JPH1059270A - Free-disconnective unit pipe with marine protective zinc - Google Patents

Abstract

PROBLEM TO BE SOLVED: To carry out the replacement of a corrosion preventive protective zinc in a pipe at the sea water discharging side as an inboard work at any time, and thereby, to make it unnecessary to dock every time for replacement of the protective zinc, and elongate the interval of the docking timing. SOLUTION: While a free-disconnective unit pipe with marine protective zinc for ship has a tubular side peripheral wall 7a, it furnishes at least the first flange 7b1 connected allowable to connect and disconnect to/from the flange pipe side in the ship through the first switch valve, at one end side, and at least the second flange 7b2 connected allowably to connect and disconnect to/from the flange pipe with shell plate, as an exhaust pipe with hull shell plate, through the second switch valve, and as well as a corrosion preventive protective zinc 5 is installed on the inner peripheral surface of the side peripheral wall 7a, a plug seating pipe 9a for drainage allowable to open and close is provided at one side of the side peripheral wall 7a, and a fluid flowing-in seating pipe 8a for ocean living thing attachment preventing, allowable to open and close, to the opposite other side of the side peripheral wall 7a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detachable unit pipe with a protective zinc for marine use, which is provided in a seawater discharge port for discharging seawater sucked into a ship after use, and then discharging the seawater outside the ship.

[0002]

2. Description of the Related Art FIG. 2 shows an example of the structure of a conventional spouting / discharging portion outside a seawater ship. In FIG. 1, an inboard flange pipe 3 is connected via a seawater valve 4 to an inner end side of a flange pipe 2 with an outer plate as a discharge pipe with a hull outer plate attached to the hull outer plate 1. The discharge port of the flanged pipe 2 with the outer plate is disposed below the waterline, and the seawater in the ship passes through the flanged pipe 3, the seawater valve 4, and the flanged pipe 2 with the outer plate sequentially.
Discarded outboard. On the inner peripheral surface of the flanged pipe 2 with an outer plate, a protective zinc 5 for protecting the flanged pipe 2 with the outer plate and the valve seat of the seawater valve 4 from electric corrosion.
Are attached by attachment means such as welding.

[0003]

The above-mentioned protective zinc is generally provided on both the seawater suction side and the seawater discharge side, but a grid for preventing foreign substances from being suctioned is provided on the suction side. There is an attached sea chest, and the protection zinc is usually installed in the sea chest, so that a relatively large protection zinc can be installed. In addition, on the seawater intake side, in order to prevent cavitation, the flow rate of seawater is suppressed to, for example, about 1 m / sec, which is relatively low, and the consumption of protective zinc is small. On the other hand, on the discharge side of seawater, it is not necessary to provide a sea chest with a lattice, and the flange pipe 2 with the outer plate as the discharge pipe with the hull outer plate is directly attached to the hull as described above. There is a limit to increasing the size of the protective zinc, and the flow rate is as fast as 2 m / sec, for example, because of the pump pressure, and the protective zinc is quickly consumed.

[0004] According to the rules of the classification society, it is mandatory to enter the dock once every four years to perform periodic inspections of the ship, and at that time, it is necessary to clean the valves, valve pipes, sea chests and other parts. Although it can be done, the protective zinc is consumed without waiting for the regular inspection once every four years, so the above-mentioned regular inspection is too late. By the way, the mounting position of the flange tube 2 with the outer plate as the discharge tube with the outer plate of the hull is below the waterline as described above, and the protective zinc 5 is provided with the flange tube 2 with the outer plate.
When the ship is floating on the water, the protection zinc 5 cannot be replaced. for that reason,
In line with the replacement of the protective zinc, they had to enter the dock without waiting for the periodic inspection once every four years.

[0005] Therefore, the present invention allows the protection zinc in the pipe on the discharge side of seawater to be replaced at any time without entering the dock even if the vessel is floating on the water. The work of replacing the protective zinc can be carried out efficiently as an onboard work without any special incidental work such as setting scaffolds, etc. This eliminates the need to enter the dock without waiting for the period of the periodic inspection, so that the interval between dock docks can be lengthened, and the pipe with the protective zinc attached can be handled as a unit part. Another object of the present invention is to provide a detachable unit tube with a marine protective zinc.

[0006]

In order to achieve the above-mentioned object, a detachable unit pipe with marine protective zinc according to the present invention is provided.
A cylindrical side peripheral wall, a first opening that opens at one end of the cylindrical side peripheral wall, and a second opening that opens at the other end of the cylindrical side peripheral wall, The first opening side can be detachably connected to the inboard flange pipe side via at least a first on-off valve, and the second opening side can be connected to the hull via at least a second on-off valve. A pipe connection can be detachably connected to a flange pipe with an outer plate as a seawater discharge pipe with an outer plate, and a protective zinc for corrosion prevention is mounted on an inner peripheral wall surface of the cylindrical side peripheral wall. Also,
The detachable unit pipe with marine protective zinc of the present invention has the same inner diameter as the inboard flange pipe and the outer plate flange pipe, and forms a first flange forming a first pipe joint at the first opening. And a second flange portion forming a second pipe joint at the second opening. Further, an openable and closable drain plug is provided on the cylindrical side peripheral wall of the detachable unit pipe with marine protective zinc according to the present invention. Further, a fluid introduction hole for preventing marine organisms from adhering is formed in the cylindrical side peripheral wall of the detachable unit tube with a protective zinc for ships of the present invention. Furthermore, in the detachable unit pipe with marine protection zinc of the present invention, an openable and closable drain plug is provided on the cylindrical side peripheral wall,
An openable and closable marine organism adhesion preventing fluid introduction hole is formed in the side peripheral wall on the side facing the drain plug with the center line of the cylindrical side peripheral wall interposed therebetween.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partial cross-sectional side view showing a state in which a detachable unit pipe with marine protective zinc according to an embodiment of the present invention is assembled between an inboard flange pipe and a flange pipe with an outer plate. The figure is shown. In the figure, a detachable unit pipe 7 with marine protection zinc is detachably connected to one end side, that is, the right side in FIG. 1 via a seawater valve 4 as a first opening / closing valve to an inboard flange pipe 3 side. And a first flange portion forming a first pipe joint at the first opening. The detachable unit tube 7 with the protective zinc for the marine vessel is opened and closed at the other end side, that is, on the left side in FIG. 1, for introducing a marine organism adhesion preventing fluid such as miscellaneous steam into the tube as a marine organism adhesion prevention measure. A marine organism adhesion prevention unit pipe 8 protruding upward from a side peripheral wall to form a marine organism adhesion prevention fluid introduction seat pipe 8a forming a possible marine organism adhesion prevention fluid introduction hole, and a second opening and closing It has a second opening which is detachably connected to a flanged pipe 2 with an outer plate as a discharge pipe with a hull outer plate via a gate valve 6 as a valve, and a second opening at the second opening. And a second flange portion forming the second pipe joint.

[0008] Removable unit tube 7 with marine protective zinc
Has the same inner diameter as the coaxial pipes such as the inboard flange pipe 3 and the outer pipe flange pipe 2, and has an outer plate on the inner peripheral wall surface of the detachable unit pipe 7 with the protective zinc for ships. A plurality of circumferentially divided protective zinc members 5 for protecting the inner portions of the flange tube 2 and the valve seat of the seawater valve 4 such as the valve seat from electric corrosion are fixed by welding or fixing means such as fixing bolts. ing. A plug seat tube forming a seawater drainage hole that can be opened and closed by a plug, that is, a plug 9, is disposed downward on the side peripheral wall of the detachable unit tube 7 with marine protection zinc.

When exchanging the detachable unit tube 7 with marine protection zinc shown in FIG. 1, first, the normally open gate valve 6 is closed and the detachable unit tube 7 with marine protection zinc is removed. Shield from the open sea. Thereafter, the normally open seawater valve 4 is closed, and the plug, that is, the plug 9 is operated to draw out the seawater from the detachable unit pipe 7 with the marine protective zinc. After the seawater in the detachable unit pipe with marine protection zinc 7 is extracted, the flanges as the pipe joints at both ends of the detachable unit pipe 7 with marine protection zinc are respectively attached to the flange of the pipe of the seawater valve 4 and the marine organisms. The detachable unit tube 7 with marine protection zinc is taken out as a unit, separated from the flange portion of the prevention unit tube 8 and replaced with a new detachable unit tube with marine protection zinc, and this new detachable unit tube with marine protection zinc is removed. Is inserted between the seawater valve 4 and the unit pipe 8 for preventing marine organisms from adhering, and the pipe is connected. Finally, seawater valve 4 and gate valve 6
Are switched from the closed state to the open state.

When the seawater is drained from the detachable unit tube 7 with marine protection zinc when the detachable unit tube 7 with marine protection zinc is replaced, the flanges at both ends of the detachable unit tube 7 with marine protection zinc are fixed. The seawater inside can also be drained by loosening the part, but when other equipment is placed below the detachable unit tube 7 with marine protective zinc, the plug or plug 9 is used as described above. Is desirably operated to drain the water from the stopper 9.

Since the above operation can be performed as an inboard operation, it is not necessary to enter the dock every time in order to replace the detachable unit pipe 7 with the protective zinc for boat. In addition, no special auxiliary work such as installation of a scaffold is required, and the unit can be replaced, so that the work can be efficiently performed in a short time.

FIG. 3 shows a detachable unit tube 7 with marine protection zinc according to another embodiment of the present invention. In the same figure, a detachable unit pipe 7 with marine protection zinc is connected to one end side, that is, the right side of FIG. 3, of a first detachably connected pipe to an inboard flange pipe side via at least a first on-off valve. has an opening, comprising a first flange portion 7b ₁ of the bolt insertion hole 7c ₁ to form a first tube joint in the first opening, the other end, i.e. the left side of FIG. 3, at least A second opening which is detachably connected to a flange pipe with an outer plate as a discharge pipe with a hull outer plate via a second on-off valve, and which has a second opening at the second opening; and a bolt insertion hole 7c with the second _second flange portion 7b ₂ to form a pipe joint.

The detachable unit tube 7 with marine protection zinc shown in FIG. 3 has the same inner diameter as the coaxial piping such as an inboard flange tube and a flange tube with an outer plate. On the inner peripheral wall surface of the side peripheral wall 7a of the universal unit tube 7, a plurality of circumferentially divided protections for protecting the inner tube portion such as the flange tube with the outer plate and the valve seat of the seawater valve from electric corrosion. Zinc 5 is welded 5
c, by welding, or by interposing an intervening material such as a rubber sheet 5a, for example, by a fixing means such as the fixing bolt 5b formed of a combination of bolts and nuts in the section a. Is fixed.

A plug seat tube 9a which forms a seawater drainage hole which can be opened and closed by operating a plug, that is, a plug 9, is provided on the side peripheral wall 7a of the detachable unit tube 7 with marine protective zinc in FIG.
Is disposed downward, and the side peripheral wall opposite to the plug seat tube 9a with the center line of the side peripheral wall 7a interposed therebetween is used as a countermeasure for preventing marine organisms from adhering, for example, for preventing marine organisms such as miscellaneous steam from adhering. A marine organism adhesion preventing fluid introduction seat pipe 8a with a flange portion 8b forming an openable and closable marine organism adhesion preventing fluid introduction hole for introducing a fluid for introduction into the pipe protrudes upward from the side peripheral wall 7a. Have been. Further, a hook hardware 10 is arranged on the upper surface side of the side peripheral wall 7a so that the detachable unit tube 7 with marine protective zinc can be engaged with a suspending hook such as a crane to perform suspending transfer. ing. Since the detachable unit tube 7 with marine protection zinc shown in FIG. 3 is provided with the seat tube 8a for introducing a marine organism adhesion preventing fluid as described above, the detachable unit tube with marine protection zinc shown in FIG. Instead of connecting the detachable unit pipe 7 with marine protective zinc to the gate valve 6 via the unit pipe 8 for preventing marine organisms from sticking like the unit pipe 7, the detachable unit pipe 7 with marine protective zinc is directly connected to the gate valve 6. Can be connected to

FIG. 4 shows an example of the pipe connection of the detachable unit pipe 7 with the marine protective zinc shown in FIG. In the figure, a detachable unit pipe 7 with marine protection zinc is connected to an inboard flange pipe 3 via a seawater valve 4 and to a flange pipe 2 with an outer plate via a gate valve 6.

FIG. 5 shows another example of the pipe connection of the detachable unit pipe 7 with marine protective zinc shown in FIG. In FIG. 1, a detachable unit pipe 7 with marine protection zinc is connected to an inboard flange pipe 3 via a gate valve sea 6 and to a flange pipe 2 with an outer plate via a seawater valve 4. .

[0017]

As described above, according to the detachable unit pipe with marine protection zinc of the present invention, the following effects can be obtained. (1) It has a cylindrical side peripheral wall, a first opening that opens at one end of the cylindrical side peripheral wall, and a second opening that opens at the other end of the cylindrical side peripheral wall. The first opening can be detachably connected to the inboard flange pipe via at least the first on-off valve, and the second opening can be connected to at least the second on-off valve. A detachable pipe connection can be made to a flange pipe side with an outer plate as a seawater discharge pipe with a hull outer plate via a shell, and a protective zinc for corrosion prevention is attached on an inner peripheral wall surface of the cylindrical side peripheral wall. Therefore, even if the ship is floating on the water, the protection zinc in the pipe on the discharge side of the seawater can be replaced at any time without entering the dock, and for example, in the work of replacing the protection zinc at that time, Efficient replacement of protective zinc without any special incidents such as setting scaffolds Work can be carried out as an on-board operation, and as a result, there is no need to enter the dock at the dock without having to wait for the periodic inspection of the ship in time for the replacement of protective zinc, thereby increasing the interval between dock docking times In addition, it is possible to handle the tube part to which the protective zinc is attached as a unit part (claim 1). (2) a first flange portion having the same inner diameter as the inboard flange tube and the outer plate flange tube, forming a first pipe joint at the first opening portion, and the second opening portion; Since the second flange portion forming the second pipe joint is provided in the above, the detachable unit tube with marine protective zinc can be manufactured as a unit and assembled, and when assembling or replacing, Using the first flange portion and the second flange portion, efficiently and reliably,
The detachable unit pipe with marine protection zinc can be assembled to other adjacent pipe parts, or desorption work can be performed,
Even if the vessel is floating on the water, the protective zinc in the pipe on the discharge side of the seawater can be replaced at any time without entering the dock. Can be efficiently performed as an on-board operation without the need for special incidental work, and as a result, docking can be carried out without waiting for the time for periodic inspections of the ship in time to replace the protective zinc. It is no longer necessary to enter the dock, and the interval between dock docking times can be extended (claim 2). (3) An openable and closable drain plug is provided on the cylindrical side peripheral wall. When detachable detachable unit pipes with marine protective zinc are removed, the drain holes are used to connect to surrounding equipment. Drainage can be drained in an orderly manner without drainage, and even when the vessel is floating on the water, the protective zinc in the pipe on the discharge side of seawater is replaced at any time without entering the dock It is possible to carry out the work of replacing the protective zinc efficiently as an onboard work without any special incidental work such as setting a scaffold for the work of replacing the protective zinc at that time. It is not necessary to enter the dock without waiting for the periodical inspection of the ship in accordance with the time of replacement of the ship, so the interval between dock docks can be lengthened, and the pipe with the protective zinc attached is a unit part. Treat as Doo is possible (claim 3). (4) Since the marine organism adhesion preventing fluid introduction hole is formed in the cylindrical side peripheral wall, a marine organism adhesion preventing fluid such as, for example, miscellaneous steam is used as a marine organism adhesion preventing fluid as a marine organism adhesion preventing measure. It is introduced into the pipe through the introduction hole, and can prevent marine organisms from attaching to the on-off valves such as seawater valves and gate valves that are normally kept in the open state. By providing such a fluid introduction hole for preventing marine organisms from sticking, even if the vessel is floating on the water, the protective zinc in the pipe on the discharge side of the seawater can be replaced at any time without entering the dock. It is possible to carry out the work of replacing the protective zinc efficiently as an onboard work without any special incidental work such as setting a scaffold for the work of replacing the protective zinc at that time. At the time of exchange It is no longer necessary to enter the dock without waiting for the periodical inspection of the ship, so the interval between dock docks can be lengthened, and the pipe with the protective zinc attached can be handled as a unit part. It is possible (claim 4). (5) An openable / closable drain plug is provided on the cylindrical side peripheral wall, and can be opened / closed on a side peripheral wall facing the drain plug across a center line of the cylindrical side peripheral wall. Since the marine organism adhesion prevention fluid introduction hole is formed, the detachable unit pipe with marine protective zinc is assembled with the drain hole facing down before assembling the detachable unit pipe with marine protective zinc. By using this, when removing the detachable unit tube with marine protective zinc, the drainage hole can be used to prevent the surrounding equipment from being drained and to drain the water in an orderly manner. The marine organism adhesion prevention fluid is introduced into the pipe through the marine organism adhesion prevention fluid introduction hole to prevent marine organisms from adhering to the on-off valves, such as seawater valves and gate valves, which are normally kept open. Can be prevented The detachable unit pipe with marine protective zinc is provided with such a drainage hole and a fluid introduction hole for preventing marine organisms from adhering. When replacing the protective zinc, it is possible to replace the protective zinc at any time simply by replacing the detachable unit pipe with the protective zinc for marine use as a unit without docking the ship in the dock. The work of replacing the protective zinc can be carried out efficiently as an onboard work without any special incidental work such as setting scaffolds, etc. There is no need to enter the dock without waiting for the period of the periodic inspection, and the interval between dock docking times can be extended (claim 5).

[Brief description of the drawings]

FIG. 1 is a partial sectional side view showing a main part of a detachable unit pipe with marine protection zinc according to an embodiment of the present invention, which is assembled between an inboard flange pipe and an outer plate flange pipe.

FIG. 2 is a vertical sectional side view showing a main part of an example of a conventional structure of a spout port outside a seawater ship.

FIG. 3 is a longitudinal sectional view of a detachable unit tube with marine protective zinc according to another embodiment of the present invention.

4 is a main part side view showing one example of the pipe connection of the detachable unit pipe with the marine protective zinc shown in FIG. 3;

5 is a main part side view showing another example of the pipe connection of the detachable unit pipe with marine protective zinc shown in FIG. 3;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Hull outer board 2 Flange pipe with outer board as discharge pipe with hull outer board 3 Inboard flange pipe 4 Seawater valve 5 Protective zinc 5a Rubber sheet 5b Fixing bolt 5c Welding part 6 Gate valve 7 Removable unit pipe with marine protective zinc 7a side wall 7b _1, 7b ₂ flange portion 7c _1, 7c ₂ bolt insertion hole 8 marine anti-biofouling for unit tube 8a marine anti-biofouling fluid introduction seat tube 8b flange 9 plugs 9a plug seat tube 10 hook fittings

Claims (5)

[Claims] 1. A cylindrical side peripheral wall, a first opening that opens at one end of the cylindrical side peripheral wall, and a second opening that opens at the other end of the cylindrical side peripheral wall. The first opening side can be detachably connected to the inboard flange pipe side via at least a first opening / closing valve, and the second opening side is at least a second opening / closing side. A pipe connection can be detachably connected to the flange pipe side with an outer plate as a seawater discharge pipe with a hull outer plate via a valve, and on the inner peripheral wall surface of the cylindrical side peripheral wall, protective zinc for corrosion prevention is provided. A detachable unit tube with marine protective zinc, which is attached. 2. The detachable unit tube with marine protective zinc according to claim 1, wherein the first tube has the same inner diameter as the inboard flange tube and the outer plate flange tube, and has a first opening at the first opening. A first flange portion forming a joint, and a second flange portion forming a second pipe joint at the second opening.
Detachable unit tube with marine protection zinc. 3. The detachable unit pipe with marine protection zinc according to claim 1, wherein an openable and closable drainage plug is provided on the cylindrical side peripheral wall. Detachable unit tube with zinc. 4. The detachable unit tube with marine protective zinc according to claim 1, wherein a fluid introduction hole for preventing marine organisms from adhering is formed in the cylindrical side peripheral wall. A detachable unit tube with marine protective zinc. 5. The detachable unit pipe with marine protection zinc according to claim 1, wherein an openable and closable drain plug is provided on the cylindrical side peripheral wall. A detachable unit pipe with marine protective zinc, wherein a fluid introduction hole for preventing marine organisms from adhering is formed on a side peripheral wall on the side facing the drain plug with the center line of the side peripheral wall interposed therebetween.