CN109027675B

CN109027675B - High-pressure composite container with sealing structure

Info

Publication number: CN109027675B
Application number: CN201810885168.3A
Authority: CN
Inventors: 姜林; 刘亮; 吕昊; 翁益明; 苏卫东; 王安玉
Original assignee: Yapp Automotive Parts Co Ltd
Current assignee: Yapp Automotive Parts Co Ltd
Priority date: 2018-08-06
Filing date: 2018-08-06
Publication date: 2021-02-02
Anticipated expiration: 2038-08-06
Also published as: CN109027675A

Abstract

The invention discloses a high-pressure composite container with a sealing structure, which comprises a shell, a supporting lining, an end head, a bottleneck valve and a reinforcing layer, wherein the shell is provided with a sealing ring; wherein, be provided with the bottleneck on the casing, support the inside lining joint on the bottleneck outer lane, the bottleneck valve is fixed to be worn to establish in the end, and the enhancement layer parcel is on the casing. According to the sealing structure for the high-pressure composite container, the supporting lining and the bottle mouth can be wrapped in the mounting groove through the matching of the end head, the supporting lining and the bottle mouth, so that the sealing performance of the structure is enhanced, the matching interface between the end head and the shell is prolonged, namely, the leakage path of gas is prolonged, the leakage or permeation of high-pressure gas in the container is effectively prevented, and the sealing effect of the container is ensured.

Description

High-pressure composite container with sealing structure

Technical Field

The invention relates to a composite container, in particular to a high-pressure composite container with a sealing structure.

Background

Most taxis are modified with Compressed Natural Gas (CNG) to replace fuel oil, and the working pressure of a common CNG high-pressure gas cylinder is 20 MPa; some vehicle manufacturers have introduced CNG or CNG and fuel hybrid vehicles, such as audi, general purpose, etc. The automobile adopting the hydrogen medium battery is also the current hotspot, the working pressure of the hydrogen storage high-pressure gas cylinder is generally 35MPa and 70MPa, and an IV-shaped cylinder (a high-pressure plastic inner container composite container) with 70MPa is the current heating point. In addition to vehicles, high-pressure gas cylinders are also fully applied in other fields, for example, a plastic liner composite container (working pressure 2MPa) is adopted for part of liquefied petroleum gas in Europe. 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, and the main reason is that the plastic liner shell and the metal end are made of different materials, so that the connection between the plastic liner and the metal end is loosened in the repeated use process, and the sealing performance is reduced.

In view of the current situation, the connection between the metal end and the plastic inner container is a hot point and a difficult point for research. Fig. 1 is a schematic view of a high-pressure plastic liner composite container in the prior art, which includes a metal end 1, a plastic liner 2 and a reinforcing layer 3, wherein the metal end 1 is installed on the plastic liner 2, and then the plastic liner is formed by winding and wrapping the reinforcing layer 3. Fig. 2 is a view showing a sealing structure in the high pressure plastic liner composite container shown in fig. 1, and as shown in fig. 1 and 2, the large-area contact of the metal end 1 with the plastic liner 2 is technically impossible and expensive even if feasible; the sealing structure does not consider the limit on the axes of the metal end 1 and the plastic inner container 2; the structure does not consider the pressurization that the internal pressure of the plastic inner container 2 changes continuously when winding, which can cause the joint of the metal end 1 and the plastic inner container 2 to generate a gap to cause leakage, as shown by a leakage path 4 shown by an arrow in figure 2; the structure does not consider the limit of a bottle opening when bearing the installation torque, and the bonding strength of the metal end 1 and the reinforcing layer 3 is reduced after the installation; the escape path P of the compressed gas in the structure is short, so that the risk of escape of the compressed gas can be increased, and particularly, the compressed gas is small molecular gas CNG, hydrogen, helium and the like. Therefore, it is necessary to develop a sealing structure capable of solving the above problems.

Disclosure of Invention

The invention aims to provide a high-pressure composite container with a sealing structure, which is used for solving the problems in the prior art, preventing leakage and permeation of high-pressure gas medium in the high-pressure composite container and ensuring the sealing property of the container.

The invention provides a high-pressure composite container with a sealing structure, which comprises:

the bottle opening is arranged on the shell;

the supporting lining is clamped on the outer ring of the bottle mouth;

the end head is provided with a clamping groove and is clamped on the outer ring of the supporting lining through the clamping groove;

the bottleneck valve is fixedly arranged in the end head in a penetrating way;

and the reinforcing layer is wrapped on the shell.

The high-pressure composite container with the sealing structure as described above, wherein the support liner preferably includes a first half-ring liner and a second half-ring liner, and the support liner is formed by fixedly fastening the first half-ring liner and the second half-ring liner.

The high-pressure composite container with the sealing structure as described above, preferably, two end faces of the first half ring liner are respectively provided with a first protrusion and a first groove, two end faces of the second half ring liner are respectively provided with a second protrusion and a second groove, the first protrusion is in clamping fit with the second groove, and the second protrusion is in clamping fit with the first groove.

The high-pressure composite container with the sealing structure is characterized in that the first half-ring liner and the second half-ring liner are provided with a sealing structure, and the sealing structure is arranged between the first half-ring liner and the second half-ring liner;

and a clamping groove is formed in the side wall of the bottle opening, and the limiting protrusion is matched with the clamping groove in a clamping manner.

The high-pressure composite container with a sealing structure as described above, wherein preferably, the head includes a fixing portion in which the fixing hole is provided and a mounting portion in which the mounting groove is provided;

the fixing part comprises a fixing section and a guide section, and a limiting step surface is formed between the mounting groove and the guide section;

a flange is arranged on the bottle mouth and extends in the direction far away from the axis of the bottle mouth, a clamping space is arranged between the flange and the shell, and the support lining is fixedly arranged in the clamping space;

the limiting step surface is abutted with the flanging.

In the high-pressure composite container with the sealing structure, it is preferable that a limit stopper is provided on the limit step surface, the limit stopper extends in a direction away from the fixing portion, and a distance is maintained between the limit stopper and the side wall of the mounting groove.

The high-pressure composite container with the sealing structure preferably further comprises a sealing ring, and an annular groove for clamping the sealing ring is formed in the surface of the limiting step.

The high-pressure composite container with the sealing structure as described above, wherein preferably, an arc-shaped transition section is provided on the mounting portion.

The high-pressure composite container having a sealed structure as described above, wherein the casing preferably has a layered structure including at least two or more layers.

In the high-pressure composite container having a sealed structure as described above, the material of the case is preferably one or a combination of two or more of PA, PE, polyester, PP, POM, and EVOH.

According to the sealing structure for the high-pressure composite container, the supporting lining and the bottle mouth can be wrapped in the mounting groove through the matching of the end head, the supporting lining and the bottle mouth, so that the sealing performance of the structure is enhanced, the matching interface between the end head and the shell is prolonged, namely, the leakage path of gas is prolonged, the leakage or permeation of high-pressure gas in the container is effectively prevented, and the sealing effect of the container 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 high pressure plastic liner composite container in the prior art;

FIG. 2 is a sealing structure of the high pressure plastic liner composite container shown in FIG. 1;

FIG. 3 is a schematic structural diagram of a high pressure composite container with a sealing structure provided by an embodiment of the present invention;

FIG. 4 is a cross-sectional view of a high pressure composite container having a sealing structure provided by an embodiment of the present invention;

FIG. 5 is a cross-sectional view of the housing;

FIG. 6 is an enlarged view of a portion of FIG. 4;

FIG. 7 is a cross-sectional view of FIG. 6 with the finish valve removed;

FIG. 8 is an exploded view of the support liner assembled to the high pressure composite vessel;

fig. 9 is a cross-sectional view of the tip.

Description of reference numerals:

1-metal end 2-plastic inner container 3-reinforced layer

4-leakage path

100-end head 110-fixing part 111-fixing section

112-guide section 120-mounting section 121-arc transition section

122-mounting groove 123-limiting step surface 130-fixing hole

140-limit retainer ring 200-support liner 210-first half ring liner

211-first projection 212-first groove 213-limit projection

220-second half-ring liner 300-shell 310-neck finish

311-flanging 400-bottleneck valve 500-reinforcing layer

a-sealing ring and b-sealing ring

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. 3 to 7, an embodiment of the present invention provides a high pressure composite container, which includes a shell 300, a support liner 200, a head 100, a finish valve 400, and a reinforcing layer 500; the shell 300 is provided with a bottle opening 310, the support lining 200 is clamped on an outer ring of the bottle opening 310, the end head 100 is provided with a mounting groove 122, and the end head 100 is clamped on an outer ring of the support lining 200 through the mounting groove 122; the bottleneck valve 400 is fixedly inserted into the end head 100, and the reinforcing layer 500 is wrapped on the shell 300, wherein the reinforcing layer 500 may be made of a fiber composite material.

The bottle mouth 310 is provided with a space for arranging the support lining 200, and meanwhile, the support lining 200 and the bottle mouth 310 can be wrapped in the mounting groove 122 through the matching of the end head 100, the support lining 200 and the bottle mouth 310, so that the sealing performance of the structure is enhanced, the matching interface between the end head 100 and the shell 300 is prolonged, the leakage path of gas is also prolonged, the leakage or permeation of high-pressure gas in the container is effectively prevented, and the sealing effect of the container is ensured.

The housing 300 is made of plastic and is obtained by a blow molding or rotational molding process. According to the permeation characteristics of different molecular weights for bearing high-pressure gas, the shell 300 with a layered structure may be adopted to prevent permeation of small molecule gas such as hydrogen molecules and ensure sealing performance when storing different gases, in this embodiment, the shell 300 may be a layered structure including at least two layers. The material of the case 300 may be one or a combination of two or more of PA, PE, polyester, PP, POM, and EVOH. That is, the layered structure of each layer may be a single material or a combination of two or more materials.

It should be noted that, an outer ring of the support liner 200 may be provided with an external thread screwed to the mounting groove 122, and after the support liner 200 is assembled to the bottle mouth 310, the end head 100 may be fixedly connected to the support liner 200 through the external thread of the support liner 200, so as to achieve the assembly and fixation of the end head 100, and ensure the reliability of the fixation of the end head 100.

In order to ensure that the support liner 200 has a certain support strength, the support liner 200 may be made of a metal material, such as aluminum alloy, stainless steel, or the like; or a plastic material with certain strength, specifically, the material of the support lining 200 may be one of POM, PA, PE, and PP.

It can be understood that the gas in the container has a large pressure, and the mouth 310 may be slightly deformed by the pressure for a long time, and such deformation may be transmitted to the support lining 200, resulting in an uneven mating interface between the support lining 200 and the mouth 310, and thus gas leakage is likely to occur; if the support liner 200 is integrally formed on the mouth 310, it is difficult to cut and disassemble the support liner 200 if the mouth 310 or the support liner 200 is deformed, and the mouth 310 cannot be repaired, even the whole high-pressure composite container is scrapped. In order to solve this problem, in this embodiment, as shown in fig. 8, the support liner 200 may include a first half-ring liner 210 and a second half-ring liner 220, and the support liner 200 is formed by fixedly fastening the first half-ring liner 210 and the second half-ring liner 220, thereby implementing the replacement of the support liner 200.

The first half-ring liner 210 and the second half-ring liner 220 can be fastened and fixed through gluing on the matching interface, but the glue is easily smeared on parts except the matching interface by mistake during gluing to stain a container, and in addition, the glued first half-ring liner 210 and the second half-ring liner 220 are not easily separated, so that the disassembly is inconvenient. Therefore, in this embodiment, two end surfaces of the first half-ring liner 210 may be respectively provided with a first protrusion and a first groove, two end surfaces of the second half-ring liner 220 may be respectively provided with a second protrusion and a second groove, the first protrusion is in clamping fit with the second groove, and the second protrusion is in clamping fit with the first groove; therefore, the first half ring inner liner 210 and the second half ring inner liner 220 can be conveniently disassembled and assembled through the clamping matching of the corresponding protrusions and the corresponding grooves, and meanwhile, the matching compactness of the first half ring inner liner 210 and the second half ring inner liner 220 can also be ensured.

In order to prevent the first half-ring liner 210 and the second half-ring liner 220 from rotating in the circumferential direction of the mouth 310, the inner rings of the first half-ring liner 210 and the second half-ring liner 220 may be provided with a limiting protrusion, and the mouth 310 may be provided with a slot matched with the limiting protrusion, when the first half-ring liner 210 and the second half-ring liner 220 are installed, the limiting protrusion may be clamped into the slot on the mouth 310, so that the first half-ring liner 210 and the second half-ring liner 220 may be installed and positioned to prevent rotation.

Specifically, as shown in fig. 9, the tip 100 includes a fixing portion 110 and a mounting portion 120, the fixing portion 110 is provided therein with a fixing hole 130 for fixing the mouthpiece valve 400, and the mounting groove 122 is provided in the mounting portion 120; the fixing portion 110 includes a fixing section 111 and a guiding section 112, an inner diameter of the guiding section 112 is smaller than an inner diameter of the fixing section 111 and an inner diameter of the mounting groove 122, the fixing section 111, the guiding section 112 and the mounting groove 122 are sequentially communicated, and a limiting step surface 123 is formed between the mounting groove 122 and the guiding section 112. Wherein, be provided with turn-ups 311 on the bottleneck 310, turn-ups 311 extends to the direction of keeping away from bottleneck 310 axis, is provided with the joint space between turn-ups 311 and the casing 300, supports that inside lining 200 is fixed to be set up in the joint space, and spacing step face 123 and turn-ups 311 butt. As shown in fig. 6, when the tip 100 is assembled, the limit step surface 123 can abut against the flange 311 of the mouth 310, thereby realizing the installation limit of the tip 100 in the axial direction, and simultaneously, the support liner 200 and the flange 311 can be wrapped in the installation groove 122, so that the leakage path of high-pressure gas in the container becomes zigzag, and the leakage path is also prolonged, thereby effectively preventing the gas leakage and permeation. In addition, as shown in fig. 6, an internal thread may be provided on the fixing section 111, and the mouthpiece valve 400 may be fixedly connected with the fixing section 111 through the internal thread; in order to ensure the sealing performance after the bottle neck valve 400 is engaged with the head 100, as shown in fig. 6, a sealing ring a is disposed on the end surface of the fixing segment 111.

In order to avoid this problem, in the present embodiment, as shown in fig. 9, a limiting step surface 123 may be provided with a limiting stop ring 140, the limiting stop ring 140 extends in a direction away from the fixing portion 110, and a distance is kept between the limiting stop ring 140 and a side wall of the mounting groove 122; after the tip 100 is installed, the stop collar 140 can be clamped inside the inner hole of the mouth 310, so that the mouth 310 can be restrained from shrinking and deforming.

Further, in order to ensure the sealing performance of the fitting interface between the limit step surface 123 and the support liner 200, an annular groove may be provided on the limit step surface 123, so that the sealing ring b is clamped in the annular groove. The two sealing rings b can be arranged, and after the bottleneck valve 400 and the end head 100 are in threaded connection and tightened, the two sealing rings b can be effectively compressed to form an effective sealing interface so as to prevent gas medium from leaking and permeating, and excellent sealing performance between the metal end head 100 and the bottleneck valve 400 is formed. Wherein, the diameter of the sealing ring b can be 2 mm-4 mm, and the compression amount can be 20% -30%.

Further, as shown in fig. 6, 7, and 9, the installation part 120 is provided with the arc transition section 121, the lower surface of the arc transition section 121 can be tightly attached to the casing 300, and the upper end surface of the arc transition section 121 is arc-shaped, so that the arc transition can be in butt joint with the arc surface on the casing 300 to form complete arc transition, so that the reinforcing layer 500 can be tightly attached to the casing 300 and the installation part 120 at the same time, thereby ensuring the compactness of the structure, and simultaneously, the end 100 and the support lining 200 can bear higher internal pressure of the container, thereby avoiding damages such as deformation and flying out.

According to the sealing structure for the high-pressure composite container, provided by the embodiment of the invention, the supporting lining and the bottle mouth can be wrapped in the mounting groove through the matching of the end head, the supporting lining and the bottle mouth, so that the sealing property of the structure is enhanced, the matching interface between the end head and the shell is prolonged, namely the leakage path of gas is prolonged, the leakage or permeation of high-pressure gas in the container is effectively prevented, and the sealing effect of the container 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.

Claims

1. A high pressure composite container with a sealed structure, comprising:

the bottle opening is arranged on the shell;

the supporting lining is clamped on the outer ring of the bottle mouth;

the end head is provided with a mounting groove, and the end head is clamped on the outer ring of the supporting lining through the mounting groove;

the bottleneck valve is fixedly arranged in the end head in a penetrating way;

the reinforcing layer is wrapped on the shell;

the supporting lining comprises a first semi-ring lining and a second semi-ring lining, and the supporting lining is formed by fixedly buckling the first semi-ring lining and the second semi-ring lining;

limiting bulges are arranged on the inner rings of the first semi-ring inner liner and the second semi-ring inner liner;

2. The high-pressure composite container with the sealing structure according to claim 1, wherein a first protrusion and a first groove are respectively disposed on two end surfaces of the first half ring liner, a second protrusion and a second groove are respectively disposed on two end surfaces of the second half ring liner, the first protrusion is in snap fit with the second groove, and the second protrusion is in snap fit with the first groove.

3. The high-pressure composite container with a sealing structure according to claim 1, wherein the head includes a fixing portion in which a fixing hole for fixing the mouth valve is provided and a mounting portion in which the mounting groove is provided;

the limiting step surface is abutted with the flanging.

4. The high-pressure composite container with the sealing structure according to claim 3, wherein a limiting retainer ring is provided on the limiting step surface, the limiting retainer ring extends in a direction away from the fixing portion, and a distance is kept between the limiting retainer ring and the side wall of the mounting groove.

5. The high-pressure composite container with the sealing structure according to claim 3, further comprising a sealing ring, wherein an annular groove for clamping the sealing ring is provided on the limiting step surface.

6. The high pressure composite container with a sealing structure according to claim 3, wherein an arc-shaped transition section is provided on the mounting portion.

7. The high pressure composite container with a sealing structure according to claim 1, wherein the casing is a layered structure including at least two layers.

8. The high-pressure composite container with a sealing structure according to claim 7, wherein the material of the case is a combination of one or more of PA, PE, polyester, PP, POM, and EVOH.