KR102616062B1 - Replacement apparatus of flare tip for marine construction and replacement method using the same - Google Patents

Abstract

an extension platform extending from one side of the tip platform and rotatably provided; a tip flange connected to the lower part of the flared tip; at least one transfer rail provided at the bottom of the tip platform and the extension platform; A moving member that linearly reciprocates along the conveying rail; a lifting member connected between a moving member and the tip flange to lift the flared tip upward; a horizontal pulling member that moves the flared tip associated with the moving member between the tip platform and the extension platform; and a winch disposed on a fixed platform of the marine structure disposed below the tip platform and having one end of the winch capable of winding or unwinding a wire connected to the flare tip. With this configuration, the flare tip to be replaced or repaired is lifted from the tip platform to a certain position using a lifting member, pulled by a horizontal pulling member, transferred to the extension platform through a moving member and a transfer rail, then the extension platform is rotated, and the winch After performing the unloading operation using , a replacement method is performed in which a new flare tip is mounted on the tip platform in the reverse order of the unloading operation.

Description

Flare tip replacement device for marine structures and replacement method using the same {REPLACEMENT APPARATUS OF FLARE TIP FOR MARINE CONSTRUCTION AND REPLACEMENT METHOD USING THE SAME}

The present invention relates to a flare tip replacement device for marine structures and a replacement method using the same.

With industrialization, the use of various resources is rapidly increasing, and among them, the development of resources such as crude oil and natural gas has emerged as a very important issue.

Accordingly, in recent years, special vessels equipped with various exploration and drilling equipment, such as drill ships, semi-submersible drilling rigs, and floating production storage & offloading units (FPSO), have been introduced. It has been developed and is carrying out exploration and mining operations to produce various resources from the deep sea.

In addition to the FPSO mentioned above, there are, for example, FPSO for liquefied natural gas and various other offshore plants.

Flare towers are installed on these ships or offshore structures to burn and process waste gas remaining after refining crude oil or natural gas drilled from the seabed.

The flare tower is a safety facility that incinerates excess gas during refining and incinerates and discharges it at once when excessive gas is suddenly emitted.

The reason for treating waste gas by burning it is that waste gas generated during the production of oil or natural gas contains hydrocarbon-based substances of various chemical species, and if discharged as is into the atmosphere, it can cause air pollution. Therefore, a method of discharging the waste gas by burning it is usually used.

A flare tip that emits flame is installed at the end of the flare tower. After a certain period of time, these flare tips become unable to perform their normal function due to aging. In this case, it must be replaced according to the replacement procedure.

In the past, a helicopter was used to replace the flare tip, or an additional structure was installed on the tip platform where the flare tip was installed.

There are safety risks associated with using a helicopter.

When installing a separate structure, materials, manpower and time are required. When replacing the flare tip by installing a separate structure like this, workers must manually move the materials from the deck of the offshore structure to the tip platform, and since the structure is installed in a limited space, it takes a lot of time to manufacture the structure for replacement. .

Korean Patent Publication No. 10-2014-0086254 Korean Patent Publication No. 10-2015-0010277

The purpose of the present invention is to provide a flare tip replacement device for an offshore structure that is safe and advantageous in terms of time, space, and manufacturing cost, and a replacement method using the same.

According to one aspect of the present invention, an extension platform extends from one side of the tip platform on which the flare tip is installed and keeps the flare tip at a predetermined position when the flare tip is replaced; a tip flange connected to the lower part of the flared tip; at least one transfer rail provided on the bottom of the tip platform and the extension platform; A moving member that linearly reciprocates along the transport rail; a lifting member connected between the moving member and the tip flange to lift the flared tip upward; a horizontal pulling member that moves the flared tip connected to the moving member between the tip platform and the extension platform; and a winch disposed on a fixed platform of the marine structure disposed below the tip platform and having one end capable of winding or unwinding a wire connected to the flare tip.

The tip flange includes a ring-shaped body coupled to a lower portion of the flared tip; and a flange portion protruding from the main body in a radial direction, and the flange portion may be connected to the lifting member.

The lifting member includes a hydraulic jack, and a ram portion of the hydraulic jack may be separably connected to a flange portion of the tip flange.

A fastening nut portion is formed in the ram portion of the hydraulic jack, a fastening hole is formed in the flange portion of the tip flange, and a fastening bolt passes through the fastening hole to be fastened to the fastening nut portion of the ram portion of the hydraulic jack. there is.

The extension platform includes a lower bottom plate rotatably connected in a downward direction through a hinge unit; It may include a side plate disposed on one side of the lower bottom plate.

The horizontal pulling member may include a chain block with one hook connected to the flare tip and another hook connected to the extension platform.

A wire may be wound around the flare tip to connect the one hook of the chain block, and a lug may be formed on the extension platform to connect the other hook of the chain block.

A safety door may be provided at a portion of the tip platform connected to the extension platform.

It may further include a connecting bar connecting the moving members.

The tip platform may be provided with a storage box for storing the moving member, the horizontal pulling member, and the connecting bar.

The storage box may be made of heat-resistant material.

The extension platform may be provided with a pulley that rotatably supports the wire pulled out from the winch.

The transfer rail may be provided as an embedded type so as not to protrude from the bottom of the tip platform and the extension platform.

According to another aspect of the present invention, connecting a lifting member to the flared tip to lift it to a predetermined position on the tip platform and then transferring it from one side of the tip platform to an extension platform provided with an extension; connecting a wire drawn from a winch on a fixed platform disposed below the tip platform to the flare tip by passing it through a pulley provided on the extension platform; separating the lifting member from the flared tip; and lowering the flare tip from the extension platform.

The step of transferring the flared tip to the extension platform includes connecting a moving member on the tip platform and a transfer rail formed on the extension platform; Connecting a lifting member between the moving member and a tip flange provided on the flared tip; Lifting the flare tip to a predetermined position by driving the lifting member; and pulling the flare tip lifted to the predetermined position through a horizontal pulling member and transferring it to the center of the extension platform through a transfer rail and a moving member.

Between lifting the flare tip and transferring the flare tip to the center of the extension platform, a hook portion of the horizontal pulling member is connected to the flare tip and another hook portion of the horizontal pulling member is connected to the extending platform. A horizontal pulling member connection step may be further included.

The step of lowering the flare tip includes rotating the lower bottom plate of the extension platform in a downward direction through a hinge unit; And it may include lowering the flare tip through the secured space of the extension platform.

In the step of connecting the lifting member between the moving member and the tip flange provided on the flare tip, a fastening bolt is connected through a fastening hole formed in the flange portion of the tip flange and a fastening nut portion formed on the upper part of the lifting portion of the lifting member. By fastening, the lifting member can be fixedly connected to the tip flange portion without shaking.

Separate the wire of the winch from the flare tip lowered on the fixed platform of the marine structure, connect the wire of the winch to a new flare tip, and then install the new flare tip in the reverse order of the lowering order of the flare tip. The step of lifting and mounting on the tip platform may be further included.

According to the present invention, a rotatable extension platform is provided on one side of the tip platform, a tip flange to which a lifting member for lifting the flare tip is connectable is provided at the lower part of the flare tip, and the flare tip is positioned between the tip platform and the extension platform. It is configured to have a transport structure that allows horizontal transport, allowing the flare tip to be replaced quickly and at low cost while being safe.

Figure 1 is a perspective view showing the configuration of a flare tip replacement device of the present invention.
Figure 2 is a partially separated perspective view showing the configuration of the tip flange and lifting member of the flared tip of the present invention.
Figure 3 is a partial perspective view showing a state in which the flared tip of the present invention is transferred from the tip platform to the extension platform.
Figure 4 is a partial perspective view showing a state in which the lower floor plate of the extension platform of Figure 3 is rotated downward.
Figure 5 is a flowchart showing a method of replacing a flare tip of the present invention.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the attached drawings. However, the present invention is not limited to the embodiments disclosed below and will be implemented in various different forms. These embodiments only serve to ensure that the disclosure of the present invention is complete and to fully convey the scope of the invention to those skilled in the art. This is provided to inform you.

Figure 1 is a perspective view showing the configuration of a flare tip replacement device of the present invention.

Referring to Figure 1, the flared tip 3 is installed on the tip platform 10. The tip platform (10) is a bottom plate (11) where the flare tip (3) is installed. A handrail (12) installed along the edge of the bottom plate (11) and a safety door (13) provided on one side of the handrail (12). ) includes.

According to the present invention, an additional work space is provided on one side of the tip platform 10 for replacement of the flared tip 3, and the flared tip 3 is transferred from the tip platform 10 and then simply raised and lowered. A flare tip replacement device 100 configured to perform is provided.

The flare tip replacement device 100 of the present invention is useful for lowering the flare tip 3 from the tip platform 10 and then replacing it with a new flare tip and mounting it on the tip platform 10. The tip may include an aged flare tip 3 mounted on the tip platform 10 and a repaired flare tip that repairs the aged flare tip 3, including a different one.

The flared tip replacement device 100 includes an extension platform 110, a tip flange 130, a transport rail 140, a moving member 150, a lifting member 160, a horizontal pulling member 170, a winch 180, Includes a connecting bar 190 and a storage box 120.

The extension platform 110 is provided on one side of the tip platform 10, and is approximately erect from the lower bottom plate 111 connected to the bottom plate 11 of the tip platform 10 and the lower bottom plate 111 in a horizontal state. It includes an arranged side plate 113.

The lower bottom plate 111 is composed of, for example, two lower bottom plates 111a and 111b that can be rotated in the downward direction through the hinge unit 114 to secure a space for the flare tip 3 to descend. do.

The extension platform 110 may be made of a material that can withstand high temperatures and corrosion, such as an alloy made of nickel, chromium, or iron. The extension platform 110 may be made of, for example, Inconel (trade name) material.

The tip flange 130 is connected to the lower part of the flared tip (3). The tip flange 130 may be integrally coupled to the flared tip 3 or may be separably coupled thereto. That is, the tip flange 130 is provided in advance on the flare tip 3 before the flare tip 3 is installed on the tip platform 10, or is configured to be detachable from the flare tip 3 so that the flare tip 3 can be replaced. It may be configured to be coupled to the lower exterior of the flare tip (3).

The transfer rail 140 is installed on the bottom plate 11 of the tip platform 10 and the lower bottom plate 111 of the extension platform 110. The transfer rail 140 is arranged in a substantially straight line from the bottom plate 11 of the tip platform 10 to the lower bottom plate 111 of the extension platform 110. In the drawing, two transport rails 140 are shown arranged side by side at a certain interval. The transfer rail 140 is installed embedded in the bottom plate 11 of the tip platform 10 and the lower bottom plate 111 of the extension platform 110 to prevent interference with workers or tools. The transfer rail 140 is configured to be cut, for example, at the boundary between the bottom plate 11 of the tip platform 10 and the lower bottom plate 111 of the extension platform 110, so that it interferes with the rotational movement of the extension platform 111. Make sure it doesn't happen.

The moving member 150 is capable of linear reciprocating movement along the transfer rail 140 and may have various forms, such as a roller member capable of rolling movement, or a member fitted on the transfer rail 140 and capable of sliding.

The lifting member 160 is connected to the moving member 150 and the tip flange 130 and is configured to lift the flared tip 3 to a certain height on the tip platform 10. The lifting member 160 may include, for example, a hydraulic jack (hereinafter referred to as “hydraulic jack 160”). In another embodiment, the lifting member 150 may include various lifting and lowering structures, such as a rack-and-pinion gear structure, a motor, a linear motion structure including a transfer nut and transfer screw, a guide rail, etc.

The horizontal pulling member 170 provides a pulling force to the flared tip 3 so that the flared tip 3 can be moved horizontally through the transport rail 140 and the moving member 150. The horizontal pulling member 170 has one hook 171 (hereinafter referred to as “first hook 171”) connected to the flared tip 3 and another hook 173 (hereinafter referred to as “first hook 171”) connected to the extension platform 110. It may include a chain block having 2 hooks (referred to as “173”) and a connecting chain (174). Hereinafter, the horizontal pulling member 170 is referred to as “chain block 170.”

The chain block wire 175 is wound around the flare tip 3 and connected to the first hook 171 of the chain block 170. The extension platform 110, for example, the side plate 113, is provided with a lug 115 to which the second hook 173 of the chain block 170 is connected.

A connecting bar 190 is connected between the moving members 150 so that the transfer operation of the flare tip 3 can be performed safely and firmly.

On one side of the bottom plate (11) of the tip platform (10), there is a storage box (120) for storing various components used when replacing the flare tip (3), such as a hydraulic jack (160), a moving member (150), and a connecting bar (190). This can be provided. The storage box 120 is made of a material with excellent heat resistance and can sufficiently withstand a high temperature incineration atmosphere to safely store durable components.

The winch 180 is employed to raise and lower the flare tip 3. The winch 180 is disposed on a fixed platform 5 disposed below the tip platform 10, for example, on the deck of an offshore structure. The winch 180 includes a cylindrical drum 181 and a wire 183 installed on the drum 181 to be able to be wound and unwound. A pulley 185 is disposed on the extension platform 110, for example, the side plate 113, to transferably support the wire 183.

The wire 183 is not substantially connected to the flared tip 3 when the flared tip 3 is installed on the tip platform 10.

Figure 2 is a partially separated perspective view showing the configuration of the tip flange and lifting member of the flared tip of the present invention.

Referring to FIG. 2, a tip flange 130 is installed at the lower part of the flared tip 3. The tip flange 130 includes a body portion 131 having a substantially ring shape to be fitted into the lower portion of the flared tip 3 and a plurality of flange portions 133 protruding from the body portion 131 in the radial direction.

A fastening hole 133a is formed in the flange portion 133. The hydraulic jack 160 includes a ram portion 163 installed inside the cylinder 161 to be able to move up and down. A fastening nut portion 163a is formed at the top of the ram portion 163. Through this configuration, the flare tip 3 and the hydraulic jack 160 can be firmly coupled without being separated using the fastening bolt 135. That is, as the fastening bolt 135 is fastened through the fastening hole 133a formed in the flange portion 133 of the tip flange 130 and the fastening nut portion 163a of the ram portion 163, the hydraulic jack 160 is connected to the tip. It is fixed without shaking from the flange 130 and can perform a smooth lifting operation. The fastening nut portion 163a formed on the ram portion 163 has a structure that does not affect leakage of fluid in the cylinder 161 of the hydraulic jack 160. The fixing structure of the flange portion 133 and the hydraulic jack 160 is not limited to this and can be modified into various coupling structures.

Figure 3 is a partial perspective view showing a state in which the flared tip of the present invention is transferred from the tip platform to the extension platform.

Referring to FIG. 3, the flare tip 3 is given a horizontal moving force using the chain block 170 and is transferred to the center of the extension platform 110 through the transfer rail 140 and the moving member 150. The flare tip 3 transferred to the central part of the extension platform 110 in this way is connected to the wire 183 drawn from the drum 181 of the winch 180 for lowering. The wire 183 is connected to the flare tip pad eye 3a provided on the flare tip 3.

Figure 4 is a partial perspective view showing a state in which the lower floor plate of the extension platform of Figure 3 is rotated downward.

Referring to FIG. 4, the lower bottom plates 111a and 111b of the extension platform 110 rotate downward through the hinge unit 114 to secure space for the lowering motion of the flare tip 3. Therefore, the flare tip 3 can descend smoothly through the space secured by the rotation of the lower bottom plates 111a and 111b.

Next, a method of replacing the flare tip using the replacement system 110 configured as described above will be described.

Figure 5 is a flowchart showing a method of replacing a flare tip of the present invention.

Referring to Figure 5, the flare tip replacement method broadly includes connecting a lifting member to the flare tip, lifting it to a certain position on the tip platform, and then transferring it from one side of the tip platform to an extension platform provided with an extension (S10), and tip platform ( Connecting the wire drawn from the winch on the fixed platform disposed at the lower part of 10) to the flare tip by passing it through a pulley provided on the extension platform (S20), separating the lifting member from the flare tip (S30), and lowering the flare tip from the extension platform (S40).

Hereinafter, each step will be described in more detail.

1 to 3 and 5, the flare tip 3 transfer step (S10) includes the step of connecting the movable member 150 on the transfer rail 140 (S11), the movable member 150 and the flare. A step of connecting a hydraulic jack 160, which is a lifting member, between the tips 3 (S12), a step of driving the hydraulic jack 160 to lift the flare tip 3 (S13), and a chain block 170, which is a horizontal pulling member. Connecting the flare tip (3) and the extension platform (110) (S15), opening the safety door (13) of the tip platform (10) (S16), and connecting the flare tip (3) to the extension platform (S16). It includes a step (S17) of transferring to 110).

In the step (S11) of connecting the moving member 150 on the transfer rail 140, a connecting bar 190 is used to connect the two moving members 150 in a direction perpendicular to the moving direction of the transfer rail 140. Connect. With this configuration, when the flare tip 3 is pulled through the chain block 170, the flare tip 3 can be stably transported through the moving member 150 and the transfer rail 140.

In the step S11 of connecting the hydraulic jack 160 between the moving member 150 and the flare tip 3, the hydraulic jack 160 is connected to the flare tip 3 through the tip flange 130.

Referring to FIG. 2, the fastening bolt 15 penetrates the fastening hole 133a of the flange portion 133 of the tip flange 130 connected to the lower part of the flare tip 3 and then is connected to the ram portion 163 of the hydraulic jack 160. ) is coupled to the fastening nut portion (163a) formed at the top of the. Therefore, the flare tip 3 is connected to the hydraulic jack 160 without shaking. Here, the tip flange 130 may be provided in advance to the flared tip 3 before the flared tip 3 is installed on the tip platform 10. In another embodiment, the tip flange 130 is configured to be detachable from the flare tip 3 and can be coupled to the lower exterior of the flare tip 3 when the flare tip 3 is replaced.

In the step (S13) of driving the hydraulic jack 160 to lift the flare tip 3, for example, when fluid is supplied into the cylinder 161 of the hydraulic jack 160, the ram portion 163 rises and the flare tip 3 ) rises to a certain height. At this time, as the ram portion 163 and the tip flange 130 of the flared tip 3 are fixed through the fastening bolt 135, the ram portion 163 performs a stable lifting operation without moving with respect to the flared tip 3. Do what you can.

Referring to FIG. 1, in the step (S15) of connecting the chain block 170, which is a horizontal pulling member, to the flare tip 3 and the extension platform 110, the first hook portion 171 of the chain block 170 is Connected to the flare tip 3, the second hook portion 173 of the chain block 170 is connected to the side plate 113 of the extension platform 110. The first hook portion 171 is connected to the chain block wire 171 wound around the flare tip 3, and the second hook portion 173 is connected to the lug 115 provided on the side plate 113 of the extension platform 110. ) is connected to.

In the step (S16) of opening the safety door 13 of the tip platform 10, the safety door 13 is opened and the safety rail 140 disposed on the tip platform 10 and the extension platform 110 is disposed. A certain portion of the hand rail 12 corresponding to is opened. This configuration allows the flared tip 3 to be smoothly transferred from the tip platform 10 to the extension platform 110. The safety door 13 eliminates the risk of safety accidents by completely blocking the hand rail 12 of the tip platform 10 when performing the normal function of the flare tip 3.

In the step (S20) of connecting the wire 183 of the winch 180 to the flare tip 3, the fixed platform 5 disposed at the lower part of the tip platform 10, for example, the winch 180 on the deck of the offshore structure. The wire 183 is unwound from the drum 181 and passed through the pulley 185 provided on the side plate 113 of the extension platform 110 to the flare tip pad eye 3a provided on the flare tip 3. Connect the wire (181).

In the step (S30) of separating the hydraulic jack (160), which is a lifting member, from the flare tip (3), the fastening bolt performed in the step (S11) of connecting the hydraulic jack (160) between the moving member (150) and the flare tip (3) (135) It is carried out in the reverse order of the fastening operation. After the hydraulic jack 160 is separated from the flare tip 3, the flare tip 3 is lowered (S40).

The step of lowering the flare tip 3 from the extension platform 110 (S40) includes the step of rotating the lower bottom plates 111a and 111b of the extension platform 110 downward through the hinge unit 114 (S41). and a step (S42) of lowering the flare tip 3 through the space secured by rotation of the lower bottom plates 111a and 111b.

In the step (S41) of rotating the lower bottom plates 111a and 111b of the extension platform 110 downward through the hinge unit 114, the chain block wire wound around the chain block 170 and the flare tip 3 ( 175) can be separated.

While rotating the lower bottom plates 111a and 111b of the extension platform 110, the flare tip 3 is hung by the wire 183 of the winch 180, which is transportably supported by the pulley 185. maintain Accordingly, when the lower floor plates 111a and 111b are rotated to secure a vertical lowering space, the flare tip 3 is lowered by the lowering operation of the winch 180 and is transferred to the fixed platform 5, for example, the deck of an offshore structure.

Next, separate the wire 183 of the winch 180 from the flare tip lowered on the fixed platform 5 of the marine structure, connect the wire 183 of the winch 180 to the new flare tip, and connect the flare tip described above. A step (S50) of lifting the new flare tip and mounting it on the tip platform 10 is performed in the reverse order of the lowering sequence of (3).

As described above, after the flare tip (3) replacement work is completed, the hydraulic jack (160), moving member (150), connecting bar (190), chain block (170), chain block wire (171), etc. are replaced with the tip platform (10). ) is stored in the storage box 120 provided on the bottom plate 11. The storage box 120 is made of a material with excellent heat resistance and can sufficiently withstand the high-temperature thermal atmosphere generated during the incineration process of the flare tower, so that the components contained therein can be safely stored.

3: Flare tip 5: Fixed platform
10: tip platform 110: extension platform
120: storage box 130: tip flange
140: transfer rail 150: moving member
160: Lifting member (hydraulic jack) 170: Horizontal pulling member (chain block)
180: winch 183: winch wire
190: Connecting bar

Claims (19)

an extension platform extending from one side of the tip platform on which the flare tip is installed and allowing the flare tip to stand by at a predetermined position when the flare tip is replaced;
a tip flange connected to the lower part of the flared tip;
at least one transfer rail provided on the bottom of the tip platform and the extension platform;
a moving member that linearly reciprocates along the transport rail;
a lifting member connected between the moving member and the tip flange to lift the flared tip upward;
a horizontal pulling member that moves the flared tip connected to the moving member between the tip platform and the extension platform; and
A winch disposed on a fixed platform of an offshore structure disposed below the tip platform and having one end capable of winding or unwinding a wire connected to the flare tip,
The tip flange includes a ring-shaped body coupled to the lower part of the flared tip; and a flange portion protruding from the main body in a radial direction, wherein the flange portion is connected to the lifting member. delete 2. The method of claim 1, wherein the lifting member comprises a hydraulic jack,
A replacement device for a flare tip for marine structures in which the ram portion of the hydraulic jack is removably connected to the flange portion of the tip flange. The method of claim 3, wherein a fastening nut portion is formed on the ram portion of the hydraulic jack,
A fastening hole is formed in the flange portion of the tip flange,
A replacement device for a flare tip for an offshore structure in which a fastening bolt penetrates the fastening hole and is fastened to the fastening nut of the ram portion of the hydraulic jack. According to claim 1, wherein the extension platform includes a lower bottom plate rotatably connected in a downward direction through a hinge unit;
A replacement device for a flare tip for a marine structure including a side plate disposed on one side of the lower bottom plate. 2. Apparatus according to claim 1, wherein the horizontal pulling member includes a chain block with one hook connected to the flare tip and the other hook connected to the extension platform. The method of claim 6, wherein a wire is wound around the flare tip to connect the one hook of the chain block,
A replacement device for a flare tip for a marine structure, wherein a lug is formed on the extension platform to which another hook of the chain block is connected. The replacement device for a flare tip for an offshore structure according to claim 1, wherein a safety door is provided at a portion of the tip platform connected to the extension platform. The replacement device for a flare tip for a marine structure according to claim 1, further comprising a connecting bar connecting the moving member. The device of claim 9, wherein the tip platform is provided with a storage box for storing the moving member, the horizontal pulling member, and the connecting bar. The device of claim 10, wherein the storage box is made of a heat-resistant material. The replacement device for a flare tip for an offshore structure according to claim 1, wherein the extension platform is provided with a pulley for rotatably supporting the wire pulled out from the winch. The replacement device for a flared tip for an offshore structure according to claim 1, wherein the transfer rail is provided in an embedded type so as not to protrude from the bottom of the tip platform and the extension platform. Connecting a lifting member to the flared tip to lift it to a predetermined position on the tip platform and then transferring it from one side of the tip platform to an extension platform provided with an extension;
connecting a wire drawn from a winch on a fixed platform disposed below the tip platform to the flare tip by passing it through a pulley provided on the extension platform;
separating the lifting member from the flared tip; and
lowering the flare tip from the extension platform,
The step of transferring the flared tip to the extension platform includes connecting a moving member on the tip platform and a transfer rail formed on the extension platform; Connecting a lifting member between the moving member and a tip flange provided on the flared tip; Lifting the flare tip to a predetermined position by driving the lifting member; and pulling the flare tip lifted to the predetermined position through a horizontal pulling member and transporting it to the center of the extension platform through a transfer rail and a moving member. delete 15. The method of claim 14, wherein between lifting the flare tip and transferring the flare tip to the center of the extension platform, a hook portion of the horizontal pulling member is connected to the flare tip and another hook of the horizontal pulling member is connected to the flare tip. A method of replacing a flared tip further comprising connecting a horizontal pulling member connecting the portion to the extension platform. The method of claim 14, wherein the step of lowering the flare tip includes rotating the lower bottom plate of the extension platform downward through a hinge unit; and
A method of replacing a flare tip of an offshore structure, comprising lowering the flare tip through a space secured by rotation of the lower deck of the extension platform. The method of claim 14, wherein in the step of connecting the lifting member between the moving member and the tip flange provided on the flare tip, a fastening hole formed in a flange portion of the tip flange and a fastening hole formed in an upper portion of the lifting portion of the lifting member. A method of replacing a flared tip of an offshore structure in which the lifting member is fixedly connected to the flange portion of the tip flange without shaking by fastening a fastening bolt through a nut portion. 15. The method of claim 14, wherein the wire of the winch is separated from the flare tip lowered on the fixed platform of the marine structure, and the wire of the winch is connected to a new flare tip in the reverse order of the lowering order of the flare tip. A method of replacing a flare tip of an offshore structure further comprising lifting the new flare tip and mounting it on the tip platform.

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