Oil gun and oil gas recovery switch valve

Abstract

The utility model relates to an oil gun and an oil gas recovery switch valve, and the oil gas recovery switch valve comprises a valve body which is internally provided with an oil channel and an oil gas channel and penetrates from a first end of the valve body to a second end of the valve body; the valve element is arranged in the oil-gas channel and moves between a first position and a second position so as to control the on-off of the oil-gas channel; wherein the oil-gas channel comprises a first section and a second section which are sequentially arranged, when the valve element is located at the first position, the first section and the second section of the oil-gas channel are kept communicated, and when the valve element is located at the second position, the first section and the second section of the oil-gas channel are kept blocked. The oil gas recovery switch valve can be flexibly matched with different types of oil guns under the condition that the structure of the oil gun is not changed, and the oil gun can be compatible with the oil filling conditions of different vehicles.

Description

Technical Field

[0001] The utility model relates to the field of refueling guns, in particular to a refueling gun and an oil and gas recovery switch 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 a refueling gun to recover the oil vapor. However, currently only some vehicles are equipped with ORVR, which makes it difficult for the current refueling gun to be compatible with the two different vehicles when refueling. Utility Model Content

[0004] In view of the technical problems existing in the prior art, the utility model proposes an oil and gas recovery switching valve, comprising: a valve body, which includes an oil channel and an oil and gas channel inside, and extends from the first end of the valve body to the second end of the valve body; and a valve core, which is arranged in the oil and gas channel and moves between a first position and a second position to control the on-off of the oil and gas channel; wherein the oil and gas channel includes a first section and a second section arranged in sequence, when the valve core is located at the first position, the first section and the second section of the oil and gas channel remain connected, and when the valve core is located at the second position, the first section and the second section of the oil and gas channel remain blocked.

[0005] As described above, the oil and gas recovery switch valve, the valve body comprises: a bottom shell and a cover plate, the cover plate is openably covered 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.

[0006] As described above, the oil and gas recovery switch valve, the valve core includes: a valve core body, a diaphragm and a valve seat, the diaphragm is arranged in the cavity and separates the cavity, the valve seat connects the valve core body and the diaphragm, and the diaphragm drives the valve core body to move in the cavity.

[0007] As described above, the oil and gas recovery switch valve, the valve core body includes a flat plate, the center of the first surface of which includes a protruding stud for connecting to the diaphragm, when the valve core is located in the second position, the flat plate covers the first section of the oil and gas channel or the second section of the oil and gas channel.

[0008] As described above, the oil and gas recovery switch valve, the first section and / or the second section of the oil and gas channel includes: a first part and a second part connected to each other, wherein the first part is parallel to the oil channel, the second part is perpendicular to the oil channel, and the second part extends into the cavity.

[0009] As described above, the oil and gas recovery switch valve, the second surface of the valve core body includes: a conical or cylindrical protrusion or a plurality of guide strips, when the flat plate covers the first section of the oil and gas channel or the second section of the oil and gas channel, the protrusion or the guide strip extends into the second part.

[0010] In the oil and gas recovery switch valve as described above, the diaphragm includes one or more corrugations, which are arranged around the valve core body to reserve a movement margin for the valve core body.

[0011] In the oil and gas recovery switch valve as described above, the cover plate includes: one or more air holes, which are used to balance the air pressure in the cavity.

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

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

[0014] The oil and gas recovery switch valve of the present application has a compact structure. After being installed on the refueling gun, the axial length of the refueling gun increases slightly, which will not affect the refueling operation. It can also be flexibly adapted to different types of refueling guns without changing the structure of the refueling gun, and realize the function of closing the oil and gas recovery passage when adapting to ORVR vehicles, and can take into account the oil and gas recovery during the refueling process of non-ORVR vehicles. 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 1A 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 switch valve according to an embodiment of the present application;

[0018] Figure 3A and Figure 3B A cross-sectional view of an oil and gas recovery switch valve according to an embodiment of the present application;

[0019] Figure 4 A schematic diagram of an oil and gas recovery switch valve according to another embodiment of the present application; and

[0020] Figure 5 Schematic diagram of an oil and gas recovery switch valve according to another embodiment of the present application. DETAILED DESCRIPTION

[0021] 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.

[0022] 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.

[0023] 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.

[0024] Moreover, with the increase in ORVR vehicles, more and more regional landmarks require gas stations to install oil vapor recovery systems that are compatible with ORVR vehicles. In other words, it is clearly required that the oil vapor recovery system that is compatible with ORVR vehicles has the gas-to-liquid ratio range of 0-0.5 when refueling ORVR vehicles.

[0025] The present application proposes an oil and gas recovery switch valve, which is installed on a refueling gun and can control the oil and gas channel. When refueling a traditional vehicle, the oil and gas recovery switch valve controls the oil and gas channel to be connected, and the oil vapor generated by refueling is recovered; when refueling an ORVR vehicle, the oil and gas recovery switch valve controls the oil and gas channel to be blocked, and the oil vapor is not recovered, thereby reducing the oil and gas recovery gas-liquid ratio to within the regulatory requirements, thereby being compatible with the refueling conditions of different vehicles.

[0026] 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.

[0027] Figure 1 It is a schematic diagram of a refueling gun according to an embodiment of the present application.

[0028] As shown in the figure, the refueling gun 100 includes a refueling gun body 110 and an oil and gas recovery switch valve (hereinafter referred to as "switch valve") 120. Among them, the switch 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 the on and off of the oil and gas channel. In some embodiments, the switch 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.

[0029] The structure of the oil and gas recovery switch valve of the present application will be described in detail below.

[0030] Figure 2 Schematic diagram of an oil and gas recovery switch 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 switch valve according to one embodiment of the present application. Figure 3A and Figure 3B Two different states of the oil and gas recovery switch valve are shown respectively.

[0031] As shown in the figure, the oil and gas recovery switch valve 200 includes: a valve body 210 and a valve core 220. The valve body 210 includes an oil channel 211 and an oil and gas channel, and runs 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; the valve core 220 is set in the oil and gas channel, and moves between an open position and a closed position, so as to control the on and off of the oil and gas channel 211.

[0032] refer to Figure 3A and Figure 3B The oil and gas passage includes a first section 212 and a second section 213 which are arranged in sequence. When the valve core is in an open position, the first section and the second section of the oil and gas passage remain connected, 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 a closed position, the first section and the second section of the oil and gas passage remain blocked, which can meet the requirements of fueling a vehicle with ORVR, and the fuel gun does not recover oil vapor, so that the fuel gun can be compatible with the fueling of different vehicles.

[0033] In some embodiments, the first section and the second section of the oil and gas channel are mirror images arranged in the valve body 210, and the structure of the oil and gas channel is further explained by taking the first section of the oil and gas channel as an example. It includes: a first part 2121 and a second part 2122 connected to each other, wherein the first part 2121 is parallel to the oil channel 211, and the second part 2122 is perpendicular to the oil channel. In some embodiments, the first part 2121 can be arranged in the middle of the valve body, and the oil channel is arranged on the outside. The cross-sectional shape of the oil channel is a crescent shape, which can wrap at least part of the first part. In some embodiments, the end surface of the second part away from the first part is processed flat, which can be used to seal with the valve core when the switch valve is closed.

[0034] 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 first section 213 and the second section 214 of the oil and gas channel, 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 second part of the first section and the second section of the oil and gas channel extends into the cavity 216. In some embodiments, the bottom shell 214 is roughly cylindrical, so that the switch valve is connected 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.

[0035] 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 switch 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.

[0036] In some embodiments, the valve core 220 includes: a valve core body 221, which is arranged in the cavity 216 and can close the first section or the second section of the oil and gas channel, so as to control the blocking of the oil and gas channel. In some embodiments, the valve core body 221 may include a flat plate 2211, and the center of the first surface thereof may include a protruding stud 2212. When the valve core is in the closed position, that is, when the oil and gas channel needs to be blocked, the flat plate 2211 covers the first section of the oil and gas channel or the second section of the oil and gas channel. In some embodiments, the second surface of the valve core body 221 may also include a plurality of guide strips 2213. When the flat plate 2211 covers the first section of the oil and gas channel or the second section of the oil and gas channel, the guide strips 2213 extend into the oil and gas channel, and can guide the valve core during the movement between the open position and the closed position, so as to avoid the position of the valve core from being offset during the movement, resulting in the on-off of the oil and gas channel being affected.

[0037] In some embodiments, the valve core 220 may further include a diaphragm 222 and a valve seat 223. The diaphragm 222 is disposed in the cavity 216 and separates the cavity 216, and the valve seat 223 connects the valve core body 221 with the diaphragm 222. In some embodiments, the diaphragm 222 may include an opening, which can accommodate the protruding stud 2212 on the valve core body 221 to pass through, and the two are connected together by the valve seat 223. In some embodiments, the valve seat 223 may be a nut, and the diaphragm can be clamped by tightening the nut on the protruding stud. In some embodiments, a gasket may be further disposed between the diaphragm 222 and the valve seat 223, which can protect the diaphragm and prevent the diaphragm from being damaged during the tightening of the nut, and can also increase the area of ​​the clamped diaphragm to improve the stability of the structure.

[0038] In some embodiments, the shape of the diaphragm 222 can be similar to that of the cover plate 215, and the diaphragm 222 can be clamped between the bottom shell 214 and the cover plate 215, and the diaphragm can be fixed in the cavity 216 through the openable cover plate 215, so that the valve core body can be fixed in the cavity 216. In some embodiments, the structure of the diaphragm can be a rubber layer and a fiber reinforced layer. When the diaphragm adopts a single-sided rubber structure, the rubber layer is installed close to the valve core body, so that the valve core body can move up and down in the cavity, and the oil and gas channel can be controlled. In some embodiments, the diaphragm structure can also be a double-sided rubber structure, that is, the middle is a fiber reinforced layer and the two sides are rubber layers.

[0039] In some embodiments, the diaphragm 222 may also include one or more corrugations, which are arranged in a shape similar to that of the diaphragm, or may be arranged around the valve core body, reserving a certain amount of movement margin in advance, so that the diaphragm can drive the valve core body to move up and down more freely, and avoid the diaphragm hardness changes under certain working conditions (such as low temperature) causing the valve core body movement to be affected, thereby affecting the normal use of the switch valve.

[0040] In some embodiments, the valve core 220 may further include a reset device 224, which is sleeved on the outside of the second part of the oil and gas channel and abuts against the second surface of the valve core body 221, and can support the valve core body and reset the valve core body. In some embodiments, the reset device 224 may be a reset spring, which is sleeved on the outside of the second part and abuts against the second surface of the valve core body. When the valve core is in the closed position, the reset spring is compressed and elastically deformed, which can provide power for the valve core to move from the closed position to the open position.

[0041] In some embodiments, the cover plate 215 includes: one or more air holes 2151, which are used to balance the air pressure in the cavity 216. When the diaphragm drives the valve core body to move up and down, the air pressure on both sides of the cavity separated by the diaphragm will change. The air holes can be used to balance the air pressure difference on both sides of the cavity, thereby ensuring that the diaphragm drives the valve core body to move up and down more freely.

[0042] The oil and gas passage of the present application is controlled by the valve core. During operation, when the refueling vehicle is not equipped with ORVR, oil vapor is recovered in the oil and gas passage, there is no vacuum in the oil and gas passage, the valve core is in an open position, and the oil and gas passage remains connected; when the refueling vehicle is equipped with ORVR, no oil vapor is recovered in the oil and gas passage, a vacuum is generated in the oil and gas passage, and the vacuum acts on the diaphragm of the valve core, which will drive the valve core body to approach the oil and gas passage, the oil and gas passage is blocked, and the return spring is compressed. When refueling is completed, the vacuum in the oil and gas passage disappears, and the valve core body will return to its original position under the action of the return spring.

[0043] This application also proposes other structures of oil and gas recovery switch valves. The details are as follows:

[0044] Figure 4 Schematic diagram of an oil and gas recovery switch valve according to another embodiment of the present application.

[0045] As shown in the figure, the oil and gas recovery switch valve 400 and Figure 2 The difference between the oil and gas recovery switch valve in the embodiment lies in the structure of the valve core, and the other structures are the same as Figure 2 The embodiments are similar and will not be described again here.

[0046] The oil and gas passage includes a first section 412 and a second section 413 which are arranged in sequence. When the valve core is in an open position, the first section and the second section of the oil and gas passage remain connected, 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 a closed position, the first section and the second section of the oil and gas passage remain blocked, which can meet the requirements of fueling a vehicle with ORVR, and the fuel gun does not recover oil vapor, so that the fuel gun can be compatible with the situations of fueling different vehicles.

[0047] In some embodiments, the first section and the second section of the oil and gas channel are mirror images arranged in the valve body 410, and the structure of the oil and gas channel is further explained by taking the first section of the oil and gas channel as an example. It includes: a first part 4121 and a second part 4122 connected to each other, wherein the first part 4121 is parallel to the oil channel 411, and the second part 4122 is perpendicular to the oil channel. In some embodiments, the first part 4121 can be arranged in the middle of the valve body, and the oil channel is arranged on the outside. The cross-sectional shape of the oil channel is a crescent shape, which can wrap at least part of the first part. In some embodiments, the end surface of the second part away from the first part is processed flat, which can be used to seal with the valve core when the switch valve is closed.

[0048] In some embodiments, the oil and gas passage also includes a venting groove 414, which is connected between the first section and the first part of the second section of the oil and gas passage, and can connect the oil and gas passage, which is conducive to the switch valve in the closed state, and there is still a venting gap before and after the valve core. When refueling is completed, the vacuum acting on the valve core can be quickly destroyed, and the valve core returns to the initial open position, avoiding the existing valve core being sucked in the closed position for a long time by the residual vacuum in the oil and gas passage, affecting the gas-liquid ratio of the next refueling process. In some embodiments, the size of the venting groove is smaller than the size of the first part.

[0049] In some embodiments, the valve core 420 includes: a valve core body 421, which is arranged in the cavity 416 and can close the first section or the second section of the oil and gas channel, so as to control the blocking of the oil and gas channel. In some embodiments, the valve core body 421 may include a flat plate 4211, and the center of the first surface thereof may include a protruding stud 4212. When the valve core is in the closed position, that is, when the oil and gas channel needs to be blocked, the flat plate 4211 covers the first section of the oil and gas channel or the second section of the oil and gas channel. In some embodiments, the second surface of the valve core body 421 may also include a columnar protrusion 4213. When the valve core is in the closed position, the protrusion 4213 completely extends into the second part of the oil and gas channel, which can close the ventilation groove 414 and guide the valve core during the movement between the open position and the closed position to prevent the position of the valve core from being offset during the movement, resulting in the opening and closing of the oil and gas channel being affected.

[0050] The oil and gas passage of the present application is controlled by the valve core. During operation, when the refueling vehicle is not equipped with ORVR, oil vapor is recovered in the oil and gas passage, there is no vacuum in the oil and gas passage, the valve core is in an open position, and the oil and gas passage remains connected through the cavity and / or the ventilation groove; when the refueling vehicle is equipped with ORVR, no oil vapor is recovered in the oil and gas passage, a vacuum is generated in the oil and gas passage, and the vacuum acts on the diaphragm of the valve core, which will drive the valve core body to approach the oil and gas passage, the oil and gas passage is blocked, and the return spring is compressed. When refueling is completed, the vacuum in the oil and gas passage can disappear quickly, and the valve core body will return to the open position under the action of the return spring.

[0051] Figure 5 Schematic diagram of an oil and gas recovery switch valve according to another embodiment of the present application.

[0052] As shown in the figure, the oil and gas recovery switch valve 500 and Figure 2 The difference between the oil and gas recovery switch valve in the embodiment lies in the structure of the valve core, and the other structures are the same as Figure 2 The embodiments are similar and will not be described again here.

[0053] In some embodiments, the valve core 520 includes: a valve core body 521, which is disposed in the cavity 516 and can close the first section or the second section of the oil and gas channel, so as to control the blocking of the oil and gas channel. In some embodiments, the valve core body 521 may include a flat plate 5211, and the center of the first surface thereof may include a protruding stud 5212. When the valve core is in the closed position, that is, when the oil and gas channel needs to be blocked, the flat plate 5211 covers the first section of the oil and gas channel or the second section of the oil and gas channel. In some embodiments, the second surface of the valve core body 521 may also include a conical protrusion 5213, which can adjust the return air resistance of the switch valve, so as to adapt to different gas-liquid ratio range requirements.

[0054] The oil and gas recovery switch valve of the present application has a compact appearance. After being installed on the fuel gun, the axial length of the fuel gun increases slightly and will not affect the refueling operation. It can also be flexibly adapted to different types of fuel guns without changing the structure of the fuel gun, and realize the function of closing the oil and gas recovery passage when adapting to ORVR vehicles, and can take into account the oil and gas recovery during the refueling process of non-ORVR vehicles.

[0055] 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 switch valve, characterized in that: include: A valve body, which includes an oil channel and an oil-gas channel inside and runs from the first end of the valve body to the second end of the valve body; as well as A valve core is disposed in the oil and gas passage and moves between a first position and a second position so as to control the on-off of the oil and gas passage; Wherein, the oil and gas channel includes a first section and a second section arranged in sequence. When the valve core is located in the first position, the first section and the second section of the oil and gas channel remain connected. When the valve core is located in the second position, the first section and the second section of the oil and gas channel remain blocked.

2. The oil and gas recovery switch 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.

3. The oil and gas recovery switch valve according to claim 2, characterized in that: The valve core comprises: a valve core body, a diaphragm and a valve seat. The diaphragm is arranged in the cavity and divides the cavity. The valve seat connects the valve core body and the diaphragm. The diaphragm drives the valve core body to move in the cavity.

4. The oil and gas recovery switch valve according to claim 3, characterized in that: The valve core body includes a flat plate, the center of the first surface of which includes a protruding stud for connecting with the diaphragm. When the valve core is located at the second position, the flat plate covers the first section of the oil and gas channel or the second section of the oil and gas channel.

5. The oil and gas recovery switch valve according to claim 4, characterized in that: The first section and / or the second section of the oil and gas channel comprises: a first part and a second part connected to each other, wherein the first part is parallel to the oil channel, the second part is perpendicular to the oil channel, and the second part extends into the cavity.

6. The oil and gas recovery switch valve according to claim 5, characterized in that: The second surface of the valve core body includes: a conical or cylindrical protrusion or a plurality of guide strips, and when the flat plate covers the first section of the oil and gas channel or the second section of the oil and gas channel, the protrusion or the guide strip extends into the second part.

7. The oil and gas recovery switch valve according to claim 3, characterized in that: The diaphragm includes one or more corrugations which are arranged around the valve core body to reserve a movement margin for the valve core body.

8. The oil and gas recovery switch valve according to claim 2, characterized in that: The cover plate includes: one or more air holes, which are used to balance the air pressure in the cavity.

9. The oil and gas recovery switch 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 switch 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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