End plug sealing structure for hydrogen storage container

Abstract

The utility model relates to the technical field of sealing structures, in particular to an end plug sealing structure for a hydrogen storage container, which comprises a bottle body and a bottle neck, and a sealing mechanism is arranged in the bottle neck. The sealing mechanism comprises a plug column arranged in the bottle neck and an end block fixedly arranged at the end of the plug column and used for rotating the plug column, and a cylindrical groove matched with the plug column is formed in the inner ring face of the bottle neck. A first sealing assembly used for sealing the cylindrical groove is arranged at the end of the plug column. According to the hydrogen storage container, by arranging the first sealing assembly, when the bottle body of the hydrogen storage container is sealed, the first sealing ring at the end of the plunger can abut against the interior of the cylindrical groove, so that effective sealing of the interior of the sealing thread can be achieved, hydrogen in the bottle body is prevented from making contact with the sealing thread, effective protection of the sealing thread is achieved, and the service life of the hydrogen storage container is prolonged. And therefore, the service life of the sealing structure is effectively prolonged, and the situation that the sealing threads are in contact with hydrogen for a long time to cause structural fatigue and failure is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing structures, in particular to an end plug sealing structure for a hydrogen storage container. Background Art

[0002] The use of hydrogen storage containers for high-pressure hydrogen storage and transportation has low operating costs, relatively low energy consumption, and a fast response speed for hydrogen charging and discharging. It is suitable for short distances and situations with dispersed users. It is currently the most commonly used storage and transportation method. When storing hydrogen, hydrogen storage containers need to be sealed using a sealing structure.

[0003] In the prior art, there is a large-volume steel seamless gas cylinder end plug sealing structure with publication number CN204328475U, and a new type of steel seamless gas cylinder end plug sealing structure with publication number CN207702127U. Hydrogen is stored in the container, and the hydrogen can reach the seal only after passing through the gap between the inner thread of the container and the outer thread of the end plug. Therefore, during daily use, the threads of the end plug and the container will be in contact with the hydrogen medium for a long time. The filling process of the hydrogen storage container is a fatigue condition, and the threads are in direct contact with hydrogen, which is more likely to cause fatigue failure under the coupling effect of the hydrogen environment and fatigue load. For example, the gas cylinder end plug structure with publication number CN215812655U adopts multi-pass sealing, has a complex structure, and is in the form of radial sealing. The radial sealing O-ring may be twisted during installation, resulting in sealing failure.

[0004] In view of this, the utility model proposes an end plug sealing structure for a hydrogen storage container. Summary of the invention

[0005] The utility model aims to provide an end plug sealing structure for a hydrogen storage container, which has the advantage of being able to achieve double sealing, so as to solve the problem of sealing failure caused by easy failure of the sealing thread proposed in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an end plug sealing structure for a hydrogen storage container, comprising a bottle body and a bottle mouth, wherein a sealing mechanism is arranged inside the bottle mouth; the sealing mechanism comprises a plug column arranged inside the bottle mouth and an end block fixed at the end of the plug column for rotating the plug column, and the inner annular surface of the bottle mouth is provided with a cylindrical groove adapted to the plug column; a first sealing component for sealing the cylindrical groove is arranged at the end of the plug column, and the first sealing component comprises a first sealing ring arranged at the end of the plug column; a second sealing component for waterproofing the outside is arranged on a side surface of the end block close to the plug column, and the second sealing component comprises a second sealing ring arranged at the end of the end block.

[0007] As a preferred technical solution, a first annular sealing groove corresponding to the first sealing ring is formed at the end of the plug, and the first sealing ring is fixed to the inner wall of the first annular sealing groove.

[0008] As a preferred technical solution, the wire diameter of the first sealing ring is two-thirds of the depth of the first annular sealing groove.

[0009] As a preferred technical solution, the outer surface of the plug is provided with a sealing thread, and the inner wall of the cylindrical groove is provided with an internal thread groove threadably connected to the sealing thread.

[0010] As a preferred technical solution, a second annular sealing groove corresponding to the second sealing ring is formed on the end surface of the end block, and the second sealing ring is fixed on the inner wall of the second annular sealing groove.

[0011] As a preferred technical solution, the wire diameter of the second sealing ring is two-thirds of the depth of the second annular sealing groove.

[0012] As a preferred technical solution, the end block is in the shape of a disk, and the outer annular surface of the end block is provided with a plurality of angular notches in a circular array for facilitating the rotation of the end block.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model provides a first sealing component, and when the bottle body of the hydrogen storage container is sealed, the first sealing ring at the end of the plug column can be pressed against the inside of the cylindrical groove, thereby achieving effective sealing of the inside of the sealing thread, avoiding contact between the hydrogen in the bottle body and the sealing thread, achieving effective protection of the sealing thread, and effectively improving the service life of the sealing structure, avoiding the sealing thread from failing due to structural fatigue caused by long-term contact with hydrogen.

[0014] The utility model provides a second sealing component, and after the plug is installed, the second sealing ring on the end face of the end block can be in tight contact with the end of the bottle mouth to achieve external sealing of the sealing thread, effectively avoiding rust caused by contact between the external air and the sealing thread, and further ensuring the service life of the sealing thread. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of the bottle body and bottle mouth of the utility model.

[0018] Figure 3 It is a schematic diagram of the cross-sectional structure of the bottle mouth and the plug of the utility model.

[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of the plug column and the end block after the first sealing ring and the second sealing ring are removed from the utility model.

[0020] Figure 5 It is a schematic diagram of the cross-sectional structure of the plug and the end block of the utility model.

[0021] In the figure: 1, bottle body; 2, bottle mouth; 3, sealing mechanism; 301, plug; 302, end block; 303, cylindrical groove; 304, first sealing assembly; 3041, first sealing ring; 3042, first annular sealing groove; 305, second sealing assembly; 3051, second sealing ring; 3052, second annular sealing groove; 306, sealing thread. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0024] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] According to the attached Figure 1-5 As shown, an embodiment of the utility model provides an end plug sealing structure for a hydrogen storage container, comprising a bottle body 1 and a bottle mouth 2, wherein a sealing mechanism 3 is arranged inside the bottle mouth 2; the sealing mechanism 3 comprises a plug rod 301 arranged inside the bottle mouth 2 and an end block 302 fixedly arranged at the end of the plug rod 301 for rotating the plug rod 301, wherein the end block 302 is in the shape of a disc, and a plurality of angular notches are provided on the outer annular surface of the end block 302 in a circular array for facilitating the rotation of the end block 302, so that the end block 302 becomes a polygonal rotating block.

[0026] The inner ring surface of the bottle mouth 2 is provided with a cylindrical groove 303 adapted to the plug 301, wherein the length of the plug 301 is 0.5mm-1mm longer than the depth of the cylindrical groove 303, that is, after the plug 301 is installed in place, there is a certain gap between the end face of the end block 302 and the end face of the bottle mouth 2.

[0027] The outer surface of the plug 301 is provided with a sealing thread 306 , and the inner wall of the cylindrical groove 303 is provided with an internal thread groove threadably connected to the sealing thread 306 .

[0028] A first sealing assembly 304 for sealing the cylindrical groove 303 is provided at the end of the plug 301, and the first sealing assembly 304 includes a first sealing ring 3041 arranged at the end of the plug 301; a first annular sealing groove 3042 corresponding to the first sealing ring 3041 is opened at the end of the plug 301, and the first sealing ring 3041 is fixed on the inner wall of the first annular sealing groove 3042.

[0029] The diameter of the first sealing ring 3041 is two thirds of the depth of the first annular sealing groove 3042 .

[0030] Among them, the utility model provides a first sealing component 304, when sealing the bottle body 1 of the hydrogen storage container, the plug 301 can be threadedly connected into the cylindrical groove 303 in the bottle mouth 2 through the sealing thread 306, and after tightening, the first sealing ring 3041 at the end of the plug 301 can be pressed against the inside of the cylindrical groove 303, so as to achieve effective sealing of the inside of the sealing thread 306, avoid contact between the hydrogen in the bottle body 1 and the sealing thread 306, achieve effective protection for the sealing thread 306, and then effectively improve the service life of the sealing structure, and avoid the sealing thread 306 from long-term contact with hydrogen and structural fatigue and failure.

[0031] A second sealing component 305 for waterproofing the outside is provided on one side surface of the end block 302 close to the plug 301 . The second sealing component 305 includes a second sealing ring 3051 provided at the end of the end block 302 .

[0032] A second annular sealing groove 3052 corresponding to the second sealing ring 3051 is formed on the end surface of the end block 302 , and the second sealing ring 3051 is fixedly arranged on the inner wall of the second annular sealing groove 3052 .

[0033] The wire diameter of the second sealing ring 3051 is two thirds of the depth of the second annular sealing groove 3052 .

[0034] Among them, the utility model sets a second sealing component 305. After the plug 301 is installed, the second sealing ring 3051 on the end face of the end block 302 can be in tight contact with the end of the bottle mouth 2 to achieve external sealing of the sealing thread 306, effectively avoiding rust caused by contact between external air and the sealing thread 306, and further ensuring the service life of the sealing thread 306.

[0035] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. An end plug sealing structure for a hydrogen storage container, comprising a bottle body (1) and a bottle mouth (2), characterized in that: A sealing mechanism (3) is provided inside the bottle mouth (2); The sealing mechanism (3) comprises a plug (301) arranged inside the bottle mouth (2) and an end block (302) fixed to the end of the plug (301) for rotating the plug (301), and the inner annular surface of the bottle mouth (2) is provided with a cylindrical groove (303) adapted to the plug (301); The end of the plug rod (301) is provided with a first sealing assembly (304) for sealing the cylindrical groove (303), and the first sealing assembly (304) comprises a first sealing ring (3041) provided at the end of the plug rod (301); A second sealing component (305) for waterproofing the outside is provided on a surface of one side of the end block (302) close to the plug (301), and the second sealing component (305) comprises a second sealing ring (3051) provided at the end of the end block (302).

2. The end plug sealing structure for a hydrogen storage container according to claim 1, characterized in that: A first annular sealing groove (3042) corresponding to the first sealing ring (3041) is formed at the end of the plug (301), and the first sealing ring (3041) is fixed to the inner wall of the first annular sealing groove (3042).

3. The end plug sealing structure for a hydrogen storage container according to claim 1, characterized in that: The wire diameter of the first sealing ring (3041) is two thirds of the depth of the first annular sealing groove (3042).

4. The end plug sealing structure for a hydrogen storage container according to claim 1, characterized in that: The outer surface of the plug (301) is provided with a sealing thread (306), and the inner wall of the cylindrical groove (303) is provided with an internal thread groove threadably connected to the sealing thread (306).

5. The end plug sealing structure for a hydrogen storage container according to claim 1, characterized in that: The end surface of the end block (302) is provided with a second annular sealing groove (3052) corresponding to the second sealing ring (3051), and the second sealing ring (3051) is fixedly arranged on the inner wall of the second annular sealing groove (3052).

6. The end plug sealing structure for a hydrogen storage container according to claim 1, characterized in that: The wire diameter of the second sealing ring (3051) is two thirds of the depth of the second annular sealing groove (3052).

7. The end plug sealing structure for a hydrogen storage container according to claim 1, characterized in that: The end block (302) is in the shape of a disk, and the outer ring surface of the end block (302) is provided with a plurality of angular notches in a circular array for facilitating the rotation of the end block (302).

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