JP2000025694A - Seawater cooling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of part items and a cost and a ship weight by piping cooling tube group directly inside the tank provided on the lower part of a hull and circulating a medium to be cooled inside the cooling tube group. SOLUTION: A tank 3 in which a seawater is entered by a scoop 2 is provided on the lower part of the hull 1 of a ship. Cooling tube group 4A, 4B are piped directly inside the tank 3 through headers 4a, 4b projected on a tanktop 1a respectively and various kinds of cooling media are circulated inside the cooling tube group 4A, 4B through the piping. Therefore, various kinds of cooling media are thermally exchanged with the seawater directly while concentrating in the tank 3 and cooled. The seawater is introduced into the tank 3 by the scoop 2 while utilizing a ship speed. Therefore, large-scale piping and a pump with a big capacity are dispensed with and by the reduction of the number of parts, a cost is reduced and also a ship weight is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seawater cooling apparatus suitable for a boat such as a high-speed boat and the like, which requires weight reduction, and a small boat such as a fishing boat.

[0002]

2. Description of the Related Art FIG. 6 shows an example of such a cooling apparatus.

[0003] This is a seawater box 10 below the hull 100.
1 from which cooling seawater taken in by a cooling seawater pump 103 through a seawater main pipe 102 is passed through a seawater branch pipe 104 to each of the seawater coolers 105a, 105a in the hull.
5b, the medium to be cooled (fresh water, engine lubricating oil, etc.) circulating in the cooling tube group 106 is cooled (heat exchanged), and then discharged from the discharge port 107 opened in the hull 100. Has become. The seawater main pipe 102 and the seawater branch pipe 104 are appropriately provided with an on-off valve, and a pipe 108 in front of the cooling seawater pump 103 is provided with a filter 108.

[0004]

However, in the cooling device as described above, the seawater main pipe 102 with an on-off valve is provided.
And seawater branch pipe 104, large capacity cooling seawater pump 1
The number of components increases due to the installation of 03, etc., which leads to an increase in cost. In addition, in a high-speed boat or the like, there is a problem that the speed cannot be sufficiently increased due to an increase in the weight of the boat.

SUMMARY OF THE INVENTION An object of the present invention is to provide a seawater cooling device suitable for a high-speed boat or the like, which can reduce the number of parts to reduce cost and ship weight.

[0006]

According to the present invention, there is provided a seawater cooling apparatus having a tank provided with a scoop at a lower portion of a hull, and a pipe group of cooling tubes provided directly inside the tank. The cooling medium group is characterized in that the medium to be cooled circulates inside the cooling tube group.

[0007] Further, a cooling tube group is directly connected to the inside of a seawater box provided on the lower side or lower side of the side of the hull, and the medium to be cooled circulates in the cooling tube group. .

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a seawater cooling device according to the present invention will be described in detail with reference to the drawings using embodiments.

[First Embodiment] FIG. 1 is a side view of a seawater cooling apparatus showing a first embodiment of the present invention.

As shown in the figure, a tank 3 into which seawater is taken in by a scoop 2 is provided below a hull 1 of a ship. The seawater taken into the tank 3 is drained from a discharge port 2a opened to the side of the hull 1 through a pipe or the like.

Inside the tank 3, a plurality of sets (two sets in the figure) of cooling tube groups 4A and 4B are directly piped via headers 4a and 4b projecting above the tank top 1a, respectively. Various cooling media such as fresh water and engine lubricating oil are circulated through the inside of the cooling tube groups 4A and 4B via pipes and the like.

With this configuration, the various cooling media are concentrated in the tank 3 and directly exchanged heat with seawater to be cooled. Then, the seawater is positively introduced into the tank 3 by the scoop 2 using the ship speed (the speed of the ship).

Therefore, a large pipe or a large-capacity pump for taking in seawater or pumping the water to the coolers in various places is not required, and the number of parts can be reduced, thereby reducing the cost and the weight of the ship. .

[Second Embodiment] FIG. 2 is a rear view of a seawater cooling device showing a second embodiment of the present invention, and FIG. 3 is a plan view of the same.

This is an example in which the pump system is combined with the scoop system shown in the first embodiment. That is, the hull 1
A seawater box 10 is provided on the lower side (the side opposite to the discharge port 2a),
From here, seawater is pumped to the tank 3 by the electric pump 11. In the drawings, reference numerals 12a to 12d denote on-off valves interposed in appropriate places, and reference numeral 13 denotes a lip provided at the discharge port 2a for actively draining.

According to this embodiment, when the ship is anchored or at low speed, the pump 11 is driven to forcibly introduce seawater from the seawater box 10 into the tank 3 instead of taking water from the scoop 2 ( (Water intake), and the cooling efficiency at that time can be increased.

In the event of an abnormality such as a tube break in the cooling tube groups 4A and 4B, the on-off and on-off valves 12b, 12d and 12a on the inlet and outlet sides of the tank 3 are closed to allow the cooling seawater in the tank 3 to escape. It has the advantage that it can be inspected and repaired at sea.

Third Embodiment FIG. 4 is a plan view of a seawater cooling device showing a third embodiment of the present invention.

This is an example in which a seawater box 20 in which an inlet 20a and an outlet 20b communicate directly with the sea is formed at the lower side or lower side of the hull 1 and the cooling tube group 4 is directly piped into the seawater box 20. is there.

According to this embodiment, compared to the first and second embodiments, there is an advantage that the seawater piping and accessories are further omitted, and the weight can be reduced and the structure can be simplified.

[Fourth Embodiment] FIG. 5 is a plan view of a seawater cooling device showing a fourth embodiment of the present invention.

The seawater box 30 is formed at the lower side or lower side of the hull 1 with a seawater introduction passage 30a opening at the bow and a seawater drainage passage 30b opening at the stern side connected thereto. This is an example in which a cooling tube group 4 is directly piped.

According to this embodiment, as in the third embodiment, there is an advantage that the seawater piping can be omitted more than in the first and second embodiments. There is also an advantage that seawater can be taken without providing a scoop.

The present invention is not limited to the above embodiments,
It goes without saying that various changes can be made without departing from the gist of the present invention, such as providing a means for preventing marine product adhesion to the cooling tube.

[0025]

According to the first aspect of the present invention, a tank into which seawater is taken in by a scoop is provided at the lower part of the hull, cooling tubes are directly piped into the tank, and the inside of the cooling tubes is cooled. Since the medium is configured to circulate, the number of parts can be reduced by drastically omitting piping with a valve, a cooling seawater pump, and the like, so that cost and weight can be reduced, and water can be taken using the speed of the boat.

According to the second aspect of the present invention, a cooling tube group is directly piped into a seawater box provided on the lower side or lower side of the hull so that the medium to be cooled circulates in the cooling tube group. With this configuration, the number of parts can be reduced by drastically omitting piping with a valve, a cooling seawater pump, and the like, and cost and weight of the ship can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view of a seawater cooling device showing a first embodiment of the present invention.

FIG. 2 is a rear view of a seawater cooling device showing a second embodiment of the present invention.

FIG. 3 is a plan view of the same.

FIG. 4 is a plan view of a seawater cooling device showing a third embodiment of the present invention.

FIG. 5 is a plan view of a seawater cooling device showing a fourth embodiment of the present invention.

FIG. 6 is a schematic configuration diagram of a conventional seawater cooling device.

[Explanation of symbols]

 Reference Signs List 1 hull 2 scoop 3 tank 4, 4A, 4B cooling tube group 10 seawater box 11 pump 12a to 12d on-off valve 13 lip 20 seawater box 30 seawater box

Claims (2)

[Claims] 1. A tank in which seawater is taken in by a scoop is provided at a lower portion of a hull, a cooling tube group is directly piped inside the tank, and a medium to be cooled circulates inside the cooling tube group. A seawater cooling device characterized by the following. 2. A cooling tube group is directly piped into a seawater box provided on the lower side or lower side of the hull, and a medium to be cooled circulates in the cooling tube group. Seawater cooling system.