KR20200100896A - Length adjustable staging for LNG cargo tank - Google Patents

Abstract

Disclosed is a length-adjustable special foothold for an LNG cargo hold. According to one embodiment of the present invention, the length-adjustable special foothold for the LNG cargo hold, which comprises an extension/contraction unit which is able to adjust the length. The extension/contraction unit can include: an upper extension/contraction unit which includes an upper base body placed in a horizontal direction, and an upper slide body which has one end inserted into the upper base body to move forward/backward; a lower extension/contraction unit which includes a lower base body placed in a horizontal direction by being distanced from the upper base body downwards for a certain height, and a lower slide body which has one end inserted into the lower base body to move forward/backward; a first upper/lower supporter which supports the part between the upper base body and the lower base body; and a second upper/lower supporter which supports the part between an end of the upper slide body and an end of the lower slide body. The present invention aims to provide a length-adjustable special foothold for the LNG cargo hold, which is able to reduce the contact friction and to make the length adjustable in a smooth manner.

Description

Length adjustable staging for LNG cargo tank {Length adjustable staging for LNG cargo tank}

The present invention relates to a special chieftain for an LNG cargo hold of which the length is extended.

Various aerial work is required in the manufacturing process of ships, and for this purpose, temporary items such as scaffolding are repeatedly installed and dismantled.

For example, an LNG cargo containment system for storing liquid cargo is provided in a ship such as an LNG FPSO or an offshore plant.

1 is a structure and a cross-sectional view of an LNG cargo hold, and FIG. 2 is a view showing an operation of a new construction unit and a chieftain installed in an LNG cargo hold.

Referring to FIG. 1, the LNG cargo hold 10 has a special thermal insulation structure (for example, a primary barrier 12 and a secondary barrier 13 inside the hull 11) to effectively withstand low temperatures. A structure to be installed) must be installed, and a lattice structure (for example, a chief structure 30) is installed in the LNG cargo hold 10 to perform related tasks. Installation of a special insulation structure for the vertical wall, ceiling, etc. of the LNG cargo hold 10 may be made using the installed temporary material.

In the case of insulation work for the LNG cargo hold 10, the following process is performed (see FIG. 2).

Step 1: Block mounting, marking, flatness check of the hull (21), welding of stud bolts (23), work of level wedge (22)

Step 2: Panel installation, foam plug (24) work, flat joint (23) work

Step 3: Work on the secondary barrier (25)

Step 4: TBP (Top Bridge Pad) (26) work, membrane sheet (27) marking, membrane sheet installation

Step 5: Welding marking sheet using welding machine 28

Step 6: Apply welding line paint, test and inspect ammonia, clean, and remove the chieftain

During such insulation work, the ends of each floor of the chief structure 30 need to be provided with a telescopic part that can be stretched to change the separation distance to the working surface of the LNG cargo hold 10 according to the detailed work performed in each step. . In this case, a chieftain, not an insulation worker, is put into a group of two and is working on the new construction.

3 is a view showing the configuration of an extension part of the chief structure.

The elastic part includes a basic body 31 extending in the horizontal direction with respect to the vertical support in the vertical direction, and a slide body 32 that slides while one end is inserted into the interior of the basic body 31 as a basic skeleton. A basic scaffold floor 34 and a slide scaffold floor 35 may be provided on an upper portion of the basic body 31 and an upper portion of the slide body 32, respectively. In addition, a guard rail 33 may be installed at the end of the slide body 32 to prevent an operator from falling. In addition, the basic body 31 may be supported to maintain a horizontal state by an inclined inclined support 36.

As shown in the upper drawing of FIG. 3, the elastic part is present in a contracted state, and as shown in the lower drawing, the slide body 32 may be stretched while sliding outward as needed.

In this case, sagging occurs due to the load at the end of the slide body 32, and as a result, line contact occurs at one end of the slide body 32 inside the basic body 31 (refer to P1 and P2).

When the elastic part needs to be contracted again during the insulation work, there is a problem that the contraction is not smoothly performed due to friction caused by line contact.

Korean Patent Laid-Open Patent No. 10-2013-0011759 (published on Jan. 30, 2013)-Aerial work table for cargo hold

An object of the present invention is to provide a special chieftain for an LNG cargo hold with a length that enables smooth extension/contraction by reducing contact friction by mitigating sagging during extension by double improving the structure of the extension part.

An object of the present invention is to provide a special chieftain for an LNG cargo hold with a length that enables smooth extension/contraction by arranging a roller in a line contact portion to reduce contact friction.

An object of the present invention is to provide a special chieftain for an LNG cargo hold with a length that enables smooth extension/contraction by reducing contact friction by applying a roller guide or a bearing guide to relieve sagging during elongation.

Objects other than the present invention will be easily understood through the following description.

According to an aspect of the present invention, as a special chieftain for an LNG cargo hold including an extension part of which the length is stretched, the extension part, an upper base body placed in a horizontal direction, and one end is inserted into the interior of the upper base body to move back and forth An upper elastic portion including an upper slide body to be; A lower extension part including a lower base body horizontally spaced apart from the upper base body by a predetermined height, and a lower slide body having one end inserted into the interior of the lower base body and moving back and forth; A first upper and lower support for supporting between the upper and lower basic bodies; And a second upper and lower support for supporting between an end of the upper slide body and an end of the lower slide body.

On the other hand, according to another aspect of the present invention, as a special chieftain for an LNG cargo hold including an extension part that extends and contracts in length, the extension part includes a basic body placed in a horizontal direction, and one end is inserted into the interior of the basic body to move back and forth. An inner roller including a slide body, wherein a part of the slide body is installed to protrude from an upper surface adjacent to an upper edge of the slide body to support the inner upper surface of the base body with clouds; And an outer roller installed at a lower edge of the outer end of the base body to support the lower surface of the slide body to support the lower surface of the slide body.

On the other hand, according to another aspect of the present invention, as a special chieftain for an LNG cargo hold including an extension part of which length is stretched, the extension part is a basic body placed in a horizontal direction, and one end is inserted into the interior of the basic body to move backward and forward. A special chieftain for an LNG cargo hold is provided, which includes a slide body, further comprising a first large roller and a second large roller respectively installed at one end of the slide body and a position spaced forward by a predetermined length from the one end.

The first large roller and the second large roller may have a diameter greater than the height of the slide body.

On the other hand, according to another aspect of the present invention, as a special chieftain for an LNG cargo hold including an extension part of which length is stretched, the extension part is a basic body placed in a horizontal direction, and one end is inserted into the interior of the basic body to move backward and forward. A first roller guide including a slide body that includes a roller and an auxiliary guide rail installed on an inner surface of the basic body; Further comprising a second roller guide including an auxiliary roller and a guide rail installed on the outer surface of the slide body to correspond to the first roller guide, the roller is guided by the guide rail, the auxiliary roller is the Special chieftains for LNG hold are provided, guided by auxiliary guide rails.

On the other hand, according to another aspect of the present invention, as a special chieftain for an LNG cargo hold including an expansion and contraction part of which length is expanded, the expansion and contraction part, a basic body placed in a horizontal direction, and one end is inserted into the interior of the basic body to move back and forth A ball bearing guide installed on the inner side of the basic body and including a slide body; Further comprising a guide body installed on the outer surface of the slide body to correspond to the ball bearing guide, the ball bearing guide is a guide rail having a structure bent in a U shape, and at least one of the upper and lower surfaces of the guide rail LNG comprising a plurality of ball bearings arranged in a row, and at least one of the upper and lower surfaces of the guide body has a plurality of concave grooves corresponding to the plurality of ball bearings or one concave groove extending in the longitudinal direction Special chieftains for cargo hold are provided.

Other aspects, features, and advantages other than those described above will become apparent from the following drawings, claims, and detailed description of the invention.

According to an exemplary embodiment of the present invention, there is an effect of reducing contact friction and enabling smooth extension/contraction by reducing the sagging phenomenon during stretching by double improving the configuration of the elastic part.

In addition, there is an effect of enabling smooth elongation/contraction by arranging a roller in a line contact portion to reduce contact friction.

In addition, by applying a roller guide or a bearing guide to alleviate sagging during elongation, contact friction is reduced, thereby enabling smooth elongation/contraction.

1 is a structure and cross-sectional view of an LNG cargo hold,
Figure 2 is a view showing the operation of the temporary construction and the chief's new contraction installed in the LNG cargo hold,
Figure 3 is a view showing the configuration of the new construction of the chief structure,
4 is a side view of a special chieftain for an LNG cargo hold whose length is expanded and contracted according to the first embodiment of the present invention,
5 is a conceptual diagram of a special chieftain for an LNG cargo hold according to a second embodiment of the present invention,
6 is a conceptual diagram of a special chieftain for an LNG cargo hold according to a third embodiment of the present invention,
7 and 8 are a three-dimensional conceptual diagram of a special chieftain for an LNG cargo hold according to a fourth embodiment of the present invention,
9 and 10 are a three-dimensional conceptual diagram of a special chieftain for an LNG cargo hold according to a fifth embodiment of the present invention.

In the present invention, various modifications may be made and various embodiments may be provided, and specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to a specific embodiment, it is to be understood to include all changes, equivalents, or substitutes included in the spirit and scope of the present invention.

The terms used in the present specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present specification, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance.

In addition, terms such as "... unit", "... unit", "... module", and "... group" described in the specification mean a unit that processes at least one function or operation, which is hardware or software or hardware and software. It can be implemented by a combination of.

4 is a side view of a special chieftain for an LNG cargo hold whose length is extended according to the first embodiment of the present invention.

The length of the LNG cargo hold special chief 100 according to the first embodiment of the present invention doubles the expansion and contraction configuration to mitigate sagging during stretching, thereby reducing contact friction and enabling smooth expansion/contraction.

The special chieftain 100 for LNG cargo holds according to this embodiment includes an upper extension part and a lower extension part. The upper elastic part includes an upper basic body 110 and an upper slide body 120, and the lower elastic part includes a lower basic body 111 and a lower slide body 121.

The upper basic body 110 extends in a horizontal direction with respect to the vertical support and is placed in a horizontal direction. The lower basic body 111 is disposed to be spaced apart from the upper basic body 110 by a predetermined height in parallel with the upper basic body 110.

The upper basic body 110 has an empty structure, so that one end of the upper slide body 120 is inserted therein and can slide. The lower basic body 111 also has an empty structure, so that one end of the lower slide body 121 can be inserted into the interior to slide.

A basic scaffold floor 140 may be installed on an upper portion of the upper basic body 110, and a slide scaffold floor 141 may be installed on an upper portion of the upper slide body 120. In addition, a guard rail 150 is installed upward at an end of the upper slide body 120 to prevent a worker from falling.

The first upper and lower supports 130 extending in the vertical direction are installed between the upper and lower basic bodies 110 and 111. The first upper and lower supports 130 may be installed between the outer ends of the upper basic body 110 and the lower basic body 111.

And between the upper slide body 120 and the lower slide body 121, a second upper and lower support 131 extending in a vertical direction is installed. The second upper and lower supports 131 may be installed between the upper slide body 120 and the outer ends of the lower slide body 121.

The first upper and lower supports 130 and the second upper and lower supports 131 have the same length, so that the distance between the upper slide body 120 and the lower slide body 121 is equal to the upper basic body 110 and the lower basic body ( 111) and keep the same distance.

In the special chieftain 100 for an LNG cargo hold according to the present embodiment, it has the same structure as that of the upper and lower double. The end of the upper slide body 120 corresponding to the free end and the end of the lower slide body 121 are interlocked by the second upper and lower supports 131, so that the slide body is stretched by double linking compared to the case where the slide body is tensioned alone. In this case, the sag phenomenon is alleviated and the frictional force caused by line contact is reduced, so that the expansion and contraction can be made more smoothly.

5 is a conceptual diagram of a special chieftain for an LNG cargo hold according to a second embodiment of the present invention. (a) is a side cross-sectional view, and (b) is a front view.

The special chieftain for LNG trucks according to the second embodiment of the present invention uses a roller to reduce frictional force due to line contact, so that the expansion and contraction of the expansion and contraction part is smoothly performed.

The special chieftain for an LNG cargo hold according to the present embodiment can be applied to both the case of having one expansion unit as shown in FIG. 3 or the case of having two expansion units as shown in FIG. 4. Hereinafter, a description will be made focusing on a case applied to one elastic part shown in FIG. 3.

When the elastic part is tensioned, a roller is installed in a portion where the base body 31 and the slide body 32 line contact.

An inner roller 210 having a predetermined diameter is installed on the upper surface of the inner end of the slide body 32 inserted into the basic body 31. In this case, a part of the inner roller 210 may be installed to protrude from the upper surface of the slide body 32. The width of the inner roller 210 may be larger than the width of the slide body 32 and smaller than the width of the inner space of the basic body 31. Accordingly, the case where the slide body 32 is shifted in the left-right direction rather than the front-rear direction can be prevented to some extent, and interference can be minimized in smooth sliding movement within the basic body 31.

Here, when the slide body 32 moves forward to the maximum and is tensioned, the upper edge of the end of the slide body 32 is the inside of the base body 31 in consideration of the expected inclination angle of the slide body 32 compared to the base body 31. It is possible to determine the installation position and diameter of the inner roller 210 so as not to contact the upper surface.

In addition, the outer roller 220 may be installed at the lower edge portion of the outer end of the basic body 31. The outer roller 220 may be rotatably supported by the roller support 230.

The outer roller 220 rolls support the lower surface of the slide body 32.

In this embodiment, by rolling support the line contact point that is expected to occur between the base body 31 and the slide body 32 through the inner roller 210 and the outer roller 220, frictional force is reduced and the slide body 32 ) Can slide smoothly.

6 is a conceptual diagram of a special chieftain for an LNG cargo hold according to a third embodiment of the present invention. (a) is a side cross-sectional view, and (b1) and (b2) are front views according to different examples.

The special chieftain for an LNG truck according to the third embodiment of the present invention also uses a roller to reduce the frictional force caused by line contact, so that the expansion and contraction of the expansion and contraction part is smoothly performed.

The special chieftain for an LNG cargo hold according to the present embodiment can be applied to both the case of having one expansion part as shown in FIG. 3 or the case of having two expansion parts as shown in FIG. 4. Hereinafter, a description will be made focusing on a case applied to one elastic part shown in FIG. 3.

When the elastic part is tensioned, a roller is installed in a portion where the base body 31 and the slide body 32 line contact.

A first large roller 310 is installed at the inner end of the slide body 32 inserted into the basic body 31. The diameter D1 of the first large roller 310 may be larger than the height H1 of the slide body 32. The upper end of the first large roller 310 may be positioned higher than the upper surface of the slide body 32, and the lower end of the first large roller 310 may be installed to be positioned lower than the lower surface of the slide body 32.

In addition, a second large roller 320 may be installed in front of a predetermined length from the inner end of the slide body 32. The diameter D2 of the second large roller 320 may also be larger than the height H1 of the slide body 32. The second large roller 320 may also be installed so that its upper end is higher than the upper surface of the slide body 32 and the lower end is lower than the lower surface of the slide body 32.

The installation position of the first large roller 310 may be a point P1 where line contact is expected in a state in which the elastic portion is maximally extended, that is, a position corresponding to the inner end of the slide body 32.

In addition, the installation position of the second large roller 320 may be a point P2 where line contact is expected in a state in which the elastic portion is maximized, that is, a position close to the lower edge of the outer end of the basic body 31 among the slide body 32. .

As shown in (b1), the first large roller 310 and the second large roller 320 have a width greater than the width of the slide body 32 and greater than the width of the inner space of the basic body 31. It can be small. Accordingly, a case where the slide body 32 is shifted in the left-right direction rather than the front-rear direction can be prevented to some extent, and interference can be minimized in smooth sliding movement within the basic body 31.

Alternatively, as shown in (b2), the first large roller 310 and the second large roller 320 may have a disk shape attached to the side surface of the slide body 32.

In this embodiment, the sliding body 32 reduces friction by rolling support the line contact point that is expected to occur between the base body 31 and the slide body 32 through a pair of large rollers 310 and 320 Can smoothly slide and move.

7 and 8 are three-dimensional conceptual diagrams of a special chieftain for an LNG cargo hold according to a fourth embodiment of the present invention.

The special chief 400 for an LNG cargo hold according to the fourth embodiment of the present invention reduces the contact friction by mitigating the sagging phenomenon during stretching through a roller guide structure, thereby enabling smooth stretching/contraction.

The LNG cargo hold special chief 400 according to this embodiment has a basic body 31 installed with a first roller guide 410 including a roller 411 and an auxiliary guide rail 413 on the inner surface, and on the outer surface. It includes a slide body 32 on which a second roller guide 420 including an auxiliary roller 421 and a guide rail 423 is installed.

The first roller guide 410 includes a roller 411 provided at an outer end of the inner surface of the basic body 31. The roller 411 is guided by a guide rail 423 installed on the outer surface of the slide body 32.

The second roller guide 420 includes an auxiliary roller 421 provided at an inner end of the outer surface of the slide body 32. The auxiliary roller 421 is guided by the auxiliary guide rail 413 installed on the inner surface of the basic body 31.

The auxiliary guide rail 413 is a structure bent in a U shape having an upper surface, a side surface, and a lower surface, and the auxiliary roller 421 may guide the auxiliary roller 421 so that it can be moved forward and backward.

A fitting groove 415 is formed at the outer end of the upper surface of the auxiliary guide rail 413, so that the auxiliary roller 421 of the second roller guide 420 is fitted to the rear side of the roller 411, and then the auxiliary guide rail 413 ) To follow. In addition, it is possible to facilitate the installation and separation of the slide body 32 through the fitting groove 415.

The guide rail 423 may have a structure that is bent in a shape of a shape having an upper surface and a side surface. The upper surface of the guide rail 423 is supported by rollers 411 so that the slide body 32 can smoothly move back and forth.

When the slide body 32 is installed in the basic body 31, the upper surface of the guide rail 423 is located below the upper surface of the auxiliary guide rail 413, so that the self-weight of the slide body 32 is extended to the maximum. When a sagging phenomenon occurs, it is possible to prevent excessive sagging of the slide body 32.

9 and 10 are three-dimensional conceptual diagrams of a special chieftain for an LNG cargo hold according to a fifth embodiment of the present invention.

The special chieftain 500 for LNG cargo holds according to the fifth embodiment of the present invention reduces the contact friction by mitigating the sag during elongation through a bearing guide structure, thereby enabling smooth elongation/contraction.

The special chieftain 500 for an LNG hold according to the present embodiment includes a basic body 31 having a ball bearing guide 510 installed on an inner surface thereof, and a slide body 32 having a guide body 520 installed on an outer surface thereof. .

The ball bearing guide 510 includes a guide rail 511 having a structure bent in a U shape having an upper surface, a side surface, and a lower surface. A plurality of ball bearings 513 may be arranged in a line on the upper and/or lower surfaces of the guide rail 511.

On the upper surface and/or the lower surface of the guide body 520 installed on the slide body 32, a plurality of concave grooves corresponding to a plurality of ball bearings 513 may be formed, or a concave groove extending long in the longitudinal direction may be formed. have.

The ball bearing 513 may support the guide body 520 by rolling to minimize frictional force when the slide body 32 moves back and forth.

A stopper 515 may be provided at an outer end of the guide rail 511. The stopper 515 has an elastic member such as a spring installed therein, so that pressure can be applied toward the inner surface of the combined slide body 32. Therefore, after the slide body 32 moves back and forth by an external force and sliding is completed, pressure is applied in a direction crossing the moving direction, so that when the external force is removed, the slide body 32 is prevented from shaking so that it is firmly fixed. I can.

In this embodiment, even when the slide body 32 is maximally elongated due to the combination of the ball bearing guide 510 and the guide body 520, the sagging phenomenon due to its own weight can be somewhat alleviated.

Although the above has been described with reference to embodiments of the present invention, those of ordinary skill in the relevant technical field variously modify the present invention within the scope not departing from the spirit and scope of the present invention described in the following claims. And it will be appreciated that it can be changed.

100: special chieftain for LNG hold 110: upper basic body
111: lower basic body 120: upper slide body
121: lower slide body 130: first upper and lower support
131: second upper and lower supports 140: basic scaffold floor
141: slide scaffold floor 150: guard rail
210: inner roller 220: outer roller
230: roller support 310, 320: large roller
400: special chieftain for LNG hold 410: first roller guide
411: roller 413: auxiliary guide rail
415: fitting groove 420: second roller guide
421: auxiliary roller 423: guide rail
500: special chieftain for LNG hold 510: ball bearing guide
511: guide rail 513: ball bearing
515: stopper 520: guide body

Claims (6)

As a special chieftain for LNG cargo holds that includes an extension part that extends and contracts in length,
The elastic part,
An upper elastic part including an upper basic body placed in a horizontal direction and an upper slide body having one end inserted into the interior of the upper basic body and moving back and forth;
A lower extension part including a lower base body horizontally spaced apart from the upper base body by a predetermined height, and a lower slide body having one end inserted into the interior of the lower base body and moving back and forth;
A first upper and lower support for supporting between the upper and lower basic bodies; And
Special chieftain for LNG cargo holds comprising a second upper and lower support for supporting between the end of the upper slide body and the end of the lower slide body. As a special chieftain for LNG cargo holds that includes an extension part that extends and contracts in length,
The elastic part includes a basic body placed in a horizontal direction, and a slide body having one end inserted into the interior of the basic body and moving back and forth,
An inner roller partially protruding from an upper surface adjacent to an upper edge of the slide body to support the inner upper surface of the basic body by rolling; And
A special chieftain for an LNG cargo hold further comprising an outer roller installed at a lower edge of the outer end of the base body to support the lower surface of the slide body. As a special chieftain for LNG cargo holds that includes an extension part that extends and contracts in length,
The elastic part includes a basic body placed in a horizontal direction, and a slide body having one end inserted into the interior of the basic body and moving back and forth,
A special chieftain for an LNG cargo hold further comprising a first large roller and a second large roller respectively installed at one end of the slide body and a position spaced forward by a predetermined length from the one end. The method of claim 3,
The first large roller and the second large roller have a diameter greater than the height of the slide body. As a special chieftain for LNG cargo holds that includes an extension part that extends and contracts in length,
The elastic part includes a basic body placed in a horizontal direction, and a slide body having one end inserted into the interior of the basic body and moving back and forth,
A first roller guide including a roller and an auxiliary guide rail installed on an inner surface of the basic body;
Further comprising a second roller guide including an auxiliary roller and a guide rail installed on the outer surface of the slide body to correspond to the first roller guide,
The roller is guided by the guide rail, and the auxiliary roller is guided by the auxiliary guide rail. As a special chieftain for LNG cargo holds that includes an extension part that extends and contracts in length,
The elastic part includes a basic body placed in a horizontal direction, and a slide body having one end inserted into the interior of the basic body and moving back and forth,
A ball bearing guide installed on the inner side of the basic body;
Further comprising a guide body installed on the outer surface of the slide body to correspond to the ball bearing guide,
The ball bearing guide includes a guide rail having a structure bent in a U shape, and a plurality of ball bearings arranged in line on at least one of an upper surface and a lower surface of the guide rail,
At least one of the upper and lower surfaces of the guide body is formed with a plurality of concave grooves corresponding to the plurality of ball bearings or a single concave groove extending in the longitudinal direction is formed for a special chieftain for LNG cargo hold.

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