CN219367410U - Double-channel radial sealing high-pressure composite container - Google Patents

Abstract

The utility model relates to a double-channel radial sealed high-pressure composite container, which comprises an inner container assembly, a fiber composite reinforcing layer and a bottleneck valve, wherein the fiber composite reinforcing layer is wound on the outer side of the inner container assembly and then assembled with the bottleneck valve to form the high-pressure composite container; the liner assembly comprises an injection molding assembly, a metal end head and a sealing ring assembly, wherein the injection molding assembly and the metal end head form circumferential positioning after being assembled, and the metal end head and the sealing ring assembly form two radial seals after being assembled; the technical scheme design benefit, the upside, metal end and the structure of moulding plastics the assembly design for mutual matching form circumferential location, form two radial seals after the downside, metal end and sealing washer subassembly assembly, further improved the sealing performance of compound container.

Description

Double-channel radial sealing high-pressure composite container

Technical Field

The utility model relates to a composite container, in particular to a double-channel radial sealing high-pressure composite container, and belongs to the technical field of high-pressure composite containers.

Background

Most taxis are refitted with Compressed Natural Gas (CNG) to replace fuel oil, and the working pressure of a common CNG high-pressure gas cylinder is 20MPa; some vehicle manufacturers have promoted CNG or vehicles in which CNG is mixed with fuel, such as audi, general, etc. The automobile adopting the hydrogen medium battery is also a current hot spot, the working pressure of the hydrogen storage high-pressure gas bottle is generally 35MPa and 70MPa, and an IV type bottle (high-pressure plastic liner composite container) with 70MPa is a current research and development hot spot. In addition to vehicles, high-pressure gas cylinders are also used in other fields, for example, some liquefied petroleum gases in europe use plastic liner composite containers (working pressure 2 MPa). 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 large weight and is not easy to transport; and the higher the storage pressure is, the more complex the production process of the metal plastic liner is, the higher the cost is, and the risk of being corroded by high-pressure gas exists. In order to meet the light weight requirement, the high pressure plastic liner composite container is produced, and the product has the advantages of corrosion resistance, fatigue resistance, light weight and the like because of the characteristics of plastics, and the main manufacturers are Toyota, hexagon, quantum and the like. Compared with a pure metal or metal lining composite container, the high-pressure plastic liner composite container has the advantages that the tightness is ensured more severely, the main reason is that the plastic liner shell and the metal end are made of different materials (because the plastic liner needs to be in sealing connection with the bottleneck valve, the end of the plastic liner needs to be made of metal materials), and in the repeated use process of the gas cylinder, the connection between the plastic liner and the metal end can be loosened, and the sealing performance is reduced. Therefore, how to form excellent durable sealing and gas permeation resistance for the plastic shell and the metal end is a core technology for breaking through the high-pressure composite container of the plastic liner.

In view of the current situation, the connection of the metal end and the plastic liner becomes a hot spot and a difficult point of research. Fig. 1 shows a high-pressure plastic liner composite container, wherein a metal end 1 is arranged on a plastic liner 2, and then is formed by winding and wrapping a fiber composite material layer 3. Fig. 2 illustrates a sealing structure of an end face: the large-surface contact of the metal end 1 with the plastic liner is not feasible in technology, and even if the process is feasible, the cost is high; the limit on the axes of the metal end 1 and the plastic liner 2 is not considered in the structure; the structure does not consider the pressurization of the continuous change of the internal pressure of the plastic liner during winding, which can lead to the generation of gaps at the joint of the metal end 1 and the plastic liner to cause leakage; the structure does not consider the limitation of the bottleneck when bearing the installation torque, and the bonding strength of the metal end 1 and the composite layer 3 is reduced after the installation; in this structure, the escape route P of the compressed gas is shorter, which increases the risk of escaping the compressed gas, especially the small molecular gas CNG, hydrogen, helium, etc., so a new solution is urgently needed to solve the above technical problems.

Disclosure of Invention

The utility model aims at the problems existing in the prior art, and provides a double-channel radial sealing high-pressure composite container which is used for containing high-pressure gas polymer materials.

In order to achieve the above purpose, the technical scheme of the utility model is that the double-channel radial sealing high-pressure composite container comprises a liner component, a fiber composite reinforcing layer and a bottleneck valve, wherein the fiber composite reinforcing layer is wound on the outer side of the liner component and then assembled with the bottleneck valve to form the high-pressure composite container;

the liner assembly comprises an injection molding assembly, a metal end and a sealing ring assembly, wherein the injection molding assembly and the metal end form circumferential positioning after being assembled, and the metal end and the sealing ring assembly form two radial seals after being assembled.

As an improvement of the utility model, the injection molding assembly takes the metal lining as an injection molding insert, and the injection molding rubber coating piece is formed by injection molding of the plastic body and the metal lining, wherein the metal lining is annular, the section of the metal lining is U-shaped, and the injection molding assembly presents a U-shaped sealing groove.

As an improvement of the utility model, the mouth part of the injection molding assembly is of a polygonal design, and the circumferential positioning between the mouth part and the polygonal positioning structure of the metal end is formed after the mouth part is assembled.

As an improvement of the utility model, the sealing ring assembly comprises a first sealing ring and a second sealing ring, the metal end is provided with a sealing head, the sealing head is provided with an inner sealing groove and an outer sealing groove, and the inner sealing groove and the outer sealing groove of the injection molding assembly cross section form two radial seals on a U-shaped sealing channel through the first sealing ring and the second sealing ring.

As an improvement of the utility model, the metal lining is provided with a plurality of holes, so that plastics mutually penetrate between two sides of the metal lining during injection molding, and the plastic body and the metal lining are further ensured to be tightly wrapped together.

As an improvement of the utility model, the plastic body selectively adopts the thermoplastic plastics which are industrially applied at present according to the molecular weight permeation characteristics of different bearing high-pressure gases, and comprises one or more than one of PA, PE, PPA, PPS, polyester and PP, POM, EVOH. Meanwhile, the plastic shell can also adopt a multi-layer structure (gas-containing barrier layer) made of the material, so that permeation of small molecules of carrier gas such as hydrogen molecules from the material is prevented.

As an improvement of the utility model, the metal end is preferably made of metal according to the corrosiveness and high pressure resistance of different bearing gas media, and one or more of aluminum alloy, stainless steel and other metal materials are adopted; the metal lining is made of stainless steel.

As an improvement of the utility model, the sealing ring component is made of one or more of FKM, EPDM, FVMQ, PTFE and silicone resin, and has the characteristics of hydrogen corrosion resistance and low temperature resistance.

Compared with the prior art, the utility model has the advantages that 1) the whole structure of the technical scheme is simple, the sealing performance is excellent, 2) the technical scheme is ingenious in design, the metal end head and the injection molding assembly are designed to be mutually matched structures on the upper side, circumferential positioning is formed, and two radial seals are formed on the same leakage channel through the sealing ring assembly after the plastic bodies of the metal end head and the injection molding assembly are assembled on the lower side, so that the sealing performance of the composite container is further improved; 3) According to the technical scheme, two radial seals are formed on the U-shaped sealing channel, medium pressure in the container acts on the outer side of the U-shaped sealing groove of the plastic assembly, pressure transmission is carried out through the elastic U-shaped sealing groove, and the greater the medium pressure is, the greater the pressure of the injection molding assembly on the first sealing ring and the second sealing ring is, the more sealing is facilitated, so that a sealing self-tightening function is formed.

Drawings

FIG. 1 is a schematic view of the overall structure of a high-pressure composite container according to the present utility model;

FIG. 2 is a schematic view of a metal tip structure;

3-1-3 are schematic structural views of an injection molding assembly;

FIGS. 4-1 and 4-2 are schematic diagrams illustrating the assembly of a metal tip and an injection molding assembly;

FIG. 5 is a schematic view of a seal channel structure;

FIG. 6 is a schematic diagram of a seal self-tightening condition;

fig. 7 is a schematic view of the overall structure of the assembled utility model.

In the figure: 1. the sealing device comprises a metal end head, 11, a positioning structure, 12, a sealing head, 2, an injection molding assembly, 21, a metal lining, 211, a small hole, 22, a U-shaped sealing groove, 23, a plastic body, 3, a fiber composite reinforcing layer, 4, a bottleneck valve, 5, a sealing ring assembly, 51, a first sealing ring, 52 and a second sealing ring.

Detailed Description

In order to enhance the understanding of the present utility model, the present embodiment will be described in detail with reference to the accompanying drawings.

Example 1: referring to fig. 1-7, a dual-channel radial sealed high-pressure composite container comprises a liner assembly, a fiber composite reinforcing layer 3 and a bottleneck valve 4, wherein the fiber composite reinforcing layer 3 is wound on the outer side of the liner assembly and then assembled with the bottleneck valve 4 to form the high-pressure composite container, and a sealing ring structure is arranged in the bottleneck valve to further ensure the sealing effect of a bottleneck; the liner assembly comprises an injection molding assembly, a metal end 1 and a sealing ring assembly, wherein the injection molding assembly and the metal end form circumferential positioning after being assembled, and the metal end 1 and the sealing ring assembly form two radial seals after being assembled.

Referring to fig. 3-1-3, in this solution, the injection molding assembly 2 uses a metal liner 21 as an injection molding insert, and forms an injection molding rubber-coated piece by injection molding of a plastic body 23 and the metal liner 21, wherein the metal liner is set to be U-shaped, the injection molding assembly presents a U-shaped seal groove, the mouth of the injection molding assembly 2 is in a polygonal design, and forms circumferential positioning after being assembled with a polygonal positioning structure 11 of the metal end 1.

Referring to fig. 4-1 and 4-2, the seal ring assembly 5 includes a first seal ring 51 and a second seal ring 52, the metal end is provided with a seal head 12, wherein the seal head 12 is provided with an inner seal groove and an outer seal groove, and referring to fig. 5 and 6, the inner seal groove and the outer seal groove of the injection molding assembly form two radial seals on the U-shaped seal channel through the seal ring 51 and the second seal ring 52. The U-shaped sealing channel is a potential leakage channel of the medium in the container in the arrow direction, and the channel is U-shaped and has two radial seals, so that the leakage amount is greatly reduced. Referring to fig. 6, the pressure of the medium in the container acts on the outer side of the "U-shaped sealing groove" of the "plastic assembly", the greater the pressure of the medium is, the greater the pressure on the inner side "sealing ring" is, due to the elasticity of the "U-shaped sealing groove" and the transmission of pressure, the more favorable the sealing is, so that a self-tightening seal is formed, the fiber composite layer is wound on the outer side of the inner container, the bottle valve is assembled, and finally the sealing between the bottle valve and the metal end and the injection molding assembly is formed, as shown in fig. 7.

In the above-mentioned scheme, a plurality of small holes 211 are formed in the metal lining 21, so that the plastic penetrates through each other between two sides of the metal lining during injection molding, and the plastic body and the metal lining are further ensured to be tightly wrapped together.

In the utility model, the plastic body selectively adopts thermoplastic plastics which are used in industry at present according to the molecular weight permeation characteristics of different bearing high-pressure gases, and comprises one or more than one of PA, PE, PPA, PPS, polyester and PP, POM, EVOH. Meanwhile, the plastic shell can also adopt a multi-layer structure (gas-containing barrier layer) made of the material, so that permeation of small molecules of carrier gas such as hydrogen molecules from the material is prevented.

In the utility model, according to the corrosiveness and high pressure resistance of different bearing gas media, the metal end is preferably made of metal, and one or more of aluminum alloy, stainless steel and other metal materials are adopted; the metal lining is made of stainless steel.

In the utility model, the sealing ring component is made of one or more of FKM, EPDM, FVMQ, PTFE and silicone resin, and has the characteristics of hydrogen corrosion resistance and low temperature resistance.

It should be noted that the above-mentioned embodiments are not intended to limit the scope of the present utility model, and equivalent changes or substitutions made on the basis of the above-mentioned technical solutions fall within the scope of the present utility model as defined in the claims.

Claims (7)

1. The double-channel radial sealing high-pressure composite container is characterized by comprising an inner container assembly, a fiber composite reinforcing layer and a bottleneck valve, wherein the fiber composite reinforcing layer is wound on the outer side of the inner container assembly and then assembled with the bottleneck valve to form the high-pressure composite container;

the liner assembly comprises an injection molding assembly, a metal end and a sealing ring assembly, wherein the injection molding assembly and the metal end form circumferential positioning after being assembled, and the metal end and the sealing ring assembly form two radial seals after being assembled.

2. The dual radially sealed high pressure composite container of claim 1, wherein the injection molding assembly takes a metal liner as an injection molding insert, and an injection molding rubber coating is formed by injection molding of a plastic body and the metal liner, wherein the metal liner is annular, the cross section of the metal liner is U-shaped, and the injection molding assembly presents a U-shaped sealing groove.

3. The dual radially sealed high pressure composite container of claim 1, wherein the mouth of the injection molding assembly is of polygonal design and is assembled with a polygonal locating structure of the metal end to provide circumferential location therebetween.

4. The dual-channel radially sealed high pressure composite container of claim 2, wherein the seal ring assembly comprises a first seal ring and a second seal ring, the metal end is provided with a seal head, wherein the seal head is provided with an inner seal groove and an outer seal groove, and the inner seal groove and the outer seal groove of the injection molding assembly cross section form two radial seals on the U-shaped seal channel through the first seal ring and the second seal ring.

5. The dual radially sealed high pressure composite vessel of claim 2, wherein the metal liner has a plurality of holes therein such that the plastic material interpenetrates between the sides of the metal liner during injection molding.

6. The dual radially sealed high pressure composite container of claim 2, 3 or 4, wherein the metal tip is made of metal and is made of one or more of aluminum alloy and stainless steel metal materials; the metal lining is made of stainless steel.

7. The double-channel radial sealing high-pressure composite container according to claim 2, 3 or 4, wherein the sealing ring component is made of one or more of FKM, EPDM, FVMQ, PTFE and silicone, and has the characteristics of hydrogen corrosion resistance and low temperature resistance.