CN219620883U - Gun barrel assembly and oil gun - Google Patents

Abstract

The utility model relates to a gun barrel assembly and a fuel gun, wherein the gun barrel assembly comprises a tube body and a venturi valve, the venturi valve is arranged at one end of the tube body, and an oil outlet is arranged at the other end of the tube body; the venturi valve includes: the valve core framework is in a truncated cone shape, and at least part of the outer side surface of the valve core framework is provided with an annular groove; the sealing layer is laid in the annular groove, and the outer surface of the sealing layer is approximately flush with the outer side surface of the valve core framework; the valve seat is of a hollow cylinder structure, the shape of the inner wall of the valve seat is matched with the shape of the valve core framework, when the valve core framework is arranged inside the valve seat, the valve core framework and the valve seat are positioned on the same axis, and the valve core framework can reciprocate inside the valve seat along the axis; when the venturi valve is closed, the valve core framework moves towards the valve seat until the sealing layer contacts with the annular surface of the inner wall. According to the valve core framework of the Venturi valve, the sealing layer is added, and the sealing layer is in direct contact with the annular surface of the inner wall of the valve seat, so that the tightness is improved.

Description

Gun barrel assembly and oil gun

Technical Field

The present utility model relates to the field of fueling equipment, and in particular to a barrel assembly and a fueling gun.

Background

In order to realize automatic jump of the oil gun when the oil gun is filled with oil, a venturi valve is arranged in a liquid channel arranged on the oil gun, vacuum is generated in the flowing process through a venturi effect, and the feedback of the oil gun gear mechanism to the vacuum degree change is realized. When the oil gun is filled, the valve core of the Venturi valve is contacted with the valve seat, so that the liquid channel is closed.

The valve core and the valve seat of the Venturi valve are two mutually-closed workpieces, and the valve core and the valve seat are generally metal workpieces, and the tightness between the valve core and the valve seat is ensured by means of machining precision. However, the sealing effect of metal to the metal surface is relatively poor, can't effectively seal the liquid in the rifle body, and the mode of taking of nozzle also can receive certain restriction, at every turn follow the in-process of nozzle removal from the nozzle, once the barrel mouth will spill the fluid that oozes in the rifle body on ground or car downwards, causes pollution and even leads to danger.

Disclosure of Invention

Aiming at the technical problems in the prior art, the utility model provides a gun barrel assembly, which solves the problem that a valve core and a valve seat are not tightly sealed by improving the valve core in a venturi valve in the gun barrel assembly.

A barrel assembly comprising: the gun barrel assembly comprises a pipe body and a venturi valve, wherein the venturi valve is arranged at one end of the pipe body, and the other end of the pipe body is an oil outlet; the venturi valve includes: the valve core framework is in a truncated cone shape, and at least part of the outer side surface of the valve core framework is provided with an annular groove; the outer surface of the sealing layer is approximately flush with the outer side surface of the valve core framework; the valve seat is of a hollow cylinder structure, the shape of the inner wall of the valve seat is matched with the shape of the valve core framework, when the valve core framework is arranged in the valve seat, the valve core framework and the valve seat are coaxially arranged, and the valve core framework can reciprocate in the valve seat along the axis; when the venturi valve is closed, the valve core framework moves towards the valve seat until the sealing layer contacts with the annular surface of the inner wall.

And the sealing layer is a hollow round platform coating and is coated on the top surface of the valve core framework and the annular groove.

The barrel assembly is characterized in that a plurality of positioning through holes are formed in the top surface of the valve core framework and the annular groove, the sealing layer is coated on the top surface of the valve core framework and in the annular groove, and the inner surface of the sealing layer extends towards the inner part of the valve core framework along the positioning through holes.

According to the gun barrel assembly, the valve core framework is internally provided with the plurality of annular grooves, the plurality of annular grooves are internally provided with the fastening rings which are made of the same material as the sealing layer respectively, and the fastening rings are connected with the inner surface of the sealing layer through the positioning through holes.

The gun barrel assembly comprises a gun barrel assembly, wherein the sealing layer comprises a fluororubber layer and a nitrile rubber layer, and the sealing layer is poured on the valve core framework by adopting an encapsulation process.

The barrel assembly as described above, the sealing layer has a thickness of 0.05mm to 0.2mm.

And an adhesive layer is arranged between the sealing layer and the valve core framework, and the adhesive layer is formed by an adhesive.

The barrel assembly is characterized in that the cross section of the valve core framework is an isosceles trapezoid, two bottom corners of the isosceles trapezoid are respectively vertically cut by two parallel straight lines, and the two parallel straight lines are perpendicular to the bottom surface of the isosceles trapezoid and form an obtuse angle with a waist line.

As with the barrel assembly described above, the gas passages in the valve seat are in communication with the ports when the sealing layer contacts the annulus of the inner wall of the valve seat.

According to another aspect of the present utility model, there is provided a fuel dispenser comprising: the gun body comprises a liquid channel through which oil liquid passes; the gun body is also provided with a valve assembly cavity and a driving mechanism cavity respectively; a valve assembly disposed in the valve assembly chamber for allowing or preventing oil to pass through the liquid passage; the driving mechanism is arranged in the driving mechanism cavity and used for controlling the opening or closing of the valve assembly; also included is a barrel assembly as described above disposed at least partially within the barrel assembly cavity of the gun body for receiving the liquid passageway.

According to the valve core framework of the Venturi valve, the sealing layer is added, the sealing layer is in direct contact with the annular surface of the inner wall of the valve seat, the tightness is improved, and the problem of oil leakage when the muzzle faces downwards is prevented. In order to ensure that the problem of unstable vacuum degree caused by local flow field disorder is not caused, the outer side surface of the valve core framework is approximately flush with the outer surface of the sealing layer as much as possible.

Drawings

FIG. 1 is a schematic cross-sectional view of a barrel assembly according to one embodiment of the present utility model;

FIG. 2 is a schematic view of a partial enlarged construction of the venturi valve of FIG. 1;

FIG. 3 is a schematic view of the exterior structure of a spool frame according to one embodiment of the present utility model;

FIG. 4 is a schematic view of the cross-sectional structure of the A-A direction of FIG. 3;

FIG. 5 is a schematic cross-sectional view of a spool backbone according to another embodiment of the present utility model;

FIG. 6 is a schematic cross-sectional view of a spool backbone without a sealing layer according to another embodiment of the present utility model;

FIG. 7 is a schematic cross-sectional view of a valve core skeleton provided with a sealing layer according to another embodiment of the present utility model; and

FIG. 8 is a schematic cross-sectional view of a fuel dispenser according to one embodiment of the utility model.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

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

The fuel dispenser (also referred to as a "fuel gun") is connected to the fuel dispenser by a hose. The oil enters the oil gun through the rubber tube, flows out through the oil way valve and the gun barrel component in the oil gun, and is added into the oil tank of the vehicle. The opening and closing of the oil passage valve can be controlled by a trigger on the oil gun via a driving mechanism. The vacuum cap may lock the drive mechanism. According to the utility model, the sealing layer is added on the valve core of the venturi valve in the gun barrel assembly, so that the sealing performance of the venturi valve is improved, and the problem of oil leakage of the oil gun after oil filling is finished is prevented.

The technical scheme of the utility model is further described by the specific embodiments. It should be understood by those skilled in the art that the following descriptions are only for convenience in understanding the technical solutions of the present utility model and should not be used to limit the scope of the present utility model.

Fig. 1 is a schematic cross-sectional view of a barrel assembly according to one embodiment of the present utility model. FIG. 2 is a schematic view of a partial enlarged structure of the venturi valve of FIG. 1. As shown in fig. 1 and 2, the barrel assembly 100 includes a tube body 110 and a venturi valve 120, the venturi valve 120 is provided at one end of the tube body 110, and the other end of the tube body 110 is an oil outlet. The venturi valve 120 is used to perform the function of automatic skip-gun when oil is filled.

As shown in fig. 2 in combination with fig. 1, the venturi valve 120 includes a valve core skeleton 121 and a valve seat 122, the valve core skeleton 121 is a truncated cone, the valve seat 122 is a hollow cylinder structure, and the shape of the inner wall of the valve seat 122 is adapted to the shape of the valve core skeleton 121.

When the spool frame 121 is assembled inside the valve seat 122, the spool frame 121 is disposed coaxially with the valve seat 122, and the spool frame 121 is capable of reciprocating along an axis inside the valve seat 122. The valve core skeleton 121 is contacted with the valve seat 122 by the spring force of the spring, and the venturi valve 120 is closed. When oil flows in at one end of the valve seat 122, the oil rushes the valve core skeleton 121 away from the valve seat, so that the venturi valve 120 is opened, and oiling is started. The valve core skeleton 121 and the valve seat 122 are generally made of metal, and when the valve core skeleton and the valve seat are in direct contact, even if the machining precision is very high, a small amount of oil flows out of the cavity of the oil gun. Therefore, according to the utility model, a sealing layer is added on the valve core framework 121, the sealing layer can be a rubber layer, and when the venturi valve is closed, the sealing layer is in direct contact with the valve seat 122, so that the contact area is increased, the problem of oil leakage is solved, and the use satisfaction of users is improved.

Referring to fig. 2, gas passages 123 are symmetrically provided on the valve seat, and when the sealing layer contacts the annulus of the inner wall of the valve seat, the gas passages 123 are in gas communication with the oil outlet. The gas channel 123 is in gas communication with the oil outlet, so that the gas pressure of the gas channel 123 is ensured to change when oil is filled, and the automatic jump gun function of the oil gun is further realized.

FIG. 3 is a schematic view of the external structure of a spool frame according to an embodiment of the present utility model. Fig. 4 is a schematic view of A-A cross-sectional structure of fig. 3. As shown in fig. 3 and 4, the valve core skeleton 121 is in a truncated cone shape, and at least part of the outer side surface of the valve core skeleton is provided with an annular groove. Wherein, the width of the annular groove is smaller than or equal to the width of the outer side surface of the valve core skeleton 121. The sealing layer 124 is laid in the annular groove, and the outer surface of the sealing layer 124 is approximately flush with the outer side surface of the spool frame 121. During operation of the valve element, liquid is required to flow along the outer surface of the valve element to create a vacuum. Therefore, the surface of the valve core needs to be kept as smooth as possible so as not to obstruct the flow of liquid, cause the disturbance of the local flow field to cause unstable vacuum degree, and further cause the failure of the gun closing action of the oil gun. When the venturi valve 120 is closed, the valve core skeleton 121 moves towards the valve seat 122 until the sealing layer 124 contacts with the annular surface of the inner wall of the valve seat 122, so that sealing is realized.

Referring to fig. 4, the cross section of the spool frame 124 is an isosceles trapezoid, two base corners 125 of the isosceles trapezoid are vertically cut by two parallel straight lines, respectively, which are perpendicular to the bottom surface of the isosceles trapezoid and form an obtuse angle with the waist line. The outer side surface of the valve core framework 124, which is close to one side of the bottom surface, is provided with a plane, so that the valve core framework 124 is convenient to clamp the valve core framework 124 by an assembly tool in the assembly process, and the assembly efficiency is improved. According to another embodiment of the present utility model, two fitting grooves (not shown) are symmetrically provided on the inner wall of the spool frame 124 to facilitate the fitting.

According to one embodiment of the utility model, the sealing layer 124 comprises a fluororubber layer and a nitrile rubber layer, and the sealing layer 124 is cast on the valve core skeleton 121 by an encapsulation process. Fluororubber and nitrile rubber are rubber materials with certain tolerance to gasoline. Thus, the use of a fluororubber layer or a nitrile rubber layer can improve the service life of the sealing layer 124. The encapsulation process is to mold rubber on other materials in one step, so that the bonding force between the sealing layer 124 and the valve core skeleton 121 can be increased.

However, when a fluororubber layer or a nitrile rubber layer is used as the sealing layer, the sealing layer swells to a different extent even when immersed in a gasoline environment for a long period of time. If the restriction is not added, the sealing layer may expand during the gasoline scouring process, so that the size becomes larger by more than 7%, the bonding force between the sealing layer 124 and the spool frame 121 may be reduced, and finally, the problem of detachment of the sealing layer 124 and the spool frame 121 may occur. Therefore, how to reliably fix the sealing layer 124 on the surface of the spool framework 124 is one of the problems to be solved by the present utility model.

Fig. 5 is a schematic cross-sectional view of a valve core skeleton according to another embodiment of the present utility model. As shown in fig. 5, the sealing layer 502 is a hollow truncated cone coating, which is coated on the top surface of the spool frame 501 and the annular groove. The top surface of the sealing layer 502 conforms to the shape and size of the top surface of the spool frame 501. When the sealing layer 502 is wrapped on the spool frame 501, the outer side surface of the sealing layer 502 is substantially flush with the outer side surface of the spool frame 501. When the sealing layer 502 is coated on the top surface of the valve core framework 501 and the annular groove, the contact area with the valve core framework 501 is increased, and the stability of the sealing layer 502 is improved. In addition, when the fuel gun is refueled, the fuel comes from the direction opposite to the valve core skeleton 501, the whole sealing layer 502 is impacted by the liquid, and the risk that the sealing layer 502 is peeled off from the surface of the valve core skeleton 501 by the liquid is reduced.

Fig. 6 is a schematic cross-sectional view of a valve core skeleton without a sealing layer according to another embodiment of the present utility model. Fig. 7 is a schematic cross-sectional view of a valve core skeleton provided with a sealing layer according to another embodiment of the present utility model. As shown in fig. 6 and 7, a plurality of positioning through holes 602 are provided on the top surface of the spool frame 601 and the annular groove, and a sealing layer 604 wrapped in the spool frame top surface and the annular groove extends along the positioning through holes 602 toward the inside of the spool frame 601. Wherein, the positioning through holes 602 can be uniformly distributed on the top surface of the valve core framework 601 and in the annular groove, and the sealing layer 604 extends into the positioning through holes 602, so that the adhesion force of the sealing layer 604 on the valve core framework 601 is increased, and the sealing layer 604 is prevented from falling off.

According to one embodiment of the present utility model, one or more annular grooves 603 are further provided inside the spool frame 601, and a fastening ring 605 made of the same material as the sealing layer 604 is provided in the one or more annular grooves 603, and the fastening ring 605 is connected to the inner surface of the sealing layer 604 through a positioning through hole 602. The annular groove 603 may be disposed inside the top surface of the spool frame 601, and the annular groove 603 may also be disposed inside the side surface, or disposed inside the top surface and inside the side surface of the spool frame 601, respectively, without limitation. Simultaneously, rubber is poured into the annular groove, the positioning through holes 602 and the annular grooves 603, and the inner side and the outer side of the valve core framework 601 are coated, so that the problem that the rubber layer is combined with the valve core framework 601 is guaranteed, and the rubber layer cannot fall off from the valve core framework 601 after swelling in gasoline.

According to one embodiment of the utility model, the sealing layer has a thickness of 0.05mm-0.2mm. Preferably, the thickness of the sealing layer is 1mm. When the thickness of the sealing layer is too large, after the sealing layer swells in gasoline, the outer surface of the sealing layer protrudes out of the outer side surface of the valve core framework, liquid flow is blocked to cause local flow field disorder, and the vacuum degree is unstable, so that the gun closing action of the oil gun is failed. When the thickness of the sealing layer is too small, the service life is short, and the maintenance cost of the oiling gun is increased.

According to one embodiment of the utility model, an adhesive layer is arranged between the sealing layer and the valve core framework, and the adhesive layer is formed by an adhesive. In order to further increase the binding force between the sealing layer and the valve core framework, an adhesive layer formed by an adhesive is added between the sealing layer and the valve core framework, so that the sealing layer is prevented from falling off.

FIG. 8 is a schematic cross-sectional view of a fuel dispenser according to one embodiment of the utility model. As shown in fig. 8, the fuel dispenser 1000 includes a barrel assembly 100, a gun body 200, a valve assembly 300, a drive mechanism 400, and a vacuum cap 500. The gun body 200 comprises an oil inlet, an oil outlet and a liquid channel through which oil liquid passes, and is respectively provided with a valve assembly cavity and a driving mechanism cavity. The oil inlet can be connected with the rubber tube through the inlet thread, and then the oil gun can be connected to the oiling machine. 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 utility model, the gun body 200 may be injection molded. According to one embodiment of the present utility model, the gun body 200 is made of metal or alloy such as aluminum, stainless steel, etc.

The valve assembly 200 is disposed in a valve assembly cavity of the gun body 200 for allowing or preventing oil to pass through the liquid passage. The driving mechanism 400 is connected with the valve assembly 300, and controls the opening or closing of the valve assembly 200, so as to control the oil and/or oil vapor to pass through. The vacuum cap 500 is used to lock the drive mechanism 400. When the drive mechanism 400 is in the locked state, the drive mechanism 400 is in the usable state as a whole. When the drive mechanism 400 is in the unlocked state, the drive mechanism 400 is not available and the opening and closing of the valve assembly 200 cannot be controlled. The barrel assembly 100 is at least partially disposed in a barrel assembly cavity of the gun body 200 for receiving a fluid passage that may be inserted into a fuel tank of a vehicle to charge oil therein.

In summary, according to the venturi valve, the sealing layer is added on the valve core framework of the venturi valve, and the sealing layer is in direct contact with the annular surface of the inner wall of the valve seat, so that the tightness is improved, and the problem of oil leakage when the muzzle faces downwards is prevented. In order to ensure that the problem of unstable vacuum degree caused by local flow field disorder is not caused, the outer side surface of the valve core framework is approximately flush with the outer surface of the sealing layer as much as possible. Further, the sealing layer is coated on the top surface of the valve core framework and the annular groove simultaneously, a plurality of positioning through holes are formed in the top surface of the valve core framework and the annular groove, a plurality of annular grooves are formed in the valve core framework, rubber is poured on the inner side and the outer side of the valve core framework respectively in a rubber coating mode, the tight combination of the rubber layer and the valve core framework is ensured, and the rubber layer and the valve core framework can be prevented from being separated under the double effects of gasoline soaking and flowing flushing.

The above embodiments are provided for illustrating the present utility model and not for limiting the present utility model, and various changes and modifications may be made by one skilled in the relevant art without departing from the scope of the present utility model, therefore, all equivalent technical solutions shall fall within the scope of the present disclosure.

Claims (10)

1. The gun barrel assembly is characterized by comprising a pipe body and a venturi valve, wherein the venturi valve is arranged at one end of the pipe body, and an oil outlet is arranged at the other end of the pipe body;

the venturi valve includes:

the valve core framework is in a truncated cone shape, and at least part of the outer side surface of the valve core framework is provided with an annular groove;

the outer surface of the sealing layer is approximately flush with the outer side surface of the valve core framework;

the valve seat is of a hollow cylinder structure, the shape of the inner wall of the valve seat is matched with the shape of the valve core framework, when the valve core framework is arranged in the valve seat, the valve core framework and the valve seat are coaxially arranged, and the valve core framework can reciprocate in the valve seat along the axis;

when the venturi valve is closed, the valve core framework moves towards the valve seat until the sealing layer contacts with the annular surface of the inner wall.

2. The barrel assembly of claim 1, wherein said sealing layer is a hollow frustoconical coating over said spool backbone top surface and said annular groove.

3. The barrel assembly of claim 1, wherein a plurality of locating through holes are formed in the top surface of the spool frame and the annular groove, the sealing layer is wrapped in the spool frame top surface and the annular groove, and the inner surface of the sealing layer extends toward the interior of the spool frame along the locating through holes.

4. The barrel assembly of claim 3, wherein a plurality of annular grooves are formed in the valve core skeleton, fastening rings of the same material as the sealing layer are respectively arranged in the plurality of annular grooves, and the fastening rings are connected with the inner surface of the sealing layer through the positioning through holes.

5. The barrel assembly of claim 2 or 3, wherein the sealing layer comprises a fluororubber layer and a nitrile rubber layer, the sealing layer being cast onto the spool backbone using an encapsulation process.

6. A barrel assembly according to claim 2 or claim 3, wherein the sealing layer has a thickness of 0.05mm to 0.2mm.

7. The barrel assembly of claim 1, wherein an adhesive layer is disposed between the sealing layer and the spool backbone, the adhesive layer being comprised of an adhesive.

8. The barrel assembly of claim 1, wherein the cross section of the valve core skeleton is an isosceles trapezoid, two base angles of the isosceles trapezoid are vertically cut by two parallel straight lines respectively, and the two parallel straight lines are perpendicular to the bottom surface of the isosceles trapezoid and form an obtuse angle with a waist line.

9. The barrel assembly of claim 1, wherein a gas passage on said valve seat is in communication with said oil outlet when said sealing layer is in contact with an annulus of an inner wall of said valve seat.

10. A fuel dispenser comprising:

the gun body comprises a liquid channel for oil to pass through, and a valve assembly cavity and a driving mechanism cavity are respectively arranged on the gun body;

a valve assembly disposed in the valve assembly chamber for allowing or preventing oil to pass through the liquid passage;

the driving mechanism is arranged in the driving mechanism cavity and used for controlling the opening or closing of the valve assembly; a barrel assembly as claimed in any one of claims 1 to 9, at least partially disposed in the barrel assembly cavity of the gun body for receiving a liquid passageway.