阅读说明：本技术 一种用于ⅳ型储氢气瓶的boss结构 (BOSS structure for IV-type hydrogen storage cylinder ) 是由 李曰兵 朱吉琦 高增梁 戴云岭 汪志欣 何兴 于 2021-07-06 设计创作，主要内容包括：一种用于Ⅳ型储氢气瓶的BOSS结构,属于储氢气瓶技术领域。它包括塑料内胆,塑料内胆的内侧配合设置有内衬,塑料内胆的外侧配合设置有外衬,外衬的外侧设有纤维缠绕层,内衬与外衬之间紧固连接以夹紧塑料内胆,内衬与塑料内胆之间、外衬与塑料内胆之间均设有密封件。本发明中,内衬与外衬通过紧固连接将塑料内胆夹紧安装；第二矩形外衬凸起与第一矩形凹槽之间、内衬矩形凸起与第二矩形凹槽之间采用过盈配合,能够加强外衬、内衬与塑料内胆之间的密封性能；通过设置的第一外接密封槽、第二外界密封槽,可以加强本结构与外部连接管路之间的密封性能；通过设置的第一矩形外衬凸起,可以在缠绕纤维缠绕层时,提供缠绕着力点。(A BOSS structure for IV-type hydrogen storage cylinder belongs to the technical field of hydrogen storage cylinder. The plastic liner comprises a plastic liner, wherein an inner liner is arranged on the inner side of the plastic liner in a matched mode, an outer liner is arranged on the outer side of the plastic liner in a matched mode, a fiber winding layer is arranged on the outer side of the outer liner, the inner liner and the outer liner are fixedly connected to clamp the plastic liner tightly, and sealing elements are arranged between the inner liner and the plastic liner and between the outer liner and the plastic liner. In the invention, the inner liner and the outer liner are tightly connected to clamp and mount the plastic inner liner; the second rectangular outer lining bulge and the first rectangular groove and the inner lining rectangular bulge and the second rectangular groove are in interference fit, so that the sealing performance among the outer lining, the inner lining and the plastic inner container can be enhanced; the sealing performance between the structure and an external connecting pipeline can be enhanced through the arranged first external sealing groove and the second external sealing groove; the first rectangular outer lining bulge is arranged, so that a winding force application point can be provided when the fiber winding layer is wound.)

1. A BOSS structure for type IV hydrogen storage cylinders is characterized in that: including plastics inner bag (1), the inboard cooperation of plastics inner bag (1) is provided with inside lining (2), and the outside cooperation of plastics inner bag (1) is provided with outer lining (4), the outside of outer lining (4) is equipped with fibre winding layer (3), fastening connection is in order to press from both sides tight plastics inner bag (1) between inside lining (2) and outer lining (4).

2. The BOSS structure for the IV-type hydrogen storage cylinder according to claim 1, characterized in that the inner side wall and the outer side wall of the plastic liner (1) are respectively provided with a first rectangular groove (11) and a second rectangular groove (12).

3. The BOSS structure for the IV-type hydrogen storage cylinder according to claim 2, wherein the liner (2) comprises a liner main body and a liner opening, the end part of the liner opening is provided with a raised annular structure, the outer side of the annular structure is provided with an external thread (23), the inner side wall of the liner opening is provided with a first internal thread (25), the end surface of the liner opening is provided with a first external sealing groove (24), the outer side of the liner opening is provided with a liner sealing groove (22), and the outer side of the liner main body is provided with a liner rectangular protrusion (21) matched with the second rectangular groove (12).

4. The BOSS structure for the IV-type hydrogen storage cylinder according to claim 3, wherein the outer liner (4) comprises an outer liner main body and an outer liner opening, a second outer seal groove (43) is arranged on the end face of the outer liner opening, an outer liner internal thread (44) matched with the external thread (23) is arranged on the inner side of the outer liner opening, an outer liner seal groove (45) is formed in the inner side wall of the outer liner opening, a first rectangular outer liner bulge (42) is arranged on the outer side wall of the outer liner opening, and a second rectangular outer liner bulge (41) matched with the first rectangular groove (11) is arranged on the inner side wall of the outer liner main body.

5. A BOSS structure for a cylinder for hydrogen storage of the IV type according to claim 4, characterised in that the end of the external lining mouth is provided with an annular convex structure for limiting the filament winding (3).

6. A BOSS structure for a type-IV hydrogen storage cylinder according to claim 4, characterized in that the fiber winding layer (3) is closely attached to the outer side wall of the outer liner (4), and the inner side of the fiber winding layer (3) is located at the first rectangular outer liner protrusion (42) to form a winding layer groove (31).

7. A BOSS structure for a cylinder for storing hydrogen of type IV according to claim 4, characterized in that the interference fit is provided between the first rectangular groove (11) and the second rectangular outer lining protrusion (41), and between the inner lining rectangular protrusion (21) and the second rectangular groove (12).

8. A BOSS structure for a cylinder for storing hydrogen of type IV according to claim 4, characterised in that sealing elements are provided between the inner liner (2) and the plastic inner container (1), and between the outer liner (4) and the plastic inner container (1).

9. A BOSS structure for a cylinder for hydrogen storage gas of type IV according to claim 8, characterized in that the sealing members are provided in the liner sealing groove (22) and the outer liner sealing groove (45), the sealing members comprising an O-ring (5) and a retainer ring (6) provided outside the O-ring (5).

Technical Field

The invention belongs to the technical field of hydrogen storage cylinders, and particularly relates to a BOSS structure for a IV-type hydrogen storage cylinder.

Background

Hydrogen energy has attracted attention as an excellent clean energy source, and various countries have vigorously made developments on the use of hydrogen energy. In China, the field of hydrogen energy automobiles is developing vigorously, and the gas sealing problem of the sealing structure of the bottle mouth of the vehicle-mounted hydrogen storage cylinder is still a problem to be solved urgently in combination with the practical application condition of hydrogen energy in the automobile industry,

because of the requirements of strength and rigidity, the bottle mouth of the IV-type hydrogen storage bottle needs to be designed by adopting a metal material, and in a plurality of patent technologies at present, the connection of the bottle mouth of the plastic liner is mostly formed directly by adopting a blow molding process or welded connection. The blow molding process adopts a mode of directly wrapping metal and plastic, so that the plastic and the metal are not firmly connected, the two materials are easily layered to cause leakage, and a welding seam can be formed at the position of the opening of the liner in a welding mode to form a leakage point of the gas cylinder. The design of a high-efficiency and stable BOSS sealing structure is an important research direction for the research and development of the liner of the IV-type hydrogen storage cylinder.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a BOSS structure which has a stable structure and good sealing performance and is suitable for IV-type hydrogen storage cylinders.

The invention provides the following technical scheme: a BOSS structure for type IV hydrogen storage cylinders is characterized in that: the plastic liner comprises a plastic liner, wherein a lining is arranged on the inner side of the plastic liner in a matched mode, an outer lining is arranged on the outer side of the plastic liner in a matched mode, a fiber winding layer is arranged on the outer side of the outer lining, and the lining and the outer lining are fixedly connected to clamp the plastic liner tightly.

The BOSS structure for the IV-type hydrogen storage cylinder is characterized in that a first rectangular groove and a second rectangular groove are respectively formed in the inner side wall and the outer side wall of the plastic inner container.

The BOSS structure for the IV-type hydrogen storage cylinder is characterized in that the lining comprises a lining main body and a lining opening, the end part of the lining opening is provided with a raised annular structure, the outer side of the annular structure is provided with external threads, the inner side wall of the lining opening is provided with first internal threads, a first external sealing groove is arranged on the end face of the lining opening, the outer side of the lining opening is provided with a lining sealing groove, and the outer side of the lining main body is provided with a lining rectangular protrusion matched with the second rectangular groove.

The BOSS structure for the IV-type hydrogen storage cylinder is characterized in that the outer liner comprises an outer liner main body and an outer liner opening, a second outer seal groove is formed in the end face of the outer liner opening, an outer liner internal thread matched with the external thread is arranged on the inner side of the outer liner opening, an outer liner seal groove is formed in the inner side wall of the outer liner opening, a first rectangular outer liner protrusion is arranged on the outer side wall of the outer liner opening, and a second rectangular outer liner protrusion matched with the first rectangular groove is formed in the inner side wall of the outer liner main body.

The BOSS structure for the IV-type hydrogen storage cylinder is characterized in that an annular convex structure is arranged at the end part of the outer lining opening and used for limiting the fiber winding layer.

The BOSS structure for the IV-type hydrogen storage cylinder is characterized in that the fiber winding layer is arranged close to the side wall of the outer side of the outer liner, and the inner side of the fiber winding layer is positioned at the bulge of the first rectangular outer liner to form a winding layer groove.

The BOSS structure for the IV-type hydrogen storage cylinder is characterized in that interference fit is formed between the first rectangular groove and the second rectangular outer lining protrusion, and between the inner lining rectangular protrusion and the second rectangular groove.

The BOSS structure for the IV-type hydrogen storage cylinder is characterized in that sealing pieces are arranged between the inner liner and the plastic inner container and between the outer liner and the plastic inner container.

The BOSS structure for the IV-type hydrogen storage cylinder is characterized in that the sealing elements are arranged in the lining sealing groove and the outer lining sealing groove and comprise an O-shaped ring and a retaining ring arranged on the outer side of the O-shaped ring.

By adopting the technology, compared with the prior art, the invention has the following beneficial effects:

1) in the invention, the inner liner and the outer liner are tightly connected to generate pressing force so as to clamp and install the plastic inner liner;

2) in the invention, the interference fit design is adopted between the second rectangular outer lining bulge and the first rectangular groove and between the inner lining rectangular bulge and the second rectangular groove, so that the sealing performance between the outer lining and the plastic inner container and between the inner lining and the plastic inner container can be enhanced;

3) in the invention, the sealing elements are arranged between the inner liner and the plastic inner container and between the outer liner and the plastic inner container, so that the sealing performance of the structure is further improved;

4) in the invention, the end surfaces of the inner lining and the outer lining opening part are respectively provided with a first external sealing groove and a second external sealing groove, so that the sealing performance between the structure and an external connecting pipeline can be enhanced;

5) according to the invention, the first rectangular outer lining bulge is arranged, so that a winding force application point can be provided when the fiber winding layer is wound.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged view of the structure at A in FIG. 1

FIG. 3 is a schematic view of the plastic liner of the present invention;

FIG. 4 is a schematic view of the liner construction of the present invention;

FIG. 5 is a schematic view of the structure of the outer liner of the present invention

FIG. 6 is a schematic view of a filament winding arrangement of the present invention;

fig. 7 is an exploded view of the overall structure of the present invention.

In the figure: 1. a plastic inner container; 11. a first rectangular groove; 12. a second rectangular groove; 2. a liner; 21. a lining rectangular bulge; 22. a lining sealing groove; 23. an external thread; 24. a first external seal groove; 25. a first internal thread; 3. a fiber winding layer; 31. a winding layer groove; 4. an outer liner; 41. a second rectangular outer lining projection; 42. a first rectangular outer liner protrusion; 43. a second outer perimeter seal groove; 44. an external lining internal thread; 45. an outer liner seal groove; 5. an O-shaped ring; 6. and a retainer ring.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

On the contrary, the invention is intended to cover alternatives, modifications, equivalents and alternatives which may be included within the spirit and scope of the invention as defined by the appended claims. Furthermore, in the following detailed description of the present invention, certain specific details are set forth in order to provide a better understanding of the present invention. It will be apparent to one skilled in the art that the present invention may be practiced without these specific details.

Referring to fig. 1-7, a BOSS structure for a type iv hydrogen storage cylinder, as shown in fig. 1 and 6, comprises a plastic liner 1, an inner liner 2, a fiber winding layer 3 and an outer liner 4, wherein the outer liner 4 is arranged at the outer side of the plastic liner 1 in a matching manner, and the inner liner 2 is arranged at the inner side of the plastic liner 1 in a matching manner.

As shown in fig. 2, the inner side wall and the outer side wall of the plastic inner container 1 are respectively provided with a first rectangular groove 11 and a second rectangular groove 12.

As shown in fig. 3, the lining 2 includes a lining main body and a lining opening, the end of the lining opening is provided with a raised annular structure, the outer side of the annular structure is provided with an external thread 23, the inner side wall of the lining opening is provided with a first internal thread 25, the end face of the lining opening is provided with a first external seal groove 24, the outer side of the lining opening is provided with a lining seal groove 22, and the outer side of the lining main body is provided with a lining rectangular protrusion 21 matched with the second rectangular groove 12.

As shown in fig. 4, the outer liner 4 includes an outer liner main body and an outer liner opening, an end of the outer liner opening is provided with an annular protrusion structure, an end face of the outer liner opening is provided with a second outer seal groove 43, an inner side of the outer liner opening is provided with an outer liner internal thread 44 matched with the external thread 23, an inner side wall of the outer liner opening is provided with an outer liner seal groove 45, an outer side wall of the outer liner opening is provided with a first rectangular outer liner protrusion 42, and an inner side wall of the outer liner main body is provided with a second rectangular outer liner protrusion 41 matched with the first rectangular groove 11.

As shown in FIG. 5, the fiber winding layer 3 is closely attached to the outer side wall of the outer liner 4, and the winding layer groove 31 is formed at the first rectangular outer liner protrusion 42 at the inner side of the fiber winding layer 3.

And sealing elements are arranged in the inner lining sealing groove 22 and the outer lining sealing groove 45 respectively, and comprise an O-shaped ring 5 and a retainer ring 6 arranged on the outer side of the O-shaped ring 5.

Wherein, carry out fixed connection through the cooperation structure of external screw thread 23 with outer lining internal thread 44 between outer lining 4 and the inside lining 2, be connected plastics inner bag 1, outer lining 4 and inside lining 2 and form a whole, strengthened the intensity and the stability of being connected between plastics inner bag 1, outer lining 4 and the inside lining 2.

Interference fit is adopted between the second rectangular outer lining bulge 41 and the first rectangular groove 11, and between the second rectangular groove 12 and the lining rectangular bulge 21, so that the sealing performance of the interface of the heterogeneous material is enhanced.

Inside lining seal groove 22, all be equipped with the sealing member in the outer lining seal groove 45, the sealing member is including placing the O type circle 5 that corresponds the inslot and set up the retaining ring 6 in the O type circle 5 outside, can seal between inside lining 2 and the plastics inner bag 1, between outer lining 4 and the plastics inner bag 1 through the O type circle 5 that sets up, makes O type circle 56 can not extrude corresponding seal groove and lead to corresponding department's sealed inefficacy by high-pressure gas through the retaining ring 6 that sets up.

The first rectangular outer liner protrusion 42 is provided to provide a winding force point when winding the filament winding layer 3.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.