JP2005239142A - Sea chest seawater inflow hole sheathing board of vessel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheathing board for closing a seawater inflow hole of a sea chest of a vessel provided with a ballast tank (seawater tank) to safely and quickly perform a work and to prevent separation and washout of the sheathing board. <P>SOLUTION: In a sheathing board main body 10, an elastic packing 15, a second reinforcing plate 14 made of wood, etc., an intermediate plate 13 made of aluminum, etc., a first reinforcing plate 12 made of wood, etc., and a surface plate 11 made of aluminum, etc. are laminated in this order successively from a hull side to be mutually fixed with fixing screws 17 at four corners. A fixing bolt 20 provided with a hook engaged to an edge bar of a foreign matter preventing window 3 passes through a through hole at the center of the sheathing board main body 10 to fix the sheathing board main body 10 to the hull by being screwed onto the fixing nut 30 from the outside. In the sheathing board main body 10, a bolt 16 for fixing a rope is mounted to tie a rope for pulling up. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a sheathing board for closing a seawater inflow hole in a sea chest of a ship. In particular, the ship is not moored at the dock, and the sea inflow holes for sea chests formed in several places on the hull of the ship are closed while floating in the sea to block sea water inflow through the sea chest. The present invention relates to a device that enables replacement or repair work of equipment and piping such as a seawater inflow valve and a one-touch pump.

  The ship has a sea chest 1a formed in all directions below the center of the hull 1, that is, from the bow of the portion where the ship is immersed in water to the stern. A prevention window 3 is formed. The sea chest 1a is formed by being separated from the sea water tank (ballast tank) 8 by a partition plate 1b as shown in FIG. 5, and the sea water that has flowed in through the sea chest 1a by the operation of the sea water inflow valve 6 enters the sea water tank 8. The seawater tank 8 is filled with a necessary amount of seawater to increase the weight of the ship. When the seawater in the seawater tank 8 is discharged to the outside through the water pump 7 and the pipe body 7a, the weight of the ship becomes lighter, and the center of gravity (weight center) of the ship depends on whether the seawater in a certain seawater tank is discharged. Will be adjusted to keep the ship level. The reason for doing this is that when the ship is heavy due to luggage or passengers carried on the ship, the seawater inside the seawater tank 8 is discharged to operate the weight of the ship itself. This is in order to maintain the level by keeping the balance between the center of the right and left weight of the ship and the center of the front and rear weight according to the most economical condition (standard of the waterline). On the contrary, the ship's weight is light, that is, the waterline (the line indicating the position where the hull is immersed in the sea surface so that the most economical operation is possible during ship operation) When the ship is operated with a lighter weight than it is, the operation becomes uneconomical with respect to wind resistance and wave resistance. Therefore, the seawater tank is filled with seawater so that the propeller can rotate at an appropriate depth. In addition, the ship can be operated economically by improving the straight traveling performance of the ship and preventing the phenomenon that the ship is pushed by wind and waves.

  By the way, a variety of pipes are formed in the seawater tank 8 including the seawater inflow valve 6 and the water pump 7 (simply shown in FIG. 5). Failure of the seawater inflow valve 6 and its peripheral devices or its peripheral piping frequently occurs. Accordingly, when an emergency occurs periodically or when the function of the seawater tank is lost due to failure or damage to the equipment or piping, each equipment and piping in the seawater tank 8 must be repaired and replaced. In this case, the optimal method is to enter the ship in the dock of the repair shipyard or place it on the lorry, and then discharge the seawater in the seawater tank 8 before starting the work. Often times it cannot be transported to shipyards. In this case, the sea chest 1a is always filled with seawater with pressure so as to work with the ship floating on the water. Accordingly, when the seawater inflow valve 6 is separated from the partition plate 1b, or when the coupling of the seawater inflow valve 6 is separated, or when the piping line is cut and the coupling of the piping line is separated, the inside of the sea chest 1a Seawater flows into the seawater tank 8 in an instant. Therefore, it is difficult to carry out correct work and work efficiency is greatly reduced. In addition, there is a high possibility that a worker is exposed to danger and a safety accident occurs. As shown in FIG. 5, according to the present invention, the seawater tank 8 is closed in a state where the seawater inflow hole 2 of the sea chest 1a is closed outside the hull 1 and the seawater is safely blocked so as not to flow into the sea chest 1a. The following is a description of the conventional work method related to this, when an operator enters the inside to enable safe work.

  When the ship is lowered in place and the position is fixed, the diver enters the water holding the iron plate or wood plate, and then puts the iron plate or wood plate into the seawater inlet 2 of the sea chest 1a as shown in FIG. Adhere. Then, the steel plate and the wooden plate block the seawater inflow hole 2 due to the pressure of the seawater. When the water pump 7 is operated in this state to discharge the seawater in the seawater tank 8 to the outside of the hull, Space is secured. Therefore, the worker enters the seawater tank 8 to work, but if the water pump 7 fails and does not operate, the emergency water pump is used to discharge the seawater in the seawater tank 8. Will be allowed to.

  As described above, the conventional seawater inflow hole 2 blocking operation is difficult and dangerous because the seawater inflow hole 2 is closed after a diver holds a steel plate or a wooden board. In addition, the conventional method not only requires a high degree of skill, but also removes seaweeds and small shells attached to the outer surface of the seawater inflow hole 2 with a knife, and then attaches an iron plate or a wooden plate. However, seawater flows through the sea chest 1a through the gap between the steel plate or the wooden plate and the hull surface. That is, the work efficiency is lowered due to the problem that the seawater tank 8 is filled with seawater. Further, since the water pump 7 is continuously operated to discharge the seawater flowing into the seawater tank 8 to the outside of the hull, it is uneconomical and a safety accident such as an electric shock may occur. An iron plate or a wood plate attached to the outside of the hull, that is, the edge of the seawater inflow hole 2 by seawater pressure may be detached from the original position by a tidal current or a wave. After the work in the seawater tank 8 is completed, it is necessary for the diver to perform the work of separating the iron plate and the wooden board from the hull and carrying them into the ship. there were.

  On the other hand, in such a conventional work, as a steel plate or a wooden plate, a plate cut larger than the seawater inflow hole 2 of the sea chest 1a is simply used, so that the weight is very heavy or very light and in the atmosphere. Of course, it is not easy to use underwater. Moreover, it is difficult to process into the form which can adhere most appropriately according to the shape of the seawater inflow hole 2. FIG. For this reason, there is a problem that the seawater inflow into the seawater inflow hole 2 cannot be completely blocked even if the seawater inflow hole 2 is blocked because the seawater inflow hole 2 is blocked. As a result, there is a problem that the durability against corrosion is insufficient, and the life of the iron plate or the wooden plate is shortened, which is not economical.

Reference numeral 1 c is a manhole that allows an operator to enter and exit the seawater tank 8. Although the manhole is also formed in the partition plate 1b, since this is a known matter, it is not shown in FIG.
JP 2002-187590

  Accordingly, it is an object of the present invention to provide a weir plate for a sea-chest seawater inlet for a ship manufactured in a special manner in order to solve the problems caused by the conventional working method.

  In order to achieve the above-mentioned object, the present invention has a watertight effect by being in close contact with seawater pressure outside the seawater inflow hole 2 of the hull 1, and a hole 5 through which a fixing bolt 20 passes is formed at the center. An elastic packing 15 having the same form as that of the seawater inflow hole 2 and having a diameter larger than the diameter of the seawater inflow hole 2, and the same size and form as the size and form of the elastic packing 15, The second reinforcing plate 14 in which the hole 5 through which the fixing bolt 20 passes is formed at the center, and the same size and form as the size and form of the second reinforcing plate 14, and the fixing bolt 20 at the center. The intermediate plate member 13 in which the hole 5 through which the through hole is formed has the same size and form as the intermediate plate member 13 and the hole 5 through which the fixing bolt 20 passes is formed in the center. 1 reinforcing plate 12, The surface plate 11 having the same size and shape as the first reinforcing plate 12 and having a hole 5 through which the fixing bolt 20 penetrates in the center, and for fixing the whole to each other A dam plate body 10 composed of a fixing screw 17 assembled to the edge, and one or two of the dam plate body 10 are assembled, and a rope is wrapped to submerge the dam plate body 10 or on the water surface. The rope fixing bolt 16 to be pulled up, the foreign matter prevention window 3 fixed to the seawater inflow hole 2 of the hull, and the weir plate body 10 are mutually attracted and fixed, and the fixing bolt 20 A marine sea-chest seawater inlet hole dam plate is provided that includes a rubber packing 32 and a fixing nut 30 that are assembled to each other.

  Further, the present invention is characterized in that the material of the front plate member 11 and the intermediate plate member 13 is aluminum, the material of the first reinforcing plate 12 and the second reinforcing plate 14 is wood, and the fixing bolt 20 is The locking hook 22 is formed with projections 23 that engage with the foreign matter prevention window 3 at the top and bottom, and the locking hook 22 and a screw rod 21 fixed by welding. The elastic packing 15 is made of rubber, urethane, or synthetic resin.

  The present invention employs an aluminum plate and a wooden plate that are manufactured with a weight that is easy for an operator to handle in the air and water, and at the same time adopts a structure that has sufficient strength to withstand the pressure of seawater, By blocking the seawater, it is possible to work safely and quickly. In addition, it becomes possible to prevent the dam plate attached to the hull from being detached or lost by using the fixing bolt and the fixing nut. Therefore, it is possible to perform the work of the diver safely and easily by aiming at a more complete work and blocking the seawater.

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

  In the present invention, as illustrated in FIG. 5, an example in which the design of the dam plate body 10 is set with reference to the seawater inflow hole 2 formed in a portion where the hull 1 forms a plane will be described. If the sea chest 1a including the seawater inflow hole 2 is formed in a portion forming a quadratic curve or a cubic curve of the hull, the form of the weir plate body 10 of the present invention also has a quadratic or cubic curve. It is configured in the form that is made. That is, the structure of the main body 10 of the present invention has a form of a quadratic or cubic curve without changing. In this case, curve forming is performed through normal material plastic working using a press work or a mold, but since this technique is a known matter, it is not presented in the present invention, and a planar dam plate is used as a basic embodiment. The main body 10 will be described as an example.

  As shown in the drawings, the dam plate body 10 of the present invention has a multiple structure, and the portion that contacts the hull 1 is made of an elastic packing 15 to improve water tightness. The material is any of rubber (especially diene-based synthetic rubber), urethane (elastomer or independent foam), and other synthetic resins (especially olefin-based elastomer or independent foam). It is desirable to select one of them, and in addition, an elastic material having a mixture or similar physical properties can be used. A second reinforcing plate 14 made of a wooden board is attached on the elastic packing 15, an intermediate plate material 13 made of aluminum is attached on the elastic packing 15, and a first reinforcing plate 12 made of wood is attached on the second reinforcing plate 14. The surface plate 11 made of aluminum is attached. The fixing screw 17 integrates the above-described overall components. At this time, these can be bonded to each other using a normal adhesive, and at the same time, can be fixed with the fixing screw 17, but such a change can be applied depending on the will of the producer or user.

  The reason why the wood plate and the aluminum plate material are alternately combined in this way is to make the handling as easy as possible by reducing the weight of the wood plate and the aluminum plate material while having sufficient durability against seawater pressure. In addition, it is easy for a diver to take them in the water and move them, and at the same time, the shape is easily deformed through press or mold work according to the shape of the seawater inflow hole 2, and after the shape is completed, This is to maintain the form. Therefore, the aluminum plate material having excellent workability and excellent strength and elasticity plays a role of a skeleton so that the corrosion of the first reinforcing plate 12 and the second reinforcing plate 14 made of wood is blocked to the maximum. .

  On the other hand, the dam plate body 10 of the present invention can be made thicker or thinner depending on the depth of water used, but the overall thickness becomes thicker when it is attached to the sea chest 1a where the water depth is deep. In the opposite case, the overall thickness should be reduced. And it fixes these, protecting the reinforcement board which consists of wood using the aluminum board | plate material which has a light and strong component and is not easily corroded by seawater. Therefore, since it has a structure capable of withstanding a large pressure even if it is not heavy, it is easy to handle even in the atmosphere, and it is easy to use the dam plate body 10 in which the diver receives buoyancy in the water. It is.

  For reference, in the case of the dam plate body 10 that closes a sea chest (500 mm wide, 800 mm long) at a position of about 5 meters in water, the thickness of the elastic packing 15 is 10 mm, and the first reinforcing plate 12 and the second reinforcing plate 14 As a result of using a surface plate 11 and an intermediate plate 13 having a thickness of 15 mm and a thickness of 5 mm, it can be seen that the weight is about 50 kg, which is a desirable specification. Of course, it is not limited to the above-mentioned numerical values, and can be somewhat adjusted.

  Next, as shown in the drawing, one or two rope fixing bolts 16 are assembled to the dam plate body 10 of the present invention, and when the diver dives into the water, a rope is wrapped around the rope fixing bolts 16 and the winch. Alternatively, it is easy to submerge the dam main body 10 in water. Therefore, although the work of the diver becomes more convenient, there is a convenience that can be hung up without depending on the power of the diver even when the main body 10 is returned to the original position on the ship. . As described above, when the dam plate body 10 is submerged in the water, the diver moves the dam plate body 10 to the front of the sea chest 1 a and then moves the locking hook 22 of the fixing bolt 20 into the foreign matter prevention window 3. Then, the projection 23 is placed vertically so that the projection 23 is related to the foreign matter prevention window 3 as shown in FIGS. Of course, the fixing bolt 20 is assembled at the central portion of the foreign matter prevention window 3. In this state, the dam plate body 10 is gradually moved toward the seawater inflow hole 2 of the sea chest 1a so that the screw rod 21 penetrates the hole 5 of the dam plate body 10, and the dam plate body 10 flows into the seawater. It makes contact with the edge of the hole 2 and adheres as shown in FIG. At this time, since the dam plate body 10 is attached to the hull due to the pressure of seawater, if the hole 5 is closed, the inflow of seawater to the sea chest 1a is blocked. Is likely to be detached from the hull, and the dam plate main body 10 is further secured safely using the fixing bolt 20. A fixing nut 30 to which a rubber packing 32 is bonded is assembled to the screw rod 21 penetrating the hole 5 of the dam plate body 10. That is, as shown in FIG. 1, the dam plate body 10 is safely fixed through the hull and the foreign matter prevention window 3 by the fixing bolt 20 and the fixing nut 30.

  Thereafter, the work in the sea chest 1a or the seawater tank 8 can be performed safely as described above. When the present invention is separated from the hull and moved onto the hull after the work is completed, the assembly is performed. The fixing nut 30 is unfastened from the fixing bolt 20 in the reverse order, and the dam plate body 10 is pulled up onto the hull by a rope tied to the rope fixing bolt 16. At this time, if the diver separates the main body 10 from the hull and the screw rod 21 is pulled out from the hole 5, the main body 10 can be easily separated from the hull and pulled up, and the fixing bolt 20 and If the diver brings the fixing nut 30 onto the ship, the operation is completed.

  In this manner, seawater flows into the sea chest 1a, and an appropriate amount of seawater flows into the seawater tank 8 by the operation of the seawater inflow valve 6.

It is sectional drawing (1) which shows the use condition by one Embodiment of this invention. It is sectional drawing (2) which shows the use condition by one Embodiment of this invention. It is a reference view showing a fixed bolt and a fixed nut of the present invention. It is a front view which shows the weir board of this invention. It is a reference figure showing the state where the present invention was assembled to the sea chest.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hull 2 Seawater inflow hole 3 Foreign object prevention window 10 Weir board body 20 Fixing bolt 30 Fixing nut

Claims (5)

A watertight action is achieved by seawater pressure outside the seawater inflow hole of the hull, a hole through which a fixing bolt penetrates is formed in the center, and has the same form as the seawater inflow hole, and the seawater inflow An elastic packing having a diameter larger than the diameter of the hole;
A second reinforcing plate having the same size and form as the elastic packing and having a hole through which a fixing bolt passes in the center;
An intermediate plate material having the same size and form as the second reinforcing plate and having a hole through which a fixing bolt passes in the center,
A first reinforcing plate having the same size and shape as the intermediate plate material, a hole through which a fixing bolt passes is formed at the center;
A surface plate material having the same size and form as the first reinforcing plate, and a hole through which a fixing bolt passes is formed in the center;
A dam plate body composed of fixing screws assembled to the edges in order to fix the whole to each other,
A rope fixing bolt that is assembled at one or two places of the dam plate, and the rope is tied to submerge the dam plate body or to pull it up on the water surface;
A fixing bolt for attracting and fixing the foreign matter prevention window fixed to the seawater inflow hole of the hull and the dam plate body,
Rubber packing and fixing nut assembled to the fixing bolt;
A sea chest seawater inflow hole dam plate for a ship, characterized in that   2. The sea chest seawater inlet hole dam for a ship according to claim 1, wherein the material of the front plate and the intermediate plate is aluminum.   2. The sea chest seawater inlet hole dam for a ship according to claim 1, wherein the material of the first reinforcing plate and the second reinforcing plate is wood.   2. The ship according to claim 1, wherein the fixing bolt includes a locking hook formed with protrusions engaging with the foreign matter prevention window on the top and bottom, and a screw rod fixed to the locking hook by welding. Sea chest seawater inlet hole dam plate. 2. The sea chest seawater inlet hole weir plate according to claim 1, wherein the elastic packing is made of rubber, urethane resin or other synthetic resin.

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