JPS5852877B2 - Seigiyosouchi - Google Patents

Description

[Detailed Description of the Invention] This invention applies to the automatic control of swing operation interlock performed by a cutter dredger via a spud position detector, and the automatic control of the spud dead weight falling position and spud rising position performed via a spud position detector. The purpose of this system is to accurately locate spuds without relying on the operator's intuition, thereby increasing the efficiency of dredging operations.

Figure 1 is a plan view showing a schematic diagram of a cutter type dredger, and as shown in the figure, a spud winch normally has one winch motor.
In this case, two spud drums 2, 3 are switched by clutches 4, 4', and one of the two spud drums 5, 6 is used.
While one spud is driven into the seabed, the other one slips through the seabed to perform dredging work.

An example of the spud lifting position detector used in the embodiment of the present invention will be explained based on FIG. 2.

In this figure, the same reference numerals as in FIG. 1 indicate the same names or corresponding parts.

Reference numeral 17 denotes a spud hanging fitting, and a special measuring ring 18 has one end fixed to the spud hanging fitting 17, and a weight 19 is attached to the other end.
This weight 19 is suspended via a measuring wheel 20 provided at the top of the spud shaft.

The measuring wheel 20 rotates as the main body of the spud 6 moves up and down, and this rotating measuring wheel 20
A spud lifting position detector 21 consisting of a rotational oscillator or the like is attached to the rotating part of the spud, and an electrical signal of a voltage change corresponding to the spud lifting position is extracted from the output of the spud lifting position detector 21.

Figure 3 shows the automatic control of the swing operation interlock, the drop position of the spud's own weight, and the rise of the spud based on the signal obtained from the spud lifting position detector configured as above in the cutter type dredger. FIG. 2 is a block diagram showing the configuration of a device for automatically controlling a position.

To explain what a swing motion interlock is, in order to perform dredging work using a cutter head, two spuds 5 and 6 are installed at the left and right positions of the stern of the dredger.
Dredging work is performed by driving the spud winch drums 2 and 3 alternately into the seabed and swinging the cutter head to the left or right.As shown in Figure 1, the spud drum motor 1 that rotates the spud winch drums 2 and 3 is This motor 1 is connected to clutches 4, 4' or band brake 35.
．． I use a 35' to alternately throw spuds into the seabed.

Note that when driving the spuds 5 and 6 alternately into the seabed, strictly speaking, at a certain moment, there is only one motor, and if two spuds are pulled out at the same time, the ship will move and the dredging position will shift. Due to the risk, two spuds 5 will be used temporarily.
, 6, are simultaneously driven into the seabed.

At the moment when these two spuds 5 and 6 are being driven into the seabed at the same time, when the cutter head 16 swings, it will twist the hull 15, which is dangerous. It is necessary to separate the rotation of the swing winch drum 37 or 37' of the cutter head from the rotation of the swing motor 36 and stop it.

This is the swing motion interlock control.

In FIG. 3, numerals 25 and 26 are spud lifting position detectors installed on the port and starboard sides, respectively, and the detectors as shown in FIG. 2 are used.

In order to carry out the control according to the present invention, any device capable of detecting the spud position may be used instead of the device shown in FIG.

22 is a dredging depth setting device for setting the dredging depth; 23
is a spud hanging fixture position setting device, and this setting device 23 is used to obtain a voltage change control signal depending on whether the wire 14 fastened to the spud hanging fixture 17 is tied to 17a or 17b depending on the depth of dredging, etc. It is a vessel.

24 is a spud weight drop position setting device, and this setting device 24
The depth at which the spud is driven into the seabed by its own weight must be adjusted depending on the soil quality of the seabed.

Furthermore, the spud falling position during swing operation and the spud falling position during forward movement must be relatively shallower than the former in order to improve the efficiency of spud insertion and removal.

The spud dead weight drop position can be set using the spud dead weight drop position setting device 24 by disconnecting the spud winch motor 1 and winch drum 2 or 3 as shown in Fig. 1 or by adjusting the timing of the operation of the band brake 35° 35' based on the experience of the boat operator. This setting device outputs a voltage change setting signal.

The electrical signals of voltage changes based on the values set based on the experience of the ship's personnel in the dredging depth setting device 22, the spud lifting fitting position setting device 23, and the spud dead weight drop position setting device 24 explained above are transmitted to the port spud lifting position detector. 25 and the starboard spud lifting position detector 26, the difference detector 2
Output to 8.

The difference detector 28 examines whether there is a difference between the outputs of the calculators 27 and 29 based on the input from the dredging depth setter 22.
The differential detection signal is output to the swing operation interlock circuit 30.

This interlock circuit 30 is intercepted to output an interlock signal when two spuds 5 and 6 are driven into the seabed at the same time based on the difference detection signal, and this interlock signal is Accordingly, the rotation of the swing winch drum 37 or 37' shown in FIG. 1 is separated from the rotation of the swing motor 36, and automatic control is performed to stop the swing of the cutter head 16.

When only one of the two spuds 5 and 6 is driven into the seabed, the interlock circuit sends an interlock signal instead of an interlock signal based on the difference detection signal of the difference detector 28. A signal is output that allows normal swing operation.

Therefore, the swing of the cutter head 16 is not stopped.

Determination of the spud's own weight falling position and spud rising position is necessary to adjust the driving depth depending on the hardness and softness of the seabed soil into which the spud is to be driven. The block diagram of the automatic control device for determining these positions is shown in Figure 3. is shown.

In the same figure, the outputs of the two arithmetic units 27 and 29 described above are input to a spud operation control circuit 31 that controls the falling and rising positions of the spud's own weight, and this control signal causes the spud winch motor 1 of FIG. Separation of the winch drum 2 or 3 or band brake 35°35'
This system automatically controls the position detection of the spud's own weight as it falls and rises.

As explained above, the present invention uses a spud vertical movement signal obtained by a spud lifting position detector installed on the cutter dredger, a dredger depth setting device signal, and a spud lifting fitting position setting in a cutter type dredger. control of the swing operation when driving 12 spans by a swing operation interlock signal calculated from the device signal and the spud dead weight drop position setting device signal via a calculation unit and a difference detector; and the calculation unit. It is characterized by controlling the rising position of the spud and the setting of the spud's own weight falling point using the signal calculated through the The relative position of the two spuds can be accurately determined.

In addition, it is possible to set the position where the spud falls due to its own weight when driving the spud in relation to the quality of the seabed soil, and the spud can be smoothly stopped at the raised position.

Therefore, the time lost during dredging work is reduced, the overall efficiency is improved, the operation does not rely on the operator's intuition, and anyone can obtain the same results.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a schematic diagram of a cutter type dredger, FIG. 2 is an explanatory diagram of a spud hanging position detector according to an embodiment of the present invention,
FIG. 3 is a block diagram showing the configuration of the automatic control device of the present invention. 1...Spud winch motor, 2,3...
...Spud drum, 4,4'...Clutch, 5,6...Spud, 7...Driver's cab, 8...Reflector, 9゜9'... Rotating oscillator, 10,10'... Light emitter, 11゜11
'... Light receiver, 12, 12'... Spud keeper 14, 14'... Winch wire for spud, 15... Dredger, 16...・
・Cutter head, 17... Spud hanging fitting, 1
8...Measuring wire, 19...
Weight, 20... Measuring wheel, 21.
... Spud lifting position detector, 22 ... Dredging depth setting device, 23 ... Spud hanging bracket position setting device, 24 ... Spud dead weight falling position setting device, 25
・・・・・・Port side spud lifting position detector, 26...
...Starboard spud lifting position detector, 27, 29.
... Arithmetic unit, 28... Difference detector, 30.
...Interlock circuit for swing operation, 31.
...Spud operation control circuit, spud rising position detector, 35, 35'...Band brake, 36
... Swing motor of cutter head 16, 3
7, 37'... Swing winch drum for cutter head 16.

Claims (1)

[Claims] 1. In a cutter dredger, first and second spud lifting position detectors detecting the two spud lifting positions;
A dredging depth setting device for setting the dredging depth, a spud hanging fitting position setting device for setting the spud hanging fitting position determined based on the depth to be dredged, and a dredging depth setting device for setting the spud hanging fitting position determined based on the dredging depth, and a dredging depth setting device for setting the spud hanging fitting position determined based on the dredging depth. output signals from a spud dead weight drop position setting device for setting a falling position, the first spud lifting position detector, the dredging depth setting device, the spud position setting device and the spud dead weight falling position setting device; a first computing unit that performs calculations based on the operating state of one spud and generates an output signal corresponding to the operating state of one of the spuds, the second spud lifting upper detector, the dredging depth setting device, the spud position setting device, and the spud own weight. a second computing unit that performs calculations based on the output signal from the drop position setting device and generates an output signal corresponding to the operating state of the other spud; and a difference detector for detecting the difference between the output signals from the two arithmetic units; a swing operation interlock circuit for interlocking the swing operation of the cutter head based on the output signal from the difference detector; 2. A control device for a dredger, comprising: a spud operation control circuit that controls the drop point of the spud under its own weight and the stop of the spud in its raised position based on the output signal of the arithmetic unit No. 2.