KR20140128038A - High pressure vessel and method for manufacturing the same - Google Patents

Abstract

The present invention relates to a high pressure vessel which can store high pressure gas just like a fuel tank of a vehicle or a hydrogen tank of a fuel cell vehicle, and to a manufacturing method thereof. The high pressure vessel of the present invention includes: a synthetic resin liner having a main liner which has a storage space on the inside and a first sub liner in a semi-spherical type which is combined on one end of the main liner and has a first combination boss unit where a combination hole is formed on the center; a metallic nozzle boss forming a reinforcement layer which covers an outer surface of the synthetic resin liner and a flow path which is inserted and bound on the combination hole of the first combination boss unit and is for floating of fluids on the center; and a first inner compressed ring fitted and combined on an outer surface of a first inner protruding unit protruding toward the inside of the first sub liner of the first combination boss unit and compressing the first inner protruding unit to an outer surface of the inserted nozzle boss.

Description

Technical Field [0001] The present invention relates to a high-pressure vessel,

The present invention relates to a high-pressure vessel, and more particularly, to a high-pressure vessel capable of safely storing a high-pressure gas such as a fuel tank of a natural gas vehicle or a hydrogen tank of a fuel cell vehicle, and a method of manufacturing the same.

Generally, in a high-pressure vessel such as a fuel tank of a natural gas vehicle or a hydrogen tank of a fuel cell vehicle, a liner is made of a synthetic resin for lightening, and a carbon fiber or glass fiber is dipped in a polymer resin such as an epoxy resin It is made by winding. The synthetic resin used as the liner of the high-pressure vessel includes high-density polyethylene, polypropylene, and polyester resin.

These synthetic resin liners are lighter in weight than metal liners, have high corrosion resistance, and are very resistant to repetitive filling fatigue. It also has the advantage of shortening the charging time compared to the metallic liner.

Despite these advantages, there is a problem that does not occur when using a metallic liner when using a synthetic resin liner. That is, when manufacturing a high-pressure vessel, a metallic nozzle boss for connecting a regulator or a valve is connected to the end of the liner. When a synthetic resin liner is used, the connection part between the metallic nozzle boss and the synthetic resin liner is not firm. A problem may occur. Particularly, when a liner is manufactured by injection molding or rotary molding, a metallic nozzle is inserted and formed, which makes it difficult to use an adhesive.

A variety of structures have been proposed for the high-pressure vessel which can prevent leakage of high-pressure gas by improving the connection structure between the synthetic resin liner and the metallic nozzle boss, and Korean Patent Registration No. 1161229 (registered on June 25, 2012) And an example thereof is disclosed in Japanese Laid-Open Patent Publication No. 2012-0036132 (published on Apr. 17, 2012).

At present, various researches are being conducted to improve the bonding structure between the synthetic resin liner and the metallic nozzle boss in addition to the above-described high-pressure vessel, thereby reducing the risk of leakage of high-pressure gas and increasing productivity.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a high-pressure vessel in which the bonding structure between a synthetic resin liner and a metallic nozzle boss is improved to reduce the risk of leakage of high-pressure gas and improve productivity, .

According to an aspect of the present invention, there is provided a high-pressure vessel including a main liner having a storage space therein, a hemispherical first sub-liner having a first engaging boss formed at a center thereof and coupled to one end of the main liner, A reinforcing layer surrounding the outer surface of the synthetic resin liner, a metallic nozzle boss inserted into the fitting hole of the first fitting boss portion and having a flow path for fluid flow in the center, And a first inner compression ring which is fitted to the outer surface of the first inner protrusion protruded to the inner side of the first sub-liner and presses the first inner protrusion on the outer surface of the nozzle boss inserted into the first inner protrusion.

The outer surface of the nozzle boss may have a protruding portion protruding outward to increase a coupling force with the first engaging boss portion.

The protrusion of the nozzle boss may be provided with an insertion groove, and a sealing member may be inserted into the insertion groove such that the sealing member is interposed between the nozzle boss and the first engagement boss.

The nozzle boss is coupled to the first engaging boss portion through an insert injection, the wing portion protrudes from an outer surface of the nozzle boss, and a through hole is formed in the wing portion such that synthetic resin constituting the first engaging boss portion flows into the nozzle boss. .

The high-pressure vessel according to the present invention includes a first sub-liner and a second sub-liner. The high-pressure vessel includes a first sub-liner and a second sub- 1 < / RTI > outer compression.

The high-pressure vessel according to the present invention is provided with a second engaging boss portion having a coupling hole at the center thereof. The high-pressure vessel is coupled to the other end of the main liner to form, together with the main liner and the first sub- A metallic fixing boss inserted into the coupling hole of the second coupling boss portion and having a fixing groove formed at the center thereof, and a second fixing protrusion formed on the outer surface of the second inner protrusion portion protruding inward of the second coupling boss portion of the second sub- And a second inner compression ring for pressing the second inner protrusion on an outer surface of the fixed boss inserted into the second inner compression ring.

Wherein a protruding portion for increasing a coupling force with the second engaging boss portion is protruded outward from the outer surface of the fixed boss, and a sealing member is formed in the insertion groove formed in the protruding portion of the fixed boss, between the fixed boss and the second engaging boss portion As shown in Fig.

The high-pressure vessel according to the present invention includes a second sub-liner and a second sub-liner. The high-pressure vessel includes a second sub-liner and a second sub- 2 outer compression.

According to another aspect of the present invention, there is provided a method of manufacturing a high-pressure vessel, comprising the steps of: (a) preparing a metallic nozzle boss having a flow path for fluid flow in the center thereof; Forming a hemispherical first sub-liner with a first coupling boss formed thereon by insert injection with the nozzle boss such that the nozzle boss is inserted into the coupling hole; and (c) 1) fitting a first inner compression ring onto an outer surface of a first inner protrusion protruding inward of the sub-liner so as to press the first inner protrusion on an outer surface of the nozzle boss inserted therein, and (d) Forming a synthetic resin liner by joining the first sub-liner to one end of a main liner having a storage space therein; (e) To form a reinforcing layer.

In the step (a), the outer surface of the nozzle boss may be provided with a protrusion for increasing the coupling force with the first engaging boss.

In the step (b), the nozzle boss and the first sub-liner may be insert-injected while a sealing member is coupled to the outer surface of the protrusion.

The first outer compression ring may be inserted into the outer surface of the first outer protrusion protruded to the outside of the first sub-liner of the first coupling boss unit in the step (c) so that the first outer protrusion is inserted into the outer surface of the nozzle boss .

The method of any one of the preceding claims, further comprising the steps of: (i) preparing a metallic fixing boss; and (ii) attaching a hemispherical second sub-liner with a second coupling boss portion (Iii) forming a second inner compression ring on an outer surface of a second inner protrusion protruding inward of the second sub-liner of the second coupling boss, And pressing the second inner protrusion to the outer surface of the fixed boss inserted therein, wherein in the step (d), the second sub liner to which the fixing boss is coupled is attached to the other end of the main liner To form the synthetic resin liner.

In the high-pressure vessel according to the present invention, after the first sub-liner of the synthetic resin material and the metallic nozzle boss which constitute the synthetic resin liner are insert-injected, the first sub-liner and the first sub- And the strength of the first sub-liner is improved. The second sub liner of the synthetic resin liner and the metallic fixing boss are insert-injected, and then the second inner liner and the second external compression ring are combined with each other to thereby form a coupling force between the second sub liner and the fixing boss And the strength of the second sub-liner is improved. Therefore, the risk of leakage of the high-pressure gas is small and the durability is excellent.

1 is a cross-sectional view of a high-pressure vessel according to an embodiment of the present invention.
FIG. 2 is a drawing showing a nozzle boss of a high-pressure vessel according to an embodiment of the present invention and components surrounding the nozzle boss.
FIG. 3 illustrates a process of manufacturing a high-pressure vessel according to an embodiment of the present invention.
FIG. 4 is an excerpt of a fixing boss of a high-pressure vessel according to an embodiment of the present invention and surrounding components thereof.

Hereinafter, a high-pressure vessel and a method of manufacturing the same according to the present invention will be described in detail with reference to the accompanying drawings.

In describing the present invention, the sizes and shapes of the components shown in the drawings may be exaggerated or simplified for clarity and convenience of explanation. In addition, the terms defined in consideration of the configuration and operation of the present invention may be changed according to the intention or custom of the user, the operator. These terms are to be construed in accordance with the meaning and concept consistent with the technical idea of the present invention based on the contents throughout the present specification.

FIG. 1 is a cross-sectional view of a high-pressure vessel according to an embodiment of the present invention. FIG. 2 is a perspective view of a nozzle boss of a high- FIG. 4 is a view illustrating a fixing boss of a high-pressure vessel according to an embodiment of the present invention and components surrounding the high-pressure vessel. FIG.

1 to 3, the high-pressure vessel 10 according to an embodiment of the present invention is for storing high-pressure gas such as a fuel tank of a natural gas vehicle or a hydrogen tank of a fuel cell vehicle, A reinforcing layer 35 surrounding the outer surface of the synthetic resin liner 20, a nozzle boss 40 provided at one end of the synthetic resin liner 20, a synthetic resin liner 20, And a fixing boss 60 provided at the other end. Here, the synthetic resin liner 20 may be made of high-density polyethylene, polypropylene, polyester resin or the like, and the reinforcing layer 35 may be formed by laminating carbon fiber or glass fiber into a polymer resin such as epoxy resin, It can be formed by winding it on the outer surface.

The synthetic resin liner 20 includes a cylindrical main liner 21 having a storage space therein, a first sub liner 22 coupled to one end of the main liner 21 and covering one end of the main liner 21, And a second sub liner 28 coupled to the other end of the liner 21 and covering the other end of the main liner 21. [ The main liner 21, the first sub-liner 22, and the second sub-liner 28 are each made of a synthetic resin as described above, and then joined by fusion bonding or the like.

1 and 2, the first sub-liner 22 is provided at the center thereof with a first engaging boss portion 23 having a engaging hole 24 formed therein, and the first engaging boss portion 23 A metallic nozzle boss 40 for fitting a device such as a regulator or a valve is inserted into the hole 24. The nozzle boss 40 includes a nozzle body 41 having a flow path 42 for fluid flow in the center thereof, a plurality of protrusions 43 protruding from the outer surface of the nozzle body 41, And a wing portion 44 protruding outward in the middle of the wing portion 44. A screw portion for screw connection of a regulator, a valve, or the like may be provided in the flow path 42 of the nozzle body 41.

The nozzle boss 40 is integrated with the first sub-liner 22 of the synthetic resin material through insert injection. The plurality of protrusions 43 and the wings 44 projecting outwardly of the nozzle body 41 are formed in such a manner that when the nozzle boss 40 is inserted into the first sub- Increases the bond strength. The projecting portion 43 and the wing portion 44 may be formed in various shapes such as a ring shape or a saw tooth shape surrounding the outer surface of the nozzle body 41. [ The through hole 45 is formed in the wing portion 44. The synthetic resin constituting the first coupling boss portion 23 is introduced into the through hole 45 when the insert is injected, 1 serves to increase the binding force of the sub liner 22. [

The projecting portion 43 is provided with an insertion groove 46 for engagement of the sealing member 47. The sealing member 47 can be stably coupled to the projection 43 by inserting an inner part of the sealing member 47 into the insertion groove 46. [ The sealing member 47 is insert-injected with the first sub-liner 22 while being coupled to the projecting portion 43. [ The sealing member 47 may be made of various materials having a melting point higher than that of the synthetic resin so as not to be melted or deformed in contact with the high-temperature synthetic resin melt when the insert is injected. A plurality of sealing members 47 which are coupled to the plurality of projections 43 and interposed between the first sub liner 22 and the nozzle boss 40 are arranged in a state in which the sealing force between the first sub liner 22 and the nozzle boss 40 .

2 and 3, after the first sub-liner 22 is insert-injected together with the nozzle boss 40, the first engaging boss portion 23 of the first sub- The inner compression ring 50 and the first outer compression ring 55 are combined to increase the coupling force between the first sub liner 22 and the nozzle boss 40. The first inner compression ring 50 is fitted on the outer surface of the first inner protrusion 25 protruding inward of the first sub-liner 22 of the first engaging boss 23 to form a first inner protrusion 25 And is pressed onto the outer surface of the inserted nozzle boss 40. The first outer compression ring 55 is fitted on the outer surface of the first outer protrusion 26 protruding outward of the first sub-liner 22 of the first coupling boss 23 to form the first outer protrusion 26 And is pressed onto the outer surface of the inserted nozzle boss 40. The first inner compression ring 50 is provided at its one inner portion with a curved beveled portion so as to be smoothly fitted into the first coupling boss portion 23, Shaped chamfered portion so as to be smoothly engaged with the engaging boss portion 23.

The first engaging boss portion 23 of the first sub-liner 22 is tightened toward the nozzle boss 40 by the action of the first inner compression ring 50 and the first outer compression ring 55, And the nozzle boss 40 is improved. The first inner compression ring 50 and the first outer compression ring 55 are made of a material having a higher strength than the first coupling boss portion 23 such as a metal to press the first coupling boss portion 23 of the first sub- Material. The first inner compression ring 50 and the first outer compression ring 55 improve the coupling force between the first sub liner 22 and the nozzle boss 40 and at the same time by wrapping the outer surface of the first coupling boss portion 23 And serves as a reinforcing material for reinforcing the strength of the first sub-liner 22.

The first sub liner 22 coupled with the nozzle boss 40 and the first inner compression ring 50 and the first outer compression ring 55 is coupled to one end of the main liner 21. The first sub-liner 22 and the main liner 21 may be joined by various known techniques for bonding synthetic resin compositions such as fusing.

1 and 4, the second sub-liner 28 coupled to the other end of the main liner 21 is provided with a second engaging boss 29 having an engaging hole 30 formed at the center thereof, A metal fixing boss (60) is inserted into the engaging hole (30) of the second engaging boss portion (29). The fixed boss 60 includes a nozzle body 61 having a fixing groove 62 formed at the center thereof, a plurality of projections 63 protruding from the outer surface of the nozzle body 61, And a wing portion 64 protruding from the wing portion 64. The fixing boss 60 is for engaging with a fixing device for fixing the high-pressure vessel 10, and a threaded portion for screw connection with the fixing device is provided inside the fixing groove 62 of the nozzle body 61 .

The fixing boss 60 is integrally manufactured through the second sub-liner 28 and the insert injection. A plurality of protrusions 63 protruding outward from the nozzle body 61 and a wing portion 64 protrude from the second sub liner 28 when the fixing boss 60 is insert- Increases the bond strength. The projecting portion 63 and the wing portion 64 may be formed in various shapes such as a ring shape or a saw tooth shape surrounding the outer surface of the nozzle body 61. The through hole 65 is formed in the wing portion 64. The synthetic resin constituting the second engaging boss 29 is introduced into the through hole 65 when the insert is injected, 2 serves to increase the cohesion of the sub liner 28.

The projecting portion 63 is provided with an insertion groove 66 for engagement of the sealing member 67. The sealing member 67 can be stably engaged with the projection 63 by inserting an inner part of the sealing member 67 into the insertion groove 66. [ The sealing member 67 is insert-injected with the second sub-liner 28 while being coupled to the projecting portion 63. The sealing member 67 may be made of various materials having a melting point higher than that of the synthetic resin so as not to be melted or deformed in contact with the high-temperature synthetic resin melt when the insert is injected. A plurality of sealing members 67 which are coupled to the plurality of projections 63 and interposed between the second sub liner 28 and the fixed bosses 60 are disposed between the second sub liner 28 and the fixed bosses 60, .

The second sub liner 28 is inserted and injected together with the fixing boss 60 in the same manner as the process of joining the nozzle boss 40 and the first sub liner 22, The second inner compression ring 70 and the second outer compression ring 75 are coupled to the boss 29 to increase the coupling force between the second sub liner 28 and the fixed boss 60. The second inner compression ring 70 is fitted on the outer surface of the second inner protrusion 31 protruding inward of the second sub-liner 28 of the second engaging boss 29 to form a second inner protrusion 31 And is pressed onto the outer surface of the inserted fixed boss 60. The second outer compression ring 75 is fitted to the outer surface of the second outer protrusion 32 protruding outside the second sub-liner 28 of the second coupling boss 29 to form the second outer protrusion 32 And is pressed on the outer surface of the inserted fixing boss 60. The second inner compression ring 70 is provided at its one inner portion with a curved face portion for smoothly fitting into the second engaging boss portion 29, Shaped chamfered portion so as to be smoothly engaged with the engaging boss portion 29. [

The second engaging boss portion 29 of the second sub liner 28 is tightened toward the fixed boss 60 by the action of the second inner compression ring 70 and the second outer compression ring 75 to thereby form the second sub liner 28, And the fixing boss 60 are improved. The second inner compression ring 70 and the second outer compression ring 75 are made of a material having a higher strength than that of the second coupling boss 29 such as a metal such that the second coupling boss 29 of the second sub- Material. The second inner compression ring 70 and the second outer compression ring 75 improve the coupling force between the second sub liner 28 and the fixed boss 60 and at the same time by wrapping the outer surface of the second coupling boss 29 And serves as a reinforcing material for reinforcing the strength of the second sub-liner 28.

The second sub liner 28 coupled with the fixed boss 60 and the second internal compression ring 70 and the second external compression ring 75 is coupled to the other end of the main liner 21. Various known techniques for joining the synthetic resin composition, such as fusing, may be used for the joining of the second sub-liner 28 and the main liner 21.

The synthetic resin liner 20 having the nozzle bosses 40 and the fixed bosses 60 at both ends thereof is connected to the first sub-liner 22 and the second sub-liner 28 at one end and the other end of the main liner 21, ) Is completed. When the synthetic resin liner 20 is completed, the synthetic resin liner 20 is impregnated with a polymer resin such as epoxy resin or the like on the outer surface of the synthetic resin liner 20 and then wound on the outer surface of the synthetic resin liner 20 to form a reinforcing layer, (10) can be completed. The supplementary reinforcement layer 80 may be provided at a portion where the first sub-liner 22 is located and a portion where the second sub-liner 28 is located.

The high pressure vessel 10 according to the present invention is constructed such that the first sub liner 22 of the synthetic resin material and the metallic nozzle boss 40 are insert injected and then the first internal lining 22 The coupling strength between the first sub liner 22 and the nozzle boss 40 is improved and the strength of the first sub liner 22 is improved. After the second sub-liner 28 and the metallic fixing boss 60 of the synthetic resin material are insert-injected, the second inner compression ring 70 and the second outer compression ring 75 are coupled to the second sub-liner 28 The bonding force between the second sub liner 28 and the fixed boss 60 is improved and the strength of the second sub liner 28 is improved. Therefore, the risk of leakage of the high-pressure gas is small and the durability is excellent.

Only one of the first inner compression ring 50 or the first outer compression ring 55 is coupled to the first coupling boss portion 23 of the first sub-liner 22 so that the first coupling boss portion 23, The bonding strength between the bosses 40 can be increased. The second inner compression ring 70 or the second outer compression ring 75 is coupled to the second coupling boss 29 of the second sub-liner 28 so that the second coupling boss 29 and the fixing boss 60 are engaged with each other. Can be increased. Further, the fixing boss 60 and the second sub-liner 28 may be omitted. The synthetic resin liner 20 has a main liner having one end opened and a closed end at the other end, a first sub liner 22 coupled to one end of the main liner and covering one end of the main liner and having a nozzle boss 40 at the center, ≪ / RTI > And

The embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art can improve and modify the technical idea of the present invention in various forms. Accordingly, these modifications and variations are intended to fall within the scope of the present invention as long as it is obvious to those skilled in the art.

10: high-pressure vessel 20: synthetic resin liner
21: main liner 22, 28: first and second sub liner
23, 29: first and second engaging boss portions 25, 31: first and second inner protrusions
26, 32: first and second outer projections 35: reinforcing layer
40: nozzle boss 41, 61: boss body
42: flow path 43, 63:
44, 64: wing portion 47, 67: sealing member
50, 70: first and second inner compression rings 55, 75: first and second outer compression rings
60: Fixed boss

Claims (13)

A synthetic resin liner having a hemispherical first sub liner having a main liner having a storage space therein and a first engaging boss portion coupled to one end of the main liner and having an engaging hole at the center;
A reinforcing layer surrounding the outer surface of the synthetic resin liner;
A metallic nozzle boss inserted into an engaging hole of the first engaging boss portion and having a flow path for fluid flow in the center thereof; And
And a first inner compression ring which is fitted on the outer surface of the first inner protrusion protruded to the inner side of the first sub-liner of the first fitting boss unit and presses the first inner protrusion on the outer surface of the nozzle boss inserted therein Lt; / RTI >
The method according to claim 1,
Wherein a protruding portion for protruding outwardly is provided on an outer surface of the nozzle boss for increasing a coupling force with the first engaging boss portion.
3. The method of claim 2,
Wherein a protruding portion of the nozzle boss is provided with an insertion groove, and a sealing member is inserted into the insertion groove such that the sealing member is interposed between the nozzle boss and the first engagement boss portion.
The method according to claim 1,
The nozzle boss is coupled to the first engaging boss portion through an insert injection, the wing portion protrudes from an outer surface of the nozzle boss, and a through hole is formed in the wing portion such that synthetic resin constituting the first engaging boss portion flows into the nozzle boss. Pressure vessel.
The method according to claim 1,
And a first outer compression ring fitted to the outer surface of the first outer protrusion protruded to the outside of the first sub-liner of the first coupling boss unit to press the first outer protrusion on the outer surface of the nozzle boss inserted therein Lt; / RTI >
The method according to claim 1,
A second sub liner having a second engaging boss portion having a central engaging hole formed therein, the second sub liner being coupled to the other end of the main liner and constituting the synthetic resin liner together with the main liner and the first sub liner;
A metallic fixing boss inserted into the coupling hole of the second coupling boss portion and having a fixing groove formed at the center thereof; And
And a second inner compression ring fitted to the outer surface of the second inner protrusion protruding inward of the second sub-liner of the second coupling boss portion to press the second inner protrusion on the outer surface of the fixed boss inserted therein Pressure vessel.
The method according to claim 6,
Wherein a protruding portion for increasing a coupling force with the second engaging boss portion is protruded outward from the outer surface of the fixed boss, and a sealing member is formed in the insertion groove formed in the protruding portion of the fixed boss, between the fixed boss and the second engaging boss portion Is inserted so as to be interposed therebetween.
The method according to claim 6,
And a second outer compression ring fitted to the outer surface of the second outer protrusion protruded to the outside of the second sub-liner of the second coupling boss unit to press the second outer protrusion on the outer surface of the fixed boss inserted therein Lt; / RTI >
(a) preparing a metallic nozzle boss in which a flow path for fluid flow is formed in the center;
(b) insert-injecting a hemispherical first sub-liner having a first engaging boss portion formed with a coupling hole at the center with the nozzle boss so that the nozzle boss is inserted into the engaging hole;
(c) a first inner compression ring is fitted to an outer surface of a first inner protrusion protruding inward of the first sub-liner of the first coupling boss portion to press-fit the first inner protrusion to an outer surface of the nozzle boss inserted therein step;
(d) forming the synthetic resin liner by coupling the first sub-liner having the nozzle boss coupled thereto to one end of a main liner having a storage space therein; And
(e) forming a reinforcing layer on the outer surface of the synthetic resin liner.
10. The method of claim 9,
Wherein a protrusion is formed on an outer surface of the nozzle boss to increase a coupling force with the first coupling boss portion in the step (a).
11. The method of claim 10,
Wherein the nozzle boss and the first sub-liner are insert-injected in a state where the sealing member is engaged with the outer surface of the protrusion in the step (b).
10. The method of claim 9,
The first outer compression ring may be inserted into the outer surface of the first outer protrusion protruded to the outside of the first sub-liner of the first coupling boss unit in the step (c) so that the first outer protrusion is inserted into the outer surface of the nozzle boss Pressure vessel.
10. The method of claim 9,
Prior to step (d)
(I) preparing a metallic fixing boss;
(Ii) insert-injecting a semi-spherical second sub-liner having a second engaging boss portion formed with a coupling hole at the center with the fixing boss so that the fixing boss is inserted into the engaging hole of the fixing boss; And
(Iii) a second inner compression ring is fitted to an outer surface of a second inner protrusion protruding inward of the second sub-liner of the second coupling boss portion to press the second inner protrusion on the outer surface of the fixed boss inserted therein Further comprising:
Wherein the synthetic resin liner is formed by joining the second sub liner with the fixed boss in the step (d) to the other end of the main liner.

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