A leak-proof multi-layer composite fuel tank structure

Abstract

The utility model relates to the technical field of multilayer composite oil tank, especially is a kind of anti-leakage multilayer composite oil tank structure, including oil tank main body, the outer surface of oil tank main body is fixedly connected with side plate, bottom shell is installed in the lower of oil tank main body, the side of bottom shell is fixedly connected with flange, the surface of flange is equipped with mounting hole, the inside movable joint of mounting hole is equipped with threaded column, the end of threaded column away from flange extends to the above of side plate by passing through side plate, the outer surface of threaded column is screw thread connection has nut, the nut is located in the above of side plate, the outer surface of threaded column is equipped with spring, and the spring is located between side plate and flange. The utility model provides a kind of multilayer composite oil tank structure, which can effectively prevent leakage, improve the safety and reliability of oil tank.

Description

Technical Field

[0001] This utility model relates to the field of multi-layer composite oil tanks, and in particular to a leak-proof multi-layer composite oil tank structure. Background Technology

[0002] The fuel tank is an important component of a vehicle's fuel system. Its main function is to store and stably supply the fuel required by the engine. The structure of the fuel tank varies from vehicle model to vehicle, but the basic components are roughly the same. The core objectives are to safely store fuel, efficiently supply fuel, and prevent leakage. Leak-proof multi-layer composite fuel tanks have various structures and are commonly found in automotive fuel tanks and large oil storage tanks.

[0003] Fuel tank leaks mainly occur in three scenarios: physical impact, material aging, and seal failure. The leak areas are concentrated at structural connection points and vulnerable parts. When a vehicle passes over potholes, steps, or obstacles while driving, the fuel tank under the chassis is easily hit by stones or metal parts, causing the tank to crack or the interface to deform, which can easily lead to fuel tank leaks. Utility Model Content

[0004] In view of this, the present invention provides a leak-proof multi-layer composite oil tank structure. The main technical problem to be solved is to provide a multi-layer composite oil tank structure that can effectively prevent leakage and improve the safety and reliability of the oil tank.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a leak-proof multi-layer composite oil tank structure, comprising an oil tank body, a side plate fixedly connected to the outer surface of the oil tank body, a bottom shell installed below the oil tank body, a flange fixedly connected to the side of the bottom shell, an installation hole provided on the surface of the flange, a threaded post movably connected inside the installation hole, one end of the threaded post away from the flange extending through the side plate to the top of the side plate, a nut threadedly connected to the outer surface of the threaded post, the nut being located above the side plate, and a spring sleeved on the outer surface of the threaded post, the spring being located between the side plate and the flange.

[0006] By adopting the above technical solution, when the bottom of the fuel tank is directly impacted by stones or metal parts, the stone will first strike the bottom shell. The impact force will cause the bottom shell to move upward, compressing the spring. This converts the impact force directly acting on the bottom of the fuel tank into the elastic potential energy of the spring, which is stored and slowly released. This effectively reduces the direct impact force on the main body of the fuel tank, preventing the main body of the fuel tank from cracking or the interface from deforming due to violent impact, thereby reducing the risk of fuel leakage. At the same time, the spring also helps the bottom shell to quickly return to its initial position after the impact, maintaining the stability of the fuel tank structure.

[0007] As a further description of the above technical solution:

[0008] The number of side plates is two, and the two side plates are respectively installed on the left and right sides of the main body of the oil tank. The number of flanges is two, and the two flanges are respectively installed on the left and right sides of the bottom shell, and the flanges are located below the side plates. The number of threaded posts is multiple, and the multiple threaded posts are respectively installed on the two flanges.

[0009] By adopting the above technical solution, it is easy to install the bottom shell at the bottom of the fuel tank body.

[0010] As a further description of the above technical solution:

[0011] The main body of the fuel tank includes an inner shell, a middle shell, and an outer shell. The middle shell is fixedly installed on the outer surface of the inner shell, and the outer shell is fixedly installed on the outer surface of the middle shell.

[0012] By adopting the above technical solution, the inner shell is made of polyethylene, which has the effect of resisting fuel swelling, and the outer shell is made of steel or other materials with good impact resistance to protect the fuel tank. The middle shell is an adhesive layer that connects the inner shell and the outer shell.

[0013] As a further description of the above technical solution:

[0014] The bottom of the main body of the oil tank is fixedly connected with a protrusion, and there are multiple protrusions. The inner bottom of the bottom shell is fixedly connected with a limiting block. A limiting groove is opened on the top of the limiting block. There are multiple limiting blocks, and the multiple protrusions are respectively installed in the multiple limiting grooves.

[0015] By adopting the above technical solution, the protrusion at the bottom of the fuel tank body cooperates with the limiting block at the bottom of the bottom shell, further enhancing the stability of the fuel tank structure. The protrusion is embedded in the limiting groove of the limiting block, effectively preventing the fuel tank body from shifting within the bottom shell. At the same time, the cooperation between the protrusion and the limiting block can utilize the friction between them to dissipate the energy brought by the impact of the stone.

[0016] As a further description of the above technical solution:

[0017] An inlet pipe is fixedly connected to the top of the main body of the oil tank, and an outlet pipe is fixedly connected to the side wall of the main body of the oil tank.

[0018] By adopting the above technical solution, it is easier for fuel to enter and exit the main body of the fuel tank.

[0019] As a further description of the above technical solution:

[0020] The bottom shell has a groove on its side wall, and the discharge pipe is located inside the groove.

[0021] By adopting the above technical solution, it is easy for the discharge pipe to pass through the bottom shell.

[0022] By employing the above technical solution, the leak-proof multi-layer composite oil tank structure of this utility model has at least the following beneficial effects:

[0023] Compared with existing technologies, this leak-proof multi-layer composite fuel tank structure effectively solves the problem of easy leakage of fuel tanks under scenarios such as physical impact, material aging, and seal failure through a unique structural design, thereby improving the safety and reliability of the fuel tank and providing a strong guarantee for the stable operation of the vehicle's fuel system. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure from a first-view perspective of the present invention.

[0025] Figure 2 This is a schematic diagram of the overall structure from a second perspective proposed in this utility model;

[0026] Figure 3 This is a first-view sectional view of the internal structure proposed in this utility model;

[0027] Figure 4 This is a second-view sectional view of the internal structure proposed in this utility model;

[0028] Figure 5 This is a third-view sectional view of the internal structure proposed in this utility model;

[0029] Figure 6 The present utility model proposes Figure 5 Enlarged view of the structure at point A in the middle.

[0030] Legend:

[0031] 1. Tank body; 2. Side plate; 3. Bottom shell; 4. Flange; 5. Mounting hole; 6. Threaded post; 7. Nut; 8. Spring; 9. Protrusion; 10. Limiting block; 11. Groove; 12. Inlet pipe; 13. Outlet pipe. Detailed Implementation

[0032] Reference Figure 1-6This utility model provides a leak-proof multi-layer composite oil tank structure, comprising an oil tank body 1, with two side plates 2 fixedly connected to the outer surface of the oil tank body 1, the two side plates 2 being respectively installed on the left and right sides of the oil tank body 1, and a bottom shell 3 installed below the oil tank body 1, with two flanges 4 fixedly connected to the sides of the bottom shell 3, the two flanges 4 being respectively installed on the left and right sides of the bottom shell 3, and the flanges 4 being located below the side plates 2, with mounting holes 5 opened on the surface of the flanges 4, and multiple threaded posts 6 being movably connected inside the mounting holes 5, the multiple threaded posts 6 being respectively installed on the two flanges 4, the threaded posts 6 being away from the flanges 4. One end of flange 4 extends through side plate 2 to the top of side plate 2. A nut 7 is threaded onto the outer surface of threaded post 6, located above side plate 2. A spring 8 is fitted onto the outer surface of threaded post 6, positioned between side plate 2 and flange 4. In use, when the bottom of the fuel tank is directly impacted by a stone or metal object, the stone will first strike the bottom shell 3. The bottom shell 3, subjected to the impact force, will move upwards, compressing the spring 8. This converts the impact force directly acting on the bottom of the fuel tank into the elastic potential energy of the spring 8, storing and slowly releasing it. This effectively reduces the direct impact force on the fuel tank body 1, preventing the fuel tank body 1 from cracking or deforming due to severe impact, thereby reducing the risk of fuel leakage. Simultaneously, the spring 8 helps the bottom shell 3 quickly return to its initial position after an impact, maintaining the stability of the fuel tank structure.

[0033] The fuel tank body 1 includes an inner shell, a middle shell, and an outer shell. The middle shell is fixedly installed on the outer surface of the inner shell, and the outer shell is fixedly installed on the outer surface of the middle shell. The inner shell is made of polyethylene, which has the effect of resisting fuel swelling. The outer shell is made of steel or other materials with good impact resistance to protect the fuel tank. The middle shell is an adhesive layer that connects the inner shell and the outer shell.

[0034] The bottom of the fuel tank body 1 is fixedly connected with multiple protrusions 9. A limiting block 10 is fixedly connected to the inner bottom of the bottom shell 3. The top of the limiting block 10 has a limiting groove. Multiple limiting blocks 10 are also present, with the protrusions 9 installed in the limiting grooves. The protrusions 9 at the bottom of the fuel tank body 1 cooperate with the limiting blocks 10 at the inner bottom of the bottom shell 3, further enhancing the stability of the fuel tank structure. The protrusions 9 are embedded in the limiting grooves of the limiting blocks 10, effectively preventing the fuel tank body 1 from shifting within the bottom shell 3. Simultaneously, the cooperation between the protrusions 9 and the limiting blocks 10 utilizes the friction between them to dissipate the energy generated by the impact of the stone.

[0035] An inlet pipe 12 is fixedly connected to the top of the fuel tank body 1, and an outlet pipe 13 is fixedly connected to the side wall of the fuel tank body 1. A groove 11 is provided on the side wall of the bottom shell 3, and the outlet pipe 13 is located inside the groove 11 to facilitate the entry and exit of fuel in the fuel tank body 1.

[0036] Working Principle: During use, the bottom of the fuel tank may be directly impacted by objects such as stones. The impact force first acts on the bottom shell 3, causing it to move upwards and compress the spring 8. During compression, the spring 8 converts the impact force directly acting on the bottom of the fuel tank into its own elastic potential energy for storage. As the spring 8 slowly releases, this elastic potential energy is gradually converted, effectively reducing the direct impact force on the fuel tank body 1. Simultaneously, after the impact, the elastic restoring force of the spring 8 helps the bottom shell 3 quickly return to its initial position, ensuring the overall stability of the fuel tank structure. Furthermore, the cooperation between the protrusion 9 at the bottom of the fuel tank body 1 and the limiting block 10 at the bottom of the bottom shell 3 further enhances this stability. The protrusion 9, embedded in the limiting groove of the limiting block 10, not only effectively prevents the fuel tank body 1 from shifting within the bottom shell 3 but also dissipates some of the energy from the stone impact through friction between the two, providing additional protection for the fuel tank.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A leak-proof multi-layer composite oil tank structure, comprising an oil tank body (1), characterized in that: A side plate (2) is fixedly connected to the outer surface of the main body (1) of the oil tank. A bottom shell (3) is installed below the main body (1). A flange (4) is fixedly connected to the side of the bottom shell (3). An installation hole (5) is opened on the surface of the flange (4). A threaded column (6) is movably connected inside the installation hole (5). The end of the threaded column (6) away from the flange (4) extends through the side plate (2) to the top of the side plate (2). A nut (7) is threadedly connected to the outer surface of the threaded column (6). The nut (7) is located above the side plate (2). A spring (8) is sleeved on the outer surface of the threaded column (6). The spring (8) is located between the side plate (2) and the flange (4).

2. The leak-proof multi-layer composite oil tank structure according to claim 1, characterized in that: There are two side plates (2), which are respectively installed on the left and right sides of the tank body (1). There are two flanges (4), which are respectively installed on the left and right sides of the bottom shell (3) and the flanges (4) are located below the side plates (2). There are multiple threaded posts (6), which are respectively installed on the two flanges (4).

3. The leak-proof multi-layer composite oil tank structure according to claim 1, characterized in that: The main body of the fuel tank (1) includes an inner shell, a middle shell, and an outer shell. The middle shell is fixedly installed on the outer surface of the inner shell, and the outer shell is fixedly installed on the outer surface of the middle shell.

4. The leak-proof multi-layer composite oil tank structure according to claim 1, characterized in that: The bottom of the tank body (1) is fixedly connected with a protrusion (9), and there are multiple protrusions (9). The bottom of the bottom shell (3) is fixedly connected with a limiting block (10). The top of the limiting block (10) is provided with a limiting groove. There are multiple limiting blocks (10), and multiple protrusions (9) are respectively installed in multiple limiting grooves.

5. The leak-proof multi-layer composite oil tank structure according to claim 1, characterized in that: An inlet pipe (12) is fixedly connected to the top of the oil tank body (1), and an outlet pipe (13) is fixedly connected to the side wall of the oil tank body (1).

6. The leak-proof multi-layer composite oil tank structure according to claim 5, characterized in that: The bottom shell (3) has a groove (11) on its side wall, and the discharge pipe (13) is located inside the groove (11).

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