JPH0558138B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a hydraulic speedometer for ships.

[Prior Art] Conventionally, as a water pressure type speedometer for a ship, a pressure receiving port is arranged in the propulsion direction of the ship, and the water pressure acting on the pressure receiving port is received through a water conduit communicating with the pressure receiving port, thereby increasing the speed of the ship. A device that can detect propulsion speed is used.

[Problems to be Solved by the Invention] However, in the conventional water pressure speedometer described above, algae, salt, soil, etc. may clog the pressure receiving port while the ship is running, leading to the inoperability. . In this case, it is necessary to perform complicated work such as cleaning the pressure receiving port while it is installed while submerged in water, or cleaning the pressure receiving port inside the ship after being removed from the mounting position.

An object of the present invention is to make it possible to easily eliminate clogging of a pressure receiving port.

[Means for solving the problems] The present invention provides a pressure receiving port arranged in the propulsion direction of the ship,
In a marine water pressure speedometer that detects the propulsion speed of a ship by receiving water pressure acting on a pressure receiving port through a conduit communicating with the pressure receiving port, the discharge port of an air pump is connected to the conduit. It was designed to do so.

[Function] According to the present invention, it is possible to purge algae and the like that have clogged the pressure receiving port with the air discharged from the air pump, thereby easily eliminating the clogging of the pressure receiving port.

[Embodiment] FIG. 1 is a perspective view schematically showing a first embodiment of the present invention. In this first embodiment, 10 is a ship, a speedometer 11 is provided inside the ship 10, and a pressure receiving part 12 is provided at the submerged part of the stern of the ship 10.
is provided. The pressure receiving part 12 has a pressure receiving port 13 that opens in the propulsion direction of the ship 10. Water pressure acting on the pressure receiving port 13 can be transmitted to a speed display section inside the speedometer 11 via a water conduit 14 communicating with the pressure receiving port 13.

Here, the speedometer 11 is equipped with a manual air pump 1.
5 is attached externally. The air pump 15 is
As shown in the figure, the pump housing 15A includes a pump chamber 16 and a discharge port 17.
A piston 19 integrally connected to the manual knob 18 and a spring 20 for setting the piston 19 to its original position are provided inside the piston 19 . Moreover, the air pump 15 is
A check valve 21 that allows external air to be introduced into the pump chamber 16 is built into the piston 19.

Therefore, the discharge port 17 of the air pump 15
is connected to the intermediate portion of the water conduit 14 via a communication pipe 22.

Therefore, according to the first embodiment, it is possible to supply the discharge air of the air pump 15 to the water conduit pipe 14, and use the discharge air to appropriately purge algae etc. that have clogged the pressure receiving port 13. .

FIG. 3 is a side view schematically showing a second embodiment of the present invention. In this second embodiment, 30 is a ship, a speedometer 31 is provided inside the ship 30, and a pressure receiving part 32 is provided at the submerged part of the stern of the ship 30.
is provided. The pressure receiving portion 32 has a pressure receiving port 33 that opens in the propulsion direction of the vessel 30. Water pressure acting on the pressure receiving port 33 can be transmitted to a speed display section inside the speedometer 31 via a water conduit 34 communicating with the pressure receiving port 33 .

Furthermore, in this second embodiment, the ship 30
An outboard motor 36 is attached to the stern plate 35 of the boat.
The outboard motor 36 connects the clamp bracket 37 to the stern plate 3.
A propulsion unit 39 is supported on a swivel bracket 38, which is fixedly fixed at 5 and is tiltably connected to a clamp bracket 37. Also, outboard motor 36
The cylinder side end of the hydraulic tilt device 40 is connected to the clamp bracket 37, and the piston rod side end thereof is connected to the swivel bracket 38. That is, the outboard motor 36 is operated by the hydraulic tilt device 4.
0, the swivel bracket 38 and propulsion unit 39 can be tilted relative to the clamp bracket 37, that is, can be tilted up and down.

Here, the cylinder body of the hydraulic tilt device 40 includes a pump housing 41 of the air pump 41.
A is fixed. The air pump 41 has the same configuration as the air pump 15 of the first embodiment,
The piston rod 42 is attached to the swivel bracket 3.
It is connected to 8. That is, the air pump 41
The outboard motor 36 is driven in conjunction with the tilt up and down movement of the hydraulic tilt device 40.

Thus, the discharge port of the air pump 41 is connected to the intermediate portion of the water conduit 34 via the communication pipe 43.

Therefore, according to the second embodiment, when the outboard motor 36 is tilted up or down, the discharge air of the air pump 41 is automatically supplied to the water conduit pipe 34, and the pressure receiving port 33 is automatically supplied with the discharge air. It becomes possible to purge algae etc. that are clogged in the water.

FIG. 4 is a side view schematically showing a third embodiment of the present invention. In this third embodiment, 50 is a ship, and a speedometer 51 is provided inside the ship 50. Further, on the stern plate 52 of the vessel 50,
An outboard motor 36 similar to that in the second embodiment is attached.

In the third embodiment, a submerged portion of the propulsion unit 39 of the outboard motor 36 is provided with a pressure receiving port 53 that opens in the propulsion direction of the vessel 50.
Further, a water conduit 54 communicating with the pressure receiving port 53 is provided inside the outboard motor 36, and water pressure acting on the pressure receiving port 53 is transmitted to the pressure converter 56 via a water conduit 55 communicating with the water conduit 54. It is considered possible. A pressure transducer 56 is fixed to the clamp bracket 37 and is adapted to output a voltage proportional to water pressure. The output of the pressure transducer 56 can be transmitted to a speed display section inside the speedometer 51 via a signal line 57.

Here, also in this third embodiment, the outboard motor 3
6 includes a hydraulic tilt device 40 and an air pump 41 as in the second embodiment.

In this third embodiment, the discharge port of the air pump 41 is connected to the intermediate portion of the water conduit 55 via the communication pipe 58.

Therefore, according to the third embodiment, when the outboard motor 36 is tilted up or down, the
The discharge air of the air pump 41 is supplied to the water conduit 55, and the discharge air makes it possible to purge algae and the like that have clogged the pressure receiving port 53.

[Effects of the Invention] As described above, the present invention provides the following advantages: by arranging the pressure receiving port in the propulsion direction of the ship and receiving the water pressure acting on the pressure receiving port via the water conduit communicating with the pressure receiving port,
In a water pressure type speedometer for ships designed to detect the propulsion speed of a ship, the discharge port of an air pump is connected to a water conduit. Therefore, it becomes possible to purge the algae and the like that have clogged the pressure receiving port with the air discharged from the air pump, thereby easily eliminating the clogging of the pressure receiving port.

[Brief explanation of drawings]

FIG. 1 is a perspective view schematically showing an embodiment of the present invention, FIG. 2 is a sectional view showing the internal structure of an air pump, and FIG. 3 is a side view schematically showing a second embodiment of the present invention. FIG. 4 is a side view schematically showing a third embodiment of the present invention. 10,30,50...Ship, 11,31,51
... Speedometer, 13, 33, 53 ... Pressure port, 1
4, 34, 55... Water conduit, 15, 41... Air pump, 17... Discharge port, 54... Water conduit.

Claims (1)

[Claims] 1. A water-pressure speedometer for ships that detects the propulsion speed of a ship by arranging a pressure port in the direction of propulsion of the ship and receiving water pressure acting on the pressure port via a water conduit communicating with the pressure port. A water pressure type speedometer for a ship, characterized in that a discharge port of an air pump is connected to a water conduit.