CN211496926U - Oil gun - Google Patents

Abstract

The utility model relates to a nozzle, include: a gun body, comprising: the oil inlet, the oil outlet and a liquid channel for oil to pass through between the oil inlet and the oil outlet; a valve assembly disposed within the gun body configured to allow or prevent oil from passing through the liquid passage; the driving mechanism is arranged in the gun body and is configured to control the valve component to be opened or closed; the valve component comprises an oil circuit valve, the oil circuit valve comprises an oil circuit valve seat and an oil circuit valve core, when the oil circuit valve core is configured to abut against the oil circuit valve seat, oil is forbidden to pass through an oil liquid channel, wherein the radius of the oil circuit valve core is approximately the same as that of a liquid channel in front of the oil circuit valve, or the difference between the radius of the oil circuit valve core and the radius of the liquid channel in front of the oil circuit valve is smaller than. This application oil gun simple structure, easily assembly, fluid import diameter is big moreover, can be so that the oil gun has higher velocity of flow.

Description

Oil gun

Technical Field

The utility model relates to an refueling equipment field relates to an oil gun very much.

Background

With the development of science and technology and the improvement of living standard, automobiles enter more and more households. The increasing number of cars has led to an ever expanding construction of gasoline stations. In daily life, a gasoline station comprises: the system comprises a fuel storage tank arranged underground and a plurality of refueling devices connected with the fuel storage tank. Each refueling device fills oil into the automobile through a refueling gun on the refueling device.

For a long time, the oil vapors generated during the refueling process can be emitted into the air in or near the service station. However, most of oil products such as gasoline or diesel oil of a gas station are volatile and have certain toxicity, and the ignition point is low, so that the oil products are easy to ignite and have potential safety hazards. With the increasing environmental protection requirements, the requirements for the problems of environmental protection, safety and the like of the gas station are also higher and higher. In order to reduce oil vapor in and around a gas station as much as possible, an oil vapor recovery technique is popularized, and a fuel gun having an oil vapor recovery function is widely used. However, the existing oil gun with the oil gas recovery function has the defects of short development time, unreasonable structure and low flow rate, and influences the oil filling efficiency.

Disclosure of Invention

To the technical problem who exists among the prior art, the utility model provides a nozzle, include: a gun body, comprising: the oil inlet, the oil outlet and a liquid channel for oil to pass through between the oil inlet and the oil outlet; a valve assembly disposed within the gun body configured to allow or prevent oil from passing through the liquid passage; the driving mechanism is arranged in the gun body and is configured to control the valve component to be opened or closed; the valve component comprises an oil circuit valve, the oil circuit valve comprises an oil circuit valve seat and an oil circuit valve core, when the oil circuit valve core is configured to abut against the oil circuit valve seat, oil is forbidden to pass through an oil liquid channel, wherein the radius of the oil circuit valve core is approximately the same as that of a liquid channel in front of the oil circuit valve, or the difference between the radius of the oil circuit valve core and the radius of the liquid channel in front of the oil circuit valve is smaller than.

The oil gun is characterized in that the part of the oil path valve seat, which is not contacted with the oil path valve core, is hollowed.

The fuel nozzle as described above, further comprising: and the diversion cone is arranged between the oil way valve core and the driving mechanism, and the diameter of the diversion cone is gradually reduced along the oil flowing direction.

The fuel nozzle as described above, wherein the nozzle body projects outwardly at a position close to the driving mechanism, configured to increase the width of the liquid passage in the nozzle body.

The fuel gun as described above, wherein the gun body further comprises a gas passage inside the gun body configured to recycle the collected oil vapor to the fuel dispenser; wherein the valve assembly comprises a gas circuit valve configured to allow or block oil vapor from passing through the gas passage; wherein, the oil circuit valve and the gas circuit valve are opened or closed simultaneously.

The oil gun comprises an oil gun body, an oil gun body and an oil gun body, wherein the oil gun body comprises an oil gun body and an oil gun body, the oil gun body comprises an oil gun body, an oil gun body and an oil gun body, the oil gun body comprises an oil gun body, an oil gun body and an oil gun; the outer ring wall of the air circuit valve seat is connected with the oil circuit valve seat, one end of the valve rod is connected with the oil circuit valve core, and the other end of the valve rod is positioned in the inner ring and can seal an air channel of the inner ring through configuration.

The fuel nozzle as described above, wherein the air passage is deflected in direction after passing through the air passage valve.

The fuel nozzle as described above, wherein the diameter of the outer ring of the gas path valve is substantially equal to the diameter of the oil inlet or the difference between the diameters is less than 3 mm.

The fuel gun as described above, further comprising a barrel assembly and a venturi valve, wherein the venturi valve is disposed proximate the barrel assembly and distal from the drive mechanism.

The fuel gun as described above, wherein the venturi valve is disposed in the barrel assembly chamber in the gun body.

The fuel nozzle as described above, wherein the venturi valve includes a venturi valve seat and a venturi valve element, and wherein a portion of the venturi valve seat which is not in contact with the venturi valve element is hollowed out.

The fuel nozzle as described above, further comprising: a vacuum passage communicating the venturi valve with an exterior of the fuel gun configured to replenish air to the venturi valve, wherein the vacuum passage is integral with the barrel of the barrel assembly.

The fuel nozzle as described above, further comprising: a pose device disposed in a portion of the lower vacuum channel of the barrel assembly.

The fuel filler gun as described above, wherein the inner surface of the liquid passage is a machined surface.

This application oil gun simple structure, easily assembly, fluid import diameter is big moreover, can be so that the oil gun has higher velocity of flow.

Drawings

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

FIGS. 1A-1F are schematic diagrams of a fuel gun according to one embodiment of the present application;

FIG. 2 is an exploded view of a fuel gun configuration according to one embodiment of the present application;

3A-3D are schematic views of a valve assembly according to one embodiment of the present application;

FIG. 4 is an exploded view of a valve assembly according to one embodiment of the present application;

FIGS. 5A-5D are schematic views of a drive mechanism according to one embodiment of the present application;

FIG. 6 is an exploded view of a drive mechanism according to one embodiment of the present application;

FIGS. 7A-7D are schematic views of a vacuum cap according to one embodiment of the present application;

FIG. 8 is an exploded view of a vacuum cap according to one embodiment of the present application;

FIGS. 9A-9D are schematic diagrams of a barrel assembly according to one embodiment of the present application; and

fig. 10 is an exploded view of a barrel assembly according to one embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

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

The fuel gun (also called "fuel gun") is connected with the fuel dispenser through a rubber hose. The oil liquid enters the oil gun through the rubber tube, passes through an oil path valve and a Venturi valve in the oil gun, flows out of the gun barrel and is added into an oil tank of the vehicle. The opening and closing of the oil circuit valve can be controlled by a trigger on the oil gun through a driving mechanism. The vacuum cap is used to lock the drive mechanism. In the oil gas recovery function, the vapor of the oil liquid is recovered to the oiling machine through the gas channel and the gas path valve. In current nozzle design, setting up unreasonablely such as oil circuit valve, venturi valve and gas circuit valve causes the frequent transform of the runner of fluid, and the fluid flow environment is complicated, consumes the energy of fluid, causes the nozzle velocity of flow slow scheduling problem.

The application provides a new design's nozzle, further optimizes the runner that fluid passed through, and the energy loss of minimize fluid in the runner for this application nozzle possesses the high velocity of flow, makes the nozzle assembly and maintenance comparatively convenient simultaneously.

The technical solution of the present application is further explained by the following specific embodiments. It should be understood by those skilled in the art that the following descriptions are only provided for facilitating the understanding of the technical solutions of the present application, and should not be used to limit the scope of the present application.

FIGS. 1A-1F are schematic views of a fuel gun according to one embodiment of the present application. FIGS. 1A and 1B are perspective views of a fuel gun in different directions, showing the overall shape thereof; FIG. 1C is a sectional view taken along line A-A in FIG. 1A, and FIGS. 1D-1F are sectional views taken along lines B-B, C-C, and D-D in FIG. 1C, respectively, showing the cross-sectional shape of the fuel gun. FIG. 2 is an exploded view of a fuel gun configuration according to one embodiment of the present application.

As shown, the fuel gun 100 includes a gun body 110 that includes an oil inlet 101 and an oil outlet 102. The oil inlet 101 can be connected to a hose by means of an inlet thread, which in turn can connect the oil gun to the fuel dispenser. The oil of the oiling machine enters the gun body from the oil inlet, and then the oil outlet flows out of the gun body. According to one embodiment of the present application, the gun body 110 may be injection molded. According to one embodiment of the present application, the material of the gun body 110 is a metal or alloy such as aluminum, stainless steel, etc.

As shown, the fuel gun 100 further includes a valve assembly 120 disposed from the oil inlet to the oil outlet of the gun body 110, a drive mechanism 130, a vacuum cap 140, and a barrel assembly 150. The valve assembly 120 is used to allow or prevent oil from passing through the gun body 110 and to allow or block oil vapor from passing through the gun body 110 after recovery. The driving mechanism 130 is connected to the valve assembly 120 to control the opening and closing of the valve assembly 120, so as to control the passage of oil and/or oil vapor. The vacuum cap 140 is used to lock the drive mechanism 130. When the driving mechanism 130 is in the locked state, the driving mechanism 130 is integrated into a usable state. When the driving mechanism 130 is in the unlocked state, the driving mechanism 130 is not available and cannot control the opening and closing of the valve assembly 120. A barrel assembly 150 is provided at the front of the gun body 110, which may be inserted into a vehicle's fuel tank to add oil thereto.

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

In some embodiments, the valve assembly chamber is aligned substantially parallel to the drive mechanism chamber, having substantially the same axis, to ensure that the liquid passages remain substantially in a consistent orientation. Further, the barrel assembly chamber is not substantially coaxial with the valve assembly chamber and the drive mechanism chamber, but is angled. Thus, the oil gun does not become too long to affect use. In some embodiments, the venturi valve is located in the barrel assembly chamber. The venturi valve is closer to the barrel assembly than the drive mechanism. The venturi valve and the drive mechanism are not substantially the same axis.

In some embodiments, the gun body 110 may further include a liquid passage 104 and a gas passage 105 between the valve assembly chamber and the barrel assembly chamber; wherein the oil passage 104 defines a passage for oil to enter the vehicle tank through the gun body 110; gas passage 105 defines a path for oil vapor to be recovered into the fuel dispenser through gun body 110. In some embodiments, the fluid passage 104 protrudes from the portion of the drive mechanism chamber to the exterior of the gun body to facilitate compensation of the oil passage occupied by the drive mechanism chamber so that the oil passage has the same area as the flow passage of oil in the valve assembly, thereby avoiding the formation of an area bottleneck and loss of energy of the oil.

In some embodiments, the gun body 110 may also include an oil pressure passage 106 between the valve assembly chamber and the vacuum cap chamber and an air pressure passage 107 between the vacuum cap chamber and the barrel assembly chamber. Oil enters the vacuum cap 140 through the oil passage 106, and the oil pressure provided by the oil pushes the vacuum cap 140 to lock the driving mechanism 130 into a usable state. The pneumatic channel 107 is connected to the vacuum cap cavity at one end and to the venturi valve at the other end. When the venturi valve draws air from the vacuum cap 140 through the air pressure channel 107, the vacuum cap may be disengaged from the drive mechanism 130, causing it to enter a non-usable state.

In some embodiments, the fuel gun 100 further includes a trigger 160 located outside the gun body 110, which is coupled to the drive mechanism 130 via a transition piece 161, which can be used to control the drive mechanism. In some embodiments, a transition piece 161 is also located on the outside of the gun body, with one end connected to the trigger 160. One or both sides of the gun body 110 include an opening 103, and the other end of the converter 161 is connected to the driving mechanism 130 through the opening 103. In the locked state, when the trigger 160 is pulled, the driving mechanism 130 may be pushed via the transition piece 161, thereby controlling the valve assembly 120.

In some embodiments, the fuel gun may further include a bail 164 disposed outside of the trigger 160 and removably coupled to the gun body 110 for protecting the hands during refueling. In some embodiments, the trigger guard 164 includes one or more pins 165 that snap into place on the trigger 160 to facilitate securing the trigger 160 during refueling by an operator. Accordingly, the trigger 160 also includes a snap-fit structure provided at the rear of the trigger 160 that can be pushed to insert into the respective pins of the guard 164 to provide different oil flow rates.

In some embodiments, the fuel gun 100 can further include an anti-friction band 166 disposed on the gun body and between the gun body and the transition piece. The friction reducing band 166 may be a felt, rubber, plastic, or other material that is beneficial in reducing friction between the transition piece 161 and the gun body 110 when the trigger 160 is actuated, making it easier and smoother for the operator to actuate the trigger.

The technical solution of the present invention will be further explained by the specific examples of each component. It should be understood by those skilled in the art that the description of these components is not intended to limit the scope of the present invention. Other components with similar functions can also be applied to the device, and become a part of the technical scheme of the invention.

Fig. 3A-3D are schematic views of a valve assembly according to one embodiment of the present application. FIGS. 3A and 3B are perspective views of the valve assembly in different directions, showing its overall shape; FIG. 3C is a side view of the valve assembly showing its side shape; fig. 3D is a cross-sectional schematic view of fig. 3C, showing its cross-sectional shape. Fig. 4 is an exploded view of a valve assembly according to one embodiment of the present application.

Referring to fig. 1D-1F, 3A-3D, and 4, the valve assembly 120 is generally cylindrical in shape, including an oil circuit valve 310 and an air circuit valve 320; the oil valve 310 is disposed on the liquid passage 104 in the gun body 110, and is used for controlling oil to pass through the gun body 110; the gas path valve 320 is disposed on the gas passage 105 of the gun body 110 for controlling oil vapor recovery.

Of course, valve assembly 120 may have other shapes as will be appreciated by those skilled in the art. For example: a conical shape, a Mongolian yurt shape, or the like, or one or both of the oil passage valve 310 and the air passage valve 320 may be a conical shape or a Mongolian yurt shape.

According to an embodiment of the present application, the oil path valve 310 may be integrally connected with the air path valve 320. In some embodiments, the two may be integrally formed as a valve assembly 120 that controls both the passage of liquid and gas. Thus, the opening and closing of the oil valve 310 and the oil valve 320 may be controlled simultaneously. Therefore, although the structures of the oil passage valve 310 and the air passage valve 320 are described below, they do not mean that both are separate structures.

In some embodiments, the gas passage is directionally deflected at valve assembly 120, while the direction of the liquid passage remains substantially unchanged. In some embodiments, further, in the valve assembly 120, the gas passage is located inside the liquid passage, and has a lower influence on the flow velocity of the oil, so that the liquid passage occupies a larger cross-sectional area more easily, which is beneficial to increase the flow velocity of the oil.

In some embodiments, the oil valve 310 includes a valve seat 311 and a spool 312; the valve core 312 is substantially flat, and one end thereof is coupled to the driving mechanism 130. When the valve element 312 abuts the valve seat 311, oil is prohibited from passing through the oil gun. When the drive mechanism 130 pushes the poppet 312 off the valve seat 311, oil is allowed to pass. According to an embodiment of the present application, the oil circuit valve further includes a return spring 313 for returning the spool, i.e. pushing the spool 311 against the valve seat 312.

In some embodiments, the diameter of the fluid passage between the gun body 110 from the oil inlet to the oil circuit valve is substantially equivalent to the diameter of the oil inlet thread. For example, in the case where the inlet thread may be M34 × 1.5, the liquid passage diameter of the oil valve seat when not passing through the spool may be up to Φ 32mm, so that a high flow rate can be supported. In some embodiments, the radius of the oil path spool is about the same as or differs by less than 5mm from the radius of the liquid path prior to passing through the spool, thereby ensuring continuity of the liquid path. In some embodiments, the valve seat 311 is hollowed out to a large extent, and only a small amount of support is retained, so as to increase the area of the oil passage in the oil valve 310 and increase the flow rate of the oil gun.

In some embodiments, the outside of the valve seat 311 near the spool 312 includes a groove 314 at a location corresponding to the location of the oil pressure passage 106 on the gun body. After the oil enters the oil valve and before the valve core is not opened, the oil can enter the groove 314 from the fluid passage in the oil valve 310 through a gap or a reserved passage (not shown) between the oil valve 310 and the gun body 110, and then enter the oil pressure passage 106 to reach the vacuum cap cavity in the gun body 110. In some embodiments, the gap or passage is designed to allow a predetermined flow rate of oil into the vacuum cap chamber or from the vacuum cap chamber back to the valve assembly chamber to prevent excessive changes in vacuum cap chamber oil pressure.

In some embodiments, the valve seat 310 further includes a seal ring 315 and a retaining groove 316, wherein the retaining groove 316 is configured to receive the seal ring 315. The position of the sealing ring 315 can be limited by the limiting groove, and the situation that the sealing effect of the oil gun is influenced by the change of the position of the sealing ring in the installation process is prevented. The limiting groove 316 is disposed outside the groove 314 (on the side away from the valve element 312), and can prevent oil leakage.

In some embodiments, the end of the oil valve 310 away from the oil inlet further includes a diversion cone 317, for example, the diversion cone 317 may be shaped like a yurt, and has a cone shape from large to small along the direction of the oil flow; rather than a taper from small to large. The reason for this configuration is that the guiding cone 317 can guide the oil passing through the valve core 312, and prevent the oil from generating a vortex after passing through the valve core and losing the energy of the oil. The deflector cone 317 may also have other shapes, as will be appreciated by those skilled in the art. For example: multiple stepped stages, etc. In one embodiment, the guide cone 317 may include a protrusion 318 for contacting the drive mechanism 130 to facilitate increasing the distance between the guide cone and the drive mechanism to prevent a collision during assembly. In a further embodiment, the protrusion 318 includes one or more lands 319 disposed on the side of the protrusion 318, which may be used to define the location of the guide cone and also facilitate assembly positioning between the parts. In some embodiments, protrusion 318 is integrally formed with cone 317.

In some embodiments, the air passage valve 320 includes a valve seat 321 and a valve stem 322; the valve seat 321 is annular and includes an outer ring 323 and an inner ring 324. The outer ring 323 is for oil passage and the inner ring 324 is for oil vapor passage. A portion of the valve stem 322 is reduced in diameter and disposed in the valve seat 321 for controlling the passage of oil vapor. One end of the valve rod 322 extends to connect with the valve core 312, which is beneficial for the driving mechanism 130 to open the oil path valve and the air path valve synchronously. The stem 322 and the poppet 312 may be fixedly connected, for example: and (4) connecting by screw threads. The valve stem 322 and the valve core 312 may also be movably connected, such as directly abutting. In some embodiments, the outer ring diameter of the valve seat 321 is the same as or differs by less than 3mm from the diameter of the gun body oil inlet. In some embodiments, the outer ring diameter cross-sectional area of the valve seat 321 is substantially the same as the cross-sectional area of the liquid passage before the oil flow valve passes through the valve element.

In some embodiments, the air passage valve 320 further includes a sealing seat 327 disposed between the valve stem 322 and the valve seat 321. As shown, the seal 327 is secured to the valve seat 321 by a plurality of retaining grooves 328 formed therein. The seal seat 327 is used for isolating the liquid channel and the gas channel of the gas path valve, so as to prevent oil from being mixed with oil vapor, prevent direct friction between the valve rod 322 and the valve seat 321, prolong the service life of the oil gun and facilitate maintenance and replacement. In some embodiments, the portion of the stem 322 connected to the poppet 312 may also be located in the seal seat 327. Further, one or more sealing rings are included between the sealing seat 327 and the valve stem 322, which may seal the oil passage and the air passage. The sealing seat comprises one or more limiting grooves for accommodating the sealing ring.

In one embodiment, the diameter of the valve stem 322 is reduced and beveled to form a corresponding counter-bevel in the seal seat 327, creating a valve structure with a larger contact surface for the air passage valve 320. Of course, the valve stem 322 may also be brought into contact with the seal seat 327 by including a larger diameter valve head. When the valve stem 322 contacts the seal seat 327, oil vapor is inhibited from passing through the air passage. When the valve stem 322 slides out of the seat 327, oil vapor is allowed to pass through the air passage. In some embodiments, the valve stem 322 includes a retaining groove at a corresponding location in the seal housing that can be used to receive a seal ring and can be used to define the position of the seal ring.

In some embodiments, the valve seat 321 includes one or more apertures 325 through the outer ring 323 of the valve seat 321 but not in communication with the outer ring 323, but rather communicating the exterior of the valve seat 321 with the inner ring 324 of the valve seat, which may be used to accommodate the passage of oil vapor. Thereby, the gas passage of the inner ring 323 is deflected in a direction, for example, vertically. The gas has better fluidity and smaller resistance; the arrangement can leave more passages for the liquid channel, so that the oil resistance can be reduced, and the flow speed is higher.

In some embodiments, the valve seat 321 may include a groove 326 adjacent to the plurality of apertures 325, which may connect the plurality of apertures 325 together to form a unitary body. In some embodiments, the valve seat 321 further includes a plurality of sealing rings disposed on both sides of the hole 325 or the groove 326 to seal the passage of the oil vapor and prevent leakage thereof. Further, the valve seat 321 further includes a plurality of limiting grooves for accommodating the sealing rings, which can be used to limit the positions of the sealing rings, so as to prevent the positions of the sealing rings from being changed during the assembly process, thereby affecting the sealing effect of the oil gun.

In one embodiment, the air passage valve 320 further includes a return spring 329 that is fitted over the valve stem 322. In some embodiments, a return spring 329 is located in the return spring 313, with one end disposed on the stem 322, e.g., on a portion where the spool 312 is connected, and the other end disposed on the seal seat 327. The return spring 329 resets the air circuit valve 320 by pushing the valve stem 322, i.e., the valve stem end is pushed into the seal seat. Of course, the return spring 329 may not be included when the valve stem is fixedly attached to the valve core, as will be appreciated by those skilled in the art.

In some embodiments, return spring 313 is disposed on the valve element at one end and on the inner annular wall of the gas circuit valve seat at the other end. The positions of the inner ring wall and the sealing seat are not moved. When the oil gun trigger 160 is pulled to push the drive mechanism 130 to open the oil path valve 310 and the air path valve 320, the return springs 313 and 329 are compressed. When the pushing force of the driving mechanism 130 is removed, the return springs 313 and 329 can restore the valve core and the valve rod respectively. Therefore, opening the oil passage valve and the air passage valve requires overcoming the forces of the return springs 313 and 329 and the pressure of the oil; when the oil passage valve and the air passage valve are closed, the urging forces of the return springs 313 and 329 press the oil passage valve and the air passage valve simultaneously. The oil gun has the advantages of compact structure, convenient assembly, good sealing effect of the oil line valve and the air line valve, and greatly prolonged service life.

In some embodiments, the valve assembly 120 may further include a positioning ring 330 disposed outside the air passage valve on a side thereof remote from the air passage valve for defining the positions of the air passage valve and the air passage valve. During installation, the positioning ring 330 is screwed to push and install the oil valve 310 and the air valve 320 into the valve assembly cavity of the gun body 110, and the positioning ring can further fix the positions of the oil valve 310 and the air valve 320 to prevent the oil valve from moving to the oil inlet of the gun body 110. In one embodiment, retaining ring 330 may include threads that engage threads of gun body 110 to facilitate installation and positioning of valve assembly 120.

During refueling, oil enters the oil valve 310 from the outer ring of the air valve 320 and then enters the vehicle's oil tank. Along with the problems of corrosion of internal pipelines of the oiling machine and the like, the oil liquid coming out of the oiling machine is likely to be doped with impurities. In some embodiments, the valve assembly further includes a filter screen 340 disposed between the retaining ring 330 and the air passage valve 320 for filtering oil exiting the fuel dispenser to prevent contaminants from entering the components of the fuel gun. For example, the filter 340 is annular and has a shape corresponding to the shape of the cross section of the valve seat of the air passage valve, so that impurities in the oil can be effectively filtered. Of course, the filter screen may have other shapes as will be appreciated by those skilled in the art.

In the embodiments of the present invention, the valve assembly 120 is generally cylindrical, and the cross-sectional area of the oil passage in the valve assembly is not changed or is not greatly changed, so that the energy loss of the oil is not caused, and the flow velocity of the oil gun is increased; and the valve seat of the oil path valve is hollowed as far as possible, so that the area of the section of the oil path is further increased, and the flow rate of the oil gun is improved. Further, the air passage valve and the oil passage valve can be connected into a whole. The driving mechanism 130 pushes the valve core 312 of the oil path valve 310 to open the air path valve 320 at the same time, so that the two can act in a unified manner, and the oil vapor can be recovered while the oil path is opened.

Fig. 5A-5D are schematic views of a drive mechanism according to one embodiment of the present application. FIGS. 5A and 5B are perspective views of the driving mechanism in different directions, respectively, showing the overall shape thereof; FIG. 5C is a side view of the drive mechanism showing its side shape; fig. 5D is a sectional view of the drive mechanism, showing its sectional shape. Fig. 6 is an exploded view of a drive mechanism according to one embodiment of the present application.

Referring to fig. 1D-1F, 5A-5D, and 6, the drive mechanism 130 includes a fixed hub 510, a drive hub 520, and a drive shaft 530; wherein the drive shaft 530 is adapted to fit within the drive bushing 520; the end of the driving hub 520 contacting the driving shaft 530 is adapted to be fitted into the fixed hub 510; accordingly, the other end of the driving shaft 530 is also adapted to be fitted into the fixed hub 510, forming a stacked fitting structure. In some embodiments, the fixed sleeve 510 is fixed in the drive mechanism cavity of the gun body 110, and the drive sleeve 520 and the drive shaft 530 are each capable of reciprocating in the axial direction of the fixed sleeve.

According to an embodiment of the present invention, the fixing sleeve 510 is generally cylindrical, and has a hollow interior, and the first end includes an opening 511 for receiving the driving sleeve 520 therethrough, so that the driving sleeve extends into the fixing sleeve 510. In some embodiments, the second end of the fixing sleeve 510 is tapered to facilitate the fixing sleeve to be assembled into the driving mechanism cavity of the gun body 110 without affecting the air pressure passage of the gun body 110, so that the air pressure passage is straight, thereby avoiding forming a complicated air pressure passage and increasing the difficulty in casting the gun body 110.

In some embodiments, the fixed collar 510 further includes openings 512 and 513 disposed on opposite sides of the fixed collar 510 and extending from the second end of the fixed collar 510 toward the middle of the fixed collar 510, corresponding to the openings 103 in the gun body 110. As understood by those skilled in the art, the direction in which the drive mechanism is disposed in fig. 5C is taken as a reference direction. The conversion member 161 may be coupled to the driving shaft 530 through the opening 512 and the opening 513. Specifically, the method comprises the following steps: the shifting member 161 may include a connecting member 162 and a driving member 163, wherein the connecting member 162 may be a U-shaped connecting member having an open end disposed on the gun body and a U-shaped bottom end connected to the trigger 160, and the driving member 163 may be a pin, a rod, a stick, a nail, etc. which may be inserted through the opening 103 of the gun body into the openings 512 and 513 of the fixing boss 510 and then connected to the connecting member 162 through the gun body 110. When the trigger 160 is pulled, the connecting member 162 rotates circumferentially relative to the fixed point of the gun body 110, and the driving member 163 moves linearly along the opening 103, the openings 512, 513, and thus the driving shaft 520 is driven to move on the axis of the fixed sleeve 510.

In some embodiments, the fixed hub 510 further includes a recess 514 for defining the location of the fixed hub. Referring to fig. 1D, the position of the fixed sleeve relative to the gun body can be limited or fixed by a limiting member 501. For example, the limiting member 501 may be a limiting pin, a limiting nail, a limiting rod, a limiting block, a screw, or the like.

In some embodiments, the fixed collar 510 may further include a slot 515 disposed at a bottom portion of the fixed collar 510 for receiving the stop rod 502 therethrough. Referring to fig. 5D, the fixing shaft sleeve 510, the driving shaft sleeve 520 and the driving shaft 530 may be limited by the limiting rod 502, so as to prevent the three from rotating axially and change the relative positions of the three. When the drive shaft 530 or the drive sleeve 520 moves within the fixed sleeve, the stop lever 502 also moves within the slot 515. The stop collar 502, or a portion thereof, may include threads that may be threadably coupled to the drive shaft. In some embodiments, the stop lever 502 may be fixedly connected to the drive shaft 530 in other manners. For example: clamping, bonding, interference assembly or transition assembly and the like.

In some embodiments, the fixed bushing 510 may further include an opening 516 disposed above the fixed bushing 510 and between the recess 514 and the first end of the fixed bushing 510 for receiving a catch pin socket of a vacuum cap.

In some embodiments, the fixed bushing 510 may further include a first seal 517 and a second seal 518; the first sealing ring 517 and the second sealing ring 518 are located at the first end of the fixed shaft sleeve 510, and the first sealing ring 517 is used for sealing the fixed shaft sleeve 510 and the gun body 110, so as to prevent oil from entering a driving mechanism cavity of the gun body 110 and further leaking out of the oil gun through the opening 103; the second seal 518 is used to seal the fixed sleeve 510 and the driving sleeve 520, preventing oil from entering the inside of the fixed sleeve and further leaking out of the oil gun through the opening in the fixed sleeve. According to an embodiment of the present application, the fixed sleeve 510 may further include a limiting groove 519 for receiving the first sealing ring 517 and/or the second sealing ring 518, so as to limit the position of the sealing ring, and prevent the position of the sealing ring from being changed during the assembly process, which may affect the sealing effect of the oil gun.

According to one embodiment of the present invention, the driving sleeve 520 is generally cylindrical in shape as a whole, and has a hollow interior for receiving the driving shaft 530 therethrough so as to extend into the driving sleeve. According to one embodiment of the present application, the drive sleeve 520 may include a recess 521 at a first end of the drive sleeve. The recess 521 corresponds to the positions of the openings 512 and 513 of the fixed bushing 510 for receiving the driving member 163 of the converting member 161. In some embodiments, the drive hub 520 may not include the recess 521, and the first end of the drive hub 520 does not extend beyond the opening 512 or the opening 513 of the fixed hub 510.

According to an embodiment of the present application, the second end of the driving collar 520 includes a protrusion 522, which is in contact with the guide cone 317 (e.g., in contact with the protrusion 318 of the guide cone 317) for pushing the guide cone 317 or the valve core 312, which facilitates increasing the distance between the driving mechanism and the guide cone for the driving mechanism to push the guide cone. In some embodiments, the protrusion 522 may further include one or more lands 523 thereon for defining the position of the drive sleeve and preventing rotation thereof to facilitate positioning of the gun parts relative to one another. According to one embodiment of the present application, the protrusion 522 is integrally formed with the drive sleeve 520.

In some embodiments, the drive collar 520 may further include an opening 524 disposed above the drive collar 520 near a middle portion of the drive collar 520 for receiving a catch pin of a vacuum cap catch pin holder. Accordingly, the corresponding location of the drive shaft also includes an opening 531, which is the same size as the opening 524. When the engagement pins of the vacuum cap engagement pin boss are dropped into the openings 524 and 531, the drive shaft is integrated with the drive shaft sleeve (i.e., the oil gun is "engaged"). At this point, the drive mechanism is in the enabled state, and the drive sleeve 520 follows the drive shaft 530 as the drive member 163 pushes the drive shaft 530. When the vacuum cap shift pin of the shift pin socket exits the opening 524 and/or the opening 531, the drive shaft is disengaged from the drive bushing. At this time, the driving mechanism is in a non-usable state, and when the driving member 163 pushes the driving shaft 530 to move, the driving shaft 530 relatively moves in the driving shaft sleeve 520, and cannot push the driving shaft sleeve 520 to move.

According to an embodiment of the present invention, the driving shaft 530 is integrally formed in a cylindrical shape. Near the end in contact with the drive sleeve 520, a dry test hole 532 is included at a location corresponding to the recess 521 of the drive sleeve 520 for locking the drive shaft 530 and the drive sleeve 520 together from outside the gun body to facilitate dry testing of the gun without oil (i.e., simulated refueling testing) prior to use. Specifically, a positioning element (e.g., a pin, nail, stick, rod, etc.) is inserted through the opening 103 of the gun body 110 into the opening 512 of the fixed sleeve, through the recess 521 of the driving sleeve 520, through the dry-side hole 532, and out of the gun body through the opening 513 of the fixed sleeve 510. At this time, the driving member 163 pushes the driving shaft 530 to move along the axial direction of the fixed shaft sleeve 510, the driving shaft 530 drives the positioning member to move synchronously, and the positioning member pushes the recess 521 of the driving shaft sleeve 520, thereby pushing the driving shaft sleeve 520 to move. Thus, when the shift pin, which does not require a vacuum cap shift pin receptacle, falls into the openings 531 and 524 of the drive shaft and drive bushing, the drive shaft 530 can be locked with the drive bushing 520, leaving the drive mechanism in a usable state, opening the valve assembly, and allowing dry testing of the gun.

In some embodiments, the drive mechanism 130 may also include a spring 540 between the drive shaft 530 and the drive collar 520, which may be used to reset the drive shaft, as well as to dampen movement between the drive collar and the drive shaft. For example: when the vacuum cap engaging portion engaging pin does not enter the opening 524 and the opening 531, the trigger switch 161 is pulled to push the drive shaft in motion, but the drive sleeve does not move with the drive shaft, and the drive shaft can only compress the spring 540. Valve assembly 120 does not open. After releasing the trigger, the spring 540 will return the drive shaft to its original position.

This application actuating mechanism is disconnect-type actuating mechanism, needs to lock it through special "gear engaging" locking mechanical system, makes it form an overall structure, pulls the trigger, just can make actuating mechanism promote the valve module. The separated driving mechanism limits the relative circumferential position of each part through the same limiting rod, so that the positions of all parts of the driving mechanism are accurate, and the assembly is convenient.

Fig. 7A-7D are schematic views of a vacuum cap according to one embodiment of the present application. FIGS. 7A and 7B are perspective views of the vacuum cap in different directions, respectively, showing the overall shape thereof; FIG. 7C is a side view of the vacuum cap showing its side shape; fig. 7D is a cross-sectional view of the vacuum cap, showing its cross-sectional shape. FIG. 8 is an exploded view of a vacuum cap according to one embodiment of the present application. The vacuum cap is mainly used for pre-engaging the driving mechanism (namely locking the driving mechanism) when oiling, so that the driving mechanism forms a whole and is in a usable state. When the oil addition is completed, the drive mechanism is taken out of gear (even if the drive mechanism is in a non-locked state).

Referring to fig. 1D-1F, 7A-7D, and 8, the vacuum cap 140 includes a cap 710 and a base 720. The cap 710 has a hollow cylindrical shape, and is disposed on the base 720 to form an inner space of the vacuum cap. The base 720 is secured in the vacuum cap cavity and provides a foundation for the rest of the vacuum cap 140.

In some embodiments, the outside or a portion of the outside of the cap 710 includes threads 714 that can couple the cap 710 into the vacuum cap cavity of the gun body 110. Accordingly, threads are present in the vacuum cap chamber of the gun body that can engage it. The cap 710 simultaneously compresses the base 720 therebelow, thereby achieving a fixation between the two and the vacuum cap cavity. Of course, as one skilled in the art will appreciate, the connection by a threaded connection is only one embodiment in the art, and other embodiments known in the art may be applied to the present disclosure. For example: bonding, welding, transition fit, and the like. In one embodiment, the top and/or bottom of the cap 710 also includes cutouts 715, which facilitates reducing the weight of the cap and the cost of the oil gun.

In some embodiments, the base 720 includes one or more stops 721 spaced about the circumference of the base 720 and adjacent to one side of the cap 710 to define the position of the cap 710 such that a space exists therebetween. The location of the gap between them defines the pneumatic channel 107 of the gun body 110. In some cases, the air pressure channel 107 may draw air between the cap 710 and the base 720. In other embodiments, the limiting block 721 can be disposed at other positions of the base 720.

In some embodiments, the side of the cap 710 may include one or more through holes 711 that communicate between the interior and exterior of the cap 710 and become part of the oil pressure passage 106 on the gun body 110, facilitating the entry of oil through the oil pressure passage 106 into the interior space of the vacuum cap.

In some embodiments, the cap 710 may further include a plurality of sealing rings 712 disposed between the cap 710 and the gun body 110 and located at the upper and lower sides of the through hole 711, so as to prevent oil from entering the vacuum cap cavity from the oil pressure passage 106 and leaking out of the oil gun, or further flowing into the driving mechanism cavity and leaking out of the oil gun. The direction in which the vacuum cap is disposed in fig. 7C is taken as a reference direction. In some embodiments, the cap 710 may further include a plurality of retaining grooves 713 for receiving the sealing ring 712 to retain the sealing ring, so as to prevent the sealing ring from moving during installation and affecting the sealing effect of the oil gun.

In some embodiments, the vacuum cap 140 may further include a piston 730 disposed within the cap 710 to move up and down within the cap 710. Oil can enter between the cap 710 and the piston 730 from the oil pressure passage 106 through the through hole 711 in the cap. When oil pressure exists, the piston 730 is pushed by oil to move downwards; when the oil pressure is removed, the piston 730 moves upward with the oil in the cap. The cap 710 and the piston 730 define therebetween a portion of oil in the vacuum cap. In some embodiments, the piston 730 further includes one or more sealing rings 731 disposed around the circumference of the piston and in contact with the sidewall of the cap to seal between the piston and the cap and prevent oil from leaking beneath the piston. The piston may also include a retaining groove 732 for limiting the position of the sealing ring to prevent the position of the sealing ring from changing as the piston moves.

According to one embodiment of the present application, the piston 730 includes one or more depressions 733 formed in a circular ring shape. Accordingly, the portion of the cap in contact therewith includes one or more protrusions 716 shaped similarly to the depressions 733, which cooperate to define a path for oil therebetween. One or more of the depressions 733 and the protrusions 716 may increase a contact area with the oil, and may buffer a change in oil pressure. When the oil pressure is changed drastically, the flow rate of the oil is not changed very drastically, so that the movement speed of the piston 730 is changed more smoothly.

In some embodiments, the vacuum cap may further include a self-sealing spring 701 disposed between the piston 730 and the base 720 for restoring the position of the piston 730. Specifically, when the pressure of the oil decreases, the self-sealing spring 701 pushes the piston 730 back to the initial position. In some embodiments, the vacuum cap may further include a spring seat 702 disposed between the piston 730 and the self-sealing spring 701.

In some embodiments, the vacuum cap may further include a membrane 740, similar in shape and size to the base, disposed between the base and the step of the gun body vacuum cap cavity, which may serve to isolate the air above and below the base. According to one embodiment of the present application, the membrane 740 is made of a flexible or partially flexible material that changes state when subjected to an applied force. For example: can be rubber, silica gel, plastic, etc. The diaphragm 740 and the piston 730 are located on either side of the base 720, respectively, and define the gas portion of the vacuum cap. The gas passages in the pedestal 720 communicate with the gas portion.

In some embodiments, the vacuum cap may further include a jump-gun spring 703 disposed between the spring seat 702 and the diaphragm 740. According to one embodiment of the present application, the membrane 740 includes one or more spacers 741 disposed on both sides of the membrane and operable to clamp the membrane 740. The gasket on the upper side is in contact with one end of the jump gun spring 703, and is used for bearing the acting force of the spring, so that the stress balance of the diaphragm is facilitated, and the diaphragm is prevented from being damaged by the spring.

In some embodiments, the vacuum cap may further include a gear pin seat 750 disposed below the diaphragm to follow up and down movement of the diaphragm. A catch pin 752 is arranged in the catch pin receptacle 750, which can move linearly in the catch pin receptacle. In some embodiments, tracks 753 and 754 are further included in the catch boss. The catch pin 752 can move along the tracks 753 and 754 to ensure positional accuracy of the movement. As previously described, the gear pin receptacles 750 are aligned with the openings 516 of the fixed hub 510. When the shift pin receptacle 750 is dropped into the fixed bushing opening 516, the shift pin can be dropped into the drive shaft opening 531 and the drive bushing opening 524, integrating the drive shaft with the drive bushing.

In some embodiments, the vacuum cap may further include a connector 704 having one end connected to the gear pin receptacle 750 and another end connected to the diaphragm. In some embodiments, the end of the connecting member 704 connected to the diaphragm may also extend through the jump gun spring into the spring seat, and connect to the spring seat, which may help to strengthen the connection with the shift pin seat and guide its movement.

The working process of the vacuum cap is roughly as follows: for the oil part, when oil enters the vacuum cap, the piston is pushed downwards by the oil pressure, and then the spring seat is pushed, and the self-sealing spring and the gun-jumping spring are compressed; the gun jumping spring can continuously push the diaphragm to move downwards, so that the gear engaging pin of the gear engaging pin seat can fall into the driving mechanism, and the driving mechanism is locked; when oil leaves the vacuum cap, the self-sealing spring pushes the spring seat upwards without the pressure of the oil, so that the piston is pushed upwards, the diaphragm can be lifted up, the gear-engaging pin seat is driven to move upwards, the gear-engaging pin is separated from the driving mechanism, and the state of the driving mechanism is changed into a non-locking state; for the gas part, when gas between the piston and the diaphragm is extracted, the diaphragm moves upwards, the gun jump spring is compressed, the diaphragm is lifted up, the gear engaging pin seat is driven to move upwards, the gear engaging pin is separated from the driving mechanism, and the state of the driving mechanism is changed into a non-locking state.

Fig. 9A-9D are schematic diagrams of a barrel assembly according to one embodiment of the present application. Fig. 9A and 9B are perspective views of the barrel assembly in different directions, respectively, showing the overall shape thereof; fig. 9C is a side view of the barrel assembly showing its side shape; fig. 9D is a cross-sectional view of the barrel assembly showing its cross-sectional shape. Fig. 10 is an exploded view of a barrel assembly according to one embodiment of the present application.

Referring to fig. 1D-1F, 9A-9D, and 10, barrel assembly 150 includes a venturi valve 910, a barrel 920, and a gas tube 930. Where venturi valve 910 is disposed at one end of barrel 920, the other end of barrel 920 may be inserted into the fuel tank of the vehicle. The air pipe 930 is sleeved outside the gun pipe 920 and used for recovering oil vapor. The air tube 920 is connected to the air passage at one end and may also extend into the vehicle's tank at the other end and be slightly open to the outside for recovery of oil vapors.

In some embodiments, air tube 930 is secured to barrel 920 or outside venturi valve 910. For example, air pipe 930 is fixed to venturi valve 910 by a threaded connection. In some embodiments, the trachea may also be connected in other ways, such as: welded, snapped, transition fit, etc., to barrel 920 or venturi valve 910.

In some embodiments, venturi valve 910 includes a valve seat 911 and a valve plug 912, wherein the valve seat is connected to the fluid passage of gun body 110 at one end and to the barrel at the other end. The spool 912 can act on the valve seat 911 to block the passage of oil. In some embodiments, the part of the valve seat 911 not in contact with the valve plug 912 is provided with a hollow part to increase the cross-sectional area of oil passage in the venturi valve, so that the liquid passages of the liquid in the oil gun are as consistent as possible, which is beneficial to reducing the energy loss of the oil and increasing the flow rate of the oil gun.

In some embodiments, the valve seat 911 is a split valve seat, i.e., the valve seat comprises a plurality of spliced portions. For example: the valve core is in contact with one part and is not in contact with the other part, and the valve core are connected into a whole through threads. Such an arrangement facilitates assembly of the venturi valve, as well as facilitating maintenance and replacement of the fitting.

According to one embodiment of the present application, the contact surface of the spool 912 and the valve seat 911 is a slope. When oil presses the valve core to leave the valve seat, the oil passes through the valve core 912 to generate a venturi effect, and vacuum is formed. In some embodiments, the valve seat 911 includes one or more vacuum holes 913 communicating the contact between the valve seat 911 and the valve plug 912 and the outside of the valve seat for supplying air to compensate for the vacuum created by the venturi effect of the venturi valve and maintain the balance of air pressure.

In some embodiments, there are two channels for external air supply to the venturi valve: one is fed from the vacuum cap cavity via the pneumatic channel 107. The vacuum hole 913 corresponds to the location of the pneumatic channel 107 on the gun body 110, which may be connected to the vacuum cap cavity by the pneumatic channel 107. The other is fed via a vacuum channel 108. The vacuum passage 108 extends along the barrel 920 and has one end communicating with the vacuum hole 913 in the valve seat 911 and the other end communicating with the outside along the barrel 920. In some embodiments, vacuum channel 108 is disposed on barrel 920 and is integrally formed with barrel 920.

In some embodiments, referring to fig. 1E, the oil gun 100 further may further include a pose device 170 disposed below the barrel assembly and located in the vacuum channel 108 of the gun body 110. The attitude device 170 may follow the oil gun at different elevations to clear or block the vacuum path. For example, the attitude device 170 includes a steel ball 171 and a plug 172. Wherein the steel ball 171 may reciprocate in a partial vacuum path (e.g., on both sides of the gun body vacuum path at the connection with the gun barrel). The cross-sectional area of the vacuum passage through which the steel ball 171 moves is larger than the cross-sectional area of the vacuum passage in the rest of the gun body, preventing the steel ball from moving to other positions. The plug 172 is disposed at an end of the vacuum channel for sealing the vacuum channel. When the steel ball 171 moves to the vicinity of the plug 172, the vacuum channel of the gun barrel is arranged above the steel ball 171 and communicated with the vacuum channel on the gun body; when the ball moves away from the plug, the vacuum passage of the barrel is below ball 171 and ball 171 will block the vacuum passage. The posture device is arranged on the horizontal line of the gun body. When raising the barrel and being higher than the water flat line, the steel ball can block vacuum passageway, when holding down the barrel and being less than the water flat line, the steel ball can switch on vacuum passageway.

In some embodiments, a plurality of sealing rings 914 are further included between the valve seat 911 and the gun body 110, and are disposed between the valve seat 911 and the gun body 110 and located on both sides of the hollow portion of the valve seat and both sides of the vacuum hole, so as to prevent oil from leaking out of the gun body or the vacuum hole from being supplemented with air from other positions. The valve seat 911 includes a plurality of retaining grooves 915 for receiving the sealing rings 914 and retaining the sealing rings to prevent the positions of the sealing rings from moving during installation.

Further, the barrel 920 is a bent round tube, which may include a vacuum channel 921, the length of the vacuum channel 921 is the same as the length of the barrel, is disposed at the bottom inside the barrel (with the direction of the barrel disposed in fig. 1E as a reference direction), and has one end communicating with the vacuum channel 108 of the gun body 110. In some embodiments, barrel assembly 150 includes a connector 940, which may be used to connect barrel 920 with air tube 930. For example, connector 940 is disposed at the bottom of the barrel and air tube and extends through the air tube and the vacuum channel of the barrel. In some embodiments, the coupling 940 includes a through hole 941 that can couple the barrel vacuum port 921 to the vacuum port 108 of the gun body 110. For example, the connector 940 may be a screw including a through hole.

According to an embodiment of the present application, the connecting member 940 includes a plurality of sealing rings 901 at two sides, between the barrel and the air tube, and between the air tube and the barrel, and the air tube includes a plurality of limiting grooves 931, which are not described herein.

In some embodiments, the gas tube 930, which is connected to the venturi valve 910 at one end and flares at the other end, may be used to collect oil vapors from the gun and return the oil vapors to the fuel dispenser through the gas passage of the gun body. For example, the air tube includes an opening 932 disposed below the air tube 930 and corresponding to the position of the air passage of the gun body 110. In some embodiments, the air tube 932 is a split tube, i.e., the air tube is made from multiple sections that are joined together. For example: collect the gaseous part of oil tank, be partly with the rifle body junction, the two can link into an integrated entity through a plurality of screws, is favorable to the assembly of barrel subassembly, is convenient for change the maintenance.

Further, the barrel assembly 150 may further include a gas skirt 950 that fits over the exterior of the gas tube and fits over the oil fill port of the oil tank to prevent oil vapor from escaping into the air and oil from splashing out of the oil tank. According to one embodiment of the present application, the gas skirt 950 is provided with a plurality of corrugations to facilitate buffering the force of the oil gun extending into the oil tank. According to one embodiment of the present application, the material of the gas collection hoods 950 is a flexible or partially flexible material. For example: rubber, silicone, plastic, etc.

The foregoing details describe the various components of the oil gun of the present application. As will be appreciated by those skilled in the art, there are only two ways of refueling available, namely, rate-rated refueling and top-up refueling. The operation of the above-mentioned components of the oil gun will be described in two ways.

In one case, during a rated load, the fuel dispenser supplies oil through the hose to the valve assembly of the gun after the amount of charge has been input to the dispenser. Because the valve core of the oil path valve is not opened, oil cannot flow into the liquid channel of the gun body but flows into the vacuum cap from the oil pressure channel of the gun body, the piston is pushed to move towards the driving mechanism, and then the hanging pin can be hung in the driving mechanism. At this time, if the trigger is pulled, the driving sleeve moves toward the valve assembly along with the driving shaft, and the valve core of the oil path valve can be opened. Further, the oil can push the valve core of the venturi valve along with the liquid channel of the gun body to flow into the venturi valve and then enter the gun barrel to flow into the oil tank after flowing through the venturi valve. When the preset limit is added or is added quickly, the oiling machine stops oil outlet, or the oil outlet amount is reduced, and the oil pressure in the rubber hose is reduced. The restoring force of a self-sealing spring in the vacuum cap is larger than the pressure of oil liquid, and the piston can be pushed to move towards the direction far away from the driving mechanism, so that the gear engaging pin is separated from the driving mechanism. The valve core of the oil valve is pushed by the return spring to return to the position of closing the oil valve. The oil can not pass through the oil circuit valve and stops oiling. Thereby, rated refueling is achieved.

In some embodiments, the contact area with oil is increased by adding a protrusion or a recess between the cap body of the vacuum cap and the piston. When the oil hydraulic pressure is reduced, due to the friction force between oil liquid, the situation that the gear engaging pin is quickly separated from the driving mechanism due to the fact that the oil hydraulic pressure changes too fast is prevented, and therefore the valve core of the oil path valve is pushed to reset by the reset spring, and the oil gun is enabled to jump (namely the oil gun stops oil discharging when the preset amount is not added). In a further embodiment, the oil in the oil passage valve enters the oil pressure passage through a clearance between the oil passage valve and the gun body. The clearance between the two is small, so that the friction force between the two and the oil liquid is increased, and the phenomenon that the gun jumps due to too fast pressure change is prevented.

In another case, refueling is stopped when the tank is full. After the oiling machine provides fluid to the valve module of nozzle through the rubber tube, because the case of oil way valve is not opened, fluid can not flow in the fluid passage of rifle body, consequently can flow into the vacuum cap by the oil pressure passageway of rifle body, promote the piston to the direction motion of actuating mechanism, and then can hang the catch pin in actuating mechanism, the trigger is pulled, the drive axle sleeve can move to the valve module along with the drive shaft together, and then can open the case of oil way valve, fluid can flow to venturi valve department along with the fluid passage of rifle body, promote venturi valve's case, flow through venturi valve and get into the barrel and flow into in the oil tank. The venturi effect is created when the oil passes through the venturi valve which feeds the air in the tank through the vacuum passage of the gun body and the vacuum passage of the gun barrel. When oil is submerged in the vacuum port of the barrel, oil is drawn into the venturi valve. Therefore, the venturi valve cannot supply air from the vacuum channel, and air between the diaphragm and the cap body in the vacuum cap can be sucked out through the gun body air pressure channel. When the venturi valve sucks the air between the cap body and the diaphragm, the diaphragm can be sucked to move in the direction away from the driving mechanism, and then the gear engaging pin can be driven to synchronously act to be separated from the driving mechanism. The valve core of the oil way valve can be pushed by the reset spring to be restored to the position where the oil way valve is closed, and oil can not pass through the oil way valve. Therefore, the refueling of the full fuel tank is stopped.

In some embodiments, the oil gun is simple and straight as much as possible in the design of a channel through which oil flows, the oil enters from an oil inlet of the gun body and flows out from the gun barrel, and the flowing direction is changed into 135-150 degrees, so that the oil has low energy loss in the flowing process, is not easy to generate vortex, and can effectively improve the flow rate of the oil gun.

In some embodiments, the oil gun has the advantages that the inner part of a channel through which oil flows is a machined surface or an injection molding surface, the surface roughness is low, the friction force between the oil and the surface of a runner is reduced, and the flowing speed of the oil gun is increased. Further, the nozzle of this application still provides the biggest cross sectional area that overflows for fluid, under the restraint of standard import screw thread, the valve module is cylindricly, and does not change the area of overflowing of fluid, and the disk seat fretwork of venturi valve and oil circuit valve can further improve the cross sectional area that overflows of fluid, and the part at rifle body installation actuating mechanism, because actuating mechanism has taken partial fluid passageway, consequently, this application rifle body is outside outstanding at actuating mechanism part, thereby the supplementary runner that occupies fluid, make fluid overflow sectional area equal with the valve module part, avoid forming the area of overflowing bottleneck, loss fluid energy. According to an example of the application, the flow rate of the oil gun of the application can reach 44L/min-48L/min under the pressure of 0.6atm, and the flow rate of the oil gun of the prior art is only 18L/min-20L/min under the same pressure. Therefore, under the same condition of pressure, the flow speed of the oil gun is improved by 2.2-2.6 times compared with the flow speed of the traditional oil gun.

The above embodiments are provided only for the purpose of illustration, and are not intended to limit the present invention, and those skilled in the relevant art can make various changes and modifications without departing from the scope of the present invention, and therefore, all equivalent technical solutions should also belong to the scope of the present invention.

Claims (14)

1. A fuel gun, comprising:

a gun body, comprising: the oil inlet, the oil outlet and a liquid channel for oil to pass through between the oil inlet and the oil outlet;

a valve assembly disposed within the gun body configured to allow or prevent oil from passing through the liquid passage; and

the driving mechanism is arranged in the gun body and is configured to control the valve component to be opened or closed;

the valve component comprises an oil circuit valve, the oil circuit valve comprises an oil circuit valve seat and an oil circuit valve core, when the oil circuit valve core is configured to abut against the oil circuit valve seat, oil is forbidden to pass through an oil liquid channel, wherein the radius of the oil circuit valve core is approximately the same as that of a liquid channel in front of the oil circuit valve, or the difference between the radius of the oil circuit valve core and the radius of the liquid channel in front of the oil circuit valve is smaller than.

2. The fuel nozzle as claimed in claim 1, wherein a portion of the oil path valve seat which is not in contact with the oil path valve body is hollowed out.

3. The fuel nozzle of claim 1, further comprising: and the diversion cone is arranged between the oil way valve core and the driving mechanism, and the diameter of the diversion cone is gradually reduced along the oil flowing direction.

4. The fuel nozzle as claimed in claim 1, wherein the nozzle body projects outwardly at a position adjacent to the drive mechanism and is configured to increase a width of the liquid passage in the nozzle body.

5. The fuel gun of claim 1, wherein the gun body interior further comprises a gas passage configured to recycle collected oil vapor to the fuel dispenser; wherein the valve assembly comprises a gas circuit valve configured to allow or block oil vapor from passing through the gas passage; wherein, the oil circuit valve and the gas circuit valve are opened or closed simultaneously.

6. The fuel nozzle of claim 5, wherein the gas circuit valve includes a gas circuit valve seat and a valve stem, the gas circuit valve seat including an inner ring and an outer ring, the inner ring being a gas passage and the outer ring being a liquid passage; the outer ring wall of the air circuit valve seat is connected with the oil circuit valve seat, one end of the valve rod is connected with the oil circuit valve core, and the other end of the valve rod is positioned in the inner ring and can seal an air channel of the inner ring through configuration.

7. The fuel nozzle of claim 6, wherein the air passage is directionally deflected after passing through the air passage valve.

8. The fuel nozzle of claim 6, wherein the diameter of the outer ring of the air passage valve is substantially the same as the diameter of the fuel inlet or differs therefrom by less than 3 mm.

9. The fuel gun of claim 1, further comprising a barrel assembly and a venturi valve, wherein the venturi valve is disposed proximate the barrel assembly and distal from the drive mechanism.

10. The fuel gun of claim 9, wherein the venturi valve is disposed in a barrel assembly cavity in the gun body.

11. The fuel nozzle as claimed in claim 10, wherein the venturi valve includes a venturi valve seat and a venturi valve core, and wherein a portion of the venturi valve seat which is not in contact with the venturi valve core is hollowed out.

12. The fuel nozzle of claim 10, further comprising: a vacuum passage communicating the venturi valve with an exterior of the fuel gun configured to replenish air to the venturi valve, wherein the vacuum passage is integral with the barrel of the barrel assembly.

13. The fuel nozzle of claim 12, further comprising: a pose device disposed below the barrel assembly in a portion of the vacuum channel.

14. The fuel nozzle of claim 1, wherein the inner surface of the fluid passage is a machined surface.

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