Fuel tank assembly capable of meeting emission requirements in liquid level sealing mode

Abstract

The invention 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 fuel tank structures, and specifically discloses a fuel tank assembly that meets emission requirements through liquid surface sealing. Background Art

[0002] A fuel tank is a container for storing gasoline, and can be divided into two types: open and closed. In an open tank, the liquid level in the tank is connected to the atmosphere, and an air filter is installed on the tank cap to prevent the oil and gas from escaping into the atmosphere. It is mostly used in scenes with relatively fixed places of use, such as the hydraulic system of large equipment, and has the advantages of simple structure, easy installation and maintenance, etc. A closed tank is a fuel storage device for vehicles and other components. When adding fuel to a closed tank, the fuel tank cap on the surface of the tank is usually opened, and then a refueling gun and other equipment are inserted into the tank to add fuel.

[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 wastes gasoline, but also pollutes the surrounding environment and 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 the volatility of gasoline pollutants, 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, and 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, the mechanical sealing valve is not only expensive, but also prone to loose sealing after the car has been bumped many times, thereby affecting its sealing performance and further reducing the sealing effect on the gasoline. Therefore, in view of this, the inventor provides a fuel tank assembly that meets the emission requirements through liquid surface sealing to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a fuel tank assembly that meets emission requirements by means of liquid surface sealing, so as to solve the related technical problems raised by the above-mentioned background technology.

[0005] In order to achieve the above object, the basic scheme of the present invention provides a fuel tank assembly that meets the emission requirements by means of liquid surface sealing, comprising:

[0006] include:

[0007] Box;

[0008] The refueling pipe is arranged on the side wall of the box body, and the oil inlet end of the refueling pipe extends out of the box body and can cooperate with the refueling gun. The oil outlet end of the refueling pipe extends into the bottom of the box 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 box 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] Further, the one-way valve comprises:

[0011] A shell body connected to the bottom of the refueling pipeline and having an oil hole in the shell body communicating with the refueling pipeline;

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

[0013] An end cover, hinged to the fixed 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 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.

[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 box body.

[0019] The principle and effect of this scheme 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 emission of oil and gas 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 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 emission of oil and gas in 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 drawings required for use in the description of the embodiments will be briefly introduced below. 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 a fuel tank assembly proposed in an embodiment of the present application that meets emission requirements by means of liquid surface sealing is shown;

[0023] Figure 2 The internal schematic diagram of a fuel tank assembly proposed in an embodiment of the present application that meets emission requirements by means of liquid surface sealing is shown;

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

[0025] Figure 4 The internal schematic diagram of the oil inlet end of the fuel filling pipe in the fuel tank assembly proposed in the embodiment of the present application is shown in a liquid surface sealing manner to meet the emission requirements;

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

[0027] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below 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 a liquid surface seal, 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 plurality of mounting ears for mounting box body 1 and a one-way filter valve nozzle for circulating the inside of box body 1 with the outside atmosphere. The one-way filter valve nozzle allows air to enter the inside of box body 1 only after being filtered from the outside atmosphere, but cannot circulate from the inside 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, and 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, and the port of the refueling pipe 2 is detachably sealed and connected with a sealing plug, and the port of the refueling pipe 2 and the sealing plug are threaded, wherein the inner wall of the port of the refueling pipe 2 is configured with an internal thread, and the sealing plug is provided with an external thread adapted to the internal thread.

[0032] The oil outlet end of the refueling pipe 2 extends into the bottom of the box body 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 box body 1. The one-way valve 4 includes a shell 401, a fixed sleeve 402, an end cover 404 and a reset spring and other related structures, 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 arranged 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 hinge rod, and both ends of the hinge 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 and connected to both ends of the fixed sleeve 402. The reset spring is a torsion spring and is provided between the inner wall of the fixed sleeve and the outer wall of the hinge rod. The gasoline liquid level in the box body 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 box 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 box body 1, the volatilization of gasoline on the liquid surface in the box body 1 can be effectively reduced, and a notch 301 is provided at the oil inlet end 3 of the refueling pipe 2 and a through-hole is provided on the side wall of the refueling pipe 2, and a micro-negative pressure environment is formed by air pressure compensation during the refueling process of the refueling gun, and the oil and gas between the inner wall of the refueling pipe 2 and the outer wall of the refueling gun are sucked through the notch 301 and finally flow into the box body 1, that is, the emission of oil and gas in the fuel tank during the refueling process is reduced 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 the traditional fuel tank with a mechanical sealing valve, this embodiment has the performance advantages of low cost and easy maintenance.

[0034] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments 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 by means of liquid surface sealing, characterized in that: include: Box; The refueling pipe is arranged on the side wall of the box body, and the oil inlet end of the refueling pipe extends out of the box body and can cooperate with the refueling gun. The oil outlet end of the refueling pipe extends into the bottom of the box 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 box body.

2. A fuel tank assembly that meets emission requirements by means of 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, and the side wall of the refueling pipe is provided with a through hole located in the box and connected to the notch.

3. A fuel tank assembly that meets emission requirements by means of liquid surface sealing according to claim 1 or 2, characterized in that: The one-way valve comprises: A shell body connected to the bottom of the refueling pipeline and having an oil hole in the shell body communicating with the refueling pipeline; A fixing sleeve, arranged on the housing; A sealing flap, hinged to the fixed sleeve and capable of sealing the oil hole; A return spring drives the sealing flap 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 sealing flap.

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

5. A fuel tank assembly that meets emission requirements by means of liquid surface sealing according to claim 4, 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 sealing flap is connected to the hinge ears.

6. A fuel tank assembly that meets emission requirements by means of liquid surface sealing according to claim 5, characterized in that: The refueling pipeline is arranged obliquely along the box body.

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