JPS61222516A - Apparatus for supplying cooling water of engine for ship - Google Patents

Abstract

PURPOSE:To obtain a cooling water supply apparatus requiring no stoppage of an engine even if clogging is generated, by providing a washing mechanism for removing the clogging of a strainer. CONSTITUTION:Washing water ports 5 are provided to the lower parts of strainer cylinders 20, 20 while washing water drain ports 6 are provided to the upper parts thereof to make it possible to form streams from the washing water ports 5 to the washing water drain ports 6 directed from the bottom parts of strainer nets 21 to the openings thereof. For example, when the lefthand strainer cylinder 20 clogged by ice pieces during use, the change-over of the strainer cylinders 20 is performed by a control apparatus 9 to flow cooling water to the righthand strainer cylinder 20. The lefthand solenoid valve 50 in a return pipeline 51 is opened while a change-over valve 61 is operated to bring the lefthand drain port 6 into communication with the outside of a ship to flow washing water passed through an engine 4 into the lefthand strainer cylinder 20 from the lower side thereof to push up the ice pieces of the strainer net 21 to the opening side to discharge the same from the drain port 6. After clogging was eliminated, the solenoid valve 50 is closed. Next, when the clogging of the righthand strainer cylinder 20 is generated, the same operation as mentioned above is repeated.

Description

[Detailed description of the invention] <Industrial usage total> The present invention relates to a marine engine cooling water supply system.

<Prior Art> Ships such as ice-water vessels are equipped with a device that takes in engine cooling water and supplies it to the engine.

This equipment usually consists of a sea chest, a strainer for removing ice chips, etc., and a suction pump.

However, in conventional ice-sea vessels, there has been a problem in which pieces of ice that have entered from the sea chest can clog the strainer. If the strainer became clogged, the pressure in the suction pump would drop, reducing the amount of water sent to the machinery and engines, so it was necessary to stop the main engine and disassemble the strainer for cleaning.

Therefore, conventional methods have been proposed, such as making the intake port of the sea chest smaller to prevent ice pieces from entering, melting the ice pieces inside the sea chest, or separating the ice pieces by floating them inside the sea chest. has been done.

However, at present, even with these methods, it is not possible to completely prevent clogging of the strainer.

<Summary of the Invention> The present invention has been made to solve the problems of the prior art described above, and by providing a cleaning mechanism to remove blockages in the strainer, it is not necessary to stop the engine even if blockages occur. In other words, in the present invention, a strainer is provided with a strainer cleaning water port and a discharge port, so that the strainer can be cleaned as needed. .

<Example> Embodiments of the present invention will be described below based on the drawings.

The sea chest (1) takes in seawater from outside the ship and sends it to the strainer (2) via the conduit QQ'). The strainer (2) is then connected to the pump (3) by a pipe line.
Furthermore, it is connected to the engine (4) via a pipe (40). After cooling the engine (4), the cooling water is discharged from the exhaust pipe (4).
1) Discharged overboard via yi.

The strainer (2) consists of a pair of strainer screens, in which a strainer net Q]) (c) is installed with the opening facing upward, and the cooling water sucked from the suction port (a) (a) is passed through the strainer net (ha). ) al) is discharged from the upper discharge port (2) (2) to the pipe line -.

The inlet (2) (2) is connected to the pipe Q (l) via a three-way solenoid valve (3). By switching the solenoid valve (c), the cooling water is strained and It has a so-called dual structure where it can flow into either direction and use the pry tube HH selectively.

Each strainer tube t2iJ is provided with a washing water port (5) at the bottom and a drain port (6) above, so that a flow can be formed from the washing water port (5) to the drain port (6). There is. As will be described later, this flow is from the bottom of the strainer net (C) toward the opening, allowing ice pieces trapped in the strainer net (C) to be discharged.

The cleaning water port (5) is connected to the engine (
A return pipe (51) connected to the cooling water discharge side of 4) is connected. Further, a discharge pipe (60) communicating with the outside of the ship is connected to the discharge port (6). This discharge pipe is equipped with a switching solenoid valve (61) for communicating either of the discharge ports (6) (6) to the outside of the ship, and a pressure gauge is installed on the suction side of the suction pump (3). (31) is attached, and its measured values are input to the control device (9).

The control device (9) controls the opening and closing of the solenoid valves (2) (X50X61).

Next, the operation will be explained. First, let us assume that the left-hand strain uniformity is used as shown in FIG.

If the strainer is clogged with ice chips, etc., the suction pressure of the pump (3) decreases, and the measured value of the pressure gauge (31) decreases.In the control device (9), the value of the pressure gauge (31) decreases to a predetermined value. If the strainer/vessel (2) falls below this level, it is determined that a blockage has occurred and a switching signal is output to the three-way switching solenoid valve (c).

This causes the strainer to be switched, and the cooling water flows to the right strainer as shown in FIG. Then, the left electromagnetic valve (50) in the return pipe (51) is opened, and the switching valve (61) is operated to communicate the left side discharge port (6) to the outside of the ship.

As a result, the washing water that has passed through the engine (4) flows in from the bottom of the strainer screen on the left side, pushes up the ice pieces in the strainer net (c) toward the opening side, and discharges them from the discharge port (6).

Allow this cleaning to take place for a few minutes, and once the blockage is gone, close the solenoid valve (50).

Next, if a blockage occurs in the right strainer, repeat the same operation as above.

FIG. 3 shows a flow diagram of the above operation.

Through the above operations, the blockage can be easily removed without stopping the main engine or manually disassembling and cleaning.

<Effects of the Invention> As explained above, according to the marine engine cooling water supply system of the present invention, even if a blockage occurs due to ice chips, etc., the blockage can be easily cleared without stopping the main engine. becomes.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing one embodiment of the device of the present invention, Fig. 2 is an explanatory diagram of its operation, and Fig. 3 is a flow diagram of its operating procedure. (1) Sea chest, (2 )... Strainer, (3
)...Suction pump, (4)...Engine, (5)...
...Washing water port, (6)...Discharge port, (9)...Control device, -...Strain tube, Al...Strain net, @...Suction, inlet, (c)...・Discharge port, (e)... Three-way solenoid valve S (aX)... Pressure gauge, (50) 0.・Solenoid valve, (61)...Switching valve.

Claims (1)

[Claims] Sea Cheest, strainer and cooling water supply port Marine engine cooling water supply system equipped with At the location, The strainer is equipped with a strainer washing water inlet and a discharge outlet. the strainer so that it can be cleaned as needed. Marine engine cooling characterized by Water supply device.