JPH0584598U - Drainage structure of water jet ship - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a more economical drainage structure for water jet ships that does not require power for drainage. [Structure] The discharge port 8a of the drainage pipe 8 in the ship is connected and opened to the suction pipe 2b of the water jet pipeline 2, and the drainage pipe 8 is provided with a check valve 9 which allows the flow only to the discharge port 8a side. . [Effect] The negative pressure of the propelling water flowing through the water jet pipe is used to suck and drain the water in the drain pipe.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure of a drain pipe for cooling an engine or draining a bottom of a ship in a water jet ship that sucks and ejects seawater to propel it.

[0002]

[Prior Art]

 Conventionally, for example, as shown in FIG. 3, a cooling water piping structure in an engine is connected to a water supply port 31 at the bottom of the ship and a water supply pipe 34 connected to a cooling water pipe 33 of an engine 32, and a cooling water pipe 33 to the bottom of the ship. And a drainage pipe 37 in which a drainage pump 36 is interposed.

[0003]

[Problems to be solved by the device]

 According to the above configuration, drainage is performed by the drainage pump 36, and its power depends on the power generator of the ship.

An object of the present invention is to provide a more economical drainage structure for a water jet ship, which does not require power for draining.

[0005]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention has a discharge port of a drainage pipe in a ship, which is connected to a water jet conduit and has a check valve interposed in the drainage pipe to allow only the discharge side to flow. is there.

[0006]

[Action]

 According to the above configuration, the negative pressure generated by the propulsion water flow flowing through the water jet pipe at the time of navigation can be used to suck and discharge the drainage in the drainage pipe, and the backflow to the drainage pipe can be reversed at the time of berthing. Since it can be prevented by the valve, the power inside the ship can be drained without using the power inside the ship, and the power inside the ship can be saved.

[0007]

【Example】

 An embodiment of the drainage pipe structure of a water jet ship according to the present invention will be described below with reference to FIG.

A water jet conduit 2 penetrating from the bottom of the ship to the stern is formed in the hull 1, and a propeller 3 for propulsion is arranged in a propeller chamber 2a in the middle. The propeller 3 for propulsion is connected to an output shaft of an engine 5 in the hull 1 via a propeller shaft 4.

A water supply pipe 7 whose tip is connected to a water supply port 7 a at the bottom of the ship is connected to the inlet of the cooling water circulation pipe 6 of the engine 5, and a drain pipe 8 is connected to the outlet of the cooling water circulation pipe 6. . The drainage pipe 8 is opened by connecting the discharge port 8a to the suction pipe 2b of the water jet pipe line 2, and a check valve 9 is provided in the middle of the drainage pipe 8 to allow outflow only to the discharge port 8a side. ing.

Reference numeral 11 denotes an auxiliary drainage pipe used when anchoring or stopping a boat, which is branched on the upstream side of the check valve 9 of the drainage pipe 8 and has a discharge port 11a connected to the bottom of the ship. A drainage pump 12 is interposed in the auxiliary drainage pipe 11, and cooling water can be sucked and discharged by the power of the drainage pump 12.

According to the above configuration, the propeller 3 for propulsion is rotated by the engine 5 during navigation, and seawater is guided and injected from the suction pipe 2b to the injection pipe 2c through the propeller chamber 2a to propel the hull 1. At this time, since the suction pipe 2b has a negative pressure due to the flow of the propelling water, the cooling wastewater in the drainage pipe 8 is sucked and discharged, and further the cooling seawater is sent to the cooling water circulation pipe 6 by the water supply pipe 7. Further, when the ship is docked or anchored, the drainage pump 12 is driven to discharge the cooling water through the auxiliary drainage pipe 11, and the cooling water is sucked from the water supply pipe 7.

According to the above-described embodiment, since the cooling water can be sucked and discharged by utilizing the negative pressure of the water jet pipe line 2 during navigation, power can be saved and energy-saving navigation can be performed. .

FIG. 2 shows another embodiment in which this drainage pipe structure is adopted for drainage of the bottom of a ship. The drain pipe 21 connected to the drain port 23 in the bottom of the ship is opened with the discharge port 21a being connected to the suction pipe 2b of the water jet conduit 2, and the reverse port that allows outflow only to the discharge port 21a side in the middle part. The stop valve 22 is interposed. Therefore, since the suction pipe 2b has a negative pressure due to the flow of seawater during navigation, drainage from the bottom of the ship is sucked and discharged from the drain port 23 through the drain pipe 21 to the side of the water jet pipeline 2 without using power. can do.

[0014]

[Effect of the device]

 As described above, according to the drain pipe structure of the water jet ship of the present invention, the negative pressure generated by the propulsion water flow flowing through the water jet pipe during navigation can be used to suck and discharge the drainage in the drain pipe. In addition, since the check valve can prevent the backflow to the drain pipe when the ship is moored, it is possible to drain the water without using the power inside the ship and save the power inside the ship.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of a drainage pipe structure of a water jet ship according to the present invention.

FIG. 2 is a schematic configuration diagram showing a drainage pipe structure of a water jet ship according to another embodiment.

FIG. 3 is a schematic configuration diagram showing a drainage pipe structure of a conventional water jet ship.

[Explanation of symbols]

 1 Hull 2 Water Jet Pipeline 2a Propeller Room 2b Suction Pipe 3 Propulsion Propeller 5 Engine 6 Cooling Water Circulation Pipe 7 Water Supply Pipe 8 Drain Pipe 8a Discharge Port 9 Check Valve 11 Auxiliary Drain Pipe 12 Drain Pump 21 Drain Pipe 21a Discharge Port 22 Check valve

Claims (1)

[Scope of utility model registration request] 1. A water jet ship characterized in that a discharge port of a drainage pipe in a ship is connected and opened to a water jet pipe line, and a check valve which allows a flow only to the discharge port side is interposed in the drainage pipe. Drain pipe structure.