KR102296328B1 - Flame Diffusion Prevention Fuel Tank And Flame Diffusion Prevention Material Manufacturing Method Therefor - Google Patents

Abstract

The present invention is to provide a flame diffusion prevention fuel tank, which can prevent in advance that a flame is propagated inside the fuel tank and causing great damage when a fire occurs outside the fuel tank, and a method for manufacturing a flame diffusion prevention material therefor. According to the present invention, the flame diffusion prevention fuel tank comprises: a fuel tank capable of accommodating fuel inside; at least one diffusion prevention unit located inside the fuel tank and provided to suppress the flow of the fuel; and a hatch which penetrates through an upper portion of the fuel tank and is provided so as to be able to open and close, so that the diffusion prevention unit can be stacked and loaded inside the fuel tank.

Description

Flame Diffusion Prevention Fuel Tank And Flame Diffusion Prevention Material Manufacturing Method Therefor

The present invention relates to a fuel tank for preventing flame spread that can prevent flames generated outside the fuel tank from spreading to the fuel tank, and a method for manufacturing a flame spread prevention material therefor, by suppressing the flow of fuel contained in the fuel tank, It relates to a fuel tank for preventing flame spread and a method for manufacturing a flame spread prevention material therefor, which can prevent volatilization, leakage, and leakage of fuel, thereby preventing flame propagation to the fuel tank containing fuel and causing great damage.

In general, a ship has propulsion by an engine that generates power by combustion of fuel, and as a fuel of the ship, heavy oil, MOD (Marine Diesel Oil), MFO (Marine Fuel Oil), LNG (Liquefied Natural Gas), LPG (Liquefied Petroleum Gas) and other fuels are being used.

Such a fuel tank typically includes a main body for storing fuel, a residual amount display device installed on the main body and detecting a residual amount of fuel, an injection unit for injecting fuel, a fuel discharge unit for supplying fuel to the engine, and the like.

Since fuel tanks store dangerous substances that can be exploded by external conditions such as heat, pressure, and impact, the issue of safety for fuel tanks has been treated as very important. It was intended to prevent accidents caused by explosions by installing safety valves, etc. in certain parts of the tank as well as the material and strength of the fuel tank itself.

However, in the conventional fuel tank, baffles are installed at regular intervals inside the fuel tank, so it only has the effect of calming the movement of the fluid during transportation, and the tank is protected from external impacts such as heat or pressure. No structures were installed to prevent or delay the explosion.

That is, there is no separate device or structure capable of preventing explosion inside the ship storage tank, so that when a fire occurs inside the ship, the fire spreads due to the storage tank and a major accident may occur.

Korean Patent Laid-Open Patent KR 10-2015-0032445 'Fuel gas transfer device for offshore structures' (2015.03.26)

The present invention has been devised to solve the above problems, and since it is possible to suppress the flow of fuel contained in the fuel tank, volatilization, leakage, and leakage of fuel are minimized to prevent a fire outside the fuel tank when a fire occurs. An object of the present invention is to provide a fuel tank for preventing flame spread that can prevent the flame from spreading inside and causing great damage in advance, and a method for manufacturing a flame spread prevention material for the same.

A fuel tank for preventing flame spread according to the present invention includes a fuel tank capable of accommodating a fuel therein, a diffusion preventing unit disposed inside the fuel tank, and at least one diffusion preventing unit provided to suppress the flow of the fuel, and the fuel tank. It is characterized in that it comprises a hatch which is formed through the upper portion and is provided so as to be able to open and close, so that the diffusion preventing unit can be stacked and loaded inside the fuel tank.

In more detail, the diffusion prevention unit is provided in the form of a roll wound around one side and in a direction perpendicular to the one side, the sheet having at least one hollow on the surface so that the fuel can be connected in communication. It is characterized in that it includes.

In more detail, flame spread prevention using a flame spread prevention material manufacturing apparatus including at least one pair of drums for winding a sheet-shaped flame spread prevention material and a plurality of cutters provided to cut the flame spread prevention material In the method of manufacturing a material, an unwinding step of unwinding a sheet provided in a roll shape while being wound on the take-up roll with a first drum disposed on one side of the pair of drums, after the unwinding step, the A slit forming step of manufacturing a slit forming sheet by forming at least one slit of a predetermined area in a sheet, in the slit forming sheet manufactured through the slit forming step, from a winding roll disposed on one side to a winding roll disposed on the other side A hollow forming step of forming a hollow forming sheet having at least one hollow formed thereon by applying a force in the same direction as that of the conveyed conveying direction to expand the area of the slit, and the hollow forming sheet manufactured through the slit forming step is applied to the other side It characterized in that it comprises a re-winding step of winding in the form of a roll through the arranged second drum.

According to the fuel tank for preventing flame spread of the present invention, as the tank for preventing flame spread includes a fuel tank and a diffusion prevention part and a hatch filled inside the fuel tank, when a fire occurs in a vehicle equipped with a fuel tank, the flow of fuel is reduced. Since it can be suppressed by the diffusion prevention part, volatilization or leakage of fuel and leakage can be minimized, so that it is possible to provide an effect of preventing in advance the flame from propagating inside the fuel tank and causing great damage.

In addition, as the diffusion prevention part is provided in the form of a rolled roll and includes a sheet having a hollow on the surface, fuel is filled between the hollows and the fuel tank flows even when the fuel tank is tilted or overturned due to a change in the environment outside the fuel tank Change can be suppressed, and since the diffusion preventing unit can be provided in a reduced volume, it is possible to provide the effect of easy movement or storage of the diffusion preventing unit.

And, as the method for manufacturing the flame spread prevention material includes an unwinding step, a slit forming step, a hollow forming step and a re-winding step, the flame spread prevention material can be manufactured by forming a slit and a hollow and then winding it again. , since it can be manufactured through relatively simple steps, the manufacturing process can be simplified. Since the sheet can be extended through a pair of drums, additional equipment is not required, thereby providing a cost reduction effect of manufacturing equipment.

1 is a perspective view showing a fuel tank for preventing flame spread according to an embodiment of the present invention.
2 is a perspective view illustrating a diffusion prevention unit according to an embodiment of the present invention.
3 is an internal cross-sectional view showing a fuel tank for preventing flame spread according to an embodiment of the present invention.
4 is an operating state diagram illustrating a state in which fuel is filled in the fuel tank for preventing flame spread according to an embodiment of the present invention.
5 is an internal cross-sectional view showing a fuel tank for preventing flame spread according to a second embodiment of the present invention.
6 is an operation state diagram illustrating a fuel tank for preventing flame spread according to a second embodiment of the present invention.
7 is an operation state diagram illustrating a state in which fuel is filled in the fuel tank for preventing flame spread according to the second embodiment of the present invention.
8 is a flowchart illustrating a flow of a method for manufacturing a flame spread prevention material according to an embodiment of the present invention.
9 is a perspective view illustrating a sheet before processing of a method for manufacturing a flame spread prevention material according to an embodiment of the present invention.
10 is a perspective view schematically illustrating a manufacturing apparatus according to a method for manufacturing a flame spread prevention material according to an embodiment of the present invention.
11 is a perspective view illustrating a cutter according to a method of manufacturing a flame spread prevention material according to an embodiment of the present invention.
12 is a plan view illustrating a slit-forming sheet and a hollow-forming sheet according to a method of manufacturing a flame spread prevention material according to an embodiment of the present invention.
13 is a flowchart showing the flow of a method for manufacturing a flame spread prevention material according to a second embodiment of the present invention.
14 is a perspective view schematically illustrating a manufacturing apparatus according to a method for manufacturing a flame spread prevention material according to a second embodiment of the present invention.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and are common in the art to which the present invention pertains. It is provided to fully inform those with knowledge of the scope of the invention, and the present invention is only defined by the scope of the claims.

In addition, the terminology used herein is for the purpose of describing the embodiments and is not intended to limit the present invention.

As used herein, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, "comprises" and/or "comprising" does not exclude the presence or addition of elements other than those mentioned.

Unless otherwise defined, all terms (including technical and scientific terms) used herein may be used with the meaning commonly understood by those of ordinary skill in the art to which the present invention belongs.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

1 is a perspective view showing a fuel tank for preventing flame spread according to an embodiment of the present invention, FIG. 2 is a perspective view showing a diffusion preventing part according to an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention An internal cross-sectional view showing a fuel tank for preventing flame spread according to FIG. 4 is an operating state diagram showing a state in which fuel is filled inside the fuel tank for preventing flame spread according to an embodiment of the present invention.

Prior to the full-scale description, the fuel tank 100 is preferably a fuel tank 100 for a ship provided so as to have a larger volume than other transportation means, but is not limited thereto, and a fuel tank mounted on transportation means such as automobiles and aircraft Of course, it can be applied to (100).

1 to 4 , the fuel tank 1000 for preventing flame spread according to an embodiment of the present invention includes a fuel tank 100 and a diffusion prevention unit 200 .

Here, the fuel tank 100 is provided to have a predetermined volume to accommodate the fuel F therein, and includes an upper outlet 110 and a lower outlet 120 .

In addition, the upper outlet 110 is provided at an upper side of the fuel tank 100 , and may serve as a refueling port for refueling the fuel F into the fuel tank 100 .

In addition, although not particularly shown in the drawings, the lower outlet 120 is provided on the lower side of the fuel tank 100 , and the consumption amount of the fuel F or the temperature of the fuel F accommodated in the fuel tank 100 . As a matter of course, a separate sensor capable of measuring the characteristics of the fuel F may be provided or connected to the transportation means to supply the fuel F to the transportation means.

In addition, the upper outlet 110 and the lower outlet 120 may be provided to have a predetermined space so that the diffusion prevention unit 200, which will be described later in more detail, can be loaded in the fuel tank 100. Of course.

And, the diffusion prevention unit 200 is filled in the fuel tank 100 to suppress the flow of the fuel (F), characterized in that at least one is provided.

More specifically, since the diffusion preventing unit 200 can suppress the flow of the fuel F, it is possible to suppress a situation in which the fuel F is volatilized according to the flow of the fuel F.

More preferably, the diffusion prevention unit 200 is provided to fill the maximum number of the internal volume of the fuel tank 100 to suppress the flow of the fuel F to the maximum. Of course, it is preferable to inject the fuel F into the fuel tank 100 after installing the diffusion prevention part 200 inside the fuel tank 100 .

Therefore, as the flame spread prevention tank 1000 includes the fuel tank 100 and the diffusion prevention part 200 filled in the fuel tank 100, when a fire occurs in the vehicle in which the fuel tank 100 is mounted, Since the flow of the fuel (F) can be suppressed by the diffusion prevention unit 200, volatilization, leakage, and leakage of the fuel (F) are minimized, so that the flame propagates inside the fuel tank 100 and causes great damage. can be prevented in

And, the diffusion prevention part 200 is characterized in that it includes a sheet (210).

Here, the sheet 210 is centered on one side and is characterized in that it is provided in the form of a roll wound in a direction perpendicular to the one side.

More preferably, the sheet 210 is formed of a thermally conductive material, so that heat generated outside the fuel tank 100 can be evenly transmitted to the entire tank, so that the heat is concentrated to a local portion of the fuel tank 100 . As a matter of course, it is provided to prevent damage to the fuel tank 100 .

In addition, the seat 210 is characterized in that at least one hollow 211 is provided on the surface so that the fuel (F) accommodated in the fuel tank 100 can be connected in communication.

More preferably, the hollow 211 is provided in a number corresponding to the total area of the seat 210, so as to have sufficient pores to be filled with the fuel F accommodated in the fuel tank 100 Of course.

In particular, as the diffusion prevention unit 200 is provided in the form of a rolled roll and includes the sheet 210 having a hollow 211 on the surface thereof, the fuel F is filled between the hollow 211 and the fuel tank 100 ) Even when the fuel tank 100 is tilted or overturned due to an external environmental change, it is possible to suppress a change in the flow of the fuel tank 100 .

That is, even if the fuel tank 100 is tilted due to a collision of a vehicle on which the fuel tank 100 is mounted, an external environment, etc. due to the diffusion prevention unit 200 , the fuel F flows through the upper outlet 110 . Since it is possible to prevent leakage, when a fire occurs outside the fuel tank 100 in a tilted state, it is possible to prevent the flame from spreading due to the fuel leaked into the fuel tank 100 .

In addition, since the diffusion prevention unit 20 may be provided in a reduced volume, it is possible to provide an effect of easy movement or storage of the diffusion prevention unit 200 .

Furthermore, the diffusion prevention part 200 is characterized in that it is stacked inside the fuel tank 100 .

In particular, since the diffusion prevention unit 200 can be stacked inside the fuel tank 100 to be loaded, even if the internal volume of the fuel tank 100 is different, the diffusion prevention unit 100 can be installed, improving product compatibility can do it

5 is an internal cross-sectional view showing a fuel tank for preventing flame spread according to a second embodiment of the present invention, FIG. 6 is an operational state diagram showing a fuel tank for preventing flame spread according to a second embodiment of the present invention, and FIG. 7 is an operation state diagram showing a state in which fuel is filled inside the fuel tank for preventing flame spread according to the second embodiment of the present invention.

5 to 7 , the fuel tank 1000 for preventing flame spread according to the second embodiment of the present invention may include a hatch 300 .

In addition, since the fuel tank 100 and the expansion prevention unit 200 are the same as in the above-described first embodiment, a detailed description thereof will be omitted.

Here, the hatch 300 is formed through the upper portion of the fuel tank 100 so that the diffusion prevention part 200 can be stacked and loaded inside the fuel tank 100 and is provided so as to be able to open and close. do it with

In addition, the hatch 300 is characterized in that it includes an opening and closing portion (310).

Therefore, after the user opens the opening and closing part 310, the diffusion prevention part 200 can be loaded inside the fuel tank 100, so that the user can provide convenience in installing the expansion prevention part 200. .

In addition, the upper outlet 110 is provided on the top surface of the hatch to inject the fuel F into the fuel tank 100, but is not limited thereto, and the fuel F can be injected. It can be formed at any location.

8 is a flowchart illustrating a flow of a method for manufacturing a flame spread prevention material according to an embodiment of the present invention, and FIG. 9 is before processing of a method for manufacturing a flame spread prevention material according to an embodiment of the present invention 10 is a perspective view schematically showing a manufacturing apparatus according to a method for manufacturing a flame spread prevention material according to an embodiment of the present invention, and FIG. 11 is a perspective view showing a sheet of the present invention. A perspective view showing a cutter according to a method of manufacturing a flame spread prevention material according to the invention, Figure 12 is a plan view showing a slit-forming sheet and a hollow-forming sheet according to a method for manufacturing a flame spread prevention material according to an embodiment of the present invention am.

8 to 12, the flame spread prevention material manufacturing method according to an embodiment of the present invention (S1000) unwinding step (S100), slit forming step (S200), hollow forming step (S300) and re-winding It is characterized in that it includes a step (S400).

Here, the flame spread prevention material manufacturing apparatus provided to proceed with the flame spread prevention material manufacturing method (S1000) of the present invention is characterized in that it includes a drum (S10) and a cutter (S20).

Here, the drum (S10) is characterized in that it is provided so as to wind the flame spread prevention material in the form of a sheet, the cutter (S20) is provided in plurality to be provided to cut the flame spread prevention material, characterized in that do.

More preferably, the flame spread prevention sheet 210, including any one or more selected from a metal mesh material, an aluminum alloy, a titanium alloy, and a copper alloy, may be provided with a material having flame resistance and durability, but is limited thereto It is not, and may be made of a suitable material according to the characteristics of the fuel F accommodated in the fuel tank 100 .

For reference, although not particularly shown in the drawings, the drum S10 includes a take-up roll provided to wind or unwind the sheet as the rotating shaft rotates therein.

That is, by providing the drum (S10), it is possible to unwind the sheet 210 provided in the form of a roll wound on the take-up roll, and the first drum (S11) and the second drum (S12) are included. do it with

For reference, at least one of the first drum (S11) and the second drum (S12) is provided. After the sheet 210 is mounted on the first drum (S11), the second drum (S12) is installed. By transferring the sheet 210 toward the sheet 210, it is characterized in that the process for the sheet 210 can be performed in one direction.

That is, in the unwinding step ( S100 ), the sheet 210 may be unwound by a first drum ( S11 ) disposed on one side of the one or more pairs of drums ( S10 ), the first drum ( S11 ) and the second drum ( S10 ). Of course, (S12) may be provided in plurality according to each process step.

Next, in the slit forming step ( S200 ), after the unwinding step ( S100 ), at least one slit ( S40 ) of a predetermined area is formed in the unwound sheet 210 , thereby forming a slit forming sheet in which the slit ( S40 ) is formed. characterized in that it is manufactured.

Furthermore, the slit forming step ( S200 ) is characterized in that the slit forming sheet is manufactured by forming a pattern of a predetermined shape on the sheet 210 through a plurality of cutters ( S20 ) arranged in a line.

And, the cutter ( S20 ) includes a first cutter ( S21 ) and a second cutter ( S22 ).

That is, the cutter (S20) is the first cutter (S21) and the second cutter (S22) crosswise descending toward the sheet 210 located in the flame spread prevention material manufacturing apparatus, the slit in the sheet (210) (S40) is formed.

In addition, the slit forming step ( S200 ) is characterized in that the slits ( S40 ) are formed in multiple stages in a direction orthogonal to the traveling direction of the sheet 210 unwound by the drum ( S10 ).

More specifically, the slits S40 generated in the slit forming step S200 are provided so that the number of slits S40 generated in the odd-numbered stage is different from the number of slits S40 formed in the even-numbered stage. do it with

More specifically, the first cutter (S21) creates the second slit (S42), the second cutter (S22) is provided to form the second slit (S42), more preferably, the slit Of course, the number of formations (S40) can be freely adjusted in consideration of the characteristics of the fuel (F) accommodated in the fuel tank (100).

That is, in the slit forming step (S200), when the fuel F filled in the fuel tank 100 has low viscosity and high fluidity, the number of the slits S40 is increased by increasing the number of the slits S40. By allowing the fuel (F) to communicate, it may be provided to suppress the flow of the fuel (F).

Therefore, due to the slit forming step ( S200 ), the maximum number of slits ( S40 ) can be formed in the area of the sheet 210 before processing, so that the porosity of the sheet 210 can be improved.

Next, in the hollow forming step (S300), an external force is applied to the slit forming sheet manufactured through the slit forming step (S200), and through the external force applied to the slit forming sheet, the area of the slit 100 It is characterized in that it is possible to manufacture a hollow sheet in which at least one hollow 211 is formed by expanding the .

Accordingly, the hollow forming step (S300) is executed after the slit forming step (S200), and the transfer direction of the slit forming sheet transferred from the drum (S10) disposed on one side to the drum (S10) disposed on the other side and It is characterized in that the force is applied in the same direction.

In summary, the slit (S40) formed in the slit forming step (S200) is formed in a direction perpendicular to the transfer direction of the sheet 210 before the processing, and the slit forming sheet is transferred in the hollow forming step (S300) As a force is applied in the direction, the hollow 211 is formed by expanding the slit S40.

Therefore, if the length of the sheet in which the slit S40 is formed is 'W1' and the length of the sheet in which the hollow 211 is formed is 'W2', 'W2' is characterized in that it has a larger value than 'W1' .

That is, due to the hollow forming step ( S300 ), as the slit forming sheet is extended by a predetermined length, the slit ( S40 ) may be formed into the hollow ( 211 ).

Further, the hollow 211 includes a first hollow 211a and a second hollow 211b, and in more detail, the first slot S41 forms a first hollow 211a and the second slot (S42) is characterized in that the second hollow (211b) is formed.

Therefore, the external force applied to the slit forming sheet in the hollow forming step (S300) extends the slit forming sheet through the force of the first drum (S11) and the second drum (S12) supporting the slit forming sheet to form a hollow Since the sheet can be manufactured, additional equipment necessary for forming the hollow 211 is not required, thereby providing a cost reduction effect of the manufacturing equipment.

And, the rewinding step (S400) is characterized in that the hollow forming sheet manufactured through the hollow forming step (S300) is wound in a roll form through a second drum disposed on the other side.

Therefore, as the flame spread prevention material manufacturing method includes the unwinding step (S100), the slit forming step (S200), the hollow forming step (S300), and the rewinding step (S400), the slit ( 100) and the hollow 200 are formed and then wound again to manufacture the flame spread prevention material, so it can be manufactured through relatively simple steps, thereby simplifying the manufacturing process required for manufacturing the flame spread prevention material. can provide

13 is a flowchart showing the flow of a method for manufacturing a flame spread prevention material according to a second embodiment of the present invention, and FIG. 14 is a method for manufacturing a flame spread prevention material according to a second embodiment of the present invention. It is a perspective view schematically showing a manufacturing apparatus according to the present invention.

13 to 14, as a second embodiment of the method (S1000) for manufacturing the flame spread prevention material of the present invention, the method (S1000) for manufacturing the flame spread prevention material is a vertical pressing step (S310) may further include.

Here, the upper and lower pressing step (S310) proceeds after the hollow forming step (S300), and the unwinding step (S100), the slit forming step (S200), the hollow forming step (S300) and the rewinding step (S400) are Since it is the same as the first embodiment described above, a detailed description thereof will be omitted.

First, the apparatus for manufacturing a flame spread prevention material capable of performing the upper and lower pressing step (S310) is characterized in that it includes at least one pair of upper and lower pressing members (S31) and guide members (S32).

Here, the upper and lower pressing members S31 are provided to press the front and rear ends of the slit forming sheet in the vertical direction.

That is, the upper and lower pressing members S31 may be provided to move while holding one end and the other end of the slit forming sheet.

And, the guide member (S32) may be provided to be positioned between the upper and lower pressing members (S31), characterized in that it is provided to help the transfer of the slit forming sheet.

Therefore, by providing the guide member (S32), it is possible to prevent the backing of the sheet 210 or stagnant progress, and the like.

That is, the guide member S32 may prevent in advance a situation in which the transfer of the slit forming sheet is not smooth due to the force applied to the slit forming sheet by the upper and lower pressing members S31 .

And, in the vertical pressing step (S310), the slit forming sheet is extended in the manufacturing direction through the vertical pressing member (S31) to expand the slit (S40) to form the hollow 211 characterized by being

Therefore, in addition to the force applied to the slit-forming sheet by the first drum (S11) and the second drum (S12) in the hollow forming step (S300), further toward the slit-forming sheet through the vertical pressing step (S310) force can be applied.

Therefore, in particular, when it is necessary to apply a stronger force than the force applied by the drum (S10) in the hollow forming step (S300), since it can be pressed through the up and down pressing step (S310), the hollow 211 through a simple manufacturing facility ) can be formed.

Therefore, the flame spread prevention material wound through the rewinding step (S400) is loaded in the fuel tank 100, so that the fuel F accommodated in the fuel tank 100 can be retained in the hollow 211. Therefore, it is possible to suppress the flow of the fuel (F), so that the volatilization, leakage, and leakage of the fuel (F) can be minimized, the effect of preventing in advance the flame propagation inside the fuel tank and causing great damage can provide

As described above, the present invention has been described with reference to the embodiments shown in the drawings, but this is only for explaining the invention, and various modifications or equivalents from the detailed description of the invention to those of ordinary skill in the art to which the present invention pertains It will be appreciated that one embodiment is possible.

Therefore, the true scope of the present invention should be determined by the technical spirit of the claims.

F: fuel
1000: fuel tank for preventing flame spread
100: fuel tank
110: upper outlet
120: lower outlet
200: diffusion prevention unit
210: sheet
211: hollow
211a: first hollow
212b: second hollow
300 : hatch
310: opening and closing part
S1000 : Method of manufacturing flame spread prevention material
S10: drum
S11: 1st drum
S12: 2nd drum
S20 : Cutter
S21: first drum
S22: 2nd drum
S30: pressurizing means
S31: upper and lower pressure members
S32: guide member
S40: Slit
S41: first slit
S42: second slit
S100: Unwinding step
S200: slit forming step
S300: hollow forming step
S310: up and down pressurization step
S400: rewinding step

Claims (3)

A fuel tank 100 capable of accommodating fuel therein;
a diffusion prevention unit 200 positioned inside the fuel tank 100 and provided with at least one so as to suppress the flow of the fuel; and
A hatch 300 that penetrates through the upper portion of the fuel tank 100 and is provided so as to be able to open and close, so that the diffusion prevention part 200 can be stacked and loaded inside the fuel tank 100; includes; and
The diffusion prevention unit 200,
A sheet 210 centered on one side, provided in the form of a roll wound in a direction perpendicular to the one side, and having at least one hollow 211 on its surface so that the fuel can communicate; A fuel tank for preventing flame spread, characterized in that. delete Flame spread using a flame spread prevention material manufacturing apparatus including at least one pair of drums (S10) for winding a sheet-shaped flame spread prevention material and a plurality of cutters (S20) provided to cut the flame spread prevention material In the method of manufacturing the prevention material (S1000),
an unwinding step (S100) of unwinding a sheet provided in a roll form by winding a first drum (S11) disposed on one side of the one or more pairs of drums (S10);
After the unwinding step (S100), a slit forming step (S200) of forming at least one slit (S40) of a predetermined area on the sheet 210 to produce a slit (S40) forming sheet;
By applying a force in the same direction as the transfer direction transferred from the winding roll disposed on one side to the winding roll disposed on the other side to the slit (S40) forming sheet manufactured through the slit forming step (S200), the slit (S40) Hollow forming step (S300) of expanding the area of at least one hollow 211 to form a hollow 211 formed sheet; and
Re-winding step (S400) of winding the hollow 211 forming sheet manufactured through the slit forming step (S200) in a roll form through the second drum (S12) disposed on the other side; A method of manufacturing a flame-proof material.

Images