WO2017200206A1

WO2017200206A1 - Pressure vessel

Info

Publication number: WO2017200206A1
Application number: PCT/KR2017/003719
Authority: WO
Inventors: 허석봉; 김종열; 김도연
Original assignee: 일진복합소재 주식회사
Priority date: 2016-05-18
Filing date: 2017-04-05
Publication date: 2017-11-23
Also published as: KR20170130649A

Abstract

The present invention relates to a pressure vessel. Particularly, the pressure vessel according to the present invention comprises: a nozzle boss provided with a hollow neck part, a flange part extended outward from the neck part, and a hollow protrusion part extended from an end part of the neck part; a liner coupled to the flange part of the nozzle boss and providing a fluid-filling space therein; and a sealing part, a pressurization part, an elastic member and a pressurization-enhancing part which are sequentially inserted from the outside along the outer circumferential surface of the protrusion part. Here, the sealing part blocks the direct contact of the fluid with respect to the boundary between the flange part and the liner, thereby preventing the leakage of the fluid through the boundary; the pressurization part pressures the sealing part in the upward axial direction; the pressurization-enhancing part is coupled to the protrusion part, thereby providing a pressurizing force to the pressurization part and maintaining the force; and the elastic member is provided between the pressurization part and the pressurization-enhancing part. The pressure vessel according to the present invention is provided with the elastic member between the pressurization-enhancing part and the pressurization part, such that, in case of repeated use, the reduction of the fixing force for maintaining the coupling force between components, that is, the nozzle boss and the liner, can be maximally delayed, and a tightly sealed structure enabled by the sealing part can be maintained via constant elasticity.

Description

[Revision 19.05.2017 under Rule 26] Pressure vessel

The present invention relates to a pressure vessel, and more particularly to a pressure vessel having a structure for firmly maintaining the fixing force / coupling force between the nozzle boss and the liner.

A pressure vessel is a vessel used to store various fluids such as oxygen, natural gas, nitrogen, and hydrogen, and conventionally manufactures a nozzle boss and a liner made of a metallic material, and wraps carbon fibers or glass fibers on the outside of the nozzle boss and the liner. Or laminated. However, a pressure vessel made of a conventional metallic liner has a problem in that the weight of the metal is heavy, very weak to corrosion and at the same time high in manufacturing cost.

In order to solve this problem, a plastic liner using a synthetic resin was manufactured. As a result, plastics were lighter in weight and improved in corrosion resistance than metal materials.

However, even in the case of manufacturing a pressure vessel using a plastic liner, the nozzle boss had to use a metal liner and other metal or non-metal material, which lowered the bonding force between the metal liner and the non-metal nozzle boss and the plastic liner, which did not occur when the metal liner was used. A new problem has arisen.

That is, in case of using the existing metal liner, there was no great pressure to firmly bond the liner and the nozzle boss, but in the case of using the plastic liner, perfect bonding between plastic, metal and nonmetal due to the characteristics of the manufacturing process and materials There was a problem implementing the state.

In order to solve the above problems, a conventional plastic fastener for binding the plastic liner and the metallic nozzle boss is used, but this causes another problem that it is difficult to install the fastener inside the plastic liner.

Alternatively, grooves in the nozzle boss were used to insert the nozzle boss into the plastic liner, but this was also somewhat difficult to realize a perfect joint state.

The present invention provides a pressure vessel capable of preventing the outflow of abnormal fluid by maintaining the fixing force to maintain the coupling structure between the liner and the nozzle boss in the repeated filling and discharge of the fluid.

The pressure vessel according to the present invention comprises: a nozzle boss having a neck portion formed in a hollow shape, a flange portion extending outwardly from the neck portion, and a protrusion extending in a hollow form from one end of the neck portion; A liner coupled to the flange portion of the nozzle boss and providing a fluid filling space therein; And a sealing part, a pressing part, an elastic member, and a pressure enhancing part which are sequentially extrapolated along the outer circumferential surface of the protrusion. In this case, the sealing part prevents the direct contact of the fluid with the boundary between the flange part and the liner to prevent the outflow of the fluid through the boundary, and the pressing part presses the sealing part upward in the axial direction, and the pressing The enhancement part is coupled to the protrusion to provide and sustain the pressing force to the pressing part, and the elastic member is provided between the pressing part and the pressing improving part.

In addition, the elastic member may be formed in a ring shape and extrapolated to the protrusion.

In addition, the elastic member may be formed in a ring shape inclined in any direction of the downward or upward in the outward direction from the central axis.

In addition, the elastic member may be provided in plural, and may be extrapolated to the protruding portion in a vertically stacked state.

In addition, the elastic member may be formed in a wave shape along the circumferential direction.

In addition, the sealing part may be formed of a silicon material.

In addition, the sealing portion may be formed bent upwardly bent in close contact with the boundary region of the flange portion and the liner.

In addition, the pressing portion may be formed with at least one pressing hole so that the space portion formed inside the bent portion of the sealing portion and the inner space of the liner communicate.

In addition, the pressure enhancing portion may be fastened to the protrusion by screwing.

According to the pressure vessel according to the present invention, by providing an elastic member between the pressure enhancing portion and the pressing portion to retard the reduction of the fixing force for maintaining the bonding force between the components, that is, between the nozzle boss and the liner in repeated use as possible, There is an effect that can maintain the airtight structure by the sealing portion with a constant elasticity.

In addition, the boundary between the nozzle boss and the liner and the contact with the fluid can be prevented while the non-ideal outflow path of the fluid can be blocked in advance.

In addition, even when the internal pressure is low pressure, the adhesion between the nozzle boss and the liner can be enhanced.

1 is a schematic partial cutaway perspective view of a pressure vessel according to an embodiment of the present invention.

2 is a schematic partial cross-sectional view showing a pressure vessel according to an embodiment of the present invention.

3 is an enlarged view schematically illustrating a portion A of FIG. 2.

4 is a schematic enlarged view illustrating an enlarged portion of FIG. 3.

Figure 5 is a schematic exploded perspective view (composite material omitted) showing a pressure vessel according to an embodiment of the present invention.

6 is a perspective view schematically illustrating a state of an elastic member according to an exemplary embodiment.

7 is a longitudinal sectional view showing a state of the elastic member according to FIG. 6.

FIG. 8 is a longitudinal cross-sectional view illustrating a state in which a plurality of elastic members of FIG. 6 are used.

9 is a perspective view schematically showing an elastic member according to another embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Unless otherwise defined or mentioned, terms indicating directions used in the present description are based on the states shown in the drawings. In addition, the same reference numerals throughout the embodiments indicate the same member. On the other hand, each of the components shown in the drawings may be exaggerated in thickness or dimensions for the convenience of description, and does not mean that actually should be configured by the ratio between the dimensions or configurations.

1 to 5, a pressure vessel according to an embodiment of the present invention will be described. 1 is a schematic partial cutaway perspective view showing a pressure vessel according to an embodiment of the present invention, Figure 2 is a schematic partial cross-sectional view showing a pressure vessel according to an embodiment of the present invention, Figure 3 A Is a schematic enlarged view. 4 is a schematic enlarged view illustrating a portion of FIG. 3 in an enlarged scale, and FIG. 5 is a schematic exploded perspective view (a composite material is omitted) showing a pressure vessel according to an embodiment of the present invention.

Hereinafter, for convenience of description, terms related to directions are defined as follows. 2, the outer or inner direction in the radial direction may refer to a direction X toward the outer circumferential surface from the center C of the neck portion 110 or an opposite direction, and the upper or lower direction in the axial direction. The direction Y toward the upper surface from the lower surface of the neck portion 110 may mean the opposite direction.

Pressure vessel 10 according to an embodiment of the present invention is a container used for storing various fluids, such as oxygen, natural gas, nitrogen, hydrogen, etc., is provided to enable the repeated filling and discharge of the fluid. . Here, the pressure vessel 10 is coupled to the nozzle boss 100, the nozzle boss 100, which serves as a passage for filling and discharging the fluid as shown in FIG. 1, and a liner 200 providing a filling space therein. And it may include a separation prevention portion 300 to prevent the separation between the nozzle boss 100 and the liner 200.

In addition, the pressure vessel 10 has a predetermined thickness by the composite material 400 to the outside of the nozzle boss 100 and the liner 200 in order to improve the pressure resistance after the nozzle boss 100 and the liner 200 are combined. It can also be wound. This will be described later.

The nozzle boss 100 may be provided with a hollow portion 110, that is, a hollow portion 110 having a hollow and a flange portion 120 extending radially outward from an approximately lower end of the neck portion 110. have.

1 to 3, a thread is formed on the upper inner circumferential surface of the neck part 110. When the fluid is filled into the pressure vessel 10 by using a screw thread formed on the inner circumferential surface of the neck portion 110, or when the fluid is discharged from the pressure vessel 10 to the outside, the fluid is randomly discharged by screwing with an external device. You can prevent it.

Meanwhile, referring to FIGS. 1 to 4, the flange portion 120 extends radially outward from an approximately lower end of the neck portion 110. The flange portion 120 may be formed integrally with the neck portion 110 as one component of the nozzle boss 100 described above or may be formed by mechanical coupling. The flange portion 120 is combined with the liner 200 to be described later to form an airtight structure.

The nozzle boss 100, that is, the neck part 110 and the flange part 120 may be manufactured by processing steel, aluminum, and plastic, and when the manufacturing is completed, the nozzle boss 110 may be formed by the upper mold 22 and the lower part. After inserting into the internal space (S3) of the injection mold 20, which is composed of a mold 24, the synthetic resin P is introduced into the injection mold 20 to form a liner 200 coupled with the nozzle boss 100. can do. That is, the liner 200 may be manufactured by the nozzle boss 100 and the insert injection, and may be made of plastics.

As shown in Figure 1 and 2, the liner 200 is a kind of plastic barrel having a predetermined internal space, both ends are hemispherical, the center portion may be a hollow pipe shape.

However, the liner 200 may be manufactured separately from the hemispherical portion and the central cylindrical portion, respectively, instead of being manufactured in one piece, and then may be bonded to each other by a process such as heat fusion. In this case, since the sealing part 500, the pressing part 600, and the pressure improving part 700, which will be described later, are positioned inside the liner 200, assembly can be facilitated.

On the other hand, the pressure vessel 10 according to the present invention, as shown in Figures 2 to 4 to prevent the separation between the nozzle boss 100 and the liner 200, the separation prevention portion surrounded by the liner 200 ( 300). The separation prevention part 300 may be disposed in a space provided by the boundary between the nozzle boss 100 and the liner 200.

Specifically, the flange portion 120 of the nozzle boss 100 is a liner 200 is disposed to be fixed to the inner portion 130 is formed in the radially inward to fix the liner 200 to the flange portion 120. It can be provided. The fixing part 130 means a kind of coupling space for the liner 200 to be coupled to the flange part 120. The fixing part 130 may be formed in various structures in addition to the coupling structure and the coupling shape according to the present embodiment.

That is, the fixing part 130 may be a coupling structure, which is provided near the boundary between the nozzle boss 100 and the liner 200, and preferably a space for coupling. A synthetic resin or the like is injected around the fixing part 130 and the fixing part 130, that is, the main surface of the flange part 120 to form the liner 200.

Here, the fixing part 130 may be continuously formed along the circumferential direction, and may increase the coupling space to which the liner 200 is coupled toward the radially inner side. In other words, the fixing part 130 may have a shape in which the width in the axial direction increases toward the radially inner side, and is divided according to the width in the axial direction or the relative size of the coupling space to which the liner 200 is coupled. A first fixing part 132 and a second fixing part 134 formed larger than the first fixing part 132 may be provided.

The second fixing part 134 may be formed in the radially inner side of the first fixing part 132, and the cross section in the axial direction of the fixing part 130 may provide a coupling force between the liner 200 and the flange part 120. It may be cross-shaped to augment.

The liner 200 may include a fixing counterpart 210 corresponding to the shape of the fixing part 130 by insert injection. The liner 200 and the nozzle boss 100 may be stably coupled by the fixing part 130 and the fixing counterpart 210.

In this case, the general pressure vessel increases the internal temperature to about 80 when the fluid is pressurized and drops to about -40 when the fluid is rapidly discharged, so that the metallic or non-metallic nozzle boss and the plastic are repeated during the filling and discharging. The liner formed of the material may be separated from the boundary or the liner is folded due to the difference in the coefficient of thermal expansion. When the inside of the pressure vessel is high pressure, the boundary between the liner and the nozzle boss may be in close contact with each other to maintain airtightness, but at low pressure, there is a possibility that the outflow of non-ideal fluid may occur because the contact between the liner and the nozzle boss is not tight enough to maintain airtightness.

However, the pressure vessel 10 according to the present invention can minimize the possibility of separation of the nozzle boss 100 and the liner 200 due to the fixing portion 130 and the fixing corresponding portion 210 described above. That is, when the inside of the pressure vessel 10 is pressurized and expanded or discharged and contracted, the shape of the fixing part 130 is radially inward to form a coupling space to which the liner 200 is coupled or increases in the axial direction. Due to the structure of increasing the width of the liner 200 can minimize the separation from the nozzle boss (100).

On the other hand, the cross section in the axial direction of the fixing unit 130 is not limited to the cross shape mentioned above, if the liner 200 is a structure that can minimize the separation from the nozzle boss 100, circular, oval or various It may be formed in the shape of a polygon.

On the other hand, the neck portion 110 of the nozzle boss 100 may be provided with a protrusion 140 protruding in a tubular shape downward in the axial direction, the lower outer peripheral surface of the protrusion 140, the screw with the pressure improving portion 600 to be described later Threads can be formed for fastening.

In detail, the sealing portion 300, the pressing portion 500, the elastic member 410, and the pressing enhancement portion 600 may be inserted into and fixed to the protrusion 140 in the axial direction downward. The sealing part 300, the pressing part 500, and the elastic members 410 may be stably inserted and fixed to the protrusion part 140 by screwing the pressure improving part 600 and the protrusion part 140.

Here, the sealing part 500 is a component for preventing the non-ideal outflow of the fluid through the boundary between the nozzle boss 100 and the liner 200, the fluid to the boundary of the nozzle boss 100 and the liner 200 Block direct contact.

Specifically, the sealing part 300 according to the present embodiment may be formed as a ring-shaped plate circumferentially circumferentially as shown in FIGS. 4 and 5, in which the bent portion bent to protrude upward 310 may be formed. The bent portion 310 may be formed around the center portion of the ring-shaped plate shape of the sealing portion 300 or at least partially in the circumferential direction. The bent portion 310 directly contacts the boundary between the liner 200 and the flange portion 120 to prevent the fluid from directly contacting the liner 200 and the flange portion 120, and the liner 200 and the flange portion By pressing the boundary portion of the 120 to prevent the liner 200 from being separated from the flange portion 120 to increase the coupling force between the liner 200 and the flange portion 120.

In addition, the sealing part 500 is formed of a silicon material, even when the pressure vessel 10 expands and contracts after the contraction of the flange portion 120 of the liner 200 by the internal pressure of the pressure vessel 10. ) To prevent the separation of the liner 200 and the nozzle boss 100 in advance. That is, the sealing unit 300 blocks the outflow of the fluid through the boundary between the liner 200 and the nozzle boss 100, that is, blocks the path of the fluid outflow, so that the internal pressure even when the inside of the pressure vessel 10 is low pressure. The sealing unit 300 is continuously pressed to prevent the leakage of non-ideal fluid.

Meanwhile, the fixing force of the sealing part 300 to the protrusion 140 may be implemented by the pressing part 500 which presses the sealing part 300 upward in the axial direction. The pressing unit 500 may be formed in a circular ring shape, and presses the sealing unit 300 from the lower end of the sealing unit 300 to allow the sealing unit 300 to receive upward pressing force.

Continuous pressurization by the internal pressure to the sealing part 300, that is, the pressure transfer of the fluid to the sealing part 300 is carried out in at least one pressure hole 510 formed in the pressing part 500 despite the pressing part 500. Can be reinforced. The pressure hole 510 may be formed such that the inner space formed by the liner 200 and the space formed in the shape impregnated by the bent portion 310 described above communicate with each other. The pressure in the pressure vessel 10 may be transmitted to the bent portion 310 through the pressure hole 510. The width in the radial direction of the pressing part 500 is preferably equal to or larger than the width in the radial direction of the sealing part 300.

On the other hand, the bottom of the sealing portion 300 may include a protrusion 320 protruding toward the pressing portion 500 to improve the adhesion with the pressing portion 500, the protrusion 520 along the circumferential direction It can be formed continuously in at least one or more rows. Here, the protrusion 320 may be elastically deformed and compressed by the pressing force by the pressing unit 500. Due to the protrusion 320, the adhesion between the sealing unit 300 and the pressing unit 500 may be further improved.

The elastic member 410 is provided at the bottom of the pressing unit 500. The elastic member 410 according to the present embodiment is formed in a ring shape, and has elasticity with respect to the force in the axial direction. In addition, the lower end of the elastic member 410 is provided with a pressure improving portion (600). The pressure enhancing part 600 is coupled to the protrusion 140 by a screwing method.

When the pressure enhancing part 600 is upwardly pressed by the screwing method, the pressing force is transmitted to the fixing part 500 and the sealing part 300 through the elastic member 410. At this time, the elastic member 410 is the elastic force is increased by changing the shape as the pressure improving part 600 is pressed, and even after the pressure improving part 600 is fixed using the elastic force to press the pressing part 500 continuously. Done.

Assuming that there is no elastic member 410, the pressure enhancing unit 600 pressurizes the pressing unit 500 with a constant force in the initial stage of manufacturing, but as the use time of the pressure vessel 10 is continued The coupling force between the 600 and the protrusion 140 may be loosened. In this case, as the overall pressing force is reduced, the pressing force for the pressing part 500 to press the sealing part 300 may also be reduced, which may cause a problem in the overall airtight structure.

However, since the elastic member 410 according to the present embodiment is provided, if the distance between the pressure applying unit 600 and the pressing unit 500 does not open for a predetermined time or more, the elastic member 410 is pressed by the elastic force maintained by the elastic member 410. By pushing the part 500 upward, the pressing force for pressing the sealing part 300 can be maintained. That is, the elastic member 410 performs a function of maintaining the maximum pressing force that can maintain the airtight structure of the sealing unit 300.

On the other hand, the pressure enhancing unit 600 and the protrusion 140 according to the present embodiment is implemented in a screw fastening structure, there is no limitation in the coupling method of the pressure enhancement unit 600 and the protrusion 140, coupled in various ways This is possible.

On the other hand, the pressure vessel 10 according to the present invention may further include a composite 400 to surround the outside of the liner 200 to improve the pressure resistance, the composite 400 is carbon fiber, glass fiber or synthetic polyamide Reinforcing fibers such as fibers may be impregnated with a resin such as an epoxy resin, and the resin may be wound or laminated on a filament to form a predetermined thickness on the outside of the liner 200. In this case, the composite material 400 may be wound or laminated from an outer surface of the neck portion 110 of the nozzle boss 100.

An elastic member according to an embodiment of the present invention will be described with reference to FIGS. 6 to 9. 6 is a perspective view schematically illustrating a state of an elastic member according to an embodiment, and FIG. 7 is a longitudinal cross-sectional view illustrating a state of an elastic member according to FIG. 6. 8 is a longitudinal cross-sectional view illustrating a state in which a plurality of elastic members of FIG. 6 are used, and FIG. 9 is a perspective view schematically illustrating an elastic member according to another embodiment.

As illustrated in FIGS. 6 and 7, the elastic member 410 according to the present exemplary embodiment may be provided as a ring spring or a plate spring. The elastic member 410 may be formed of a ring-like spring steel is formed to be inclined downward toward the outside. The elastic member 410 according to the present embodiment is deformed into a shape that is flattened by the force in the vertical direction, and the elastic force increases according to the shape deformation of the elastic member 410. Since the elastic member 410 is to provide an elastic force to the outside in the direction of restoring the circular shape.

On the other hand, the elastic member 410 according to the present embodiment can be used in a manner provided with a plurality of two or more in the vertical direction as shown in FIG. That is, the plurality of elastic members 410 may be used together by including a pair of elastic members 410 and having the bottom surfaces of the elastic members 410 contact each other based on FIG. 7.

For example, as shown in (a) of FIG. 8, the elastic members 410 (a) may be used in a state in which the long radius sides are in contact with each other, and in contrast, the elastic members 410 (a) are in contact in the short radius sides. Members 410 (b) may be used. At this time, in the case of the embodiment according to FIG. 8, the elastic modulus by the elastic member 410 is reduced, but the length that can be covered by the elastic member 410, that is, the distance that can provide a constant pressing force even if the pressure improving part is loosened increases. You can get the effect.

Meanwhile, as shown in FIG. 9, a ring-shaped leaf spring 410a formed in a wave shape in a circumferential direction may also be used. In the case of the wavering leaf spring 410a, when the pressure enhancing part is pressed, the elastic force is increased by deforming the shape to a flat ring shape. The leaf spring 410a according to the present embodiment is provided between the pressure increasing part and the pressing part like the elastic member illustrated in FIG. 6 to provide a constant elastic force to maintain the airtight structure of the sealing part for a long time.

Although the preferred embodiment of the present invention has been described above, the technical idea of the present invention is not limited to the above-described preferred embodiment, and may be variously implemented in a range without departing from the technical idea of the present invention specified in the claims. have.

Claims

A nozzle boss including a hollow neck portion, a flange portion extending outwardly from the neck portion, and a protrusion extending hollowly from one end of the neck portion;

A liner coupled to the flange portion of the nozzle boss and providing a fluid filling space therein; And

Includes a sealing portion, a pressing portion, an elastic member and a pressure enhancing portion sequentially extrapolated along the outer peripheral surface of the protrusion,

The sealing part blocks direct contact of the fluid to the boundary of the flange portion and the liner to prevent the outflow of the fluid through the boundary,

The pressing portion presses the sealing portion upward in the axial direction,

The pressing enhancement portion is combined with the protrusion to provide and sustain the pressing force to the pressing portion,

The elastic member is a pressure vessel provided between the pressing portion and the pressure enhancing portion.
The method of claim 1,

The elastic member is formed in a ring shape pressure vessel is extrapolated to the protrusion.
The method of claim 2,

The elastic member is a pressure vessel which is a plate-shaped leaf spring formed in a ring shape inclined in either the direction downward or upward from the central axis outward.
The method of claim 3,

The elastic member is provided with a plurality, the pressure vessel is extrapolated to the protruding portion in the vertically stacked state.
The method of claim 2,

The elastic member is a pressure vessel is a wave ring-shaped leaf spring is formed in a wave shape along the circumferential direction.
The method of claim 1,

The sealing container is formed of a silicon material.
The method of claim 1,

The sealing container is a pressure vessel is formed bent upwardly bent in close contact with the boundary region of the flange portion and the liner.
The method of claim 7, wherein

The pressure vessel is a pressure vessel in which at least one pressure hole is formed so that the space portion formed inside the bent portion of the sealing portion and the inner space of the liner communicate.
The method of claim 1,

The pressure enhancing portion is a pressure vessel is fastened to the protrusion and the screwing method.