JP4357555B2 - Oil tank piping structure - Google Patents

Description

  The present invention relates to an oil tank ship in a broad sense, that is, a dedicated oil tank ship for loading only crude oil, and a combined oil tank ship for loading not only crude oil but also solid cargo such as ore and coal, and particularly relates to its oil pipe and other piping structures.

  In a conventional oil tanker, as shown in FIG. 8 (a), a coin oil pump 17 is installed in a pump chamber 16 provided in front of a stern engine room 18, and a coin oil communicating with each cargo tank is provided therewith. An intake pipe 57 and a coin oil delivery pipe 50 connected to a shore connection 48 provided on the upper deck at the center of the hull are connected to each other. When unloading oil (crude oil), oil in each oil tank is sucked into the coin oil pump 17 through the coin oil suction pipe 57, reaches the shore connection 48 from the coin oil pump through the coin oil delivery pipe 50, and from now on. Sent to land receiving facility. In order to increase the suction efficiency, the coin oil suction pipe 57 is usually passed through as low as possible in the cargo tank. On the other hand, the coin oil delivery pipe 50 rises from the pump chamber onto the upper deck 30 and passes through the upper deck as it is to reach the center of the hull.

  In such a pipe, the coin oil delivery pipe 50 installed on the upper deck is easily corroded by being exposed to waves and sea breeze, which requires a lot of maintenance work. Furthermore, the large-diameter coin oil delivery pipe 50 guided on the upper deck obstructs left-right traffic on the upper deck, and reduces the work efficiency of the crew.

  Therefore, in Patent Documents 1 and 2, as shown in FIG. 8 (b), the coin oil delivery pipe 50 of the oil tank ship is passed not through the upper deck but through the inside of the coin tank, and on the upper deck at the center of the hull. It is proposed to start up and connect to the shore connection 48. In this way, the coin oil delivery pipe 50 is removed from the upper deck, and does not become an obstacle to corrosion or traffic on the deck.

  However, it is not only freight oil delivery pipes that hinder traffic on the upper deck in conventional tankers. In addition, there are fuel oil loading pipes, coin oil stripper pipes, fire fighting main pipes, tank cleaning pipes, electric wire pipes, etc. that are led along the upper deck. In addition, recent large tankers are equipped with an inert gas device to prevent explosion accidents, and an inert gas main pipe led from an inert gas generator placed at the rear of the hull is led near the bow on the upper deck. Is also obstructing the passage of the upper deck.

  In particular, in a combined tank tank that can be loaded with ore and bulk, there is a Kuraguchi on the upper deck, and traffic on the upper deck is even more problematic. In addition, when handling ore and coal, ore and coal spill over the pipes, a protective cover is required on the pipes, and the ore and coal scraped under the protective cover after loading are removed. There is also a problem that it takes a lot of work to remove.

Therefore, simply passing the coin oil delivery pipe through the coin oil tank does not fundamentally solve problems such as passage on the upper deck, cleaning, and corrosion deterioration of the pipe.
Japanese Utility Model Publication No. 55-107498 Japanese Patent Laid-Open No. 08-295288

  This invention makes it a subject to eliminate such various problems in the conventional exclusive or combined use tank tank.

  The coin oil piping structure according to the present invention is provided with a pipe passage extending in the front-rear direction inside the hull behind the upper deck, in which a pump chamber disposed at the rear of the hull and a shore connection directed on the upper deck at the center of the hull It contains a coin oil delivery pipe that connects the two. The pipe passage is covered with a closed wall and the ceiling of the wall is formed by the hull upper deck.

  By providing a pipe passage under the upper deck in this way and storing the coin oil delivery pipe in it, when oil leaks from the coin oil delivery pipe, it can be prevented from flowing out to the sea immediately and safety. Improves. Moreover, since there is no coin oil delivery pipe on the upper deck, it is easy for people and work vehicles to pass. Also, unlike the case where the coin oil delivery pipe passing through the pipe passage is on the upper deck, it is not exposed to waves and sea breeze, and the occurrence of rust is suppressed, and repair costs can be reduced.

  In the pipe passage, not only freight oil delivery pipes, but also inert gas pipes, tank cleaning pipes, fire fighting main pipes, electric pipes, freight oil stripper pipes, fuel oil loading pipes, etc. Most of the various pipes can be passed. In this way, problems such as traffic on the upper deck, cleaning, and corrosion deterioration of pipes can be almost eliminated. In addition, pipes such as inert gas pipes, tank cleaning pipes and firefighting main pipes must be installed close to the bow, so the pipe passages that pass these pipes will extend to the bow.

The pipe passage can be arranged in contact with a longitudinal partition wall provided so as to divide the inside of the hull into several rows of oil tanks or in contact with a ballast tank provided on the ship side. With this arrangement, the hull structural member can be used as a part of the surrounding wall of the pipe passage, so that material can be saved and the pipe passage can be made at low cost. In the combined tanker, the upper deck is provided with a hatch, and the hatch side girder is attached to the lower surface of the upper deck along the side edge thereof, so that this girder can be used as the surrounding wall of the pipe passage.

  The pipe passage is provided with an entrance with a closing device so that it can enter and exit from the upper deck. The passage is formed in a size that allows people to pass easily. Moreover, it is preferable that the pipe passage is provided with a ventilation device, a gas detector, an automatic fire extinguishing device, etc. so that flammable gas accumulates in the pipe passage and does not cause a fire accident.

  First, the case of an ore / oil combined ship will be described. As shown in FIGS. 1 and 2, the hull is partitioned by a transverse bulkhead 10. From the front, the bow part 12, the cargo space 14, the pump room 16, and the engine room 18. The stern section 20 is in order. A residential area 22 and a steering room 24 are provided on the engine room 18.

  As shown in FIG. 3, the cargo space 14 has a double hull structure on both the ship bottom and the ship side, and both of them are ballast tanks 26 and 28. The space surrounded by the double hull structure and the upper deck 30 is divided into a central coin tank (cum ore hold) 34 and a left and right coin tank 36 by left and right longitudinal partition walls 32. The upper deck 30 directly above the central coin tank 34 is provided with a storehouse 38, and the storehouse is provided with a hatch cover 40 having an oil-tight structure.

  A pipe passage 42 having a substantially rectangular cross-section is formed so as to be sandwiched between the upper part of the central coin tank 34 and the vertical partition wall 32 and the warehouse 38. The surrounding wall that surrounds the pipe passage is composed of an upper deck 30 on the upper side and a longitudinal partition wall 32 on the outer side, and the inner surrounding wall is made using a hatch side girder 46 provided on the lower surface of the upper deck. Thus, the pipe passage can be made at low cost because the three surfaces of the surrounding wall are shared by the hull structural members 32 and 46.

  In this way, the pipe passage 42 is formed on both sides of the upper deck, and various pipes that have been conventionally provided on the upper deck are provided therein. As shown in FIG. 2, both pipe passages extend forward from the pump chamber 16, but have different lengths on the left and right sides, and the starboard pipe passage extends only to the center of the hull. Extends near the bow.

  In the case of this ship, there are a total of three freight oil delivery pipes 50 that leave the pump chamber 16 and go to the shore connection 48 in the center of the hull, and as shown in FIG. The remaining one passes through the port pipe passage. The left and right string shore connections 48 are connected by a crossover pipe 52, and the coin oil delivery pipe 50 passing through the pipe passage is drawn out on the upper deck at the center of the hull and connected to the crossover pipe 52.

  In addition, the starboard pipe passage 42 accommodates pipes 54 connected to the shore connection 48, for example, a fuel oil loading pipe and a coin oil stripper pipe.

  This ship is obtained by treating the inert gas (main boiler exhaust instead of the outside air) in the tank when the cargo oil tank becomes negative pressure during unloading or during voyage to prevent the explosion of the tank. And contains almost no oxygen). The pipe for sending the inert gas is a large-diameter pipe similar to the coin oil delivery pipe 50, but the inert gas pipe 58 is led to the vicinity of the bow through the port pipe passage. Branch pipes 60 are branched from the middle of the inert gas pipe 58, and as shown in FIG. 4, these branch pipes reach the coin tanks 34 and 36 through the upper deck.

  As shown in FIGS. 3 and 4, in the port pipe passage, in addition to the coin oil delivery pipe 50 and the inert gas pipe 58, pipes 62 extending to the bow, such as a tank cleaning pipe, a fire fighting main pipe, a conduit pipe, etc. Is passed.

  Inside the pipe passage 42, operations such as opening and closing of valves and maintenance and inspection work of various pipes are performed. Therefore, a plurality of entrances 68 are provided so that the pipe passage 42 can enter and exit from the upper deck 30, and the entrances are watertight doors. It can be closed. It is also important to secure a space that allows people to pass through the pipe passage 42.

  It is preferable that the pipe passage 42 is provided with a ventilation device, a gas detector, a fire extinguishing device (for example, carbon dioxide gas type) and the like so that the combustible gas does not accumulate and lead to a fire accident.

  In addition, reference numeral 57 denotes a coin oil suction pipe, which is led toward the pump chamber 16 through the bottoms of the left and right coin oil tanks 36.

  In the above-described embodiment, the pipe passage 42 is provided between the longitudinal partition wall and the warehouse. However, as shown in FIG. 5, the pipe passage may be provided directly below the upper deck and in contact with the ship-side ballast tank 28. . In this case, the outer part of the surrounding wall of the pipe passage 42 is constituted by the inner wall 29 of the ship-side ballast tank 28, respectively. The pipes passing through the pipe passage are the same as in FIG.

  FIG. 6 shows the case of a dedicated oil tanker. Since this ship does not have a storehouse, as shown by the chain line in the figure, a pipe passage 42 is provided so as to pass through the center of the hull, and a coin oil delivery pipe, an inert gas pipe, and other pipes are provided therein. Store. Alternatively, as shown by the solid line in the figure, the pipe passages 42 can be provided symmetrically on both sides so as to contact the ship side double hull structure.

  FIG. 7 shows the case of an OBO ship, that is, an oil tank tank for oil, bulk, ore, and the pipe passage 42 is formed so as to be sandwiched between the ship-side ballast tank 28 and the warehouse 38. In this type of ship, the width of the kuraguchi is large, and therefore the upper deck passage on the side of the kuraguchi is very narrow. Therefore, the merit of not passing pipes through the narrow passage is great.

It is a hull side view of an ore / oil combined use ship. It is a hull top view of the ship of FIG. FIG. 3 is a cross-sectional view of the hull as seen from the direction of arrow 3-3 in FIG. 2. FIG. 4 is a cross-sectional view of the hull as seen from arrow 4-4 in FIG. It is a hull center sectional drawing which shows another Example of an ore and oil combined ship. It is sectional drawing of the hull center part which shows the Example of a dedicated oil tank ship. It is sectional drawing of the hull center part which shows the Example of an ore, bulk, and oil combined use ship. It is a hull side view which shows the coin oil pipe arrangement | positioning of the conventional oil tank ship.

Explanation of symbols

16 Pump room 28 Ship side double hull structure 30 Upper deck 32 Longitudinal bulkhead 34 Central oil tank 36 Left and right oil tanks 38 Kuraguchi 42 Pipe passage 46 Hatchside girder 48 Shore connection 50 Coin oil delivery pipe 57 Coin oil intake pipe 58 Inert gas tube

Claims (6)

A pipe passage extending in the longitudinal direction on the hull inside the upper deck back provided therein, accommodating the cargo oil delivery pipe connecting the shore connection eclipsed set the pump chamber and the midship on the deck to be placed on the hull rear The pipe passage is covered with a hermetically sealed enclosure, and the ceiling portion of the enclosure is formed by the upper deck of the hull , and one side of the enclosure defines the side edge of the kuraguchi provided on the upper deck. Piping structure of an oil tanker ship that is formed with a hatch side girder attached to the lower surface of the upper deck to pass through . A pipe passage extending in the longitudinal direction on the hull inside the upper deck back provided therein, accommodating the cargo oil delivery pipe connecting the shore connection eclipsed set the pump chamber and the midship on the deck to be placed on the hull rear The pipe passage is covered with an enclosed wall, and the ceiling portion of the enclosure is formed by an upper deck of the hull , and the pipe passage is in contact with a ship-side ballast tank provided on the ship side. An oil tank ship piping structure in which one side wall of the pipe passage is formed by an inner wall of the ship side ballast tank .   The pipe passage is disposed in contact with a longitudinal partition wall provided so as to divide the inside of the hull into several rows of oil tanks, and the longitudinal partition wall constitutes one side wall of the pipe passage. 2. The piping structure of the oil tank ship according to 2. The pipe passage extends to the hull front therein, according to inert gas pipe for sending the inert gas generator disposed in the hull rear the inert gas to each cargo oil tank in claim 1, 2 or 3 and Shirube設Oil tank ship piping structure. The piping structure for an oil tanker according to claim 1, 2, 3, or 4 , wherein the pipe passage is formed to have a size such that a person can pass through the pipe passage. The piping structure for an oil tanker according to claim 1, 2, 3, 4, or 5 , wherein the pipe passage has a plurality of doorways leading to the upper deck.

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