Dustproof cap for inner container of three-type hydrogen storage cylinder

Abstract

The utility model discloses a dustproof cap for an inner container of a three-type hydrogen storage cylinder, relates to the technical field of hydrogen storage cylinders, and is mainly used for solving the problem that a bottle opening of the inner container of the existing gas cylinder is not protected after the inner container is processed. The main structure is as follows: the cover comprises a barrel-shaped outer cover, and the axis of the bottom surface of the inner cavity of the barrel-shaped outer cover is vertically connected with a stud plug extending towards the opening of the barrel-shaped outer cover. The utility model provides the dustproof cap for the inner container of the three-type hydrogen storage cylinder, and the dustproof cap is arranged on the bottle opening of the inner container of the gas cylinder, so that dust and impurities can be prevented from entering threads of the bottle opening and the inner part of the inner container, and meanwhile, the end surface of the bottle opening of the inner container of the gas cylinder and a sealing surface can be prevented from being scratched.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen storage cylinder technology, and in particular to a dust cap for the inner liner of a type III hydrogen storage cylinder. Background Technology

[0002] Type III hydrogen storage cylinders, also known as aluminum-lined fiber-wound cylinders, are a common type of high-pressure gaseous hydrogen storage cylinder. Their inner liner is typically made of aluminum alloy, while the outer layer is made of fiber-reinforced composite material. In manufacturing Type III hydrogen storage cylinders, the aluminum alloy inner liner is usually formed first, and then the carbon fiber composite material is wound around its surface. This design allows Type III cylinders to maintain good pressure resistance while being relatively lightweight, making them particularly suitable for mobile devices such as hydrogen fuel cell vehicles.

[0003] However, because current aluminum alloy gas cylinder liners are not protected at the cylinder opening after processing, dust and impurities in the air can easily enter the cylinder opening threads and the interior of the liner during the subsequent winding of carbon fiber composite materials. If these dust and impurities are not cleaned in subsequent production processes, they may react with hydrogen, a highly reactive gas, during storage. This can not only affect the purity of the hydrogen but also damage the liner material. Furthermore, these dust and impurities may enter the internal structure of the cylinder valve and pipelines during operation, significantly impacting the safety performance of the gas cylinder.

[0004] In addition, since the current aluminum alloy gas cylinder liner does not take any protective measures for the cylinder opening after processing, the cylinder opening end face and sealing surface may be scratched during the subsequent winding of carbon fiber composite material. Utility Model Content

[0005] The purpose of this utility model is to provide a dust cap for the inner liner of a type III hydrogen storage cylinder. The dust cap is installed on the cylinder mouth and can prevent dust and impurities from entering the cylinder mouth threads and the inside of the inner liner. It can also prevent the cylinder mouth end face and sealing surface of the inner liner from being scratched.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is: a dust cap for the inner liner of a type 3 hydrogen storage cylinder, including a barrel-shaped outer cover, wherein a stud plug extending toward the opening of the barrel-shaped outer cover is vertically connected at the axis of the bottom surface of the inner cavity of the barrel-shaped outer cover.

[0007] As a further improvement of this utility model, the stud plug is provided with a pressure balance hole extending along its axial direction. One end of the pressure balance hole penetrates the bottom outer wall of the barrel-shaped outer cover, and the other end penetrates the free end face of the stud plug.

[0008] As a further improvement of this utility model, the free end face of the stud plug is provided with a filter that can block the air pressure balance hole.

[0009] As a further improvement of this utility model, the free end face of the stud plug is provided with a mounting groove, and the filter is embedded in the mounting groove.

[0010] As a further improvement of this utility model, the inner cavity of the barrel-shaped outer cover is truncated cone-shaped, and the cross-sectional area of ​​the bottom surface of the inner cavity of the barrel-shaped outer cover is smaller than the cross-sectional area of ​​the opening of the barrel-shaped outer cover.

[0011] As a further improvement of this utility model, a handle is also provided on the bottom outer wall of the barrel-shaped outer cover.

[0012] As a further improvement of this utility model, the handle, the barrel-shaped outer cover, and the stud plug are integrated into one piece.

[0013] As a further improvement of this utility model, the handle, the barrel-shaped outer cover, and the stud plug are all made of soft silicone.

[0014] Beneficial effects

[0015] Compared with the prior art, the advantages of the dust cap for the inner liner of a type III hydrogen storage cylinder of this utility model are as follows:

[0016] 1. After the aluminum alloy gas cylinder liner is processed, this dust cap is installed at its mouth. This effectively prevents dust and impurities from entering the cylinder mouth threads and the inside of the liner during the subsequent winding of carbon fiber composite material, thus ensuring the cleanliness of the gas cylinder and providing protection for subsequent hydrogen storage and cylinder use, greatly promoting the safety of gas cylinder use. At the same time, the dust cap also protects the cylinder mouth during the winding of carbon fiber composite material, preventing scratches on the cylinder mouth end face and sealing surface of the gas cylinder liner, thus ensuring product quality.

[0017] The present invention will become clearer from the following description and in conjunction with the accompanying drawings, which are used to explain the embodiments of the present invention. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a cross-sectional view of the present invention;

[0020] Figure 2 This is one of the perspective views of this utility model;

[0021] Figure 3 This is the second perspective view of the present invention.

[0022] Wherein: 1-Barrel-shaped outer cover; 11-Handle; 2-Screw plug; 21-Mounting groove; 22-Filter plate; 3-Pressure balance hole. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. 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, 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; of course, they can also refer to a mechanical connection or an electrical connection; furthermore, they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] Embodiments of the present invention will now be described with reference to the accompanying drawings.

[0026] Example:

[0027] The specific embodiments of this utility model are as follows: Figure 1-3 As shown, a dust cap for the inner liner of a type III hydrogen storage cylinder includes a barrel-shaped outer cover 1. A stud plug 2 extending towards the opening of the barrel-shaped outer cover 1 is vertically connected to the axis of the bottom surface of the inner cavity of the barrel-shaped outer cover 1. In this embodiment, the stud plug 2 has external threads on its outer wall, and correspondingly, the inner wall of the cylinder liner's opening has internal threads. In use, the dust cap can be installed on the cylinder liner's opening through the threaded engagement between the stud plug 2 and the cylinder liner's opening.

[0028] The design of installing a dust cap at the cylinder opening prevents dust and impurities from entering the cylinder opening threads and interior of the fully wound hydrogen storage cylinder during the winding of carbon fiber composite material, thus ensuring the cleanliness of the cylinder opening. Maintaining cleanliness is crucial for subsequent cleaning, drying, and valve installation processes, preventing dust and impurities from adversely affecting these processes and ensuring the production quality and safety of the cylinder. Simultaneously, maintaining cleanliness also provides protection during subsequent hydrogen storage and cylinder use, greatly promoting safe cylinder operation. Furthermore, the dust cap, while blocking the cylinder opening, uses a barrel-shaped outer cap 1 to shield the end face, sealing surface, and outer wall of the cylinder opening, thus protecting the cylinder opening during the winding of carbon fiber composite material and preventing scratches on the cylinder opening end face and sealing surface, ensuring product quality.

[0029] In this dust cap, a pressure balancing hole 3 extending axially is provided inside the stud plug 2. One end of the pressure balancing hole 3 penetrates the bottom outer wall of the barrel-shaped outer cap 1, and the other end penetrates the free end face of the stud plug 2. Through this pressure balancing hole 3, the air pressure between the inner liner of the gas cylinder and the outside air can be balanced, thereby preventing the dust cap from falling off due to excessive pressure inside the gas cylinder.

[0030] To prevent minute dust and impurities from entering the gas cylinder liner through the pressure balance hole 3, the dust cap also features a filter 22 on the free end face of the stud plug 2, which blocks the pressure balance hole 3. The filter 22 is coaxially aligned with the free end face of the stud plug 2, thus precisely covering the pressure balance hole 3 located at the axis of the stud plug 2, thereby achieving a filtering effect. In this embodiment, a mounting groove 21 is provided on the free end face of the stud plug 2 for installing the filter 22, and the filter 22 is embedded in the mounting groove 21. Simultaneously, to prevent the filter 22 from falling out of the mounting groove 21, multiple limiting blocks arranged around its axis are provided on the edge of the mounting groove 21 to abut the filter 22.

[0031] In this dust cap, the inner cavity of the barrel-shaped outer cover 1 is truncated cone-shaped, and the cross-sectional area of ​​the bottom surface of the inner cavity of the barrel-shaped outer cover 1 is smaller than the cross-sectional area of ​​the opening of the barrel-shaped outer cover 1. With this design, as the threaded plug 2 tightens into the inner wall of the gas cylinder liner, the inner wall of the barrel-shaped outer cover 1 will gradually come into close contact with the outer wall of the gas cylinder liner, thereby further improving the sealing performance at the opening of the gas cylinder liner.

[0032] In addition, a handle 11 is provided on the bottom outer wall of the barrel-shaped outer cover 1 for easy access to / from the dust cap. This handle 11 allows workers to easily twist and turn the dust cap, thus facilitating its access.

[0033] In this embodiment, the handle 11, the barrel-shaped outer cover 1, and the stud plug 2 are an integral structure, and all three are made of soft silicone. Soft silicone, as the main material of the dust cover, has significant advantages—it possesses good elasticity and sealing properties, allowing it to tightly fit the inner liner of the bottle and prevent the intrusion of dust and impurities. Simultaneously, soft silicone also has strong corrosion resistance, enabling it to adapt to various complex production environments, thus providing long-term reliable protection for the gas cylinder liner.

[0034] The present invention has been described above in conjunction with the preferred embodiments, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations made in accordance with the essence of the present invention.

Claims

1. A dust cap for the inner liner of a type III hydrogen storage cylinder, characterized in that, Includes a barrel-shaped outer cover (1), and a stud plug (2) extending toward the opening of the barrel-shaped outer cover (1) is vertically connected at the axial center of the bottom surface of the inner cavity of the barrel-shaped outer cover (1).

2. The dust cap for the inner liner of a type III hydrogen storage cylinder according to claim 1, characterized in that, The stud plug (2) is provided with a pressure balance hole (3) extending along its axial direction. One end of the pressure balance hole (3) is provided through the bottom outer wall of the barrel-shaped outer cover (1), and the other end is provided through the free end face of the stud plug (2).

3. The dust cap for the inner liner of a type III hydrogen storage cylinder according to claim 2, characterized in that, The free end face of the stud plug (2) is provided with a filter (22) that can block the air pressure balance hole (3).

4. The dust cap for the inner liner of a type III hydrogen storage cylinder according to claim 3, characterized in that, The stud plug (2) has a mounting groove (21) on its free end face, and the filter (22) is embedded in the mounting groove (21).

5. The dust cap for the inner liner of a type III hydrogen storage cylinder according to claim 1, characterized in that, The inner cavity of the barrel-shaped outer cover (1) is truncated cone-shaped, and the cross-sectional area of ​​the bottom surface of the inner cavity of the barrel-shaped outer cover (1) is smaller than the cross-sectional area of ​​the opening of the barrel-shaped outer cover (1).

6. The dust cap for the inner liner of a type III hydrogen storage cylinder according to any one of claims 1-5, characterized in that, The barrel-shaped outer cover (1) is also provided with a handle (11) on the bottom outer wall.

7. The dust cap for the inner liner of a type III hydrogen storage cylinder according to claim 6, characterized in that, The handle (11), the barrel-shaped outer cover (1), and the stud plug (2) are an integral structure.

8. The dust cap for the inner liner of a type III hydrogen storage cylinder according to claim 6, characterized in that, The handle (11), the barrel-shaped outer cover (1), and the stud plug (2) are all made of soft silicone.

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