WO2023211013A1

WO2023211013A1 - High-pressure gas storage container and method for manufacturing same

Info

Publication number: WO2023211013A1
Application number: PCT/KR2023/004905
Authority: WO
Inventors: 조명현
Original assignee: 홍덕산업(주)
Priority date: 2022-04-25
Filing date: 2023-04-12
Publication date: 2023-11-02
Also published as: KR102535772B1

Abstract

The present invention relates to a high-pressure gas storage container and a method for manufacturing the high-pressure gas storage container. The high-pressure gas storage container of the present invention comprises: a liner having a storage space therein; and a composite material layer coupled to the liner, wherein the composite material layer comprises a resin, fibers, and steel wires, and the method for manufacturing the high-pressure gas storage container, according to the present invention, comprises: a resin impregnation step of impregnating a plurality of fibers with a resin; a fiber supply step of supplying the plurality of fibers to a traverse device; a steel wire supply step of supplying a plurality of steel wires to the traverse device; an arrangement step of arranging, through an arrangement unit, the plurality of steel wires on the plurality of fibers impregnated with the resin and contacting each other; and a coupling step of coupling the composite material layer to the liner by winding the plurality of fibers and the plurality of steel wires around the liner.

Description

High-pressure gas storage container and method of manufacturing the same

The present invention relates to a high-pressure gas storage container and a method of manufacturing a high-pressure gas storage container, and more specifically, to using a composite material layer containing steel wire, fiber, and resin, and to forming the steel wire of the composite material layer into a network structure. Accordingly, it relates to a high-pressure gas storage container having excellent durability and shear strength and excellent impact toughness, and a method of manufacturing the same.

In accordance with the recent trend of reducing the weight of high-pressure gas containers, fiber-reinforced composite materials are being used as reinforcement materials for CNG tanks, hydrogen storage tanks, and special gas tanks. In addition, hydrogen is attracting attention as an eco-friendly fuel, and storage tanks with excellent hydrogen storage capabilities are being actively developed to use hydrogen as a fuel for automobiles, drones, PAVs, etc.

In addition, development of lightweight hydrogen storage tanks for hydrogen transportation and charging to build infrastructure for the hydrogen industry is also progressing rapidly.

Conventional hydrogen storage tanks use tanks made entirely of steel or tanks made by forming a reinforcing layer made of carbon fiber and resin on an aluminum liner. In addition, tanks made by forming a reinforcement layer made of carbon fiber and resin on an engineering plastic liner are also used.

Tanks made by forming a reinforcing layer made of carbon fiber and resin on an engineering plastic liner are widely used in hydrogen storage tanks for vehicles because they can be lightweight, and tanks made by forming a reinforcing layer made of carbon fiber and resin on an engineering plastic liner are widely used in hydrogen storage tanks. Development is underway for use in hydrogen transportation and charging stations.

However, tanks made by forming a reinforcing layer made of carbon fiber and resin on an engineering plastic liner have the following problems. Tanks made by forming a reinforcing layer made of carbon fiber and resin on an engineering plastic liner can be lightweight and have excellent tensile strength, but have low shear strength and low impact toughness, making them vulnerable to low temperatures and collisions.

Due to this problem, there is a disadvantage in using a tank made by forming a reinforcing material layer made of carbon fiber and resin on an engineering plastic liner as a hydrogen storage tank.

In addition, the carbon fiber used in a tank made by forming a reinforcing layer made of carbon fiber and resin on an engineering plastic liner is expensive, which increases the manufacturing cost of the hydrogen storage tank. Therefore, there is a need to develop a method of manufacturing a hydrogen storage tank at low cost while ensuring the stability of the hydrogen storage tank.

The present invention is intended to solve the above-mentioned problems, and more specifically, uses a composite material layer containing steel wire, fiber, and resin. By forming the steel wire of the composite material layer into a network structure, durability and shear strength are improved. It relates to a high-pressure gas storage container having excellent impact toughness and a method of manufacturing the same.

The high-pressure gas storage container of the present invention to solve the above-mentioned problems includes a liner having a storage space therein; A composite material layer coupled to the liner, wherein the composite material layer includes resin, fiber, and steel wire.

The volume ratio occupied by the steel wire in the composite material layer of the high-pressure gas storage container of the present invention to solve the above-described problem may be 3 to 50 vol %.

The volume ratio occupied by the steel wire in the composite material layer of the high-pressure gas storage container of the present invention to solve the above-described problem may be 50 to 80 vol %.

The fibers of the high-pressure gas storage container of the present invention to solve the above-described problems may include any one or more of carbon fibers, glass fibers, Basalt fibers, aramid fibers, and dyneema fibers.

The high-pressure gas storage container of the present invention to solve the above-described problem includes impregnating the plurality of fibers with the resin, arranging and contacting the plurality of steel wires on top of the plurality of fibers, and then arranging and contacting the plurality of steel wires with the plurality of fibers. The composite material layer may be coupled to the liner by wrapping a plurality of the steel wires around the liner.

In order to solve the above-described problem, the plurality of steel wires wound around the liner of the high-pressure gas storage container of the present invention may form a network structure.

A plurality of steel wires are arranged to be spaced apart in the composite material layer of the high-pressure gas storage container of the present invention to solve the above-described problem, and the spacing between the plurality of steel wires is the diameter (d) of the steel wire. It may be 2 to 200 times that of .

A plurality of steel wires are arranged to be spaced apart in the composite material layer of the high-pressure gas storage container of the present invention to solve the above-described problem, and the spacing between the plurality of steel wires is the diameter (d) of the steel wire. It may be 2 to 50 times of .

The diameter of the steel wire of the high-pressure gas storage container of the present invention to solve the above-described problem may be 0.05 mm to 0.25 mm.

The composite material layer of the high-pressure gas storage container of the present invention to solve the above-mentioned problems is any one of a Zn plating layer, a Zn-Al plating layer, a Zn-Al-Mg plating layer, a Cu-Zn plating layer, and a Cu-Zn-Co plating layer. It can be plated above.

The high-pressure gas storage container manufacturing method of the present invention to solve the above-mentioned problems includes a resin impregnation step of passing a plurality of fibers through a resin impregnation tank and impregnating the fibers with a resin; A fiber supply step of supplying a plurality of resin-impregnated fibers to a traverse device; A steel wire supply step of supplying a plurality of steel wires to a traverse device; An arranging step of arranging and contacting the plurality of steel wires on top of the plurality of resin-impregnated fibers through an arrangement unit provided in the traverse device; A bonding step of winding the plurality of fibers and the plurality of steel wires around a liner having a storage space therein, and bonding the composite material layer including the fibers, the steel wires, and the resin to the liner. It is characterized by:

The traverse device of the high-pressure gas storage container manufacturing method of the present invention to solve the above-described problem includes a first guide portion provided with a plurality of first guide bars to prevent the fiber from being twisted, and a first guide portion to prevent the steel wire from being twisted. and a second guide portion provided with a plurality of second guide bars, wherein the plurality of resin-impregnated fibers pass between the plurality of first guide bars, and the plurality of steel wires are connected to the plurality of second guide bars. Passing through the space, the plurality of resin-impregnated fibers and the plurality of steel wires may be supplied to the array unit from different directions.

The traverse device of the high-pressure gas storage container manufacturing method of the present invention to solve the above-described problem may be capable of sliding in a direction parallel to the central axis of the liner.

The traverse device of the high-pressure gas storage container manufacturing method of the present invention to solve the above-described problem includes a gap maintaining portion provided with a plurality of holes spaced apart at specified intervals, and the plurality of steel wires are connected to the gap maintaining portion. It may be supplied to the array unit through the hole.

In the high-pressure gas storage container manufacturing method of the present invention to solve the above-described problem, the spacing between the plurality of holes provided in the spacing maintenance part may be 2 to 50 times the diameter (d) of the steel wire.

In the method of manufacturing a high-pressure gas storage container of the present invention to solve the above-described problem, the spacing between the plurality of holes provided in the spacing maintenance part may be 2 to 200 times the diameter (d) of the steel wire.

The plurality of fibers and the plurality of steel wires in the high-pressure gas storage container manufacturing method of the present invention to solve the above-mentioned problems are horizontally (hoop direction) or diagonally (helical direction) with respect to the central axis of the liner. It can be wound.

The liner of the high-pressure gas storage container manufacturing method of the present invention to solve the above-described problem rotates about the central axis, and the plurality of fibers and the plurality of steel wires are wound around the liner, and the plurality of fibers and the plurality of steel wires are wound around the liner. When the steel wire is wound around the liner, the internal pressure of the liner may be 1 to 5 (bar).

In order to solve the above-described problems, the plurality of steel wires wound around the liner of the high-pressure gas storage container manufacturing method of the present invention may form a network structure.

The volume ratio occupied by the steel wire in the composite material layer of the high-pressure gas storage container manufacturing method of the present invention to solve the above-mentioned problems may be 3 to 50 vol %.

The resin of the high-pressure gas storage container manufacturing method of the present invention to solve the above-mentioned problems includes at least one of epoxy resin and acrylic resin, and the fiber is carbon fiber, glass fiber, basalt fiber, and aramid fiber. , may include any one or more of dyneema fibers.

The diameter of the steel wire in the high-pressure gas storage container manufacturing method of the present invention to solve the above-mentioned problems may be 0.05 mm to 0.25 mm.

The present invention relates to a high-pressure gas storage container and a method of manufacturing a high-pressure gas storage container, using a composite material layer containing steel wire, fiber, and resin, and forming the steel wire of the composite material layer into a network structure to improve durability and shear strength. There is an advantage in producing a high-pressure gas storage container with excellent strength and excellent impact toughness.

In addition, the present invention has the advantage of excellent resistance to bending stress or impact stress by forming a volume ratio of 3 to 50 vol % of the steel wire in the composite material layer.

In addition, the present invention has the advantage of reducing manufacturing costs while improving durability and impact toughness by reducing the volume ratio of expensive carbon fiber and improving the volume ratio of steel wire.

1 is a diagram showing a liner and a composite material layer according to an embodiment of the present invention.

Figures 2(a) and 2(b) are diagrams showing a network structure formed with a plurality of steel wires 150 by winding a plurality of steel wires around a liner several times according to an embodiment of the present invention. .

Figure 3 is a flowchart of a method for manufacturing a high-pressure gas storage container according to an embodiment of the present invention.

Figure 4 is a diagram showing the manufacturing process of a high-pressure gas storage container according to an embodiment of the present invention.

Figure 5 is an enlarged view of part 'A' of Figure 4.

Figure 6 is a diagram showing a steel wire being wound around a liner while being embedded in a plurality of fibers according to an embodiment of the present invention.

Hereinafter, various embodiments of the present invention are described in conjunction with the accompanying drawings. Various embodiments of the present invention can be modified and have various embodiments, and specific embodiments are illustrated in the drawings and related detailed descriptions are provided. However, this is not intended to limit the various embodiments of the present invention to specific embodiments, and should be understood to include all changes and/or equivalents or substitutes included in the spirit and technical scope of the various embodiments of the present invention. In connection with the description of the drawings, similar reference numbers have been used for similar components.

Expressions such as “includes” or “may include” that may be used in various embodiments of the present invention refer to the existence of the corresponding function, operation, or component that has been disclosed, and one or more additional functions, operations, or components. There are no restrictions on components, etc. In addition, in various embodiments of the present invention, terms such as "comprise" or "have" are intended to indicate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification. It should be understood that this does not exclude in advance the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

Terms used in various embodiments of the present invention are merely used to describe specific embodiments and are not intended to limit the various embodiments of the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the technical field to which various embodiments of the present invention pertain.

The present invention relates to a high-pressure gas storage container and a method of manufacturing a high-pressure gas storage container, using a composite material layer containing steel wire, fiber, and resin, and forming the steel wire of the composite material layer into a network structure to improve durability and shear strength. It relates to a high-pressure gas storage container having excellent strength and excellent impact toughness and a method of manufacturing the same.

The high-pressure gas storage container according to an embodiment of the present invention may be a hydrogen storage tank. However, it is not limited to this, and the high-pressure gas storage container according to an embodiment of the present invention may be a variety of gas storage tanks that require durability against high pressure. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

Referring to FIG. 1, a high-pressure gas storage container according to an embodiment of the present invention includes a liner 110 and a composite material layer 120.

The liner 110 is provided with a storage space 111 therein. High-pressure gas may be stored in the storage space 111, and the liner 110 may be a member provided outside the storage space 111 and surrounding the storage space 111.

The liner 110 may be made of aluminum, engineering plastic, polyamide plastic, etc., and the liner 110 is provided on the outside of the storage space 111 and stores high pressure in the storage space 111. It can be made of various members as long as it can withstand the pressure of gas.

A fuel inlet 112 and a fuel outlet 113 may be provided on one side and the other side of the liner 110. Gas may flow into or out of the storage space 111 through the fuel inlet 112 and the fuel outlet 113 provided in the liner 110.

The composite material layer 120 is coupled to the liner 110. The composite material layer 120 may be a reinforcing material layer coupled to the outside of the liner 110, and the composite material layer 120 includes resin 130, fiber 140, and steel wire 150.

According to an embodiment of the present invention, after impregnating the plurality of fibers 140 with the resin 130 and arranging and contacting the plurality of steel wires 150 on top of the plurality of fibers 140, The composite material layer 120 may be coupled to the liner 110 by wrapping the plurality of fibers 140 and the plurality of steel wires 150 around the liner 110 .

According to an embodiment of the present invention, the resin 130 may include any one or more of epoxy resin and acrylic resin, and the fiber 140 may include carbon fiber, glass fiber, basalt fiber, and aramid fiber. , may include any one or more of dyneema fibers.

Specifically, the resin 130 may be made of Elium acrylic resin, a thermoplastic resin, and epoxy resin, a thermosetting resin, and the fiber 140 may be carbon fiber, glass fiber, basalt fiber, aramid fiber, or dyneema. It may be made of fiber, etc.

However, the resin 130 and the fiber 140 are not limited to this, and the resin 130 may be made of various resins as long as it is in liquid form and can be impregnated into the fiber 140. (140) Various fibers may also be used.

The fiber 140 may have a thread-like shape, and the fiber 140 may have a small diameter of 1 μm to 50 μm. A plurality of small diameter fibers 140 (1000 to 24,000 strands) are gathered to form a fiber roving, and when the fiber roving is passed through a resin impregnation tank 210 containing the resin 130 in a liquid state, The resin 130 is impregnated between the plurality of fibers 140.

When the resin 130 is impregnated between the plurality of fibers 140 and the plurality of fibers 140 are aggregated, the plurality of steel wires 150 are contacted and arranged on top of the plurality of fibers 140. . At this time, the plurality of steel wires 150 are arranged on top of the plurality of fibers 140 while being spaced apart at designated intervals.

After arranging and contacting the plurality of steel wires 150 on top of the plurality of fibers 140, the plurality of fibers 140 and the plurality of steel wires 150 are wound around the liner 110. The composite material layer 120 can be coupled to the liner 110.

According to an embodiment of the present invention, the plurality of steel wires 150 wound around the liner 110 may form a network structure. Referring to FIGS. 1, 2(a), and 2(b), the plurality of fibers 140 and the plurality of steel wires 150 are aligned with the central axis 114 of the liner 110, It may be wound around the liner 110 in a horizontal direction (hoop direction) or diagonal direction (helical direction).

Specifically, the plurality of fibers 140 and the plurality of steel wires 150 are wound several times in the horizontal direction (hoop direction) or diagonal direction (helical direction) with respect to the central axis 114 of the liner 110. When this happens, the plurality of steel wires 150 wound around the liner 110 form a network structure, as shown in FIGS. 1, 2(a), and 2(b).

More specifically, the plurality of steel wires 150 wound around the liner 110 have a multi-layer structure and form a network structure.

In this way, the plurality of steel wires 150 are wound several times in the horizontal direction (hoop direction) or diagonal direction (helical direction) with respect to the central axis 114 of the liner 110 to form the plurality of steel wires 150. By forming a network structure, it is possible to disperse the stress occurring in the high-pressure gas storage container and improve the durability of the high-pressure gas storage container.

According to an embodiment of the present invention, the liner 110 may rotate about the central axis 114 while the plurality of fibers 140 and the plurality of steel wires 150 may be wound around the liner. Specifically, as the liner 110 rotates and pulls the fiber 140 and the steel wire 150, the fiber 140 and the steel wire 150 are wound around the liner 110. You can.

When the plurality of fibers 140 and the plurality of steel wires 150 are wound around the liner, the internal pressure of the liner 110 may be 1 to 5 (bar). When the fiber 140 and the steel wire 150 are wound around the liner 110, the force of the fiber 140 and the steel wire 150 pressing the liner 110 causes the liner ( 110), deformation may occur.

To prevent this, it is desirable to maintain the internal pressure of the liner 110 at 1 to 5 (bar). Specifically, it is desirable to maintain the pressure of the storage space 111 provided inside the liner 110 at 1 to 5 (bar).

According to an embodiment of the present invention, in order to strongly adhesively bond the steel wire 150, the resin 130, and the fiber 140 to each other, an adhesion promoter is applied to the surface of the steel wire 150 or the resin ( 130) may contain an adhesion promoter.

The adhesion between the steel wire 150, the resin 130, and the fiber 140 can greatly affect the durability of the high-pressure gas storage container, and the adhesion between the steel wire 150, the resin 130, and the fiber 140 can greatly affect the durability of the high-pressure gas storage container. As the adhesive force of (140) increases, the breaking strength of the high-pressure gas storage container may increase.

The adhesion promoter may be a primer, Chemlok, or silane, but is not limited thereto, and may be used as a various adhesion promoter if it can improve the adhesion between the steel wire 150, the resin 130, and the fiber 140. can be used.

Additionally, when the fiber 140 is carbon fiber, the surface of the steel wire 150 may be surface treated to prevent galvanic corrosion between the carbon fiber and the steel wire 150. Specifically, the surface of the steel wire 150 can be treated with DLC (Diamond like carbon) coating to suppress ion movement, thereby preventing galvanic corrosion between the carbon fiber and the steel wire 150. It can be prevented.

According to an embodiment of the present invention, the volume ratio occupied by the steel wire 150 in the composite material layer 120 may be 3 to 50 vol %. If the volume ratio occupied by the steel wire 150 in the composite material layer 120 is less than 3 vol %, the steel wire 150 is insufficient and a network structure is formed through the steel wire 150. Can be difficult to form.

If the volume ratio occupied by the steel wire 150 in the composite material layer 120 is greater than 50 vol %, the weight of the high-pressure gas storage container may be too heavy and the weight reduction effect may be lost. Therefore, it is preferable that the volume ratio occupied by the steel wire 150 in the composite material layer 120 is 3 to 50 vol %.

Additionally, according to an embodiment of the present invention, the volume ratio occupied by the steel wire 150 in the composite material layer 120 may be 3 to 10 vol %. When the high-pressure gas storage container according to an embodiment of the present invention is used for a hydrogen vehicle, the volume ratio occupied by the steel wire 150 in the composite material layer 120 is 3 to 10 vol % in order to reduce the weight of the high-pressure gas storage container. It is desirable.

Additionally, according to an embodiment of the present invention, the volume ratio occupied by the steel wire 150 in the composite material layer 120 may be 10 to 50 vol %. When the high-pressure gas storage container according to the embodiment of the present invention is used for hydrogen transportation and charging stations, the volume ratio occupied by the steel wire 150 in the composite material layer 120 is 10 to 50 vol % to improve durability. desirable.

In addition, when the high-pressure gas storage container according to an embodiment of the present invention is used for a charging station, the volume ratio occupied by the steel wire 150 in the composite material layer 120 may be 50 to 80 vol %. When the high-pressure gas storage container is used for a charging station, since weight reduction is not greatly required, the volume ratio occupied by the steel wire 150 in the composite material layer 120 may be 50 to 80 vol %.

According to an embodiment of the present invention, a plurality of the steel wires 150 are arranged to be spaced apart in the composite material layer 120, and the spacing between the plurality of steel wires 150 is equal to the distance between the steel wires 150. It may be 2 to 200 times the diameter (d) of.

As described above, when the plurality of steel wires 150 are contacted and arranged on top of the plurality of fibers 140, the plurality of steel wires 150 are spaced apart at designated intervals and the plurality of fibers 140 It can be arranged at the top of .

At this time, the plurality of fibers 140 may be in contact with each other without being spaced apart from each other. More specifically, a plurality of small diameter fibers 140 (1000 to 24,000 strands) are gathered to form a fiber roving, and the plurality of fiber rovings thus formed contain the resin 130 in a liquid state. It passes through the resin impregnation tank 210.

The plurality of fiber rovings may be in contact with each other before being wound around the liner 110, and the plurality of steel wires 150 may be in contact with and arranged on top of the plurality of fiber rovings in contact with each other while being spaced apart at designated intervals. .

According to an embodiment of the present invention, when the plurality of steel wires 150 are contacted and arranged on the upper part of the plurality of fiber rovings in contact with each other, the steel wire 150 presses the fiber 140 The steel wire 150 may be buried in a plurality of the fibers 140. More specifically, the lower 50% of the steel wire 150 may be buried in the plurality of fibers 140.

When the steel wires 150 are spaced apart and disposed on the upper part of the fiber 140, the spacing between the plurality of steel wires 150 is between twice the diameter d of the steel wire 150. It may be 200 times, preferably 2 to 50 times.

If the spacing between the plurality of steel wires 150 is too small (less than twice the diameter d of the steel wires 150), the steel wires 150 are tightly arranged and form a high-pressure gas storage container. If the weight is too heavy, the effect of lightweighting may be lost.

Additionally, if the spacing between the plurality of steel wires 150 is too wide, the effect of the network structure may be reduced. Therefore, when the steel wires 150 are spaced apart and arranged on the upper part of the fiber 140, the spacing between the plurality of steel wires 150 is twice the diameter (d) of the steel wire 150. It may be from 200 times, preferably 2 to 50 times.

Here, depending on the purpose of the high-pressure gas storage container, the maximum spacing between the plurality of steel wires 150 (200 or 50 times the diameter d of the steel wire 150) may be changed.

In the case of a high-pressure gas storage container that requires high durability, the maximum spacing between the plurality of steel wires 150 may be 50 times or less than the diameter (d) of the steel wires 150, and requires high durability. In the case of a high-pressure gas storage container that is not used, the maximum spacing between the plurality of steel wires 150 may be 200 times or less than the diameter d of the steel wires 150.

According to an embodiment of the present invention, the diameter of the steel wire 150 may be 0.05 mm to 0.25 mm. When the diameter of the steel wire 150 is too large (larger than 0.25 mm), the voids inside the composite material layer 120 increase due to excessive thickness difference between the fiber roving and the steel wire 150. There is a problem in that the thickness of the composite material layer 120 increases.

Additionally, if the diameter of the steel wire 150 is too small (less than 0.05 mm), it is difficult to improve the durability of the high-pressure gas storage container. Therefore, the diameter of the steel wire 150 may be 0.05 mm to 0.25 mm.

More specifically, the diameter of the steel wire 150 may be less than 10 times the diameter of one fiber roving. In order to prevent excessive thickness difference between the fiber roving and the steel wire 150, the diameter of the steel wire 150 is preferably smaller than 10 times the diameter of one fiber roving. Additionally, the diameter of the steel wire 150 may be greater than twice the diameter of one fiber roving.

According to an embodiment of the present invention, the composite material layer 120 may be plated with any one or more of a Zn plating layer, a Zn-Al plating layer, a Zn-Al-Mg plating layer, a Cu-Zn plating layer, and a Cu-Zn-Co plating layer. there is. By plating the composite material layer 120 through the plating layer, corrosion resistance and strength can be improved.

Hereinafter, a method for manufacturing a high-pressure gas storage container according to an embodiment of the present invention will be described. Since the high-pressure gas storage container manufactured through the high-pressure gas storage container manufacturing method according to the embodiment of the present invention may be the same as the high-pressure gas storage container according to the above-described embodiment of the present invention, detailed description thereof will be omitted.

The high-pressure gas storage vessel manufacturing method according to an embodiment of the present invention manufactures the composite material layer 120 including the resin 130, the fiber 140, and the steel wire 150, and the composite material layer It includes a method of coupling (120) to the liner (110).

Referring to Figure 3, the method of manufacturing a high-pressure gas storage container according to an embodiment of the present invention includes a resin impregnation step (S110), a fiber supply step (S120), a steel wire supply step (S130), an arrangement step (S140), and combining. Includes step S150.

Referring to Figures 3 and 4, the resin impregnation step (S110) is a step of passing a plurality of the fibers 140 through a resin impregnation tank 210 and impregnating the fibers 140 with the resin 130. am.

The fiber supply step (S120) is a step of supplying the plurality of fibers 140 impregnated with the resin 130 to the traverse device 220. In the fiber supply step (S120), a plurality of fiber rovings may be supplied to the traverse device 220. The steel wire supply step (S130) is a step of supplying a plurality of the steel wires 150 to the traverse device 220.

As will be described later, the plurality of fibers 140 and the plurality of steel wires 150 may be wound around the liner 110, and the plurality of fibers 140 and the plurality of steel wires 150 may be wrapped around the liner. (110) may be moved by a rotating force based on the central axis (114).

According to an embodiment of the present invention, in the fiber supply step (S120), a plurality of the fibers 140 may be supplied from the supply table to the arrangement unit 250. The supply base can apply tension to the plurality of fibers 140, and the supply base can apply tension of 1 to 3 kgf to the fibers 140.

In the arrangement step (S140), a plurality of steel wires 150 are placed on top of the plurality of fibers 140 impregnated with the resin 130 through the arrangement unit 250 provided in the traverse device 220. This is the stage of arrangement and contact.

The traverse device 220 according to an embodiment of the present invention arranges and contacts the steel wire 150 on the upper part of the fiber 140, and then connects the fiber 140 and the steel wire 150 to the liner. This is a device that can supply to the outside of (110).

The arrangement unit 250 of the traverse device 220 is a device that can bring the steel wire 150 into contact with the upper part of the fiber 140, and is positioned at the lower part of the arrangement unit 250, which is formed in a bar shape. As the fiber 140 and the steel wire 150 pass, the steel wire 150 is pressed by the array unit 250, allowing the steel wire 150 to always be in contact with the fiber 140.

According to an embodiment of the present invention, the traverse device 220 further includes a first guide part 230 and a second guide part 240. The first guide part 230 is provided with a plurality of first guide bars 231 to prevent the fiber 140 from being twisted.

The plurality of fibers 140 impregnated with the resin 130 may pass between the plurality of first guide bars 231 and be supplied to the array unit 250. More specifically, the first guide part 230 is used to prevent the plurality of fiber rovings from twisting together, and the fiber roving can be supplied between the plurality of first guide bars 231.

The second guide part 240 is provided with a plurality of second guide bars 241 to prevent the steel wire 150 from being twisted. The plurality of steel wires 150 may pass between the plurality of second guide bars 241 and be supplied to the array unit 250.

According to an embodiment of the present invention, the plurality of fibers 140 and the plurality of steel wires 150 impregnated with the resin 130 may be supplied to the array unit 250 from different directions.

Specifically, the plurality of fibers 140 and the plurality of steel wires 150 impregnated with the resin 130 are separated from each other and supplied to the arrangement unit 250, and then contact the arrangement unit 250. It can be done. At this time, the steel wire 150 may be supplied to the array unit 250 from the top of the fiber 140.

The plurality of fibers 140 and the plurality of steel wires 150 impregnated with the resin 130 supplied to the arrangement unit 250 pass through the lower part of the arrangement unit 250. While passing the fiber 140 and the steel wire 150 through the lower part of the bar-shaped arrangement unit 250, the steel wire 150 is pressed by the arrangement unit 250, thereby forming the steel wire 150. ) can be brought into contact with the fiber 140.

Referring to FIGS. 4 and 5 , the traverse device 220 includes a gap maintaining portion 260 provided with a plurality of holes 261 spaced apart at a designated interval. As described above, the plurality of steel wires 150 are spaced apart at designated intervals and are in contact with and arranged on top of the plurality of fibers 140 impregnated with the resin 130.

The spacing maintaining part 260 is provided to maintain the spacing between the plurality of steel wires 150, and the plurality of steel wires 150 pass through the hole 261 of the spacing maintaining part 260. Thus, it can be supplied to the array unit 250.

As the plurality of steel wires 150 are passed through the plurality of holes 261 spaced apart at designated intervals, the plurality of steel wires 150 are impregnated with the resin 130 while being spaced apart at designated intervals. It is possible to contact and arrange the steel wire 150 on the upper part of the fiber 140.

According to an embodiment of the present invention, the spacing between the plurality of holes 261 provided in the spacing maintaining part 260 may be 2 to 200 times the diameter d of the steel wire 150, The spacing between the plurality of holes 261 provided in the spacing maintaining part 260 may be 2 to 50 times the diameter d of the steel wire 150.

The spacing between the plurality of holes 261 provided in the spacing maintaining part 260 may be the same as the spacing between the steel wires 150 . Since the range of the spacing between the steel wires 150 has been described in the above description, a detailed description of the spacing between the plurality of holes 261 provided in the spacing maintaining part 260 will be omitted.

At this time, referring to FIG. 6, the plurality of fibers 140 may be in contact with each other without being spaced apart from each other. More specifically, a plurality of small diameter fibers 140 (1000 to 24,000 strands) are gathered to form a fiber roving, and the plurality of fiber rovings thus formed contain the resin 130 in a liquid state. It passes through the resin impregnation tank 210.

The plurality of fiber rovings may be in contact with each other before being wound around the liner 110, and as shown in FIG. 6, the plurality of steel wires 150 may be spaced apart at designated intervals on top of the plurality of fiber rovings in contact with each other and may contact and can be arranged.

Referring to FIG. 6, when the plurality of steel wires 150 are contacted and arranged on top of the plurality of fiber rovings in contact with each other, the steel wire 150 presses the fiber 140 (150) may be buried in a plurality of the fibers (140).

More specifically, the lower 50% of the steel wire 150 may be buried in the plurality of fibers 140. As the steel wire 150 is buried in the plurality of fibers 140, the adhesive force between the steel wire 150 and the fiber 140 becomes stronger, thereby improving the durability of the high-pressure gas storage container.

In the combining step (S150), the plurality of fibers 140 and the plurality of steel wires 150 are wound around the liner 110 to form the fibers 140, the steel wires 150, and the resin 130. This is a step of combining a composite material layer 120 containing a to the liner 110.

In the combining step (S150), the plurality of fibers 140 and the plurality of steel wires 150 are moved in a horizontal direction (hoop direction) or a diagonal direction (helical direction) with respect to the central axis 114 of the liner 110. direction) can be wound.

In the coupling step (S150), the liner 110 may rotate about the central axis 114. When the liner 110 is rotated while supplying the plurality of fibers 140 and the plurality of steel wires 150 through the traverse device 220, the plurality of fibers 140 and the plurality of steel wires ( 150) can be wound around the liner 110.

According to an embodiment of the present invention, the plurality of fibers 140 and the plurality of steel wires 150 are connected to the array portion 250 by the force of the liner 110 rotating about the central axis 114. -Can be supplied to the liner 110.

Specifically, when the liner 110 rotates about the central axis 114 and winds the plurality of fibers 140 and the plurality of steel wires 150, the fibers 140 pass through the liner 110. ) and the steel wire 150 can be pulled.

The plurality of fibers 140 and the plurality of steel wires 150 are connected to the array portion 250 by a force that pulls the fibers 140 and the steel wires 150 while the liner 110 rotates. It can be supplied to the liner 110.

According to an embodiment of the present invention, the plurality of steel wires 150 wound around the liner 110 may form a network structure. Referring to FIGS. 1, 2(a), and 2(b), the plurality of fibers 140 and the plurality of steel wires 150 are aligned with the central axis 114 of the liner 110, It can be wound horizontally (hoop direction) or diagonally (helical direction).

Specifically, the plurality of fibers 140 and the plurality of steel wires 150 are wound several times in the horizontal direction (hoop direction) or diagonal direction (helical direction) with respect to the central axis 114 of the liner 110. You can.

In this way, when the plurality of fibers 140 and the plurality of steel wires 150 are wound around the liner 110 several times in a horizontal or diagonal direction, FIGS. 1, 2(a), and 2(b) Likewise, the plurality of steel wires 150 wound around the liner 110 form a network structure.

According to an embodiment of the present invention, the traverse device 220 may be capable of sliding in a direction parallel to the central axis 114 of the liner 110. As described above, the plurality of fibers 140 and the plurality of steel wires 150 are wound around the liner 110 several times in a horizontal or diagonal direction.

When winding the fiber 140 and the steel wire 150 around the liner 110, the traverse device is used to wind the fiber 140 and the steel wire 150 in a diagonal direction around the liner 110. (220) may be slideable in a direction parallel to the central axis 114 of the liner 110.

More specifically, when the liner 110 rotates about the central axis 114 and the traverse device 220 slides in a direction parallel to the central axis 114 of the liner 110, the fiber 140 and the steel wire 150 can be wound in a diagonal direction with respect to the central axis 114 of the liner 110.

Here, the fiber 140 and the steel wire 150 are supplied to the liner 110 in a state in which the traverse device 220 is not slidably moved in a direction parallel to the central axis 114 of the liner 110. Then, the fiber 140 and the steel wire 150 can be wound around the liner 110 in a horizontal direction.

The method of manufacturing a high-pressure gas storage container according to an embodiment of the present invention may further include a curing step (S160). The curing step (S160) is a step of curing the plurality of fibers 140 and the plurality of steel wires 150 wound around the liner 110.

According to an embodiment of the present invention, when the resin 130 is made of an epoxy resin, the plurality of fibers 140 and the plurality of steel wires 150 can be hardened through heating.

Additionally, when the resin 130 is made of an acrylic resin, the plurality of fibers 140 and the plurality of steel wires 150 can be cured by irradiating ultraviolet rays through the UV curing device 270.

According to an embodiment of the present invention, the volume ratio occupied by the steel wire 150 in the composite material layer 120 including the resin 130, the fiber 140, and the steel wire 150 is 3 to 3. It may be 50vol%.

In addition, according to an embodiment of the present invention, the volume ratio occupied by the steel wire 150 in the composite material layer 120 including the resin 130, the fiber 140, and the steel wire 150 is It may be 3 to 10 vol % or 10 to 50 vol %. Alternatively, the volume ratio occupied by the steel wire 150 in the composite material layer 120 may be 50 to 80 vol %.

The resin 130 according to an embodiment of the present invention includes any one or more of epoxy resin and acrylic resin, and the fiber 140 includes any one of carbon fiber, glass fiber, Basalt fiber, aramid fiber, and dyneema fiber. It may contain more than one.

The diameter of the steel wire 150 according to an embodiment of the present invention may be 0.05 mm to 0.25 mm, and the diameter of the steel wire 150 may be 2 to 10 times the diameter of the fiber roving.

The high-pressure gas storage container and the manufacturing method of the high-pressure gas storage container according to the embodiment of the present invention described above have the following effects.

The high-pressure gas storage container and the manufacturing method of the high-pressure gas storage container according to the embodiment of the present invention described above use a composite material layer containing steel wire, fiber, and resin, and the steel wire of the composite material layer is formed into a network structure. There is an advantage in producing a high-pressure gas storage container that has excellent durability and shear strength as well as excellent impact toughness.

In addition, the high-pressure gas storage container and the method of manufacturing the high-pressure gas storage container according to an embodiment of the present invention have the advantage of improving the breaking strength of the storage container by using a composite material layer containing steel wire, fiber, and resin. .

Above, the present invention has been described in detail with preferred embodiments, but the present invention is not limited to the above embodiments, and various modifications may be made without departing from the scope of the present invention. Therefore, the true scope of technical protection of the present invention should be determined by the technical spirit of the appended claims.

Claims

In a container storing high-pressure gas,

Liner with storage space inside;

Including a composite material layer coupled to the liner,

The composite material layer includes resin, fiber, and steel wire,

Impregnating a plurality of the fibers with the resin,

After the plurality of steel wires are buried, arranged and contacted on top of the plurality of fibers, the plurality of fibers and the plurality of steel wires are wound around the liner to couple the composite material layer to the liner,

The steel wire is adhesively bonded to the resin while buried in the plurality of fibers,

A high-pressure gas storage container, wherein the plurality of steel wires wound around the liner form a network structure.
According to paragraph 1,

A high-pressure gas storage container, characterized in that the volume ratio occupied by the steel wire in the composite material layer is 3 to 50 vol %.
According to paragraph 1,

A high-pressure gas storage container, characterized in that the volume ratio occupied by the steel wire in the composite material layer is 50 to 80 vol %.
According to paragraph 1,

The fiber is a high-pressure gas storage container, characterized in that it includes any one or more of carbon fiber, glass fiber, basalt fiber, aramid fiber, and dyneema fiber.
According to paragraph 1,

A plurality of steel wires are spaced apart from each other in the composite material layer,

A high-pressure gas storage container, characterized in that the spacing between the plurality of steel wires is 2 to 200 times the diameter (d) of the steel wire.
According to paragraph 1,

A plurality of steel wires are spaced apart from each other in the composite material layer,

A high-pressure gas storage container, characterized in that the spacing between the plurality of steel wires is 2 to 50 times the diameter (d) of the steel wire.
According to paragraph 1,

A high-pressure gas storage container, characterized in that the diameter of the steel wire is 0.05mm to 0.25mm.
According to paragraph 1,

The composite material layer is,

A high-pressure gas storage container characterized in that it is plated with one or more of a Zn plating layer, a Zn-Al plating layer, a Zn-Al-Mg plating layer, a Cu-Zn plating layer, and a Cu-Zn-Co plating layer.
In a method of manufacturing a container for storing high-pressure gas,

A resin impregnation step of passing a plurality of fibers through a resin impregnation tank to impregnate the fibers with a resin;

A fiber supply step of supplying a plurality of resin-impregnated fibers to a traverse device;

A steel wire supply step of supplying a plurality of steel wires to a traverse device;

An arranging step of arranging and contacting the plurality of steel wires while burying them on top of the plurality of resin-impregnated fibers through an arrangement unit provided in the traverse device;

A bonding step of winding the plurality of fibers and the plurality of steel wires around a liner having a storage space therein, and bonding the composite material layer including the fibers, the steel wires, and the resin to the liner. And

The traverse device is,

A first guide portion provided with a plurality of first guide bars to prevent the fibers from being twisted,

It includes a second guide portion provided with a plurality of second guide bars to prevent the steel wire from being twisted,

The plurality of resin-impregnated fibers pass between the plurality of first guide bars, and the plurality of steel wires pass between the plurality of second guide bars,

The plurality of resin-impregnated fibers and the plurality of steel wires are supplied to the array unit from different directions,

The steel wire is fed to the array from the top of the fiber,

The steel wire is embedded in a plurality of the fibers,

The traverse device includes a gap maintenance portion provided with a plurality of holes spaced at designated intervals,

The plurality of steel wires are supplied to the array unit through the hole of the gap maintenance unit,

A method of manufacturing a high-pressure gas storage container, characterized in that the spacing between the plurality of holes provided in the spacing maintenance part is 2 to 50 times the diameter (d) of the steel wire.
According to clause 9,

A method of manufacturing a high-pressure gas storage container, wherein the traverse device is capable of sliding in a direction parallel to the central axis of the liner.
According to clause 9,

The plurality of fibers and the plurality of steel wires are,

A method of manufacturing a high-pressure gas storage container, characterized in that the liner is wound in a horizontal direction (hoop direction) or diagonal direction (helical direction) with respect to the central axis of the liner.
According to clause 11,

As the liner rotates about the central axis, the plurality of fibers and the plurality of steel wires are wound around the liner,

When the plurality of fibers and the plurality of steel wires are wound around the liner, the internal pressure of the liner is 1 to 5 (bar).
According to clause 11,

A method of manufacturing a high-pressure gas storage container, wherein the plurality of steel wires wound around the liner form a network structure.