CN215259183U - Bottleneck structure of plastic liner fiber winding gas cylinder - Google Patents

Abstract

The utility model discloses a more reliable and stable bottleneck structure of plastics inner bag fibre winding gas cylinder, include: the bottle comprises an inner bottleneck made of metal, an outer bottleneck made of plastic wraps the inner bottleneck, the outer bottleneck is connected to one end of a plastic liner in a sealing mode, a fiber reinforcing layer and a fiber protective layer are arranged on the outer walls of the outer bottleneck and the plastic liner from inside to outside, a plurality of embedding grooves are circumferentially arranged on the outer wall of the upper section of the inner bottleneck at intervals, and an annular embedding block protruding outwards is arranged on the outer wall of the bottom of the inner bottleneck; the outer bottleneck includes: go up straight section of thick bamboo section and straight section of thick bamboo section down, go up the inner wall of straight section of thick bamboo section and go up the circumference interval and be equipped with a plurality of embedding lug, be equipped with epitaxial connector between the upper and lower straight section of thick bamboo section of outer bottleneck, be equipped with the annular embedded groove of closely wrapping up annular embedded piece in the epitaxial connector, outer bottleneck and interior bottleneck assembly back, during each embedding recess of each embedding lug one-to-one embedding, in the annular embedded piece embedding annular embedded groove, and closely laminating connection between outer bottleneck and the interior bottleneck that corresponds.

Description

Bottleneck structure of plastic liner fiber winding gas cylinder

Technical Field

The utility model relates to a hydrogen storage pressure vessel technical field, concretely relates to bottleneck structure of plastics inner bag fibre winding gas cylinder.

Background

At present, the general hydrogen storage cylinder for the vehicle in the market mainly comprises an aluminum liner fiber winding cylinder and a plastic liner fiber winding cylinder, wherein the plastic liner fiber winding cylinder has the advantages of light weight, high mass hydrogen storage density, one third to two thirds of the mass of the plastic liner fiber winding cylinder can be reduced compared with the aluminum liner fiber winding cylinder under the same volume and pressure, and the like, so that the general hydrogen storage cylinder for the vehicle is widely applied. The plastic liner in the gas cylinder is integrally manufactured and molded by winding fibers on the plastic liner, and an outer bottle opening made of plastic is arranged at least one end of the plastic liner. The outer walls of the plastic inner container and the outer bottle mouth are provided with a fiber reinforced layer and a fiber protective layer from inside to outside, the fiber reinforced layer is usually formed by winding carbon fibers, the fiber protective layer is usually formed by winding glass fibers, the fiber reinforced layer is tightly connected with the plastic inner container and used for enhancing the strength of the plastic inner container, and the fiber protective layer plays a role in protecting the fiber reinforced layer. Because the strength of the plastic outer bottle mouth is insufficient, the metal inner bottle mouth needs to be wrapped in the outer bottle mouth. The connection mode of the plastic outer bottle mouth, the metal inner bottle mouth and the plastic inner container is as follows: when the outer bottle mouth is formed by adopting a blow molding process, the outer bottle mouth is directly wrapped on the outer wall of the inner bottle mouth and then welded at one end of the plastic inner container after being formed. Because the coefficient of thermal expansion and the elastic modulus of the outer bottleneck of metal material's interior bottleneck and plastics material differ great, appear easily when the pressure change in bad road conditions and external temperature change, the inner bag and be connected not firm defect between interior bottleneck and the outer bottleneck, use a period of time after, still can appear the defect that breaks away from between outer bottleneck and the plastics inner bag for the life of the plastics inner bag fibre winding gas cylinder that has above-mentioned bottleneck structure is shorter.

SUMMERY OF THE UTILITY MODEL

The utility model aims at: the bottle mouth structure of the gas bottle with the plastic liner wound with fibers is more stable and reliable, so that the service life of the gas bottle is longer.

In order to achieve the above object, the utility model adopts the following technical scheme: a bottleneck structure of a plastic liner fiber-wound gas cylinder comprises: the bottle comprises an inner bottleneck made of metal, an outer bottleneck made of plastic wraps the inner bottleneck, the outer bottleneck is connected to one end of a plastic liner in a sealing mode, a fiber reinforcing layer and a fiber protective layer are arranged on the outer walls of the outer bottleneck and the plastic liner from inside to outside, a plurality of embedding grooves are circumferentially arranged on the outer wall of the upper section of the inner bottleneck at intervals, and an annular embedding block protruding outwards is arranged on the outer wall of the bottom of the inner bottleneck; the outer bottleneck includes: go up straight section of thick bamboo section and straight section of thick bamboo section down, circumference interval is provided with a plurality of embedding lug on the inner wall of going up straight section of thick bamboo section, embedding lug and embedding recess are the one-to-one respectively and mutually support, be provided with epitaxial connector between the upper and lower straight section of thick bamboo section of outer bottleneck, be provided with the annular embedded groove of inseparable parcel annular embedded piece in the epitaxial connector, outer bottleneck and interior bottleneck assembly back, each embedding lug one-to-one imbeds in each embedding recess, in the annular embedded groove of annular embedded piece embedding, and closely laminate between the interior bottleneck of outer bottleneck and correspondence and be connected.

Further, aforementioned bottleneck structure of plastic inner bag fibre winding gas cylinder, wherein: the combination surface of the outer bottle mouth which is jointed with the plastic inner container is provided with a plurality of convex teeth, and the outer bottle mouth is sealed with the plastic inner container by the mutual welding of the convex teeth.

Further, aforementioned bottleneck structure of plastic inner bag fibre winding gas cylinder, wherein: the section of the convex teeth is triangular or semicircular or trapezoidal.

Further, aforementioned bottleneck structure of plastic inner bag fibre winding gas cylinder, wherein: the upper surface of annular embedding piece is the decurrent inclined plane of the outside extension of outer wall from interior bottleneck bottom, and the lower surface of annular embedding piece is the bottom surface of following interior bottleneck and outwards extending and the convex arcwall face of downwarping, and the lower surface of annular embedding piece begins to draw close with the upper surface of annular embedding piece from inside to outside upwards gradually from the bottom of the curved protrusion of annular embedding piece and meets.

Further, aforementioned bottleneck structure of plastic inner bag fibre winding gas cylinder, wherein: the top wall of the epitaxial connector extends obliquely from the bottom of the outer wall of the upper straight cylinder section of the outer bottleneck, the bottom wall of the epitaxial connector extends obliquely from the middle of the outer wall of the lower straight cylinder section of the outer bottleneck, and the top wall and the bottom wall of the epitaxial connector are gradually closed to each other until the top wall of the epitaxial connector and the outer end of the bottom wall are mutually and hermetically connected.

Further, aforementioned bottleneck structure of plastic inner bag fibre winding gas cylinder, wherein: the top of interior bottleneck is provided with protruding eaves, and protruding eaves axial compresses tightly the laminating on the roof of straight section of thick bamboo on outer bottleneck, and the diapire axial of interior bottleneck compresses tightly the laminating under outer bottleneck on the roof of straight section of thick bamboo.

Further, aforementioned bottleneck structure of plastic inner bag fibre winding gas cylinder, wherein: the inner wall of the lower straight cylinder section of the outer bottleneck is flush with the inner wall of the inner bottleneck.

Further, aforementioned bottleneck structure of plastic inner bag fibre winding gas cylinder, wherein: the embedding grooves are hemispherical grooves, and the hemispherical embedding lugs which are in one-to-one correspondence with the hemispherical embedding grooves and are matched with each other are uniformly arranged on the inner wall of the upper straight cylinder section at intervals in the circumferential direction.

Further, aforementioned bottleneck structure of plastic inner bag fibre winding gas cylinder, wherein: the inner wall of the upper section of the inner bottle mouth is provided with an internal thread.

Further, aforementioned bottleneck structure of plastic inner bag fibre winding gas cylinder, wherein: : the upper straight cylinder section, the extension connector and the lower straight cylinder section of the outer bottle mouth are integrally processed and formed through an injection molding process.

The utility model has the advantages that: one, the annular embedded groove of the inseparable parcel annular embedded piece that sets up in the annular embedded piece that sets up and the epitaxial connector for closely laminating between interior bottleneck and the outer bottleneck and being connected, be difficult for producing axial and radial relative displacement between interior bottleneck and the outer bottleneck, each embedding lug that sets up and the embedding recess of being connected with closely laminating of each embedding lug one-to-one make and can not produce relative rotational displacement after the atress between interior bottleneck and the outer bottleneck, thereby make in the bottleneck and reliably be connected between the outer bottleneck. The utility model has the further advantages that the convex teeth arranged on the combination surface of the outer bottleneck jointed with the plastic liner ensure that the outer bottleneck and the plastic liner are welded and sealed mutually, thus improving the reliability of the connection between the outer bottleneck and the integrally formed plastic liner. Thirdly, adopt the utility model discloses a bottleneck structure's gas cylinder's long service life.

Drawings

Fig. 1 is a schematic structural view of a bottle mouth structure of a gas cylinder with a plastic liner wound with fibers;

FIG. 2 is a schematic structural view of an inner bottle mouth;

FIG. 3 is a schematic structural view of the outer bottle mouth;

fig. 4 is a schematic sectional view along a-a in fig. 2.

Detailed Description

The invention will be described in further detail with reference to the drawings and preferred embodiments.

As shown in fig. 1, 2 and 3, a mouth structure of a fiber-wrapped gas cylinder with a plastic liner comprises: the bottle comprises an inner bottle mouth 1 made of metal, an outer bottle mouth 2 made of plastic wraps the inner bottle mouth 1, the outer bottle mouth 2 is connected to one end of a plastic liner 3 in a sealing mode, a fiber reinforcing layer 4 and a fiber protective layer 5 are arranged on the outer walls of the outer bottle mouth 2 and the plastic liner 3 from inside to outside, and the inner bottle mouth 1 and the outer bottle mouth 2 are tightly connected to the liner 3 through the fiber reinforcing layer 4 and the fiber protective layer 5; a plurality of embedded grooves 11 are circumferentially arranged on the outer wall of the upper section of the inner bottle mouth 1 at intervals, and an annular embedded block 12 protruding outwards is arranged on the outer wall of the bottom of the inner bottle mouth 1; the outer bottleneck includes: go up straight section of thick bamboo section 21 and straight section of thick bamboo section 22 down, circumference interval is provided with a plurality of embedding lug 211 on the inner wall of going up straight section of thick bamboo section 21, embedding lug 211 and embedding recess 11 respectively one-to-one and mutually support, outer bottleneck 2 go up, be provided with epitaxial connector 23 between the straight section of thick bamboo section down, be provided with the annular embedded groove 233 of closely parcel annular embedded piece 12 in the epitaxial connector 23, outer bottleneck 2 and interior bottleneck 1 assembly back, each embedding lug 211 one-to-one imbeds in each embedding recess 11, annular embedded piece 12 imbeds in the annular embedded groove 233, and closely laminate between outer bottleneck 2 and the interior bottleneck 1 of corresponding and connect. Interior bottleneck 1 is gone up the annular embedded groove 233 of the inseparable parcel annular embedded piece 12 that sets up in the annular embedded piece 12 that sets up and the epitaxial connector 23 for closely laminating between interior bottleneck 1 and the outer bottleneck 2 and being connected, be difficult for producing axial and radial relative displacement between interior bottleneck 1 and the outer bottleneck 2, each embedding lug 211 that sets up and with each embedding lug 211 cooperation inseparable laminating connection's embedding recess 11 make in can not produce relative rotational displacement after the atress between bottleneck 1 and the outer bottleneck 2, thereby reliably be connected between bottleneck 1 and the outer bottleneck 2 in making.

In this embodiment, a plurality of convex teeth 25 are provided on the bonding surface of the outer bottleneck 2 bonded to the plastic liner 3, and when the plastic liner 3 is blow molded, the outer bottleneck 2 is welded and sealed with the plastic liner 3 through the convex teeth 25. When the outer bottle mouth 2 is manufactured, the plastic material which is the same as or similar to the plastic inner container 3 is adopted, and the upper straight cylinder section 21, the extension connecting body 23 and the lower straight cylinder section 22 of the outer bottle mouth are integrally processed and formed through an injection molding process. Because the temperature of the plastic inner container 3 is higher when the plastic inner container is integrally formed by blow molding, after the plastic inner container 3 is attached to the joint surface of the outer bottle opening 2, the heat on the plastic inner container 3 is transferred to the convex teeth 25, so that the convex teeth 25 reach a molten state, the outer bottle opening 2 and the inner container 3 are welded and sealed with each other, and the reliability of connection between the outer bottle opening 2 and the plastic inner container 3 is improved. In practical use, the cross section of the convex teeth 25 can be triangular or semicircular or trapezoidal, and the convex teeth 25 can also be arranged circumferentially and are annular convex teeth.

In the embodiment, in order to further enhance the reliability of the axial connection between the inner bottle mouth 1 and the outer bottle mouth 2, the top of the inner bottle mouth 1 is provided with a convex brim 13, the convex brim 13 is axially pressed and attached to the top wall of the straight cylinder section 21 on the outer bottle mouth, and the bottom wall of the inner bottle mouth 1 is axially pressed and attached to the top wall of the straight cylinder section 22 under the outer bottle mouth. The inner thread 15 is arranged on the inner wall of the upper section of the inner bottle mouth 1, so that the plastic liner fiber winding gas cylinder is convenient to connect with the bottle mouth valve. In order to facilitate the mounting of the finish valve which extends down into the outer finish, the inner wall of the outer finish lower straight section 22 is flush with the inner wall of the inner finish 1.

In this embodiment, the upper surface 121 of the annular insert 12 is a downward inclined surface extending outward from the outer wall of the bottom of the inner bottle mouth 1, the lower surface 122 of the annular insert 12 is an arc surface extending outward from the bottom end surface of the inner bottle mouth and protruding downward in a curved manner, and the lower surface 122 of the annular insert 12 gradually approaches the upper surface 121 of the annular insert 12 from inside to outside and upward from the bottom end of the curved protrusion 123 of the annular insert 12. The upper surface 121 and the lower surface 122 are gradually closed from inside to outside from the bottom end of the curved protrusion 123, so that the annular embedded block 12 and the corresponding annular embedded groove 233 are easily assembled, and the curved protrusion 123 makes the assembled annular embedded block 12 not easily separated from the annular embedded groove 233, so that the inner bottle mouth 1 and the outer bottle mouth 2 are not easily displaced in the axial direction and the radial direction.

In the present embodiment, the top wall 231 of the extension connecting body 23 extends outwards and downwards from the bottom of the outer wall of the upper straight cylindrical section 21 of the outer bottleneck 2, the bottom wall 232 of the extension connecting body 23 extends outwards and upwards from the middle of the outer wall of the lower straight cylindrical section 22 of the outer bottleneck 2, and the top wall 231 and the bottom wall 232 of the extension connecting body 23 gradually approach each other until the outer ends of the top wall 231 and the bottom wall 232 of the extension connecting body 23 are hermetically connected with each other; therefore, the plastic inner container 3 can be better butted with the outer wall of the bottom of the lower straight cylinder section 22, and relative displacement is not easy to generate between the plastic inner container 3 and the outer bottleneck 2. In this embodiment, the lower surface of the bottom wall 232 of the extension connector 23 and the outer wall of the lower straight cylinder section 22 below the bottom wall 232 are both provided with a plurality of convex teeth 25, so that the welding between the outer bottle mouth 2 and the plastic inner container 3 is more reliable.

As shown in fig. 2, 3 and 4, four hemispherical embedding grooves 11 are uniformly circumferentially arranged on the outer wall of the upper section of the inner bottle mouth 1 at intervals, and four hemispherical embedding lugs 211 which are in one-to-one correspondence with the respective hemispherical embedding grooves 11 and are mutually matched are uniformly circumferentially arranged on the inner wall of the upper straight cylinder section 21 at intervals. Such hemispherical insertion grooves 11 and insertion projections 211, which are uniformly circumferentially spaced, are easily processed and easily assembled in one-to-one correspondence with each other.

The utility model has the advantages that: one, the annular embedded groove 233 of the inseparable parcel annular embedded piece 12 that sets up in the annular embedded piece 12 that sets up and the epitaxial connector 23 for closely laminating between interior bottleneck 1 and the outer bottleneck 2 is connected, be difficult for producing axial and radial relative displacement between interior bottleneck 1 and the outer bottleneck 2, each embedding lug 211 that sets up and with each embedding lug 211 cooperation inseparable laminating connection's embedding recess 11 make in can not produce relative rotation displacement after the atress between bottleneck 1 and the outer bottleneck 2, thereby reliably be connected between bottleneck 1 and the outer bottleneck 2 in the messenger. Secondly, the utility model has the further advantage that the convex teeth 25 arranged on the combination surface of the outer bottleneck 2 jointed with the plastic inner container 3 ensure that the outer bottleneck 2 and the plastic inner container 3 are welded and sealed with each other, thus improving the reliability of the connection between the outer bottleneck 2 and the integrally formed plastic inner container 3. Thirdly, adopt the utility model discloses a bottleneck structure's gas cylinder's long service life.

Claims (10)

1. A bottleneck structure of a plastic liner fiber-wound gas cylinder comprises: the inner bottleneck of metal material, on the bottleneck including the outer bottleneck parcel of plastics material, outer bottleneck sealing connection is in the one end of plastics inner bag, is provided with fibre reinforcement layer and fibre protective layer, its characterized in that from inside to outside on the outer wall of outer bottleneck and plastics inner bag: a plurality of embedding grooves are circumferentially arranged on the outer wall of the upper section of the inner bottle mouth at intervals, and an annular embedding block protruding outwards is arranged on the outer wall of the bottom of the inner bottle mouth; the outer bottleneck includes: go up straight section of thick bamboo section and straight section of thick bamboo section down, circumference interval is provided with a plurality of embedding lug on the inner wall of going up straight section of thick bamboo section, embedding lug and embedding recess are the one-to-one respectively and mutually support, be provided with epitaxial connector between the upper and lower straight section of thick bamboo section of outer bottleneck, be provided with the annular embedded groove of inseparable parcel annular embedded piece in the epitaxial connector, outer bottleneck and interior bottleneck assembly back, each embedding lug one-to-one imbeds in each embedding recess, in the annular embedded groove of annular embedded piece embedding, and closely laminate between the interior bottleneck of outer bottleneck and correspondence and be connected.

2. The bottle mouth structure of a fiber-wound gas cylinder with a plastic inner container as claimed in claim 1, characterized in that: the combination surface of the outer bottle mouth which is jointed with the plastic inner container is provided with a plurality of convex teeth, and the outer bottle mouth is sealed with the plastic inner container by the mutual welding of the convex teeth.

3. The bottle mouth structure of a fiber-wound gas cylinder with a plastic inner container as claimed in claim 2, characterized in that: the section of the convex teeth is triangular or semicircular or trapezoidal.

4. The opening structure of a fiber-wound gas cylinder with a plastic liner according to claim 1 or 2, characterized in that: the upper surface of annular embedding piece is the decurrent inclined plane of the outside extension of outer wall from interior bottleneck bottom, and the lower surface of annular embedding piece is the bottom surface of following interior bottleneck and outwards extending and the convex arcwall face of downwarping, and the lower surface of annular embedding piece begins to draw close with the upper surface of annular embedding piece from inside to outside upwards gradually from the bottom of the curved protrusion of annular embedding piece and meets.

5. The bottle mouth structure of a fiber-wound gas cylinder with a plastic inner container as claimed in claim 4, wherein: the top wall of the epitaxial connector extends obliquely from the bottom of the outer wall of the upper straight cylinder section of the outer bottleneck, the bottom wall of the epitaxial connector extends obliquely from the middle of the outer wall of the lower straight cylinder section of the outer bottleneck, and the top wall and the bottom wall of the epitaxial connector are gradually closed to each other until the top wall of the epitaxial connector and the outer end of the bottom wall are mutually and hermetically connected.

6. The opening structure of a fiber-wound gas cylinder with a plastic liner according to claim 1 or 2, characterized in that: the top of interior bottleneck is provided with protruding eaves, and protruding eaves axial compresses tightly the laminating on the roof of straight section of thick bamboo on outer bottleneck, and the diapire axial of interior bottleneck compresses tightly the laminating under outer bottleneck on the roof of straight section of thick bamboo.

7. The bottle mouth structure of a fiber-wound gas cylinder with a plastic inner container as claimed in claim 6, wherein: the inner wall of the lower straight cylinder section of the outer bottleneck is flush with the inner wall of the inner bottleneck.

8. The opening structure of a fiber-wound gas cylinder with a plastic liner according to claim 1 or 2, characterized in that: the embedding grooves are hemispherical grooves, and the hemispherical embedding lugs which are in one-to-one correspondence with the hemispherical embedding grooves and are matched with each other are uniformly arranged on the inner wall of the upper straight cylinder section at intervals in the circumferential direction.

9. The opening structure of a fiber-wound gas cylinder with a plastic liner according to claim 1 or 2, characterized in that: the inner wall of the upper section of the inner bottle mouth is provided with an internal thread.

10. The opening structure of a fiber-wound gas cylinder with a plastic liner according to claim 1 or 2, characterized in that: the upper straight cylinder section, the extension connector and the lower straight cylinder section of the outer bottle mouth are integrally processed and formed through an injection molding process.

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