JPH0681893U - Cooling water discharge structure of ship - Google Patents

Abstract

(57) [Summary] [Structure] In order to prevent water flow parallel to the hull from passing near the discharge port 5, the discharge port 5 should be gradually separated from the hull side A toward the stern side B from the hull. The plate-like avoiding body 6 arranged at an inclination was attached. [Effect] The avoidance body is arranged so that it gradually separates from the hull from the bow side of the discharge port toward the stern side, so that the direction of the water flow changes smoothly during sailing.
Without increasing the hull resistance during navigation, the flow of water is avoided by the avoidance body during navigation and the discharge port becomes negative pressure, and the cooling water taken in by dynamic pressure is efficiently discharged from the discharge port. can do.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cooling water discharge structure for discharging cooling water for a condenser used in a drive engine of a ship to the outside of the ship.

[0002]

[Prior art]

 BACKGROUND ART Conventionally, there is a scoop that takes in cooling water (for example, seawater) for cooling a condenser used for a drive engine of a ship into the ship and discharges the cooled water to the outside of the ship. This scoop uses the relative motion between the hull and seawater (the water pressure that the hull receives from seawater) to take in cooling water into the ship without using power such as a pump. , And has a discharge port for discharging the cooling water after cooling to the outside of the ship.

In order for this scoop to function efficiently, the intake port is arranged at a position where a large positive dynamic pressure is applied to the surface of the hull, and the discharge port is negative (negative) on the surface of the hull. It is suitable to place it in the position.

By the way, various proposals have been made regarding the structure of the inlet portion of the cooling water, and regarding the structure of the outlet portion, as shown in FIG. 8, the outlet passage 40 is simply formed at a right angle to the ship side portion 41. There is one in which the discharge port 42 is formed by being provided in the direction.

However, in the discharge part structure in which the discharge port 42 is simply formed in the side part 41 of the ship, a water flow W is generated along the side part 41 of the ship due to the navigation of the ship, and the dynamic pressure due to this flow causes cooling after cooling. The drainage of water Wa is hindered and the drainage efficiency is poor.

Therefore, as shown in FIGS. 9 and 10, a baffle plate 44 is provided along the periphery of the discharge port 42 in a direction perpendicular to the side part 41 of the ship, so that the movement of the discharge port 42 portion occurring during traveling is prevented. There is something to reduce the pressure.

[0007]

[Problems to be solved by the device]

 As described above, in the case where the baffle plate 44 is provided along the periphery of the discharge port 42 in the direction perpendicular to the side portion 41 of the ship to reduce the dynamic pressure of the discharge port 42 portion generated during navigation, Since the direction of the flow W of water is rapidly changed by the magic plate 44, there is a problem in that the hull resistance is increased during traveling.

[0008] Therefore, an object of the present invention is to provide a cooling water discharge part structure of a ship that can solve the above problems.

[0009]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the structure of the cooling water discharge part of the ship in the first invention is an inlet for taking in the cooling water of the drive engine by dynamic pressure into the hull, and the cooling water after cooling outside the hull. In a ship having a discharge port for discharging the water, a plate-shaped avoiding member for preventing water flow parallel to the hull from passing near the discharge port when traveling is attached to the hull. The avoidance body is arranged so as to incline from the bow side of the discharge port toward the stern side so as to be largely separated from the hull.

In order to solve the above-mentioned problems, the structure of the cooling water discharge part of the ship according to the second aspect of the invention is such that the cooling water of the driving engine is taken into the hull by dynamic pressure, and the cooling water after cooling. In a ship formed with a discharge opening for discharging the ship to the outside of the hull, a discharge pipe curved toward the stern side is connected to the discharge opening.

[0011]

[Action]

 According to the first invention, the cooling water taken in from the intake port by dynamic pressure reaches the drive engine, cools it, and then is sent to the discharge port side, and the water flow on the hull side while traveling is near the discharge port. At this point, the avoidance body avoids this from the outlet along with this and makes the outlet negative pressure on the stern side, and the cooled cooling water that has reached the vicinity of the outlet is efficiently discharged to the outside of the ship. Be done.

According to the second invention, the cooling water taken in through the intake port by the dynamic pressure reaches the drive engine, and after cooling it, the cooling water is discharged by the discharge pipe curved toward the stern side. Since the water flow on the hull side makes negative pressure on the discharge port of the discharge pipe on the stern side during sailing, the cooling water after cooling is discharged to the outside of the ship very easily and efficiently. It

[0013]

【Example】

 Hereinafter, a first embodiment of a cooling water discharge structure of a ship according to the present invention will be described with reference to an overall schematic side view of the ship of FIG. 1, a horizontal sectional view of an essential part of FIG. 2 and a side view of an essential part of FIG.

In the first embodiment of the present invention, an intake port 2 for taking in cooling water Wa for cooling a drive engine such as a condenser 1 mounted on a hull S is formed in a front portion of a ship bottom plate 1A, The intake port 2 is connected to the front part of the cooling water channel 3 arranged in the hull S, the condenser 1 is arranged in the middle of the cooling water channel 3, and the rear part of the cooling water channel 3 is as shown in FIG. In addition, it is connected in a direction perpendicular to an outlet 5A formed at the rear of the side plate 4.

An avoidance body 6 is fixed to the ship side plate 4 to prevent the flow of the seawater W parallel to the ship side plate 4 from passing near the discharge port 5A at the time of traveling. The fixed portion 6a fixed to the bow side A of the discharge port 5A and the inclined portion are arranged so as to be largely separated from the side plate 4 toward the stern side B from the rear end of the fixed portion 6a. As shown in FIG. 3, an inclined portion 6b formed in a larger area than the discharge port 5A, and a horizontal portion 6c arranged from the upper and lower end portions of the inclined portion 6b toward the side plate 4 surface. And an opening 7A is formed in the rear portion of the avoidance body 6.

Further, while the diameter of the discharge port 5A is D, the slope length of the inclined portion 6b is 1.5D, and the distance from the rear end of the fixed portion 6a to the discharge port 5A is about 1 / 4D. It is set.

Next, the operation will be described. Cooling water Wa taken in through the intake port 2 by dynamic pressure due to the traveling of the ship S is guided to the cooling water passage 3 and reaches the condenser 1 to cool the condenser 1. After that, it is sent to the discharge port 5A side.

By the way, the flow of seawater W during traveling is along the side plate 4 from the bow to a position before the cooling water discharge part, but when it reaches the vicinity of the cooling water discharge part, the slope part 6b avoids the outward flow along this and further flows to the stern side B, and the opening 7A becomes negative pressure, whereby the cooling water Wa reaching the vicinity of the discharge port 5A is attracted to the opening 7A side, and this opening The cooling water Wa after cooling is efficiently discharged from 7A toward the stern side B.

That is, the cooling water Wa introduced by the dynamic pressure is efficiently discharged from the opening 7A by the negative pressure acting near the opening 7A. Further, the direction of the flow of the seawater W changes smoothly due to the inclined portion 6b, so that there is almost no increase in hull resistance during traveling.

Next, a second embodiment of the present invention will be described based on the horizontal sectional view of the main part of FIG. 4 and the side view of the main part of FIG. The second embodiment of the present invention is similar to the first embodiment shown in FIG. 1, in the front portion of the ship bottom plate 1A, cooling water Wa for cooling the drive engine such as the condenser 1 mounted on the hull S. An intake port 2 for taking in is formed, and the intake port 2 is connected to the front part of the cooling water channel 3 arranged in the hull S, and the condenser 1 is arranged in the middle of the cooling water channel 3. As shown in FIG. 4, the rear portion of the pipe body 20 forming the cooling water passage 3 is slightly projected in a direction perpendicular to the rear portion of the side plate 4 and is discharged to the tip at the cooling water discharge opening 5B of the protruding portion 20a. A discharge pipe 21 having an outlet 7B and curved toward the stern side B is rotatably connected around a vertical axis 23 via a joint 22.

In the above-mentioned configuration, the cooling water Wa taken in in the same manner as in the first embodiment flows to the discharge port 7B side by the discharge pipe 21 curved toward the stern side B after cooling the capacitor 1. It's getting easier. Therefore, when the seawater W at the time of traveling flows to the stern side B along the outer circumference of the discharge pipe 21 and the discharge port 7B has a negative pressure, the cooling water Wa after cooling is very easily stern along with the flow of the seawater W. It is discharged toward the side B.

Further, according to the second embodiment, since the tubular body having a circular cross section is projected into the seawater and bent toward the stern side B, the direction is smoothly changed along the discharge pipe 21. Sometimes the hull resistance increases very little.

According to the second embodiment of the present invention, by rotating the discharge pipe 21 around the vertical axis 23 according to the flow of the seawater W, it is possible to reduce the resistance during traveling. be able to.

The present invention is not limited to the above embodiment. For example, as shown in FIGS. 6 and 7, a seawater passage hole 30 is formed in the front surface of the curved portion of the discharge pipe 21 in the second embodiment. , A part of the seawater W is passed through the seawater passage hole 30 into the discharge pipe 21 during traveling, and the cooling water discharge opening 5B is set to a negative pressure, so that the cooling water Wa after cooling is part of the seawater W. At the same time, it can be easily discharged toward the stern side B.

[0025]

[Effect of device]

 As described above, according to the first invention, in order to prevent the water flow parallel to the hull from passing near the outlet, the water is gradually separated from the hull from the bow side to the stern side of the outlet. Since the plate-like avoidance body is installed so as to be inclined, the direction of the water flow does not change smoothly during navigation and the hull resistance does not increase, and water flow is avoided by the avoidance body during navigation. As a result, the discharge port becomes negative pressure, and the cooling water can be efficiently discharged from the discharge port.

Further, according to the second invention, since the discharge pipe curved toward the stern side is connected to the cooling water discharge opening, the cooling water after cooling can easily flow toward the stern side. Moreover, the negative pressure at the discharge port makes it extremely easy to discharge toward the stern side.

[Brief description of drawings]

FIG. 1 is an overall schematic side view of a ship showing a first embodiment of the present invention.

FIG. 2 is a horizontal sectional view of the essential parts of the structure of the cooling water discharge part of the ship.

FIG. 3 is a side view of the main part of the same.

FIG. 4 is a horizontal cross-sectional view of an essential part of the structure of the cooling water discharge part of the ship showing the second embodiment of the present invention.

FIG. 5 is a side view of the main part of the same.

FIG. 6 is a horizontal cross-sectional view of the essential parts of the structure of the cooling water discharge part of the ship, showing a modification of the second embodiment of the present invention.

FIG. 7 is a side view of the main part of the same.

FIG. 8 is a horizontal sectional view of an essential part of a conventional cooling water discharge part structure for a ship.

FIG. 9 is a horizontal cross-sectional view of a main part of a cooling water discharge part structure of a ship showing another conventional example.

FIG. 10 is a side view of the main part of the same.

[Explanation of symbols]

 1 condenser 2 intake port 3 cooling water channel 4 ship side plate 5A discharge port 5B discharge opening 6 avoidance body 6a fixed part 6b inclined part 7A opening 7B discharge port 21 discharge pipe A bow side B stern side Wa cooling water

Claims (2)

[Scope of utility model registration request] 1. A ship in which an inlet for taking in cooling water of a drive engine by dynamic pressure and an outlet for discharging cooling water after cooling to the outside of the hull are formed in the hull,
A plate-like avoidance body is attached to the hull to prevent a water stream parallel to the hull from passing near the discharge port when traveling, and the avoidance body is directed from the bow side of the discharge port to the stern side. The cooling water discharge structure of the ship is arranged so as to be gradually separated from the hull in order. 2. A vessel having an intake port for taking in cooling water of a drive engine by dynamic pressure and a discharge opening for discharging cooling water after cooling to the outside of the hull, A cooling water discharge part structure for a ship, wherein a discharge pipe curved toward the stern side is connected to the discharge opening.