CN219823660U - 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 Venturi valve; the venturi valve includes: a valve core and a valve seat; a valve cartridge, comprising: the valve core framework is of an irregular column structure, and a sealing groove is formed in the outer side face, close to the top face, of the valve core framework; the sealing ring is sleeved in the sealing groove; the valve core shell is in an isosceles trapezoid tubular structure in section, the valve core shell is sleeved on the valve core framework, and the upper edge inner side of the valve core shell is in contact with the surface of the sealing ring, so that the exposed part of the surface of the sealing ring forms a sealing surface; wherein the outer side surface of the valve core framework, the sealing surface and the outer side surface of the valve core shell are approximately on the same plane; the valve seat is of a hollow cylinder structure, and the shape of the inner wall of the valve seat is adapted to the shape of the valve core; when the venturi valve is closed, the valve core moves towards the valve seat until the sealing surface contacts with the annular surface of the inner wall of the valve seat. The sealing surface exposed by the sealing ring on the Venturi valve is just contacted with the annular surface of the inner wall of the valve seat, so that the sealing is realized, and the problem of oil leakage is solved.

Description

Gun barrel assembly and oil gun

Technical Field

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

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: a valve core and a valve seat; the valve core comprises: the valve core framework is of an irregular column structure, and a sealing groove is formed in the outer side face, close to the top face, of the valve core framework; the sealing ring is sleeved in the sealing groove; the valve core shell is in an isosceles trapezoid tubular structure in section, the valve core shell is sleeved on the valve core framework, and the inner side of the upper edge of the valve core shell is in contact with the surface of the sealing ring, so that the exposed part of the surface of the sealing ring forms a sealing surface; wherein the outer side surface of the valve core framework, the sealing surface and the outer side surface of the valve core shell are approximately on the same plane; the valve seat is of a hollow cylinder structure, the shape of the inner wall of the valve seat is matched with that of the valve core, when the valve core is arranged in the valve seat, the valve core and the valve seat are coaxially arranged, and the valve core can reciprocate in the valve seat along the axis; when the venturi valve is closed, the valve core moves towards the valve seat until the sealing surface is in contact with the annular surface of the inner wall of the valve seat.

The barrel assembly as described above further includes a set screw mounted in a transverse mounting hole in the outer side of the spool housing for preventing the spool housing from falling out.

The barrel assembly is characterized in that threads are arranged on the outer side surface, close to the bottom surface, of the valve core framework and the corresponding position of the valve core shell, and the valve core framework is fixed with the valve core shell through the threads.

The barrel assembly is characterized in that the valve core shell is sleeved on the valve core framework, and the valve core shell is in interference fit with the valve core framework.

As for the gun barrel assembly, the sealing ring is circular, and the section of the sealing groove is correspondingly arranged to be straight on one side and arc on the other side.

The diameter of the sealing ring is 8mm-10mm, and the linear diameter of the sealing ring is 1mm-2mm.

The barrel assembly as described above, the sealing surface has a width of 0.3mm to 0.6mm.

The barrel assembly as described above, the seal ring comprises a fluororubber ring and a nitrile rubber ring.

The barrel assembly is characterized in that the cross section of the valve core shell 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 respectively perpendicular to the bottom surface of the isosceles trapezoid and form an obtuse angle with a waist line.

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 utility model, the valve core in the venturi valve is provided with the sealing groove, the sealing ring is arranged in the sealing groove, and the sealing ring is limited to be separated from the sealing groove by utilizing the valve core shell. When the Venturi valve is closed, the exposed sealing surface of the sealing ring is just contacted with the annular surface of the inner wall of the valve seat, so that the sealing is realized, and the aim of preventing oil leakage is fulfilled.

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 perspective view of the exterior of a valve cartridge according to one embodiment of the utility model;

FIG. 4 is a schematic view of the cross-sectional A-A configuration of the valve cartridge of FIG. 3;

FIG. 5 is an enlarged schematic view of the portion S of FIG. 4;

FIG. 6 is a schematic view of the structure of FIG. 4 without the sealing ring at the S portion;

FIG. 7 is a schematic cross-sectional view of a spool housing according to one 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 construction 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 being disposed at one end of the tube body 110, and the other end of the tube body 110 being an oil outlet, as shown in fig. 1 and 2. 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 121 and a valve seat 122, the valve core 121 has a truncated cone structure, the valve seat 122 has 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 121. When the valve element 121 is fitted inside the valve seat 122, the valve element 121 is disposed coaxially with the valve seat 122, and the valve element 121 is capable of reciprocating along an axis inside the valve seat 122. The valve core 121 contacts the valve seat 122 under the action of the spring force, and the venturi valve 120 is closed. When oil flows in at one end of the valve seat 122, the oil washes the valve element 121 away from the valve seat 122, so that the venturi valve 120 is opened and refueling is started. The valve element 121 and the valve seat 122 are generally made of metal, and when the valve element 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, the valve core 121 is additionally provided with a sealing ring, and the sealing ring can be a rubber ring, so that when the venturi valve is closed, the sealing surface of the rubber ring is just in direct contact with the valve seat 122, the contact area is increased, the problem of oil leakage is solved, and the use satisfaction of users is improved.

Referring to fig. 2, the valve seat 122 is symmetrically provided with gas passages 123, and when the sealing layer contacts the annular surface 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 perspective view of the exterior of a valve cartridge according to one embodiment of the present utility model. FIG. 4 is a schematic view of the cross-sectional A-A configuration of the valve cartridge of FIG. 3. As shown in fig. 3 and 4, the spool 121 includes a spool frame 124, a seal ring 125, and a spool housing 126. Wherein, the valve core skeleton 124 is an irregular column structure, and a sealing groove is formed on the outer side of the valve core skeleton close to the top surface. The outer side surface between the sealing groove and the top surface is an inclined surface, and the outer side surface between the sealing groove and the bottom surface can be a vertical surface or an inclined surface. The seal ring 125 is sleeved in the seal groove. The cross-sectional shape of the seal ring 125 includes rectangular, circular. Preferably, the cross-sectional shape of the sealing ring 125 is circular. The seal groove is adapted to the shape of the seal ring 125 and is approximately the same size, preventing the seal ring 125 from falling out of the seal groove after being inflated after being immersed in gasoline, resulting in design failure. The cross section of the valve core shell 126 is in a cylindrical structure of isosceles trapezoid, and the valve core shell 126 is sleeved on the valve core framework 124 along the inner side to be in surface contact with the sealing ring 125, so that the exposed part of the surface of the sealing ring 125 forms a sealing surface.

The spool 121 also includes a set screw 127 mounted in a transverse mounting hole in the outer side of the spool housing 126 for preventing the spool housing 126 from loosening and separating from the spool frame 124. When the spool housing 126 is assembled on the spool frame 124, the fastening screw 127 passes through the mounting hole to abut against the outer surface of the spool frame 124, preventing the spool from loosening during movement.

According to one embodiment of the present utility model, threads are provided on the outer side surface of the spool frame 124 near the bottom surface and the corresponding position of the spool housing 126, and the spool frame 124 and the spool housing 126 are fastened by the threads. When the sealing ring 125 is assembled on the valve core framework 124, the valve core shell 126 is sleeved on the valve core framework 124 from one side of the top surface of the valve core framework 124, and is fixedly connected through threads, so that the assembly is simple and the assembly time is saved.

According to one embodiment of the utility model, the spool housing 126 is sleeved on the spool frame 124, and the spool housing 126 and the spool frame 124 are in interference fit. The outer side surface from the sealing groove to the bottom surface on the valve core framework 124 is an outward-expanding conical surface, and the valve core shell 126 is of a cylindrical structure with a circular cross section, when the valve core shell 126 is sleeved on the valve core framework 124, the valve core shell 126 and the valve core framework 124 are in interference fit with each other along with the increasing width of the outer side surface of the valve core framework 124, so that the valve core framework 124 and the valve core shell 126 are fixed. The two are in interference fit, and the method has the advantages of simple processing, low manufacturing cost and the like.

Referring to fig. 4, the cross section of the valve core 121 is an isosceles trapezoid, two base corners 128 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. The outer side surface of the valve core 121, which is close to one side of the bottom surface, is provided with a plane, so that the valve core 121 is convenient to be clamped 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 valve cartridge 121 to facilitate the fitting.

Fig. 5 is an enlarged schematic view of the portion S in fig. 4. Fig. 6 is a schematic diagram of the structure of the sealing ring without the S part in fig. 4. As shown in fig. 5 and 6, when the seal ring 125 is mounted in the seal groove, the seal surface is not higher than the side surface of the spool frame 124, the spool housing 126 is sleeved on the spool frame 124, and the inner side of the upper edge 1261 of the spool housing 126 contacts with the surface of the seal ring 125, so that the exposed portion of the surface of the seal ring 125 forms the seal surface 1251. The spool frame 124 outer side, the sealing surface 1251, and the spool housing outer side are substantially coplanar. The operation of the valve core requires that the liquid flow along the outer surface of the valve core to create a vacuum. The surface of the valve core needs to be kept as smooth as possible so as not to obstruct the flow, and the vacuum degree is unstable due to the disturbance of a local flow field, so that the gun closing action of the oil gun is failed. Therefore, when the sealing ring 125 and the spool housing 126 are assembled on the spool frame 124, the surface flow of the venturi spool is kept smooth, no influence is exerted on the flow of liquid, and the venturi effect is ensured to be reliably realized.

The sealing ring 125 can be a rubber ring, the rubber ring expands to different degrees in the gasoline environment, if the sealing ring 125 is not restrained, the size of the sealing ring can be increased by more than 7% in the gasoline scouring process, and finally the sealing ring falls off from the sealing groove. In order to solve the above problems, the present utility model designs the spool into two main parts, namely, a spool frame 125 and a spool housing 126, and when the spool frame 125 is assembled on the spool housing 126, the upper edge 1261 contacts with the surface of the sealing ring 125, thereby restraining the sealing ring in the sealing groove. The design failure caused by the fact that the sealing ring 125 is flushed to move positions in the gasoline flowing process or the sealing ring 125 falls off from the sealing groove after being inflated after gasoline soaking is avoided.

According to one embodiment of the utility model, the width D of the sealing surface 1251 is 0.3mm-0.6mm. Preferably, the width D of the sealing surface 1251 is 0.5mm. After the valve core is assembled, the sealing ring exposes a wide annular sealing surface, and when the Venturi valve is closed, the annular sealing surface 1251 on the sealing ring 125 just contacts with the annular surface of the inner wall of the valve seat, so that the sealing function is realized, and the problem of oil leakage is prevented.

As shown in fig. 6 and 5, when the seal ring 125 has a circular cross section, the seal groove has a substantially circular cross section. Thus, the sealing ring 125 can be tightly combined in the sealing groove, and the contact area with gasoline can be reduced. In addition, the two are in close contact, and the space for accommodating deformation is not too much like a sealing groove with a rectangular section. Further, one side of the cross section of the seal groove is a straight line 1241, and the other side is an arc line 1242. When the sealing ring 125 is assembled in the sealing groove, the sealing ring cannot be fully filled in the sealing groove, and the space formed by the reserved straight line 1241 can accommodate the expansion volume of the sealing ring after being soaked in gasoline, so that the sealing ring 125 is prevented from being damaged by backlog. In addition, the structure formed by arc 1242 is "snapped" inwardly into engagement with spool housing 126, which is more conducive to confining the seal ring within the seal groove. Wherein the diameter of the sealing ring is 8mm-10mm, and the wire diameter of the sealing ring is 1mm-2mm. Based on the above structure, those skilled in the art may also perform fine adjustment of other similar detailed structures, which are all within the scope of the present utility model and are not described herein.

According to one embodiment of the utility model, the sealing ring 125 comprises a fluororubber ring and a nitrile rubber ring. Fluororubber and nitrile rubber are rubber materials with certain tolerance to gasoline. Therefore, the use of the fluororubber layer or the nitrile rubber layer can improve the service life of the seal ring 125.

Fig. 7 is a schematic cross-sectional view of a valve cartridge housing according to an embodiment of the present utility model. As shown in fig. 7, the valve core housing 126 has an isosceles trapezoid tubular structure, and a thread is formed on one side of the interior of the valve core housing near the bottom surface, and the interior of the valve core housing 126 is chamfered at a contact position 1261 between the interior and the thread, so that the surface of the sealing ring is prevented from being scratched by the contact position during the assembly process of the valve core housing 126, and the normal operation of the sealing ring is prevented from being affected.

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, a liquid channel for oil supply to pass through, 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 utility model, the valve core in the venturi valve is provided with the sealing groove, the sealing ring is arranged in the sealing groove, and the sealing ring is limited to be separated from the sealing groove by the valve core shell. When the Venturi valve is closed, the exposed sealing surface of the sealing ring is just contacted with the annular surface of the inner wall of the valve seat, so that the sealing is realized, and the aim of preventing oil leakage is fulfilled. Further, in order to prevent the problem that the sealing ring swells when being soaked in gasoline for a long time, the section of the sealing ring is circular, the section of the sealing groove is also approximately circular, one side of the section of the sealing groove is straight, and the other side of the section of the sealing groove is arc-shaped, so that the sealing ring can be limited in the sealing groove, a certain space can be provided for the swelling of the sealing ring, and the service life of the sealing ring is prolonged.

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: a valve core and a valve seat;

the valve core comprises:

the valve core framework is of an axisymmetric structure, and a sealing groove is formed in the outer side face, close to the top face, of the valve core framework;

the sealing ring is sleeved in the sealing groove;

the valve core shell is in an isosceles trapezoid tubular structure in section, the valve core shell is sleeved on the valve core framework, and the inner side of the upper edge of the valve core shell is in contact with the surface of the sealing ring, so that the exposed part of the surface of the sealing ring forms a sealing surface; wherein the outer side surface of the valve core framework, the sealing surface and the outer side surface of the valve core shell are approximately on the same plane;

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

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

2. The barrel assembly of claim 1, further comprising a set screw mounted in a transverse mounting hole in an outer side of the spool housing for preventing the spool housing from falling out.

3. The barrel assembly of claim 1, wherein the outer side of the spool frame proximate the bottom surface and the corresponding location of the spool housing are threaded, the spool frame being threadably secured to the spool housing.

4. The barrel assembly of claim 1, wherein the spool housing is sleeved on the spool frame with an interference fit therebetween.

5. The barrel assembly of claim 1, wherein the seal ring is circular and the cross section of the seal groove is correspondingly arranged with one side being a straight line and the other side being an arc.

6. The barrel assembly of claim 5, wherein the seal ring has a diameter of 8mm to 10mm and a wire diameter of 1mm to 2mm.

7. The barrel assembly of claim 1, wherein the sealing surface has a width of 0.3mm to 0.6mm.

8. The barrel assembly of claim 1, wherein the sealing ring comprises a fluororubber ring and a nitrile rubber ring.

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

10. 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; 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.