WO2018100999A1 - Vent pipe installation structure for ship - Google Patents
Vent pipe installation structure for ship Download PDFInfo
- Publication number
- WO2018100999A1 WO2018100999A1 PCT/JP2017/040374 JP2017040374W WO2018100999A1 WO 2018100999 A1 WO2018100999 A1 WO 2018100999A1 JP 2017040374 W JP2017040374 W JP 2017040374W WO 2018100999 A1 WO2018100999 A1 WO 2018100999A1
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- WO
- WIPO (PCT)
- Prior art keywords
- vent pipe
- pipe installation
- liquefied gas
- ship
- gas tank
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B11/00—Interior subdivision of hulls
- B63B11/04—Constructional features of bunkers, e.g. structural fuel tanks, or ballast tanks, e.g. with elastic walls
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
- B63J2/02—Ventilation; Air-conditioning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
- B63J2/02—Ventilation; Air-conditioning
- B63J2/08—Ventilation; Air-conditioning of holds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
- B63J2/02—Ventilation; Air-conditioning
- B63J2/10—Ventilating-shafts; Air-scoops
Definitions
- the present invention relates to a ship that can use liquefied gas as a fuel, and more particularly to an installation structure of a vent pipe for suppressing an increase in pressure in a liquefied gas tank that stores liquefied gas fuel.
- the tank is provided with a vent device, and is configured to suppress the pressure increase in the tank.
- the vent device has a vent pipe communicating with the liquefied gas tank and a pressure relief valve provided in the middle of the vent pipe, and the vent pipe projects upward from the exposure deck. At the upper end of the vent pipe, a discharge port for releasing the gas phase gas into the atmosphere is provided.
- the structure which provided the pressure relief valve above the tank is disclosed by patent document 1.
- Venting device outlets must be set to a specified height or higher from the exposed deck from the viewpoint of safety for workers on the exposed deck. Therefore, when the exposed deck is located higher than other ships, such as car carriers and passenger ships, the vent device discharge port is at the highest position of the hull structure and the air draft (the hull structure on the exposed deck) The distance from the highest position of the object to the water surface) tends to increase, which causes a problem that the route is restricted. Therefore, it is conceivable to set the height of the exposed deck low, but this causes a problem that the cargo and fuel loading space is reduced and the transportation efficiency is lowered.
- the object of the present invention is to provide a vent pipe installation structure and a ship that secures safety on the exposed deck without increasing the air draft and does not reduce the transport efficiency of the ship.
- a vent pipe installation structure for a ship includes a liquefied gas tank for storing liquefied gas fuel, a vent pipe connected to the liquefied gas tank, extending upward and projecting from a vent pipe installation portion formed on an exposed deck, and a vent Provided at the upper end of the pipe, and a discharge port for releasing the gas phase gas in the liquefied gas tank to the atmosphere, the vent pipe installation part is recessed from the surrounding exposed deck, and the discharge port is an upper structure or It is characterized by being set at a position lower than the highest part of the fitting.
- the height from the discharge port to the bottom surface of the vent pipe installation part is determined to be B / 3 (B is the full width of the ship) or 6 m, whichever is greater.
- the vent pipe installation part opens, for example, on the upper side of the ship and on the shore side or the stern side.
- the vent pipe installation part is a rectangular parallelepiped space, for example.
- the ship according to the present invention is provided with a liquefied gas tank for storing liquefied gas fuel, a vent pipe connected to the liquefied gas tank, extending upward and projecting from a vent pipe installation portion formed on an exposed deck, and provided at an upper end of the vent pipe. And an exhaust port for releasing the gas phase gas in the liquefied gas tank to the atmosphere, the vent pipe installation part is recessed from the exposed deck, and the exhaust port is provided on the exposed deck It is characterized by having a vent pipe installation structure defined at a position lower than the highest part of the object or fitting.
- FIG. 1 It is a side view which shows typically the vent pipe installation structure of the motor vehicle carrier to which 1st Embodiment of this invention is applied. It is a top view of the motor vehicle carrier shown in FIG. It is a perspective view which shows an example of the structure of a vent pipe installation part. It is the cross-sectional view which looked at the bow side in the liquefied gas tank of the motor vehicle carrier shown in FIG. It is a side view which shows typically the vent pipe installation structure of the motor vehicle carrier to which 2nd Embodiment of this invention is applied.
- FIG. 1 shows an automobile carrier to which a first embodiment of the present invention is applied, and an upper structure 11 having a vehicle deck for mounting a vehicle is provided on the upper deck 10.
- This automobile carrier can use liquefied gas fuel, and a liquefied gas tank 13 for storing the liquefied gas fuel is disposed near the bottom of the hull 12.
- the liquefied gas tank 13 is disposed so as to extend along the longitudinal direction of the hull 12.
- a vent pipe 14 is connected to the liquefied gas tank 13. The vent pipe 14 extends upward and protrudes through the upper deck 10 and the exposed deck 15.
- a discharge port 16 for releasing the gas phase gas in the liquefied gas tank 13 into the atmosphere is provided, and the vent pipe 14 has a vent valve (not shown) for opening and closing the pipe line.
- the discharge port 16 is determined to be at a position lower than the highest portion of the upper structure 11.
- the upper structure 11 includes a residential area 17 and an engine exhaust gas outlet 18 provided on the exposed deck 15, and a fitting 19 such as a radar provided on the upper surface of the residential area 17. That is, in the illustrated example, the distance A from the top of the fitting 19 to the water surface is an air draft, and the top of the discharge port 16 is lower than the air draft.
- the vent pipe installation part 20 which is a part through which the vent pipe 14 penetrates the exposed deck 15, is formed by recessing a part of the exposed deck 15 from its surroundings. Is done. Specifically, the bottom surface 21 of the vent pipe installation part 20 is at a position lower than the surrounding exposed deck 15 and the height H from the top surface of the discharge port 16 to the bottom surface 21 is B / 3 (B is the hull. 12) or 6m, whichever is greater, the outlet 16 is positioned higher than the surrounding exposed deck 15. Further, the position of the vent pipe installation part 20 in the longitudinal direction of the hull 12 is in a range from the front end to the rear end of the liquefied gas tank 13.
- the vent pipe installation part 20 is located on the port side of the hull 12 and near the center of the hull.
- the exposed deck 15 includes a garage deck 22, a first deck 23, and a second deck, and the second deck is a bottom surface 21 of the vent pipe installation portion 20.
- the residential area 17 is provided on the upper side of the garage deck 22 and on the bow side (right side in the figure).
- FIG. 3 shows the structure of the vent pipe installation part 20.
- the vent pipe installation part 20 is a rectangular parallelepiped space, and is open to the heel side 24 side and upward.
- the shape of the vent pipe installation portion 20 is merely an example, and the bottom surface 21 may be inclined so as to be lower as it is closer to the heel side 24, and the side wall 25 is also inclined so as to expand upward. Also good.
- the vent pipe installation part 20 may be formed in a cylindrical shape so that the side wall 25 has a semicircular shape when viewed from above, or may be a triangular column-shaped space so as to exhibit a triangle when viewed from above.
- the surrounding pedestrian and work area be outside the spherical space having a radius of 6 m with the discharge port 16 as the center.
- the space itself of the vent pipe installation part 20 has a shape larger than the radius 6 m with the discharge port 16 as the center.
- a pair of liquefied gas tanks 13 are provided, and these liquefied gas tanks 13 are arranged in the width direction of the hull 12.
- the vent pipe 14 is connected to the top of each liquefied gas tank 13, extends horizontally in the port direction, extends upward in the vicinity of the side 24, and protrudes from the vent pipe installation portion 20.
- the outlet 16 should be sufficiently spaced from the garage deck 22 and the walkway (not shown) and work area (not shown) on the first deck 23. It is necessary, and the discharge port 16 is arranged so as to be separated from the walkway by a distance d1 of 6 m or more.
- the distance d1 is a radius of a sphere with the discharge port 16 as the center.
- the opening of the residential area 17, the engine exhaust gas outlet 18, the air intake port, the air exhaust port, the work area, the control place, and other non-hazardous places has a radius of 10 m centering on the exhaust port 16. It is determined not to be arranged in the spherical space of d2.
- a part of the exposed deck 15 is recessed to form the vent pipe installation portion 20. Therefore, the height position of the discharge port 16 can be suppressed, the distance from the discharge port 16 to the water surface does not become an air draft, and does not affect the route selection of the car carrier. Moreover, since the recessed part of the vent pipe installation part 20 is provided only in a part of the exposed deck 15, the reduction of the cargo loading space of the upper structure 11 can be minimized. Furthermore, even if it is ships, such as a motor vehicle carrier ship in which the exposure deck 15 is a comparatively high position, it becomes easy to utilize liquefied gas fuel and can suppress environmental pollution.
- the discharge port 16 is a position 6 m or more away from the walkway and the work area, and also the residential area 17, the engine exhaust gas outlet 18, the air intake, the air discharge port, the work area, the control place, It is installed at a position more than 10m away from other non-hazardous locations.
- the vent pipe installation part 20 is opened on the tub side 24 side and upward so that the gas discharged from the discharge port 16 does not stay. Therefore, even if the internal pressure of the liquefied gas tank 13 rises and the gas phase gas is ejected from the discharge port 16, the influence on the hull and human body can be prevented. Such an effect is significant in the configuration in which the bottom surface 21 of the vent pipe installation portion 20 is inclined toward the heel side.
- FIG. 5 shows a second embodiment.
- the difference from the first embodiment is that the vent pipe installation portion 20 is provided in the stern part, and other configurations are basically the same as those of the first embodiment.
- the vent pipe installation part 20 is a space that opens to the stern side, the anchor side, and upward.
- the liquefied gas tank 13 is disposed near the center of the hull 12, and the vent pipe 14 extends horizontally from the top of the liquefied gas tank 13 in the stern direction and extends upward at the stern.
- the same effect as that of the first embodiment can be obtained.
- the openings are opened in three directions, it is possible to more reliably prevent the gas from staying in the vent pipe installation portion 20.
- the car carrier includes an RO-RO ship.
- the present invention is not limited to a car carrier, but can also be applied to a passenger ship, and can be applied to a ship other than a car carrier or a passenger ship as long as the superstructure is larger than a normal ship.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
This vent pipe 14 is connected to a liquified gas tank 13 for storing liquified gas fuel, and extends upward and protrudes from a vent pipe installation portion 20 which is formed on an exposed deck 15. An exhaust port 16 is provided at the top end of the vent pipe 14 and ejects the vapor-phase gas in the liquified gas tank to the atmosphere. The vent pipe installation portion 20 is recessed more than the surrounding exposed deck 15. The exhaust port 16 is set at a position lower than the highest portion of an upper structure 11 or outfitting.
Description
本発明は、液化ガスを燃料として使用可能な船舶に関し、特に液化ガス燃料を貯留する液化ガスタンク内の圧力上昇を抑制するためのベント管の設置構造に関する。
The present invention relates to a ship that can use liquefied gas as a fuel, and more particularly to an installation structure of a vent pipe for suppressing an increase in pressure in a liquefied gas tank that stores liquefied gas fuel.
近年、液化ガス燃料を使用可能な船舶が提案されている。この船舶では、液化ガス燃料を貯留する液化ガスタンク内の圧力が上昇すると、タンクが損傷するおそれが生じるので、タンクにはベント装置が設けられ、タンク内の圧力上昇を抑制するように構成されている。ベント装置は、液化ガスタンクに連通するベント管と、ベント管の途中に設けられた圧力逃し弁とを有し、ベント管は曝露甲板から上方へ突出する。ベント管の上端には、気相ガスを大気中に放出するための排出口が設けられている。なお、液化ガスを収容するタンク内の圧力上昇を抑えるためにタンクの上方に圧力逃し弁を設けた構成が特許文献１に開示されている。
In recent years, ships that can use liquefied gas fuel have been proposed. In this ship, if the pressure in the liquefied gas tank that stores the liquefied gas fuel increases, the tank may be damaged. Therefore, the tank is provided with a vent device, and is configured to suppress the pressure increase in the tank. Yes. The vent device has a vent pipe communicating with the liquefied gas tank and a pressure relief valve provided in the middle of the vent pipe, and the vent pipe projects upward from the exposure deck. At the upper end of the vent pipe, a discharge port for releasing the gas phase gas into the atmosphere is provided. In addition, in order to suppress the pressure rise in the tank which accommodates liquefied gas, the structure which provided the pressure relief valve above the tank is disclosed by patent document 1. FIG.
ベント装置の排出口は、曝露甲板上の作業員に対する安全性の観点から、曝露甲板から規定の高さ以上に定めなければならない。したがって、自動車運搬船や客船のように曝露甲板が他の船舶よりも高い位置に設けられている場合、ベント装置の排出口が船体構造物の最も高い位置となり、エアドラフト（曝露甲板上の船体構造物の最も高い位置から水面までの距離）が大きくなる傾向にあり、これにより航路が制限されるという問題が生じる。そこで曝露甲板の高さを低く定めることが考えられるが、これによると貨物や燃料の積載スペースが減少し、輸送効率が低下するという問題が生じる。
ベ ン ト Venting device outlets must be set to a specified height or higher from the exposed deck from the viewpoint of safety for workers on the exposed deck. Therefore, when the exposed deck is located higher than other ships, such as car carriers and passenger ships, the vent device discharge port is at the highest position of the hull structure and the air draft (the hull structure on the exposed deck) The distance from the highest position of the object to the water surface) tends to increase, which causes a problem that the route is restricted. Therefore, it is conceivable to set the height of the exposed deck low, but this causes a problem that the cargo and fuel loading space is reduced and the transportation efficiency is lowered.
本発明は、エアドラフトを増加させることなく、曝露甲板上の安全性を確保し、かつ船舶の輸送効率を低下させることのないベント管設置構造および船舶を提供することを目的としている。
The object of the present invention is to provide a vent pipe installation structure and a ship that secures safety on the exposed deck without increasing the air draft and does not reduce the transport efficiency of the ship.
本発明に係る船舶のベント管設置構造は、液化ガス燃料を貯留する液化ガスタンクと、液化ガスタンクに接続されて上方に延び、曝露甲板に形成されたベント管設置部から突出するベント管と、ベント管の上端に設けられ、液化ガスタンク内の気相ガスを大気中に放出するための排出口とを備え、ベント管設置部が周囲の曝露甲板よりも凹陥し、かつ排出口が上部構造物または艤装品の最も高い部位よりも低い位置に定められることを特徴としている。
A vent pipe installation structure for a ship according to the present invention includes a liquefied gas tank for storing liquefied gas fuel, a vent pipe connected to the liquefied gas tank, extending upward and projecting from a vent pipe installation portion formed on an exposed deck, and a vent Provided at the upper end of the pipe, and a discharge port for releasing the gas phase gas in the liquefied gas tank to the atmosphere, the vent pipe installation part is recessed from the surrounding exposed deck, and the discharge port is an upper structure or It is characterized by being set at a position lower than the highest part of the fitting.
好ましくは、排出口からベント管設置部の底面までの高さが、Ｂ／３（Ｂは船舶の全幅）または６ｍのうちいずれか大きい方の値以上に定められる。ベント管設置部は例えば船舶の上方と舷側または船尾側に開口する。また、ベント管設置部は例えば直方体状の空間である。液化ガスタンクが船舶の船体の長手方向に沿って延びるように配置されている場合、ベント管設置部の長手方向における位置が液化ガスタンクの前端から後端までの範囲にあることが好ましい。
Preferably, the height from the discharge port to the bottom surface of the vent pipe installation part is determined to be B / 3 (B is the full width of the ship) or 6 m, whichever is greater. The vent pipe installation part opens, for example, on the upper side of the ship and on the shore side or the stern side. The vent pipe installation part is a rectangular parallelepiped space, for example. When the liquefied gas tank is arranged so as to extend along the longitudinal direction of the hull of the ship, the position of the vent pipe installation portion in the longitudinal direction is preferably in the range from the front end to the rear end of the liquefied gas tank.
本発明に係る船舶は、液化ガス燃料を貯留する液化ガスタンクと、液化ガスタンクに接続されて上方に延び、曝露甲板に形成されたベント管設置部から突出するベント管と、ベント管の上端に設けられ、液化ガスタンク内の気相ガスを大気中に放出するための排出口とを備え、ベント管設置部が周囲の曝露甲板よりも凹陥し、かつ排出口が曝露甲板上に設けられた上部構造物または艤装品の最も高い部位より低い位置に定められるベント管設置構造を有することを特徴としている。
The ship according to the present invention is provided with a liquefied gas tank for storing liquefied gas fuel, a vent pipe connected to the liquefied gas tank, extending upward and projecting from a vent pipe installation portion formed on an exposed deck, and provided at an upper end of the vent pipe. And an exhaust port for releasing the gas phase gas in the liquefied gas tank to the atmosphere, the vent pipe installation part is recessed from the exposed deck, and the exhaust port is provided on the exposed deck It is characterized by having a vent pipe installation structure defined at a position lower than the highest part of the object or fitting.
本発明によれば、エアドラフトを増加させることなく、曝露甲板上の安全性を確保し、かつ船舶の輸送効率を低下させることのないベント管設置構造および船舶を得ることができるという効果が得られる。
According to the present invention, it is possible to obtain a vent pipe installation structure and a ship that can ensure safety on the exposed deck without increasing the air draft and that do not reduce the transportation efficiency of the ship. It is done.
以下、図示された実施形態に基づいて本発明を説明する。
図１は本発明の第１実施形態を適用した自動車運搬船を示し、上甲板１０の上側には、車両を搭載するための車両甲板を有する上部構造物１１が設けられる。この自動車運搬船は液化ガス燃料を使用可能であり、船体１２の船底の近傍には、液化ガス燃料を貯留するための液化ガスタンク１３が配置される。液化ガスタンク１３は船体１２の長手方向に沿って延びるように配置される。液化ガスタンク１３にはベント管１４が接続され、ベント管１４は上方に延び、上甲板１０と曝露甲板１５を貫通して突出する。 Hereinafter, the present invention will be described based on illustrated embodiments.
FIG. 1 shows an automobile carrier to which a first embodiment of the present invention is applied, and anupper structure 11 having a vehicle deck for mounting a vehicle is provided on the upper deck 10. This automobile carrier can use liquefied gas fuel, and a liquefied gas tank 13 for storing the liquefied gas fuel is disposed near the bottom of the hull 12. The liquefied gas tank 13 is disposed so as to extend along the longitudinal direction of the hull 12. A vent pipe 14 is connected to the liquefied gas tank 13. The vent pipe 14 extends upward and protrudes through the upper deck 10 and the exposed deck 15.
図１は本発明の第１実施形態を適用した自動車運搬船を示し、上甲板１０の上側には、車両を搭載するための車両甲板を有する上部構造物１１が設けられる。この自動車運搬船は液化ガス燃料を使用可能であり、船体１２の船底の近傍には、液化ガス燃料を貯留するための液化ガスタンク１３が配置される。液化ガスタンク１３は船体１２の長手方向に沿って延びるように配置される。液化ガスタンク１３にはベント管１４が接続され、ベント管１４は上方に延び、上甲板１０と曝露甲板１５を貫通して突出する。 Hereinafter, the present invention will be described based on illustrated embodiments.
FIG. 1 shows an automobile carrier to which a first embodiment of the present invention is applied, and an
ベント管１４の上端には、液化ガスタンク１３内の気相ガスを大気中に放出するための排出口１６が設けられ、ベント管１４には、管路を開閉するベント弁（図示せず）が設けられる。排出口１６は、上部構造物１１の最も高い部位よりも低い位置になるように定められる。ここで上部構造物１１は、曝露甲板１５の上に設けられた居住区１７および機関排ガス出口１８と、居住区１７の上面に設けられたレーダー等の艤装品１９とを含む。すなわち図示例では、艤装品１９の最上部から水面までの距離Ａがエアドラフトであり、排出口１６の最上部はエアドラフトよりも低い。
At the upper end of the vent pipe 14, a discharge port 16 for releasing the gas phase gas in the liquefied gas tank 13 into the atmosphere is provided, and the vent pipe 14 has a vent valve (not shown) for opening and closing the pipe line. Provided. The discharge port 16 is determined to be at a position lower than the highest portion of the upper structure 11. Here, the upper structure 11 includes a residential area 17 and an engine exhaust gas outlet 18 provided on the exposed deck 15, and a fitting 19 such as a radar provided on the upper surface of the residential area 17. That is, in the illustrated example, the distance A from the top of the fitting 19 to the water surface is an air draft, and the top of the discharge port 16 is lower than the air draft.
一方、曝露甲板１５上の安全性を確保するため、ベント管１４が曝露甲板１５を貫通する部位であるベント管設置部２０は、曝露甲板１５の一部を、その周囲よりも凹陥させて形成される。具体的には、ベント管設置部２０の底面２１は、その周囲の曝露甲板１５よりも低い位置にあり、排出口１６の上面から底面２１までの高さＨは、Ｂ／３（Ｂは船体１２の全幅）または６ｍのうちのいずれか大きい方の値以上に定められ、排出口１６は周囲の曝露甲板１５より高い位置となる。またベント管設置部２０の船体１２の長手方向における位置は、液化ガスタンク１３の前端から後端までの範囲にある。
On the other hand, in order to ensure safety on the exposed deck 15, the vent pipe installation part 20, which is a part through which the vent pipe 14 penetrates the exposed deck 15, is formed by recessing a part of the exposed deck 15 from its surroundings. Is done. Specifically, the bottom surface 21 of the vent pipe installation part 20 is at a position lower than the surrounding exposed deck 15 and the height H from the top surface of the discharge port 16 to the bottom surface 21 is B / 3 (B is the hull. 12) or 6m, whichever is greater, the outlet 16 is positioned higher than the surrounding exposed deck 15. Further, the position of the vent pipe installation part 20 in the longitudinal direction of the hull 12 is in a range from the front end to the rear end of the liquefied gas tank 13.
図２に示すように、ベント管設置部２０は船体１２の左舷側であって船体中央部付近に位置している。曝露甲板１５は、ガレージデッキ２２と、第１甲板２３と、第２甲板からなり、第２甲板はベント管設置部２０の底面２１である。居住区１７は、ガレージデッキ２２の上面であって船首側（図の右方）に設けられる。
As shown in FIG. 2, the vent pipe installation part 20 is located on the port side of the hull 12 and near the center of the hull. The exposed deck 15 includes a garage deck 22, a first deck 23, and a second deck, and the second deck is a bottom surface 21 of the vent pipe installation portion 20. The residential area 17 is provided on the upper side of the garage deck 22 and on the bow side (right side in the figure).
図３はベント管設置部２０の構造を示している。この例では、ベント管設置部２０は直方体状の空間であり、舷側２４側と上方に開口している。このベント管設置部２０の形状は一例に過ぎず、底面２１が舷側２４に近いほど低くなるように傾斜していてもよく、また側壁２５も上方に向かって拡開するように傾斜していてもよい。さらにベント管設置部２０は、上方からみて半円状を呈するように側壁２５が円筒状に成形されていてもよく、あるいは上方から見て三角形を呈するように三角柱状の空間であってもよいが、その周囲の歩路および作業区域が排出口１６を中心とした半径６ｍの球状空間外となるような大きさであることが好ましい。またベント管設置部２０の空間自体が排出口１６を中心とした半径６ｍよりも大きい形状を有することは、より好ましい。
FIG. 3 shows the structure of the vent pipe installation part 20. In this example, the vent pipe installation part 20 is a rectangular parallelepiped space, and is open to the heel side 24 side and upward. The shape of the vent pipe installation portion 20 is merely an example, and the bottom surface 21 may be inclined so as to be lower as it is closer to the heel side 24, and the side wall 25 is also inclined so as to expand upward. Also good. Further, the vent pipe installation part 20 may be formed in a cylindrical shape so that the side wall 25 has a semicircular shape when viewed from above, or may be a triangular column-shaped space so as to exhibit a triangle when viewed from above. However, it is preferable that the surrounding pedestrian and work area be outside the spherical space having a radius of 6 m with the discharge port 16 as the center. Moreover, it is more preferable that the space itself of the vent pipe installation part 20 has a shape larger than the radius 6 m with the discharge port 16 as the center.
図４に示すように、液化ガスタンク１３は一対設けられ、これらの液化ガスタンク１３は船体１２の幅方向に並んでいる。ベント管１４は各液化ガスタンク１３の頂部に接続され、左舷方向に水平に延び、舷側２４の近傍において上方へ延びてベント管設置部２０から突出している。曝露甲板１５上の安全性を確保するため、排出口１６はガレージデッキ２２および第１甲板２３上の歩路（図示せず）および作業区域（図示せず）から十分に離間していることが必要であり、排出口１６は歩路等から６ｍ以上の距離ｄ１だけ離れるように配置される。なお、距離ｄ１は排出口１６を中心とする球の半径である。また曝露甲板１５上において、居住区１７、機関排ガス出口１８、空気取入口、空気排出口、業務区域、制御場所、その他の非危険場所等の開口は、排出口１６を中心とする１０ｍの半径ｄ２の球状の空間内に配置されないように定められる。
As shown in FIG. 4, a pair of liquefied gas tanks 13 are provided, and these liquefied gas tanks 13 are arranged in the width direction of the hull 12. The vent pipe 14 is connected to the top of each liquefied gas tank 13, extends horizontally in the port direction, extends upward in the vicinity of the side 24, and protrudes from the vent pipe installation portion 20. In order to ensure safety on the exposed deck 15, the outlet 16 should be sufficiently spaced from the garage deck 22 and the walkway (not shown) and work area (not shown) on the first deck 23. It is necessary, and the discharge port 16 is arranged so as to be separated from the walkway by a distance d1 of 6 m or more. The distance d1 is a radius of a sphere with the discharge port 16 as the center. Further, on the exposed deck 15, the opening of the residential area 17, the engine exhaust gas outlet 18, the air intake port, the air exhaust port, the work area, the control place, and other non-hazardous places has a radius of 10 m centering on the exhaust port 16. It is determined not to be arranged in the spherical space of d2.
以上のように第１実施形態は、曝露甲板１５の一部を凹陥させてベント管設置部２０を形成したものである。したがって、排出口１６の高さ位置を抑えることができ、排出口１６から水面までの距離がエアドラフトになることはなく、自動車運搬船の航路選択に影響を与えることがない。またベント管設置部２０の凹陥部は曝露甲板１５の一部のみに設けられるので、上部構造物１１の貨物積載スペースの減少を最小限に抑えることができる。さらに、曝露甲板１５が比較的高い位置にある自動車運搬船等の船舶であっても、液化ガス燃料を利用することが容易になり、環境汚染を抑制することができる。
As described above, in the first embodiment, a part of the exposed deck 15 is recessed to form the vent pipe installation portion 20. Therefore, the height position of the discharge port 16 can be suppressed, the distance from the discharge port 16 to the water surface does not become an air draft, and does not affect the route selection of the car carrier. Moreover, since the recessed part of the vent pipe installation part 20 is provided only in a part of the exposed deck 15, the reduction of the cargo loading space of the upper structure 11 can be minimized. Furthermore, even if it is ships, such as a motor vehicle carrier ship in which the exposure deck 15 is a comparatively high position, it becomes easy to utilize liquefied gas fuel and can suppress environmental pollution.
また第１実施形態では、排出口１６は、歩路および作業区域から６ｍ以上離れた位置であり、また居住区１７、機関排ガス出口１８、空気取入口、空気排出口、業務区域、制御場所、その他の非危険場所等の開口から１０ｍ以上離れた位置に設置されている。そしてベント管設置部２０には排出口１６から排出されるガスが滞留しないように舷側２４側と上方に開口している。したがって液化ガスタンク１３の内圧が上昇して排出口１６から気相ガスが噴き出したとしても、船体や人体への影響を防ぐことができる。このような効果は、ベント管設置部２０の底面２１が舷側側に傾斜している構成において大きい。
Moreover, in 1st Embodiment, the discharge port 16 is a position 6 m or more away from the walkway and the work area, and also the residential area 17, the engine exhaust gas outlet 18, the air intake, the air discharge port, the work area, the control place, It is installed at a position more than 10m away from other non-hazardous locations. And the vent pipe installation part 20 is opened on the tub side 24 side and upward so that the gas discharged from the discharge port 16 does not stay. Therefore, even if the internal pressure of the liquefied gas tank 13 rises and the gas phase gas is ejected from the discharge port 16, the influence on the hull and human body can be prevented. Such an effect is significant in the configuration in which the bottom surface 21 of the vent pipe installation portion 20 is inclined toward the heel side.
図５は第２実施形態を示している。第１実施形態との違いは、ベント管設置部２０が船尾部分に設けられていることであり、その他の構成は基本的に第１実施形態と同様である。ベント管設置部２０は船尾側と舷側と上方に開口する空間である。液化ガスタンク１３は船体１２の中央部付近に配置され、ベント管１４は液化ガスタンク１３の頂部から船尾方向に水平に延び、船尾において上方へ延びている。
FIG. 5 shows a second embodiment. The difference from the first embodiment is that the vent pipe installation portion 20 is provided in the stern part, and other configurations are basically the same as those of the first embodiment. The vent pipe installation part 20 is a space that opens to the stern side, the anchor side, and upward. The liquefied gas tank 13 is disposed near the center of the hull 12, and the vent pipe 14 extends horizontally from the top of the liquefied gas tank 13 in the stern direction and extends upward at the stern.
第２実施形態によっても、第１実施形態と同様な効果が得られるが、三方に開口しているので、ベント管設置部２０におけるガスの滞留をより確実に防止できる。
According to the second embodiment, the same effect as that of the first embodiment can be obtained. However, since the openings are opened in three directions, it is possible to more reliably prevent the gas from staying in the vent pipe installation portion 20.
なお第１および第２実施形態において自動車運搬船はＲＯ－ＲＯ船を含む。また本発明は自動車運搬船に限定されず、客船にも適用でき、上部構造物が通常の船舶よりも大きいものであれば、自動車運搬船や客船以外の船舶にも適用可能である。
In the first and second embodiments, the car carrier includes an RO-RO ship. The present invention is not limited to a car carrier, but can also be applied to a passenger ship, and can be applied to a ship other than a car carrier or a passenger ship as long as the superstructure is larger than a normal ship.
１１ 上部構造物
１３ 液化ガスタンク
１４ ベント管
１５ 曝露甲板
１６ 排出口
２０ ベント管設置部 11Superstructure 13 Liquefied gas tank 14 Vent pipe 15 Exposed deck 16 Outlet 20 Vent pipe installation part
１３ 液化ガスタンク
１４ ベント管
１５ 曝露甲板
１６ 排出口
２０ ベント管設置部 11
Claims (6)
- 液化ガス燃料を貯留する液化ガスタンクと、
前記液化ガスタンクに接続されて上方に延び、曝露甲板に形成されたベント管設置部から突出するベント管と、
前記ベント管の上端に設けられ、前記液化ガスタンク内の気相ガスを大気中に放出するための排出口とを備え、
前記ベント管設置部が周囲の曝露甲板よりも凹陥し、かつ前記排出口が上部構造物または艤装品の最も高い部位よりも低い位置に定められることを特徴とする船舶のベント管設置構造。 A liquefied gas tank for storing liquefied gas fuel;
A vent pipe connected to the liquefied gas tank and extending upward and projecting from a vent pipe installation portion formed on the exposed deck;
Provided at the upper end of the vent pipe, and a discharge port for releasing the gas phase gas in the liquefied gas tank into the atmosphere,
A vent pipe installation structure for a ship, wherein the vent pipe installation portion is recessed from the surrounding exposed deck, and the discharge port is defined at a position lower than the highest part of the upper structure or the fitting. - 前記排出口から前記ベント管設置部の底面までの高さが、Ｂ／３（Ｂは前記船舶の全幅）または６ｍのうちいずれか大きい方の値以上に定められることを特徴とする請求項１に記載のベント管設置構造。 The height from the discharge port to the bottom surface of the vent pipe installation part is determined to be equal to or greater than B / 3 (B is the full width of the ship) or 6 m, whichever is greater. The vent pipe installation structure described in 1.
- 前記ベント管設置部が前記船舶の上方と舷側または船尾側に開口することを特徴とする請求項１または２に記載のベント管設置構造。 3. The vent pipe installation structure according to claim 1 or 2, wherein the vent pipe installation part opens above the ship and on a side or a stern side.
- 前記ベント管設置部が直方体状の空間であることを特徴とする請求項１～３のいずれか１項に記載のベント管設置構造。 The vent pipe installation structure according to any one of claims 1 to 3, wherein the vent pipe installation part is a rectangular parallelepiped space.
- 前記液化ガスタンクが前記船舶の船体の長手方向に沿って延びるように配置され、前記ベント管設置部の前記長手方向における位置が前記液化ガスタンクの前端から後端までの範囲にあることを特徴とする請求項１～４のいずれか１項に記載のベント管設置構造。 The liquefied gas tank is disposed so as to extend along the longitudinal direction of the hull of the ship, and the position of the vent pipe installation portion in the longitudinal direction is in a range from the front end to the rear end of the liquefied gas tank. The vent pipe installation structure according to any one of claims 1 to 4.
- 請求項１～５のいずれか１項に記載のベント管設置構造を備えたことを特徴とする船舶。 A ship provided with the vent pipe installation structure according to any one of claims 1 to 5.
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|---|---|---|---|
| JP2016-233129 | 2016-11-30 | ||
| JP2016233129A JP2018090023A (en) | 2016-11-30 | 2016-11-30 | Installation structure of vent pipe on ship |
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| PCT/JP2017/040374 WO2018100999A1 (en) | 2016-11-30 | 2017-11-09 | Vent pipe installation structure for ship |
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| CN115038641A (en) * | 2020-11-16 | 2022-09-09 | 今治造船株式会社 | Pipeline system, discharge method and control device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023089770A1 (en) * | 2021-11-19 | 2023-05-25 | 株式会社フコク | Elastic body for battery module |
| JP7332675B2 (en) | 2021-12-23 | 2023-08-23 | 株式会社新来島どっく | gas fueled ship |
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