A flow guide assembly, fuel filler pipe assembly, and vehicle

Abstract

The utility model provides a kind of flow guide assembly, fuel filler pipe assembly and vehicle, the both ends of flow guide assembly are respectively equipped with plug-in interface and flow guide port, the inside of flow guide assembly is formed into the flow guide channel of taper between plug-in interface from the flow area of small flow guide port, taper design can effectively reduce the turbulence when oil liquid passes, make fuel flow more stable.In the inner wall of flow guide channel, a plurality of protruding support blocks are provided, which provide stable radial support for the external refueling device inserted into the flow guide channel, and form an exhaust gap between the external refueling device and the inner wall of the flow guide channel, effectively preventing the oil gas in the fuel tank from flowing back to the external refueling device, and avoiding the premature termination of the refueling process due to the oil gas interference causing the oil full signal to be triggered incorrectly.

Description

Technical Field

[0001] This utility model relates to the field of vehicle parts technology, and further to a flow guide component, a refueling pipe assembly, and a vehicle. Background Technology

[0002] In current automotive fuel filling systems, a metal guide assembly is typically welded or installed inside the fuel filler neck to guide fuel smoothly into the fuel tank. The design purpose of this guide assembly is to use its structure to direct the high-speed injected fuel into the fuel tank, reducing impact.

[0003] However, this design has revealed many problems in practical applications: Typical fuel filler necks are designed as conical structures. When refueling with a nozzle, fuel is ejected at high speed from the nozzle and enters the conical filler neck. The guiding effect of the conical structure itself is often limited, failing to effectively mitigate the impact of the fuel. The high-speed fuel flow still interacts violently with the inner wall of the tank and any residual fuel that may be present. This impact causes the fuel flow to become turbulent, creating strong currents. Fuel splashes inside the tank, making the refueling process unstable and potentially even spilling out of the filler neck. Simultaneously, this violent agitation accelerates fuel evaporation, leading to a large amount of fuel vapor escaping and wasting energy. Furthermore, the large amount of fuel vapor escaping can easily clog the breather hole on the nozzle, causing the sensor inside the nozzle to misjudge that the tank is full, automatically triggering the nozzle to shut off and stop refueling. Each time the nozzle shuts off, it needs to be pressed again, repeatedly interrupting the refueling process and prolonging the refueling time.

[0004] Secondly, the metal aerodynamic components commonly used in existing technologies also have inherent drawbacks. On the one hand, metal has a high density, and using metal aerodynamic components undoubtedly increases the vehicle's weight.

[0005] In summary, the existing fuel filler neck and its metal guide components not only fail to effectively solve the turbulence problem during refueling, but also bring drawbacks such as unstable refueling, increased vehicle weight, and safety hazards due to structural limitations and material selection, and a more optimized solution is urgently needed. Utility Model Content

[0006] In view of the lack of the above-mentioned related technologies, the purpose of this disclosure is to provide a flow guiding component, a refueling pipe assembly, and a vehicle to solve the problems in the related technologies. To achieve the above objective, this utility model adopts the following technical solution:

[0007] A flow guiding assembly includes: a flow guiding body having a connector and a flow guiding port, the connector being disposed at one end of the flow guiding body for detachably connecting an external refueling device; the flow guiding port being disposed at the other end of the flow guiding body and communicating with a vehicle's fuel tank; a flow guiding channel being formed inside the flow guiding body between the connector and the flow guiding port, the flow area of ​​the connector being larger than the flow area of ​​the flow guiding port, and the flow guiding channel near the flow guiding port having a tapered structure; and at least one support block disposed on the inner wall of the flow guiding body, the support block extending in the same direction as the flow guiding channel, the support block protruding towards the central axis of the flow guiding channel to provide radial support for the external refueling device and to space the external refueling device from the inner wall of the flow guiding body.

[0008] In some technical solutions, a certain distance is left between the two ends of the support block and the insertion interface and the flow guide, respectively.

[0009] In some technical solutions, the air guide body is also provided with an air outlet.

[0010] In some technical solutions, the distance between the air outlet and the guide port is less than the distance between the air outlet and the insertion interface.

[0011] In some technical solutions, the flow guide body is made of plastic material.

[0012] In some technical solutions, the flow guiding body includes a first main body segment and a second main body segment that are interconnected. The opening of the first main body segment is the insertion interface, and the opening of the second main body segment is the flow guiding port. The inner diameter of the first main body segment gradually decreases from the insertion interface towards the second main body segment, and the inner diameter of the second main body segment gradually decreases from the connection between the second main body segment and the first main body segment towards the flow guiding port. The inner wall of the first main body segment is inclined, and the inclination angle of the inner wall of the first main body segment is set such that when the external refueling device is inserted into the insertion interface, the angle between the axis of the external refueling device and the central axis of the flow guiding channel is less than 10°.

[0013] This utility model also provides a refueling pipe assembly, including the above-mentioned flow guiding component and refueling pipe; the flow guiding component is installed inside the refueling pipe.

[0014] In some technical solutions, a plurality of first positioning blocks are provided on the outer wall of the flow guide body near the insertion interface. The first positioning blocks protrude radially from the outer wall of the flow guide body. The inner wall of the refueling pipe is provided with a first positioning groove that cooperates with the first positioning blocks.

[0015] In some technical solutions, a plurality of second positioning blocks are provided on the outer wall of the flow guide body near the flow guide port. The second positioning blocks protrude radially from the outer wall of the flow guide body. The inner wall of the refueling pipe is provided with a second positioning groove that cooperates with the second positioning blocks. The height of the second positioning block is less than the height of the first positioning block.

[0016] This utility model also discloses a vehicle, including the above-mentioned flow guiding component or the above-mentioned refueling pipe assembly.

[0017] Compared with the prior art, the present invention can bring the following beneficial effects:

[0018] 1. The flow guiding component provided by this utility model adopts a tapered flow guiding channel design. The flow area of ​​the flow guiding channel near the flow guiding port gradually decreases, which helps to reduce turbulence of the oil about to enter the oil tank. Multiple support blocks are provided on the inner wall of the flow guiding body. The support blocks protrude towards the central axis of the flow guiding channel. The support blocks can provide radial support for the external refueling device (such as a refueling gun) inserted into the flow guiding channel from the insertion interface. Secondly, the support blocks create a gap between the outer wall of the external refueling device and the inner wall of the flow guiding body. This gap can effectively discharge the oil vapor accumulated in the oil tank during the refueling process, prevent the droplets generated by splashing from flooding the breather hole of the refueling gun, and avoid premature shut-off due to misjudging "full";

[0019] 2. The present invention also has vent holes on the main body of the flow guide. When refueling, these vent holes can discharge the oil vapor inside the fuel tank to the external environment, maintain the pressure balance inside and outside the fuel tank, avoid fuel intake obstruction caused by the pressure difference between inside and outside, and ensure that the fuel can flow smoothly into the fuel tank.

[0020] 3. The guide port on the guide body provided by this utility model is inclined towards the fuel tank. When fuel flows out through the guide port, the inclined guide port can guide the fuel to slide into the fuel tank along the inner wall of the fuel tank in an approximately tangential direction. This design of flowing along the wall can effectively reduce oil splashing and air bubbles.

[0021] 4. To ensure the flow guiding component is securely installed within the refueling pipeline and is not easily misaligned, the flow guiding body provided by this utility model is provided with a first positioning block and a second positioning block protruding from the outer wall of the flow guiding body. A first positioning groove and a second positioning groove matching the first and second positioning blocks are provided on the inner wall of the refueling pipeline. When the flow guiding body is installed in the refueling pipeline, the positioning blocks will firmly engage with the positioning grooves, thereby reliably fixing the flow guiding body in place and effectively preventing unnecessary rotation during use. Simultaneously, the height of the second positioning block is less than the height of the first positioning block, effectively preventing the flow guiding port and connector from being installed backwards during the installation process.

[0022] 5. The airflow guide component provided by this utility model is made of plastic material. Compared with metal material, plastic has a lower density, which can significantly reduce the overall weight of the vehicle. Attached Figure Description

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0024] Figure 1 A schematic diagram of the flow guiding component provided by this utility model;

[0025] Figure 2 A schematic diagram of the flow guiding component provided by this utility model from another perspective;

[0026] Figure 3 A cross-sectional view of the flow guiding component provided by this utility model;

[0027] Figure 4 A schematic diagram of the flow guiding component provided by this utility model from another perspective;

[0028] Figure 5 A cross-sectional view of the flow guiding component provided by this utility model from another perspective.

[0029] Figure Labels

[0030] 1—Flow guide body; 11—First main body section; 12—Second main body section; 101—Insert interface; 102—Flow guide port; 103—Air outlet; 104—Flow guide channel; 13—Support block; 14—First positioning block; 15—Second positioning block. Detailed Implementation

[0031] The present invention will be further described below with reference to specific embodiments, but these embodiments are merely exemplary and do not constitute any limitation on the scope of the present invention. Those skilled in the art should understand that various improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

[0032] This utility model provides a vehicle fuel diversion assembly, including a diversion body 1, combined with... Figures 1-5As shown, the flow guiding body 1 has two openings at both ends. One opening is a connector 101 for connecting external refueling equipment such as a fuel nozzle. The other opening is a flow guide port 102 with a smaller flow area than the connector 101. The flow guide port 102 is connected to the vehicle's fuel tank. A flow guiding channel 104 is formed inside the flow guiding body 1 between the connector 101 and the flow guide port 102. The flow guiding channel 104 is generally or at least partially tapered. For example, the flow guiding channel 104 is generally tapered, meaning it gradually decreases in size from the connector 101 (large flow area) to the flow guide port 102 (small flow area). For example, the structure of the flow guiding body 1 is also generally tapered. The flow guiding body 1 adopts a tapered structure, and the diameter of the connector 101 matches the size of various gasoline fuel nozzles, while the diameter of the connector 101 is smaller than that of diesel fuel nozzles to prevent accidental insertion of the diesel fuel nozzle. For example, the flow channel 104 is at least partially tapered, and the flow channel 104 is tapered only on the side near the flow port 102.

[0033] When the fuel nozzle is inserted into the flow guide body 1 through the insertion port 101, the fuel flows through the gradually narrowing flow guide channel 104, and the fuel flow rate can increase gradually, avoiding the step change in flow rate caused by abrupt changes in cross-section, thereby suppressing the generation of turbulence.

[0034] For example, the tapering structure of the flow channel 104 and the flow guide body 1 can be an arc tapering structure or a straight tapering structure.

[0035] In some implementations, such as Figure 3 and Figure 5 The flow guiding body 1 includes a first main body segment 11 and a second main body segment 12 that are connected, and the two together form the flow guiding channel 104. The opening of the first main body segment 11 is the insertion interface 101, and the opening of the second main body segment 12 is the flow guiding port 102. For example, the inner diameter of the first main body segment 11 gradually decreases from the insertion interface 101 towards the second main body segment 12, and the inner wall of the first main body segment 11 is inclined. The inclination angle of the inner wall of the first main body segment 11 should satisfy the following: when the fuel nozzle is inserted into the insertion interface 101, the angle between the axis of the fuel nozzle and the central axis of the flow guiding channel 104 is less than 10°, which facilitates the smooth entry of oil into the fuel tank. The inner diameter of the second main body segment 12 gradually decreases from the connection point between the second main body segment 12 and the first main body segment 11 towards the flow guiding port 102.

[0036] For example, such as Figure 3 and 5As shown, the first main body segment 11 is a straight tapering structure, and the second main body segment 12 is an arc tapering structure.

[0037] In some embodiments, the flow guide 102 is inclined toward the oil tank, such as... Figure 1-3 As shown, exemplarily, the guide port 102 is inclined downward at an acute angle between the plane and the vertical plane. Compared with the outlet of the guide component in the prior art, which is usually set with a flat opening, the inclined guide port 102 in this embodiment can guide the fuel to slide into the inner wall of the fuel tank in an approximately tangential direction, forming a stable wall-adhering flow and reducing oil splashing and bubble generation.

[0038] In some implementations, such as Figure 3-5 As shown, at least one support block 13 is also provided on the inner wall of the flow guiding body 1, and the support block 13 protrudes toward the central axis of the flow guiding channel 104. Exemplarily, the extending direction of the support block 13 is the same as the extending direction of the flow guiding channel 104, and a certain distance is left between the two ends of the support block 13 and the insertion interface 101 and the flow guiding port 102, respectively.

[0039] For example, the support block 13 is provided on the inner wall of both the first main body segment 11 and the second main body segment 12. For example, the support block 13 in the first main body segment 11 and the second main body segment 12 is arranged in a continuous form, and the two ends of the support block 13 are respectively separated from the insertion interface 101 and the guide port 102 by a certain distance.

[0040] The fuel nozzle is equipped with a breather hole (also known as a self-sealing hole), which is connected to the self-sealing chamber inside the nozzle via an air guide tube. During normal refueling, fuel flows at high speed through the internal channel of the fuel nozzle. Based on the Venturi effect, a stable negative pressure is generated and maintained within the self-sealing chamber. This negative pressure acts on the diaphragm within the self-sealing chamber, causing the diaphragm to overcome the preload force of the return spring and keep the valve in the open position, allowing fuel to continuously inject into the fuel tank. As the fuel level in the fuel tank gradually rises and eventually submerges the breather hole, the path for external air to enter the self-sealing chamber through the breather hole is blocked by the fuel. This prevents the self-sealing chamber from receiving further external air to maintain the original negative pressure. The negative pressure weakens to the point where it is insufficient to counteract the spring force of the return spring, causing the diaphragm to return to its original position and move the connected valve to the closed position, thereby cutting off the fuel supply to the fuel nozzle and automatically triggering the fuel nozzle to shut off, stopping refueling.

[0041] When the fuel nozzle is inserted into the flow channel 104 through the connector 101, the support block 13 provides radial support to the fuel nozzle. Simultaneously, it separates the fuel nozzle from the inner wall of the flow body 1. Specifically, the outer wall of one side of the fuel nozzle and the inner wall of the flow body 1 form a non-contact fit through the support block 13, creating a gap between them. During refueling, the fuel vapor in the tank needs to be expelled; otherwise, increased internal pressure will hinder refueling. This gap serves as an auxiliary venting channel, allowing gas to escape from the tank and preventing gas accumulation. If the gap is completely closed, meaning the fuel nozzle is completely flush with the inner wall of the flow body 1, fuel vapor may escape through the vent, causing the fuel nozzle to misinterpret as "full" and shut off.

[0042] For example, the support block 13 is disposed on the inner wall of the flow guide body 1 corresponding to the breathing hole on the refueling gun.

[0043] For example, when multiple support blocks 13 are provided, they are arranged at intervals to achieve uniform support.

[0044] In some implementations, such as Figure 2 , Figure 3 and Figure 5 As shown, the guide body 1 is also provided with an air outlet 103. The air outlet 103 is designed to provide a channel for the discharge of oil and gas, so that the oil and gas in the fuel tank can be smoothly discharged from the fuel tank as the liquid level rises. In this way, the inside and outside of the fuel tank can be kept in a relatively balanced state or the internal pressure of the fuel tank can not be too high, ensuring that the fuel can flow in smoothly.

[0045] For example, the air outlet 103 is disposed in the middle of the flow guide body 1.

[0046] For example, the air outlet 103 is disposed on the flow guide body 1 near the flow guide port 102, that is, the distance between the air outlet 103 and the insertion interface 101 is greater than the distance between the air outlet 103 and the flow guide port 102.

[0047] For example, the vent 103 is disposed on the inner wall of the second main body section 12.

[0048] After the fuel nozzle is inserted into the flow guide body 1 through the insertion port 101, the outlet of the fuel nozzle is positioned beyond the air outlet 103.

[0049] For example, the air outlet 103 is disposed on the inner wall of the flow guide body 1 where the support block 13 is located.

[0050] For example, when the support blocks 13 in the first main body segment 11 and the second main body segment 12 are arranged in a continuous form, the air outlet 103 provided in the second main body segment 12 structurally cuts off the support block 13 laterally.

[0051] In some embodiments, the aerator body is made of plastic. Plastic has a much lower density than metal, and using plastic aerator components can significantly reduce the overall weight of the vehicle. Furthermore, plastic is an insulator compared to metal. In fuel systems, plastic materials can reduce the risk of static electricity.

[0052] This embodiment also provides a refueling pipe assembly, including the flow guiding component and the refueling pipe, wherein the refueling pipe is connected to the refueling port on the vehicle, and the flow guiding component is installed inside the refueling pipe.

[0053] The flow guiding assembly includes: a flow guiding body 1 with openings at both ends, one opening being a connector 101 for connecting to external fuel delivery equipment such as a fuel nozzle, and the other opening being a flow guiding port 102 communicating with the vehicle's fuel tank. The flow area of ​​the connector 101 is larger than that of the flow guiding port 102, and the flow guiding channel 104 is generally or at least partially tapered. For example, the flow guiding channel 104 is generally tapered, meaning it gradually decreases in size from the connector 101 with its large flow area to the flow guiding port 102 with its small flow area. For example, the structure of the flow guiding body 1 is also generally tapered. The flow guiding body 1 adopts a generally tapered structure, the diameter of the connector 101 matches the size of various gasoline fuel nozzles, and the diameter of the connector 101 is smaller than that of diesel fuel nozzles to prevent accidental insertion of the diesel fuel nozzle. For example, the flow channel 104 is at least partially tapered, and the flow channel 104 is tapered only on the side near the flow port 102.

[0054] When the fuel nozzle is inserted into the flow guide body 1 through the insertion port 101, the fuel flows through the gradually narrowing flow guide channel 104, and the fuel flow rate can increase gradually, avoiding the step change in flow rate caused by abrupt changes in cross-section, thereby suppressing the generation of turbulence.

[0055] For example, the tapering structure of the flow channel 104 and the flow guide body 1 can be an arc tapering structure or a straight tapering structure.

[0056] In some embodiments, the flow guiding body 1 includes a first main body segment 11 and a second main body segment 12 that are connected, and the two together form the flow guiding channel 104. The opening of the first main body segment 11 is the insertion interface 101, and the opening of the second main body segment 12 is the flow guiding port 102. Exemplarily, the inner diameter of the first main body segment 11 gradually decreases from the insertion interface 101 towards the second main body segment 12, and the inner wall of the first main body segment 11 is inclined. The inclination angle of the inner wall of the first main body segment 11 should satisfy the following: when the fuel nozzle is inserted into the insertion interface 101, the angle between the axis of the fuel nozzle and the central axis of the flow guiding channel 104 is less than 10°, which facilitates the smooth entry of oil into the fuel tank. The inner diameter of the second main body segment 12 gradually decreases from the connection point between the second main body segment 12 and the first main body segment 11 towards the flow guiding port 102.

[0057] For example, such as Figure 3 and 5 As shown, the first main body segment 11 is a straight tapering structure, and the second main body segment 12 is an arc tapering structure.

[0058] In some embodiments, the flow guide 102 is inclined toward the oil tank, such as... Figure 1-3 As shown. Exemplarily, the flow guide 102 is inclined downward at an acute angle between the plane and the vertical plane. Compared with the conventional flow guide assembly, which usually has a flat outlet, the inclined flow guide 102 in this embodiment can guide fuel to slide into the inner wall of the fuel tank in an approximately tangential direction, forming a stable wall-adhering flow and reducing fuel splashing and bubble generation.

[0059] In some implementations, such as Figure 3-5 As shown, at least one support block 13 is also provided on the inner wall of the flow guiding body 1, and the support block 13 protrudes toward the central axis of the flow guiding channel 104. Exemplarily, the extending direction of the support block 13 is the same as the extending direction of the flow guiding channel 104, and a certain distance is left between the two ends of the support block 13 and the insertion interface 101 and the flow guiding port 102, respectively.

[0060] For example, the support block 13 is provided on the inner wall of both the first main body segment 11 and the second main body segment 12. For example, the support block 13 in the first main body segment 11 and the second main body segment 12 is arranged in a continuous form, and the two ends of the support block 13 are respectively separated from the insertion interface 101 and the guide port 102 by a certain distance.

[0061] The fuel nozzle is equipped with a breather hole (self-sealing hole). When the fuel level in the tank is close to full, fuel enters the self-sealing device inside the fuel nozzle through the self-sealing hole. The self-sealing device automatically triggers the fuel nozzle to stop refueling upon sensing the presence of fuel. Secondly, the breather hole also balances the air pressure inside the tank. During refueling, the fuel level in the tank increases, compressing the gas and increasing the pressure. The breather hole allows some air to escape, preventing excessive pressure inside the tank. When the fuel nozzle is inserted into the flow channel 104 through the insertion port 101, the support block 13 provides radial support to the fuel nozzle. Simultaneously, it creates a gap between the fuel nozzle and the inner wall of the flow body 1, meaning the outer wall of one side of the fuel nozzle and the inner wall of the flow body 1 form a non-contact fit. During refueling, the fuel vapor in the tank needs to be expelled; otherwise, the increased internal pressure will hinder refueling. This gap serves as an auxiliary exhaust channel, allowing gas to escape from the fuel tank and preventing gas accumulation. If the gap is completely closed, meaning the fuel nozzle is completely flush against the inner wall of the guide body 1, fuel gas may escape through the breather hole, causing the fuel nozzle to misjudge as "full" and shut off.

[0062] For example, the support block 13 is disposed on the inner wall of the flow guide body 1 corresponding to the breathing hole on the refueling gun.

[0063] For example, when multiple support blocks 13 are provided, they are arranged at intervals to achieve uniform support.

[0064] In some embodiments, the guide body 1 is further provided with a vent 103, which is designed to provide a channel for the discharge of oil and gas, allowing the oil and gas in the fuel tank to be smoothly discharged from the fuel tank as the liquid level rises. In this way, the inside and outside of the fuel tank can be kept in a relatively balanced state, or the internal pressure of the fuel tank can be prevented from becoming too high, ensuring that fuel can flow in smoothly.

[0065] For example, the air outlet 103 is disposed in the middle of the flow guide body 1.

[0066] For example, the air outlet 103 is disposed on the flow guide body 1 near the flow guide port 102, that is, the distance between the air outlet 103 and the insertion interface 101 is greater than the distance between the air outlet 103 and the flow guide port 102.

[0067] For example, the vent 103 is disposed on the inner wall of the second main body section 12.

[0068] After the fuel nozzle is inserted into the flow guide body 1 through the insertion port 101, the outlet of the fuel nozzle is positioned beyond the air outlet 103.

[0069] For example, the air outlet 103 is disposed on the inner wall of the flow guide body 1 where the support block 13 is located.

[0070] For example, when the support blocks 13 within the first main body segment 11 and the second main body segment 12 are arranged in a continuous manner, the air vent 103 disposed within the second main body segment 12 structurally transversely cuts off the support block 13, such as... Figure 5 As shown.

[0071] In some embodiments, the aerator body is made of plastic. Plastic has a much lower density than metal, and using plastic aerator components can significantly reduce the overall weight of the vehicle. Furthermore, plastic is an insulator compared to metal. In fuel systems, plastic materials can reduce the risk of static electricity.

[0072] In some embodiments, a plurality of first positioning blocks 14 are provided on the outer wall of the flow guiding body 1 near the insertion interface 101. The extension direction of the first positioning blocks 14 is the same as the extension direction of the flow guiding body 1, and the first positioning blocks 14 protrude radially from the outer wall of the flow guiding body 1.

[0073] The inner wall of the refueling pipe is pre-set with a first positioning groove that cooperates with the first positioning block 14. When the flow guide body 1 is installed in the refueling pipe, the first positioning block 14 is engaged in the first positioning groove, thereby fixing the flow guide body 1 in the refueling pipe and preventing the flow guide body 1 from rotating.

[0074] For example, since the first positioning block 14 protrudes from the outer wall of the flow guide body 1, the overall diameter of the end where the insertion interface 101 is located (i.e. the end where the flow guide body 1 has a larger diameter) is greater than the overall diameter of the other end where the flow guide port 102 is located (i.e. the end where the flow guide body 1 has a smaller diameter). Thus, during installation, the operator can only insert the smaller diameter flow guide port 102 into the refueling pipe first, avoiding the problem of reverse installation.

[0075] For example, a plurality of the first positioning blocks 14 are arranged radially spaced around the flow guide body 1.

[0076] In some embodiments, a plurality of second positioning blocks 15 are provided on the outer wall of the flow guiding body 1 near the flow guiding port 102. The extension direction of the second positioning blocks 15 is the same as the extension direction of the flow guiding body 1, and the second positioning blocks 15 protrude radially from the outer wall of the flow guiding body 1.

[0077] Meanwhile, the height of the second positioning block 15 is less than the height of the first positioning block 14. That is, the vertical distance between the top of the second positioning block 15 and the outer wall of the flow guiding body 1 is less than the vertical distance between the top of the first positioning block 14 and the outer wall of the flow guiding body 1.

[0078] The vertical distance between the top of the second positioning block 15 and the outer wall of the flow guide body 1 is set to be smaller than the vertical distance between the top of the first positioning block 14 and the outer wall of the flow guide body 1.

[0079] The inner wall of the refueling pipeline is also provided with a second positioning groove that matches the second positioning block 15.

[0080] Because the diameter of the flow guide body 1 in the area where the second positioning block 15 is located (increased due to the protrusion of the second positioning block 15) is smaller than the diameter of the flow guide body 1 in the area where the first positioning block 14 is located, this provides a physical restriction on the installation sequence of the insertion interface 101 and the flow guide port 102. That is, before inserting the flow guide body 1 into the refueling pipe, only the end of the smaller-diameter flow guide port 102 can be inserted into the opening of the refueling pipe first. At this time, the second positioning block 15 near the end of the flow guide port 102 will first meet and engage with the second positioning groove on the inner wall of the refueling pipe. As the flow guide body 1 continues to advance inward, the first positioning block 14 on the flow guide body 1 will subsequently meet and engage with the corresponding first positioning groove, ultimately completing the overall positioning and fixing of the flow guide body 1. This design of varying positioning block heights on the flow guide body 1 effectively prevents the flow guide port 102 and the insertion interface 101 from being reversed during installation, ensuring correct installation.

[0081] For example, a plurality of the second positioning blocks 15 are arranged radially spaced around the flow guide body 1.

[0082] In some embodiments, the flow guiding body 1 and the support block 13, the first positioning block 14, the second positioning block 15 and the air outlet 103 provided on the flow guiding body 1 are manufactured by an integral molding process.

[0083] In some embodiments, the present invention also provides a vehicle that uses the aforementioned flow guiding component or the aforementioned refueling hose assembly. Exemplarily, the vehicle has a refueling port and a refueling hose connected to the refueling port, and the flow guiding component is installed within the refueling hose. Preferably, the insertion port 101 is flush with the opening of the refueling hose connected to the refueling port. An external refueling device, such as a refueling nozzle, is inserted into the flow guiding component through the refueling port on the vehicle to refuel.

[0084] As mentioned above, the structure of the flow guiding component and the refueling pipe assembly has been described in detail in the foregoing, so it will not be repeated here.

[0085] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A flow guiding component, characterized in that, include: The flow guide body has a plug interface and a flow guide port. The plug interface is located at one end of the flow guide body and is used for detachably connecting to an external refueling device. The flow guide is located at the other end of the flow guide body and is connected to the vehicle's fuel tank; The interior of the flow guiding body forms a flow guiding channel between the insertion interface and the flow guiding port. The flow area of ​​the insertion interface is larger than the flow area of ​​the flow guiding port, and the flow guiding channel near the flow guiding port has a tapered structure. At least one support block is disposed on the inner wall of the flow guide body. The extension direction of the support block is the same as the extension direction of the flow guide channel. The support block protrudes toward the central axis of the flow guide channel to provide radial support for the external refueling device and to space the external refueling device from the inner wall of the flow guide body.

2. The flow guiding component according to claim 1, characterized in that, The two ends of the support block are respectively separated from the insertion interface and the flow guide.

3. The flow guiding component according to claim 1, characterized in that, The air guide body is also provided with an air outlet.

4. The flow guiding component according to claim 3, characterized in that, The distance between the vent and the guide port is less than the distance between the vent and the connector.

5. A flow guiding component according to claim 1, characterized in that, The flow guide body is made of plastic material.

6. The flow guiding component according to claim 1, characterized in that, The flow guiding body includes a first main body section and a second main body section that are interconnected. The opening of the first main body section is the insertion interface, and the opening of the second main body section is the flow guiding port. The inner diameter of the first main body segment gradually decreases from the insertion interface toward the second main body segment, and the inner diameter of the second main body segment gradually decreases from the connection between the second main body segment and the first main body segment toward the flow guide. The inner wall of the first main body is inclined, and the inclination angle of the inner wall of the first main body is set such that when the external refueling device is inserted into the insertion interface, the angle between the axis of the external refueling device and the axis of the guide channel is less than 10°.

7. A refueling pipe assembly, characterized in that, It includes the flow guiding component and refueling pipeline as described in any one of claims 1-6; the flow guiding component is installed inside the refueling pipeline.

8. The refueling pipe assembly according to claim 7, characterized in that, A plurality of first positioning blocks are also provided on the outer wall of the flow guide body near the insertion interface, and the first positioning blocks protrude radially from the outer wall of the flow guide body; The inner wall of the refueling pipeline is provided with a first positioning groove that mates with the first positioning block.

9. The refueling pipe assembly according to claim 8, characterized in that, A plurality of second positioning blocks are also provided on the outer wall of the flow guide body near the flow guide port. The second positioning blocks protrude radially from the outer wall of the flow guide body. The inner wall of the refueling pipeline is provided with a second positioning groove that mates with the second positioning block; The height of the second positioning block is less than the height of the first positioning block.

10. A vehicle, characterized in that, It includes the flow guiding component as described in any one of claims 1-6, or the refueling pipe assembly as described in any one of claims 7-9.

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