with oiling different vehicles, the cost is lowest, and the oil gun and the oil gas recovery system are minimally changed.

Description

Oil gun and oil gun gas collecting hood

Technical Field

The invention relates to the field of oiling equipment, in particular to an oiling gun and an oiling gun gas collecting hood.

Background

For a long time, the oil vapors generated during the refueling of the vehicle may be emitted into the air in or near the fuel station. However, most of gasoline, diesel oil and other oil products of the gas station are volatile and have certain toxicity, and the ignition point is low, so that the gasoline, diesel oil and other oil products are easy to ignite, and potential safety hazards exist. Along with the increasing environmental protection requirements, the requirements on the problems of environmental protection, safety and the like of the gas station are also higher and higher. In order to reduce the oil vapor in and around the gas station as much as possible, the oil vapor recovery technology is popularized, and the oil gun with the oil vapor recovery function is used in a large amount to meet the requirement of environmental protection.

Along with further development of vehicle technology, ORVR (Onboard Refueling Vapor Recovery) on-board refueling vapor recovery systems have been developed and utilized, which are vehicle emission control systems that collect vapor (i.e., "vapor") from the fuel tank during refueling. When the automobile is refueled, the oil vapor in the oil tank can be absorbed by a carbon tank with an adsorption effect, so that the oil vapor is not scattered into the air of the gas station, and the oil vapor is not required to be recovered by the oil gun. However, only some of the vehicles currently have ORVR, which makes it difficult for the current fuel dispenser to be compatible with fueling two different vehicles when the two different vehicles are fueling.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention provides a gas collecting hood of a fuel gun, which comprises the following components: a housing including a first opening for connection to a fuel dispenser and a second opening for connection to a vehicle fuel tank port, the housing having a peripheral dimension that gradually increases from the first opening to the second opening; and an oil and gas recovery switch valve arranged in the shell and close to the first opening, and used for controlling and allowing or preventing the oil and gas channel of the oiling gun to recover oil and gas.

The fuel nozzle gas collection cover as described above, further comprising: the sealing piece is arranged at the second opening of the shell and fixedly connected with the shell, and is used for sealing a vehicle oil filling port when a vehicle is filled with oil, and the sealing piece comprises an opening for accommodating the oil pipe of the oil gun to pass through and/or the oil vapor to pass through.

The gas collecting hood of the oiling gun is characterized in that one side, close to the oil tank opening of the vehicle, of the sealing piece is an arc-shaped curved surface.

As described above, the fuel nozzle gas collecting channel, the oil gas recovery switching valve includes: the valve seat, case and connecting sleeve, wherein, connecting sleeve's first end links to each other with the valve seat, and the second end links to each other with the first opening of shell, the case setting is in the connecting sleeve to move between first position and second position.

The fuel nozzle gas-collecting channel as described above, the valve seat includes one or more through holes for receiving the passage of the fuel vapor into the connecting sleeve, the fuel vapor being accessible through the valve seat into the connecting sleeve when the valve element is in the first position, and the fuel vapor being inaccessible through the valve seat into the connecting sleeve when the valve element is in the second position.

As described above, the fuel nozzle gas collecting channel, the oil gas recovery switch valve further includes: and one end of the one or more guide posts is connected to the through hole, the other end of the one or more guide posts is propped against the valve core, and the guide posts can move in the through hole along with the valve core.

As described above, the fuel nozzle gas-collecting channel, the valve core includes: one or more grooves for receiving at least a portion of the guide posts.

As described above, the fuel nozzle gas collecting channel, the oil gas recovery switch valve further includes: and the resetting device is sleeved on the guide post and propped against the valve seat, and is used for recovering the valve core from the second position to the first position.

The fuel nozzle gas collection cover as described above, further comprising: one or more vent holes penetrating the housing and the connecting sleeve for balancing the air pressure on both sides of the valve core.

According to another aspect of the present application, there is provided a fuel dispenser comprising: the gas collecting hood of the oiling gun is sleeved on the gun barrel of the oiling gun and is connected with the gas pipe of the oiling gun.

The gas collecting hood integrates the oil gas recovery switch valve, so that the oil gun is compatible with oiling different vehicles, the cost is lowest, and the oil gun and the oil gas recovery system are minimally changed.

Drawings

Preferred embodiments of the present invention will be described in further detail below with reference to the attached drawing figures, wherein:

FIG. 1 is a schematic illustration of a fuel dispenser according to one embodiment of the application;

FIG. 2 is a cross-sectional view of a fuel dispenser according to one embodiment of the application;

FIG. 3 is a schematic view of a gas hood according to one embodiment of the application;

FIG. 4 is an exploded view of a gas hood according to one embodiment of the present application; and

Fig. 5A and 5B are cross-sectional views of a gas collection hood according to an embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the following detailed description, reference is made to the accompanying drawings, which form a part hereof, and in which is shown by way of illustration specific embodiments of the application. In the drawings, like reference numerals describe substantially similar components throughout the different views. Various specific embodiments of the application are described in sufficient detail below to enable those skilled in the art to practice the teachings of the application. It is to be understood that other embodiments may be utilized or structural, logical, or electrical changes may be made to embodiments of the present application.

At present, in order to meet the requirements specified by the pollutant emission limit value and the measurement method of GB18352.6-2016 light automobiles, the oiling gun of the gas station generally has an oil gas recovery function, and is used for recovering oil vapor generated in the oiling process of the automobile. However, with the update of vehicle technology, some vehicles currently have ORVR, so that the vehicles cannot overflow oil vapor in the refueling process, and the recovery of the oil vapor is not required in the refueling process of the vehicle refueling gun. This results in two completely different fueling situations, which are not compatible with current fueling guns or fueling station fuel recovery systems.

Also as ORVR vehicles increase, more and more regional landmarks require gas stations to install oil and gas recovery systems compatible with ORVR vehicles. That is, it is specifically an oil and gas recovery system with adaptive ORVR vehicle features. Still further, there is a need for an ORVR vehicle compatible vapor-to-liquid ratio range for vapor recovery when refueling an ORVR vehicle for a vapor recovery system: 0-0.5.

The application provides a gas collecting hood of a fuel gun, wherein an oil gas recovery switch valve is integrated in the gas collecting hood and can control an oil gas channel of the fuel gun, and when a traditional vehicle is filled with fuel, the oil gas recovery switch valve controls the oil gas channel to be communicated, so as to recover oil vapor generated by filling the fuel; when the ORVR vehicle is refueled, the oil gas channel is blocked by the oil gas recovery switch valve, oil gas vapor is not recovered, the oil gas recovery gas-liquid ratio is reduced to the range of the regulation requirement, and therefore the vehicle refueled system can be compatible with refueled conditions of different vehicles.

The technical scheme of the invention is further described by the following specific examples. Those skilled in the art will appreciate that there are still other alternatives capable of achieving the same or similar functionality that are taught by the following embodiments. Such alternatives are also within the scope of the present invention.

FIG. 1 is a schematic illustration of a fuel dispenser according to one embodiment of the application. FIG. 2 is a cross-sectional view of a fuel dispenser according to one embodiment of the application.

As shown, the fuel dispenser 100 includes a gun body 110 that includes an oil inlet 101 and an oil outlet 102. The oil inlet 101 can be connected with a rubber tube through an inlet thread, so that an oil gun can be connected to the oiling machine. Oil of the oiling machine enters the gun body from the oil inlet, and then the oil outlet flows out of the gun body. According to one embodiment of the application, the gun body 110 may be cast. According to one embodiment of the present application, the gun body 110 is made of metal or alloy such as aluminum, stainless steel, etc.

As shown, the fuel dispenser 100 further includes a valve assembly 120 disposed from the fuel inlet to the fuel outlet of the gun body 110, a drive mechanism 130, a vacuum cap 140, and a barrel assembly 150. The valve assembly 120 is used to allow or prevent oil from passing through the gun body 110 and to allow or block oil vapor from being recovered and then passing through the gun body 110. The driving mechanism 130 is connected with the valve assembly 120, and controls the on-off of the valve assembly 120, so as to control the oil and/or oil vapor to pass through. The vacuum cap 140 is used to lock the drive mechanism 130. When the drive mechanism 130 is in the locked state, the drive mechanism 130 is in the usable state as a whole. When the drive mechanism 130 is in the unlocked state, the drive mechanism 130 is not available and the opening and closing of the valve assembly 120 cannot be controlled. The barrel assembly 150 is provided at the front of the gun body 110, and may be inserted into a fuel tank of a vehicle to charge oil therein. In some embodiments, the barrel assembly includes an oil tube that may be used to contain oil therethrough and an air tube that is at least partially sleeved outside of the oil tube, and a gap between the air tube and the oil tube may be used to contain oil therethrough and into the gun body 110.

In some embodiments, gun body 110 further includes a plurality of chambers for receiving the various components of the fuel dispenser described above, including, but not limited to: a valve assembly cavity for receiving the valve assembly 120, a drive mechanism cavity for receiving the drive mechanism 130, a vacuum cap cavity for receiving the vacuum cap 140, and a barrel assembly cavity for receiving at least a portion of the barrel assembly 150.

In some embodiments, the gun body 110 may also include a liquid passage 104 and a gas passage 105 between the valve assembly cavity and the barrel assembly cavity; wherein the oil passage 104 defines a passage for oil to enter the vehicle oil tank through the gun body 110; the gas passage 105 defines a path for oil vapor to be recovered into the fuel dispenser through the gun body 110.

In some embodiments, the gun body 110 may also include an oil pressure passage 106 between the valve assembly cavity and the vacuum cap cavity and an air pressure passage 107 between the vacuum cap cavity and the barrel assembly cavity. Oil enters the vacuum cap 140 through the oil pressure channel 106, and the oil pressure provided by the oil can push the vacuum cap 140 to lock the driving mechanism 130, so that the driving mechanism is in a usable state. One end of the air pressure channel 107 is connected with the vacuum cap cavity, and the other end is connected with the Venturi valve. When the venturi valve draws air from the vacuum cap 140 through the air pressure channel 107, the vacuum cap may be disengaged from the drive mechanism 130, causing it to enter a non-useable state.

In some embodiments, the fuel dispenser 100 further includes a trigger 160 located outside of the gun body 110, coupled to the drive mechanism 130 via a switch, which may be used to control the drive mechanism. In some embodiments, the switch may be located on the outside of the gun body with one end connected to the trigger 160. One or both sides of the gun body 110 include an opening, and the other end of the switching member is connected to the driving mechanism 130 through the opening. In the locked state, when the trigger 160 is pulled, the driving mechanism 130 may be pushed via the switching member, thereby controlling the valve assembly 120.

In some embodiments, the fuel dispenser may further include a protective bow 164 disposed on the outside of the trigger 160 and removably coupled to the gun body 110 for protecting the hands during dispensing fuel. In some embodiments, the guard 164 includes one or more pins 165 thereon for engaging the trigger 160 to facilitate operator securement of the trigger 160 during fueling. Correspondingly, the trigger 160 also includes a snap-in structure disposed on the tail of the trigger 160 that can be pushed to be inserted into the respective pins of the bow guard 164 to provide different oil flow rates.

In some embodiments, the fuel nozzle 100 may further include a gas-collecting cover 180 disposed on the barrel assembly 150, and specifically sleeved outside the gas pipe, so that when the fuel nozzle can be used for fueling a vehicle, the fuel nozzle of the vehicle is closed, and fuel gas can enter the gap between the fuel pipe and the gas pipe through the gas-collecting cover, and then enter the fuel gas channel of the nozzle body, so that fuel gas can be prevented from leaking outside the fuel station. In some embodiments, the gas cap 180 may be integrated with a hydrocarbon recovery on-off valve that may control hydrocarbon ingress into the gap between the tubing and the trachea.

The structure of the gas collecting hood of the fuel dispenser of the present application will be described in detail.

Fig. 3 is a schematic view of a gas-collecting hood according to an embodiment of the application. Fig. 4 is an exploded view of a gas hood according to an embodiment of the present application. Fig. 5A and 5B are cross-sectional views of a gas collection hood according to an embodiment of the present application. Fig. 5A and 5B show two different operating states of the gas hood, respectively.

As shown, the fuel nozzle gas cap (may be referred to as a "gas cap") 300 may include: a housing 310 and an oil and gas recovery switch valve 320. Wherein a vapor recovery switch valve 320 is disposed in the housing 310 and can be used to control the passage of vapor into the fuel nozzle through the vapor collection hood.

In some embodiments, the housing 310 is shaped like a cone, which includes a first opening 311 and a second opening 312, and the outer peripheral dimension of the housing 310 gradually increases from the first opening 311 to the second opening 312. Wherein, first opening 311 can be used for linking to each other with the nozzle, and it can be directly overlapped on the trachea of barrel subassembly, and second opening 312 is used for linking to each other with the oil tank mouth of vehicle, can cover the oil tank mouth of vehicle. In some embodiments, one or more corrugations 313 may also be included on housing 310. It is located between first opening 311 and second opening 312, can make the gas-collecting channel be suitable for the vehicle tank opening of different models, and during refueling, the shell of gas-collecting channel can compress on the tank opening of vehicle. In some embodiments, the direction of wave propagation is perpendicular to the axial direction of the shell (or the gun barrel assembly), which is beneficial to the retraction deformation of the shell which is axially pressed in the oiling process, is beneficial to the demolding action of the production process in the production process of the gas collecting hood, and reduces the production cost of the gas collecting hood. In some embodiments, the housing may be a rubber material, polyurethane or nitrile rubber or fluororubber material to facilitate compression retraction of the housing when the vehicle is refueled.

In some embodiments, the gas collection cover 300 may further include a sealing piece 330, which may be disposed at the second opening 312 of the housing, and may be pressed against and fit with the tank opening of the vehicle when the vehicle is refueled, so that the tank opening of the vehicle may be sealed to prevent the oil gas from leaking out of the gas station. In some embodiments, the sealing piece can be made of rubber, polyurethane or nitrile rubber or fluororubber, which is beneficial to sealing the oil tank opening when the vehicle is refueled.

In some embodiments, the sealing plate 330 includes an aperture 331 located near the center of the sealing plate that may be used to receive a tubing of a barrel assembly therethrough, the sealing plate being threaded onto the tubing in fixed connection with the second opening 312 of the housing. In some embodiments, the size of the opening 331 is slightly larger than the size of the oil line, facilitating entry of oil and gas in the vehicle tank into the gas collection cover. In some embodiments, the sealing panel and the housing may be connected using an adhesive process. Of course, as those skilled in the art will appreciate, other connection methods can be applied to the technical solution of the present application. For example by a snap connection or the like. In some embodiments, the side of the sealing piece, which is close to the oil tank opening of the vehicle, is an approximately spherical arc-shaped curved surface, so that the sealing piece is beneficial to effectively sealing the oil tank openings of different vehicles.

In some embodiments, a vapor recovery switch valve 320 is provided on the housing proximate the first opening 311, i.e., where the housing is connected to the barrel assembly, and may be used to control the ability to permit or prevent recovery of vapor from the fuel nozzle vapor passage. In some embodiments, the oil and gas recovery switch valve 320 includes: the valve seat 321, the valve core 322 and the connecting sleeve 323, wherein the valve seat 321 is arranged in the connecting sleeve and is connected with the first end of the connecting sleeve 323, the valve core 322 is arranged in the connecting sleeve 323 and moves between a first position and a second position, and the second end of the connecting sleeve 323 is connected with the first opening of the shell and the air pipe.

In some embodiments, the valve seat is annular and includes one or more through holes 3211 that may be used to accommodate passage of oil vapor into the connection sleeve so that oil may enter the oil passage of the fuel dispenser. In some embodiments, the valve seat may be coupled to the first end of the coupling sleeve by an interference fit. As will be appreciated by those skilled in the art, other connection means in the art are equally applicable to the technical solution of the present application. For example: threaded connections, etc.

In some embodiments, the spool 322 is cylindrical and includes an end face 3221 at a first end that is substantially the same shape and size as the valve seat and may be used to block a through bore of the valve seat. Referring to fig. 5A and 5B, when the spool is in the first position, end face 3221 is away from the valve seat through which oil vapor may enter the connecting sleeve; when the spool is in the second position, end face 3221 is adjacent the valve seat and oil vapor cannot enter the connecting sleeve through the valve seat. In some embodiments, the second end of the valve spool includes a land 3222 that can bear against the end face of the air conduit, which can define the position of the valve spool, when the valve spool is in the first position, the land of the second end can bear against the end face of the air conduit. In some embodiments, the outer side of the valve spool is in clearance fit with the coupling sleeve to facilitate axial sliding of the valve spool in the coupling sleeve.

In some embodiments, the connection sleeve 323 includes one or more connection holes 3231 thereon, which may be used to secure the on-off valve to the barrel via screws. In some embodiments, a connection hole 3231 extends through the housing or communicates with a connection hole on the housing so that the housing and the on-off valve can be secured to the barrel using the same screw. In some embodiments, one or more seal grooves 3232 are included on the inner wall of the connection sleeve 323, which may be used to mount a seal ring, which may seal the connection sleeve from the outside of the trachea, preventing oil and gas from escaping through the gap between the connection sleeve and the trachea. In some embodiments, the side wall of the connecting sleeve may further include one or more ventilation holes 3233, which may be used to communicate the on-off valve with the external atmosphere, so as to be beneficial to balance the air pressure in the on-off valve, when the valve core moves, the air pressure in the on-off valve may change, and the ventilation holes may be used to balance the air pressure difference on two sides of the valve core, so as to ensure that the valve core moves more freely. In some embodiments, the vent 3233 extends through the housing or communicates with a vent on the housing. In some embodiments, the vent 3233 may further include an adjusting structure (not shown) that can adjust the size of the vent opening, thereby adjusting the response sensitivity of the valve core under vacuum.

In some embodiments, the oil and gas recovery switch valve 320 further includes: one or more guide posts 324, one end of which is connected to the 3211 through hole of the valve seat and the other end of which abuts against the end face of the valve core 322, can move in the through hole along with the valve core, and can be used for guiding the valve core to move. In some embodiments, the spool 322 further comprises: one or more grooves 3223, which are provided on the first end of the spool, may be used to receive a portion of the guide post, which may be biased into the groove 3223, may define the position of the spool, and may prevent the spool from rotating during movement.

In some embodiments, the axial section of the guide post is T-shaped, and includes a first portion and a second portion, where the first portion and the second portion are vertically connected, the first portion may be connected to the through hole, and the second portion may be engaged with the reset device 325 of the oil gas recovery switch valve sleeved on the first portion. In some embodiments, the reset device may be a reset spring, which is sleeved on the guide post, one end of the reset spring is clamped with the first part of the guide post, and one end of the reset spring is clamped with the valve seat, so that the valve core can be used for recovering from the second position to the first position.

The gas collecting hood is arranged on the oil gun, and when the oil gun refuels to a non-ORVR vehicle type, volatile oil gas in the oil tank can normally pass through a gas return passage of the gas collecting hood, the oil gun and the rubber tube to be pumped by a vacuum pump to a subsurface storage tank. The static pressure is lost in the process of oil gas flowing through the oil gun, a certain degree of vacuum degree is formed, the partial vacuum degree is overcome by the elasticity of the reset spring, and the valve core is kept in an open state.

When the oil gun refuels to the motorcycle type that has ORVR device, oil tank mouth and barrel are in sealed state, and the oil gas in the oil tank can not be taken away by oil gas recovery system, simultaneously, because the gas collecting channel of oil gun and oil tank mouth cooperation are inseparable, oil gas recovery system will establish the vacuum in whole return air passageway, simultaneously, the air vent intercommunication external atmospheric atmosphere of gas collecting channel side forms pressure differential in the case both sides of ooff valve, leads to the case to the vacuum side motion, seals the case in the through-hole department of disk seat to close oil gas passageway, make oil gas recovery system's gas-liquid ratio reduce. When the oil filling is finished, the oil gun is taken down from the oil tank port, the oil gas recovery system stops running, the vacuum in the oil gas passage disappears, and the valve core returns to the original position under the action of the return spring.

The integrated switching valve of the gas collecting hood can be used for rapidly replacing the gas collecting hood of the oil gun with the same interface size to realize the function of adapting to the ORVR, so that the compatible cost is minimum, the modification to the oil gun and the oil gas recovery system is minimum, and the whole system does not need to add an additional switching valve or change the structure of the oil gun body.

The above embodiments are provided for illustrating the present invention and not for limiting the present invention, and various changes and modifications may be made by one skilled in the relevant art without departing from the scope of the present invention, therefore, all equivalent technical solutions shall fall within the scope of the present disclosure.

Claims (10)

1. A fuel nozzle gas cap comprising:

A housing including a first opening for connection to a fuel dispenser and a second opening for connection to a vehicle fuel tank port, the housing having a peripheral dimension that gradually increases from the first opening to the second opening; and

And the oil gas recovery switch valve is arranged in the shell and is close to the first opening and used for controlling the oil gun oil gas channel to allow or prevent oil gun oil gas channel from recovering oil liquid vapor.

2. The fuel nozzle gas cap of claim 1, further comprising: the sealing piece is arranged at the second opening of the shell and fixedly connected with the shell, and is used for sealing a vehicle oil filling port when a vehicle is filled with oil, and the sealing piece comprises an opening for accommodating the oil pipe of the oil gun to pass through and/or the oil vapor to pass through.

3. The fuel nozzle gas collection cover of claim 2, wherein the sealing piece has an arcuate curved surface on a side thereof adjacent to the vehicle fuel tank opening.

4. The fuel nozzle gas collection cover of claim 1, said oil and gas recovery switch valve comprising: the valve seat, case and connecting sleeve, wherein, connecting sleeve's first end links to each other with the valve seat, and the second end links to each other with the first opening of shell, the case setting is in the connecting sleeve to move between first position and second position.

5. The fuel nozzle collector of claim 4, said valve seat including one or more through holes for receiving oil vapor therethrough into said connector sleeve, oil vapor being able to pass through said valve seat into said connector sleeve when said valve spool is in a first position and oil vapor being unable to pass through said valve seat into said connector sleeve when said valve spool is in a second position.

6. The fuel nozzle gas collection cover of claim 5, said vapor recovery switch valve further comprising: and one end of the one or more guide posts is connected to the through hole, the other end of the one or more guide posts is propped against the valve core, and the guide posts can move in the through hole along with the valve core.

7. The fuel nozzle gas cap of claim 6, said valve cartridge comprising: one or more grooves for receiving at least a portion of the guide posts.

8. The fuel nozzle gas collection cover of claim 6, said vapor recovery switch valve further comprising: and the resetting device is sleeved on the guide post and propped against the valve seat, and is used for recovering the valve core from the second position to the first position.

9. The fuel nozzle gas cap of claim 4, further comprising: one or more vent holes penetrating the housing and the connecting sleeve for balancing the air pressure on both sides of the valve core.

10. A fuel dispenser comprising: a fuel nozzle gas cap as claimed in any one of claims 1 to 9, which is fitted over the barrel of the fuel nozzle and connected to the gas tube of the fuel nozzle.