A throat structure for improving the smoothness of fuel filling of a vehicle

Abstract

The utility model discloses a kind of throat structure of improving the smoothness of automobile fuel filling, which belongs to the technical field of automobile manufacturing. It mainly includes: filling end, filling pipe, connecting pipe, characterized by: one end of the filling pipe is fixedly connected with the filling end, and the other end is fixedly connected with the connecting pipe;The filling pipe is fixed with a turbulence component inside. The utility model adds turbulence component inside filling pipe, forces to form rotational flow when filling fuel, not only can effectively separate gas in fuel, reduce the risk of gun jumping caused by bubble collection when fuel filling, but also can improve the stability of fuel in bending position, reduce the flow rate loss when fuel filling, improve fuel filling efficiency. The utility model is mainly used for the structure optimization of automobile fuel filling system.

Description

Technical Field

[0001] This utility model belongs to the field of automobile manufacturing technology, and more specifically, it relates to a throat structure that improves the smoothness of automobile fuel filling. Background Technology

[0002] In automotive fuel filling systems, the throat structure is a crucial component connecting the filler neck and the fuel tank, and its design directly affects the smoothness, efficiency, and safety of fuel filling. Existing automotive fuel filler throats mostly use a single arc-shaped or straight cylindrical structure, which cannot effectively separate air bubbles in the fuel flowing from the filler nozzle. This causes air bubbles to separate, merge, and rise to the surface at the rear end of the filler tube, resulting in abnormal nozzle shut-off. Furthermore, when fuel flows directly (without rotation) in the filler tube, the flow rate often slows down at inflection points due to impact, causing the nozzle to shut off. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a throat structure that improves the smoothness of fuel filling in automobiles. By adding a turbulence component inside the filling pipe, a swirling flow is forced to form when filling fuel. This not only effectively separates the gas in the fuel and reduces the risk of nozzle tripping due to the accumulation of air bubbles during fuel filling, but also improves the stability of the fuel at the bend, reduces the flow rate loss during fuel filling, and improves fuel filling efficiency.

[0004] The aforementioned throat structure for improving the smoothness of fuel filling in automobiles includes a filling head, a filling pipe, and a connecting pipe. One end of the filling pipe is fixedly connected to the filling head, and the other end is fixedly connected to the connecting pipe. A flow-deflecting component is fixed inside the filling pipe.

[0005] Preferably, a throat structure for improving the smoothness of fuel filling in a vehicle includes a filling head, a filling pipe, and a connecting pipe, characterized in that: one end of the filling pipe is fixedly connected to the filling head, and the other end is fixedly connected to the connecting pipe; a flow-deflecting component is fixed inside the filling pipe.

[0006] Preferably, the spoiler assembly includes a sleeve and spoilers, the sleeve being fitted and fixed to the filling pipe, and having multiple spoilers inside.

[0007] Preferably, the spoiler is fixed to the inner wall of the sleeve in a wound manner.

[0008] Preferably, the twist rate of the spoiler is 1.5D to 1.8D, where "D" is the inner diameter of the filling pipe.

[0009] Preferably, the dispensing end has an embedded throat assembly.

[0010] Preferably, a circulation tube is fixed at the filling end.

[0011] Preferably, it also includes a fixing plate, and the fixing plate is fixedly connected to the filling pipe and the circulation pipe.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. By adding a flow-turbulence component inside the filling pipe, a swirling flow is forced to form during fuel filling, which can effectively separate the gas in the fuel and reduce the risk of nozzle tripping due to the accumulation of air bubbles during fuel filling.

[0013] 2. Improves fuel stability at bends, reduces flow rate loss during fuel filling, and increases fuel filling efficiency. Attached Figure Description

[0014] Figure 1 This is the front view of the present invention; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is a schematic diagram of the turbulence component structure of this utility model.

[0015] In the diagram, 1 is the filling end; 11 is the throat assembly; 2 is the filling pipe; 3 is the connecting pipe; 4 is the turbulence assembly; 41 is the sleeve; 42 is the turbulence plate; 5 is the circulation pipe; and 6 is the fixing plate. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings: The directional terms used in the detailed description paragraphs are only for the convenience of those skilled in the art to understand the technical solutions described in this application based on the visual orientation shown in the accompanying drawings. Unless otherwise expressly specified and limited, the terms "setting," "installation," "connection," etc., should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0017] like Figure 1 and Figure 2 As shown, a throat structure for improving the smoothness of fuel filling in automobiles includes a filling end 1, a filling pipe 2, and a connecting pipe 3. One end of the filling pipe 2 is fixedly connected to the filling end 1, and the other end is fixedly connected to the connecting pipe 3. A flow-deflecting component 4 is fixed inside the filling pipe 2. By adding the flow-deflecting component 4 inside the filling pipe 2, the flow direction of fuel during filling can be forcibly changed to separate gases in the fuel, reducing the risk of nozzle tripping due to air bubble accumulation. It also improves the stability of the fuel at bends, reduces flow rate loss during fuel filling, and increases fuel filling efficiency.

[0018] like Figure 2 and Figure 3As shown, the turbulence-disrupting assembly 4 includes a sleeve 41 and turbulence-disrupting plates 42. The sleeve 41 is fitted and fixed to the filling pipe 2, and multiple turbulence-disrupting plates 42 are provided inside it. In this way, during fuel filling, the turbulence-disrupting plates 42 can cause the fuel to form a swirling flow during the filling process, thereby generating centrifugal force, which causes the air bubbles in the fuel to gather and separate due to changes in density differences and motion patterns.

[0019] Understandably, since the density of the liquid is greater than that of the bubbles, the liquid is thrown towards the pipe wall under centrifugal force, while the bubbles, due to their low inertia and weak force, gather towards the low-pressure area in the center of the pipe. At the same time, the baffle 42 changes the original laminar flow state of the fuel to form a vortex, thereby disrupting the balance of bubble attachment and suspension in the liquid, pushing the bubbles to concentrate towards the center and rise until they detach from the fuel.

[0020] like Figure 2 and Figure 3 As shown, the baffle 42 is fixed to the inner wall of the sleeve 41 in a wound manner. In this way, the wound arrangement can forcibly change the laminar flow state during fuel filling to generate vortices, so as to generate centrifugal force and force the air bubbles in the fuel to converge towards the central low-pressure area.

[0021] like Figure 2 and Figure 3 As shown, the twist pitch of the baffle 42 is 1.5D to 1.8D, where "D" is the inner diameter of the filling pipe 2. Different twist pitches produce different effects; for example, a larger twist pitch reduces flow resistance but weakens the swirling flow, leading to decreased bubble separation efficiency. Conversely, a smaller twist pitch enhances fluid turbulence and centrifugal force but increases flow resistance.

[0022] like Figure 2 As shown, the filling nozzle 1 has a throat assembly 11 embedded inside. Thus, by adding the throat assembly 11 inside the filling nozzle 1, it is easier to distinguish between diesel and gasoline refueling nozzles, preventing damage to the vehicle due to incorrect fuel filling.

[0023] like Figure 1 and 2 As shown, a circulation pipe 5 is fixed at the filling end. In this way, the circulation pipe 5 can not only recover the evaporated fuel vapor, but also prevent fuel overflow, and at the same time ensure the fuel vapor pressure balance in the fuel system.

[0024] Optionally, a fixing plate 6 is also included, and the fixing plate 6 is fixedly connected to the filling pipe 2 and the circulation pipe 5. In this way, the filling pipe 2 and the circulation pipe 5 can be fixed to other structures through the fixing plate 6, ensuring that the filling pipe 2 and the circulation pipe 5 are not prone to shaking or detachment from the structure connected to them under external forces.

[0025] Experimental testing process and results 1. Experimental objective: The optimal winding pitch range was verified by changing the winding pitch of the baffle inside the tube. 2. Experimental conditions: Inner diameter of the circular pipe: D=50mm, height of the spoiler: 5mm (i.e., the height of the spoiler is 10% of the pipe diameter "D"); Fluid: Aqueous solution containing 0.2% surfactant; gas velocity range: 200~1000 ml / min; The twist rates are: 0D (without spoiler), 1.2D (60mm), 1.5D (75mm), and 2D (100mm). 3. Experimental Results (Only the best results are shown): Drainage efficiency: When the twist rate is 1.5D, the foam liquid retention rate decreases from 0.858% at 0D to 0.396%. At this point, the foam layer height decreases by 30%, and the drainage speed increases by 40%. Pressure drop characteristics: When the twist rate is 1.5D, the pressure drop is 25% lower than that at 1.2D, but 15% higher than that at 2D. At a gas velocity of 400 ml / min, the pressure drop is approximately 2100 Pa / m. 4. Foam stability: When the twist rate is 1.2D, its centrifugal force is stronger, which can destroy the highly stable foam liquid film and improve the foam aggregation efficiency by 20%; Experimental conclusion: The twist pitch of the spoiler needs to take into account both foam separation and refueling efficiency. According to experimental verification, the optimal twist pitch range for the spoiler is between 1.5D and 1.8D, which not only takes into account the efficiency of foam separation, but also ensures the efficiency of refueling.

[0026] Finally, although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A throat structure for improving the smoothness of fuel filling in automobiles, comprising a filling end (1), a filling pipe (2), and a connecting pipe (3), characterized in that: One end of the filling tube (2) is fixedly connected to the filling end (1), and the other end is fixedly connected to the connecting tube (3); a turbulence component (4) is fixed inside the filling tube (2).

2. The throat structure for improving the smoothness of fuel filling in automobiles according to claim 1, characterized in that: The turbulence assembly (4) includes a sleeve (41) and a turbulence plate (42). The sleeve (41) is fitted and fixed to the filling pipe (2), and multiple turbulence plates (42) are provided inside it.

3. The throat structure for improving the smoothness of fuel filling in automobiles according to claim 2, characterized in that: The spoiler (42) is fixed to the inner wall of the sleeve (41) in a wound manner.

4. The throat structure for improving the smoothness of fuel filling in automobiles according to claim 3, characterized in that: The twist pitch of the spoiler (42) is 1.5D to 1.8D, where "D" is the inner diameter of the filling pipe (2).

5. The throat structure for improving the smoothness of fuel filling in automobiles according to claim 1, characterized in that: The filling end (1) is embedded with a throat assembly (11).

6. The throat structure for improving the smoothness of fuel filling in automobiles according to claim 5, characterized in that: A circulation pipe (5) is fixed at the filling end.

7. A throat structure for improving the smoothness of fuel filling in automobiles according to any one of claims 1 to 6, characterized in that: It also includes a fixing plate (6), and one end of the fixing plate (6) is fixedly connected to the filling pipe (2) and the circulation pipe (5).

Images