Lightweight composite gas cylinder

Abstract

The utility model discloses a kind of lightweight composite material gas cylinders, it is related to automobile parts technical field, including non-metal inner bag, its characterized in that, fiber resin reinforcing layer is wound in the outer portion of inner bag, the both ends of inner bag are equipped with bottle mouth, the inside of bottle mouth is equipped with sealing insert, the outer portion of bottle mouth is connected with end head sheath by screw thread, end head sheath is connected with metal end by screw thread, first sealing ring is equipped between metal end and sealing insert;A kind of lightweight composite material gas cylinder of the utility model, gas cylinder is light in weight, high fatigue strength, end connection is stable, guarantee the overall strength of end position while guaranteeing sealing, there is no air leakage phenomenon, compared with metal inner bag gas cylinder, avoid the problem that slag produced due to metal welding process blocks pipeline, with corrosion resistance, zero weld, sealed reliable and other advantages, reduce automobile complete equipment mass, improve automobile power, reduce fuel consumption.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to a lightweight composite material gas cylinder. Background Technology

[0002] Gas cylinders are gas storage devices in automotive braking systems. They store gas compressed by an air compressor and are used in automotive braking, horn, and other systems. Trucks use gas in many places, from small things like horns to large things like brakes. Traditional metal gas cylinders are made of aluminum or steel. Steel cylinders are heavier and require an anti-corrosion coating, while aluminum cylinders are lighter. However, both types of cylinders require welding. The existing Type III wound gas cylinder has a metal inner liner, with inlet / outlet ports and sensor interfaces at both ends. The ends are connected to the metal inner liner by welding, and the outer layer is wound with a fiber resin composite material.

[0003] Traditional metal gas cylinders have several drawbacks: they are heavy, require welding at multiple points on the ends and body, and are prone to porosity at the weld seams, leading to leakage risks. Existing Type III wound gas cylinders also have drawbacks: compared to Type IV cylinders, Type III cylinders use a metal liner, making them heavier. Furthermore, the metal ends are welded to the liner, which is prone to porosity at the weld seams, causing leakage. In addition, welding slag is generated at the ends, which cannot be cleaned from inside the liner, resulting in slag residue that can ultimately block the gas passages, leading to a series of problems such as increased fuel consumption and reduced vehicle power.

[0004] Therefore, it is necessary to design a lightweight composite material gas cylinder to improve the above problems. Utility Model Content

[0005] To address the aforementioned problems in the prior art, this utility model provides a lightweight composite material gas cylinder with advantages such as corrosion resistance, zero weld seams, and reliable sealing.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A lightweight composite gas cylinder includes a non-metallic inner liner, an outer layer of fiber resin reinforcement wrapped around the inner liner, nozzles at both ends of the inner liner, a sealing insert inside the nozzle, an end sleeve threaded to the outer side of the nozzle, a metal end threaded to the end sleeve, and a first sealing ring between the metal end and the sealing insert.

[0008] As a preferred embodiment of this invention, the sealing insert is embedded in the bottle mouth position during the inner liner processing.

[0009] As a preferred embodiment of this invention, the inner liner is integrally molded from polyethylene material.

[0010] As a preferred embodiment of this invention, the material of the sealing insert is the same as that of the inner liner.

[0011] As a preferred embodiment of this utility model, the end sheath is provided with unequal-pitch threads.

[0012] As a preferred embodiment of this utility model, a brim extends from the end cover, and the brim has multiple notches.

[0013] As a preferred embodiment of this invention, a second sealing ring is provided on the metal end.

[0014] As a preferred embodiment of this invention, a drain pipe is connected to the metal end, and the drain pipe is built into the inner liner.

[0015] By adopting the above technical solution, the beneficial effects of this utility model compared with the prior art are:

[0016] 1. This utility model discloses a lightweight composite material gas cylinder. The gas cylinder is lightweight, has high fatigue strength, stable end connection, and ensures both sealing performance and overall strength of the end position. There is no gas leakage. Compared with metal-lined gas cylinders, it avoids the problem of weld slag clogging the pipeline due to metal welding process. It has advantages such as corrosion resistance, zero weld seams, and reliable sealing.

[0017] 2. The lightweight composite material gas cylinder of this utility model reduces the curb weight of a vehicle, improves vehicle power, and reduces fuel consumption. Attached Figure Description

[0018] Other objects and results of this invention will become more apparent and readily understood with reference to the following description taken in conjunction with the accompanying drawings, and with a more complete understanding of the invention. In the drawings:

[0019] Figure 1 This is a perspective view of an example of this utility model;

[0020] Figure 2 This is a schematic diagram of the structural relationship of an example of this utility model;

[0021] Figure 3 This is an exploded view of an example of this utility model;

[0022] The reference numerals in the attached drawings include: inner liner 1, bottle mouth 11, fiber resin reinforcement layer 2, sealing insert 3, end sleeve 4, cap 41, notch 42, metal end 5, first sealing ring 6, drain pipe 7. Detailed Implementation

[0023] The technical solutions of various embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. It should be pointed out that all accompanying drawings are exemplary representations. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] The present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0027] Reference Figures 1 to 3 , Figure 1 This is a perspective view of an example of this utility model. Figure 2 This is a schematic diagram of the structural relationship of an example of this utility model. Figure 3This is an exploded view of an embodiment of the present invention. The present invention provides a lightweight composite material gas cylinder, comprising an inner liner 1, a fiber resin reinforcing layer 2, a sealing insert 3, an end sleeve 4, a metal end 5, a first sealing ring 6, and a drain pipe 7. The inner liner 1 is a non-metallic inner liner. In one embodiment, the inner liner 1 is integrally molded from polyethylene material. The outer surface of the inner liner 1 is wrapped with a fiber resin reinforcing layer 2, the thickness of which is preferably set to 1.5mm to 3mm. During the winding process, the reinforcing layer 2 encloses the end sleeve 4, providing protection for the inner liner 1 and simultaneously improving the positional strength of the end sleeve 4. Bottle nozzles 11 are provided at both ends of the inner liner 1. An internal sealing insert 3 is provided, which is embedded at the nozzle 11 during the processing of the inner liner 1. Its main function is to enhance the seal. The material of the sealing insert 3 is the same as that of the inner liner 1. An end sleeve 4 is threadedly connected to the nozzle 11, and a metal end 5 is threadedly connected to the end sleeve 4. A first sealing ring 6 is provided between the metal end 5 and the sealing insert 3. The metal end 5 is pressed tightly against the nozzle 11 of the inner liner 1, and the first sealing ring 6 presses against the sealing insert 3, achieving a sealing effect between the metal end 5 and the inner liner 1. A drain pipe 7 is connected to the metal end 5 and is built into the inner liner 1 to facilitate the drainage of liquid from the inner liner 1. The end sleeve 4 is cap-shaped, with a brim 41 extending from the end sleeve 4. The brim 41 is positioned between the inner liner 1 and the reinforcing layer 2, and has multiple notches 42. The notches 42 serve to prevent slippage and increase friction to avoid rotating the reinforcing layer 2, thereby ensuring the sealing effect.

[0028] In one embodiment, the end sleeve 4 is provided with unequal-pitch threads, which are used to connect the bottle mouth 11 of the inner liner 1 and the metal end 5, respectively. In one embodiment, the metal end 5 is provided with a second sealing ring (not shown), which is used to strengthen the seal. The metal end 5 itself can also be provided with a structure to strengthen the seal.

[0029] This invention relates to a lightweight composite gas cylinder. The cylinder is lightweight, and the non-metallic inner liner requires no special anti-corrosion treatment, exhibiting aging and corrosion resistance. It significantly reduces the overall weight of the cylinder and boasts high fatigue strength. Through an innovative connection structure between the non-metallic inner liner and the metal end, it solves the welding defects and weight problems of traditional gas cylinders. Furthermore, the end connection is stable and leak-free. Compared to metal-liner cylinders, the one-piece molding process eliminates the need for welding, avoiding the problem of weld slag clogging the pipeline. It offers advantages such as corrosion resistance, zero weld seams, and reliable sealing. The cylinder is cured through high-temperature heating to ensure strength. Various verification tests show that it has a higher hardness than metal materials, 3-5 times that of steel or aluminum, while weighing only one-fifth. It also exhibits high fatigue strength, with static fatigue strength exceeding that of metal materials by 40%, and high corrosion resistance and chemical stability. This invention reduces the vehicle's curb weight, improves vehicle power, reduces fuel consumption, and lowers exhaust pollution while ensuring strength and safety performance.

[0030] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A lightweight composite material gas cylinder, comprising a non-metallic inner liner, characterized in that, The inner liner is wrapped with a fiber resin reinforcement layer. The two ends of the inner liner are provided with bottle mouths. The bottle mouths are provided with sealing inserts. The bottle mouths are threadedly connected to end sleeves. The end sleeves are threadedly connected to metal ends. A first sealing ring is provided between the metal ends and the sealing inserts.

2. The lightweight composite material gas cylinder according to claim 1, characterized in that, The sealing insert is embedded in the bottle mouth position during the inner liner manufacturing process.

3. The lightweight composite material gas cylinder according to claim 1, characterized in that, The inner liner is made of polyethylene and molded in one piece.

4. A lightweight composite material gas cylinder according to claim 1, characterized in that, The sealing insert is made of the same material as the inner liner.

5. A lightweight composite material gas cylinder according to claim 1, characterized in that, The end sleeve is provided with unequal-pitch threads.

6. A lightweight composite material gas cylinder according to claim 1, characterized in that, The end cap extends to form a brim, which has multiple notches.

7. A lightweight composite material gas cylinder according to claim 1, characterized in that, A second sealing ring is provided on the metal end.

8. A lightweight composite material gas cylinder according to claim 1, characterized in that, A drain pipe is connected to the metal end, and the drain pipe is built inside the inner liner.

Images