High-pressure gas cylinder sealing joint, sealing structure thereof and high-pressure gas cylinder

Abstract

A high-pressure gas cylinder sealing joint comprises: a disc-shaped bottom having an upper surface and a lower surface and forming a plurality of grooves; the neck part is formed by axially extending the upper surface of the disc-shaped bottom part; and the head part is formed by axially extending the upper end, opposite to the disc-shaped bottom, of the neck part. And the neck part is relatively reduced relative to the head part and the disc-shaped bottom part. In addition, the invention further discloses a high-pressure gas cylinder sealing structure which is provided with the high-pressure gas cylinder sealing connector and a lining body. Furthermore, the invention also discloses a high-pressure gas cylinder which comprises the high-pressure gas cylinder sealing structure and a carbon fiber layer coated outside the lining body.

Description

Technical Field

[0001] The present invention relates to a sealing joint, in particular to a high-pressure gas cylinder sealing joint, its sealing structure and a high-pressure gas cylinder. Background Art

[0002] In response to the severe global environment, reducing carbon emissions and climate warming are the primary goals. Therefore, the green energy industry has gradually received attention. For example, electric vehicles are taking the lead in promotion. The energy of electric vehicles is divided into lithium batteries and fuel cells as driving energy sources.

[0003] Fuel cells are the driving energy sources that have the greatest chance of being connected after lithium batteries at the present stage. The raw material of fuel cells comes from hydrogen energy, so hydrogen storage bottle containers for storing hydrogen are derived.

[0004] However, hydrogen is an unstable gas. Once a leakage event occurs, the safety risk will increase. Therefore, the design of the sealing performance of hydrogen storage bottles is a problem that needs to be overcome urgently. Summary of the Invention

[0005] The purpose of the present invention is to provide a high-pressure gas cylinder sealing joint.

[0006] Therefore, the high-pressure gas cylinder sealing joint of the present invention can be detachably arranged at the ventilation port of the high-pressure gas cylinder. The high-pressure gas cylinder sealing joint includes: a disc-shaped bottom having an upper surface and a lower surface, and forming several grooves; a neck axially extending from the upper surface of the disc-shaped bottom; and a head axially extending from the upper end of the neck opposite to the disc-shaped bottom. The neck has a relatively reduced diameter compared to the head and the disc-shaped bottom.

[0007] In the high-pressure gas cylinder sealing joint of the present invention, the disc-shaped bottom is provided with several through holes penetrating from the upper surface to the lower surface.

[0008] In the high-pressure gas cylinder sealing joint of the present invention, the grooves on the lower surface of the disc-shaped bottom are several grooves arranged in a concentric circle manner, and the lower surface further forms several ribs located between two of the grooves on the lower surface and spaced apart from each other.

[0009] In the high-pressure gas cylinder sealing joint of the present invention, the disc-shaped bottom is provided with several through holes penetrating from the upper surface to the lower surface. The grooves on the lower surface of the disc-shaped bottom are several grooves arranged in a concentric circle manner, and the lower surface further forms several ribs located between two of the grooves on the lower surface and spaced apart from each other.

[0010] In the high-pressure gas cylinder sealing joint of the present invention, the disc-shaped bottom, the neck and the joint are integrally formed of a metal material.

[0011] Another object of the present invention is to provide a high-pressure gas cylinder sealing structure. Thus, the high-pressure gas cylinder sealing structure of the present invention includes the above-mentioned high-pressure gas cylinder sealing structure and a liner body. The liner body is divided into a gas storage section and a joint section. The joint section has a surrounding wall integrally extending from the gas storage section, and the surrounding wall integrally covers the disc-shaped bottom of the joint and the outer ring surface of the neck.

[0012] For the high-pressure gas cylinder sealing structure of the present invention, the material of the liner body is a polymer material, which is injection molded onto the high-pressure gas cylinder sealing joint, so that the liner body can be airtightly fitted to the groove on the disc-shaped bottom of the high-pressure gas cylinder sealing joint.

[0013] For the high-pressure gas cylinder sealing structure of the present invention, the part of the liner body covering the lower surface of the disc-shaped bottom of the high-pressure gas cylinder sealing joint airtightly fills the groove on the lower surface and extends to the inner wall of the vent hole on the disc-shaped bottom.

[0014] For the high-pressure gas cylinder sealing structure of the present invention, the part of the liner body covering the upper surface of the disc-shaped bottom of the high-pressure gas cylinder sealing joint airtightly fills the groove on the upper surface and extends to the junction of the neck and the head of the joint.

[0015] Another object of the present invention is to provide a high-pressure gas cylinder. Thus, the high-pressure gas cylinder of the present invention includes the above-mentioned high-pressure gas cylinder sealing structure and a carbon fiber layer covering the outside of the liner body.

[0016] The beneficial effects of the present invention are as follows: (1) The liner body isolates the carbon fiber layer from the high-pressure gas cylinder sealing joint in a fully enclosed manner, avoiding contact between the carbon fiber layer and the high-pressure gas cylinder sealing joint, so that there will be no problem of galvanic corrosion; (2) When the sealing head tightly abuts the liner body airtightly, and the gas storage section of the liner body stores the high-pressure gas (such as high-pressure hydrogen, etc.), a gas storage closed area is directly formed between the liner body and the sealing head, so that the high-pressure gas cylinder sealing joint will not directly contact the high-pressure gas; (3) The liner body airtightly fills the groove of the high-pressure gas cylinder sealing joint, so that when the high-pressure gas cylinder of the present invention is moving or during the transmission of the high-pressure gas, the situation of high-pressure gas leakage caused by the generation of gaps between the high-pressure gas cylinder sealing joint and the liner body can be avoided, the sealing performance can be improved, and the possibility of the high-pressure gas in the cylinder being discharged can be reduced to improve the use safety; (4) The ribs can prevent the liner body from rotating and loosening; (5) The high-pressure gas cylinder sealing joint, its sealing structure and the high-pressure gas cylinder of the present invention can reduce the manufacturing cost and improve the production efficiency. Description of the Drawings

[0017] Figure 1is a partial cross-sectional view showing a first embodiment of the high-pressure gas cylinder sealing joint, its sealing structure and the high-pressure gas cylinder of the present invention, applicable to a sealing head. The high-pressure gas cylinder sealing joint includes a disc-shaped bottom, a neck, and a head;

[0018] Figure 2 is a partial cross-sectional view showing that in this first embodiment, the high-pressure gas cylinder includes the high-pressure gas cylinder sealing joint, a liner, and a carbon fiber layer;

[0019] Figure 3 is a side view showing the high-pressure gas cylinder sealing joint in this first embodiment;

[0020] Figure 4 is a bottom view showing the high-pressure gas cylinder sealing joint in this first embodiment;

[0021] Figure 5 is a cross-sectional view showing the high-pressure gas cylinder sealing joint in this first embodiment;

[0022] Figure 6 is a partial cross-sectional view showing a second embodiment of the high-pressure gas cylinder sealing joint, its sealing structure and the high-pressure gas cylinder of the present invention;

[0023] Figure 7 is a side view showing the high-pressure gas cylinder sealing joint in this second embodiment;

[0024] Figure 8 is a bottom view showing the high-pressure gas cylinder sealing joint in this second embodiment; and

[0025] Figure 9 is a perspective view showing the high-pressure gas cylinder sealing joint in this second embodiment. Detailed Description of the Embodiment

[0026] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0027] Refer to Figures 1 to 5 , a first embodiment of the high-pressure gas cylinder sealing joint 2, its sealing structure and the high-pressure gas cylinder of the present invention is applicable to a sealing head 8 having a sealing ring 81 and a high-pressure gas 9 (such as high-pressure hydrogen, etc.). In this first embodiment, the high-pressure gas cylinder of the present invention includes the high-pressure gas cylinder sealing joint 2, a liner 3, and a carbon fiber layer 4, and the high-pressure gas cylinder sealing structure of the present invention includes the high-pressure gas cylinder sealing joint 2 and the liner 3.

[0028] In this first embodiment, the high-pressure gas cylinder sealing joint 2 is integrally formed of a metal material and is detachably disposed at the vent 20 of the high-pressure gas cylinder, and includes a disc-shaped bottom 21, a neck 22, and a head 23. The disc-shaped bottom 21 has an upper surface 211 and a lower surface 212, and forms a plurality of grooves 210. The neck 22 is axially extended from the upper surface 211 of the disc-shaped bottom 21. The head 23 is axially extended from the upper end of the neck 22 opposite to the disc-shaped bottom 21. The neck 22 has a relatively reduced diameter compared to the head 23 and the disc-shaped bottom 21.

[0029] As Figure 4 , 5 shown, in this first embodiment, the grooves 210 on the lower surface 212 of the disc-shaped bottom 21 are two grooves 210 arranged in a concentric circle manner, and the grooves 210 on the upper surface 211 of the disc-shaped bottom 21 are also two grooves 210 arranged in a concentric circle manner.

[0030] In addition, in this first embodiment, the disc-shaped bottom 21 is provided with a plurality of through holes 214 penetrating from the upper surface 211 to the lower surface 212, for example, six through holes 214 arranged at equal angles and spaced apart as Figure 3 , 4 shown.

[0031] As Figure 1 , 2 , 5 shown, the material of the inner liner 3 is a polymer material, and it is injection molded onto the high-pressure gas cylinder sealing joint 2, and is divided into a gas storage section 31 for accommodating the high-pressure gas 9 and a joint section 32. The joint section 32 has a surrounding wall integrally extended from the gas storage section 31, and integrally covers the outer ring surfaces of the disc-shaped bottom 21 and the neck 22 of the high-pressure gas cylinder sealing joint 2.

[0032] In this first embodiment, the material of the inner liner 3 is high-density polyethylene (HDPE), and it is injection molded onto the high-pressure gas cylinder sealing joint 2, so that the inner liner 3 can be hermetically fitted to the grooves 210 and the through holes 214 on the disc-shaped bottom 21 of the high-pressure gas cylinder sealing joint 2.

[0033] In this first embodiment, the part of the inner liner 3 covering the lower surface 212 of the disc-shaped bottom 21 of the high-pressure gas cylinder sealing joint 2 hermetically fills the grooves 210 and the through holes 214 on the lower surface 212, and extends to the inner wall 213 of the vent of the disc-shaped bottom 21. Therefore, as Figure 1As shown, when the sealing head 8 is disposed at the vent 20 of the high-pressure gas cylinder sealing joint 2, since the sealing ring 81 tightly abuts against the inner liner 3 on the inner wall 213 of the vent, and the gas storage section 31 of the inner liner 3 stores the high-pressure gas 9 (such as high-pressure hydrogen, etc.), a gas storage closed area is directly formed between the inner liner 3 and the sealing head 8. Therefore, there will be no situation where the high-pressure gas cylinder sealing joint 2 directly contacts the high-pressure gas 9.

[0034] As for the part of the inner liner 3 that covers the upper surface 211 of the disc-shaped bottom 21 of the high-pressure gas cylinder sealing joint 2, it hermetically fills the grooves 210 and perforations 214 on the upper surface 211, and extends to the junction of the neck 22 and the head 23 of the high-pressure gas cylinder sealing joint 2.

[0035] In this first embodiment, the carbon fiber layer 4 is coated outside the inner liner 3 and does not cover any part of the high-pressure gas cylinder sealing joint 2. That is to say, the inner liner 3 isolates the carbon fiber layer 4 from the high-pressure gas cylinder sealing joint 2 in a fully covered manner to avoid contact between the carbon fiber layer 4 and the high-pressure gas cylinder sealing joint 2, so there will be no problem of galvanic corrosion.

[0036] Therefore, as Figure 1 、 3 shown, when the high-pressure gas cylinder sealing joint 2, its sealing structure and the high-pressure gas cylinder of the present invention are in the use state as Figure 1 shown, since the inner liner 3 hermetically fills the grooves 210 and perforations 214 of the high-pressure gas cylinder sealing joint 2 by injection molding (such as injection molding, etc.), when the high-pressure gas cylinder (such as a hydrogen storage cylinder) of the present invention is in movement or during the transmission of the high-pressure gas 9, it can avoid the leakage of the high-pressure gas 9 caused by the generation of gaps between the high-pressure gas cylinder sealing joint 2 and the inner liner 3.

[0037] Referring to Figures 6 to 9 , the main difference between the second embodiment of the high-pressure gas cylinder sealing joint 2, its sealing structure and the high-pressure gas cylinder of the present invention and the above first embodiment is that, in this second embodiment, several ribs 215 are further formed on the lower surface 212 of the disc-shaped bottom 21 of the high-pressure gas cylinder sealing joint 2, which are located between two of the grooves 210 on the lower surface 212 and are equally angularly spaced from each other, so as to prevent the inner liner 3 from rotating and loosening. For example, there can be eight ribs 215 as Figure 8 、 9 shown.

[0038] In addition, in this second embodiment, the grooves 210 on the lower surface 212 of the disc-shaped bottom 21 are four grooves 210 arranged in a concentric circle manner, and the grooves 210 on the upper surface 211 of the disc-shaped bottom 21 are also four grooves 210 arranged in a concentric circle manner. Furthermore, the perforations 214 can be, for example, twelve perforations 214 arranged at equal angular intervals as shown in Figure 8 , 9 .

[0039] In summary, the present invention has at least the following advantages and effects: (1) The inner liner 3 isolates the carbon fiber layer 4 from the high-pressure gas cylinder sealing joint 2 in a fully enclosed manner to prevent the carbon fiber layer 4 from contacting the high-pressure gas cylinder sealing joint 2, so that there will be no problem of galvanic corrosion; (2) When the sealing head 8 is disposed at the vent 20 of the high-pressure gas cylinder sealing joint 2, the sealing ring 81 tightly abuts the inner liner 3 on the inner wall 213 of the vent, and the high-pressure gas 9 (such as high-pressure hydrogen, etc.) is stored in the gas storage section 31 of the inner liner 3, a gas storage closed area is directly formed between the inner liner 3 and the sealing head 8, so that the high-pressure gas cylinder sealing joint 2 will not directly contact the high-pressure gas 9; (3) The inner liner 3 is hermetically filled into the grooves 210 and perforations 214 of the high-pressure gas cylinder sealing joint 2 by injection molding (such as injection molding, etc.), so that when the high-pressure gas cylinder (such as a hydrogen storage cylinder) of the present invention is in the moving process or during the transmission of the high-pressure gas 9, the leakage of the high-pressure gas 9 caused by the generation of a gap between the high-pressure gas cylinder sealing joint 2 and the inner liner 3 can be avoided, the sealing performance is improved, and the possibility of the high-pressure gas 9 discharged from the cylinder can be reduced to improve the use safety; (4) In the second embodiment, the rib 215 can prevent the inner liner 3 from rotating and loosening; (5) The high-pressure gas cylinder sealing joint 2, its sealing structure and the high-pressure gas cylinder of the present invention can reduce the manufacturing cost and improve the production efficiency; thus, the purpose of the present invention can be truly achieved.

Claims

1. A high-pressure gas cylinder sealing joint, detachably arranged on the vent of the high-pressure gas cylinder, characterized in that: The high-pressure gas cylinder sealing joint comprises: A disc-shaped bottom having an upper surface and a lower surface and formed with a plurality of grooves; a neck portion formed by axially extending the upper surface of the disc-shaped bottom portion; and a head formed by an axial extension of the upper end of the neck opposite to the disc-shaped bottom; The neck has a relatively reduced diameter compared to the head and the disc-shaped bottom.

2. The high pressure gas cylinder sealing joint according to claim 1, characterized in that: The disc-shaped bottom is provided with a plurality of through holes penetrating from the upper surface to the lower surface.

3. The high pressure gas cylinder sealing joint according to claim 1, characterized in that: The grooves on the lower surface of the disc-shaped bottom are several grooves arranged in a concentric circle manner, and the lower surface is also formed with several ribs located between two of the grooves on the lower surface and spaced from each other.

4. The high-pressure gas cylinder sealing joint according to claim 1, characterized in that: The disc-shaped bottom is provided with a plurality of through holes penetrating from the upper surface to the lower surface. The grooves on the lower surface of the disc-shaped bottom are a plurality of grooves arranged in a concentric circle manner. The lower surface is also formed with a plurality of ribs located between two of the grooves on the lower surface and spaced apart from each other.

5. The high pressure gas cylinder sealing joint according to claim 1, characterized in that: The disc-shaped bottom, the neck and the joint are integrally formed of metal material.

6. A high-pressure gas cylinder sealing structure having a high-pressure gas cylinder sealing joint according to any one of claims 1 to 5, characterized in that: Also features: The lining body is divided into an air storage section and a joint section. The joint section has a surrounding wall integrally extending from the air storage section. The surrounding wall integrally covers the disc-shaped bottom of the joint and the outer annular surface of the neck.

7. The high pressure gas cylinder sealing structure according to claim 6, characterized in that: The lining body is made of polymer material and is injection molded onto the high-pressure gas cylinder sealing joint so that the lining body can fit the groove of the disc-shaped bottom of the high-pressure gas cylinder sealing joint in an airtight manner.

8. The high pressure gas cylinder sealing structure according to claim 6, characterized in that: The portion of the lining body covering the lower surface of the disc-shaped bottom of the high-pressure gas cylinder sealing joint air-tightly fills the groove on the lower surface and extends to the inner wall of the vent of the disc-shaped bottom.

9. The high pressure gas cylinder sealing structure according to claim 6, characterized in that: The portion of the lining body covering the upper surface of the disc-shaped bottom of the high-pressure gas cylinder sealing joint airtightly fills the groove on the upper surface and extends to the junction of the neck and the head of the joint.

10. A high-pressure gas cylinder, characterized in that: The invention comprises a sealing structure for a high-pressure gas cylinder as claimed in any one of claims 6 to 9, and a carbon fiber layer coated on the outside of the inner liner.

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