A fuel tank filler cap

Abstract

The utility model relates to the technical field of oil tank parts, especially an oil tank filler cap, which comprises a bottom plate, a cover that surrounds the bottom plate to form a cavity, a bypass valve arranged at the center of the bottom plate and located in the cavity, a first through hole that penetrates the bottom plate and is in communication with the bypass valve, a second through hole that penetrates the bottom plate and is in communication with the cavity, and a connecting ring plate arranged on the bottom plate and located between the first through hole and the second through hole, wherein the connecting ring plate is used to connect the oil tank. The utility model sets the bypass valve in the cavity and is in communication with the first through hole. When the internal pressure of the oil tank rises to a set value, the bypass valve is automatically opened to exhaust, the internal and external pressures of the oil tank are rapidly balanced, the risk of fuel vapor spatter caused by the excessively high pressure in the tank when the cover is opened is effectively avoided, and the use safety is significantly improved.

Description

Technical Field

[0001] This utility model relates to the technical field of fuel tank parts, and in particular to a fuel tank filler cap. Background Technology

[0002] The standard fuel tank caps currently in widespread use primarily function to physically seal the filler neck, preventing fuel leakage and the entry of foreign objects. When the pressure inside the fuel tank rises to a high level, if the driver forcibly opens such a traditional fuel tank cap, the high-pressure fuel-gas mixture inside the tank may be rapidly ejected the moment the cap is opened. This poses a direct risk of physical impact injury to the human body. Furthermore, if the ejected fuel vapor encounters an open flame or static electricity, it can easily cause a fire or even an explosion, seriously threatening personal and vehicle safety.

[0003] Therefore, a new type of fuel tank filler cap needs to be developed to overcome the shortcomings of existing technology. Utility Model Content

[0004] The purpose of this utility model is to address the aforementioned shortcomings in the existing technology by proposing a fuel tank filler cap.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A fuel tank filler cap is designed, comprising a base plate, a cover surrounding the base plate to form a cavity, a bypass valve disposed at the center of the base plate and located within the cavity, a first through hole penetrating the base plate and communicating with the bypass valve, a second through hole penetrating the base plate and communicating with the cavity, and a connecting ring plate disposed on the base plate and located between the first and second through holes, wherein the connecting ring plate is used to connect the fuel tank.

[0007] Furthermore, a filter screen is connected between the base plate and the cover.

[0008] Furthermore, a straight rod is provided at the center of the bottom of the base plate, and oil baffles are provided at intervals on the straight rod.

[0009] Furthermore, a positioning sleeve for mounting the straight rod is provided at the center of the bottom of the base plate.

[0010] Furthermore, the first through hole is a circular hole and is distributed in a ring array along the positioning sleeve.

[0011] Furthermore, an oil dipstick is provided at the end of the straight rod.

[0012] Furthermore, the second through hole is fan-shaped and distributed in a ring array along the connecting ring plate.

[0013] Furthermore, the inner wall of the connecting ring plate is provided with threads.

[0014] The fuel tank filler cap proposed in this utility model has the following advantages:

[0015] This utility model provides a bypass valve in the cavity and connects it to the first through hole. When the pressure inside the fuel tank rises to a set value, the bypass valve automatically opens to release gas, so that the pressure inside and outside the fuel tank can be quickly balanced. This effectively avoids the risk of fuel vapor splashing when the cap is opened due to excessive pressure inside the tank, and significantly improves the safety of use.

[0016] By setting a filter screen between the base plate and the cover, the filtration accuracy can reach 20μm, which can effectively block and adsorb oil mist, prevent fuel vapor from being directly discharged into the atmosphere, reduce environmental pollution, and prevent oil stains from accumulating around the fuel filler neck, keeping it clean.

[0017] By installing a straight rod with an oil baffle at the bottom of the base plate, and with the oil baffles spaced apart, the shaking and splashing of oil in the tank caused by vehicle movement can be effectively suppressed, thus improving the internal stability of the tank.

[0018] By installing a dipstick at the end of the straight rod, which extends into the fuel tank, users can visually check the fuel level when removing the filler cap without the need for additional tools. This integrated design of the filler cap and fuel level indicator enhances ease of use. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a side view of the present invention;

[0021] Figure 3 This is a cross-sectional view of the present invention. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figures 1-3 A fuel tank filler cap includes a base plate 1, a cover 3 surrounding the base plate 1 to form a cavity 2, a bypass valve 4 disposed at the center of the base plate 1 and located within the cavity 2, a first through hole 5 penetrating the base plate 1 and communicating with the bypass valve 4, a second through hole 6 penetrating the base plate 1 and communicating with the cavity 2, and a connecting ring plate 7 disposed on the base plate 1 and located between the first through hole 5 and the second through hole 6, wherein the connecting ring plate 7 is used to connect the fuel tank.

[0024] This utility model, by setting a first through hole 5, a second through hole 6 and a bypass valve 4, when the internal pressure of the fuel tank reaches the opening pressure of the bypass valve 4 (0.008MPa), the valve core of the bypass valve 4 pushes the spring to open and release the gas, so that the internal pressure of the fuel tank is kept balanced, effectively avoiding the risk of fuel vapor splashing caused by excessive pressure in the tank when the cap is opened, and significantly improving the safety of use.

[0025] In an optional embodiment of this utility model, a filter screen 8 is connected between the base plate 1 and the cover 3. In this embodiment, the filter screen 8 can be a T-shaped sponge with a filtration accuracy of up to 20um. By setting the filter screen 8, oil mist can be effectively blocked and adsorbed, preventing fuel vapor from being directly discharged into the atmosphere, thus reducing environmental pollution and preventing oil stains from accumulating around the fuel filler neck, keeping it clean.

[0026] In an optional embodiment of this utility model, a straight rod 9 is provided at the center of the bottom of the base plate 1, and an oil baffle 10 is provided on the straight rod 9 at intervals. The oil baffle 10 can effectively suppress the shaking and splashing of oil in the oil tank caused by vehicle driving.

[0027] In an optional embodiment of this utility model, in order to increase the connection strength between the straight rod 9 and the base plate 1 and enhance the connection strength and durability of the overall structure, a positioning sleeve 11 for mounting the straight rod 9 is provided at the bottom center of the base plate 1.

[0028] In an optional embodiment of this utility model, the first through hole 5 is a circular hole and is distributed in a ring array along the positioning sleeve 11. When the pressure inside the fuel tank reaches the opening pressure of the bypass valve 4 (0.008MPa), the bypass valve 4 opens, and the gas in the fuel tank enters the bypass valve 4 through the first through hole 5 and flows into the cavity 2.

[0029] In an optional embodiment of this utility model, the end of the straight rod 9 is provided with an oil dipstick 12, which extends into the oil tank. When the user removes the filler cap, he / she can intuitively check the oil level without additional tools, realizing the integrated design of the filler cap and oil level indicator, and improving the convenience of use.

[0030] In an optional embodiment of this utility model, the second through hole 6 is fan-shaped and distributed in a ring array along the connecting ring plate 7. The air that enters the cavity 2 through the bypass valve 4 is filtered by the filter screen 8 and then quickly discharged through the second through hole 6.

[0031] In one optional embodiment of this utility model, the inner wall of the connecting ring plate 7 is provided with threads. By providing threads on the inner wall of the connecting ring plate 7, it is convenient to quickly install the filler cap onto the filler port of the fuel tank. The installation is simple and the sealing performance is good. The overall structure is compact and occupies little space.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A fuel tank filler cap, characterized in that: Includes a base plate (1), a cover (3) surrounding the base plate (1) to form a cavity (2), a bypass valve (4) disposed at the center of the base plate (1) and located in the cavity (2), a first through hole (5) penetrating the base plate (1) and communicating with the bypass valve (4), a second through hole (6) penetrating the base plate (1) and communicating with the cavity (2), and a connecting ring plate (7) disposed on the base plate (1) and located between the first through hole (5) and the second through hole (6), wherein the connecting ring plate (7) is used to connect an oil tank.

2. The fuel tank filler cap according to claim 1, characterized in that: A filter screen (8) is connected between the base plate (1) and the cover (3).

3. The fuel tank filler cap according to claim 1, characterized in that: The bottom center of the base plate (1) is provided with a straight rod (9), and oil baffles (10) are provided on the straight rod (9) at intervals.

4. The fuel tank filler cap according to claim 3, characterized in that: The bottom center of the base plate (1) is provided with a positioning sleeve (11) for installing the straight rod (9).

5. The fuel tank filler cap according to claim 4, characterized in that: The first through hole (5) is a round hole and is distributed in a ring array along the positioning sleeve (11).

6. The fuel tank filler cap according to claim 3, characterized in that: The straight rod (9) is equipped with an oil dipstick (12) at its end.

7. The fuel tank filler cap according to claim 1, characterized in that: The second through hole (6) is fan-shaped and distributed in a ring array along the connecting ring plate (7).

8. The fuel tank filler cap according to claim 1, characterized in that: The inner wall of the connecting ring plate (7) is threaded.

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