Fuel valve for a fuel tank

Abstract

The utility model relates to the field of vehicles, in particular to a fuel valve (1) for a fuel tank, which comprises a pipe body (11), a valve body (12), a valve body (13) and a valve body (14). The pipe body (11) comprises a fuel blocking structure suitable for blocking fuel from permeating outwards in the radial direction. The annular flange (12) protrudes outwards in the radial direction from the periphery of the pipe body (11), the annular flange (12) is provided with a flange body (121) and a welding structure (122) suitable for being welded to a shell (101) of the fuel tank (10), and the welding structure (122) is connected with the flange body (121) by being embedded in the flange body (121) or wrapping the flange body (121). According to certain exemplary embodiments of the utility model, the fuel valve (1) is simpler in structure and easier to manufacture, the cost can be obviously reduced, and even the performance is also improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of vehicle, more particularly to a fuel valve for a fuel tank of a vehicle, which is welded to a housing of the fuel tank and keeps in communication with an interior of the fuel tank. BACKGROUND

[0002] In a fuel (e.g. fuel oil) supply system of a vehicle, a fuel valve is usually required to balance the pressure inside and outside the fuel tank. Such a fuel valve is usually welded to a housing of the fuel tank. At present, with the increasing competition among various vehicle manufacturers, it is increasingly required to reduce the cost of each component while meeting the performance requirements, and the fuel valve is an important component.

[0003] For this reason, corresponding improvements are required. SUMMARY

[0004] In order to overcome at least one of the above-mentioned drawbacks and / or other possible drawbacks in the prior art not mentioned here, the object of the utility model is to provide an improved fuel valve for a fuel tank.

[0005] According to one aspect of the utility model, a fuel valve for a fuel tank is provided, comprising: a tube body comprising a fuel barrier structure adapted to radially block the penetration of fuel outward; and an annular flange protruding radially outward from the outer periphery of the tube body, the annular flange having a flange body and a welding structure adapted to be welded to the housing of the fuel tank, wherein the welding structure is connected to the flange body by being embedded in the flange body or coated on the flange body.

[0006] According to one exemplary embodiment of the utility model, the fuel barrier structure is configured as a fuel barrier structure formed of polyhexamethylene adipamide.

[0007] According to one exemplary embodiment of the utility model, the welding structure is configured as a welding structure formed of polyethylene.

[0008] According to one exemplary embodiment of the utility model, the welding structure is configured as a welding structure formed of modified polyethylene.

[0009] According to one exemplary embodiment of the utility model, the modified polyethylene is polyethylene modified by maleic anhydride.

[0010] According to one exemplary embodiment of the utility model, the tube body is configured as a tube body formed of polyhexamethylene adipamide.

[0011] According to one exemplary embodiment of the utility model, the flange body is configured as a flange structure formed of polyhexamethylene adipamide.

[0012] According to one example embodiment of the present application, the flange body is connected to the tube body by integral injection molding.

[0013] According to one example embodiment of the present application, the welding structure is configured to be embedded in the annular structure of the flange body.

[0014] According to one example embodiment of the present application, the welding structure is configured as a preform.

[0015] According to one example embodiment of the present application, the welding structure includes an embedded portion embedded in the flange body and a protruding portion protruding from the flange body.

[0016] According to one example embodiment of the present application, the welding structure is embedded in the flange body by two-color injection molding.

[0017] According to one example embodiment of the present application, the protruding portion is radially outwardly inclined relative to the embedded portion.

[0018] According to certain example embodiments of the present application, the fuel valve structure of the present application is simpler, easier to manufacture, and can significantly reduce costs, and even performance is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] The principles, features and advantages of the present application will be better understood by referring to the following detailed description of example embodiments, taken in conjunction with the accompanying drawings, in which:

[0020] Figure 1 A fuel valve for a fuel tank of a vehicle according to one example embodiment of the present application is shown in a partial cross-sectional view. DETAILED DESCRIPTION

[0021] In order to make the technical problems to be solved by the present application, the technical solutions and the beneficial technical effects more clear, the present application will be further described in detail below in conjunction with the drawings and multiple example embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the protection scope of the present application.

[0022] Figure 1 A fuel valve for a fuel tank of a vehicle according to one example embodiment of the present application is shown in a partial cross-sectional view. The fuel valve is particularly used for ventilation of the fuel tank to the outside.

[0023] As Figure 1As shown, according to one exemplary embodiment of the present utility model, a fuel valve 1 for a fuel tank is provided, the fuel valve 1 comprising: a tube body 11 comprising a fuel blocking structure adapted to block fuel from permeating outward in a radial direction; and an annular flange 12 protruding radially outward from an outer periphery of the tube body 11, the annular flange 12 having a flange body 121 and a welding structure 122 adapted to be welded to a housing 101 of the fuel tank 10, wherein the welding structure 122 is connected to the flange body 121 by being embedded in or coated on the flange body 121.

[0024] Here, it is pointed out that the present utility model may refer to certain materials below, but these materials are known materials, and the purpose of the present utility model is not to improve the materials themselves, but to use existing known materials to construct the fuel valve 1. Therefore, the present utility model is fully within the scope of protectable objects.

[0025] Figure 1 As shown, the fuel valve 1 is an exemplary embodiment of a fuel tank as a refueling inlet valve. Of course, the fuel valve 1 can also be a refueling limiting valve for limiting refueling, a gravity valve for allowing fuel to flow into a carburetor by gravity, a breather valve for balancing the air pressure inside and outside the fuel tank to prevent the pressure inside the fuel tank from being too high and causing danger, a roll-over valve for preventing fuel from overflowing and reducing fuel evaporation pollutants, etc. These valves, although different in function, also differ in structure, but all have the need for welding connection with the fuel tank and all have the tube body 11 in contact with fuel. Therefore, Figure 1 It is only an example of a fuel valve.

[0026] According to one exemplary embodiment of the present utility model, the fuel blocking structure is configured as a fuel blocking structure formed of polyhexamethylene adipamide.

[0027] According to one exemplary embodiment of the present utility model, the welding structure 122 is configured as a welding structure 122 formed of polyethylene.

[0028] According to one exemplary embodiment of the present utility model, the welding structure 122 is configured as a welding structure 122 formed of modified polyethylene. In particular, the modified polyethylene is polyethylene modified by maleic anhydride.

[0029] According to one exemplary embodiment of the present utility model, the tube body 11 is configured as a tube body formed of polyhexamethylene adipamide.

[0030] According to one exemplary embodiment of the present utility model, the flange body 121 is configured as a flange structure formed of polyhexamethylene adipamide.

[0031] Therefore, according to an exemplary embodiment of the present invention, the flange body 121 is connected to the tube body 11 by integral injection molding. In this case, the flange body 121 can be constructed as a whole with the tube body 11.

[0032] According to an exemplary embodiment of the present invention, the welding structure 122 is configured as an annular structure embedded in the flange body 121. Those skilled in the art will understand that the welding structure 122 can be configured as a preform.

[0033] According to an exemplary embodiment of the present invention, the welding structure 122 includes an embedded portion 1221 embedded in the flange body 121 and a protruding portion 1222 protruding from the flange body 121. This means that a portion of the welding structure 122 is exposed.

[0034] Preferably, the welded structure 122 is partially embedded in the flange body 121 through a two-color injection molding process.

[0035] like Figure 1 As shown, according to an exemplary embodiment of the present invention, the protruding portion 1222 is radially outwardly biased relative to the embedded portion 1221.

[0036] In addition to the structural improvements mentioned above, using polyhexacrylamide instead of polydodecanoic acid to construct the flange body 121 results in a higher bonding strength between the flange body 121 and the welded structure 122. This is because polyhexacrylamide has a relatively higher extrusion or molding temperature of 270°C-290°C, while polydodecanoic acid has an extrusion or molding temperature of 250°C-270°C. It is also because polyhexacrylamide may have a greater number of bonding sites within its molecular chain.

[0037] Furthermore, the production of polyhexalactam produces lower CO2 emissions, at 3.6 kg per kilogram, compared to 5.8 kg per kilogram for polydodecanolactam. This represents a reduction of 38%.

[0038] Moreover, polyhexamethylene hexanoic acid has a lower cost, thereby reducing the manufacturing cost of fuel valves.

[0039] Although specific embodiments of the present invention are described in detail herein, they are given for illustrative purposes only and should not be construed as limiting the scope of the present invention. Various substitutions, alterations, and modifications may be conceived without departing from the spirit and scope of the present invention.

Claims

1. A fuel valve for a fuel tank, characterized in that The fuel valve (1) comprises: a tube body (11) comprising a fuel barrier structure formed of polyhexamethylene adipamide adapted to radially block the permeation of fuel outward; and an annular flange (12) protruding radially outward from the outer periphery of the tube body (11), the annular flange (12) having a flange body (121) and a welding structure (122) adapted to be welded to the housing (101) of the fuel tank (10), wherein the welding structure (122) is connected to the flange body (121) by being embedded in or coated on the flange body (121).

2. The fuel valve for a fuel tank according to claim 1, wherein the welding structure (122) is configured as a welding structure (122) formed of polyethylene.

3. The fuel valve for a fuel tank according to claim 1, wherein the welding structure (122) is configured as a welding structure (122) formed of modified polyethylene.

4. The fuel valve for a fuel tank according to claim 3, wherein the modified polyethylene is polyethylene modified with maleic anhydride.

5. The fuel valve for a fuel tank according to any one of claims 1 to 4, wherein the tube body (11) is configured as a tube body formed of polyhexamethylene adipamide; and / or the flange body (121) is configured as a flange structure formed of polyhexamethylene adipamide.

6. The fuel valve for a fuel tank according to claim 5, wherein the flange body (121) is connected to the tube body (11) by being integrally injection molded; and / or the welding structure (122) is configured as an annular structure embedded in the flange body (121).

7. The fuel valve for a fuel tank according to claim 6, wherein the welding structure (122) is configured as a preform.

8. The fuel valve for a fuel tank according to any one of claims 1 to 4, 6 to 7, wherein the welding structure (122) includes an embedded portion (1221) embedded in the flange body (121) and a protruding portion (1222) protruding from the flange body (121).

9. The fuel valve for a fuel tank according to claim 8, wherein the welding structure (122) is embedded in the flange body (121) by being two-color injection molded; and / or the protruding portion (1222) is radially outwardly inclined with respect to the embedded portion (1221).

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