KR20210110913A - A vent mast - Google Patents

Abstract

The present invention provides a vent mast, comprising: a fixed pipe connected to a fuel tank provided in a hull and disposed to be protruded from the upper part of the hull; an elevating pipe connected to communicate with the upper part of the fixed pipe and provided to be able to elevate from the fixed pipe; and a driving unit for raising the elevating pipe to discharge a boil-off gas in the fuel tank to the outside through the elevating pipe when the pressure in the fuel tank increases by more than a certain level. In the present invention, the vent mast, specifically, the upper pipe of the vent mast is configured to be able to elevate. When the boil-off gas is discharged, by raising the upper pipe of the vent mast to a predetermined height above a cabin, the boil-off gas can be discharged at a location spaced a predetermined height from the top of the cabin. Thus, the vent mast can promote the safety of crewmen in the cabin.

Description

Vent Mast {A VENT MAST}

The present invention relates to a vent mast, and more particularly, to a vent mast installed in a ship.

In general, a ship is a means of transport that carries a large amount of minerals, crude oil, natural gas, or thousands of container boxes and sails the ocean. move through

Such ships generate thrust by driving an engine by receiving fuel from a fuel tank. Recently, as environmental problems arise, ships using liquefied gas such as LNG are widely used as fuel.

At this time, in the case of a fuel tank or a storage tank in which liquefied gas is stored in a ship, BOG (Boiled Off Gas) is continuously generated for various reasons such as sloshing of the liquefied gas and incomplete insulation. Since the internal pressure increases, when a certain pressure (eg, 0.3 bar) is exceeded, the safety valve operates for safety, and some of the boil-off gas in the fuel tank is discharged to the outside through the vent mast.

On the other hand, in the case of a container ship using liquefied gas as a fuel, the residence where the crew lives can be arranged in the central part of the hull to secure the visibility of the control room, and for efficient space utilization, the residence area where it is difficult to load the container box A fuel tank may be disposed in the lower space.

In such a container ship, the container box must be loaded by maximizing the cargo hold and the space above the hull in the hull, and a vent mast connected to the fuel tank is installed so that the boil-off gas in the fuel tank can be discharged immediately in an emergency situation. It can be installed vertically along the living quarters arranged on the upper part.

However, since the vent mast having such a structure may discharge BOG to the periphery of the residence when BOG is discharged, BOG may flow into the residence, which poses a problem for the safety of the crew and causes explosions caused by various electronic equipment. There are problems that can cause accidents.

Registered Patent No. 10-1532035 (Registration date: June 22, 2015) "Integrated vent mast structure"

In the present invention, the vent mast, specifically, the upper pipe of the vent mast is configured to be elevating, and when the boil-off gas is discharged, the upper pipe of the vent mast is raised to a predetermined height above the dwelling, thereby increasing the height from the top of the dwelling to a predetermined height. It is intended to provide a vent mast that can discharge the boil-off gas at a spaced apart location to promote the safety of crew members in the living quarters.

The technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description. will be able

In order to solve the above problems, the present invention is connected to a fuel tank provided in the hull, and is connected to a fixed pipe protruding from the upper part of the hull, connected to communicate with the upper part of the fixed pipe, and elevating and lowering from the fixed pipe Provided is a vent mast including a lifting pipe and a driving unit for raising the elevating pipe to discharge the boil-off gas in the fuel tank to the outside through the elevating pipe when the pressure in the fuel tank increases by more than a certain level.

In addition, the fixed pipe is vertically connected from the fuel tank and is disposed along the side of the residence provided on the upper part of the hull, and the elevating pipe is raised to a predetermined height above the residence by the driving unit when the BOG is discharged, and from the top of the residence. It provides a vent mast for discharging boil-off gas at positions spaced apart by a predetermined height.

In addition, it provides a vent mast further comprising a bellows-type connection pipe that is telescopically connected between the fixed pipe and the elevating pipe.

In addition, the driving unit provides a vent mast including a winch unit having a wire connected to the elevating pipe and winding or unwinding the wire to elevate the elevating pipe from the fixed pipe.

In addition, the driving unit provides a vent mast including a cylinder member for elevating the elevating pipe from the fixed pipe through the cylinder rod contracted or extended from the cylinder body.

In addition, a damper provided inside the fixed pipe, which opens the fixed pipe only when the elevating pipe rises from the fixed pipe, and an exhaust fan provided inside the elevating pipe and rotating to discharge the boil-off gas to the outside further comprising A vent mast is provided.

The vent mast according to an embodiment of the present invention is vertically connected from the fuel tank in the hull and disposed along the side of the habitable port, and when the pressure in the fuel tank increases, the upper lifting pipe of the vent mast is installed at a predetermined height from the top of the vent. By raising it, it is possible to discharge BOG (Boiled Off Gas) flowing in from the fuel tank at a position spaced a predetermined height from the top of the residence, and through this, it is possible to prevent the BOG from flowing into the residence or its surroundings. can ensure the safety of

The effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description. will be.

1 shows a side view of a ship equipped with a vent mast according to an embodiment of the present invention.
FIG. 2 is a front sectional view of the ship shown in FIG. 1 .
Figure 3 shows the arrangement structure of the vent mast in the ship according to an embodiment of the present invention.
4 shows the configuration of a vent mast according to an embodiment of the present invention.
5 illustrates another example of a driving unit provided in the vent mast according to an embodiment of the present invention.
6 is a diagram illustrating the configuration of a damper and an exhaust fan provided in the vent mast according to an embodiment of the present invention.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

DETAILED DESCRIPTION The detailed description set forth below in conjunction with the appended drawings is intended to describe exemplary embodiments of the present invention and is not intended to represent the only embodiments in which the present invention may be practiced.

In order to clearly explain the present invention in the drawings, parts irrelevant to the description may be omitted, and the same reference numerals may be used for the same or similar components throughout the specification.

In an embodiment of the present invention, expressions such as “or” and “at least one” may indicate one of the words listed together, or a combination of two or more.

1 shows a side view of a ship 1 equipped with a vent mast 100 according to an embodiment of the present invention, and FIG. 2 shows a front sectional view of the ship 1 shown in FIG. , Figure 3 shows the arrangement structure of the vent mast 100 in the ship (1) according to an embodiment of the present invention.

Prior to the description, the vent mast 100 according to an embodiment of the present invention is a vent mast 100 applied to the ship 1, and is used as a gas fuel as a representative embodiment, and cargo such as a container box (c). A description will be given of the vent mast 100 that can be easily applied to the gas fuel propulsion container ship 1 for loading.

Here, the gas fuel may be used to encompass all liquefied gas fuels that are generally stored in a liquid state, such as LNG, LPG, ethylene, ammonia, etc. In this embodiment, an example using LNG gas will be described as an example. .

1 to 3 , the ship 1 provided with the vent mast 100 according to the present embodiment has a hull 10 , an engine 20 , a fuel tank 30 , and a fuel supply line 40 . and a vent mast 100 .

The hull 10 forms the exterior of the gas fuel propulsion container ship 1, and is surrounded by an upper deck, a side shell plate and a bottom plate, and a spherical bow is formed in the bow in the front-rear direction, and a propulsion device such as a propeller 22 in the stern. and a steering device such as a rudder may be provided.

A plurality of container boxes (c) may be loaded inside the hull 10, and for this purpose, a plurality of cargo holds 11 may be provided inside the hull 10 in the front-rear direction, and the cells in the cargo hold 11 A guide (not shown) may be provided to guide the loading of the container box (c).

In addition, a bulkhead (not shown) may be provided in the cargo hold 11 , and a plurality of bays constituting the cargo hold 11 may be partitioned through the bulkhead (not shown).

In addition, in the cargo hold 11, each step 12 in the form of a step may be formed in the lower left and right to load the container box (c) as much as possible.

In addition, a hatch coaming 13 may be provided on the upper portion of the cargo hold 11 .

That is, referring to FIG. 2 , a hatch for loading and unloading cargo or a person is formed in the container ship 1 , and also the hatch entrance to prevent the intrusion of waves into the dock of the ship 1 , etc. A hatch coaming 13 which is a bulkhead may be installed around it.

Furthermore, a horizontal plate 14a provided horizontally on the upper side of the side wall of the hatch coaming 13 to support the hatch cover 15, and a vertical plate 14b connected to the lower side of the side end of the horizontal plate 14a to reinforce longitudinal strength ) may be provided with a hatch coaming top plate 14 in the form of "a".

Here, the hatch cover 15 supported by the horizontal plate 14a is provided to cover the hatch from the upper portion of the hatch coaming 13 , and a plurality of container boxes c may be loaded onto the hatch cover 15 .

In the case of the container ship (1), in order to maximize the cargo loading capacity, the space and the machine room where the engine 20, the fuel tank 30 are installed, and the living area 50 where the sailors live, the engine room 21 are installed. A plurality of container boxes (c) can be loaded on the inside and upper deck of the hull 10 except for the back.

The engine 20 may be provided in the engine room 21 adjacent to the stern side in the interior of the hull 10 to provide propulsion power of the ship 1 .

That is, the engine 20 for propulsion of the vessel is accommodated in the engine room 21 , and the engine 20 is mechanically or electrically connected to the propeller 22 to consume gas fuel and rotate the propeller 22 . have.

In addition, an engine casing 60 may be provided in the upper portion of the engine room 21 , the engine casing 60 having a stack for discharging exhaust generated from the engine 20 to the outside, and an emergency generator or fire extinguishing facility It is also possible to form a space in which the back is provided.

The fuel tank 30 may store liquefied gas fuel such as LNG, and may be spaced apart from the engine 20 at the stern side and disposed at the lower portion of the housing 50 in the central portion of the hull 10 .

At this time, the liquefied gas may be stored in a liquefied state in the fuel tank 30 , and may be supplied to the engine 20 through the fuel supply line 40 to be consumed as a propulsion fuel for operating the container ship 1 . .

To this end, the fuel tank 30 may store the liquefied gas in a cryogenic state, and in order to minimize the natural vaporization of the liquefied gas and the change into the boil-off gas, the fuel tank 30 may employ various insulating structures.

In addition, a dome may be provided on the upper portion of the fuel tank 30 , and a fuel supply line 40 may be connected to the dome.

Such a fuel tank 30 may be disposed directly below the residence 50 and may be surrounded by a cofferdam (not shown).

That is, since the fuel tank 30 is a configuration for accommodating hazardous substances, a cofferdam (not shown) is formed around the fuel tank 30 in order to implement thermal insulation while protecting the housing 50 and the like from the fuel tank 30 . ) may be enclosed.

Here, the upper deck of the central part of the hull 10 may be provided with a residence 50 in which a sailor resides. can

That is, in order to secure a view of the control room in the container ship 1, the residence 50 may be disposed in the central part of the hull 10, and thus it is difficult to load the container box c for efficient space utilization. A fuel tank 30 may be disposed in the lower space of the sphere 50 .

The fuel supply line 40 connects between the engine 20 and the fuel tank 30 arranged to be spaced apart from each other in the hull 10 , so that the fuel stored in the fuel tank 30 can be supplied to the engine 20 . .

Such a fuel supply line 40 protrudes above the hull 10 so as to bypass the cargo hold 11 in the hull 10 on which the container box c is loaded. can be placed.

That is, since the container ship 1 must load the container box c by maximally utilizing the cargo hold 11 and the upper space of the hull 10 in the hull 10, the fuel supply line 40 in the cargo hold 11 If there is not enough space to place a fuel supply line 40 in the cargo hold 11, a pipe passage through a separate structure to prevent and protect collision or interference with the heavy container box (c) By making the , there is a problem in that the loading efficiency decreases and the cost increases.

Accordingly, in order to increase the loading efficiency of the container box (c) in the hull 10, the fuel supply line 40 connected between the engine 20 and the fuel tank 30 is protruded to the upper part of the hull 10. By accommodating and arranging inside the top plate 14 of the hatch coaming 13 installed on the upper part of the hull 10, interference with the container box c in the cargo hold 11 can be prevented, and the loading space can be increased. and can safely protect the fuel supply line 40 from the outside.

Specifically, the fuel supply line 40 extends vertically from the fuel tank 30 to the hatch coaming 13 of the upper part of the hull 10 , and is bent at the extended end along the inner side of the hatch coaming top plate 14 . It extends horizontally and is bent at the extended end to be vertically connected to the engine 20 , so that it can be formed to bypass the cargo hold 11 in the hull 10 .

Meanwhile, referring to FIG. 3 , the vent mast 100 is connected to the fuel tank 30 and is vertically disposed along the side of the living hole 50 to discharge gas to the upper side of the living hole 50 .

Specifically, the vent mast 100 is vertically disposed along the side of the living port 50 from the fuel tank 30 so as to avoid the space in which the container box c is loaded in the hull 10, and the vent mast (100) The exhaust port (p) of the end may be disposed at the top of the residence port (50).

Since the fuel tank 30 in which the liquefied gas is stored continuously generates BOG (Boiled Off Gas) as time passes, and this increases the pressure inside the fuel tank 30, a certain pressure (eg, 0.3 bar) is exceeded, a safety valve (not shown) of the fuel tank 30 may operate, and some of the boil-off gas in the fuel tank 30 may be discharged to the outside through the vent mast 100 .

At this time, when BOG is discharged to the vicinity of the residence 50 through the vent mast 100 , BOG may flow into the residence 50 , which poses a problem to the safety of the crew and causes explosions caused by various electronic equipment. Since it may cause an accident, in this embodiment, the upper pipe of the vent mast 100 is configured to be elevating, and when the boil-off gas is discharged, the upper pipe of the vent mast 100 is moved to the upper side of the residence 50 . Safety can be achieved by raising it to a predetermined height.

Figure 4 shows the configuration of the vent mast 100 according to an embodiment of the present invention.

Referring to FIG. 4 , the vent mast 100 according to the present embodiment may include a fixed pipe 110 , a lifting pipe 120 , and a driving unit 130 .

Here, the fixed pipe 110 may be vertically connected from the fuel tank 30 and disposed along the side surface of the living port 50 .

In addition, the elevating pipe 120 may be connected to the upper end of the fixed pipe 110 to be provided so as to be able to elevate from the fixed pipe (110).

Accordingly, the boil-off gas flowing in from the fuel tank 30 may pass through the fixed pipe 110 and be discharged to the outside through the elevating pipe 120 .

At this time, the upper end of the fixed pipe 110 is provided up to the vicinity of the uppermost part of the residence port 50 , and the elevating pipe 120 is provided so as to be able to elevate from the fixed pipe 110 by the driving unit 130 , and is usually provided for residence. It is disposed on the upper end of the fixed pipe 110 at the top of the sphere 50, and when the boil-off gas is discharged, it is raised to a predetermined height upward of the residence port 50 by the driving unit 130 and the exhaust port of the end of the elevating pipe 120 BOG can be discharged to the outside through (p).

In addition, in this embodiment, the elevating pipe 120 is disposed at a predetermined interval on one side of the fixed pipe 110, and a predetermined length such as a bellows pipe having elasticity between the fixed pipe 110 and the elevating pipe 120 is selected. By connecting the connecting pipe 140 having, the leakage of boil-off gas can be effectively prevented, and the lifting pipe 120 can be easily raised and lowered without interference of the fixed pipe 110 .

When the elevating pipe 120 is directly connected to the upper end of the fixed pipe 110 in a sliding manner, a gap may be formed between the fixed pipe 110 and the elevating pipe 120, so that leakage of boil-off gas may occur. There, it is preferable to connect the flexible connector 140 between the fixed pipe 110 and the elevating pipe 120 .

Furthermore, by providing a gas detection unit 150 inside the fixed pipe 110 , it is possible to detect gas leakage.

The driving unit 130 may raise and lower the lifting pipe 120 from the fixed pipe 110 by interworking with a pressure measuring unit (not shown) provided in the fuel tank 30 .

Specifically, in the fuel tank 30 , when the pressure in the tank increases above a predetermined pressure preset by the pressure measuring unit (not shown), a safety valve (not shown) is opened and the boil-off gas in the fuel tank 30 is fixed in the pipe. (110) may be introduced.

At this time, the driving unit 130 interlocks with the pressure measuring unit (not shown), and when the pressure in the tank increases above a predetermined pressure preset by the pressure measuring unit (not shown), at the upper position of the residence port 50 . It is possible to automatically raise the elevating pipe 120 from the fixed pipe 110 to discharge the boil-off gas.

Here, a control unit 160 connected through an electric wire or the like may be provided between the driving unit 130 and the pressure measuring unit (not shown), and the control unit 160 according to a measurement signal of the pressure measuring unit (not shown). may operate the driving unit 130 .

In addition, the control unit 160 is connected to the gas detection unit 150 provided inside the fixed pipe 110 , and when leaking gas is detected through the gas detection unit 150 , an alarm in the machine room or the cockpit of the ship 1 , etc. can give

As an example, referring to FIG. 4 , the driving unit 130 includes a wire w connected to the elevating pipe 120 and winding or unwinding the wire w to remove the elevating pipe 120 from the fixed pipe 110 . It may include a winch unit 131 for elevating and lowering.

At this time, in this embodiment, a pulley part 132 installed to be spaced apart from the upper side of the residence 50 by a support or the like is provided, and the wire w connected to the elevating pipe 120 is connected to the pulley part 132 . It is possible to hang the wire (w) through the winch unit 131 and unwind or unwind the elevating pipe 120 from the fixed pipe 110 to the upper side of the residence port 50 or lower toward the residence port 50 .

In addition, when the winch unit 131 is installed to be spaced a predetermined height above the residence 50 by a support, etc., the lifting pipe 120 is directly connected from the fixed pipe 110 through the wire w. 50) may be lifted upwards or lowered toward the residence (50).

Accordingly, when the pressure in the tank increases above a predetermined pressure by the pressure measuring unit (not shown) in the fuel tank 30 , the driving unit 130 operates the winch unit ( By elevating the elevating pipe 120 from the fixed pipe 110 through 131), it is possible to discharge the boil-off gas flowing from the fuel tank 30 at a position spaced a predetermined height from the top of the residence 50, and through this It is possible to promote the safety of the residence 50 .

In addition, FIG. 5 shows another example of the driving unit 130' provided in the vent mast 100 according to an embodiment of the present invention.

Referring to FIG. 5 , in this embodiment, the driving unit 130 ′ may include a cylinder member 133 installed at the top of the residence port 50 to elevate the lifting pipe 120 from the fixed pipe 110 . have.

Specifically, the cylinder member 133 includes a cylinder body 134 vertically installed on the uppermost part of the housing 50 , contracted or extended from the cylinder body 134 , and a lifting pipe 120 from the fixed pipe 110 . It may include a cylinder rod 135 to elevate.

At this time, the cylinder member 133 may be formed of a pneumatic cylinder or a hydraulic cylinder.

Such a driving unit 130 ′ operates according to the control of the control unit 160 when the pressure in the tank increases above a predetermined pressure by a pressure measuring unit (not shown) in the fuel tank 30 , By extending the cylinder rod 135 from the cylinder body 134 in the vertical direction to raise the elevating pipe 120 from the fixed pipe 110 , the fuel tank 30 is spaced from the top of the housing 50 by a predetermined height. ) can be discharged from the inflow of boil-off gas.

Meanwhile, the vent mast 100 according to an embodiment of the present invention may further include a damper 170 and an exhaust fan 180 .

6 is a view showing the configuration of the damper 170 and the exhaust fan 180 provided in the vent mast 100 according to an embodiment of the present invention.

Referring to FIG. 6 , a damper 170 may be installed inside the fixed pipe 110 of the vent mast 100 , and an exhaust fan 180 may be installed inside the elevating pipe 120 .

In this case, the damper 170 and the exhaust fan 180 may be removed by the control unit 160 .

Specifically, the damper 170 closes the fixed pipe 110 , and the lifting pipe 120 rises from the fixed pipe 110 by the driving unit 130 , and is spaced a predetermined height from the top of the residence 50 . By operating to open the fixed pipe 110, it is possible to prevent the boil-off gas from leaking to the vicinity of the residence 50.

In addition, the exhaust fan 180 operates to rotate when the damper 170 opens the fixed pipe 110 , so that the boil-off gas can be easily discharged from the elevating pipe 120 .

Furthermore, in the process of discharging the boil-off gas through the exhaust port (p) of the end of the lifting pipe 120 by providing a motion sensor (not shown) interlocking with the exhaust fan 180 at the upper portion of the residence 50, the motion When the movement of a crew member is detected in the vicinity by a sensor (not shown), the exhaust fan 180 may be operated for the safety of the crew member to urgently discharge the boil-off gas.

As described above, the vent mast 100 according to the embodiment of the present invention is vertically connected from the fuel tank 30 in the hull 10 and is disposed along the side surface of the living port 50, and the fuel tank ( 30) When the internal pressure increases, by raising the upper lifting pipe 120 of the vent mast 100 to a predetermined height from the top of the residence 50, the fuel at a position spaced apart from the top of the residence 50 by a predetermined height BOG (Boiled Off Gas) flowing in from the tank 30 can be discharged, thereby preventing the BOG from flowing into the residence 50 or its surroundings, thereby promoting the safety of the crew.

Embodiments of the present invention disclosed in the present specification and drawings are merely provided for specific examples in order to easily explain the technical contents of the present invention and help the understanding of the present invention, and are not intended to limit the scope of the present invention.

Therefore, the scope of the present invention should be construed as including all changes or modifications derived based on the technical spirit of the present invention in addition to the embodiments disclosed herein are included in the scope of the present invention.

1: ship 10: hull
20: engine 30: fuel tank
40: fuel supply line 50: residence
60: engine casing 100: vent mast
110: fixed pipe 120: elevating pipe
130: driving unit 140: connector
150: gas detection unit 160: control unit
130: damper 140: exhaust fan

Claims (6)

a fixed pipe connected to the fuel tank provided in the hull and disposed to protrude from the upper part of the hull;
an elevating pipe connected to communicate with an upper portion of the fixed pipe and provided to be able to elevate from the fixed pipe; and
and a driving unit for raising the elevating pipe to discharge the boil-off gas in the fuel tank to the outside through the elevating pipe when the pressure in the fuel tank increases by more than a certain level.
The method of claim 1,
The fixed pipe is vertically connected from the fuel tank and disposed along the side of the living port provided on the upper part of the hull,
When the BOG is discharged, the lifting pipe is raised to a predetermined height above the residence by the driving unit, and the vent mast discharges BOG at a position spaced apart from the top of the residence by a predetermined height.
The method of claim 1 .
The vent mast further comprising a bellows-type connector flexibly connected between the fixed pipe and the elevating pipe.
The method of claim 1 .
The drive unit,
A vent mast comprising a winch unit having a wire connected to the elevating pipe and winding or unwinding the wire to elevate the elevating pipe from the fixed pipe.
The method of claim 1 .
The drive unit,
A vent mast comprising a cylinder member for elevating the elevating pipe from the fixed pipe through a cylinder rod that is contracted or extended from the cylinder body.
The method of claim 1,
a damper provided inside the fixed pipe to open the fixed pipe only when the elevating pipe rises from the fixed pipe; and
The vent mast further comprising an exhaust fan provided inside the lifting pipe and rotating to discharge the boil-off gas to the outside.

Images