JP2002211478A - Mooring line monitoring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device capable of remotely monitoring a mooring line for preventing change of a moored position of a vessel (including a floating body such as a platform on the sea) or a direction of a vessel due to breakage or loosening of the mooring line. SOLUTION: For each mooring line of plural mooring winches 5 for mooring a hull to a quay, detection signals from mooring line tension detecting means 21 are collected to one position to be displayed in a tension display means 22. In addition, detected tension values of the respective mooring lines is compared with a standard value, and display of cautions and output of alarm are made by a monitoring means 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a mooring line monitoring device for mooring a ship (including a floating body such as an offshore platform) on a quay (including an offshore mooring column or the like).

[0002]

2. Description of the Related Art Generally, when mooring a ship, a plurality of mooring lines are stretched between the ship and the quay to prevent the ship from leaving the quay. However, the relative position between the ship and the quay changes due to the ebb and flow of the tide, the unloading of the cargo, the change in the wind and the tide, and the tension of the mooring line changes. If this change is too large, one mooring line may break due to excessive tension or another mooring line may loosen, causing the mooring position of the ship to move or changing the direction of the ship. Could be dangerous.

In order to prevent such a situation, an occupant regularly looks around, and if the tension of the mooring line is excessive, the brake of the drum fixing the mooring line is loosened, and conversely, the mooring line is If the cable is loose, the drum holding the mooring line is wrapped around to apply appropriate tension to the mooring line.

[0004] In order to adjust the mooring line tension, it is necessary to periodically circulate the occupants. In addition, there is an auto tension mooring winch that always keeps the tension of the mooring line within a certain range, but it does not work effectively with some mooring lines, for example, mooring lines (spring lines) stretched in the direction of pulling each other. Not enough.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a mooring line for preventing a change in the mooring position of a ship (including a floating body such as an offshore platform) and the direction of the ship due to breakage or loosening of the mooring line. It is an object to provide a device which can be remotely monitored.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a mooring line monitoring device according to the present invention comprises a plurality of mooring winches mounted on a ship, and the tension of the mooring lines from each winch to a berth-side mooring position. A plurality of mooring line tension detecting means for detecting the mooring line tension, and a tension display means for collecting detection signals from the plurality of mooring line tension detecting devices at one place and displaying a detected value of the mooring line tension. In addition, there is provided a monitoring means for comparing the magnitude of the detected tension value with a standard value, discriminating the tension value, and displaying a warning and outputting an alarm.

In addition, the mooring line monitoring device of the present invention provides coordinates of an input point on the hull side of each mooring line of the plurality of mooring winches, coordinates of a mooring position of the mooring line on the quay side, and draft data of the hull. And a calculator for calculating the three-directional components of the mooring force acting on the hull, based on the above, so that the three-directional components of the mooring force calculated by the calculator are maintained within predetermined ranges, respectively. Mooring winch control means for automatically controlling the mooring winches based on the calculation results of the arithmetic unit is provided so that the tensions of mooring lines of the mooring winches are substantially equal to each other.

Further, the mooring line monitoring device of the present invention is provided with a hull position measuring system using an artificial satellite or the like on the hull, and inputs hull position information by the system to the mooring winch control means to position the hull in a fixed position. Characterized in that a position control system for maintaining the position is provided.

Further, the mooring line monitoring device of the present invention is characterized in that the mooring winch control means has a remote control system capable of remotely controlling the mooring winch.

In the above mooring line monitoring apparatus of the present invention, the tension of each mooring line from a plurality of mooring winches mounted on the ship to the mooring position on the quay side is detected by mooring line tension detecting means, and these tensions are detected. Since the detected values are collected and displayed on the tension display means, there is no need for the crew to cruise around the ship to check the status of each mooring winch, which can contribute to labor savings, and can also result in abnormal tension on any mooring line. When a change occurs, it is possible to respond promptly in response to the warning display and the warning output in the monitoring means, and it is possible to avoid the progress to a serious accident.

The arithmetic unit operates on the hull based on the coordinates of the hull-side input point for each mooring line of the plurality of mooring winches, the quay-side mooring position coordinates of the mooring line, and the draft data of the hull. The three-way components of the mooring force are calculated,
When the mooring winch control means for automatically controlling the three mooring winches to keep the tensions of the mooring lines of the plurality of mooring winches substantially equal to each other is provided while maintaining these three-directional components within a predetermined range, Even if the display on the means is overlooked or the warning from the monitoring means is missed, sufficient safety can be maintained by the automatic control.

Further, if a hull position measurement system using an artificial satellite or the like is provided on the ship, and the hull position information by the system is input to the mooring winch control means, the hull can be accurately positioned. In particular, when the hull position measurement system is provided at the bow and stern,
It becomes possible to maintain a substantially constant state.

Further, when the mooring winch control means is provided with a remote control system capable of remotely controlling the mooring winch, a plurality of mooring winches are simultaneously operated remotely on a bridge or the like to change the position and orientation of the hull in a steady state. Or the tension of the mooring line of each mooring winch can be appropriately maintained.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view showing a mooring state of a ship provided with a mooring line monitoring device according to an embodiment of the present invention; FIG. 1, FIG. 3 is a side view showing one of the mooring winches mounted on the ship of FIG. 1, FIG. 4 is a plan view showing a split flanged drum of the mooring winch of FIG. 3, 5 is a cross-sectional view taken along the line BB of FIG. 4, FIG. 6 is an explanatory view showing the clutch engaging / disengaging device of the mooring winch of FIG. 3, FIG. 7 is a view taken along the line CC of FIG. 6, and FIG. FIG. 9 is a block diagram showing a state in which tension display means and monitoring means are provided for a mooring winch, and FIG. 9 is a block diagram showing a comprehensive control system for a plurality of mooring winches.

As shown in FIGS. 1 and 2, a plurality of mooring winches 5 mounted on a quay 1 for mooring the marine vessel 4 on the quay 1 are provided.
A plurality of bits (quay side mooring position) 2
The mooring line 3 is stretched, and reference numeral 6 in FIG. 1 indicates an input point of the mooring line 3 on the ship.

The mooring line 3 is wound around a drum 5a of a mooring winch 5 installed on a deck 4a as shown in FIGS. 3 to 5, and the drum 5a is driven by a drive shaft 18 as shown in FIGS.
3 (off state of the clutch 14), and is fixed by the band-type brake 7 shown in FIG.

A load cell 11 is mounted on the tension bar 10 of the band type brake 7 (for example, a shear pin type load cell 11 is mounted on a pin connecting portion at the lower end of the tension bar 10), so that the tension of the mooring line is reduced. It can be converted from the detected value. That is, the drum 5a
This is because the radius r of the tension of the mooring line 3 wound around is fixed by using the drum 5a with the split flange 13 in FIG. Reference numeral 8 in FIG. 3 denotes a frame, 9 denotes a hydraulic cylinder for brake, 12 denotes a brake bracket, 15 in FIGS. 6 and 7 denotes a fulcrum pin for clutch, 16 denotes a lever for clutch, 17 denotes a bearing box, 19
Denotes a hydraulic cylinder for clutch.

The detection signals from the mooring line tension detecting means 21 (see FIG. 8) by the load cell 11 as described above are collected at one place and displayed on the tension display means 22, and furthermore, the detected tension value of each mooring line is detected. There is provided a monitoring means 23 for comparing the size of the data with a standard value, determining the caution, and outputting a warning and an alarm.

As shown in FIG. 9, the coordinates of the hull-side input point 6, the coordinates of the quay-side mooring position (the position of bit 2), and the hull draft meter 24 for each mooring line of the plurality of mooring winches 5. A computing unit 25 for calculating the three-directional components of the mooring force acting on the hull based on the draft data from
The computing unit is designed so that the three-directional components of the mooring force calculated by the computing unit 25 are maintained within predetermined ranges, and that the tensions of the mooring lines of the plurality of mooring winches 5 are substantially equal to each other. Multiple mooring winches 5 based on 25 calculation results
Mooring winch control means 26 is provided for automatically controlling the winch.

Further, in this embodiment, as shown in FIG. 1, a hull position measuring system 27 using an artificial satellite or the like is provided at each of the bow part and the stern part.
The hull position information from 27 is input to the mooring winch control means 26 as shown in FIG. 9 to provide a position control system for maintaining the hull at a fixed position. The mooring winch control means 26 includes a remote control system that can remotely control each mooring winch 5.

In the mooring line monitoring device of the present embodiment described above,
The tension of each mooring line 3 from a plurality of mooring winches 5 mounted on the ship to the mooring position (the position of the bit 2) on the quay side is detected by the mooring line tension detecting means 21, and the detected tension values are displayed as tension. Since it is collected and displayed on the means 22, it is not necessary for an occupant to cruise around the ship to check the condition of each mooring winch 5, which can contribute to labor saving, and an abnormal change in tension on any of the mooring lines 3 is eliminated. If this occurs, it is possible to respond promptly in accordance with the cautionary display and the alarm output of the monitoring means 23, and it is possible to avoid progress to a serious accident.

Further, each mooring line 3 of the plurality of mooring winches 5
The mooring force acting on the hull 4 by the calculator 25 based on the coordinates of the hull-side input point 6, the coordinates of the berth-side mooring position (bit 2 position) of the mooring line 3, and the draft data of the hull 4 Mooring winch control that automatically controls the mooring lines 3 of the mooring winches 5 to be substantially equal in tension while maintaining the three-directional components within a predetermined range. Since the means 26 is provided, even if the display on the tension display means 22 is overlooked or the warning from the monitoring means 23 is missed, the safety is sufficiently maintained by the automatic control.

Further, a hull position measurement system 27 using an artificial satellite or the like is provided on the ship, and the hull position information by the system is input to the mooring winch control means 26, so that the hull 4 can be accurately positioned. It is possible to maintain the hull in a fixed position, and particularly when the hull position measurement system 27 is provided at the bow and stern, the direction of the hull can be maintained at a substantially constant state.

Further, since the mooring winch control means 26 has a remote control system capable of remotely controlling the mooring winch 5,
In a bridge or the like, a plurality of mooring winches 5 can be remotely controlled at the same time to maintain the position and orientation of the hull 4 in a steady state, or to appropriately maintain the tension of the mooring ropes 3 of each mooring winch 5. become.

[0025]

As described above, according to the mooring line monitoring apparatus of the present invention, the following effects can be obtained. (1) The tension of each mooring line from a plurality of mooring winches mounted on the ship to the berth-side mooring position is detected by the mooring line tension detecting means, and the detected tension values are collected and displayed on the tension displaying means. Therefore, it is not necessary for the crew to cruise around the ship to check the status of each mooring winch, which can contribute to labor saving.In addition, when an abnormal tension change occurs in any mooring line, the monitoring means It is possible to respond promptly in response to the warning display and the alarm output, and to avoid advancing to a serious accident. (2) The coordinates of the hull-side input point for each mooring line of the plurality of mooring winches, the quay-side mooring position coordinates of the mooring line,
Based on the hull draft data, the arithmetic unit calculates the three-directional components of the mooring force acting on the hull, and these three-directional components are maintained within a predetermined range, and the mooring lines of the plurality of mooring winches are calculated. Mooring winch control means for automatically controlling the tensions of the two sets to be substantially equal to each other, even if the display on the display means is overlooked or the warning from the monitoring means is missed, Thus, safety is sufficiently maintained. (3) If a hull position measurement system using artificial satellites, etc. is provided on board the ship, and the hull position information by the system is input to the mooring winch control means, the hull will be accurately maintained at a fixed position. In particular, when the hull position measurement system is provided at the bow and stern, the direction of the hull can be maintained at a substantially constant state. (4) If the mooring winch control means is provided with a remote control system capable of remotely controlling the mooring winch, a plurality of mooring winches are simultaneously remotely controlled at a bridge or the like to maintain the position and orientation of the hull in a steady state. And the tension of the mooring line of each mooring winch can be appropriately maintained.

[Brief description of the drawings]

FIG. 1 is a plan view showing a mooring state of a ship provided with a mooring line monitoring device as one embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a side view showing one of mooring winches mounted on the ship of FIG. 1;

FIG. 4 is a plan view showing a split flanged drum of the mooring winch of FIG. 3;

FIG. 5 is a sectional view taken along the line BB of FIG. 4;

FIG. 6 is an explanatory view showing a clutch engaging / disengaging device of the mooring winch of FIG. 3;

FIG. 7 is a view as viewed in the direction of arrows CC in FIG. 6;

FIG. 8 is a block diagram showing a state in which tension display means and monitoring means are provided for a plurality of mooring winches.

FIG. 9 is a block diagram showing a comprehensive control system for a plurality of mooring winches.

[Explanation of symbols]

 1 Wharf 2 Bit (Wharf side mooring position) 3 Mooring line 4 Ship 4a Deck 5 Mooring winch 6 Mooring line input point 7 Band brake 8 Frame 9 Hydraulic cylinder for brake 10 Tension bar 11 Shear pin type load cell 12 Brake bracket 13 Split flange 14 Clutch 15 Clutch fulcrum pin 16 Clutch lever 17 Bearing box 18 Drive shaft 19 Clutch hydraulic cylinder 21 Mooring line tension detecting means 22 Tension display means 23 Monitoring means 24 Hull draft gauge 25 Computing unit 26 Mooring winch control means 27 Hull position Measurement system

Claims (4)

[Claims] 1. A plurality of mooring winches mounted on a ship, comprising: a plurality of mooring line tension detecting means for detecting a tension of mooring lines from each winch to a quayside mooring position; Tension display means is provided for collecting the detection signals from the detection means at one location and displaying the detected tension value of each mooring line. The magnitude of the detected tension value is compared with a standard value to determine the caution and to display a warning. A mooring line monitoring device, further comprising monitoring means for outputting an alarm. 2. The mooring line monitoring device according to claim 1, wherein coordinates of a hull-side input point for each mooring line of the plurality of mooring winches, coordinates of a quay-side mooring position of the mooring line, and A calculator is provided for calculating the three-directional components of the mooring force acting on the hull based on the draft data, and the three-directional components of the mooring force calculated by the calculator are each maintained within a predetermined range. So that the tensions of the mooring lines of the plurality of mooring winches are substantially equal to each other,
A mooring line monitoring device, further comprising mooring winch control means for automatically controlling the plurality of mooring winches based on a calculation result of the arithmetic unit. 3. The mooring line monitoring device according to claim 2, further comprising a hull position measuring system using an artificial satellite or the like on the hull, and inputting hull position information by the system to the mooring winch control means. A mooring line monitoring device, further comprising a position control system for maintaining the vehicle at a fixed position. 4. The mooring line monitoring device according to claim 2, wherein the mooring winch control means includes a remote control system capable of remotely controlling the mooring winch. apparatus.