Fuel tank assembly capable of meeting emission requirement through liquid level sealing mode

Abstract

The utility model relates to the technical field of fuel tank structures, and particularly discloses a fuel tank assembly meeting emission requirements in a liquid level sealing mode. The oil filling pipeline is arranged on the side wall of the tank body, the oil inlet end of the oil filling pipeline extends out of the tank body and can be matched with an oil filling gun, the oil outlet end of the oil filling pipeline extends into the bottom of the tank body and is provided with a one-way valve, and the horizontal position of the oil outlet end of the one-way valve is lower than the liquid level of gasoline in the tank body. By means of the arrangement mode that the gasoline liquid level in the fuel tank is higher than the fuel outlet end of the one-way valve, the gasoline liquid level plays a role in sealing the fuel outlet end of the one-way valve, and therefore oil gas volatilization caused by fuel gas expansion in the fuel tank due to the temperature of the outside in the running process of an automobile is reduced, and the purpose of meeting the national sixth emission standard of the current automobile is achieved. Compared with a traditional mechanical sealing valve, the mechanical sealing valve is lower in cost and easier to overhaul and maintain.

Description

Technical Field

[0001] The present application relates to the technical field of oil tank structures, and specifically discloses an oil tank that meets emission requirements through a liquid surface sealing method. Background Art

[0002] A fuel tank is a container used to store gasoline. It can be categorized as either open or closed. Open tanks, with their liquid level exposed to the atmosphere, have an air filter installed on the tank cap to prevent the release of gasoline and fumes. These tanks are often used in fixed locations, such as in the hydraulic systems of large equipment. They offer advantages such as a simple structure and easy installation and maintenance. Closed tanks, on the other hand, store fuel in vehicles and other components. Refueling typically requires opening the tank cap and inserting a refueling nozzle or other device into the tank.

[0003] Since gasoline is volatile, it is easy to dissipate into the air when refueling the tank and during the use of the tank, which not only causes a waste of gasoline, but also pollutes the surrounding environment. It may even cause the fuel tank to catch fire or even explode when exposed to open flames. With the improvement of the industry's standards for gasoline pollutant volatility, especially after the implementation of the National VI standard for automotive gasoline, the traditional fuel tank with a single structure can no longer meet the use requirements. Some fuel tanks are equipped with mechanical sealing valves at the end covers to reduce the emission of gasoline to meet the gasoline pollutant volatility standards. However, mechanical sealing valves are not only expensive, but also prone to loosening after the car is bumped many times, thereby affecting its sealing performance and reducing the sealing effect on gasoline. Therefore, in view of this, the inventor provides a fuel tank that meets emission requirements through liquid surface sealing to solve the above problems. Utility Model Content

[0004] The purpose of the present utility model is to provide an oil tank that meets the discharge requirements through a liquid surface sealing method, so as to solve the relevant technical problems raised by the above background technology.

[0005] In order to achieve the above objectives, the basic solution of the present utility model provides a fuel tank that meets the discharge requirements by means of liquid surface sealing, comprising:

[0006] include:

[0007] Box;

[0008] The refueling pipe is arranged on the side wall of the tank body, and the oil inlet end of the refueling pipe extends out of the tank body and can cooperate with the refueling gun. The oil outlet end of the refueling pipe extends into the bottom of the tank body and is provided with a one-way valve. The horizontal position of the oil outlet end of the one-way valve is lower than the gasoline liquid level in the tank body.

[0009] Furthermore, the inner wall of the oil inlet end of the refueling pipe is provided with a port adapted to the rotating sleeve of the refueling gun, an oil inlet channel adapted to the barrel of the refueling gun, and a notch connected to the air inlet nozzle of the refueling gun, and the side wall of the refueling pipe is provided with a through hole located in the box body and connected to the notch.

[0010] Furthermore, the one-way valve comprises:

[0011] a housing connected to the bottom of the refueling pipe and having an oil hole in the housing communicating with the refueling pipe;

[0012] A fixing sleeve, provided on the housing;

[0013] an end cover, hinged to the fixing sleeve and capable of sealing the oil hole;

[0014] A return spring drives the end cover to return to its original position to seal the oil hole;

[0015] The gasoline liquid level in the box body is higher than the horizontal position of the end cover.

[0016] Furthermore, it also includes a hinged rod rotatably connected to the fixed sleeve, both ends of the hinged rod respectively extend out of the fixed sleeve and are connected to the end cover, and the reset spring is a torsion spring and is arranged between the inner wall of the fixed sleeve and the outer wall of the hinged rod.

[0017] Furthermore, both ends of the hinged rod are provided with hinge ears which are rotatably and sealingly connected to the end of the fixed sleeve, and the end cover is connected to the hinge ears.

[0018] Furthermore, the refueling pipe is arranged obliquely along the tank body.

[0019] The principle and effect of this solution are:

[0020] Compared with the prior art, the present invention utilizes the setting mode that the gasoline liquid level in the fuel tank is higher than the oil outlet end of the one-way valve, so that the gasoline liquid surface seals the oil outlet end of the one-way valve, thereby reducing the oil and gas emission during the use of the fuel tank, so as to achieve the purpose of meeting the National VI standard for automotive gasoline. Compared with the traditional fuel tank with a mechanical sealing valve, the present invention has lower cost and is easier to inspect and maintain. In addition, the present invention arranges a notch at the oil inlet end of the refueling pipe and a through hole on the side wall of the refueling pipe, and utilizes the micro-negative pressure environment formed by the air pressure compensation during the refueling process of the refueling gun, so that the oil and gas between the inner wall of the refueling pipe and the outer wall of the refueling gun are sucked in through the notch and finally flow into the tank body, thereby reducing the oil and gas emission of the fuel tank during the refueling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 A schematic diagram of an oil tank proposed in an embodiment of the present application that meets emission requirements by means of a liquid surface sealing method is shown;

[0023] Figure 2 A schematic diagram of the interior of a fuel tank proposed in an embodiment of the present application, which meets emission requirements by means of a liquid surface sealing method;

[0024] Figure 3 A schematic diagram of a refueling pipeline in a fuel tank proposed in an embodiment of the present application that meets emission requirements by means of a liquid surface sealing method is shown;

[0025] Figure 4 A schematic diagram of the interior of a fuel inlet end of a fuel tank refueling pipe in an embodiment of the present application that meets emission requirements by means of a liquid surface sealing method is shown;

[0026] Figure 5 A schematic diagram of the structure of a one-way valve in a fuel tank proposed in an embodiment of the present application is shown, which meets emission requirements through liquid surface sealing. DETAILED DESCRIPTION

[0027] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the following is a detailed description of the specific implementation method, structure, characteristics and effects of the present invention in combination with the accompanying drawings and preferred embodiments.

[0028] The reference numerals in the drawings of the specification include: box body 1, refueling pipe 2, oil inlet end 3, notch 301, oil inlet channel 302, one-way valve 4, shell 401, fixing sleeve 402, hinge ear 403, end cover 404, through hole 5.

[0029] A fuel tank assembly that meets emission requirements by means of liquid surface sealing, for example Figure 1 As shown, it includes a box body 1 and a refueling pipe 2 obliquely arranged on the side wall of the box body 1, as follows:

[0030] Box body 1: The outer wall of box body 1 is provided with a number of mounting ears for mounting box body 1 and a one-way filter valve nozzle for circulating the interior of box body 1 with the outside atmosphere. The one-way filter valve nozzle allows air to enter the interior of box body 1 only after being filtered from the outside atmosphere, and cannot circulate from the interior of box body 1 to the outside.

[0031] Refueling pipeline 2: Figure 2 and Figure 3 As shown, the refueling pipe 2 is fixed to the side wall of the box body 1 by welding, and the oil inlet end 3 of the refueling pipe 2 extends out of the box body 1 and can cooperate with the refueling gun. Specifically, Figure 3 and Figure 4 As shown, the inner wall of the oil inlet end 3 of the refueling pipe 2 is provided with a port adapted to the rotating sleeve of the refueling gun, an oil inlet channel 302 adapted to the barrel of the refueling gun and a notch 301 connected to the air inlet nozzle of the refueling gun, and the side wall of the refueling pipe 2 is provided with a through hole 5 located in the box body 1 and interconnected with the notch 301. When refueling, the barrel of the refueling gun enters the refueling pipe through the oil inlet channel 302, and the barrel of the refueling gun and the inner wall of the oil inlet channel 302 are adapted to fit each other. At the same time, the rotating sleeve of the refueling gun and the port of the refueling pipe 2 are adapted to fit each other. The port of the refueling pipe 2 is detachably sealed with a sealing plug, and the port of the refueling pipe 2 and the sealing plug are threaded. The inner wall of the port of the refueling pipe 2 is provided with an internal thread, and the sealing plug is provided with an external thread adapted to fit the internal thread.

[0032] The oil outlet end of the refueling pipe 2 extends into the bottom of the box 1 and is provided with a one-way valve 4. Figure 5 As shown, the horizontal position of the oil outlet end of the one-way valve 4 is lower than the gasoline liquid level in the tank 1. The one-way valve 4 includes a shell 401, a fixed sleeve 402, an end cover 404 and related structures such as a return spring, which are specifically as follows: the shell 401 is connected to the bottom of the refueling pipe 2 and an oil hole connected to the refueling pipe 2 is provided inside the shell 401. The fixed sleeve 402 is provided on the shell 401 in an integrally formed manner. The end cover 404 is hinged to the fixed sleeve 402 and can seal the oil hole. Specifically, the fixed sleeve 402 is rotatably connected to a hinged rod, and both ends of the hinged rod respectively extend out of the fixed sleeve 402 and are provided with hinge ears 403 connected to the end cover 404. The hinge ears 403 are respectively rotatably sealed with both ends of the fixed sleeve 402. The return spring is a torsion spring and is provided between the inner wall of the fixed sleeve and the outer wall of the hinged rod. The gasoline liquid level in the tank 1 is higher than the horizontal position of the end cover 404.

[0033] During the implementation of the present invention, since the gasoline level in the tank body 1 is higher than the horizontal position of the end cover 404, the gasoline liquid surface seals the oil outlet end of the one-way valve 4, thereby reducing the emission of oil and gas during the use of the fuel tank, and since the refueling pipe 2 is provided on the tank body 1, the volatilization of gasoline on the liquid surface in the tank body 1 can be effectively reduced. By providing a notch 301 at the oil inlet end 3 of the refueling pipe 2 and a passage on the side wall of the refueling pipe 2, and utilizing the micro-negative pressure environment formed by air pressure compensation during refueling with the refueling gun, the oil and gas between the inner wall of the refueling pipe 2 and the outer wall of the refueling gun are sucked in through the notch 301 and finally flow into the tank body 1, thereby reducing the emission of oil and gas in the fuel tank during refueling, so as to meet the industry's oil pollutant volatilization standards, that is, to meet the purpose of meeting the National VI standard for automotive gasoline. Compared with traditional fuel tanks with mechanical sealing valves, this embodiment has the performance advantages of low cost and easy maintenance.

[0034] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A fuel tank assembly that meets emission requirements through liquid surface sealing, characterized in that: include: Box; A refueling pipe is provided on a side wall of the tank body, with an oil inlet end of the refueling pipe extending out of the tank body and being compatible with a refueling gun, and an oil outlet end of the refueling pipe extending into the bottom of the tank body and provided with a one-way valve, wherein the oil outlet end of the one-way valve is positioned at a level lower than the gasoline liquid level in the tank body; The one-way valve comprises: a housing connected to the bottom of the refueling pipe and having an oil hole in the housing communicating with the refueling pipe; A fixing sleeve, provided on the housing; an end cover, hinged to the fixing sleeve and capable of sealing the oil hole; A return spring drives the end cover to return to its original position to seal the oil hole; The gasoline liquid level in the box body is higher than the horizontal position of the end cover.

2. A fuel tank assembly that meets emission requirements through liquid surface sealing according to claim 1, characterized in that: The inner wall of the oil inlet end of the refueling pipe is provided with a port adapted to the rotating sleeve of the refueling gun, an oil inlet channel adapted to the barrel of the refueling gun, and a notch connected to the air inlet nozzle of the refueling gun. The side wall of the refueling pipe is provided with a through hole located in the box body and connected to the notch.

3. A fuel tank assembly that meets emission requirements through liquid surface sealing according to claim 1, characterized in that: It also includes a hinged rod rotatably connected to the fixing sleeve, both ends of the hinged rod respectively extend out of the fixing sleeve and are connected to the end cover, and the return spring is a torsion spring and is arranged between the inner wall of the fixing sleeve and the outer wall of the hinged rod.

4. A fuel tank assembly that meets emission requirements through liquid surface sealing according to claim 3, characterized in that: Both ends of the hinged rod are provided with hinge ears which are rotatably and sealingly connected to the end of the fixed sleeve, and the end cover is connected to the hinge ears.

5. A fuel tank assembly that meets emission requirements through liquid surface sealing according to claim 4, characterized in that: The refueling pipe is arranged obliquely along the tank body.

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