Oil gun
By designing the linkage control of oil passages, gas passages and valve components of the refueling gun, the problems of complex processing, large weight and high flow resistance of the existing refueling gun are solved. They are compatible with ORVR function cars, improving reliability and applicability.
Patent Information
- Application Number
- CN202422119788.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-08-30
AI Technical Summary
The existing fuel guns have problems such as complex assembly and processing technology, large weight, high flow resistance and low reliability, and are also unable to be compatible with cars with or without ORVR functions.
A refueling gun is designed, including oil passage, gas passage, valve assembly and auxiliary gas passage on-off assembly. The oil passage and gas passage opening and off-off are controlled through the linkage between the oil passage valve core and the gas passage valve core, and are compatible with cars with or without ORVR function.
It achieves a simple structure and high reliability, and can automatically close the gas passage, prevent air from entering the secondary oil and gas recovery system, and is compatible with the refueling needs of different types of cars.
Smart Images
Figure CN223118143U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of refueling equipment, and particularly to a fuel gun. Background Art
[0002] A fuel gun is an essential device in a gas station. As the output terminal of a fuel dispenser, it is inserted into the vehicle fuel tank to send gasoline into the fuel tank.
[0003] During the process of a gas station refueling a user's fuel tank, the oil product is moved from the oil storage equipment to the user's fuel tank, and the vaporized oil and gas in the fuel tank will be released into the atmosphere, polluting the environment.
[0004] To avoid the overflow of oil and gas from the vehicle fuel tank, the industry's approach is to exchange the volume of the oil and gas in the vehicle fuel tank with the oil product in the oil storage equipment to achieve secondary oil and gas recovery. The secondary oil and gas recovery system is a system that displaces the oil and gas in the user's fuel tank into the oil storage equipment while adding the oil product to the user's fuel tank.
[0005] With the maturity of oil and gas recovery technology, fuel guns of the oil and gas recovery type have been widely used in the market. However, fuel guns with oil and gas recovery functions, as end products of oil and gas recovery, generally have disadvantages such as complex assembly and processing technology, large weight, high flow resistance, and low reliability.
[0006] Meanwhile, in order to meet the fuel vehicle pollution emission standards, newly produced vehicles are all equipped with an Onboard Refueling Vapor Recovery (ORVR) system. The ORVR system comes with a carbon canister that can adsorb the oil and gas generated during refueling and can also solve the oil and gas generated due to factors such as the temperature difference in the vehicle fuel tank. The ORVR system has a desorption function that desorbs the adsorbed oil and gas and sends it into the vehicle internal combustion engine for combustion to achieve recycling and reduce pollutant emissions.
[0007] The service life of a vehicle is usually more than ten years, and new vehicles with ORVR functions and old vehicles without ORVR functions coexist. Therefore, a fuel gun is needed that can be compatible with two different types of vehicles and requires simple assembly and processing technology and high reliability. Utility Model Content
[0008] In view of the above-mentioned actual needs and the disadvantages of the existing technology, the purpose of this application is to provide a fuel gun, which is used to solve the problems that fuel guns with oil and gas recovery functions generally have complex assembly and processing technology, large weight, high flow resistance, and low reliability, and at the same time be compatible with the refueling needs of two types of vehicles with or without ORVR functions.
[0009] An embodiment of the present application provides a fuel gun, including a gun body, characterized in that the gun body includes an oil passage, a gas passage, a valve assembly, and an auxiliary gas passage on-off assembly;
[0010] The oil passage and the gas passage are arranged in the gun body;
[0011] One end of the oil passage is provided with an oil nozzle for inserting into an automobile fuel tank, and the other end of the oil passage is communicated with an oil storage device;
[0012] An air hood is arranged around the oil nozzle, and the space formed by the enclosure of the air hood and the oil nozzle is communicated with one end of the gas passage, and the other end of the gas passage is communicated with a secondary oil and gas recovery system;
[0013] The valve assembly is arranged between the oil passage and the oil nozzle and between the gas passage and the secondary oil and gas recovery system, and is used for simultaneously opening or closing the oil passage and the gas passage;
[0014] The auxiliary gas passage on-off assembly is arranged on the gas passage and is used for realizing the superimposed on-off control of the gas passage.
[0015] In some embodiments, the gas passage includes a first gas passage and a second gas passage. The first gas passage is located on the side close to the air hood, and the second gas passage is located on the side close to the valve assembly. The auxiliary gas passage on-off assembly is arranged between the first gas passage and the second gas passage.
[0016] In some embodiments, the auxiliary gas passage on-off assembly includes a housing and a blocking portion. The housing is fixedly connected to the gun body, and the housing and the blocking portion enclose a cavity. The cavity is communicated with the first gas passage. A third gas passage is arranged in the cavity. One end of the third gas passage is communicated with the second gas passage, and the other end of the third gas passage is provided with an opening. The third gas passage is communicated with the cavity through the opening. One side of the blocking portion is communicated with the outside atmosphere, and the other side of the blocking portion is arranged parallel to the plane where the opening is located and has a gap with the opening. When the air pressure in the first gas passage is lower than the outside atmospheric pressure, the blocking portion moves towards the opening and blocks the third gas passage.
[0017] In some embodiments, the material of the blocking portion corresponding to the opening area is a soft material, and the blocking portion is in a sealed state when contacting the opening.
[0018] In some embodiments, the third gas path channel is cylindrical, and the non-opening end is fixedly connected to the inner wall of the cavity; the auxiliary gas path on-off component includes a return spring, the return spring is sleeved on the outer wall of the third gas path channel, one end of the return spring abuts against the inner wall of the cavity, and the other end abuts against the blocking portion; when there is no air pressure difference between the cavity and the outside, the return spring assists the blocking portion to reset.
[0019] In some embodiments, the auxiliary gas path on-off component includes a protective cover, which is located outside the blocking portion and fixedly connected to the housing.
[0020] In some embodiments, the valve assembly includes a valve body, a sealing seat and a valve core. The valve body is fixedly connected to the gun body. The valve body is divided into a first chamber and a second chamber for the valve core to pass through by the sealing seat. The first chamber is communicated with the oil storage device, and the second chamber is communicated with the second gas path channel.
[0021] In some embodiments, the valve core includes an oil path valve core and a gas path valve core. The sealing seat is sleeved outside the gas path valve core, and the sealing seat is movably and sealingly contacted with the gas path valve core. The oil path valve core controls the on-off between the first chamber and the oil nozzle, and the gas path valve core controls the on-off between the second chamber and the secondary oil and gas recovery system.
[0022] In some embodiments, the oil path valve core and the gas path valve core are sleeved and linked to control the on-off of the oil path channel and the gas path channel simultaneously.
[0023] In some embodiments, the gas hood is provided with through holes.
[0024] As described above, a fuel dispenser of the present application has the following beneficial effects: the oil path valve core and the gas path valve core are sleeved and linked, with a simple structure and high reliability; when refueling a vehicle with an ORVR function, the gas path channel can be automatically closed to avoid additional air from entering the secondary oil and gas recovery system. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] The following drawings detail the exemplary embodiments disclosed in the present application. Wherein the same reference numerals represent similar structures in several views of the drawings. Those of ordinary skill in the art will understand that these embodiments are non-limiting, exemplary embodiments, and the drawings are only for the purpose of illustration and description, and are not intended to limit the scope of the present application. Embodiments in other ways may also achieve the inventive intent in the present application. It should be understood that the drawings are not drawn to scale.
[0026] Wherein:
[0027] Figure 1 is a schematic diagram of a fuel dispenser according to some embodiments of the present application;
[0028] Figure 2 is Figure 1 An enlarged schematic view of area A in
[0029] Figure 3 is Figure 1 An enlarged schematic view of area B in
[0030] Figure 4 A schematic view of the through holes of the fuel gun mask shown in some embodiments of the present application
[0031] Figure 5 A cross-sectional view of the fuel gun mask including through holes shown in some embodiments of the present application Detailed implementation manners
[0032] The following description provides specific application scenarios and requirements of the present application, aiming to enable those skilled in the art to manufacture and use the content of the present application. For those skilled in the art, various partial modifications to the disclosed embodiments are obvious, and the general principles defined here can be applied to other embodiments and applications without departing from the spirit and scope of the present application. Therefore, the present application is not limited to the disclosed embodiments, but has the broadest scope consistent with the claims.
[0033] An embodiment of the present application provides a fuel gun, the gun body of which includes an oil passage, a gas passage, a valve assembly, and an auxiliary gas passage on-off assembly. The oil passage and the gas passage are arranged in the gun body and are isolated from each other. Among them, one end of the oil passage is provided with an oil nozzle for inserting into the vehicle fuel tank, and the other end of the oil passage communicates with the oil storage device; an air hood is arranged around the oil nozzle, and the space formed by the enclosure of the air hood and the oil nozzle communicates with one end of the gas passage to provide a gas source for secondary oil and gas recovery, and the other end of the gas passage communicates with the secondary oil and gas recovery system. The valve assembly is arranged between the oil passage and the oil nozzle and between the gas passage and the secondary oil and gas recovery system for simultaneously opening or closing the oil passage and the gas passage. The auxiliary gas passage on-off assembly is arranged on the gas passage to automatically realize the superimposed on-off control of the gas passage according to the structure of the vehicle fuel tank to be refueled. When refueling, the oil passage and the gas passage are simultaneously conducted, but for vehicles with ORVR function, external oil and gas recovery is no longer required. If the gas passage continues to be conducted, ordinary air will be sucked into the secondary oil and gas recovery system, causing idling and waste.
[0034] The technical solution of the present application will be described in detail below in conjunction with the embodiments and the drawings.
[0035] Refer to Figure 1Schematic diagram of a fuel gun shown. A fuel gun of the present application includes a gun body 1, and the gun body 1 includes an oil passage 2, a gas passage 3, a valve assembly 4, and an auxiliary gas passage on-off assembly 5. The oil passage 2 and the gas passage 3 are arranged inside the gun body 1 and are isolated from each other. Among them, one end of the oil passage 2 is provided with an oil nozzle 21 for inserting into an automobile fuel tank (not shown), and the other end of the oil passage 2 communicates with an oil storage device (not shown); an air hood 22 is arranged around the oil nozzle 21, and the space formed by the enclosure of the air hood 22 and the oil nozzle 21 communicates with one end of the gas passage 3 to provide a gas source for secondary oil and gas recovery. The other end of the gas passage 3 is connected to the valve assembly 4 and further communicates with a secondary oil and gas recovery system (not shown). The valve assembly 4 is arranged between the oil passage 2 and the oil nozzle 21 and between the gas passage 3 and the secondary oil and gas recovery system, and is used to open or close the oil passage 2 and the gas passage 3 simultaneously. The auxiliary gas passage on-off assembly 5 is arranged on the gas passage 3 and automatically realizes the superimposed on-off control of the gas passage 3 according to the structure of the automobile fuel tank being refueled.
[0036] Specifically, in some embodiments, the gas passage 3 includes a first gas passage 31 and a second gas passage 32. The first gas passage 31 is located on the side close to the air hood 22, and the second gas passage 32 is located on the side close to the valve assembly 4. The auxiliary gas passage on-off assembly 5 is arranged between the first gas passage 31 and the second gas passage 32 to control the on-off of the passage between the first gas passage 31 and the second gas passage 32. Once the passage of the auxiliary gas passage on-off assembly 5 is blocked, then the entire gas passage 3 is blocked.
[0037] Figure 2 is Figure 1 An enlarged schematic diagram of area A in it, and also an enlarged schematic diagram of the auxiliary gas passage on-off assembly 5. In some embodiments, the auxiliary gas passage on-off assembly 5 includes a housing 51 and a blocking portion 52. The housing 51 is fixedly connected to the gun body 1. The housing 51 and the blocking portion 52 enclose a cavity 53; the cavity 53 communicates with the first gas passage 31, and a third gas passage 54 is arranged in the cavity 53. One end of the third gas passage 54 communicates with the second gas passage 32, and the other end of the third gas passage 54 is provided with an opening 541, and the third gas passage 54 communicates with the cavity 53 through the opening 541. One side of the blocking portion 52 communicates with the outside atmosphere, and the other side of the blocking portion 52 is arranged parallel to the plane where the opening 541 is located and has a gap with the opening 541. When the air pressure in the first gas passage 31 is lower than the outside atmospheric pressure, that is, when the air pressure in the cavity 53 is lower than the outside atmospheric pressure, the blocking portion 52 moves towards the opening 541 and blocks the third gas passage 54.
[0038] Further, referring to Figure 2As shown, in some embodiments, the material of the barrier portion 52 corresponding to the opening 541 is a soft material, and the barrier portion 52 is in a sealed state when in contact with the opening 541, that is, the opening 541 of the third gas path channel 54 is blocked. At this time, the third gas path channel 54 is no longer connected to the first gas path channel 31, that is, the first gas path channel 31 is not connected to the second gas path channel 32, so the gas path channel 3 is blocked. For example, the central area of the barrier portion 52 corresponding to the opening 541 can be a soft diaphragm, and the surrounding area can be an elastic support. When the diaphragm is subjected to pressure, the surrounding elastic support can support the diaphragm to move in a larger range, so that the diaphragm and the opening 541 are better fitted and sealed.
[0039] In some embodiments, the third gas path channel 54 is cylindrical, and one non-open end is fixedly connected to the inner wall of the shell 51, and is connected to the second gas path channel 32. The auxiliary gas path on-off assembly 5 includes a reset spring 55, which is sleeved on the outer wall of the third gas path channel 54, and one end of the reset spring 55 abuts against the inner wall of the shell 51, and the other end abuts against the barrier 52. When refueling a car without ORVR function, or when the refueling gun is pulled out of the car tank, there is no air pressure difference between the cavity 53 and the outside world, and the reset spring 55 assists the barrier 52 in resetting, and the gas path channel 3 is open.
[0040] Furthermore, in some embodiments, the auxiliary gas path on-off assembly 5 includes a protective cover 56, which is located outside the barrier portion 52 and is fixedly connected to the housing 51 to physically protect the barrier portion 52. The protective cover 56 is provided with a through hole 561 to ensure that the outside of the barrier portion 52 is connected to the outside atmosphere.
[0041] Figure 3 yes Figure 1 The enlarged schematic diagram of the B area is also an enlarged schematic diagram of the valve assembly 4. In some embodiments, the valve assembly 4 includes a valve body 41, a sealing seat 42 and a valve core 43. The valve body 41 is fixedly connected to the gun body 1, and the valve body 41 is divided by the sealing seat 42 into a first chamber 411 and a second chamber 412 for the valve core 43 to pass through. The first chamber 411 is connected to the oil storage device, and the second chamber 412 is connected to the second gas path channel 32.
[0042] Furthermore, the valve core 43 includes an oil circuit valve core 431 and an air circuit valve core 432. The sealing seat 42 is sleeved outside the air circuit valve core 432 and is movably sealed and contacted with the air circuit valve core 432. The oil circuit valve core 431 controls the connection and disconnection between the first chamber 411 and the oil nozzle 21, and the air circuit valve core 432 controls the connection and disconnection between the second chamber 412 and the fourth air circuit channel 33 (connected to the secondary oil and gas recovery system).
[0043] refer to Figure 3 Shown and combined Figure 1, in some embodiments, the oil-way valve core 431 and the gas-way valve core 432 are sleeved and linked to control the on / off of the oil-way passage 2 and the gas-way passage 3 simultaneously. When the oil-way valve core 431 and the gas-way valve core 432 are in the initial position, they are in a closed state. When the trigger switch 7 of the fuel gun is pulled, the ejector rod 6 is actuated to move in the direction of the oil-way valve core 431, pushing open the oil-way valve core 431 and the gas-way valve core 432, and opening the passages between the first chamber 411 and the nozzle 21, and between the second chamber 412 and the fourth gas-way passage 33 (connected to the secondary oil-gas recovery system) respectively. After refueling, the ejector rod 6 is released, and the first spring 44 and the second spring 45 push the oil-way valve core 431 and the gas-way valve core 432 back to the initial position respectively, thereby closing the passages between the first chamber 411 and the nozzle 21, and between the second chamber 412 and the fourth gas-way passage 33 (connected to the secondary oil-gas recovery system) respectively, and restoring the closed state.
[0044] In some embodiments, the surface roughness range of the gas-way valve core 432 is Ra0.2 - Ra0.8, which can reduce the frictional resistance, lower the processing difficulty and processing cost. By reducing the surface roughness of the gas-way valve core 432, the frictional resistance between the sealing seat 42 and the gas-way valve core 432 can be effectively reduced, thereby reducing the pre-tightening force of the second spring 45. As the frictional resistance and the pre-tightening force decrease, the force required to press the trigger switch also decreases, making the operation of the fuel gun smoother and improving the feel of the fuel gun.
[0045] When refueling a vehicle without ORVR function, according to the requirements stipulated by the national standard, the air-liquid ratio is in the range of 1.0 - 1.2, and the volume of the recovered oil gas is more than that of the refueled oil. To balance the air pressure in the vehicle fuel tank and prevent frequent nozzle shut-off due to negative pressure during refueling, in some embodiments, referring to Figure 4 and Figure 5 as shown, through holes 221 are provided on the gas hood 22, and the internal space enclosed by the gas hood 22 communicates with the external atmosphere, which can balance the air pressure in the oil-way passage 2 and the gas-way passage 3 when refueling a vehicle without ORVR function, so as to ensure normal refueling of the vehicle without ORVR function. Preferably, referring to Figure 4 as shown, the number of the through holes 221 is two, and the diameter range of the through holes 221 is 2mm - 5mm, which can ensure both the function of air supplement when the air pressure in the oil-way passage 2 and the gas-way passage 3 is unbalanced and does not affect the main function of the gas hood 22 in collecting oil gas.
[0046] The beneficial effects that may be brought about by the embodiments of the present application include, but are not limited to: Through the sleeve linkage of the oil circuit valve core and the gas circuit valve core, the fuel gun of the present application realizes the simultaneous opening or closing of the oil circuit channel and the air flow channel. It has a simple structure, low processing difficulty and cost, and high reliability; when refueling a vehicle with an ORVR function, the gas circuit channel can be automatically closed to prevent additional air from entering the secondary oil and gas recovery system, thus being compatible with vehicle fuel tanks with and without the ORVR function and having a wider application range.
[0047] It should be noted that the beneficial effects that may be produced by different embodiments are different. In different embodiments, the beneficial effects that may be produced can be any one or several combinations of the above, or any other beneficial effects that may be obtained.
[0048] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only an example and does not constitute a limitation to this specification. Although not explicitly stated here, those skilled in the art may make various modifications, improvements and corrections to the present application. Such modifications, improvements and corrections are proposed in this specification, so such modifications, improvements and corrections still fall within the spirit and scope of the exemplary embodiments of the present application.
[0049] It should be noted that in the description of the present application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection; it can be a rotational connection, a sliding connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood in combination with specific situations.
[0050] In addition, when the terms "first", "second", "third", etc. are used in the description of the present application to describe various features, these terms are only used to distinguish these features and cannot be understood as indicating or implying the relevance, relative importance or implicitly indicating the number of the indicated features.
[0051] In addition, the specification of the present application describes exemplary embodiments by referring to idealized exemplary cross-sectional views and / or plan views and / or perspective views. Therefore, differences from the illustrated shapes due to, for example, manufacturing techniques and / or tolerances are foreseeable. Accordingly, the exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but should include deviations in the shapes caused by, for example, manufacturing. Thus, the regions shown in the figures are substantially schematic, and their shapes are not intended to show the actual shape of the regions of the device nor to limit the scope of the exemplary embodiments.
[0052] Meanwhile, the present application uses specific terms to describe the embodiments of this specification. Terms such as "one embodiment", "an embodiment", and / or "some embodiments" mean a certain feature, structure, or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that the "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more at different positions in the present application does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the present application may be combined appropriately.
[0053] Similarly, it should be noted that, in order to simplify the presentation of the disclosure of the present application and thus assist in the understanding of one or more inventive embodiments, in the foregoing description of the embodiments of the present application, sometimes multiple features are grouped into one embodiment, drawing, or description thereof. However, this method of disclosure does not mean that the features required by the subject matter of the present application are more than those mentioned in the claims. In fact, the features of the embodiments are fewer than all the features of the single embodiments disclosed above.
[0054] Finally, it should be understood that the embodiments described in the present application are only used to illustrate the principles of the embodiments of the present application. Other variations may also fall within the scope of the present application. Therefore, by way of example and not limitation, alternative configurations of the embodiments of the present application may be considered consistent with the teachings of the present application. Accordingly, the embodiments of the present application are not limited to the embodiments explicitly introduced and described in the present application.
Claims
1. A fuel dispenser gun, comprising a gun body, characterized in that, The gun body includes an oil passage, a gas passage, a valve assembly, and an auxiliary gas passage on-off assembly; The oil passage and the gas passage are arranged inside the gun body; One end of the oil passage is provided with an oil nozzle for inserting into an automobile fuel tank, and the other end of the oil passage is communicated with an oil storage device; A gas hood is arranged around the oil nozzle, and the space formed by the enclosure of the gas hood and the oil nozzle is communicated with one end of the gas passage, and the other end of the gas passage is communicated with a secondary oil and gas recovery system; The valve assembly is arranged between the oil passage and the oil nozzle and between the gas passage and the secondary oil and gas recovery system for simultaneously opening or closing the oil passage and the gas passage; The auxiliary gas passage on-off assembly is arranged on the gas passage for realizing the superimposed on-off control of the gas passage.
2. The fuel gun according to claim 1, characterized in that, The gas passage includes a first gas passage and a second gas passage. The first gas passage is located on the side close to the gas hood, and the second gas passage is located on the side close to the valve assembly. The auxiliary gas passage on-off assembly is arranged between the first gas passage and the second gas passage.
3. The fuel dispenser gun according to claim 2, characterized in that, The auxiliary gas passage on-off assembly includes a housing and a blocking portion. The housing is fixedly connected to the gun body, and a cavity is formed by the enclosure of the housing and the blocking portion. The cavity is communicated with the first gas passage, and a third gas passage is arranged in the cavity. One end of the third gas passage is communicated with the second gas passage, and an opening is arranged at the other end of the third gas passage. The third gas passage is communicated with the cavity through the opening. One side of the blocking portion is communicated with the outside atmosphere, and the other side of the blocking portion is arranged parallel to the plane where the opening is located and has a gap with the opening. When the air pressure in the first gas passage is lower than the outside atmospheric pressure, the blocking portion moves towards the opening and blocks the third gas passage.
4. The fuel dispenser gun according to claim 3, characterized in that, The material of the blocking portion corresponding to the opening area is a soft material, and the blocking portion is in a sealed state when contacting the opening.
5. The fuel gun according to claim 3, characterized in that, The third gas passage is cylindrical, and the non-opening end is fixedly connected to the inner wall of the cavity. The auxiliary gas passage on-off assembly includes a return spring, which is sleeved on the outer wall of the third gas passage. One end of the return spring abuts against the inner wall of the cavity, and the other end abuts against the blocking portion. When there is no air pressure difference between the cavity and the outside, the return spring assists the blocking portion to reset.
6. The fuel dispenser gun according to claim 3, wherein The auxiliary gas passage on-off assembly includes a protective cover, which is located outside the blocking portion and fixedly connected to the housing.
7. The fuel dispenser gun according to claim 2, wherein, The valve assembly includes a valve body, a sealing seat, and a valve core. The valve body is fixedly connected to the gun body, and the valve body is divided into a first chamber and a second chamber for the valve core to pass through by the sealing seat. The first chamber is communicated with the oil storage device, and the second chamber is communicated with the second gas passage.
8. The fuel dispenser gun according to claim 7, characterized in that The spool includes an oil circuit spool and a gas circuit spool; the sealing seat is sleeved outside the gas circuit spool, and the sealing seat is movably and sealingly contacted with the gas circuit spool; the oil circuit spool controls the on-off between the first chamber and the oil nozzle, and the gas circuit spool controls the on-off between the second chamber and the secondary oil and gas recovery system.
9. The fuel gun according to claim 8, characterized in that, The oil circuit spool and the gas circuit spool are sleeved and linked to control the on-off of the oil circuit channel and the gas circuit channel at the same time.
10. The fuel dispenser gun according to claim 1, characterized in that, The gas hood is provided with through holes.