Oil gun

Abstract

The utility model relates to an oil gun which comprises a gun body, the gun body comprises a body and a boss protruding towards the outer portion of the body, the gun body comprises a liquid channel allowing oil to pass through and an oil gas channel allowing oil gas to be recycled, and at least part of the oil gas channel is located in the boss; the valve element is arranged in the boss and moves between a first position and a second position so as to control on-off of an oil gas channel in the boss. Wherein the boss comprises a first section of oil-gas channel and a second section of oil-gas channel which are sequentially arranged, when the valve element is located at the first position, the first section of oil-gas channel and the second section of oil-gas channel are kept communicated, and when the valve element is located at the second position, the first section of oil-gas channel and the second section of oil-gas channel are kept blocked. According to the oil gun, the switch valve is integrated, so that different vehicles can be filled with oil.

Description

Technical Field

[0001] The utility model relates to the field of refueling equipment, in particular to a refueling gun. 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 results in the above-mentioned two different vehicles being refueled, and the current refueling gun is difficult to be compatible with the two different vehicles. Utility Model Content

[0004] In view of the technical problems existing in the prior art, the utility model proposes a refueling gun, comprising: a gun body, comprising a main body and a boss protruding outward from the main body, the gun body comprising a liquid channel for oil liquid to pass through, and an oil-gas channel for oil gas recovery, wherein at least part of the oil-gas channel is located in the boss; a valve assembly, which is arranged in a valve assembly cavity of the gun body and is configured to allow or prevent oil liquid from passing through the liquid channel and oil gas from passing through the oil-gas channel; a drive mechanism, which is arranged in a drive mechanism cavity of the gun body and is configured to control the opening or closing of the valve assembly; a barrel assembly, which is at least partially arranged in the barrel assembly cavity of the gun body, and the barrel assembly includes The invention comprises an oil pipe and an air pipe, wherein the oil pipe is configured to accommodate the passage of oil, and the air pipe is at least partially sleeved outside the oil pipe, and the gap between the air pipe and the oil pipe is configured to accommodate the passage of oil and gas; and a valve core, which is arranged in the boss and moves between a first position and a second position to control the on-off of the oil and gas channel located in the boss; wherein the boss includes a first section of the oil and gas channel and a second section of the oil and gas channel arranged in sequence, and when the valve core is located at the first position, the first section of the oil and gas channel 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 of the oil and gas channel and the second section of the oil and gas channel remain blocked.

[0005] In the refueling gun as described above, the interior of the boss includes a cavity, the cavity is communicated with the first section of the oil and gas passage and the second section of the oil and gas passage, and is used to accommodate the valve core.

[0006] In the fuel gun as described above, the boss includes an openable cover plate, and the cover plate can open or close the cavity.

[0007] In the refueling gun as described above, 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 with the diaphragm. The diaphragm drives the valve core body to move in the cavity.

[0008] As described above, the refueling gun, 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 and / or the second section of the oil and gas channel.

[0009] As described above, the valve core further comprises: a reset device, which is sleeved on the first section of the oil and gas channel and / or the second section of the oil and gas channel and abuts against the second surface of the valve core body, and is used to restore the valve core from the second position to the first position.

[0010] As described above, the refueling gun, the second surface of the valve core body includes: one or more conical or cylindrical protrusions or guide strips, when the flat plate covers the first section of the oil and gas channel and / or the second section of the oil and gas channel, the protrusions or the guide strips extend into the first section of the oil and gas channel and / or the second section of the oil and gas channel.

[0011] In the refueling gun 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.

[0012] As described above, the cover plate includes: one or more air holes, which are used to balance the air pressure in the cavity.

[0013] The refueling gun as described above further comprises: an air collecting hood, which is arranged on the barrel assembly, and the air collecting hood comprises an outer shell and a sealing sheet, and the sealing sheet is arranged at the opening of the outer shell and sleeved on the air pipe.

[0014] The refueling gun of the present application integrates a switching valve, so that the air path between the switching valve and the air collecting hood is simple and fixed, and does not need to be adjusted for different oil guns; the structure is simple and the cost is low, and the oil and gas recovery system does not need to add more accessories, which is conducive to maintaining the simplicity of the system and can also meet the refueling needs of different 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 1 A schematic diagram of a refueling gun according to an embodiment of the present application;

[0017] Figure 2 A side view of a fuel gun according to an embodiment of the present application;

[0018] Figure 3A and Figure 3B A cross-sectional view of a fuel gun according to one embodiment of the present application; and

[0019] Figure 4A and Figure 4B It is a cross-sectional view of a refueling gun according to one implementation of the present application. DETAILED DESCRIPTION

[0020] 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.

[0021] 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.

[0022] 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 oil vapor during the refueling process. For such vehicles, the refueling gun does not need to recover oil vapor during the refueling process. This leads to two completely different refueling situations, and the current refueling guns are not compatible with the above two situations.

[0023] 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.

[0024] The present application proposes a refueling gun, which can control the oil and gas passage. When refueling a traditional vehicle, the oil and gas passage can be controlled to be connected, and the oil vapor generated by refueling can be recovered; when refueling an ORVR vehicle, the oil and gas passage can be controlled 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.

[0025] 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.

[0026] Figure 1 It is a schematic diagram of a refueling gun according to an embodiment of the present application. Figure 2 It is a side view of a fuel gun according to one embodiment of the present application. Figure 3A and Figure 3B It is a cross-sectional view of a refueling gun according to one implementation of the present application. Figure 4A and Figure 4B It is a cross-sectional view of a refueling gun according to one implementation of the present application.

[0027] As shown in the figure, the refueling gun (also referred to as "oil gun") 100 includes: a gun body, which includes a main body 110 and an oil and gas recovery switch valve (also referred to as "switch valve") 170. Among them, the oil and gas recovery switch valve 170 is arranged on the main body 110 and protrudes outward from the main body 110, and can be used to control the on and off of the oil and gas channel of the refueling gun, so that the refueling gun can meet the refueling of different vehicles. For example: when refueling a traditional vehicle, the oil and gas recovery switch valve 170 controls the oil and gas channel of the refueling gun to remain unobstructed, and the refueling gun recovers oil vapor normally. When refueling a vehicle equipped with ORVR, the oil and gas recovery switch valve 170 controls the oil and gas channel of the refueling gun to remain closed, and the refueling gun does not recover oil and gas.

[0028] In some embodiments, the body 110 may include an oil inlet 101 and an oil outlet 102, which are respectively arranged at both ends of the body 110. The oil inlet 101 can be connected to a hose through an inlet thread, and then the oil gun can be connected to the fuel dispenser. The oil of the fuel dispenser enters the body from the oil inlet, and then flows out of the body from the oil outlet. According to one embodiment of the present application, the body 110 can be cast. According to one embodiment of the present application, the material of the body 110 is a metal or alloy such as aluminum or stainless steel.

[0029] As shown in the figure, the refueling gun 100 also includes a valve assembly 120, a drive mechanism 130, a vacuum cap 140 and a barrel assembly 150 arranged between the oil inlet and the oil outlet of the body 110. The valve assembly 120 is used to allow or prevent the oil from passing through the body 110, and to allow or block the oil vapor from passing through the body 110 after recovery. The drive mechanism 130 is connected to the valve assembly 120, and controls the valve assembly 120 to open or close, thereby controlling 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 a locked state, the drive mechanism 130 becomes a whole and is in an available state. When the drive mechanism 130 is in an unlocked state, the drive mechanism 130 is unavailable and cannot control the opening and closing of the valve assembly 120. The barrel assembly 150 is arranged at the front of the body 110, and can be inserted into the fuel tank of the vehicle to add oil thereto. In some embodiments, the barrel assembly includes an oil pipe and an air pipe. The oil pipe can be used to accommodate oil passing through, and the air pipe is at least partially sleeved outside the oil pipe. The gap between the air pipe and the oil pipe can be used to accommodate oil and gas passing through.

[0030] In some embodiments, the main body 110 also includes multiple chambers for accommodating the above-mentioned components of the refueling gun, including but not limited to: a valve assembly chamber for accommodating the valve assembly 120, a drive mechanism chamber for accommodating the drive mechanism 130, a vacuum cap chamber for accommodating the vacuum cap 140, and a barrel assembly chamber for accommodating at least part of the barrel assembly 150.

[0031] In some embodiments, the main body 110 may also include a liquid channel 104 and an oil-gas channel 105 between the valve assembly cavity and the barrel assembly cavity; wherein the oil channel 104 defines a passage for the oil to enter the vehicle tank through the main body 110; and the oil-gas channel 105 defines a passage for the oil vapor to be recovered to the fuel dispenser through the main body 110.

[0032] In some embodiments, the body 110 may further include an oil pressure channel 106 between the valve assembly chamber and the vacuum cap chamber and an air pressure channel 107 between the vacuum cap chamber and the barrel assembly chamber. 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 drive mechanism 130, so that it enters a usable state. One end of the air pressure channel 107 is connected to the vacuum cap chamber, and the other end is connected to the venturi valve. When the venturi valve extracts air from the vacuum cap 140 through the air pressure channel 107, the vacuum cap can be separated from the drive mechanism 130, so that it enters a non-usable state.

[0033] In some embodiments, the fuel gun 100 further includes a trigger 160 located outside the body 110, which is connected to the drive mechanism 130 through a conversion member 161 and can be used to control the drive mechanism. In some embodiments, the conversion member 161 can be located outside the body, and one end of the conversion member 161 is connected to the trigger 160. One or both sides of the body include an opening 103, and the other end of the conversion member 161 is connected to the drive mechanism 130 through the opening 103. In the locked state, when the trigger 160 is pulled, the drive mechanism 130 can be pushed via the conversion member 161, thereby controlling the valve assembly 120.

[0034] In some embodiments, the refueling gun may further include a guard bow 164, which is disposed on the outside of the trigger 160 and is detachably connected to the gun body 110 to protect the hands when refueling. In some embodiments, the guard bow 164 includes one or more pins 165, which are used to clamp the trigger 160, so that the operator can fix the trigger 160 when refueling. Correspondingly, the trigger 160 also includes a clamping structure, which is disposed at the tail of the trigger 160 and can be pushed and inserted into each pin of the guard bow 164, thereby providing different oil flow rates.

[0035] In some embodiments, the refueling gun 100 may further include an air collecting hood 180, which is arranged on the barrel assembly and sleeved outside the air pipe, and can be used to seal the refueling port of the vehicle when the vehicle is refueling to prevent oil and gas from leaking outside the gas station. In some embodiments, the air collecting hood 180 may include a shell 181 and a sealing sheet 182. Among them, the sealing sheet is arranged at the opening of the shell, and contacts and seals with the refueling port of the vehicle when the vehicle is refueling. In some embodiments, the side of the sealing sheet 182 facing the vehicle fuel tank port is an arc-shaped surface that is approximately spherical, which is conducive to the refueling gun adapting to the fuel tank ports of different vehicles and can be effectively sealed.

[0036] In some embodiments, the oil and gas recovery switch valve 170 may include a boss 171 and a valve core 172. The boss 171 is disposed on the body 110 and protrudes outside the body 110, wherein a portion of the oil and gas passage 105 is located in the boss 171. The valve core 172 may be disposed in the boss and may move between a first position and a second position to control the on-off of the oil and gas passage located in the boss.

[0037] refer to Figure 4BIn some embodiments, the boss includes a first section of oil and gas channel 1051 and a second section of oil and gas channel 1052 arranged in sequence. When the valve core is in the first position, the first section of oil and gas channel and the second section of oil and gas channel are connected. When the valve core is in the second position, the first section of oil and gas channel and the second section of oil and gas channel are blocked. In some embodiments, the first section of oil and gas channel 1051 and the second section of oil and gas channel 1052 are arranged in the boss and extend in the boss along the direction in which the boss protrudes relative to the body 110.

[0038] In some embodiments, the boss 171 is similar to a cylindrical shape, which can be integrally cast with the body and located at the lower part of the body 110, close to the barrel assembly and the guard bow, so that it will not have any impact when refueling or hanging the oil gun on the fuel dispenser, avoiding affecting the use of the oil gun and facilitating the operation of the staff. In some embodiments, the interior of the boss includes a cavity 1711, and the first section of the oil and gas channel and the second section of the oil and gas channel extend into the cavity and are connected to each other. The cavity can also be used to accommodate the valve core and can accommodate the movement of the valve core between the first position and the second position. In some embodiments, the end faces of the first section of the oil and gas channel and the second section of the oil and gas channel extending into the cavity are processed flat, which can be used to seal with the valve core when the switch valve is closed.

[0039] In some embodiments, the boss 171 includes an openable cover plate 1712, which can open or close the cavity 1711. In some embodiments, the shape of the cover plate 1712 can be circular, and it is arranged on the end face of the boss. In some embodiments, the side wall of the cavity may include a slot, and the cover plate can be snapped into the slot. Of course, as those skilled in the art will appreciate, the cover plate can also have other openable connection methods, all of which can be applied to the technical solutions of the present application. In some embodiments, the cover plate includes one or more air holes 1713, and when the valve core moves between the first position and the second position, the air holes can be used to balance the air pressure in the cavity, so as to ensure that the valve core can move freely.

[0040] refer to Figure 3BIn some embodiments, the valve core 172 includes: a valve core body 1721, which is arranged in the cavity 1711 and can close the first section of the oil and gas channel 1051 and / or the second section of the oil and gas channel 1052, so as to control the blocking of the oil and gas channel. In some embodiments, the valve core body 1721 may include a flat plate 1722, and the center of the first surface thereof may include a protruding stud 1723. When the valve core is in the second position, that is, when the oil and gas channel needs to be blocked, the flat plate 1722 covers the first section of the oil and gas channel 1051 and / or the second section of the oil and gas channel 1052. In some embodiments, the second surface of the valve core body 1721 may also include a plurality of guide strips. When the flat plate 1722 covers the first section of the oil and gas channel 1051 and / or the second section of the oil and gas channel 1052, the guide strips 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 prevent 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. In some embodiments, the second surface of the valve core body 1721 may also include one or more cylindrical or conical protrusions.

[0041] In some embodiments, the valve core 172 may further include a diaphragm 1725 and a valve seat 1726. The diaphragm 1725 is disposed in the cavity 1711 and separates the cavity 1711, and the valve seat 1726 connects the valve core body 1721 to the diaphragm 1725. In some embodiments, the diaphragm 1725 may include an opening, which can accommodate the protruding stud 1723 on the valve core body 1721 to pass through, and the two are connected together by the valve seat 1726. In some embodiments, the valve seat 1726 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 1725 and the valve seat 1726, which can protect the diaphragm, 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.

[0042] In some embodiments, the shape of the diaphragm 1725 can be similar to the shape of the cover plate 1712, and the diaphragm 1725 can be clamped between the boss and the cover plate, and the diaphragm can be fixed in the cavity 1711 through the openable cover plate, so that the valve core body can be fixed in the cavity. 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.

[0043] In some embodiments, the diaphragm 1725 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.

[0044] In some embodiments, the valve core 172 may further include a reset device 1727, which is sleeved on the outside of the second portion of the oil and gas channel and abuts against the second surface of the valve core body 1721, and can support the valve core body and reset the valve core body. In some embodiments, the reset device may be a reset spring, which is sleeved on the outside of the second portion 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.

[0045] The refueling gun of the present application, when refueling a non-ORVR vehicle, the volatile oil and gas in the fuel tank can be normally pumped back to the underground storage tank through the oil and gas channel of the oil gun, the switch valve, and the hose by the vacuum pump. In the process of oil and gas flowing through the oil gun, static pressure will be lost, forming a certain degree of vacuum, which is overcome by the elastic force of the return spring to keep the diaphragm in an open state; when refueling a vehicle with ORVR, the oil and gas in the fuel tank cannot be pumped away by the oil and gas recovery system, the oil tank port and the gun barrel are in a sealed state under the sealing effect of the air collecting hood, and the oil and gas recovery system cannot inhale air from the outside, and a vacuum will be created in the entire oil and gas channel, forming a pressure difference on both sides of the diaphragm of the switch valve, causing the diaphragm to move to the vacuum side, sealing the valve core body in the first section of the oil and gas channel and / or the second section of the oil and gas channel in the boss, thereby closing the oil and gas channel and reducing the gas-liquid ratio obtained by the oil and gas recovery system. When refueling is finished, the oil gun is removed from the oil tank port, and the oil and gas recovery system stops running at the same time, the vacuum in the oil and gas channel disappears, and the diaphragm returns to its original position under the action of the return spring.

[0046] The refueling gun of the present application integrates a switch valve, so that the air path between the switch valve and the gas collecting hood is simple and fixed, and does not need to be adjusted for different oil guns; the structure is simple and the cost is low, and the oil and gas recovery system does not need to add additional accessories, which is conducive to maintaining system simplicity.

[0047] 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. A refueling gun, characterized in that: include: A gun body, comprising a main body and a boss protruding outward from the main body, the gun body comprising a liquid channel for oil liquid to pass through and an oil and gas channel for oil gas recovery, wherein at least part of the oil and gas channel is located in the boss; a valve assembly disposed in the valve assembly cavity of the gun body and configured to allow or prevent oil from passing through the liquid passage and oil gas from passing through the oil gas passage; A drive mechanism disposed in the drive mechanism chamber of the gun body and configured to control the opening or closing of the valve assembly; A gun barrel assembly, which is at least partially disposed in a gun barrel assembly cavity of a gun body, the gun barrel assembly comprising an oil pipe and an air pipe, the oil pipe being configured to accommodate oil passing therethrough, the air pipe being at least partially sleeved outside the oil pipe, and a gap between the air pipe and the oil pipe being configured to accommodate oil and gas passing therethrough; and A valve core is disposed in the boss and moves between a first position and a second position so as to control the opening and closing of the oil and gas passage in the boss; Among them, the boss includes a first section of oil and gas channel and a second section of oil and gas channel arranged in sequence. When the valve core is located at the first position, the first section of the oil and gas channel and the second section of the oil and gas channel remain connected. When the valve core is located at the second position, the first section of the oil and gas channel and the second section of the oil and gas channel remain blocked.

2. The refueling gun according to claim 1, characterized in that: The boss includes a cavity inside, the cavity is communicated with the first section of the oil and gas passage and the second section of the oil and gas passage, and is used to accommodate the valve core.

3. The refueling gun according to claim 2, characterized in that: The boss includes an openable cover plate, and the cover plate can open or close the cavity.

4. The refueling gun 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.

5. The refueling gun according to claim 4, characterized in that: The valve core body includes a flat plate, and the center of the first surface thereof 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 and / or the second section of the oil and gas channel.

6. The refueling gun according to claim 5, characterized in that: The valve core also includes: a reset device, which is sleeved on the first section of the oil and gas channel and / or the second section of the oil and gas channel and abuts against the second surface of the valve core body, and is used to restore the valve core from the second position to the first position.

7. The refueling gun according to claim 5, characterized in that: The second surface of the valve core body includes: one or more conical or cylindrical protrusions or guide strips, when the flat plate covers the first section of the oil and gas channel and / or the second section of the oil and gas channel, the protrusions or the guide strips extend into the first section of the oil and gas channel and / or the second section of the oil and gas channel.

8. The refueling gun according to claim 4, 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.

9. The refueling gun according to claim 3, characterized in that: The cover plate includes: one or more air holes, which are used to balance the air pressure in the cavity.

10. The refueling gun according to claim 1, characterized in that: Further including: The gas collecting hood is arranged on the gun barrel assembly, and the gas collecting hood comprises an outer shell and a sealing sheet. The sealing sheet is arranged at the opening of the outer shell and sleeved on the air pipe.

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