JP6793015B2 - Liquid leakage prevention device for ship storage tanks - Google Patents

Description

The present invention relates to a liquid leakage prevention device for a ship's storage tank.

The EGR (Exhaust Gas Recirculation) system is applied to the main engine as a measure against the NOx tertiary regulation, which is the international regulation (MARPOL) for internal combustion engines mounted on ships. In this EGR system, a part of the combustion gas discharged from the main engine cylinder is mixed with the combustion air again and burned again in the cylinder to reduce NOx. Here, if the sulfuric acid contained in the combustion gas is led into the cylinder as it is, the inside of the cylinder may be exposed to a corrosive environment. Therefore, NaOH (hereinafter referred to as caustic soda) is supplied for the purpose of neutralizing the sulfuric acid. Is common. This caustic soda requires caution because it is treated as a deleterious substance. For example, when a storage tank containing caustic soda is installed in the engine room, it is necessary to deal with the leakage of caustic soda.

Here, a technique for dealing with leakage of toxic ammonia water, which is not caustic soda, is described in Patent Document 1 below. The one described in Patent Document 1 is adopted in an SCR (Selective Catalytic Reduction) system, and houses a reducing agent storage tank for storing ammonia water as a NOx reducing agent in a reducing agent storage tank room 2 A heavy tank structure is adopted to prevent the ammonia water from leaking into the ship even if it leaks from the reducing agent storage tank.

Further, in Patent Document 2 below, a tank storage chamber is provided in one corner inside a counterweight provided on the vehicle body frame, and a urea water tank for storing urea water as a NOx reducing agent is provided in the tank storage chamber. The double tank structure is described.

Japanese Unexamined Patent Publication No. 2012-82796 Japanese Unexamined Patent Publication No. 2009-250168

However, in Patent Documents 1 and 2, it is not assumed that all the ammonia water and urea water leak when the inner tank is damaged, and therefore, the ammonia water and urea water overflow from the outer tank. There is a risk of leakage. In particular, in Patent Document 1, ammonia water leaks into the ship, and even in Patent Document 2, urea water leaks out of the counterweight. In addition, there is also a problem that manufacturing is troublesome because of the double structure in which the tank is installed in the tank.

The present invention has been made to solve such a problem, and is applied to a storage tank that stores a liquid such as caustic soda and ammonia water and is mounted on a ship, and the liquid in the storage tank is inside the ship. It is an object of the present invention to provide a liquid leakage prevention device that can be easily manufactured while preventing leakage to.

The liquid leakage prevention device for the storage tank of a ship according to the present invention is a liquid leakage prevention device for preventing the liquid in the storage tank mounted on the ship from leaking into the ship, and is formed by combing at the lower part of the tank. It is characterized by having a combing space that can accommodate the entire amount of liquid when the entire amount of liquid inside leaks.

According to the liquid leakage prevention device for the storage tank of a ship according to the present invention, even if the liquid in the storage tank leaks, the entire amount of the liquid in the storage tank is stored in the combing space formed by combing at the bottom of the storage tank. it can. Therefore, it is possible to prevent the liquid in the storage tank from leaking into the ship. Further, since the combing space for accommodating the entire amount of the liquid is formed by combing at the lower part of the placing tank, it is easy to manufacture.

Here, as a configuration that preferably plays the above action, specifically, the combing space includes a deck, a side combing that is coupled to the deck and surrounds from the side, and an upper combing that is coupled to the side combing and covers from above. The upper combing is equipped with a placing tank, and a flow opening is provided to allow the liquid leaked from the placing tank to flow down into the combing space, and the side combing is higher than the upper combing. A configuration having an upper end portion can be mentioned. When such a configuration is adopted, the upper end of the side combing protrudes upward from the upper combing on which the placing tank is mounted, so that the upper end serves as a weir and the liquid leaking from the placing tank is on the side. It can be easily accommodated in the combing space by flowing down from the flow-down opening provided in the upper combing without flowing down from the partial combing.

In addition, as another configuration that exerts the above action, the combing space is coupled to the deck and surrounded from the side, the upper combing that is coupled to the side combing and covers from above, and the combing space that is coupled to the side combing from below. Formed by a lower combing that covers, the upper combing is equipped with a placing tank and is provided with a flow opening that allows the liquid leaked from the placing tank to flow down into the combing space, and the side combing projects upward from the upper combing. A configuration having a raised upper end is also included.

Further, it is preferable that the combing space is provided with a pot for storing the liquid flowing down from the flow-down opening to a predetermined amount, and is provided with a leak detection device for detecting the leakage of the liquid according to the amount of the liquid in the pot. When such a configuration is adopted, the liquid leaked from the storage tank flows down from the flow-down opening and is stored in the pot, and the leak detection device detects the liquid leakage according to the amount of the liquid. It is possible to notify the crew of the leak and take appropriate measures quickly.

Further, if the upper combing is further provided with an upper opening that makes the combing space visible, it is possible to confirm (discover) that the liquid in the placing tank has leaked by visual inspection through the upper opening.

According to the present invention as described above, it is possible to provide a liquid leakage prevention device that can be easily manufactured while preventing the liquid in the storage tank from leaking into the ship.

It is a perspective view which shows the liquid leakage prevention device of the storage tank of a ship which concerns on 1st Embodiment of this invention. It is a top view of the liquid leakage prevention device shown in FIG. It is a cross-sectional view of III-III of FIG. 2, and is also a cross-sectional view showing the inside of a placing tank and a pot. It is a top view which shows the liquid leakage prevention device of the storage tank of a ship which concerns on 2nd Embodiment of this invention. It is a VV cross-sectional view of FIG. 4, and is also a cross-sectional view showing the inside of a placing tank and a pot. It is a top view which shows the liquid leakage prevention device of the storage tank of a ship which concerns on 3rd Embodiment of this invention. FIG. 6 is a sectional view taken along line VII-VII of FIG. 6, which also shows the inside of a placing tank and a pot. It is a top view which shows the liquid leakage prevention device of the storage tank of a ship which concerns on 4th Embodiment of this invention. FIG. 8 is a cross-sectional view taken along the line IX-IX of FIG. 8, which also shows the inside of the placing tank and the pot. It is a perspective view which shows the liquid leakage prevention device of the storage tank of a ship which concerns on 5th Embodiment of this invention. It is an exploded perspective view which shows the liquid leakage prevention device of the storage tank of a ship which concerns on 6th Embodiment of this invention. It is an exploded perspective view which shows the liquid leakage prevention device of the storage tank of a ship which concerns on 7th Embodiment of this invention. It is a perspective view which shows the liquid leakage prevention device of the storage tank of a ship which concerns on 8th Embodiment of this invention. It is a perspective view which shows the liquid leakage prevention device of the storage tank of a ship which concerns on 9th Embodiment of this invention. It is a perspective view which shows the liquid leakage prevention device of the storage tank of a ship which concerns on 10th Embodiment of this invention.

Hereinafter, a preferred embodiment of the liquid leakage prevention device for a ship placing tank according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a liquid leakage prevention device for a ship placing tank according to the first embodiment of the present invention, FIG. 2 is a plan view of the liquid leakage prevention device, and FIG. 3 is a sectional view taken along line III-III of FIG. It is a cross-sectional view which also shows the inside of the placing tank and a pot. In each figure, the same elements are designated by the same reference numerals, and duplicate description will be omitted.

The liquid leakage prevention device for the storage tank of the present embodiment is applied to the EGR system of the ship, and is for preventing the caustic soda contained in the storage tank from leaking into the ship.

As shown in FIGS. 1 to 3, the liquid leakage prevention device 100 includes a combing 2 provided in the lower part of the storage tank 1, and the storage tank 1 and the combing 2 are here in the engine room (engine room). ) Is placed.

The storage tank 1 is configured in a box shape having an upper part, a side part and a lower part, and internally contains caustic soda used for the EGR system. An inspection manhole 3, a caustic soda intake pipe 4, and an air bleeding pipe 5 are provided on the upper part of the storage tank 1.

The combing 2 installed in the lower part of the storage tank 1 forms a combing space S having a volume capable of accommodating the entire amount of caustic soda when the entire amount of caustic soda in the storage tank 1 leaks. In the combing 2, the caustic soda in the combing space S does not spill upward even if there is a side combing 6 that serves as a weir that prevents the caustic soda in the combing space S from spilling to the side and the hull is shaken (rolling, pitching, trimming, etc.). The upper combing 7 serving as a weir is provided, and the space surrounded by the deck D, the side combing 6, and the upper combing 7 is referred to as a combing space S.

The side combing 6 is formed in a rectangular shape and a plate shape, surrounds all four sides so as to form a rectangular shape in a plan view, and is joined on the deck D by welding. The upper combing 7 is formed in a rectangular shape and a plate shape, and is joined to the inner surface of the side combing 6 by welding so that the upper end portion 6a of the side combing 6 projects upward by a predetermined length. The upper end portion 6a of the side combing 6 that protrudes upward from the upper combing 7 and rises functions as a weir that prevents the caustic soda leaked from the placing tank 1 from flowing out.

The upper combing 7 is provided with a flow-down opening 7a for allowing caustic soda leaked from the placing tank 1 to flow down to the combing space S, and an upper opening 11 for making the combing space S visible.

Here, four flow-down openings 7a are provided so as to be arranged side by side in the front-rear direction and left-right, and a concave pot 9 is provided inside (lower side) of the upper combing 7 so as to surround the penetrating flow-down opening 7a. The pot 9 forms a part of the combing space S and stores caustic soda flowing down from the flow-down opening 7a to a predetermined amount. A leak detection device 10 for detecting the leakage of caustic soda is provided in the pot 9. The leak detection device 10 is a float switch here, and when the caustic soda leaked from the placing tank 1 flows down from the flow opening 7a and the caustic soda accumulates in the pot 9, the float 10a is buoyant according to the amount of the caustic soda liquid. By moving upward, for example, an alarm or the like is activated.

An outflow port 9a for flowing out the caustic soda in the pot 9 to the outside is provided on the side portion of the pot 9 when a predetermined amount or more of caustic soda leaks. A drain cock 9b is provided at the bottom of the pot 9. The drain cock 9b can be operated by a crew member from the upper opening 11 to allow caustic soda in the pot 9 to flow down into the combing space S. If the drain cock 9b is provided on the side portion of the pot 9 on the upper opening 11 side, the operability of the drain cock 9b can be further improved.

Incidentally, a well may be recessed in the deck D, and a float switch may be provided so that the float 10a enters the well. Further, the pot 9 is arranged on the deck D, a scapper (drainage port) is provided in the upper combing 7 above the pot 9, and a pipe hanging from the scapper into the pot 9 is provided, and caustic soda leaked from the placing tank 1. May flow down into the pot 9.

Further, the upper opening combing 12 is joined to the upper combing 7 by welding so as to surround the periphery of the upper opening 11. The upper opening 11 is for surely visually recognizing the caustic soda that has flowed down from the outlet 9a of the pot 9 and has entered the combing space S, and for entering and exiting when performing work such as welding and cleaning in the combing space S. .. The height of the upper opening combing 12 is lower than that of the upper end 6a of the side combing 6. It is preferable to provide the combing space S and the upper opening 11 at a position where the sway is the least with respect to the assumed sway of the hull. Incidentally, the upper opening 11 may be covered with, for example, grating.

Then, the tank 1 is placed on the upper combing 7 and is joined by welding. The supply pipe 13 for supplying caustic soda from the storage tank 1 to the EGR system protrudes from the storage tank 1 and bends downward to enter the combing space S from the upper opening 11 and extends to the EGR system through the deck through flange 14. There is. The supply pipe 13 for supplying caustic soda from the storage tank 1 to the EGR system may be watertightly extended from the side combing 6.

Incidentally, tapes for preventing the scattering of caustic soda are provided on the welded portion of the supply pipe 13 extending from the placing tank 1, the flange portion and the valve portion 15 connecting the supply pipes, the welded portion of the placing tank 1 itself, and the like. Alternatively, it is preferable to provide a heat insulating material such as rock wool to prevent scattering. Further, it is preferable that the side combing 6 and the storage tank 1 are provided with steps so that they can go up and down.

According to the first embodiment having such a configuration, when the caustic soda of the placing tank 1 leaks, the upper end portion 6a of the side combing 6 projects upward from the upper combing 7 on which the placing tank 1 is mounted and becomes a weir. Therefore, the leaked caustic soda flows down from the flow-down opening 7a provided in the upper combing 7 without flowing down from the side combing 6, and is stored in the pot 9 forming a part of the combing space S. Even if there is a leak from the supply pipe 13, the flange portion, the valve portion 15, or the like, the caustic soda reaches the combing space S through the upper opening 11. Further, the upper combing 7 may reach the flow-down opening 7a.

Then, when caustic soda begins to accumulate in the pot 9, the leak detection device 10 detects the leak according to the amount of the caustic soda, and for example, an alarm or the like is activated to notify the crew of the leak of the caustic soda.

Here, when the leakage of caustic soda from the storage tank 1 continues and the amount of caustic soda in the pot 9 exceeds a predetermined amount, the caustic soda flows down from the outlet 9a of the pot 9 and is accumulated in the combing space S. Further, when the amount of caustic soda leaked from the storage tank 1 is large (the leakage rate is high), the caustic soda not only flows down from the flow-down opening 7a, but also overflows the upper opening combing 12 and flows down the upper opening 11 for combing. It is stored in space S.

Even if the leakage of caustic soda from the storage tank 1 continues in this way and the entire amount of caustic soda in the storage tank 1 leaks, the entire amount of the caustic soda leaked from the storage tank 1 is stored in the combing space S. Become.

Then, the caustic soda accommodated in the combing space S is discharged to the outside through a discharge pipe 16 provided in the lower part of the side combing 6, for example, by a portable Welden pump or the like.

As described above, according to the present embodiment, even if the caustic soda in the storage tank 1 leaks, the entire amount of the caustic soda in the storage tank 1 is accommodated in the combing space S formed by the combing 2 in the lower part of the storage tank 1. Therefore, it is possible to prevent the caustic soda in the storage tank 1 from leaking into the engine room (inside the ship). Further, since the combing space S for accommodating the entire amount of caustic soda is formed by the combing 2 in the lower part of the placing tank 1, it is easy to manufacture.

Further, according to the present embodiment, since the upper end portion 6a of the side combing 6 protrudes upward from the upper combing 7 on which the placing tank 1 is mounted and is higher, the upper end portion 6a serves as a weir from the placing tank 1. The leaked caustic soda can flow down from the flow-down opening 7a provided in the upper combing 7 without flowing down from the side combing 6, and can be easily accommodated in the combing space S.

Further, the caustic soda that leaks from the storage tank 1 and flows down from the flow-down opening 7a and is accumulated in the pot 9 is detected by the leak detection device 10 according to the amount of caustic soda and can be notified to the crew. , It is possible to take appropriate measures quickly.

Further, since the upper combing 7 is provided with an upper opening 11 that makes the combing space S visible, it is confirmed (discovered) that the caustic soda in the placing tank 1 leaked by visual inspection through the upper opening 11. it can.

Further, as a manufacturing method, a method in which the placing tank 1 and the combing 2 are integrated by welding and welded to the deck D can be adopted, so that the manufacturing is further simple.

FIG. 4 is a plan view showing a liquid leakage prevention device for a ship's storage tank according to a second embodiment of the present invention, and FIG. 5 is a cross-sectional view of VV of FIG. 4, which also shows the inside of the storage tank and the pot. Is.

The difference between the second embodiment and the first embodiment is that instead of the plurality of small diameter flow openings 7a of the upper combing 7, a large diameter flow opening 7b having a diameter larger than that of the flow opening 7a is provided, and a large diameter flow opening 7b is provided. A tubular large-diameter flow-off opening combing 7c is erected by welding so as to surround the periphery of 7b, and a plurality of communication openings 7d that communicate inside and outside are provided on the peripheral wall of the large-diameter flow-off opening combing 7c. A flange-shaped flange portion 17 is provided on the upper portion of the large-diameter flow-off opening combing 7c, and a lid portion 18 is provided which is bolted to the flange portion 17 to close the large-diameter flow-off opening 7b from above. Also here, the leak detection device 10 for detecting the leakage of caustic soda according to the amount of caustic soda in the pot 9 is provided on the lid 18 in the same manner as in the first embodiment. Further, the supply pipe 13 for supplying caustic soda from the storage tank 1 to the EGR system is configured to be watertightly placed and extend from the storage tank 1. The valve portion 15 is located above the upper combing 7 in order to deal with leakage from the valve portion 15 of the supply pipe 13.

In such a second embodiment, the caustic soda leaked from the placing tank 1 passes through the communication opening 7d of the peripheral wall of the large-diameter flow-off opening combing 7c, flows down the large-diameter flow-off opening 7b of the upper combing 7, and reaches the pot 9. Although it is a flow, it goes without saying that the same effect as that of the first embodiment can be obtained.

In addition, according to the second embodiment, by removing the lid portion 18, the inside of the pot 9 can be cleaned through a large-diameter flow-off opening 7b having a size sufficient for cleaning the inside of the pot 9. In addition, welding work and painting work become easier even at the time of manufacturing.

FIG. 6 is a plan view showing a liquid leakage prevention device for a ship placing tank according to a third embodiment of the present invention, and FIG. 7 is a sectional view taken along line VII-VII of FIG. 6, which also shows the inside of the placing tank and the pot. It is a sectional view.

The difference between the third embodiment and the first embodiment is that the upper combing 7 has an overhanging portion 7e that is projected from one side of the side combing 6 in a rectangular shape, and the overhanging portion 7e This is a point where the flow-down opening 7a is relocated and the pot 9 is relocated to the lower side of the overhanging portion 7e. Similarly, the leak detection device 10 has also been relocated.

Further, an upper end portion 6b of the side combing 6 that extends and functions as a weir is provided so as to surround the overhanging portion 7e from the outside (three sides). The upper end portion 6b of the side combing 6 is provided so as to be connected to the upper end portion 6a of the side combing 6. Further, the wall on the side combing 6 side (left side in the drawing) of the pot 9 is also used as the side combing 6, and the pot 9 contains a predetermined amount or more of caustic soda in the portion of the side combing 6 which is also used. When it accumulates in the pot 9, the outlet 6c for flowing down from the pot 9 and accumulating in the combing space S is opened. Further, a drain cock 9b is provided at the bottom of the pot 9.

In such a third embodiment, the caustic soda leaked from the placing tank 1 reaches the overhanging portion 7e of the upper combing 7, flows down the flow-down opening 7a, and reaches the pot 9, but is the same as the first embodiment. Needless to say, it is possible to obtain various effects.

In addition, according to the third embodiment, since the pot 9 is outside, the drain cock 9b at the bottom can be easily operated, and the caustic soda of the pot 9 can be easily taken out to the outside.

FIG. 8 is a plan view showing a liquid leakage prevention device for a ship placing tank according to a fourth embodiment of the present invention, and FIG. 9 is a sectional view taken along line IX-IX of FIG. 8, which also shows the inside of the placing tank and the pot. It is a sectional view.

The difference between the fourth embodiment and the third embodiment is that the upper combing 7 is not provided with the overhanging portion 7e, but the side combing 6 has the same configuration as the first embodiment, that is, a rectangular shape in a plan view. The upper end portion 6a is connected to the upper part of the entire side combing 6 to be formed, and the upper combing 7f having the same shape as the overhanging portion 7e is provided on one side of the side combing 6 and the flow opening 7a is provided. This is a point where the pot 9 is provided below the upper combing 7f. Further, here, a plurality of communication holes 6d for communicating the upper combing 7f side and the upper combing 7 side are provided at the upper end portion 6a of the side combing. Further, as in the third embodiment, the upper end portion 6b of the pot 9 that functions as an extending weir is provided so as to surround the upper combing 7f from the outside (three sides).

In such a fourth embodiment, the caustic soda leaking from the placing tank 1 reaches the upper combing 7f through the communication hole 6d, flows down the flow-down opening 7a, and reaches the pot 9. Needless to say, the same effect can be obtained.

In addition, according to the fourth embodiment, the pot 9 with the upper combing 7f may be manufactured and bonded to the side combing 6 by welding, so that the pot 9 can be manufactured more easily.

FIG. 10 is a perspective view showing a liquid leakage prevention device for a ship placing tank according to a fifth embodiment of the present invention.

The difference between this fifth embodiment and the first embodiment is that the side combing 6 is joined on the deck D by welding, and the position at a constant height on the inner surface of the side combing 6 with respect to the side combing 6. The lower combing 20 having a rectangular shape in a plan view is joined by welding, and the combing space S is formed by the side combing 6, the lower combing 20, and the combing 22 by the upper combing 7. The combing space S can accommodate the entire amount of caustic soda in the storage tank 1 as in each of the above embodiments. Further, here, the center of the bottom of the side combing 6 in the front-rear direction has a concave shape separated from the deck D.

Needless to say, even in such a fifth embodiment, the same effect as that of the first embodiment can be obtained. The discharge pipe 16 may be arranged below the lower combing 20 and may be bent upward to be connected through the lower combing 20 to communicate with the combing space S. By adopting such a configuration, the residual amount of caustic soda in the combing space S can be reduced. In addition, by inclining the lower combing 20 toward the discharge pipe 16, the residual amount of caustic soda can be further reduced.

FIG. 11 is an exploded perspective view showing a liquid leakage prevention device for a ship placing tank according to a sixth embodiment of the present invention.

The difference between this sixth embodiment and the first embodiment is that the flange portion 6e protruding inward is joined to the upper portion of the side combing 6 by welding, the upper combing 7 is placed on the flange portion 6e, and the upper combing is performed. This is a point where the flange portion 6e of the side combing 6 and the flange portion 6e of the side combing 6 are bolted together.

Needless to say, even in such a sixth embodiment, the same effect as that of the first embodiment can be obtained, and in addition, after the side combing 6 is joined to the deck D by welding, Since the upper combing 7 can be bolted to the side combing 6, it is relatively easy to manufacture.

FIG. 12 is an exploded perspective view showing a liquid leakage prevention device for a ship placing tank according to a seventh embodiment of the present invention.

The difference between the 7th embodiment and the 1st embodiment is that the flange portion 6f protruding outward is joined to the lower part of the side combing 6 by welding, and another side combing 6g is welded on the deck D. Further, the flange portion 6h protruding outward is joined to the side combing 6g by welding, and the flange portion 6f of the side combing 6 is placed on the flange portion 6h of the side combing 6g, and the side combing is performed. This is a point where the flange portion 6h of 6 g and the flange portion 6f of the side combing 6 are bolted together. In this case, it is necessary to insert packing or the like between the flange portions 6f and 6h to make the flange portion watertight.

Needless to say, even in such a seventh embodiment, the same effect as that of the first embodiment can be obtained. In addition, as in the sixth embodiment, side combing is performed on the deck D. After 6 g are joined by welding, the side combing 6 to which the upper combing 7 is welded can be bolted, so that the production is relatively easy.

FIG. 13 is a perspective view showing a liquid leakage prevention device for a ship placing tank according to an eighth embodiment of the present invention.

The difference between the eighth embodiment and the first embodiment is that the supply pipe 13, the flange portion and the valve portion 15 from the placing tank 1 are arranged in the combing space S.

It goes without saying that the same effect as that of the first embodiment can be obtained even in such an eighth embodiment, and in addition, caustic soda is obtained from the flange portion and the valve portion 15 that connect the supply pipes to each other. Even if it scatters, it can be collected in the combing space S, and it is possible to avoid scattering to the outside. The valve portion 15 can be operated through the upper opening 11. Further, since the supply pipe 13 can be connected to the bottom of the storage tank 1, it is possible to reduce the amount of caustic soda left behind in the storage tank 1. Therefore, the wiping work at the time of cleaning the inside of the placing tank 1 can be reduced.

FIG. 14 is a perspective view showing a liquid leakage prevention device for a ship placing tank according to a ninth embodiment of the present invention.

The difference between the ninth embodiment and the eighth embodiment is that the upper combing 7 is tilted, and along with this change, a flow-down opening 7a and a pot 9 are provided at the tilted tip where the height is lowered. This is the point.

Needless to say, even in such a ninth embodiment, the same effect as that of the eighth embodiment can be obtained, and in addition, the accumulation and detection of leaked caustic soda can be accelerated. Further, since the bottom of the storage tank 1 is also inclined, it is possible to minimize the amount of caustic soda left behind in the storage tank 1. In the 8th and 9th embodiments, the supply pipe 13 from the storage tank 1 and the flange portion and the valve portion 15 are arranged in the combing space S, but such a configuration can be applied to other embodiments. It can also be applied to.

FIG. 15 is a perspective view showing a liquid leakage prevention device for a ship placing tank according to a tenth embodiment of the present invention.

The difference between the tenth embodiment and the first embodiment is that the pot 9 is provided not in the upper combing 7 but in the side combing 6, and the caustic soda flowing down from the flow opening 7x is detected by the leak detection device 10. is there. Here, the flow-down opening 7x is made larger than the flow-down opening 7a of the first embodiment.

Needless to say, even in such a tenth embodiment, the same effect as that of the first embodiment can be obtained, and in addition, various types of leakage detection devices can be selected. Further, by combining with the inclined upper combing 7 of the ninth embodiment, leakage of caustic soda can be detected even faster.

Although the present invention has been specifically described above based on the embodiment, the present invention is not limited to the above embodiment, and the configuration of each of the above embodiments is described, including the arrangement configuration of the supply pipe 13 and the like. It is possible to combine them as appropriate.

Further, the upper combing 7 can be a part (lower part of the placing tank) constituting the placing tank 1.

Further, in the above embodiment, the example in which the caustic soda used as the neutralizing agent of the EGR system is contained in the placing tank 1 is described, but in the case of accommodating an alkaline neutralizing agent or a reducing agent other than the caustic soda. Can also be applied to. Further, the liquid leakage prevention device 100 of the present invention can be applied to SCR, and it can also be applied to the case where ammonia water or urea water used as a reducing agent for SCR is stored in the storage tank 1. Further, it can be applied to the case where the storage tank 1 contains lubricating oil, cooling water, fuel and the like. Then, an appropriate temperature control device can be equipped depending on the liquid contained in the storage tank 1. Further, the liquid leakage prevention device 100 is not limited to the engine room, but may be the steering room or the like, and is not limited to the inside of the ship.

1 ... Placement tank, 2 ... Combing, 6,6g ... Side combing, 6a, 6b ... Upper end of side combing, 7,7e, 7f ... Upper combing, 7a, 7b, 7x ... Flow opening, 9 ... Pot, 10 ... leak detection device, 11 ... upper opening, 20 ... lower combing, 100 ... liquid leakage prevention device, D ... deck, S ... combing space.

Claims (5)

It is a liquid leakage prevention device that prevents the liquid in the storage tank mounted on the ship from leaking into the ship.
It is formed by combing at the lower part of the storage tank, and has a combing space capable of accommodating the entire amount of the liquid in the storage tank when the entire amount of the liquid leaks .
The combing space is formed by a deck, a side combing that is coupled to the deck and surrounds from the side, and an upper combing that is coupled to the side combing and covers from above.
A liquid leakage prevention device for a ship's storage tank, characterized in that the storage tank is mounted on the upper combing . The upper combing is provided with a flow opening for allowing the liquid leaked from the storage tank to flow down into the combing space.
The liquid leakage prevention device for a ship's storage tank according to claim 1, wherein the side combing has an upper end portion that protrudes upward and is higher than the upper combing. The combing space is formed by a side combing that is coupled to the deck and surrounds from the side, an upper combing that is coupled to the side combing and covers from above, and a lower combing that is coupled to the side combing and covers from below.
The upper combing is provided with the storage tank and a flow opening for allowing the liquid leaked from the storage tank to flow down into the combing space.
The liquid leakage prevention device for a ship placing tank according to claim 1, wherein the side combing has an upper end portion that protrudes upward and is higher than the upper combing. The combing space is provided with a pot for storing the liquid flowing down from the flow-down opening to a predetermined amount.
The liquid leakage prevention device for a ship's storage tank according to claim 2 or 3, further comprising a leak detection device that detects the leakage of the liquid according to the amount of the liquid in the pot. The liquid leakage prevention device for a ship's storage tank according to any one of claims 2 to 4, wherein the upper combing is further provided with an upper opening that makes the combing space visible.

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