KR102435705B1 - High pressure tank and method for manufacturing the high pressure tank - Google Patents

Abstract

A high pressure tank is disclosed. The high pressure tank has a liner; a carbon fiber layer in which carbon fibers are wound on the liner; and a basalt fiber layer in which basalt fibers are wound on the carbon fiber layer.

Description

High pressure tank and method for manufacturing the high pressure tank

The present invention relates to a high-pressure tank and a method for manufacturing the same, and more particularly, to a high-pressure tank having a carbon fiber layer and a basalt fiber layer, and a manufacturing method thereof.

Efforts to develop, produce, and sell hydrogen electric vehicles are accelerating at the domestic and overseas automobile industry levels due to fuel efficiency and application of greenhouse gas emission control standards. Composite material high-pressure tanks are fuel tanks that have been applied and used to contain natural gas and hydrogen containers in the automobile industry because of their advantages of long-time running and fast fuel charging. The importance of process speed is also increasing.

Carbon fiber is mainly used for hydrogen containers, and the biggest reason why carbon fiber is used is because of its high stiffness (120 GPa), strength, and breakage strain (average 1.7%). However, despite the increasing demand for carbon fiber, the price of carbon fiber is still maintained at $20/kg, which is a major factor in raising the price of hydrogen containers. In the case of hydrogen cars currently being sold, hydrogen containers account for 10% of the price of hydrogen cars.

The hydrogen container requires stability. Specifically, it must be able to withstand 700 bar in preparation for a car collision accident, and it is necessary to secure a safety factor of 2.25. And in the event of a car fire, it should be able to stay in the flame for more than 12 minutes.

In anticipation of the explosive demand for hydrogen containers due to the advent of the hydrogen economy era, the development of new hydrogen containers that can reduce manufacturing costs and secure stability at the same time is required.

The present invention provides a high-pressure tank capable of reducing manufacturing cost and securing stability at the same time, and a manufacturing method thereof.

The high-pressure tank according to the present invention includes a liner; a carbon fiber layer in which carbon fibers are wound on the liner; and a basalt fiber layer in which basalt fibers are wound on the carbon fiber layer.

In addition, the carbon fiber layer may include: a hoop winding layer in which the carbon fiber is hoop wound on the cylinder part of the liner; and a helical winding layer in which the carbon fiber is helically wound on the dome portion of the liner and the hoop winding layer.

In addition, the carbon fiber layer may include: a first hoop winding layer in which the carbon fiber is hoop-wound by a first number of turns on the cylinder portion of the liner; a first helical winding layer in which the carbon fiber is helically wound on the dome portion of the liner and the first hoop winding layer; a second hoop winding layer in which the carbon fiber is wound by a second number of turns on the first helical winding layer in a region overlapping the first hoop winding layer; and a second helical winding layer in which the carbon fibers are helically wound on the first helical winding layer and the second hoop winding layer in a region overlapping the first helical winding layer.

Also, the first number of turns may be different from the second number of turns.

In addition, the basalt fiber may be helically wound on the carbon fiber layer.

A method for manufacturing a high-pressure tank according to the present invention comprises the steps of winding a carbon fiber on a liner to form a carbon fiber layer; and winding the basalt fiber on the carbon fiber layer to form a basalt fiber layer.

In addition, the forming of the carbon fiber layer may include: hoop winding the carbon fiber on the cylinder part of the liner to form a hoop winding layer; and forming a helical winding layer by helically winding the carbon fiber on both sides of the liner on the dome portion and on the hoop winding side.

The forming of the carbon fiber layer may include: hoop winding the carbon fiber with a first number of turns to form a first hoop winding layer on the cylinder part of the liner; forming a first helical winding layer by helically winding the carbon fiber on the dome portion of the liner and the first hoop winding layer; forming a second hoop winding layer by hoop winding the carbon fiber to the first helical winding layer with a second number of turns different from the first number of turns in an area overlapping the first hoop winding layer; and forming a second helical winding layer by helically winding the carbon fibers on the first helical winding layer and the second hoop winding layer in a region overlapping the first helical winding layer.

According to the present invention, it is possible to reduce the manufacturing cost while maintaining the stability of the high-pressure tank by using a mixture of carbon fiber and basalt fiber.

In addition, according to the present invention, as the basalt fiber layer is formed on the outer side of the high-pressure tank, it can withstand the flame for a long time.

1 is a cross-sectional view showing a high-pressure tank according to an embodiment of the present invention.
2 is a cross-sectional view showing a high-pressure tank according to another embodiment of the present invention.
3 is a cross-sectional view showing a high-pressure tank according to another embodiment of the present invention.
4 is a view showing a fiber layer in a high-pressure tank according to an embodiment of the present invention.
5 is a view showing a fiber layer in a high-pressure tank according to a comparative example.
FIG. 6 is a graph of measuring strains appearing in each fiber layer in the high-pressure tank of FIG. 4 .
FIG. 7 is a graph of measuring strain appearing in the fiber layer of the high-pressure tank of FIG. 5 .
8 is a diagram schematically illustrating an apparatus for manufacturing a high-pressure tank according to an embodiment of the present invention.
9 is a view illustrating the high-pressure tank manufacturing apparatus of FIG. 8 as viewed from the front.
10 is a view showing a high-pressure tank manufacturing apparatus according to another embodiment of the present invention.
11 is a view showing an apparatus for manufacturing a high-pressure tank according to another embodiment of the present invention.
12 is a flowchart illustrating a method for manufacturing a high-pressure tank according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the technical spirit of the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosed content may be thorough and complete, and the spirit of the present invention may be sufficiently conveyed to those skilled in the art.

In this specification, when a component is referred to as being on another component, it may be directly formed on the other component or a third component may be interposed therebetween. In addition, in the drawings, the thicknesses of the films and regions are exaggerated for effective description of technical contents.

Also, in various embodiments of the present specification, terms such as first, second, third, etc. are used to describe various components, but these components should not be limited by these terms. These terms are only used to distinguish one component from another. Accordingly, what is referred to as a first component in one embodiment may be referred to as a second component in another embodiment. Each embodiment described and illustrated herein also includes a complementary embodiment thereof. In addition, in this specification, 'and/or' is used in the sense of including at least one of the elements listed before and after.

In the specification, the singular expression includes the plural expression unless the context clearly dictates otherwise. In addition, terms such as "comprise" or "have" are intended to designate that a feature, number, step, element, or a combination thereof described in the specification exists, and one or more other features, numbers, steps, or configurations It should not be construed as excluding the possibility of the presence or addition of elements or combinations thereof. In addition, in this specification, "connection" is used in a sense including both indirectly connecting a plurality of components and directly connecting a plurality of components.

In addition, in the following description of the present invention, if it is determined that a detailed description of a related well-known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

1 is a cross-sectional view showing a high-pressure tank according to an embodiment of the present invention.

Referring to FIG. 1 , the high-pressure tank 1000 may be used as a hydrogen storage tank for storing hydrogen. The high pressure tank 1000 includes a liner 1010 , a carbon fiber layer 1020 , and a basalt fiber layer 1030 .

The liner 1010 has a structure in which domes are connected to both sides of the cylinder part, and is provided with a metal or non-metal material. According to an example, the liner 1010 may be made of a high-density polyethylene (HDPE) material having low gas permeability.

The carbon fiber layer 1020 is formed by winding carbon fibers on the liner 1010 . Carbon fiber may be wound on the liner 1010 by helical winding or a combination of hoop winding and helical winding. According to the embodiment, in the hoop winding, the carbon fiber is wound on the cylinder portion of the liner 1010 in a 90° direction with respect to the central axis of the liner 1010, and the helical winding is 10° to the central axis of the liner 1010. Carbon fibers may be wound across both dome portions of the liner 1010 in the 80° direction.

The basalt fiber layer 1030 is formed by winding basalt fibers on the carbon fiber layer 1020 . The basalt fiber may be wound on the carbon fiber layer 1020 by a helical winding method. The basalt fiber layer 1030 is wound over the entire area of the carbon fiber layer 1020 , whereby external exposure of the carbon fiber layer 1020 may be blocked.

2 is a cross-sectional view showing a high-pressure tank according to another embodiment of the present invention.

Referring to FIG. 2 , the carbon fiber layer 1020 includes a hoop winding layer 1021 and a helical winding layer 1022 . The hoop winding layer 1021 is formed by hoop winding carbon fibers on the cylinder portion 1011 of the liner 1010, and the helical winding layer 1022 is formed of carbon fibers with dome portions 1012 and 1013 on both sides of the liner 1010 and It is formed by helical winding over the hoop winding layer 1021 . According to an embodiment, the hoop winding layer 1021 and the helical winding layer 1022 may be wound to have the same thickness. According to another embodiment, the hoop winding layer 1021 may be wound to a thickness greater than that of the helical winding layer 1022 .

The basalt fiber layer 1030 is formed by helically winding basalt fibers on the helical wine layer 1022 .

3 is a cross-sectional view showing a high-pressure tank according to another embodiment of the present invention.

The carbon fiber layer 1020 may be formed by alternately repeating the hoop winding layers 1021 and 1023 and the helical winding layers 1022 and 1024 . In the present embodiment, it is described that the hoop winding layers 1021 and 1023 and the helical winding layers 1022 and 1024 respectively form two layers, but the present embodiment is not limited thereto and the number of layers may be variously changed.

In the first hoop winding layer 1021 , carbon fibers are hoop-wound on the cylinder portion 1011 of the liner 1010 by the first number of turns. The first number of turns means the number of times the carbon fiber is wound around the entire area of the cylinder unit 1011 . The carbon fiber may be wound once over the entire area of the cylinder part 1011, in this case, the first number of turns becomes 1. The first number of turns may be provided in various numbers. According to an example, the first number of turns may be 3 to 4.

In the first helical winding layer 1022 , carbon fibers are helically wound on the dome portions 1012 and 1013 of the liner 1010 and the first hoop winding layer 1021 by the second number of turns. The second number of turns means the number of times the carbon fiber is wound around the entire area of the dome portions 1012 and 1013 and the first hoop winding layer 1021 . The second number of turns may be provided in various numbers.

In the area where the second hoop winding layer 1023 overlaps the first hoop winding layer 1021 , the carbon fiber is wound on the first helical winding layer 1022 with a third number of turns. The third number of turns means the number of times the carbon fiber is wound on the area overlapping the first hoop winding layer 1021 . The third number of turns may be the same as the first number of turns. In this case, the second hoop winding layer 1023 has the same thickness as the first hoop winding layer 1021 . Alternatively, the third number of turns may be smaller than the first number of turns. In this case, the second hoop winding layer 1023 has a thinner thickness than the first hoop winding layer 1021 .

The second helical winding layer 1024 is helically wound with the fourth number of turns on the first helical winding layer 1022 and the second hoop winding 1023 layer of carbon fiber in the region overlapping the first helical winding layer 1022. . The fourth number of turns means the number of times the carbon fiber is wound around the entire area of the first helical winding layer 1022 and the second hoop winding 1023 layer. The fourth number of turns may be the same as the second number of turns. In this case, the second helical winding layer 1024 has the same thickness as the first helical winding layer 1022 . Alternatively, the fourth number of turns may be smaller than the second number of turns. In this case, the second helical winding layer 1024 has a thinner thickness than the first helical winding layer 1022 .

In the high-pressure tank proposed in the present invention, all of the hoop windings are formed in the carbon fiber layer 1020 and only the helical windings are formed in the basalt fiber layer 1030, compared to the conventional high-pressure tank type in which the hoop winding and the helical winding are formed to correspond. There is an advantage in that it is possible to form a heterogeneous fibrous layer through a minimal fiber replacement operation.

As described above, the high-pressure tank 1000 according to embodiments of the present invention has a structure in which a carbon fiber layer 1020 and a basalt fiber layer 1030 are sequentially stacked on a liner 1010 .

4 is a view showing a fiber layer in a high-pressure tank according to an embodiment of the present invention, FIG. 5 is a view showing a fiber layer in a high-pressure tank according to a comparative example, and FIG. 6 is a strain rate shown in each fiber layer in the high-pressure tank of FIG. is a graph measuring the , and FIG. 7 is a graph measuring the strain rate appearing in the fiber layer of the high-pressure tank of FIG. 5 .

Referring to FIG. 4 , the high-pressure tank according to the present invention includes a hoop winding layer and a helical winding layer wound with carbon fiber, and an outermost helical winding layer wound with basalt fiber, as described with reference to FIG. 3 . On the other hand, referring to FIG. 5 , in the high-pressure tank according to the comparative example, the outermost helical winding layer is wound with carbon fiber instead of basalt fiber. Thereby, the high-pressure tank according to the comparative example is made of a single carbon fiber.

6 and 7 , it can be seen that the strain rate of fibers occurring in the helical winding layer is smaller than the strain rate of fibers occurring in the hoop winding layer. In the case of the comparative example, the strain rate of the fiber occurring in the helical winding layer is smaller than that of the embodiment of the present invention. However, the strain generated in the helical winding layer is lower than the fracture strain of carbon fiber and basalt fiber, and it can be confirmed that the stability of the high-pressure tank can be maintained even with mixed winding of carbon fiber and basalt fiber. In the high-pressure tank according to the comparative example, the strain occurring in the helical winding layer is significantly lower than the breaking strain of the carbon fiber, and the use of carbon fiber in the helical winding layer will correspond to excessive performance.

On the other hand, the price of basalt fiber is 1/10 of that of carbon fiber, and when manufacturing a high-pressure tank by mixing basalt fiber and carbon fiber as in the present invention, the manufacturing cost is significantly lower than when manufacturing a high-pressure tank using only carbon fiber. can save

And basalt fibers have a high melting point of about 1200 °C and are highly flame resistant. Therefore, the high-pressure tank of the present invention in which the basalt fiber layer is provided on the outermost side can be maintained in the flame longer than the high-pressure tank of the comparative example.

Hereinafter, an apparatus and method for manufacturing the high-pressure tank according to the present invention described above will be described. The high-pressure tank according to the present invention may be manufactured through a winding process using a general thermosetting resin and a post-treatment thermosetting process. According to another embodiment, the curing process is performed at the same time as the winding process by a process to be described later, so that it may be manufactured according to a simple manufacturing process in which the post-treatment process may be omitted.

8 is a diagram schematically illustrating an apparatus for manufacturing a high-pressure tank according to an embodiment of the present invention, and FIG. 9 is a diagram illustrating the apparatus for manufacturing a high-pressure tank of FIG. 8 as viewed from the front.

8 and 9 , the high-pressure tank manufacturing apparatus 10 manufactures the high-pressure tank by winding the fiber 30 on the liner 1010 . As the fiber 30, carbon fiber and basalt fiber are used.

The high-pressure tank manufacturing apparatus 10 includes a bobbin 110, transfer rollers 120 and 130, a resin container 140, a fiber direction control unit 150, a first ultraviolet irradiation unit 160, a liner support unit 170, and It includes a heater unit 180 .

A plurality of bobbins 110 are provided, and the fibers 30 are wound. The bobbin 110 is rotatably positioned on the support shelf 111 . According to the embodiment, the bobbin 110 is divided into two groups, and each group includes a plurality of bobbins 110 . The bobbin 110 included in the first group is provided with carbon fiber wound, and the bobbin 110 included in the second group is provided with basalt fiber wound around it.

The conveying rollers 120 and 130 are provided at a plurality of points in the section between the bobbin 110 and the liner support 170 . The conveying rollers 120 and 130 are positioned opposite each other in pairs, and the fiber 30 is conveyed between the pair of conveying rollers 120 and 130 . The transfer rollers 120 and 130 support the fibers 30 transferred from the bobbin 110 to the liner support 170 , and change the transfer direction of the fibers 30 .

The resin container 140 is positioned on the transport path of the fiber 30 , the upper surface is open, and the resin is provided therein. An impregnation roller 141 is rotatably provided inside the resin container 140 . The fiber 30 is impregnated in the resin by the impregnation roller 141 and then transferred.

The resin used in the embodiment of the present invention is a solution in which a base resin, a photoinitiator, and an organic peroxide are mixed.

According to an example, a thermoplastic resin is used as the base resin. An acrylic resin is used as the thermoplastic resin, and the acrylic resin may be selected from an acrylic monomer or a mixture of acrylic monomers, or an acrylic polymer. The acrylic monomer may be selected from acrylic acid, methacrylic acid, alkyl acrylic monomers, alkyl methacrylic monomers, hydroxyalkyl acrylic monomers and hydroxyalkyl methacrylic monomers. The mixture of acrylic monomers may be a mixture of two or more selected from the above acrylic monomers. The acrylic polymer may be selected from polyalkyl methacrylates or polyalkyl acrylates.

According to another example, a thermosetting resin is used as the base resin. As the thermosetting resin, an epoxy resin may be used. The thermosetting resin may be an epoxy resin containing tetraphenyl boron as an active ingredient, such as tetraphenylphosphonium tetraphenylborate and triethylammonium tetraphenylborate.

The photoinitiator reacts with light to cure the base resin. Photoinitiators are classified into Type I and Type II according to the generation mechanism of the active species. Type I photoinitiators absorb light and undergo direct photo-cleavage at the α or β-carbon position to form an initiating radical that causes polymerization. Type II photoinitiators generate radicals by hydrogen-abstraction from the surrounding environment, such as monomers or solvents. Type I photoinitiators include alkyl aryl ketones and α-hydroxy alkylphenones. The photoinitiator may be selected from Type I and Type II.

Organic peroxides are (-O-O-) organic compounds with very unstable peroxidation bonds in their molecular structure. They are highly reactive and combustible, and are thermally unstable substances that can undergo self-catalyzed decomposition. It causes thermal curing, and when curing begins, the viscosity rises rapidly. According to an embodiment, di-(4-tert-butylcyclohexyl)-peroxydicarbonate (BCHPC) may be used as the organic perproduct. BCHPC is in the form of a white fluid powder, and can be cured by reacting at about 40 to 110°C.

According to an embodiment, the photoinitiator may be contained in an amount of 0.1 to 10% by weight, and the organic peroxide may be contained in an amount of 0.1 to 10% by weight. Preferably, the photoinitiator is contained in an amount of 2 wt%, and the organic peroxide may be contained in an amount of 2 wt%.

The fiber direction control unit 150 is positioned between the resin container 140 and the liner support unit 170 , and a hole 151 through which the fiber 30 passes is formed. The fiber direction control unit 150 moves linearly along the guide shaft 152 , and the direction of the resin 30 wound on the liner 1010 may be adjusted according to the position of the fiber direction control unit 150 . With the adjustment of the fiber direction control unit 150 , the fiber 30 is a hoop winding in which the fiber 30 is wound close to 90° with respect to the circumferential direction of the liner 1010 , and a helical winding in which the fiber 30 is wound at 10 to 82° This is possible.

The first UV irradiation unit 160 is located in a section between the fiber direction control unit 150 and the liner support unit 170 , and irradiates UV rays to the fibers 30 transferred to the liner support unit 170 . According to an embodiment, the first ultraviolet ray irradiator 160 may be an LED device irradiating ultraviolet rays of a wavelength of 395 nm, and has an irradiation area of 30X300 nm and a maximum irradiation amount of 15W/cm ² . The resin impregnated in the fiber 30 is changed to a gel state by irradiation of ultraviolet rays.

The liner support 170 supports the liner 1010 and rotates the liner 1010 by driving a driving unit (not shown).

The heater unit 180 is positioned to be spaced apart from the liner 1010 by a predetermined distance, and provides heat toward the surfaces of the fiber layers 1020 and 1030 while the fiber is wound around the liner 1010 . The heater unit 180 may generate heat at a temperature of 65°C to 150°C.

When a thermoplastic resin is used as the base resin, the resin applied to the fiber 30 has increased fluidity by the heat transferred from the heater unit 180 . To improve the fluidity of the resin, the resin may be mixed between the fibers in the fiber layers 1020 and 1030 to improve the binding force of the fibers. In addition, after curing the fiber layers 1020 and 1030, if heat is applied again, the fluidity of the resin 30 is increased, so that the fiber 30 can be reused.

On the other hand, when a thermosetting resin is used as the base resin, the resin contained in the fiber layers 1020 and 1030 may be rapidly cured by the heat transferred from the heater unit 180 . In this case, since curing proceeds together with the winding of the fiber 30 , a separate heat treatment process is not required after the winding of the fiber 30 is completed, and thus the processing time can be shortened.

10 is a view showing a high-pressure tank manufacturing apparatus according to another embodiment of the present invention.

Referring to FIG. 10 , the high-pressure tank manufacturing apparatus further includes a temperature measuring unit 190 , a distance measuring unit 210 , a heater moving unit 220 , and a control unit 230 .

The temperature measuring unit 190 measures the surface temperature of the fiber layers 1020 and 1030 wound on the liner 1010 . The temperature measuring unit 190 may be a non-contact temperature measuring device.

The distance measuring unit 210 measures a distance between the surface of the fiber layers 1020 and 1030 wound on the liner 1010 . As the number of windings of the fiber 30 increases, the thickness of the fiber layers 1020 and 1030 becomes thicker.

The heater moving unit 220 moves the heater unit 180 to adjust the distance between the fiber layers 1020 and 1030 wound on the liner 1010 and the heater unit 180 .

The control unit 230 controls the heat generated by the heater unit 180 so that heat of a certain temperature is transferred to the fiber 30 wound on the liner 1010, and includes the heater unit 180 and the fiber layers 1020 and 1030. Adjust the distance between Specifically, when the surface temperature of the fiber layers 1020 and 1030 transmitted from the temperature measuring unit 190 exceeds a preset temperature range, the controller 230 controls the power 240 to apply it to the heater unit 180 . control the power In addition, when the surface temperature of the fiber layers 1020 and 1030 received from the temperature measuring unit 190 exceeds a preset temperature range, the controller 230 controls the heater moving unit 220 to connect the heater unit 180 and the heater unit 220 . The distance between the fiber layers 1020 and 1030 is adjusted.

11 is a view showing an apparatus for manufacturing a high-pressure tank according to another embodiment of the present invention.

Referring to FIG. 11 , the high-pressure manufacturing apparatus further includes a second ultraviolet ray irradiation unit 250 . The second ultraviolet irradiation unit 250 irradiates ultraviolet rays to the fiber layers 1020 and 1030 wound on the liner 1010 . The second ultraviolet irradiation unit 250 irradiates ultraviolet rays with a higher output than the first ultraviolet irradiation unit 160 . The ultraviolet ray irradiated from the second ultraviolet ray irradiation unit 250 cures the fiber layers 1020 and 1030 while the fiber 30 is wound on the liner 1010 . The fiber layers 1020 and 1030 may be cured with a high binding force by heat transferred from the heater unit 180 and ultraviolet rays transferred from the second ultraviolet irradiation unit 250 .

Hereinafter, a method for manufacturing the high-pressure tank using the above-described high-pressure tank device will be described.

12 is a flowchart illustrating a method for manufacturing a high-pressure tank according to an embodiment of the present invention.

Referring to FIG. 12 , the high-pressure tank manufacturing method includes a fiber transport step (S10), an ultraviolet irradiation step (S20), and a fiber winding step (S30).

In the fiber transfer step (S10), the fibers 30 wound around the bobbin 110 are released and transferred to the liner 1010 side. The fiber 30 is supported by the conveying rollers 120 and 130 disposed at a plurality of points, and is conveyed toward the liner 1010 while the conveying direction is changed. During the transfer process, the fibers 30 are impregnated with the resin contained in the resin container 140 .

In the ultraviolet irradiation step (S20), ultraviolet rays are irradiated to the fibers 30 impregnated in the resin in the process of transporting the fibers 30 . UV irradiation proceeds before the fibers 30 are wound on the liner 1010 . The resin impregnated in the fiber 30 is changed to a gel state by irradiation of ultraviolet rays.

In the fiber winding step ( S30 ), the fiber 40 irradiated with ultraviolet light is wound on the liner 1010 . In the fiber winding step (S30), the fiber 30 may be wound by any one of a hoop winding method and a helical winding method or a combination thereof.

According to an example, in the fiber winding step (S30), the carbon fiber layer 1020 is formed by winding the carbon fiber on the liner 1010, and the basalt fiber layer 1030 is formed by helically winding the basalt fiber on the carbon fiber layer 1020. forming a step.

According to another embodiment, the forming of the carbon fiber layer 1020 may include hoop winding carbon fibers on the cylinder part 1011 of the liner 1010 to form a hoop winding layer 1021 , and the liner 1010 . and forming a helical winding layer 1021 by helically winding carbon fibers on both sides of the dome portions 1012 and 1013 and the hoop winding layer 1021 .

According to another embodiment, the step of forming the carbon fiber layer 1020 may include hoop winding the carbon fiber on the cylinder part 1011 of the liner 1010 with the first number of turns to form the first hoop winding layer 1021 . Step, forming a first helical winding layer 1022 by helically winding carbon fibers on the dome portions 1012 and 1013 and the first hoop winding layer 1021 of the liner 1010, the first hoop winding layer 1021 Forming a second hoop winding layer 1023 by hoop winding carbon fibers on the first helical winding layer 1022 with a second number of turns different from the first number of turns in a region overlapping with the first number of turns, and a first helical winding layer 1022 ) and forming a second helical winding layer 1024 by helically winding the carbon fibers on the first helical winding layer 1022 and the second hoop winding layer 1023 in an overlapping region.

Meanwhile, in the fiber winding step ( S30 ), high-temperature heat from the heater unit 180 is irradiated toward the fiber layer while the fiber 30 is wound around the liner 1010 . The heater unit 180 may generate heat of 65°C to 150°C. Preferably, the heater unit 180 may generate heat of 85°C.

In the fiber winding step (S30), the surface temperature of the fiber layers 1020 and 1030 wound on the liner 1010 is measured through the temperature measuring unit 190, and when the surface temperature exceeds a preset temperature range, the controller 230 may control the power source 240 to adjust the temperature generated by the heater unit 180 .

In the fiber winding step (S30), the distance signal between the surface of the fiber layers 1020 and 1030 measured by the distance measuring unit 210 is transmitted to the control unit 230, and the control unit 230 is configured to control the fiber layer through the received signal. Calculate the thickness of (1020, 1030). When the surface temperature of the fiber layers 1020 and 1030 wound on the liner 1010 exceeds a preset temperature range, the controller 230 controls the heater moving unit 220 to control the heater unit 180 and the fiber layer 1020, 1030) and adjust the distance.

According to another embodiment, in the fiber winding step (S30), the second UV irradiation unit 250 irradiates UV rays to the fiber layers 1020 and 1030 wound on the liner 1010. The intensity of the ultraviolet ray irradiated from the second ultraviolet ray irradiator 250 is greater than the intensity of the ultraviolet ray irradiated from the first ultraviolet ray irradiator 160 . Ultraviolet rays irradiated from the second ultraviolet irradiation unit 250 may penetrate the fiber layers 1020 and 1030 with high output to rapidly harden the fiber layers 1020 and 1030 .

As mentioned above, although the present invention has been described in detail using preferred embodiments, the scope of the present invention is not limited to specific embodiments and should be construed according to the appended claims. In addition, those skilled in the art should understand that many modifications and variations are possible without departing from the scope of the present invention.

100: high pressure tank
1010: liner
1020: carbon fiber layer
1021, 1023: hoop winding layer
1022, 1024: helical winding layer
1030: basalt fiber layer

Claims (8)

liner;
a carbon fiber layer in which carbon fibers are wound on the liner; and
Including a basalt fiber layer in which basalt fibers are wound on the carbon fiber layer,
The carbon fiber layer,
a hoop winding layer in which the carbon fiber is hoop wound on the cylinder portion of the liner; and
and a helical winding layer in which the carbon fiber is helically wound on both sides of the dome of the liner and the hoop winding layer,
In the basalt fiber layer, the basalt fiber is helically wound over the entire area of the helical winding layer,
A high-pressure tank wherein the strain rate of fibers generated in the helical winding layer and the basalt fiber layer is lower than the strain rate of fibers generated in the hoop winding layer and lower than the fracture strain rate of the carbon fiber and the basalt fiber. delete The method of claim 1,
The carbon fiber layer,
a first hoop winding layer in which the carbon fiber is hoop-wound by a first number of turns on the cylinder portion of the liner;
a first helical winding layer in which the carbon fiber is helically wound on the dome portion of the liner and the first hoop winding layer;
a second hoop winding layer in which the carbon fiber is wound by a second number of turns on the first helical winding layer in a region overlapping the first hoop winding layer; and
and a second helical winding layer in which the carbon fiber is helically wound on the first helical winding layer and the second hoop winding layer in a region overlapping the first helical winding layer. 4. The method of claim 3,
The first number of turns is different from the number of second turns. The method of claim 1,
The high-pressure tank in which the carbon fiber and the basalt fiber are impregnated with a resin in which a thermoplastic resin, a photoinitiator, and an organic peroxide are mixed. winding carbon fibers on a liner to form a carbon fiber layer; and
Comprising the step of winding the basalt fiber on the carbon fiber layer to form a basalt fiber layer,
The step of forming the carbon fiber layer,
forming a hoop winding layer by hoop winding the carbon fiber on the cylinder part of the liner;
and forming a helical winding layer by helically winding the carbon fiber on both sides of the liner and on the hoop winding layer,
The step of forming the basalt fiber layer,
Helical winding the basalt fiber over the entire area of the helical winding layer,
The strain rate of fibers generated in the helical winding layer and the basalt fiber layer is smaller than the strain rate of fibers generated in the hoop winding layer and is lower than the fracture strain rate of the carbon fiber and the basalt fiber. 7. The method of claim 6,
The method for manufacturing a high-pressure tank in which the hoop winding layer and the helical winding layer are wound to have the same thickness. 7. The method of claim 6,
The step of forming the carbon fiber layer is
forming a first hoop winding layer by hoop winding the carbon fiber in a first number of turns on the cylinder portion of the liner;
forming a first helical winding layer by helically winding the carbon fiber on the dome portion of the liner and the first hoop winding layer;
forming a second hoop winding layer by hoop winding the carbon fiber to the first helical winding layer with a second number of turns different from the first number of turns in an area overlapping the first hoop winding layer; and
and forming a second helical winding layer by helically winding the carbon fiber on the first helical winding layer and the second hoop winding layer in a region overlapping the first helical winding layer.

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