A fully conductive fuel filler pipe assembly

Abstract

This invention discloses a fully conductive refueling hose assembly, comprising a refueling hose consisting of a first refueling steel pipe, a refueling hose, and a second refueling steel pipe, and a venting hose consisting of a first venting steel pipe, a venting hose, and a second venting steel pipe; the refueling hose is a conductive refueling hose containing conductive material, and the venting hose is a conductive venting hose containing conductive material; the front end of the first venting steel pipe is welded to the refueling end of the first refueling steel pipe; a first steel bracket is welded to the first refueling steel pipe, and the first steel bracket has a first mounting surface connected to the vehicle body support; a third steel bracket is welded between the second refueling steel pipe and the second venting steel pipe, and the third steel bracket has a third mounting surface for connecting to the fuel tank support; both the first and third mounting surfaces are conductive surfaces, which form an electrical circuit between the fuel tank, the refueling hose, and the vehicle body. This invention can minimize the accumulation and release of static electricity, reduce the risk of fuel combustion, and improve vehicle safety.

Description

Technical Field

[0001] This invention relates to the technical field of vehicle parts, and in particular to a refueling hose assembly used in fuel tanks, specifically a fully conductive refueling hose assembly. Background Technology

[0002] With the rapid development of my country's automotive industry and the continuous improvement of people's living standards, the demand for family cars has also surged. Cars typically use gasoline or diesel fuel and are equipped with fuel tanks. During refueling, fuel is added to the tank through a fuel nozzle and fuel line assembly. In existing technology, the fuel line assembly undergoes surface treatment during manufacturing to improve its wear and corrosion resistance and extend its service life. However, this surface-treated assembly is non-conductive, which can increase the risk of fuel combustion due to static electricity generated during refueling or handling of peripheral parts. Currently, some fuel line assemblies have sections where a portion of the fuel line can form an electrical circuit with the vehicle body. However, because the fuel line contains rubber hoses, it is not yet possible to create an electrical circuit within the fuel tank, preventing the generated static electricity from being conducted to the vehicle body. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a fully conductive fuel filler assembly that can conduct the generated static electricity to the vehicle body, prevent static electricity accumulation, avoid the risk of fuel combustion, and improve vehicle safety.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0005] A fully conductive refueling hose assembly includes a refueling hose and a vent hose. The refueling hose is composed of a first refueling steel pipe, a refueling rubber hose, and a second refueling steel pipe connected in sequence. The vent hose is composed of a first venting steel pipe, a venting rubber hose, and a second venting steel pipe connected in sequence. The refueling rubber hose is a conductive refueling rubber hose containing conductive material, and the venting rubber hose is a conductive venting rubber hose containing conductive material. The front end of the first venting steel pipe is welded to a refueling end formed by expanding the diameter at the front end of the first refueling steel pipe. A first steel bracket is welded to the first refueling steel pipe near the refueling end, and the first steel bracket has a first mounting surface for connecting to the vehicle body support. A third steel bracket is welded between the second refueling steel pipe and the second venting steel pipe, and the third steel bracket has a third mounting surface for connecting to the fuel tank support. Both the first and third mounting surfaces are conductive surfaces without a protective coating, and these conductive surfaces form an electrical circuit between the fuel tank, the refueling hose, and the vehicle body to conduct static electricity generated to the vehicle body.

[0006] To optimize the above technical solution, the specific measures also include:

[0007] The aforementioned refueling end is welded with a threaded ring to prevent fuel spillage during refueling. The threaded ring has an internal thread rolled into it for screwing into the fuel tank cap. The bottom of the threaded ring is formed with a refueling nozzle that allows the nozzle tip of the refueling gun to extend into the refueling end.

[0008] The connection between the above-mentioned refueling end and the first refueling steel pipe forms a tapered cavity with a gradually decreasing diameter and a taper angle of 40°; the central axis of the toothed ring port coincides with the central axis of the refueling end, and there is an eccentricity of 3 mm between the central axis of the refueling nozzle and the central axis of the refueling end; the port of the refueling end is folded outward to form an arc-shaped sealing surface for sealing and positioning with the fuel tank cap, and a layer of fluorocarbon resin adhesive is sprayed on the arc-shaped sealing surface.

[0009] The tail end of the first refueling steel pipe is inserted into the front end of the conductive refueling hose, and the front end of the second refueling steel pipe is inserted into the rear end of the conductive refueling hose. Both the tail end of the first refueling steel pipe and the front end of the second refueling steel pipe are extruded with anti-pull-out protrusions to improve the connection with the conductive refueling hose. Furthermore, both the first and second refueling steel pipes are extruded with limiting protrusions at a distance of 35 mm from the anti-pull-out protrusions to limit the fit with the port of the conductive refueling hose.

[0010] On the outer circumferential surfaces of both ends of the aforementioned conductive refueling hose, at the midpoint between the anti-pull-out protrusion and the limiting protrusion, refueling hose clamps are fitted for tightening.

[0011] The tail end of the first venting steel pipe is inserted into the front port of the conductive venting hose, and the front end of the second venting steel pipe is inserted into the rear port of the conductive venting hose. Both the tail end of the first venting steel pipe and the front port of the second venting steel pipe are extruded with anti-pull-out protrusions to improve the connection with the conductive venting hose. Furthermore, both the first and second venting steel pipes are extruded with positioning protrusions at a distance of 35 mm from the anti-pull-out protrusions to position and engage with the port of the conductive venting hose.

[0012] On the outer circumferential surfaces of both ends of the aforementioned conductive venting hose, at the midpoint between the anti-pull-out protrusion and the positioning protrusion, venting hose clamps are fitted for tightening.

[0013] A second steel bracket is welded between the first refueling steel pipe and the first venting steel pipe to maintain their spatial orientation. The second steel bracket is welded near the tail end of the first refueling steel pipe and the tail end of the first venting steel pipe. A third steel bracket is welded near the front end of the second refueling steel pipe and the front end of the second venting steel pipe. A fourth steel bracket is welded at the middle position of the second venting steel pipe.

[0014] The first, second, third, and fourth steel supports mentioned above are all provided with elongated welding holes to increase the welding area with the steel pipe.

[0015] The tail end of the second refueling steel pipe is extruded with a pipe tail protrusion, and a pressure relief hole for pressure reduction is machined on the second refueling steel pipe at a distance of 46 mm from the pipe tail protrusion; the tail end of the second venting steel pipe is extruded with a reduced diameter arc-shaped nozzle, and an outwardly protruding annular rib is extruded on the second venting steel pipe at a distance of 24 mm from the arc-shaped nozzle.

[0016] Compared with the prior art, the refueling hose of the present invention is a conductive refueling hose containing conductive material, and the vent hose is a conductive vent hose containing conductive material. The conductive refueling hose and the conductive vent hose make the entire refueling hose assembly fully conductive. The first mounting surface of the first steel bracket and the third mounting surface of the third steel bracket are both conductive surfaces. In this way, by utilizing the conductive surfaces, the refueling hose assembly of the present invention can conduct static electricity generated when the car is refueling or when loading and unloading peripheral parts to the vehicle body, minimizing all possible static electricity accumulation and release, thereby avoiding the risk of fuel combustion and achieving the purpose of improving vehicle safety. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another angle;

[0019] Figure 3 This is a cross-sectional view of the refueling end of the present invention;

[0020] Figure 4 yes Figure 1 A schematic diagram of the first steel support structure in direction I;

[0021] Figure 5 yes Figure 1 Schematic diagram of the II-axis structure of the third steel support in the middle;

[0022] Figure 6 This is a schematic diagram of the connection structure of the conductive refill hose of the present invention;

[0023] Figure 7 This is a schematic diagram of the connection structure of the conductive and ventilated hose of the present invention;

[0024] Figure 8 This is a schematic diagram of the tail end structure of the second refueling steel pipe of the present invention;

[0025] Figure 9 This is a schematic diagram of the tail end structure of the second venting steel pipe of the present invention. Detailed Implementation

[0026] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0027] Figures 1 to 9 This is a schematic diagram of the structure of the present invention.

[0028] The attached figures are labeled as follows: taper angle α, welding elongated hole K, conical cavity Q, eccentricity S, anti-pull-out protrusion T1, limiting protrusion T2, anti-pull-out protrusion Z1, positioning protrusion Z2, refueling pipe 1, first refueling steel pipe 11, refueling end 11a, arc-shaped sealing surface 11b, conductive refueling hose 12, second refueling steel pipe 13, pipe tail protrusion 13a, pressure relief hole 13b, threaded ring 14, internal thread 14a, refueling nozzle 14b, vent pipe 2, first venting steel pipe 21, conductive venting hose 22, second venting steel pipe 23, arc-shaped nozzle 23a, annular rib 23b, first steel bracket 3, first assembly surface 3a, second steel bracket 4, third steel bracket 5, third assembly surface 5a, fourth steel bracket 6, refueling pipe clamp 7, vent pipe clamp 8.

[0029] Traditional fuel filler hose assemblies require surface treatment. After surface treatment, the fuel filler hose assembly is insulated from the vehicle body. This poses a risk of fuel combustion due to static electricity generated during refueling or when loading or unloading surrounding parts.

[0030] This invention provides a fully conductive fuel filler pipe assembly that minimizes all possible static electricity buildup and release, thereby avoiding the risk of fuel combustion and improving vehicle safety. Figure 1 and Figure 2As shown, the all-conductive refueling hose assembly includes a refueling hose 1 and a vent hose 2. The refueling hose 1 consists of two refueling steel pipes and a refueling hose connecting them. The first refueling steel pipe 11 is located at the front, and the second refueling steel pipe 13 is located at the rear. The front end of the first refueling steel pipe 11 is enlarged to form a refueling end 11a. The refueling end 11a is used to accommodate the refueling nozzle for convenient fuel filling. The vent hose 2 consists of two venting steel pipes and a vent hose connecting them. The first venting steel pipe 21 is located at the front, and the second venting steel pipe 23 is located at the rear. The vent hose 2 is used to vent the gas in the fuel tank during refueling, allowing the fuel and gas to travel through different pipes. The front end of the first venting steel pipe 21, i.e., the venting end of the vent hose 2, is welded to the refueling end 11a of the first refueling steel pipe 11. The key feature of this invention is that the refueling hose is a conductive refueling hose 12 containing conductive material, and the vent hose is a conductive vent hose 22 containing conductive material. The conductive refueling hose 12 and the conductive vent hose 22 make the entire refueling hose assembly a conductive body. A first steel bracket 3 is welded to the first refueling steel pipe 11 near the refueling end 11a, and the first steel bracket 3 is used to fix the refueling hose assembly to the vehicle body. A third steel bracket 5 is welded between the second refueling steel pipe 13 and the second vent steel pipe 23. The third steel bracket 5 not only provides a fixing and supporting function, but also ensures that the spatial position between the second refueling steel pipe 13 and the second vent steel pipe 23 remains unchanged. Figure 4 and Figure 5 As can be seen, the first steel bracket 3 of the present invention has a first mounting surface 3a, which is used to contact and cooperate with the vehicle body support during installation. The third steel bracket 5 has a third mounting surface 5a, which is used to contact and cooperate with the fuel tank support. Both the first mounting surface 3a and the third mounting surface 5a are conductive surfaces without a protective coating, i.e., the surface is untreated. This conductive surface forms an electrical circuit between the fuel tank, the refueling pipe, and the vehicle body to conduct the generated static electricity to the vehicle body. The first refueling steel pipe 11 of the present invention is connected to the vehicle body through the first steel bracket 3, thus forming a circuit between the vehicle body and the refueling pipe. In particular, the conductive refueling hose 12 and the conductive vent hose 22 are both conductive, forming a circuit between the vehicle body and the fuel tank. Thus, the entire refueling system is fully conductive. When static electricity is generated, it can be conducted to the vehicle body through the refueling pipe assembly.

[0031] In the embodiments, as shown Figure 3 As shown, a threaded ring 14 is welded into the refueling end 11a to prevent fuel spillage during refueling. The threaded ring 14 has an internal thread 14a rolled and formed near the upper end for screwing into the fuel tank cap. The bottom of the threaded ring 14 has a refueling nozzle 14b formed therein, which allows the nozzle tip of the refueling gun to extend into the refueling end 11a. In this way, the threaded ring 14 can be used to prevent fuel spillage.

[0032] In this embodiment, a tapered cavity Q with a gradually decreasing diameter is formed between the refueling end 11a and the first refueling steel pipe 11, and the taper angle α of the tapered cavity Q is 40°. The central axis of the port of the threaded ring 14 coincides with the central axis of the refueling end 11a, and there is an eccentricity S of 3 mm between the central axis of the refueling nozzle 14b and the central axis of the refueling end 11a. The port of the refueling end 11a is folded outward to form an arc-shaped sealing surface 11b for sealing and positioning with the fuel tank cap, and a layer of fluorocarbon resin adhesive is sprayed on the arc-shaped sealing surface 11b. The fluorocarbon resin adhesive layer can increase the sealing performance between the fuel tank cap and the refueling end 11a.

[0033] In this embodiment, the tail end of the first refueling steel pipe 11 is inserted into the front port of the conductive refueling hose 12, and the front end of the second refueling steel pipe 13 is inserted into the rear port of the conductive refueling hose 12. Figure 6 As shown, the tail end of the first refueling steel pipe 11 and the front end of the second refueling steel pipe 13 of the present invention are both extruded with anti-pull-out protrusions T1 to improve the firmness of the connection between the refueling steel pipe and the conductive refueling hose 12. At the same time, in order to prevent the refueling steel pipe from being inserted too deeply, the first refueling steel pipe 11 and the second refueling steel pipe 13 are both extruded with limiting protrusions T2 at a distance of 35 mm from the anti-pull-out protrusions for limiting the connection with the end of the conductive refueling hose 12.

[0034] In this embodiment, in order to further prevent the refueling steel pipe from falling off the conductive refueling hose 12, the present invention also fits and installs refueling hose clamps 7 on the outer peripheral surfaces of both ends of the conductive refueling hose 12 to tighten the refueling steel pipe. The refueling hose clamps 7 are preferably installed at the middle position between the anti-pull-out protrusion T1 and the limiting protrusion T2.

[0035] In this embodiment, the tail end of the first venting steel pipe 21 is inserted into the front port of the conductive venting hose 22, and the front end of the second venting steel pipe 23 is inserted into the rear port of the conductive venting hose 22. Figure 7 As shown, both the tail end of the first venting steel pipe 21 and the front end of the second venting steel pipe 23 are extruded with anti-pull-out protrusions Z1 to improve the firmness of the connection between the venting steel pipe and the conductive venting hose 22. Similarly, to prevent the venting steel pipe from being inserted too deeply, both the first venting steel pipe 21 and the second venting steel pipe 22 are extruded with positioning protrusions Z2 at a distance of 35 mm from the anti-pull-out protrusions for positioning and engaging with the port of the conductive venting hose 22.

[0036] In this embodiment, in order to further prevent the venting steel pipe from falling out of the conductive venting hose 22, venting hose clamps 8 for tightening are fitted on the outer peripheral surfaces of both ends of the conductive venting hose 22 of the present invention, so as to tighten the venting steel pipe by means of the venting hose clamps 8. The fitting position of the venting hose clamps 8 is preferably located at the middle position between the anti-pull-out protrusion Z1 and the positioning protrusion Z2.

[0037] In this embodiment, a second steel bracket 4 for maintaining the spatial orientation of the first refueling steel pipe 11 and the first venting steel pipe 21 is welded together. The second steel bracket 4 is welded near the tail end of the first refueling steel pipe 11 and the tail end of the first venting steel pipe 12. The aforementioned third steel bracket 5 is welded near the front end of the second refueling steel pipe 13 and the front end of the second venting steel pipe 23; and a fourth steel bracket 6 is welded at the middle position of the second venting steel pipe 23.

[0038] This invention uses four steel brackets to fix the refueling pipe assembly to the vehicle, which ensures the stability of the refueling pipe assembly while the vehicle is in motion, and also keeps the spatial positions of the refueling pipe and the vent pipe unchanged.

[0039] In the embodiments, the first steel support 3, the second steel support 4, the third steel support 5, and the fourth steel support 6 of the present invention are all provided with elongated welding holes K for increasing the welding area with the steel pipe. When the steel support is welded to the steel pipe, it is not only welded along the periphery of the contact surface, but the elongated welding holes K are also used to increase the welding length between the steel support and the steel pipe, ensuring the firmness of the connection between the steel support and the steel pipe.

[0040] In the embodiments, as shown Figure 8 As shown, the tail end of the second refueling steel pipe 13 is extruded with a pipe tail protrusion 13a. A pressure relief hole 13b is machined on the second refueling steel pipe 13 at a distance of 46 mm from the pipe tail protrusion. The pressure relief hole 13b can reduce the pressure inside the refueling pipe during refueling, preventing fuel from impacting the fuel tank. Figure 9 As shown, the tail end of the second venting steel pipe 23 of the present invention is extruded with a reduced diameter arc-shaped nozzle 23a, and the second venting steel pipe 23 is extruded with an outwardly protruding annular rib 23b at a distance of 24 mm from the arc-shaped nozzle.

[0041] The first refueling steel pipe of this invention has a length of 406.3 mm along its centerline, the conductive refueling hose 12 has a length of 163.3 mm along its centerline, and the second refueling steel pipe 13 has a length of 370 mm along its centerline. The first venting steel pipe 21 has a length of 390.8 mm along its centerline, the conductive venting hose 22 has a length of 168.8 mm along its centerline, and the second venting steel pipe 23 has a length of 445 mm along its centerline.

[0042] The preferred embodiments of the present invention have been described, and various changes or modifications made by those skilled in the art will not depart from the scope of the present invention.

Claims

1. A fully conductive refueling hose assembly, comprising a refueling hose (1) and a venting hose (2); wherein the refueling hose (1) is composed of a first refueling steel pipe (11), a refueling rubber hose, and a second refueling steel pipe (13) connected in sequence; wherein the venting hose (2) is composed of a first venting steel pipe (21), a venting rubber hose, and a second venting steel pipe (23) connected in sequence; characterized in that: The refueling hose is a conductive refueling hose (12) containing conductive material, and the vent hose is a conductive vent hose (22) containing conductive material; the front end of the first vent steel pipe (21) is welded and connected to the refueling end (11a) formed by the expansion of the front end of the first refueling steel pipe (11); a first steel bracket (3) is welded on the first refueling steel pipe (11) near the refueling end (11a), and the first steel bracket (3) has a first mounting surface (3a) for connecting with the vehicle body support; a third steel bracket (5) is welded and connected between the second refueling steel pipe (13) and the second vent steel pipe (23), and the third steel bracket (5) has a third mounting surface (5a) for connecting with the fuel tank support; the first mounting surface (3a) and the third mounting surface (5a) are both conductive surfaces without protective coating, and the conductive surfaces form an electrical circuit between the fuel tank, the refueling hose and the vehicle body to conduct the generated static electricity to the vehicle body. The refueling end (11a) is welded with a threaded ring (14) for preventing fuel spillage during refueling. The threaded ring (14) has an internal thread (14a) rolled and formed for screwing with the fuel tank cap. The bottom of the threaded ring (14) is formed with a refueling nozzle (14b) that allows the nozzle tip of the refueling gun to extend into the refueling end (11a). A tapered cavity (Q) with a gradually decreasing diameter is formed between the refueling end (11a) and the first refueling steel pipe (11), and the taper angle (α) of the tapered cavity (Q) is 40°; the central axis of the port of the toothed ring (14) coincides with the central axis of the refueling end (11a), and there is an eccentricity (S) of 3 mm between the central axis of the refueling nozzle (14b) and the central axis of the refueling end (11a); the port of the refueling end (11a) is folded outward to form an arc-shaped sealing surface (11b) for sealing and positioning with the fuel tank cap, and a layer of fluorocarbon resin adhesive is sprayed on the arc-shaped sealing surface (11b); The tail end of the second refueling steel pipe (13) is extruded with a pipe tail protrusion (13a), and a pressure relief hole (13b) for pressure reduction is machined on the second refueling steel pipe (13) at a distance of 46 mm from the pipe tail protrusion; the tail end of the second venting steel pipe (23) is extruded with a reduced diameter arc-shaped nozzle (23a), and an outwardly protruding annular rib (23b) is extruded on the second venting steel pipe (23) at a distance of 24 mm from the arc-shaped nozzle.

2. The fully conductive refueling pipe assembly according to claim 1, characterized in that: The tail end of the first refueling steel pipe (11) is inserted into the front port of the conductive refueling hose (12), and the front end of the second refueling steel pipe (13) is inserted into the rear port of the conductive refueling hose (12). The tail port of the first refueling steel pipe (11) and the front port of the second refueling steel pipe (13) are both extruded with anti-pull-out protrusions (T1) to improve the connection with the conductive refueling hose (12). Furthermore, the first refueling steel pipe (11) and the second refueling steel pipe (13) are both extruded with limiting protrusions (T2) at a distance of 35 mm from the anti-pull-out protrusions to limit the fit with the port of the conductive refueling hose (12).

3. The fully conductive refueling hose assembly according to claim 2, characterized in that: On the outer circumferential surfaces of both ends of the conductive oiling hose (12), oiling hose clamps (7) are fitted and installed at the middle position between the anti-pull-out protrusion (T1) and the limiting protrusion (T2) for tightening.

4. The fully conductive refueling pipe assembly according to claim 3, characterized in that: The tail end of the first venting steel pipe (21) is inserted into the front port of the conductive venting hose (22), and the front end of the second venting steel pipe (23) is inserted into the rear port of the conductive venting hose (22). The tail end of the first venting steel pipe (21) and the front port of the second venting steel pipe (23) are both extruded with anti-pull-out protrusions (Z1) to improve the connection with the conductive venting hose (22). Furthermore, the first venting steel pipe (21) and the second venting steel pipe (22) are both extruded with positioning protrusions (Z2) at a distance of 35 mm from the anti-pull-out protrusions to position and cooperate with the port of the conductive venting hose (22).

5. The fully conductive refueling pipe assembly according to claim 4, characterized in that: On the outer circumferential surfaces of both ends of the conductive venting hose (22), venting hose clamps (8) for tightening are fitted and installed at the middle position between the anti-pull-out protrusion (Z1) and the positioning protrusion (Z2).

6. The fully conductive refueling pipe assembly according to claim 5, characterized in that: A second steel bracket (4) is welded between the first refueling steel pipe (11) and the first venting steel pipe (21) to maintain their spatial orientation. The second steel bracket (4) is welded near the tail end of the first refueling steel pipe (11) and the tail end of the first venting steel pipe (21). The third steel bracket (5) is welded near the front end of the second refueling steel pipe (13) and the front end of the second venting steel pipe (23). A fourth steel bracket (6) is welded at the middle position of the second venting steel pipe (23).

7. The fully conductive refueling pipe assembly according to claim 6, characterized in that: The first steel support (3), the second steel support (4), the third steel support (5) and the fourth steel support (6) are all provided with welding elongated holes (K) to increase the welding area with the steel pipe.

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