Oil gun and oil gas recovery balance valve

Abstract

The utility model relates to an oil gun and an oil gas recovery balance valve, the oil gas recovery balance valve comprises a valve body, an oil liquid channel, an oil gas channel and a gas supplementing channel are arranged in the valve body, the oil liquid channel and the oil gas channel penetrate from a first end of the valve body to a second end of the valve body, and the gas supplementing channel is communicated with the oil liquid channel. The gas supplementing channel is connected with the outer side of the valve body and the oil gas channel; the valve element is arranged between the oil gas channel and the gas supplementing channel and moves between a first position and a second position so as to control connection and disconnection between the oil gas channel and the gas supplementing channel; when the valve element is located at the first position, the oil and gas channel and the gas supplementing channel are kept communicated, and when the valve element is located at the second position, the oil and gas channel and the gas supplementing channel are kept blocked. According to the balance valve, oil gas recovery in the refueling process of different vehicles can be considered; and the service life of the oil gas recovery system is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of refueling equipment, in particular to a refueling gun and an oil and gas recovery balancing valve. Background Art

[0002] For a long time, the oil vapor generated during the refueling process of vehicles will be emitted into the air in or near the gas station. However, the gasoline or diesel oil at the gas station is volatile and toxic, and the ignition point is very low, which is easy to ignite and poses a safety hazard. With the increasing demand for environmental protection, the requirements for environmental protection and safety of gas stations are also getting higher and higher. In order to minimize the oil vapor in and around gas stations, oil and gas recovery technology has been popularized, and refueling guns with oil and gas recovery function are widely used to meet environmental protection requirements.

[0003] With the further development of vehicle technology, the ORVR (Onboard Refueling Vapor Recovery) on-board refueling oil vapor recovery system has been developed and applied. It is a vehicle emission control system that can collect the oil vapor (also known as "oil vapor") that evaporates from the fuel tank during the refueling process. When the car is refueling, the oil vapor in the fuel tank will be absorbed by a carbon canister with an adsorption effect, so that no oil vapor will be dispersed into the air of the gas station, and there is no need for the refueling gun to recover the oil vapor. Therefore, when refueling a vehicle equipped with ORVR, the refueling gun or the oil vapor recovery system is overloaded, which seriously affects the service life of the gas station oil vapor recovery system. Utility Model Content

[0004] In view of the technical problems existing in the prior art, the utility model proposes an oil and gas recovery balancing valve, comprising: a valve body, the interior of which includes an oil channel, an oil and gas channel and an air supply channel, the oil channel and the oil and gas channel extending from the first end of the valve body to the second end of the valve body, the air supply channel connecting the outer side of the valve body with the oil and gas channel; and a valve core, which is arranged between the oil and gas channel and the air supply channel, and moves between a first position and a second position to control the connection and disconnection between the oil and gas channel and the air supply channel; wherein, when the valve core is located at the first position, the oil and gas channel and the air supply channel remain connected, and when the valve core is located at the second position, the oil and gas channel and the air supply channel remain blocked.

[0005] As described above, the oil and gas recovery balancing valve, the valve body includes: a bottom shell and a cover plate, the cover plate can be opened and covered on the bottom shell, a cavity is enclosed between the bottom shell and the cover plate, and the cavity is connected with the oil and gas channel and the air supply channel.

[0006] In the oil and gas recovery balancing valve as described above, the oil and gas passage comprises a first section and a second section which are arranged in sequence, and the first section and the second section extend into the cavity.

[0007] In the oil and gas recovery balancing valve as described above, the air supply channel is one or more air holes, which are arranged on the cover plate and communicated with the cavity.

[0008] In the oil and gas recovery balancing valve as described above, the valve core includes: a flat plate, which is arranged in the cavity and moves in the cavity. When the valve core is located in the second position, the first surface of the flat plate covers the air supply channel. When the valve core is located in the first position, the first surface of the flat plate is away from the air supply channel.

[0009] In the oil and gas recovery balancing valve as described above, the valve core further includes a return spring, which is used for restoring the valve core from the first position to the second position.

[0010] In the oil and gas recovery balancing valve as described above, the second surface of the flat plate includes a boss which is engaged with the first end of the return spring.

[0011] In the oil and gas recovery balancing valve as described above, the second end of the return spring is sleeved on the first section and / or the second section of the oil and gas passage.

[0012] As described above, the oil and gas recovery balancing valve, the first end of the valve body and / or the second end of the valve body comprises connecting threads.

[0013] According to another aspect of the present application, a refueling gun is proposed, comprising: the oil and gas recovery balancing valve as described above, which is arranged at the oil inlet of the refueling gun.

[0014] The balancing valve of the present application is compact in appearance and does not affect the refueling operation; it can be flexibly adapted to different types of refueling guns and can take into account the oil and gas recovery during the refueling process of different vehicles; it is beneficial to increase the service life of the oil and gas recovery system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Below, the preferred embodiments of the present invention will be further described in detail with reference to the accompanying drawings, wherein:

[0016] Figure 1 A schematic diagram of a refueling gun according to an embodiment of the present application;

[0017] Figure 2 A schematic diagram of an oil and gas recovery balancing valve according to an embodiment of the present application; and

[0018] Figure 3A and Figure 3B It is a cross-sectional view of an oil and gas recovery balancing valve according to one embodiment of the present application;. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In the following detailed description, reference may be made to the various specification drawings that are part of the present application and are used to illustrate specific embodiments of the present application. In the accompanying drawings, similar reference numerals describe substantially similar components in different figures. The various specific embodiments of the present application are described below in sufficient detail so that a person of ordinary skill in the art with relevant knowledge and skills in the art can implement the technical solutions of the present application. It should be understood that other embodiments may also be used or structural, logical or electrical changes may be made to the embodiments of the present application.

[0021] At present, in order to meet the requirements of GB18352.6-2016 Light Vehicle Pollutant Emission Limits and Measurement Methods, the refueling guns at gas stations generally have an oil vapor recovery function to recover the oil vapor generated by the vehicle during the refueling process. However, some vehicles currently have ORVR, and the vehicle will not overflow with oil vapor during the refueling process. For such vehicles, the refueling gun does not need to recover the oil vapor during the refueling process. This leads to two completely different refueling situations, and the current refueling guns or gas station oil and gas recovery systems are not compatible with the above two situations.

[0022] And as the number of ORVR vehicles increases, more and more regional landmarks require gas stations to install oil vapor recovery systems that are compatible with ORVR vehicles. In other words, there is a clear need for oil vapor recovery systems that are adapted to the characteristics of ORVR vehicles.

[0023] The present application proposes an oil and gas recovery balancing valve, which can be installed on a refueling gun and can control the oil and gas passage. When refueling a traditional vehicle, the oil and gas recovery balancing valve controls the oil and gas passage to be connected and recovers the oil vapor generated by refueling; when refueling an ORVR vehicle, the oil and gas recovery balancing valve controls the outside gas to enter the oil and gas passage to avoid excessive load on the vacuum pump in the oil and gas recovery system and maintain a normal oil and gas recovery gas-liquid ratio, so that it can be compatible with the refueling conditions of different vehicles, so that the oil and gas recovery system can work normally when the refueling gun is refueling different vehicles.

[0024] The technical solution of the utility model is further described below by specific embodiments. Those skilled in the art should understand that, under the enlightenment of the following embodiments, there may still be other alternatives that can achieve the same or similar functions. These alternatives are also within the protection scope of the utility model.

[0025] Figure 1 It is a schematic diagram of a refueling gun according to an embodiment of the present application.

[0026] As shown in the figure, the refueling gun 100 includes a refueling gun body 110 and an oil and gas recovery balancing valve (hereinafter referred to as "balancing valve") 120. Among them, the balancing valve 120 is arranged at the oil inlet of the refueling gun body 110, and is respectively connected to the refueling gun body 110 and the fuel dispenser hose, and can be used to control whether to add external gas to the oil and gas channel. In some embodiments, the balancing valve 120 can also be arranged at other positions. For example, on a hose connected to the refueling gun body 110. In some embodiments, the refueling gun body 110 includes an oil channel and an oil and gas channel, which can be used to refuel the vehicle and recover oil vapor. The refueling gun body 110 can be any current refueling gun with an oil and gas recovery function, and thus the structure of the refueling gun body 110 will not be repeated here.

[0027] The structure of the oil and gas recovery balancing valve of the present application will be described in detail below.

[0028] Figure 2 Schematic diagram of an oil and gas recovery balancing valve according to an embodiment of the present application. Figure 3A and Figure 3B It is a cross-sectional view of an oil and gas recovery balancing valve according to one embodiment of the present application. Figure 3A and Figure 3B Two different states of the oil and gas recovery balancing valve are shown respectively.

[0029] As shown in the figure, the oil and gas recovery balance valve 200 includes: a valve body 210 and a valve core 220. The valve body 210 includes an oil channel 211, an oil and gas channel 212 and an air supply channel 213, wherein the oil channel 211 and the oil and gas channel 212 run from the first end of the valve body 210 to the second end of the valve body, that is, the oil channel 211 and the oil and gas channel run through the entire valve body, and can be connected to the oil channel and the oil and gas channel of the fuel gun body respectively, and the air supply channel 312 is connected to the oil and gas channel and the outside of the valve body, that is, the air supply channel can connect the external gas to the oil and gas channel; the valve core 220 is arranged in the valve body and moves between the open position and the closed position, so as to control the on-off between the air supply channel 213 and the oil and gas channel 211, so as to control whether to add gas to the oil and gas channel.

[0030] In some embodiments, the valve body 210 may include: a bottom shell 214 and a cover plate 215. The cover plate 215 is an openable cover on the bottom shell 214, and a cavity 216 is formed between the bottom shell 214 and the cover plate 215. The cavity 216 is connected to the oil and gas channel 212 and the air supply channel 213, and can be used to accommodate the valve core 220, and the valve core 220 can reciprocate in the cavity 216. In some embodiments, the bottom shell 214 is roughly cylindrical to facilitate the connection of the balance valve to the fuel gun body. In some embodiments, the cover plate 215 is square, which can be detachably arranged on the bottom shell by bolts and protrude outward from the bottom shell. In some embodiments, the cover plate 215 can also have other shapes. For example: round, etc.

[0031] In some embodiments, both ends of the bottom shell 214 (or the valve body 210) include connecting threads, which can be used to connect the balance valve to the fuel gun body and the hose. Specifically, one end of the bottom shell 214 includes an external thread, which can be used to connect to the fuel inlet of the fuel gun, and the other end of the bottom shell 214 includes an internal thread, which can be used to connect to the hose. As those skilled in the art understand, connecting by thread is only one connection method in the art, and other connection methods in the art can be applied to the technical solution of the present application.

[0032] refer to Figure 3A and Figure 3B , the oil and gas channel 212 includes a first section 2121 and a second section 2122 which are sequentially arranged, wherein the first section and the second section are mirror-imaged and arranged in the valve body 210 and extend into the cavity 216. In some embodiments, the air supply channel 213 also extends into the cavity, and the air supply channel and the oil and gas channel can be connected by the cavity. When the valve core is in the open position, the oil and gas channel 212 is not connected with the air supply channel, that is, the oil and gas channel and the air supply channel remain blocked, which can meet the requirements of fueling a vehicle without ORVR, and the fuel gun can recover oil vapor normally; when the valve core is in the closed position, the oil and gas channel is connected with the air supply channel, that is, the oil and gas channel and the air supply channel remain connected, which can meet the requirements of fueling a vehicle with ORVR, and the oil and gas recovery system works normally, recovers the supplemented external air, avoids excessive load on the vacuum pump, and can be compatible with the conditions of different vehicles.

[0033] In some embodiments, the valve core 220 includes: a flat plate 221, which is disposed in the cavity 216 and can move up and down in the cavity. When the valve core is in the open position, that is, when the connection between the oil and gas channel and the air supply channel needs to be blocked, the first surface of the flat plate 221 covers the air supply channel; when the valve core is in the closed position, that is, when the oil and gas channel and the air supply channel need to be connected, the first surface of the flat plate 221 is away from the air supply channel. In some embodiments, the flat plate is a metal plate, and a rubber structure is wrapped on at least the first surface thereof, so that the valve core can close the air supply channel to prevent the air supply channel from being connected to the oil and gas channel when in the open position.

[0034] In some embodiments, the valve core 220 may further include a reset device 222, which may be sleeved on the outside of the first section and / or the second section of the oil and gas channel and abut against the second surface of the flat plate 221, so as to support the valve core and reset the valve core. In some embodiments, the reset device 224 may be a reset spring. When the valve core is in the closed position, the reset spring is compressed and elastically deformed, which may provide power for the valve core to move from the closed position to the open position and return to the open position. In some embodiments, the second surface of the flat plate 221 may include a boss 2211, which may be used to engage with the reset device to prevent the reset device from shifting during the movement of the valve core, thereby causing the movement path of the valve core to change and failing to achieve the function of a balancing valve.

[0035] In some embodiments, the air supply channel 213 can be one or more air holes, which can be set on the cover plate, and are used to connect the cavity with the outside of the balancing valve. When refueling an ORVR vehicle, the refueling gun cannot inhale or recover oil vapor, and the oil and gas recovery system of the gas station continues to work. It needs to supplement gas from the outside to make the oil and gas recovery system work normally. The air holes can replenish outside air into the oil and gas channel; when refueling a non-ORVR vehicle, the refueling gun can normally inhale or recover oil vapor, and the oil and gas recovery system of the gas station can work normally. The air holes do not need to replenish outside air into the oil and gas channel, and the valve core needs to close the air holes. In some embodiments, the valve core needs to fit the inner wall of the cover plate to close the air holes. The inside of the cover plate needs to be processed flat, which is conducive to the closure of the air holes and prevents the outside air from entering when the oil vapor is recovered normally.

[0036] The balancing valve of the present application has a compact appearance, and the axial length of the oil gun added after installation is small. It is installed between the oil gun and the hose without affecting the refueling operation. It can be flexibly adapted to different types of refueling guns without changing the structure of the refueling gun, and realize the function of replenishing air in the oil and gas recovery passage when adapting to ORVR vehicles, while taking into account the oil and gas recovery during the refueling process of non-ORVR vehicles. The balanced type can also prevent the oil and gas recovery system from operating under high vacuum conditions, which is beneficial to protecting components such as vacuum pumps, motors, and proportional valves, and is beneficial to increasing the service life of the oil and gas recovery system.

[0037] The above embodiments are only used to illustrate the present invention, but not to limit the present invention. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the scope of the present invention. Therefore, all equivalent technical solutions should also fall within the scope of the present invention.

Claims

1. An oil and gas recovery balancing valve, characterized in that: include: A valve body, the interior of which includes an oil channel, an oil-gas channel and an air-supplement channel, wherein the oil channel and the oil-gas channel extend from the first end of the valve body to the second end of the valve body, and the air-supplement channel connects the outer side of the valve body with the oil-gas channel; as well as A valve core is disposed between the oil and gas passage and the air supplement passage, and moves between a first position and a second position so as to control the opening and closing of the oil and gas passage and the air supplement passage; Wherein, when the valve core is located at the first position, the oil and gas passage and the air supply passage remain connected, and when the valve core is located at the second position, the oil and gas passage and the air supply passage remain blocked.

2. The oil and gas recovery balancing valve according to claim 1, characterized in that: The valve body comprises: a bottom shell and a cover plate, wherein the cover plate is openably disposed on the bottom shell, a cavity is enclosed between the bottom shell and the cover plate, and the cavity is communicated with the oil and gas channel and the air supply channel.

3. The oil and gas recovery balancing valve according to claim 2 is characterized in that: The oil and gas passage comprises a first section and a second section which are arranged in sequence, and the first section and the second section extend into the cavity.

4. The oil and gas recovery balancing valve according to claim 2, characterized in that: The air supplement channel is one or more air holes, which are arranged on the cover plate and communicated with the cavity.

5. The oil and gas recovery balancing valve according to claim 2, characterized in that: The valve core includes: a flat plate, which is arranged in the cavity and moves in the cavity. When the valve core is located at the second position, the first surface of the flat plate covers the air supply channel. When the valve core is located at the first position, the first surface of the flat plate is away from the air supply channel.

6. The oil and gas recovery balancing valve according to claim 5, characterized in that: The valve core further includes a return spring, which is used for restoring the valve core from the first position to the second position.

7. The oil and gas recovery balancing valve according to claim 6, characterized in that: The second surface of the flat plate includes a boss which is engaged with the first end of the return spring.

8. The oil and gas recovery balancing valve according to claim 7, characterized in that: The second end of the return spring is sleeved on the first section and / or the second section of the oil and gas passage.

9. The oil and gas recovery balancing valve according to claim 1, characterized in that: The first end of the valve body and / or the second end of the valve body comprises a connecting thread.

10. A refueling gun, characterized in that: include: The oil and gas recovery balancing valve as described in any one of claims 1 to 9 is arranged at the oil inlet of the refueling gun.

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