Oil dripping prevention oil gun

Abstract

The utility model belongs to the technical field of oil guns, and discloses an oil dripping prevention oil gun which is provided with a liquid channel, an oil-gas separation valve, a pressure relief valve element, a main valve and an ejector rod assembly which are sequentially distributed in the direction from the oil inlet end to the oil outlet end. The ejector rod assembly can push the main valve and the pressure relief valve element to move towards the oil inlet end so that the liquid channel can be communicated, the pressure relief valve element is sleeved with a spring, one end of the spring abuts against the pressure relief valve element, the other end of the spring abuts against the oil-gas separation valve, and the spring can push the pressure relief valve element, the main valve and the ejector rod assembly to move towards the oil outlet end so that the liquid channel can be closed. The pressure relief valve element arranged in the gun body is matched with the first pressure relief hole, hydraulic impact generated when the oil gun is closed can be absorbed, and therefore the risk of oil leakage is reduced, the defect that part of existing reverse oil pressure oil guns are not provided with pressure relief mechanisms is overcome, and safety in the oil filling process is further guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of fuel nozzle technology, and in particular to a drip-proof fuel nozzle. Background Technology

[0002] In recent years, vapor recovery fuel nozzles have been widely used in gas stations. These nozzles and systems effectively solve the pollution problem caused by vapor overflow from the fuel tank opening during refueling. However, currently widely used vapor recovery nozzles still have certain shortcomings.

[0003] Some fuel dispensers use a forward-pressure valve design. If the pressure at the rear of the dispenser is too high, fuel can seep into the nozzle from the valve. This means that even if the dispenser is not open, fuel may leak from the nozzle during operation. Other dispensers, while using a reverse-pressure valve, lack a pressure relief mechanism. After the dispenser automatically closes, high pressure can accumulate in the rear pipeline, significantly increasing the risk of fuel leakage.

[0004] Therefore, a drip-proof refueling nozzle is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a drip-proof refueling gun, thereby solving or at least alleviating one or more of the aforementioned problems and other issues existing in the prior art.

[0006] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0007] A drip-proof refueling nozzle includes a nozzle body, with an oil inlet and an oil outlet respectively provided at both ends of the nozzle body;

[0008] The gun body is provided with a liquid channel, an oil-gas separation valve, a pressure relief valve core, a main valve and a push rod assembly, and the oil-gas separation valve, the pressure relief valve core, the main valve and the push rod assembly are distributed in sequence from the oil inlet end to the oil outlet end;

[0009] The push rod assembly can push the main valve and the pressure relief valve core to move towards the oil inlet end, thereby opening the liquid passage;

[0010] A spring is fitted on the pressure relief valve core. One end of the spring abuts against the pressure relief valve core, and the other end of the spring abuts against the oil-gas separator valve. The spring can push the pressure relief valve core, the main valve, and the push rod assembly to move towards the oil outlet end, thereby closing the liquid passage.

[0011] In a drip-proof refueling nozzle according to the present invention, one end of the push rod assembly near the oil inlet passes through the main valve and abuts against the end face of the pressure relief valve core.

[0012] In a drip-proof refueling nozzle according to the present invention, a first sealing ring and a second sealing ring are fixedly installed at both ends of the main valve, the first sealing ring being able to make sealing contact with the nozzle body, and the second sealing ring being able to make sealing contact with one end of the pressure relief valve core.

[0013] In a drip-proof refueling nozzle according to the present invention, the pressure relief valve core is provided with a first pressure relief hole for absorbing the hydraulic shock when the refueling nozzle is closed.

[0014] According to the present invention, a drip-proof refueling gun further includes a barrel connected to the oil outlet end, the end of the barrel away from the oil outlet end being an oil outlet, and the barrel being connected to the liquid channel.

[0015] In a drip-proof refueling gun according to the present invention, an air intake valve seat and an air intake valve core are provided at one end of the gun barrel near the oil outlet end. A return spring is provided at the rear end of the air intake valve core, and the return spring can push the air intake valve core to press against the air intake valve seat.

[0016] In a drip-proof refueling gun according to the present invention, a second pressure relief hole is provided on the suction valve core.

[0017] This utility model has at least the following beneficial effects:

[0018] This utility model, by using a pressure relief valve core and a first pressure relief hole set in the gun body, can absorb the hydraulic shock generated when the refueling gun is closed, thereby reducing the risk of oil leakage, making up for the shortcomings of some existing reverse oil pressure refueling guns that do not have a pressure relief mechanism, and further ensuring the safety of the refueling process.

[0019] An intake valve seat and an intake valve core are installed at the end of the nozzle near the oil outlet. The return spring at the rear end of the intake valve core can push it to press against the intake valve seat, forming a good sealing structure. At the same time, the second pressure relief hole on the intake valve core can balance the pressure during the refueling process, reduce the impact of pressure fluctuations on the sealing performance, further reduce the possibility of oil and gas leakage and dripping, and improve the environmental performance of the refueling nozzle. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0021] Figure 1 This is a schematic diagram of the cross-sectional structure of the refueling nozzle of this utility model;

[0022] Figure 2 This is a cross-sectional structural diagram of the pressure relief valve core of this utility model;

[0023] Figure 3 This is a cross-sectional structural diagram of the gun barrel of this utility model.

[0024] Explanation of icon numbers:

[0025] 1. Gun body; 11. Oil inlet end; 12. Oil outlet end; 2. Gun barrel; 21. Suction valve seat; 22. Suction valve core; 23. Return spring; 24. Second pressure relief hole; 3. Push rod assembly; 4. Main valve; 5. Pressure relief valve core; 501. First pressure relief hole; 6. Oil-gas separation valve; 7. Spring. Detailed Implementation

[0026] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0027] Please refer to Figures 1 to 3 As shown, an embodiment of the present invention provides a drip-proof refueling gun, including a gun body 1, wherein an oil inlet end 11 and an oil outlet end 12 are respectively provided at both ends of the gun body 1.

[0028] The gun body 1 is equipped with a liquid channel, an oil-gas separation valve 6, a pressure relief valve core 5, a main valve 4, and a push rod assembly 3. The oil-gas separation valve 6, the pressure relief valve core 5, the main valve 4, and the push rod assembly 3 are distributed in sequence from the oil inlet end 11 to the oil outlet end 12.

[0029] The push rod assembly 3 can push the main valve 4 and the pressure relief valve core 5 to move towards the oil inlet 11, so as to open the liquid passage;

[0030] A spring 7 is fitted on the pressure relief valve core 5. One end of the spring 7 abuts against the pressure relief valve core 5, and the other end of the spring 7 abuts against the oil-gas separator valve 6. The spring 7 can push the pressure relief valve core 5, the main valve 4 and the push rod assembly 3 to move towards the oil outlet 12, thereby closing the liquid passage.

[0031] When refueling begins, the operator operates the push rod assembly 3, moving it towards the inlet end 11. This causes the main valve 4 and the pressure relief valve core 5 to move together towards the inlet end 11, opening the previously closed liquid passage. Oil enters the liquid passage within the nozzle body 1 from the inlet end 11, and after the gas is separated by the oil-gas separator valve 6, it flows to the outlet end 12. When refueling is complete, the operator stops applying force to the push rod assembly 3. At this time, the spring 7 on the pressure relief valve core 5 releases its elasticity, pushing the pressure relief valve core 5, the main valve 4, and the push rod assembly 3 towards the outlet end 12, thereby closing the liquid passage again and stopping the flow of oil.

[0032] In this embodiment, the end of the push rod assembly 3 near the oil inlet 11 passes through the main valve 4 and abuts against the end face of the pressure relief valve core 5.

[0033] With the above configuration, when the operator applies force to the push rod assembly 3 towards the oil inlet 11, the force can be accurately transmitted to the pressure relief valve core 5 through contact, thereby driving the main valve 4 to move towards the oil inlet 11 and opening the liquid passage. When the spring 7 pushes the component to move towards the oil outlet 12, it also ensures that the push rod assembly 3 moves synchronously with the main valve 4 and the pressure relief valve core 5, ultimately closing the liquid passage.

[0034] In this embodiment, a first sealing ring and a second sealing ring are fixedly installed at both ends of the main valve 4. The first sealing ring can make sealing contact with the gun body 1, and the second sealing ring can make sealing contact with one end of the pressure relief valve core 5.

[0035] When spring 7 pushes the main valve 4 and pressure relief valve core 5 towards the oil outlet 12 to close the liquid passage, the first and second sealing rings at both ends of the main valve 4 are tightly fitted with the nozzle body 1 and pressure relief valve core 5, respectively, forming a sealing structure. This sealing structure can effectively prevent oil leakage from the connection between the main valve 4 and the nozzle body 1, and between the main valve 4 and the pressure relief valve core 5 when the liquid passage is closed, thus improving the sealing performance and safety of the refueling nozzle.

[0036] In this embodiment, the pressure relief valve core 5 is provided with a first pressure relief hole 501 for absorbing the hydraulic shock when the refueling gun is closed.

[0037] When the refueling nozzle is closed, the sudden cessation of oil flow in the liquid channel generates a significant hydraulic shock, which may lead to component damage or oil leakage. At this moment, the first pressure relief hole 501 acts as a buffer, reducing the pressure within the liquid channel, absorbing the hydraulic shock, and preventing oil leakage.

[0038] In this embodiment, a gun barrel 2 connected to the oil outlet 12 is also included. The end of the gun barrel 2 away from the oil outlet 12 is the oil outlet, and the gun barrel 2 is connected to the liquid channel.

[0039] Once the liquid channel is open, the oil flows from the oil outlet 12 of the gun body 1 into the connected gun barrel 2, and then is delivered to the container that needs refueling through the oil outlet of the gun barrel 2. The gun barrel 2 serves to guide the flow of oil and control the direction of refueling, ensuring that the oil is accurately injected into the target location.

[0040] Furthermore, a suction valve seat 21 and a suction valve core 22 are provided at one end of the barrel 2 near the oil outlet 12. A return spring 23 is provided at the rear end of the suction valve core 22. The return spring 23 can push the suction valve core 22 to press against the suction valve seat 21.

[0041] When the refueling nozzle is not in operation, the return spring 23 pushes the suction valve core 22 to press tightly against the suction valve seat 21, keeping the suction valve closed and preventing oil leakage. During refueling, the suction valve core 22, under the hydraulic pressure of the oil, overcomes the elastic force of the return spring 23 and moves away from the suction valve seat 21, opening the suction valve 22. After refueling is completed, the external force disappears, and the return spring 23 pushes the suction valve core 22 back onto the suction valve seat 21, closing the suction valve.

[0042] Furthermore, a second pressure relief hole 24 is provided on the intake valve core 22.

[0043] During refueling, the pressure inside the nozzle 2 may change. The second pressure relief port 24 can balance the pressure inside the nozzle 2. When the pressure inside the nozzle 2 increases, some gas or oil can be discharged or flow through the second pressure relief port 24, preventing excessive pressure from affecting the sealing performance of the intake valve and ensuring the normal operation of the intake valve. When the refueling nozzle is closed, the second pressure relief port 24 can also assist the first pressure relief port 501 in balancing the pressure, reducing the impact of pressure fluctuations on the entire refueling nozzle system.

[0044] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the present invention's conception through the foregoing teachings or related technical or knowledge. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A drip-proof refueling nozzle, characterized in that, Includes a gun body (1), and the gun body (1) is provided with an oil inlet (11) and an oil outlet (12) at its two ends respectively; The gun body (1) is provided with a liquid channel, an oil-gas separation valve (6), a pressure relief valve core (5), a main valve (4) and a push rod assembly (3). The oil-gas separation valve (6), the pressure relief valve core (5), the main valve (4) and the push rod assembly (3) are distributed in sequence from the oil inlet end (11) to the oil outlet end (12). The push rod assembly (3) can push the main valve (4) and the pressure relief valve core (5) toward the oil inlet (11) to open the liquid passage; A spring (7) is fitted on the pressure relief valve core (5). One end of the spring (7) abuts against the pressure relief valve core (5), and the other end of the spring (7) abuts against the oil-gas separator valve (6). The spring (7) can push the pressure relief valve core (5), the main valve (4), and the push rod assembly (3) to move toward the oil outlet (12) to close the liquid passage.

2. The anti-drip refueling nozzle according to claim 1, characterized in that: The end of the push rod assembly (3) near the oil inlet (11) passes through the main valve (4) and abuts against the end face of the pressure relief valve core (5).

3. The anti-drip refueling nozzle according to claim 2, characterized in that: The main valve (4) is fixedly installed with a first sealing ring and a second sealing ring at both ends. The first sealing ring can make a sealing contact with the gun body (1), and the second sealing ring can make a sealing contact with one end of the pressure relief valve core (5).

4. The anti-drip refueling nozzle according to claim 3, characterized in that: The pressure relief valve core (5) is provided with a first pressure relief hole (501) for absorbing the hydraulic shock when the fuel nozzle is closed.

5. The anti-drip refueling nozzle according to claim 1, characterized in that: It also includes a gun barrel (2) connected to the oil outlet (12), with the end of the gun barrel (2) away from the oil outlet (12) being the oil outlet, and the gun barrel (2) being connected to the liquid channel.

6. The anti-drip refueling nozzle according to claim 5, characterized in that: The gun barrel (2) is provided with an intake valve seat (21) and an intake valve core (22) at one end near the oil outlet (12). A return spring (23) is provided at the rear end of the intake valve core (22). The return spring (23) can push the intake valve core (22) to press against the intake valve seat (21).

7. The anti-drip refueling nozzle according to claim 6, characterized in that: The intake valve core (22) is provided with a second pressure relief hole (24).

Images