CN214057843U

CN214057843U - Liquefied gas carrier

Info

Publication number: CN214057843U
Application number: CN202023183994.5U
Authority: CN
Inventors: 陈兴长; 李兰珀; 丁秋桐
Original assignee: China International Marine Containers Group Co Ltd; CIMC Enric Investment Holdings Shenzhen Co Ltd; Nantong CIMC Sinopacific Ocean Offshore and Engineering Co Ltd
Current assignee: China International Marine Containers Group Co Ltd; CIMC Enric Investment Holdings Shenzhen Co Ltd; Nantong CIMC Sinopacific Ocean Offshore and Engineering Co Ltd
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2021-08-27
Anticipated expiration: 2030-12-25

Abstract

The utility model provides a liquefied gas carrier. The liquefied gas carrier comprises a deck, a coaming and a low temperature prevention coating. The coaming is vertically arranged on the deck; the surrounding plate is circumferentially closed, a first area is formed on the inner side of the surrounding plate, and a second area is formed on the outer side of the surrounding plate. The low temperature resistant coating is applied to the deck surface in the first area and to the interior surface of the shroud. A loading and unloading pipeline mounted on the deck; the loading and unloading pipeline comprises a pipeline and a connecting piece, the pipeline is connected through the connecting piece, and the connecting piece is located in the first area. The utility model discloses in, the low temperature coating is prevented in the first regional deck surface coating, can avoid the direct drippage of low temperature liquefied gas that the connecting piece leaked to the deck, destroys the deck. The connection is located in the first area, which ensures that the first area covers all leakage points. The first area is coated with the low-temperature-resistant coating, the deck can be protected without additionally arranging other components, and the low-temperature-resistant coating has the advantages of simple structure and convenience in construction.

Description

Liquefied gas carrier

Technical Field

The utility model relates to a boats and ships field, in particular to liquefied gas carrier.

Background

A liquefied gas carrier is a ship for carrying liquefied gas. The liquefied gas carrier is mainly classified into a Liquefied Natural Gas (LNG) carrier, a Liquefied Petroleum Gas (LPG) carrier, and a Liquefied Ethylene (LEG) carrier according to the design temperature of transported goods, and the design temperatures of the liquefied natural gas carrier, the liquefied petroleum gas carrier, and the liquefied ethylene carrier are-163 ℃, -48 ℃, and-104 ℃. Due to the low design temperature, the liquefied gas ship not only has special design for the cargo system, but also the ship system is required to be protected under extreme conditions. According to the requirements of 2018 version of OCIMF (International maritime Forum of oil companies), a deck needs to be protected in a header area of a liquefied gas carrier, and low-temperature liquefied gas is prevented from leaking onto the deck to be frozen and hurt to the deck when loading and unloading goods, so that the deck structure is prevented from being damaged. In the prior art, an integrated stainless steel liquid collecting disc is usually added in a loading and unloading station area to collect leaked liquefied gas so as to play a role in protecting a deck, but the scheme has high cost, long manufacturing period and large difficulty in integral hoisting and installation.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the regional deck of liquefied gas carrier loading and unloading station and have the problem that is damaged by the low temperature liquefied gas that leaks.

In order to solve the technical problem, the utility model adopts the following technical scheme:

according to an aspect of the present invention, the utility model provides a liquefied gas carrier, include: a deck; the coaming is vertically arranged on the deck; the surrounding plate is circumferentially closed, a first area is formed on the inner side of the surrounding plate, and a second area is formed on the outer side of the surrounding plate; the low-temperature-resistant coating is coated on the surface of the deck in the first area and the inner surface of the coaming; a loading and unloading pipeline mounted on the deck; the loading and unloading pipeline comprises a pipeline and a connecting piece, the pipeline is connected through the connecting piece, and the connecting piece is located in the first area.

In some embodiments, the shroud extends at least 150 millimeters in height beyond the low temperature resistant coating of the deck surface.

In some embodiments, the shroud is a carbon steel plate.

In some embodiments, the low temperature resistant coating is a low temperature resistant paint coating or a low temperature resistant paint coating.

In some embodiments, the low temperature resistant coating comprises a plurality of layers, each of the layers being of a different material.

In some embodiments, the low temperature resistant coating is further coated on the outer surface of the coaming and the deck surface in the second region, and the low temperature resistant coating is distributed along the circumference of the coaming in the second region.

In some embodiments, the low temperature resistant coating in the second region is a low temperature resistant paint coating or a low temperature resistant paint coating

In some embodiments, there are four surrounding plates, which are respectively a first surrounding plate, a second surrounding plate, a third surrounding plate and a fourth surrounding plate, the first surrounding plate, the second surrounding plate, the third surrounding plate and the fourth surrounding plate are connected in sequence and are circumferentially enclosed and sealed, and the inner sides of the first surrounding plate, the second surrounding plate, the third surrounding plate and the fourth surrounding plate form the first region; the first enclosing plate is opposite to the loading and unloading pipeline and is attached to a ship board; the second enclosing plate is arranged opposite to the first enclosing plate; the third enclosing plate is perpendicular to the first enclosing plate and is positioned on one side of the loading and unloading pipeline; the fourth enclosing plate and the third enclosing plate are arranged in parallel and are positioned on the other side of the loading and unloading pipeline.

In some embodiments, the distance between the connector and the second shroud is no less than 500 mm; the distance between the inner side of the loading and unloading pipeline close to the third enclosing plate and the third enclosing plate is not less than 1500 mm; the distance between the inner side of the loading and unloading pipeline close to the fourth enclosing plate and the fourth enclosing plate is not less than 1500 mm.

In some embodiments, the connector comprises a flange, a bolt.

According to the above technical scheme, the utility model discloses following advantage and positive effect have at least:

the utility model discloses in, the liquefied gas carrier includes deck, bounding wall, prevents low temperature coating and loading and unloading pipeline, and loading and unloading pipeline installation is on the deck for carry low temperature liquefied gas. The loading and unloading pipeline comprises pipelines and connecting pieces, the pipelines are connected through the connecting pieces, and the connecting pieces have the risk of leakage of the low-temperature liquefied gas. The coaming is erected and is circumferentially closed, a first area is formed on the inner side of the coaming, the surface of the deck in the first area and the inner surface of the coaming are coated with a low-temperature-resistant coating, the low-temperature-resistant coating is low in heat conductivity coefficient and good in heat insulation effect, and low-temperature liquefied gas leaked from the connecting piece can be prevented from directly dripping on the deck to damage the deck. The connection is located in the first area, which ensures that the first area covers all leakage points. The enclosing plate is vertically arranged, so that leaked low-temperature liquefied gas is collected in the first area, the leaked low-temperature liquefied gas can be prevented from flowing into the second area, the enclosing plate can possibly contact the leaked low-temperature liquefied gas, and a low-temperature-preventing coating is coated on the inner surface of the enclosing plate to protect the enclosing plate. The coating prevents that low temperature coating need not additionally to add other components can protect the deck, has simple structure, construction convenience's advantage.

Drawings

Fig. 1 is a schematic structural diagram of a liquefied gas carrier according to an embodiment of the present invention, and mainly illustrates the structures of a loading and unloading pipeline and a deck.

Fig. 2 is a top view of the loading and unloading pipe and deck of fig. 1.

The reference numerals are explained below:

100. a liquefied gas carrier;

1. a deck; 11. a first region; 12. a second region; 2. enclosing plates; 21. a first enclosing plate; 22. a second enclosing plate; 23. a third coaming; 24. a fourth coaming; 3. a low temperature resistant coating; 4. loading and unloading pipelines; 41. A pipeline; 42. a connecting member; 5. a side outer plate; 6. liquid accumulation plate.

Detailed Description

Exemplary embodiments that embody features and advantages of the present invention will be described in detail in the following description. It is to be understood that the invention is capable of other and different embodiments and its several details are capable of modification without departing from the scope of the invention, and that the description and drawings are to be regarded as illustrative in nature and not as restrictive.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

For further explanation of the principles and construction of the present invention, reference will now be made in detail to the preferred embodiments of the present invention, which are illustrated in the accompanying drawings.

The utility model provides a liquefied gas carrier 100, liquefied gas carrier 100 is a ship for shipping liquefied gas.

Referring to fig. 1 and 2, the present embodiment provides a liquefied gas carrier 100, where the liquefied gas carrier 100 includes a deck 1, a skirt 2, a low temperature prevention coating 3, and a loading/unloading pipeline 4.

The deck 1 is a steel plate on a beam, and in the structure of the ship, the deck 1 is used for covering the space in the ship and providing support for equipment mounted thereon. The specific structure of the deck 1 can be referred to the related art.

The loading and unloading lines 4 are for transporting liquefied gas at low temperature, and the loading and unloading lines 4 are normally mounted on the deck 1. The specific structure of the loading and unloading line 4 can be referred to the related art.

The loading and unloading line 4 comprises a pipe 41 and a connection 42. The single pipe 41 has a limited length, and thus, the two pipes 41 communicating with each other are connected to each other using the connection member 42. The connection 42 risks leaking liquefied gas at low temperature due to the high pressure in the conduit 41. In the present embodiment, the connection member 42 includes flanges and bolts, and the flange connection between the pipes 41 and the bolt connection between the pipes 41 can be referred to in the related art. In other embodiments, a threaded or welded connection between the pipe 41 and the pipe 41 is used, which still presents a risk of leakage.

The coaming 2 is arranged upright on the deck 1. The coaming 2 can be carbon steel plate, can adopt welded connection between coaming 2 and the deck 1, and coaming 2 circumference is sealed, separates into two regions with deck 1, is located coaming 2 inboard be first region 11, is located coaming 2 outside be second region 12. In some embodiments, a bleed plug (not shown) is provided on the shroud 2 for draining rainwater collected in the first region 11.

The first region 11 covers all the connections 42 of the loading and unloading line 4. Since the cryogenic liquefied gas in the conduit 41 has a higher pressure, the connection 42 may risk leaking cryogenic liquefied gas, which is at a lower temperature and may damage the deck 1. The surrounding plate 2 is circumferentially closed, so that the peripheral side of the first area 11 is closed, and the connecting piece 42 positioned in the first area 11 cannot flow out of the first area 11 even if low-temperature liquefied gas leaks, and the deck 1 outside the first area 11 is prevented from being damaged in a large area.

Referring to fig. 2 in conjunction with fig. 1, in the present embodiment, the enclosing plates 2 include four enclosing plates, which are a first enclosing plate 21, a second enclosing plate 22, a third enclosing plate 23 and a fourth enclosing plate 24. The first enclosing plate 21, the second enclosing plate 22, the third enclosing plate 23 and the fourth enclosing plate 24 are connected in sequence and enclosed and sealed along the circumferential direction. The first shroud 21 is positioned against the side of the vessel and the first shroud 21 is positioned opposite the loading and unloading lines 4. in some embodiments, the first shroud 21 is replaced by an outer side plate 5. The second enclosing plate 22 is opposite to the first enclosing plate 21, the second enclosing plate 22 is close to the loading and unloading pipeline 4, and the distance L1 between the connecting piece 42 and the second enclosing plate 22 is not less than 500 mm. The third enclosing plate 23 is perpendicular to the first enclosing plate 21, the third enclosing plate 23 is positioned at the left side of the loading and unloading pipeline 4, and the distance L2 between the loading and unloading pipeline 4 and the third enclosing plate 23 is not less than 1500 mm. The fourth apron 24 is parallel to the third apron 23, the fourth apron 24 is located at the right side of the loading and unloading pipeline 4, and the distance L3 between the fourth apron 24 and the loading and unloading pipeline 4 is not less than 1500 mm. The area enclosed by the first enclosing plate 21, the second enclosing plate 22, the third enclosing plate 23 and the fourth enclosing plate 24 is the protection area of the deck 1 required by the 2018 version of OCIMF. In other embodiments, the number of the surrounding plates 2 may be three or more than five, and when the surrounding plates 2 are three, the surrounding plates 2 surround a triangular area, and the area surrounded by the triangular area covers the protection area required by the OCIMF. When the number of the surrounding plates 2 is five or more, all the surrounding plates 2 can be enclosed into a rectangular area or an irregular area, and the area enclosed by the surrounding plates 2 covers the protection area required by the OCIMF.

Referring to fig. 1 and 2, the low temperature resistant coating 3 is applied to the surface of the deck 1 and the inner surface of the coaming 2 in the first area 11. The low temperature prevention coating 3 has low heat conductivity, good heat insulation and low temperature resistance. The low-temperature liquefied gas leaked from the connecting piece 42 drops on the surface of the low-temperature-resistant coating 3, so that the low-temperature liquefied gas can be prevented from dropping on the deck 1 and being in direct contact with the deck 1, and the deck 1 is protected. The inner surface of the coaming 2 is coated with the low temperature-resistant coating 3, so that the coaming 2 can be prevented from contacting with leaked liquefied gas, and the coaming 2 is protected.

The low temperature prevention coating 3 can be a low temperature prevention paint coating or a low temperature resistant paint coating, and the low temperature prevention coating 3 forms a laminated structure through spraying or blade coating. The low-temperature-resistant paint is coated on the surface of the deck 1 of the first area 11 and the inner surface of the coaming 2 through a spraying or scraping process to form the low-temperature-resistant coating 3. In some preferred embodiments, the low temperature prevention coating 3 is formed of one material. In the present embodiment, the low temperature prevention coating 3 is formed by spraying low temperature prevention paint of Chartek 1620 CSP. In other embodiments, the low temperature prevention coating 3 may include a plurality of layers, each of which is made of a different material, that is, the low temperature prevention coating 3 may be formed by spraying a plurality of different grades of low temperature-resistant paint in layers, and at the same time, the low temperature prevention coating 3 may be formed by spraying a plurality of different grades of low temperature-resistant paint in layers. The low temperature resistant coating 3 is formed by coating a plurality of materials in layers, and the same material forms a layer. Specifically, when the low-temperature-resistant coating 3 is formed by coating two grades of low-temperature-resistant paint in layers, one grade of low-temperature-resistant paint is coated on the surface of the deck 1 to form a layer of layers, the other grade of low-temperature-resistant paint is coated on the surface of the layer, and the two layers are laminated to form the low-temperature-resistant coating 3.

The spraying thickness of the low temperature resistant coating 3 is calculated according to a heat conduction formula. Specifically, taking an lng carrier as an example, the temperature of the transported lng is-160 ℃, the design temperature for normal operation of the deck 1 is 0 ℃, the spraying thickness of the low temperature prevention coating 3 is such that the leaked lng is insulated by the low temperature prevention coating 3, and the temperature of the leaked lng conducted to the deck 1 is higher than or equal to the design temperature. When the temperature transferred to the deck 1 is equal to the design temperature, the thickness is the minimum thickness of the low temperature prevention coating 3, and the spraying thickness of the low temperature prevention coating 3 is greater than or equal to the minimum thickness to meet the use requirement.

In the prior art, a low-temperature liquefied gas liquid collecting tray 6 for collecting leakage is generally provided on the liquefied gas carrier 100. The drip tray 6 is typically mounted below the loading and unloading pipe 4, and the drip tray 6 is typically mounted on the deck 1. The liquid accumulation plate 6 has a groove for collecting the leaked liquefied low temperature gas, and the specific structure of the liquid accumulation plate 6 can be referred to the related art. In some embodiments, the area of the deck 1 occupied by the liquid accumulation tray 6 is not sprayed with the anti-cold coating 3, and the liquid accumulation tray 6 can protect the deck 1 of the area occupied by the liquid accumulation tray 6 from being contacted with leaked liquefied low-temperature gas because the liquid accumulation tray 6 is positioned above the deck 1. The area of the deck 1 occupied by the liquid accumulation plate 6 is not sprayed with the low temperature prevention coating 3, so that low temperature prevention paint or low temperature resistant coating can be saved.

The spraying thickness of the low-temperature-resistant coating 3 on the inner surface of the coaming 2 is also determined according to a heat conduction formula and the design temperature of the coaming 2. The coaming 2 needs to exceed the low temperature resistant coating 3 on the surface of the deck 1 by at least 150 mm in the height direction so as to meet the requirements of OCIMF. In this embodiment, the inner surface of the coaming 2 is completely coated with the low temperature-resistant coating 3, in other embodiments, when the height of the coaming 2 is high, the low temperature-resistant coating 3 sprayed on the inner surface of the coaming 2 is sprayed upwards from the bottom of the coaming 2, and the low temperature-resistant coating 3 sprayed on the inner surface of the coaming 2 exceeds the surface of the low temperature-resistant coating 3 on the surface of the deck 1 by 150 mm in the height direction, so as to reduce the usage amount of the low temperature-resistant paint.

In the present embodiment, the low temperature prevention coating 3 is only coated on the surface of the deck 1 of the first area 11 and the inner surface of the coaming 2, in other embodiments, the low temperature prevention coating 3 is also coated on the outer surface of the coaming 2 and the surface of the deck 1 of the second area 12, the low temperature prevention coating 3 is distributed in the second area 12 along the circumferential direction of the coaming 2, and the width thereof is selected according to actual requirements. The low temperature resistant coating 3 on the outer surface of the shroud 2 and the low temperature resistant coating 3 in the second region 12 may be a low temperature resistant paint coating or a low temperature resistant paint coating. The material of the low temperature resistant coating 3 in the second region 12 and the material of the low temperature resistant coating 3 on the outer surface of the shroud 2 may be the same as the material of the low temperature resistant coating 3 in the first region 11. The spraying height and the spraying thickness of the low temperature prevention coating 3 on the outer surface of the coaming 2 can be the same as those of the low temperature prevention coating 3 on the inner surface of the coaming 2. The sprayed thickness of the low temperature prevention coating 3 in the second region 12 may be referred to the sprayed thickness of the low temperature prevention coating 3 in the first region 11. The low-temperature-resistant coating 3 is sprayed on the outer surfaces of the second area 12 and the enclosure 2, so that a buffer area can be formed outside the enclosure 2 to prevent the low-temperature liquefied gas from flowing out of the first area 11 to damage the deck 1 of the second area 12.

Based on the above description, the working principle of the liquefied gas carrier 100 of the present application when in use is roughly: the liquefied gas carrier 100 includes a deck 1, a skirt 2, a low temperature prevention coating 3, and a loading and unloading pipeline 4, and the loading and unloading pipeline 4 is installed on the deck 1 and used for conveying low temperature liquefied gas. The loading and unloading pipeline 4 comprises pipelines 41 and connecting pieces 42, the pipelines 41 are connected through the connecting pieces 42, the connecting pieces 42 have the risk of leaking low-temperature liquefied gas, and the leaked low-temperature liquefied gas has low temperature and can directly contact with the deck 1 to damage the deck 1. The coaming 2 is erected on the deck 1 and is circumferentially closed, a first area 11 is formed on the inner side of the coaming 2, the surface of the deck 1 of the first area 11 and the inner surface of the coaming 2 are coated with a low-temperature-resistant coating 3, the low-temperature-resistant coating 3 is low in heat conductivity coefficient and good in heat insulation effect, and low-temperature liquefied gas leaked from the connecting piece 42 can be prevented from directly dropping on the deck 1 to damage the deck 1. The location of the connection 42 in the first region 11 ensures that the first region 11 covers all leakage points. The enclosure 2 is vertically arranged, so that leaked low-temperature liquefied gas is collected in the first area 11 and can be prevented from flowing into the second area 12, and the enclosure 2 is protected from being damaged by the leaked low-temperature liquefied gas by coating the low-temperature-resistant coating 3 on the inner surface of the enclosure 2. The first area 11 is coated with the low-temperature-resistant coating 3, the deck 1 can be protected without additionally arranging other components, and the low-temperature-resistant coating has the advantages of simple structure and convenience in construction.

While the present invention has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims

1. A liquefied gas carrier, comprising:

a deck;

the coaming is vertically arranged on the deck; the surrounding plate is circumferentially closed, a first area is formed on the inner side of the surrounding plate, and a second area is formed on the outer side of the surrounding plate;

the low-temperature-resistant coating is coated on the surface of the deck in the first area and the inner surface of the coaming;

a loading and unloading pipeline mounted on the deck; the loading and unloading pipeline comprises a pipeline and a connecting piece, the pipeline is connected through the connecting piece, and the connecting piece is located in the first area.

2. The liquefied gas carrier as claimed in claim 1, wherein the skirt is located at least 150 mm in height above the low temperature resistant coating on the deck surface.

3. The liquefied gas carrier as claimed in claim 2, wherein the shroud is a carbon steel plate.

4. The liquefied gas carrier as claimed in claim 1, wherein the low temperature prevention coating layer is a low temperature prevention paint coating layer or a low temperature resistant paint coating layer.

5. The liquefied gas carrier as claimed in claim 1, wherein the low temperature prevention coating layer includes a plurality of layers, each of which is made of a different material.

6. The liquefied gas carrier as claimed in claim 1, wherein the low temperature prevention coating is further applied to an outer surface of the shroud and a deck surface in the second region, the low temperature prevention coating being distributed along a circumferential direction of the shroud in the second region.

7. Liquefied gas carrier as claimed in claim 6, characterized in that the low temperature prevention coating in the second region is a low temperature prevention paint coating or a low temperature resistant paint coating.

8. The liquefied gas carrier as claimed in any one of claims 1 to 7, wherein there are four of the surrounding plates, namely a first surrounding plate, a second surrounding plate, a third surrounding plate and a fourth surrounding plate, the first surrounding plate, the second surrounding plate, the third surrounding plate and the fourth surrounding plate are connected in sequence and are enclosed along the circumferential direction, and the first region is formed inside the first surrounding plate, the second surrounding plate, the third surrounding plate and the fourth surrounding plate; the first enclosing plate is opposite to the loading and unloading pipeline and is attached to a ship board;

the second enclosing plate is arranged opposite to the first enclosing plate;

the third enclosing plate is perpendicular to the first enclosing plate and is positioned on one side of the loading and unloading pipeline;

the fourth enclosing plate and the third enclosing plate are arranged in parallel and are positioned on the other side of the loading and unloading pipeline.

9. The liquefied gas carrier as claimed in claim 8, wherein a distance between the connector and the second shroud is not less than 500 mm;

the distance between the inner side of the loading and unloading pipeline close to the third enclosing plate and the third enclosing plate is not less than 1500 mm;

the distance between the inner side of the loading and unloading pipeline close to the fourth enclosing plate and the fourth enclosing plate is not less than 1500 mm.

10. Liquefied gas carrier as claimed in any of claims 1-7, characterized in that the connection comprises flanges, bolts.