WO2017200208A1

WO2017200208A1 - Pressure vessel provided with impact-resistant member

Info

Publication number: WO2017200208A1
Application number: PCT/KR2017/003721
Authority: WO
Inventors: 허석봉; 박재성; 박재우
Original assignee: 일진복합소재 주식회사
Priority date: 2016-05-18
Filing date: 2017-04-05
Publication date: 2017-11-23
Also published as: KR20170130651A; KR101944438B1

Abstract

The present invention relates to a pressure vessel provided with an impact-resistant member, and the pressure vessel according to the present invention comprises: a nozzle boss for the inflow and outflow of a gas; a liner coupled to a flange part of the nozzle boss and providing a fluid-filling space therein; a composite wound around, or stacked on, the outside of the liner; and an impact-absorbing part provided so as to be adjacent to a minimum radius of curvature part in which the radius of curvature between the nozzle boss side of the liner and the side thereof is smallest, wherein the impact-absorbing part has a transformation space part therein such that the shape of the impact-absorbing part can be changed. The pressure vessel according to the present invention allows that the impact-absorbing member is provided with the space part therein allowing the shape thereof to be changed and thus, when an external impact is applied, the shape is changed and, moreover, the energy of the impact is consumed for the breakage of the impact-absorbing member, thereby minimizing the energy of the applied external impact so the energy cannot be transferred to the liner.

Description

Pressure vessel with impact resistant member

The present invention relates to a pressure vessel having an impact resistant member, and more particularly, to a pressure vessel having an impact resistant member for improving impact resistance in response to an oblique impact.

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, and due to the nature of plastic, it was possible to reduce the weight and improve corrosion resistance compared to a metal material.

On the other hand, in the case of using a plastic liner as described above, various standards are applied to prevent the pressure vessel from being damaged from an external impact, and among these, impact resistance against a certain amount of diagonal shock is a major indicator. By oblique impact, it means an impact applied to the shoulder portion of the pressure vessel, that is, the minimum radius of curvature formed around the nozzle boss. In the case of a diagonal shock, it is concentrated on the shoulder of the pressure vessel described above, and even a shock of the same size is a weak point for impact because the impact applied per single area is larger than that of other parts.

The present invention provides a pressure vessel having a structure that can improve the impact resistance against diagonal shock.

Pressure vessel according to the present invention is a nozzle boss for the gas flow in and out; A liner coupled to the flange portion of the nozzle boss and provided with a fluid filling space therein; A composite material wound or laminated on the outside of the liner; And an impact absorbing portion provided adjacent to a minimum radius of curvature of which the radius of curvature between the side of the nozzle boss of the liner is minimized. .

In addition, the shock absorbing unit may be provided between a plurality of layer structures forming the composite material.

In addition, the shock absorbing portion may be formed on the outside of the composite material.

In addition, the deformation space portion of the impact absorbing portion may be opened to the liner side.

In addition, the deformation space may be formed in plural.

In addition, the deformation space may be formed in an arc-shaped longitudinal section.

In addition, the deformation space portion of the shock absorbing portion may be filled with a filling material for shock absorption.

A second shock absorbing part having a reduced size compared to the shock absorbing part may be inserted into the deformation space part of the shock absorbing part.

Pressure vessel according to the present invention can be provided with an impact absorbing member inside or outside the composite to improve the impact resistance against diagonal shock.

In addition, the pressure vessel according to the present invention is provided with a space portion capable of deforming the shock absorbing member to the inside, so that when the external shock is applied, the impact energy is consumed to change the shape and further break the shock absorbing member. The impact energy is minimized to prevent the transfer to the liner side.

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

2 is a longitudinal cross-sectional view showing the pressure vessel of FIG.

3 is a partial cutaway perspective view of the pressure vessel in a state where the outer composite material is omitted.

4 and 5 are schematic diagrams for explaining the action of the shock absorbing member according to the external impact.

6 is a schematic view for explaining a pressure vessel according to a comparative example.

7 to 9 are partially enlarged views illustrating pressure vessels centered on shock absorbing members according to other embodiments.

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 3 will be described in the pressure vessel according to an embodiment of the present invention. 1 is a partial cutaway perspective view showing a pressure vessel according to an embodiment of the present invention, Figure 2 is a longitudinal cross-sectional view showing the pressure vessel of Figure 1, Figure 3 is a partial cutaway showing a pressure vessel in the state the outer composite is omitted. Perspective view.

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. ), The composite material (400, 400a) and the shock absorbing member 300 provided on the outside of the liner 200.

Referring to FIGS. 1 and 2, the nozzle boss 100 extends radially outward from an approximately lower end of the neck portion 110 and the neck portion 110 having a hollow inside, that is, having a hollow. The flange portion 120 may be provided.

A thread is formed on the upper inner circumferential surface of the neck portion 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.

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, plastic, and the like.

The nozzle boss 100 may further include components for improving airtightness and preventing leakage of internal gas or flowing out under a specific purpose, but the detailed description of the other components of the nozzle boss 100 will be omitted below. .

Liner 200 according to the present embodiment is a kind of cylinder having a predetermined internal space, both ends of the line is a hemispherical shape, the central portion may form a hollow pipe shape. As described above, the upper end of the liner 200 is connected to the flange 120 of the nozzle boss 100 to form an airtight structure. At this time, the shoulder portion SH is formed around the adjacent edge of the nozzle boss 100 of the liner 200 to minimize the radius of curvature based on the longitudinal section of FIG. 2. Shoulder portion (SH) is a portion formed essentially to form the pressure vessel 10 in a cylindrical shape has a vulnerability to the impact in the diagonal direction.

After the nozzle boss 100 and the liner 200 are combined, the composite material 400 may be formed on the outside of the nozzle boss 100 and the liner 200 to improve pressure resistance. The composite material 400 may be impregnated with a reinforcing fiber such as carbon fiber, glass fiber or synthetic polyamide fiber in a resin such as an epoxy resin, and may be formed to a predetermined thickness on the outside of the liner 200 by winding or laminating the resin. have. 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.

At this time, the shock absorbing member 300 is provided at a position corresponding to the shoulder portion SH described above. The shock absorbing member 300 may be formed of foamed synthetic resin having elasticity such as styrofoam.

The shock absorbing member 300 may be provided between the interlayer structures of the composite 400 wound or laminated in a plurality of layers, or may be provided on the outside of the composite 400. Hereinafter, for convenience of description, the composite material provided on the inner side of the shock absorbing member 300 is called the inner composite material 400, and the composite material wound or laminated on the outer side of the shock absorbing member 300 is called the outer composite material 400a. .

The shock absorbing member 300 is a component for minimizing deformation to other components such as the liner 200 by absorbing the impact in the diagonal direction, that is, the impact energy applied to the shoulder portion SH. The shock absorbing member 300 according to the present invention is characterized in that it has a predetermined space so that the deformation of the shape to the inner side of the shock absorbing member 300 itself is allowed.

The shock absorbing member 300 according to the present exemplary embodiment is provided around the nozzle boss 100 along the shoulder of the liner 200. The shock absorbing member 300 is preferably formed in an arc shape based on the longitudinal section. In addition, the shock absorbing member 300 is formed with a deformation space 310 is opened to the liner side (200). The deformation space 310 may be formed to have an arc shape with respect to the longitudinal section. In addition, the deformation space portion 310 may be formed in a continuous groove shape circumferentially along the shock absorbing member 300, it may be formed in a portion of the shock absorbing member 300 discontinuously.

However, the shock absorbing member 300 according to the present embodiment is intended to show the shape and structure as a preferred embodiment, and is not limited to the structure and shape according to the present embodiment, and a space portion for deformation into the inside thereof is formed. As long as it is, it can be applied as a shock absorbing member having various structures. For example, the deformation space 310 may be formed in another cross-sectional shape to facilitate deformation of the shock absorbing member, and the forming position may be changed, such as being formed inside the shock absorbing member 300.

In addition, referring to FIG. 3, after the composite 400 is wound or laminated on the outside of the liner 200, the shock absorbing member 300 may be attached to the shoulder portion of the composite 400. It is possible to form a pressure vessel by further winding an additional composite material on the outside of the attached shock absorbing member 300.

4 to 6 will be described the operation of the shock absorbing member according to the external shock. 4 and 5 are schematic diagrams for explaining the action of the shock absorbing member according to the external impact, Figure 6 is a schematic diagram for explaining the pressure vessel according to the comparative example.

As shown in FIG. 4, when an external force F, i.e., an oblique impact is applied from the outside of the outer composite material 400a corresponding to the shock absorbing member 300 located at the shoulder portion, from the outer composite material 400a at that point. Deformation energy according to the impact is transmitted toward the shock absorbing member (300). Accordingly, the outer composite material 400a and the shock absorbing member 300 are pressed by the external force, and the shock absorbing member 300 starts to be deformed toward the deformation space 310. In addition, when the deformation proceeds to a certain degree or more, the shock absorbing member 300 may be broken.

The deformation and breaking of the shock absorbing member 300 consumes energy. Impact energy concentrated on the shoulder portion according to the external impact is consumed in a significant amount to change and break the shape of the shock absorbing member 300 in this way. Therefore, in the case of the pressure vessel 10 having the shock absorbing member 300 according to the present embodiment, the amount of impact energy transmitted to the inner liner 200 may be minimized.

In the case of the pressure vessel shown in FIG. 6, the shock transmitted through the composite material 400 is transferred to the liner 200 as it is, and thus exhibits very vulnerable to diagonal shock.

Even when a member such as styrofoam is simply added to the shoulder portion for absorbing the shock, it is also possible to absorb a certain shock by causing elastic deformation according to the characteristics of the material such as styrofoam. In this case, however, the amount of impact that can be canceled is smaller than that of the shock absorbing member in which the deformation space portion in the embodiment of the present invention is formed.

7 to 9 will be described a pressure vessel including a shock absorbing member according to various embodiments. 7 to 9 are partially enlarged views illustrating pressure vessels centered on shock absorbing members according to other embodiments.

Referring to FIG. 7, in another embodiment, the shock absorbing member 300b may be formed with a plurality of deformation spaces 310b based on a longitudinal section. According to the position and the number of the deformation space (310b) it is possible to induce a high probability of the number and the location of the break when the shock absorbing member (300b).

In addition, as shown in FIG. 8, as another embodiment, it is also possible to include a second shock absorbing member 300 of a size acceptable within the deformation space of the shock absorbing member 300. In this case, the number of shock absorbing members to be deformed and / or broken before the external shock is transmitted to the liner 200 is increased, thereby reducing the amount of impact and impact energy transmitted to the liner side.

In addition, as shown in FIG. 9, it is also possible to accommodate a separate filler 330 in the deformation space 310 of the shock absorbing member 300 as another embodiment. As the filler 330, the same or similar material as that of the shock absorbing member 300 may be used. For example, the filler 330 may be manufactured using waste materials remaining after the shock absorbing member 300 is manufactured.

In this case, impact energy is consumed to deform and break the fillers 330 as compared with the above-described embodiment, thereby further reducing the amount of impact and impact energy transmitted to the liner side.

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 through which gas flows in and out;

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

A composite material wound or laminated on the outside of the liner;

And an impact absorbing part provided adjacent to the minimum radius of curvature of the liner to minimize the radius of curvature between the side of the nozzle boss of the liner.

The pressure absorbing portion is a pressure vessel in which the deformation space portion is formed inward to enable the shape change.
The method of claim 1,

The pressure absorbing portion is a pressure vessel provided between a plurality of layer structures forming the composite material.
The method of claim 1,

The pressure absorbing portion is a pressure vessel formed on the outside of the composite material.
The method of claim 1,

Deformation space portion of the shock absorbing portion is a pressure vessel formed in a predetermined space opened to the liner side.
The method of claim 4, wherein

The pressure vessel is formed in a plurality of deformation space.
The method of claim 4, wherein

The deformable space is a pressure vessel having a longitudinal cross-sectional shape is formed in an arc shape.
The method of claim 1,

The pressure vessel is filled with a filling for shock absorption in the deformation space portion of the shock absorbing portion.
The method of claim 1,

The pressure vessel in which the second shock absorbing portion is reduced in size compared to the shock absorbing portion in the deformation space portion of the shock absorbing portion.