KR101739392B1 - Installation crane constructing method for the flaretip replacement of ocean structure construction - Google Patents

Installation crane constructing method for the flaretip replacement of ocean structure construction Download PDF

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Publication number
KR101739392B1
KR101739392B1 KR1020150089988A KR20150089988A KR101739392B1 KR 101739392 B1 KR101739392 B1 KR 101739392B1 KR 1020150089988 A KR1020150089988 A KR 1020150089988A KR 20150089988 A KR20150089988 A KR 20150089988A KR 101739392 B1 KR101739392 B1 KR 101739392B1
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KR
South Korea
Prior art keywords
crane
portable
flare stack
flare
block
Prior art date
Application number
KR1020150089988A
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Korean (ko)
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KR20170000700A (en
Inventor
박공만
이욱동
Original Assignee
세호엔지니어링 주식회사
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Priority to KR1020150089988A priority Critical patent/KR101739392B1/en
Publication of KR20170000700A publication Critical patent/KR20170000700A/en
Application granted granted Critical
Publication of KR101739392B1 publication Critical patent/KR101739392B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • B63B2035/448—Floating hydrocarbon production vessels, e.g. Floating Production Storage and Offloading vessels [FPSO]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C2700/00—Cranes
    • B66C2700/01—General aspects of mobile cranes, overhead travelling cranes, gantry cranes, loading bridges, cranes for building ships on slipways, cranes for foundries or cranes for public works

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Jib Cranes (AREA)

Abstract

The present invention relates to a method for installing a crane for replacing a flare tip of a marine structure in which a crane is installed on a flare stack for replacement of a flare tip of an offshore structure having a liquefied natural gas storage tank, A step of fixing the crane, a step in which the operator installs the temporary rope on the portable crane, the wire rope is installed on the portable crane while moving the temporary rope while the wire rope is connected to the temporary rope, Connecting a crane block coupled with a post, stay, and boom in a folded state to a wire rope, moving the crane block to a position above the flare stack using a portable crane, A step of moving installation, a post of a crane block with a portable crane, This, unfolding the boom assembly to provide a way to install the flare tip replacement crane in marine structures, including the steps to install the main crane.
According to the installation method of the crane for replacing the flare tip of the offshore structure, after the operator installs the portable crane on the top of the flare stack, the main crane used when replacing the flare tip is installed on the top of the flare stack using a portable crane As a result, the installation work time of the crane is reduced and the occurrence of the safety accident can be suppressed.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of installing a crane for a flare tip of an offshore structure,

The present invention relates to a method of installing a crane for replacing a flare tip of an offshore structure, and more particularly, to a method of installing a crane on a flare stack so as to replace a flare tip for burning various gases in a cargo tank of an offshore structure .

Generally, a storage tank for storing cryogenic liquefied natural gas is formed in a liquefied natural gas carrier or a marine storage facility or the like. At this time, in the process of storing liquefied natural gas, a large amount of boil-off gas (BOG) is generated in the storage tank due to heat transfer from the outside of the storage tank and movement of the ship.

This evaporation gas can increase the pressure inside the liquefied natural gas storage tank and, in the worst case, explode the storage tank itself. Therefore, there is a need to adjust the pressure of the storage tank to an appropriate pressure level.

For this purpose, in order to incinerate excess gas due to the waste gas generated in the LNG production facility and the unexpected situation during the operation of the facility, in the case of the floating LNG production and storage facility (LNG FPSO) And a flare system comprising a flare tip is applied.

At this time, the flare tip is a portion where the flame is sprayed, and it should be replaced after a certain period of use due to high temperature. Therefore, a crane is installed on the top of the flare stack through a conveying means such as a helicopter to perform the work.

However, conventionally, due to wind and sea waves, there is a problem that the crane is installed with a lot of restrictions, and the crane and the flare stack collide with each other.

Such a method of installing the crane is disclosed in Korean Patent Laid-Open No. 1998-0001804 (Mar.

It is an object of the present invention to provide a method for installing a crane for replacing a flare tip of an offshore structure, which enables a crane to be installed stably on the top of the flare stack.

The present invention relates to a method of installing a crane for replacing a flare tip of an offshore structure in which a crane is installed above a flare stack for replacement of a flare tip of an offshore structure having a liquefied natural gas storage tank, A step of installing the portable rope in the portable crane after the operator installs the rope in the portable crane and moving the rope in a state where the wire rope is connected to the rope, Connecting a crane block connected to the deck of the offshore structure in a folded state of the post, stay, and boom to the wire rope, and moving the crane block to the upper portion of the flare stack with the portable crane; The worker moves the portable crane to the upper portion of the flare stack And installing a main crane by unfolding and assembling a post, a stay, and a boom of the crane block with the portable crane, thereby providing a method of installing a crane for a flare tip replacement of an offshore structure.

The crane block is connected to the upper end of the flare stack and the other end is connected to the deck of the offshore structure so that the crane block is moved to the upper end of the upper surface of the flare stack with the portable crane. , The crane block can be guided upward while being in contact with the guide line.

The boom of the crane block is constituted by a plurality of boom frames, and the boom frames are hinged to each other to be foldable. One end of the boom is hinged to the post, A lifting frame may be connected to the upper portion of the crane block so as to be connected to the wire rope of the portable crane.

In addition, the deck of the offshore structure is provided with a main winch on which a main rope is wound. A plurality of guide lead blocks are mounted on the flare stack so as to be spaced apart from each other in the vertical direction, and the crane block is mounted on the flare stack After the main rope is connected to the wire rope of the portable crane, one end of the main rope wound on the main winch is connected to the wire rope of the portable crane, and then the main rope is guided by the guide lead blocks, To be placed on top of the flare stack.

According to the method of installing a crane for replacing a flare tip of an offshore structure according to the present invention, after an operator installs a portable crane on an upper portion of the flare stack, a main crane It is possible to reduce the installation work time of the crane and to suppress the occurrence of the safety accident.

1 is a flowchart illustrating a method of installing a crane for replacing a flare tip of an offshore structure according to an embodiment of the present invention.
FIG. 2 and FIG. 3 are state diagrams showing the step S100 of FIG.
4 is a state diagram showing the step S110 of FIG.
5 is a cross-sectional view showing a crane block.
6 is a state diagram showing step S120 of FIG.
7 is a state in which a guide line is installed in the flare stack.
8 is a state in which a main rope is installed in a flare stack.
9 is a state diagram showing the step S130 of FIG.
10 is a state diagram showing step S140 of FIG.

Hereinafter, a method of installing a crane for installing an offshore structure according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 10. FIG.

First, a portable crane 100 is fixed to an upper end of a flare stack 10 of an offshore structure having a liquefied natural gas storage tank (not shown) (S100). 2 and 3, the operator moves the portable crane 100 to the uppermost position of the flare stack 10 and then fixes the portable crane 100 to the top end of the flare stack 10 . The portable crane 100 then moves the main crane 200 installed on the flare stack 10 to the uppermost position of the flare stack 10 on the deck of the offshore structure, As shown in FIG.

When the portable crane 10 is installed at the top end of the uppermost end of the flare stack 10 of the offshore structure in step S100, the portable crane 10 can move the crane block 201 The wire rope 300 is installed on the portable crane 10 (S200). That is, the wire rope 300 is connected to the portable crane 10 so that the crane block 201 can be transported in a connected state. At this time, the wire rope 300 installed in the portable crane 100 is made of a steel material having high rigidity, and the portable crane 100 disposed at the top end of the uppermost end of the flare stack 10 by the operator Connection can not be installed. 4, the worker firstly connects the fabric rope 301 to the portable cranes 100 and then attaches the wire rope 300 to one end of the fabric rope 301 in the longitudinal direction thereof. The winch of the portable crane 10 is operated to move the wire rope 300 and the wire rope 300 is connected to the portable crane 100.

After the step S200, the crane block 201 is connected to the wire rope 300, and the crane block 201 is moved to the top surface of the flare stack 10 by the portable crane 100 (S300). 5, the crane block 201 is a structure in which a post 202, a stay 203, and a boom 204, which constitute a crane, are coupled to each other in a folded state in a deck of the offshore structure. At this time, one end of the post 202 and the boom 204 may be hinged to one side of the stay 203 to be disposed in a folded state. In addition, the boom 204 is constituted by a plurality of boom frames 204a, 204b and 204c, and the mutually contacting ends of the boom frames 204a, 204b and 204c are hinged to each other to be foldable I have. The upper portion of the crane block 201 connected to the post 202, the stay 203 and the boom 204 in a folded state can be connected to the end of the wire rope 300 of the portable crane 100 The lifting frame 210 may be connected.

6, when the crane block 201 connected to the lifting frame 210 is connected to the wire rope 300 of the portable crane 100, the portable crane 100 is operated , And moves the crane block (201) on the uppermost surface of the flare stack (10) so as to be placed and placed.

In the step of moving the crane block 201 to the top surface of the flare stack 10 with the portable crane 100, the flare stack 10 of the crane block 201 through the portable crane 100 may be moved, The guide line 302 may be connected to the flare stack 10 so as not to collide with the flare stack 10 when the crane block 201 is moved vertically before the crane block 201 is moved to the uppermost plane. 7, one longitudinal end of the guide line 302 is connected to the top end of the top surface of the flare stack 10, and the other end is connected to the deck of the offshore structure. Therefore, when the crane block 201 moves vertically through the operation of the portable crane 100, the crane block 201 is guided upward while being held in contact with the guide line 302, The collision with the vehicle body 10 is prevented.

In addition, after step S300, a step may be performed in which the one end in the longitudinal direction of the main rope 302 to be connected to the main crane 200 is disposed on the uppermost surface of the flare stack 10. That is, referring to FIG. 8, a main winch 20, on which the main rope 302 is wound, is provided on a deck of the offshore structure. A plurality of guide lead blocks 21 are mounted on the flare stack 10 so as to be vertically spaced from each other. Here, the guide lead blocks 21 serve as rolls for guiding the main rope 302. The main rope 302 is connected to the wire rope 300 of the portable crane 100 and then the main rope 302 is wound around the guide lead block 21 on the uppermost surface of the flare stack 10 in a state in which they are guided.

After step S300, the operator moves the portable crane 100 from the upper end of the upper surface of the flare stack 10 to the rear end thereof, and reinstalls the portable crane 100 (S400). 9, the portable crane 100 is disposed on the other side of the crane block 201 around the flare tip 11 installed in the flare stack 10, So that it is possible to provide a space that can be unfolded and assembled.

After the portable crane 100 is moved to the uppermost position of the flare stack 10 and reinstalled (S400), the crane block 201 is unfolded to be used for replacing the flare tip 11 The main cranes 200 are installed (S500). 10, the post 202, the stay 203, and the boom 204 of the crane block 201 are respectively deployed using the portable crane 100, .

According to the method for installing the flare tip replacement crane of the offshore structure, the operator installs the portable crane 100 on the flare stack 10, and then, using the portable crane 100, The main crane 200 used when replacing the flare tip 11 is installed on the upper portion of the flare stack 10 so that the installation work time of the crane is reduced and the occurrence of safety accidents can be suppressed.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

10: Flare stack 11: Flare tip
20: main winch 21: guide lead block
100: Portable crane 200: Main crane
201: crane block 202: post
203: stay 204: boom
210: lifting frame 300: wire rope
301: hypothetical rope 302: guideline

Claims (4)

CLAIMS 1. A method for installing a flare tip replacement crane in an offshore structure in which a crane is installed on a flare stack for replacement of a flare tip of an offshore structure having a liquefied natural gas storage tank,
The operator fixing the portable crane to the upper end of the flare stack;
A step of installing the wire rope on the portable crane while moving the temporary rope in a state where the wire rope is connected to the temporary rope after the operator installs the temporary rope on the portable crane;
Connecting a crane block connected to the deck of the offshore structure in a folded state of the post, stay, and boom to the wire rope, and moving the crane block on the flare stack with the portable crane;
Reinstalling the portable crane in a state in which the operator moves the portable crane from a top end of the flare stack to a rear end of the flare stack so as to provide a space where the crane block can be unfolded and assembled to the top of the flare stack;
And assembling and installing the main crane while assembling and fixing the posts, stays, and booms of the crane block in an unfolded state, while supporting and connecting the portable crane to the crane block, respectively,
Wherein the boom of the crane block is constituted by a plurality of boom frames and the boom frames are hinged to each other so that they can be folded and one end of the boom is hinged to the posts, How to install Tip replacement crane. The method according to claim 1,
Wherein one end of the flare stack is connected to an upper end of the flare stack and the other end is connected to a deck of the marine structure,
Moving the crane block to the top of the flare stack with the portable crane,
Wherein the crane block is guided upward while being in contact with the guide line. The method according to claim 1,
Wherein a lifting frame is connected to an upper portion of the crane block so as to be connected to a wire rope of the portable crane. The method according to claim 1,
On the deck of the offshore structure, a main winch is wound around the main rope,
Wherein a plurality of guide lead blocks are mounted on the flare stack so as to be spaced apart from each other in a vertical direction,
After the step of moving the crane block to the top end of the flare stack with the portable crane,
Connecting one end of the main rope wrapped around the main winch to the wire rope of the portable crane and then placing the main rope on the top of the flare stack while being guided by the guide lid blocks A method of installing a flared tip replacement crane in an offshore structure further comprising:

KR1020150089988A 2015-06-24 2015-06-24 Installation crane constructing method for the flaretip replacement of ocean structure construction KR101739392B1 (en)

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KR1020150089988A KR101739392B1 (en) 2015-06-24 2015-06-24 Installation crane constructing method for the flaretip replacement of ocean structure construction

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KR1020150089988A KR101739392B1 (en) 2015-06-24 2015-06-24 Installation crane constructing method for the flaretip replacement of ocean structure construction

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KR101739392B1 true KR101739392B1 (en) 2017-06-08

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101068229B1 (en) * 2011-04-19 2011-09-29 신우개발 (주) Dismantled tower crane cargo handling system and cargo handling method using thereof
KR101239990B1 (en) 2012-08-17 2013-03-07 권동현 Mini crane

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101068229B1 (en) * 2011-04-19 2011-09-29 신우개발 (주) Dismantled tower crane cargo handling system and cargo handling method using thereof
KR101239990B1 (en) 2012-08-17 2013-03-07 권동현 Mini crane

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