Sealing structure of high-pressure composite container and high-pressure composite container
阅读说明:本技术 高压复合容器的密封结构及高压复合容器 (Sealing structure of high-pressure composite container and high-pressure composite container ) 是由 姜林 刘亮 吕昊 诺伯特·菲尔兹 徐恪 于 2019-11-08 设计创作,主要内容包括:本发明公开了一种高压复合容器的密封结构及高压复合容器,其中,该密封结构包括金属端头和承压结构;其中,金属端头上设置有密封部,密封部上设置有平面密封结构,密封部伸入至高压复合容器的塑料内胆中后,平面密封结构密封抵接在塑料内胆的内壁上;承压结构固定套设在金属端头上,且承压结构压紧在塑料内胆的外壁上。本发明实施例提供的高压复合容器的密封结构及高压复合容器,可以通过平面密封结构的自身变形来弥补塑料内胆上的粗糙度不足,从而可以保证金属端头与塑料内胆配合处的密封性,并通过承压结构和金属端头的配合,防止了金属端头的松动,保证了密封性。(The invention discloses a sealing structure of a high-pressure composite container and the high-pressure composite container, wherein the sealing structure comprises a metal end head and a pressure-bearing structure; the metal end is provided with a sealing part, the sealing part is provided with a plane sealing structure, and the plane sealing structure is in sealing and abutting joint with the inner wall of the plastic inner container after the sealing part extends into the plastic inner container of the high-pressure composite container; the bearing structure is fixedly sleeved on the metal end head and is tightly pressed on the outer wall of the plastic inner container. The sealing structure of the high-pressure composite container and the high-pressure composite container provided by the embodiment of the invention can make up the defect of insufficient roughness on the plastic liner through the self deformation of the plane sealing structure, thereby ensuring the sealing property of the matching part of the metal end head and the plastic liner, preventing the metal end head from loosening through the matching of the pressure-bearing structure and the metal end head, and ensuring the sealing property.)
1. A sealing structure of a high-pressure composite container, comprising:
the sealing structure comprises a metal end head, a sealing part and a sealing part, wherein the metal end head is provided with a sealing part, the sealing part is provided with a plane sealing structure, and the plane sealing structure is in sealing and abutting joint with the inner wall of a plastic inner container after the sealing part extends into the plastic inner container of the high-pressure composite container;
the bearing structure is fixedly sleeved on the metal end head and is tightly pressed on the outer wall of the plastic inner container.
2. The seal structure of a high-pressure composite container according to claim 1, wherein said seal portion is elliptical.
3. A sealing structure of a high pressure composite container according to claim 2, wherein a fixing groove for fixing the flat sealing structure is provided on the sealing portion, and the flat sealing structure protrudes from the surface of the sealing portion after being provided in the fixing groove.
4. The sealing structure of a high-pressure composite container according to claim 1, further comprising a backing plate, wherein the backing plate is sleeved on the metal end, one surface of the backing plate abuts against the outer wall of the plastic liner, and the other surface of the backing plate abuts against the pressure-bearing structure.
5. The seal structure of a high-pressure composite container according to claim 4, wherein said pressure-bearing structure is threadedly connected to said metal end;
the pressure-bearing structure is provided with a clamping groove matched with the backing plate, and the depth of the clamping groove is smaller than the thickness of the backing plate.
6. The sealing structure of a high-pressure composite container according to claim 4, further comprising a cover, wherein the cover is fixedly sleeved on the metal end head, and the cover is tightly pressed on the bearing structure.
7. The sealing structure of a high-pressure composite container according to claim 6, wherein the metal end head is further provided with a first neck portion and a second neck portion, one end of the first neck portion is fixedly connected with the second neck portion, and the other end of the second neck portion is fixedly connected with the sealing portion;
the diameter of the first neck part is smaller than that of the second neck part, the sealing cover is fixedly sleeved on the first neck part, and the sealing cover abuts against the second neck part and the pressure-bearing structure;
the second neck comprises a threaded section and a smooth section, the second neck is fixedly connected with the pressure-bearing structure through the threaded section, and the backing plate is fixedly sleeved on the smooth section.
8. The sealing structure of the high-pressure composite container according to claim 7, wherein the outer surfaces of the sealing cover and the pressure-bearing structure are both arc surfaces, and after the sealing cover, the pressure-bearing structure and the plastic liner are matched, the arc surfaces of the sealing cover, the pressure-bearing structure and the plastic liner form a continuous arc surface.
9. A high-pressure composite container, comprising a plastic liner and a cylinder valve, wherein the plastic liner is provided with an opening, the cylinder valve is arranged in the opening and used for closing the opening, the high-pressure composite container is characterized by further comprising a sealing structure of the high-pressure composite container according to any one of claims 1 to 8, and after the sealing part extends into the opening, the plane sealing structure is in sealing and abutting joint with the inner wall of the plastic liner;
the metal end is provided with a fixing hole, and the cylinder valve is fixedly arranged in the fixing hole.
Technical Field
The invention relates to a composite container, in particular to a sealing structure of a high-pressure composite container and the high-pressure composite container.
Background
At present, a large number of high-pressure containers are widely used in daily life, and the traditional pure metal or metal lining composite container has the problem of heavy weight and is difficult to transport; and the higher the storage pressure is, the more complicated the production process of the metal plastic liner is, the higher the cost is, and the risk of being corroded by high-pressure gas also exists. In order to meet the requirement of light weight, a high-pressure plastic liner composite container is produced, and due to the characteristics of plastics, the product has excellent performances of corrosion resistance, fatigue resistance, light weight and the like. Compared with a pure metal or metal lining composite container, the tightness of the high-pressure plastic liner composite container is guaranteed more rigorously, the surface roughness after the blow molding of the plastic liner is unstable, the connection strength between the plastic liner and a metal end is easy to reduce, the connection between the plastic liner and the metal end can be loosened in the repeated use process, the sealing performance is reduced, meanwhile, the local stress concentration on the plastic liner is easy to cause, and the fatigue resistance is reduced.
Disclosure of Invention
The invention aims to provide a sealing structure of a high-pressure composite container and the high-pressure composite container, which are used for solving the problems in the prior art, preventing a metal end from loosening after long-term use and ensuring the matching sealing performance of the metal end and a plastic inner container.
The invention provides a sealing structure of a high-pressure composite container, which comprises:
the sealing structure comprises a metal end head, a sealing part and a sealing part, wherein the metal end head is provided with a sealing part, the sealing part is provided with a plane sealing structure, and the plane sealing structure is in sealing and abutting joint with the inner wall of a plastic inner container after the sealing part extends into the plastic inner container of the high-pressure composite container;
the bearing structure is fixedly sleeved on the metal end head and is tightly pressed on the outer wall of the plastic inner container.
The sealing structure of a high-pressure composite container as described above, wherein the sealing portion is preferably oval.
The sealing structure of the high pressure composite container as described above, wherein preferably, the sealing portion is provided with a fixing groove for fixing the planar sealing structure, and the planar sealing structure protrudes from the surface of the sealing portion after being disposed in the fixing groove.
The sealing structure of the high-pressure composite container preferably further comprises a backing plate, the backing plate is sleeved on the metal end, one surface of the backing plate abuts against the outer wall of the plastic liner, and the other surface of the backing plate abuts against the pressure-bearing structure.
The sealing structure of the high-pressure composite container as described above, wherein preferably, the pressure-bearing structure is in threaded connection with the metal end;
the pressure-bearing structure is provided with a clamping groove matched with the backing plate, and the depth of the clamping groove is smaller than the thickness of the backing plate.
The sealing structure of the high-pressure composite container preferably further comprises a sealing cover, wherein the sealing cover is fixedly sleeved on the metal end head, and the sealing cover is tightly pressed on the pressure-bearing structure.
The sealing structure of the high-pressure composite container as described above, wherein preferably, the metal end head is further provided with a first neck portion and a second neck portion, one end of the first neck portion is fixedly connected with the second neck portion, and the other end of the second neck portion is fixedly connected with the sealing portion;
the diameter of the first neck part is smaller than that of the second neck part, the sealing cover is fixedly sleeved on the first neck part, and the sealing cover abuts against the second neck part and the pressure-bearing structure;
the second neck comprises a threaded section and a smooth section, the second neck is fixedly connected with the pressure-bearing structure through the threaded section, and the backing plate is fixedly sleeved on the smooth section.
The sealing structure of the high-pressure composite container is characterized in that the outer surfaces of the sealing cover and the pressure-bearing structure are arc surfaces, and after the sealing cover, the pressure-bearing structure and the plastic liner are matched, the arc surfaces of the sealing cover, the pressure-bearing structure and the plastic liner form a continuous arc surface.
The invention also provides a high-pressure composite container, which comprises a plastic inner container and a bottle valve, wherein the plastic inner container is provided with an opening, the bottle valve is arranged in the opening and is used for sealing the opening, the high-pressure composite container also comprises a sealing structure of the high-pressure composite container, and after the sealing part extends into the opening, the plane sealing structure is in sealing and abutting joint with the inner wall of the plastic inner container;
the metal end is provided with a fixing hole, and the cylinder valve is fixedly arranged in the fixing hole.
According to the sealing structure of the high-pressure composite container and the high-pressure composite container, provided by the invention, the defect of the roughness on the plastic inner container can be made up through the self deformation of the plane sealing structure, so that the sealing property of the matching part of the metal end and the plastic inner container can be ensured; meanwhile, through the matching of the pressure-bearing structure and the metal end, the inner wall and the outer wall of the plastic liner can be supported, the part of the plastic liner, which is positioned at the opening position, is prevented from deforming due to the change of pressure or temperature, and the metal end is prevented from loosening after being used for a long time; in addition, the pressure-bearing structure can share the pressure from the inside of the plastic liner, and reduce the load born by the side wall of the plastic liner, thereby ensuring the compression resistance and fatigue resistance of the plastic liner.
Furthermore, the abrasion of the pressure-bearing structure on the plastic inner container is avoided by arranging the base plate, and meanwhile, the plane sealing structure can only bear axial stress and cannot bear torsion generated by friction between the pressure-bearing structure and the plastic inner container, so that the looseness of the metal end after long-term use is avoided, and the sealing effect of the plane sealing structure is ensured.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic view of a sealing arrangement for a high pressure composite vessel provided by an embodiment of the present invention;
FIG. 2 is an exploded view of a sealing arrangement of a high pressure composite container provided by an embodiment of the present invention;
fig. 3 is an enlarged view at a in fig. 1.
Description of reference numerals:
100-plastic inner container 200-pressure-bearing structure 300-metal end
310-sealing part 311-fixing groove 320-first neck part
330-second neck 400-planar seal structure 500-shim plate
600-sealing cover 700-cylinder valve 710-large diameter section
720-small diameter section 810-axial sealing structure 820-radial sealing structure
830-gap
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
Referring to fig. 1 to 3, an embodiment of the present invention provides a sealing structure of a high-pressure composite container, which includes a
In the use process of the sealing structure provided by this embodiment, the
More importantly, the inner wall of the
Further, the
Further, as shown in fig. 1 and 2, a
Further, the sealing structure further comprises a
In order to ensure the reliability of the connection between the pressure-bearing
Specifically, can be provided with on the
Further, as shown in fig. 1, the sealing structure further includes a
Further, as shown in fig. 1 and 2, the
Further, as shown in fig. 1, the outer surfaces of the
The embodiment of the invention also provides a high-pressure composite container, which comprises a plastic
The
Wherein,
It is understood that, as shown in fig. 1, a first step may be formed between the
According to the sealing structure of the high-pressure composite container and the high-pressure composite container, provided by the embodiment of the invention, the defect of the roughness on the plastic inner container can be made up through the self deformation of the plane sealing structure, so that the sealing property of the matching part of the metal end and the plastic inner container can be ensured; meanwhile, through the matching of the pressure-bearing structure and the metal end, the inner wall and the outer wall of the plastic liner can be supported, the part of the plastic liner, which is positioned at the opening position, is prevented from deforming due to the change of pressure or temperature, and the metal end is prevented from loosening after being used for a long time; in addition, the pressure-bearing structure can share the pressure from the inside of the plastic liner, and reduce the load born by the side wall of the plastic liner, thereby ensuring the compression resistance and fatigue resistance of the plastic liner.
Furthermore, the abrasion of the pressure-bearing structure on the plastic inner container is avoided by arranging the base plate, and meanwhile, the plane sealing structure can only bear axial stress and cannot bear torsion generated by friction between the pressure-bearing structure and the plastic inner container, so that the looseness of the metal end after long-term use is avoided, and the sealing effect of the plane sealing structure is ensured.
The construction, features and functions of the present invention are described in detail in the embodiments illustrated in the drawings, which are only preferred embodiments of the present invention, but the present invention is not limited by the drawings, and all equivalent embodiments modified or changed according to the idea of the present invention should fall within the protection scope of the present invention without departing from the spirit of the present invention covered by the description and the drawings.
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