A fuel line connection which prevents fuel leakage

Abstract

This utility model discloses a fuel line connector for preventing fuel leakage, belonging to the field of engine technology. It includes a connector body, a valve core, a spring, and a sleeve. The connector body includes a first connecting part and a second connecting part. The second connecting part has a cavity, within which a sleeve is installed. A valve core is installed inside the sleeve. A sealing ring is fitted at one end of the valve core, and a spring is fitted at the other end. The valve core has a perforated structure. Through the cooperation of the connector body, valve core, spring, and sleeve, when the fuel inlet pipe connector is inserted, the spring is compressed, causing the valve core to move within the sleeve. This moves the perforated position of the valve core, allowing diesel fuel to flow normally. When the fuel inlet pipe connector is pulled out, the spring rebounds, pushing the valve core back to its original position. This causes the perforated structure to be blocked by the sleeve, preventing diesel fuel flow. This allows for quick sealing of the pipeline after the fuel inlet pipe connector is pulled out, effectively preventing diesel fuel leakage and promptly sealing the interface, thus avoiding problems related to factory cleanliness and diesel fuel waste.

Description

Technical Field

[0001] This utility model belongs to the field of engine technology, specifically relating to an oil pipe connector that prevents fuel leakage. Background Technology

[0002] The statements in this section are merely background information related to this utility model and do not necessarily constitute prior art.

[0003] Engine bench testing is a testing method that uses a specialized test bench to perform performance tests and evaluations on an engine. To achieve performance testing, precise measurements of engine performance indicators such as power, torque, and fuel consumption rate are taken to assess whether the engine meets design requirements. Reliability verification involves simulating various operating conditions, such as different speeds, loads, and temperatures, to test the engine's durability and reliability, exposing potential design and manufacturing defects. Optimization and tuning are also crucial, providing a basis for engine design improvements and parameter optimization to enhance engine performance and efficiency, and reduce emissions and noise.

[0004] After the engine bench test is completed, the fuel inlet and return lines need to be removed. During this process, diesel fuel leakage is common, which can lead to problems such as factory cleanliness and diesel fuel waste. To prevent diesel fuel leakage, plugs are installed after the fuel inlet and return lines are removed to prevent diesel fuel from flowing back into the engine.

[0005] However, there is a time gap between removing the fuel tank inlet pipe and installing the plug, during which diesel fuel is highly likely to leak back, causing cleanliness issues at the factory. Installing a plug to prevent diesel backflow means that when the engine is transported to the vehicle assembly plant, the plug is removed, resulting in significant diesel leakage that is difficult to clean and wastes diesel fuel. Utility Model Content

[0006] To address the aforementioned problems, this utility model provides a fuel line connector that prevents fuel leakage. Through the cooperation of the connector body, valve core, spring, and sleeve, after the fuel tank inlet pipe connector is inserted, the spring is compressed, causing the valve core to move within the sleeve. This moves the perforated position of the valve core, allowing diesel fuel to flow normally. After the fuel tank inlet pipe connector is pulled out, the spring rebounds, pushing the valve core back to its original position. This causes the perforated structure to be blocked by the sleeve, preventing diesel fuel flow. This allows for rapid sealing of the pipeline after the fuel tank inlet pipe connector is removed, effectively preventing diesel fuel leakage when the fuel inlet and return pipes are disconnected after engine bench testing. It also ensures timely sealing of the interface, thus avoiding issues related to factory cleanliness and diesel fuel waste.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A fuel line connector for preventing fuel leakage includes a connector body, a valve core, a spring, and a sleeve. The connector body includes a first connecting part and a second connecting part. The second connecting part has a cavity. A sleeve is disposed in the cavity. A valve core is disposed in the sleeve. A sealing ring is fitted on one end of the valve core. A spring is fitted on the other end of the valve core. The valve core has a hollow structure.

[0009] As a further technical solution, the first connecting part is a cavity, the cavity of the first connecting part and the cavity of the second connecting part are connected, and the first connecting part is connected to the oil inlet pipe.

[0010] As a further technical solution, the diameter of one end of the second connecting part is larger than the diameter of the other end of the second connecting part.

[0011] As a further technical solution, a slot is provided at the end of the second connecting part with a larger diameter.

[0012] As a further technical solution, the slot and the sleeve on the oil tank inlet pipe joint are used together.

[0013] As a further technical solution, the ferrule is snapped into the slot to connect the connector body and the oil tank inlet pipe connector.

[0014] As a further technical solution, the sleeve and the connector body are interference-fitted.

[0015] As a further technical solution, the sealing ring is an O-ring.

[0016] As a further technical solution, one end of the spring is connected to the valve core.

[0017] As a further technical solution, the other end of the spring is connected to the sleeve.

[0018] Compared with the prior art, the advantages and positive effects of this utility model are:

[0019] This invention utilizes a connector body, valve core, spring, and sleeve in a coordinated manner. After the fuel tank inlet pipe connector is inserted, the spring is compressed, causing the valve core to move within the sleeve. This movement of the valve core's perforated position allows diesel fuel to flow normally. After the fuel tank inlet pipe connector is pulled out, the spring rebounds, pushing the valve core back to its original position. This causes the perforated structure to be blocked by the sleeve, preventing diesel fuel flow. This allows for rapid sealing of the pipeline after the fuel tank inlet pipe connector is removed, effectively preventing diesel fuel leakage when the fuel inlet and return pipes are disconnected after engine bench testing. It also ensures timely sealing of the interface, thus avoiding issues related to factory cleanliness and diesel fuel waste.

[0020] This utility model provides a groove at the second connecting part of the connector body. When the oil tank inlet pipe connector is inserted, the connector body and the oil tank inlet pipe connector are connected by the clamping sleeve of the oil tank inlet pipe connector being engaged in the groove, thereby ensuring the reliability of the connection between the oil pipe connector and the oil tank inlet pipe connector and realizing the rapid connection between the oil pipe connector and the oil tank inlet pipe connector. Attached Figure Description

[0021] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0022] Figure 1 This is a structural diagram of the oil pipe joint for preventing fuel leakage according to this utility model;

[0023] Figure 2 This is a schematic diagram of the fuel line connector for preventing fuel leakage, which is connected to the fuel tank inlet pipe connector of this utility model.

[0024] In the diagram: 1. Connector body; 2. Valve core; 3. Spring; 4. Sleeve; 5. Sealing ring; 6. Compression fitting; 7. Oil tank inlet pipe connector; 8. Slot; 9. Hollowed-out structure. Detailed Implementation

[0025] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0026] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0027] Engine bench testing is a testing method that uses a specialized test bench to perform performance tests and evaluations on an engine. To achieve performance testing, precise measurements are taken of engine performance indicators such as power, torque, and fuel consumption rate to assess whether the engine meets design requirements.

[0028] In addition, reliability verification involves simulating various operating conditions, such as different speeds, loads, and temperatures, to test the engine's durability and reliability, exposing potential design and manufacturing defects. Furthermore, optimization and adjustments provide a basis for engine design improvements and parameter optimization, thereby enhancing engine performance and efficiency, and reducing emissions and noise.

[0029] After the engine bench test is completed, the fuel inlet and return lines need to be removed. During this process, diesel fuel leakage is common, which can lead to problems such as factory cleanliness and diesel fuel waste. To prevent diesel fuel leakage, plugs are installed after the fuel inlet and return lines are removed to prevent diesel fuel from flowing back into the engine.

[0030] However, there is a time gap between removing the fuel tank inlet pipe and installing the plug, during which diesel fuel is highly likely to leak back, causing cleanliness issues at the factory. Installing a plug to prevent diesel backflow means that when the engine is transported to the vehicle assembly plant, the plug is removed, resulting in significant diesel leakage that is difficult to clean and wastes diesel fuel.

[0031] The present invention will now be described in detail with reference to the accompanying drawings. This embodiment discloses a fuel line connector for preventing fuel leakage, such as... Figure 1 As shown, it includes a connector body 1, a valve core 2, a spring 3, and a sleeve 4. The connector body 1 includes a first connecting part and a second connecting part. The second connecting part is a cavity, and the sleeve 4 is installed in the cavity. The valve core 2 is installed in the sleeve 4. A sealing ring 5 is fitted on one end of the valve core 2, and the spring 3 is fitted on the other end of the valve core 2. The valve core 2 is provided with a hollow structure 9.

[0032] Through the cooperation of the connector body 1, valve core 2, spring 3 and sleeve 4, after the oil tank inlet pipe connector 7 is inserted, the spring 3 is compressed, causing the valve core 2 to move inside the sleeve 4, thereby moving the hollow position of the valve core 2 and allowing diesel fuel to flow normally.

[0033] After the fuel tank inlet pipe connector 7 is pulled out, the spring 3 rebounds, pushing the valve core 2 back to its original position. This causes the hollow structure 9 to be blocked by the sleeve 4, preventing diesel flow. This allows the pipeline to be quickly sealed after the fuel tank inlet pipe connector 7 is pulled out. This effectively prevents diesel leakage when the fuel inlet and return pipes are removed after the engine bench test, and promptly seals the interface, thus avoiding problems such as factory cleanliness and diesel waste.

[0034] Specifically, the valve core 2 has a hollow cylindrical structure with openings on its side wall, thus forming a hollow structure 9.

[0035] The first connecting part is a cavity, and the cavities of the first connecting part and the second connecting part are connected. The first connecting part is connected to the oil inlet pipe.

[0036] Specifically, the first connecting part is used to connect with the oil inlet pipe, and the second connecting part is used to connect with the oil tank inlet pipe connector 7. In use, the oil pipe connector of this utility model is installed on the oil inlet pipe, and then the oil tank inlet pipe connector 7 is inserted into the oil pipe connector to perform engine bench testing.

[0037] The fuel line connector prevents diesel fuel from flowing back into the engine after the test run, thus preventing diesel fuel leakage. It features a simple structure, good sealing, and high reliability. The fuel tank inlet pipe connector 7 is connected to the fuel tank inlet pipe connector 7 via a flexible ferrule 6, allowing for quick and easy disassembly and installation, improving production efficiency.

[0038] like Figure 2 As shown, the diameter of one end of the second connecting part is larger than the diameter of the other end of the second connecting part. A slot 8 is provided at the end of the second connecting part with a larger diameter.

[0039] The groove 8 and the sleeve 6 on the fuel tank inlet pipe connector 7 are used together. The sleeve 6 is engaged in the groove 8 to connect the connector body 1 and the fuel tank inlet pipe connector 7.

[0040] Specifically, a groove is provided at the second connecting part of the connector body 1. When the oil tank inlet pipe connector 7 is inserted, the connector body 1 and the oil tank inlet pipe connector 7 are connected by the clamping sleeve 6 of the oil tank inlet pipe connector 7 being engaged in the clamping groove 8. This ensures the reliability of the connection between the oil pipe connector and the oil tank inlet pipe connector 7 and realizes the rapid connection between the oil pipe connector and the oil tank inlet pipe connector 7.

[0041] Sleeve 4 and connector body 1 are interference fit.

[0042] Specifically, an interference fit is a type of fit in mechanical assembly. It refers to a fit where a hole and a shaft of the same basic size are joined together, and the algebraic difference between the hole size and the shaft size is negative. In other words, the actual size of the shaft is larger than the actual size of the hole, and a certain external force or special process is required during assembly to allow the shaft to fit into the hole.

[0043] This utility model adopts an interference fit between the sleeve 4 and the connector body 1, which makes the sleeve 4 and the connector body 1 firmly connected, and can obtain high connection strength and connection stability, withstand large loads, and has a more compact structure.

[0044] The sealing ring 5 is an O-ring. Specifically, the O-ring 5 is a circular ring structure with a circular cross-section, and the material is usually nitrile rubber, fluororubber, silicone rubber, etc.

[0045] The valve core 2 is prevented from coming out by engaging with the sleeve 4 through the O-ring 5. The O-ring 5, relying on its own elastic deformation, will be compressed to a certain extent after being installed in the groove on the valve core 2, thereby generating contact pressure between the contact surfaces.

[0046] When there is medium pressure, the O-ring 5 will deform further, increasing the contact pressure, thereby preventing medium leakage and achieving a sealing effect.

[0047] One end of spring 3 is connected to valve core 2. The other end of spring 3 is connected to sleeve 4.

[0048] Specifically, by utilizing the elastic force of spring 3, when the oil tank inlet pipe connector 7 is inserted, spring 3 is compressed, thereby causing valve core 2 to move along... Figure 2 The movement of the diesel flow direction indicated by the middle arrow opens the valve core 2, allowing diesel to flow.

[0049] After the fuel tank inlet pipe connector 7 is pulled out, the spring 3 rebounds and pushes the valve core 2, thereby closing the valve port of the valve core 2 and sealing the fuel inlet pipe to prevent diesel leakage.

[0050] How does a fuel line fitting that prevents fuel leaks work?

[0051] The fuel line connector is installed at the engine fuel inlet. During the engine factory test run, when it is connected to the fuel tank inlet connector 7, the valve core 2 inside the quick-connect connector opens, allowing diesel fuel from the fuel tank to enter the engine. After the engine test run is completed and the fuel tank inlet is disconnected, the valve core 2 inside the quick-connect connector returns to its closed position, preventing diesel fuel from flowing out of the fuel inlet.

[0052] like Figure 2 As shown, the oil tank inlet pipe connector 7 is fixed to the quick-connect connector by the clamp 6. The valve core 2 is squeezed and moves to the left. The hollow position of the valve core 2 is misaligned with the sleeve 4, thereby opening the valve core 2. The engine oil flows from the hollow position, allowing the oil in the oil tank to enter the engine.

[0053] After the engine test run, remove the sleeve 6 to separate the fuel tank inlet pipe connector 7 from the fuel pipe connector. At this time, the valve core 2 returns to its original position under the force of the spring 3. Figure 1 As shown, valve core 2 is closed, preventing diesel fuel from flowing back to the fuel tank. This effectively prevents diesel fuel leakage when the fuel inlet and outlet pipes are disconnected after engine bench testing, ensuring timely sealing of the interface and avoiding issues related to factory cleanliness and diesel fuel waste.

[0054] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A fuel line fitting for preventing fuel leakage, characterized in that, The device includes a connector body, a valve core, a spring, and a sleeve. The connector body includes a first connecting part and a second connecting part. The second connecting part is a cavity. A sleeve is installed inside the cavity. A valve core is installed inside the sleeve. A sealing ring is fitted on one end of the valve core. A spring is fitted on the other end of the valve core. The valve core has a hollow structure.

2. The fuel line connector for preventing fuel leakage as described in claim 1, characterized in that, The first connecting part is a cavity, and the cavity of the first connecting part and the cavity of the second connecting part are connected. The first connecting part is connected to the oil inlet pipe.

3. A fuel line connector for preventing fuel leakage as described in claim 1, characterized in that, The diameter of one end of the second connecting part is larger than the diameter of the other end of the second connecting part.

4. A fuel line connector for preventing fuel leakage as described in claim 3, characterized in that, The larger diameter end of the second connecting part is provided with a slot.

5. A fuel line connector for preventing fuel leakage as described in claim 4, characterized in that, The slot is used in conjunction with the ferrule on the oil tank inlet pipe connector.

6. A fuel line connector for preventing fuel leakage as described in claim 5, characterized in that, The ferrule engages with the slot to connect the connector body and the oil tank inlet pipe connector.

7. A fuel line connector for preventing fuel leakage as described in claim 1, characterized in that, The sleeve and the connector body are interference-fitted.

8. A fuel line connector for preventing fuel leakage as described in claim 1, characterized in that, The sealing ring is an O-ring.

9. A fuel line connector for preventing fuel leakage as described in claim 1, characterized in that, One end of the spring is connected to the valve core.

10. A fuel line connector for preventing fuel leakage as described in claim 1, characterized in that, The other end of the spring is connected to the sleeve.

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