JPH052689Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a spud device for anchoring a dredger or the like from the seabed, and is particularly an improved device for raising and lowering a spud installed on a ship's hull so that it can be raised and lowered. This relates to a spud device for a dredger.

[Prior Art] Generally, as shown in Figs. 5 and 6, a dredger has a vertically movable rudder c extending to the seabed b on the bow side of a hull a, and dredges earth and sand at the tip of the rudder c. It has a cutter d for moving the cutter d, and a spud device e on the stern side for moving the cutter d forward or turning.

The spud device e consists of a spud f for driving a pile into the seabed b, a carriage q that supports the spud f so as to be movable up and down, and a carriage well h that accommodates the carriage q so as to be movable in the longitudinal direction.

During dredging work, as shown in Figure 6,
is driven into the seabed b, and its spat f
As shown in FIG. The vessel is moved forward, and the seabed b in front of it is dredged using cutters d.

Moreover, when the dredging for the length of movement of the carriage q is completed, the spud f is pulled out from the seabed b, and the spud f is again driven into the seabed b in front of it, and the cutter d is rotated forward as described above to start dredging. It's something that will happen.

Conventionally, in order to raise and lower this spud f, a sling wire (not shown) is wound around the spud f.
It is lifted up and down using wires.

[Problems to be solved by the invention] However, in order to lift the spud using wires, it is necessary to install a pulley at a high position and a tower with sufficient strength, resulting in a large installation area and excessive weight, making it difficult to move the spud forward. There is a problem that automation of dredgers cannot be achieved.

The present invention was made in consideration of the above facts,
To provide a spud device for a dredger capable of raising and lowering a spud without lifting the spud with a wire or the like.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a spud device for a dredger in which a spud that can be raised and lowered is provided on the hull, and a vertical fixed cylinder shaft is attached to the hull via a support member. The spud main body is formed by standing upright and consisting of an inner cylinder and an outer cylinder, and the inner cylinder of the spud main body is fitted into the fixed cylinder structure to form a hydraulic chamber above it. A slit is formed through which the support member is inserted and the spud body is raised and lowered, and a hydraulic oil supply and discharge system is provided from the support member to the top surface of the fixed cylinder shaft for supplying and discharging hydraulic oil to the hydraulic chamber. .

[Function] According to the above configuration, a slit is formed in the outer cylinder, the inner cylinder that forms the hydraulic chamber is supported by a support member through the slit, and a hydraulic oil supply and discharge system is provided in the support member, and the hydraulic oil supply and discharge system is operated by the supply and discharge system. The spud can be raised and lowered by supplying and draining oil. At this time, even if the long spud is raised and lowered by hydraulic pressure, the hydraulic oil supply and discharge system only needs to be fixedly installed on the hull, making it easy to supply and discharge the hydraulic oil.

[Embodiment] A preferred embodiment of the spud device for a dredger according to the present invention will be described below with reference to the accompanying drawings.

First, the overall structure of the dredger is as explained in the conventional example shown in FIGS. 5 and 6.

Now, in FIGS. 1 and 2, a fixed cylinder shaft 3 is vertically installed on a carriage 1 of a boat body via a support member 2. As shown in FIGS. A spud body 4 is provided which fits into the fixed cylinder shaft 3 and moves up and down.

The spud main body 4 consists of an inner cylinder 6 that fits onto the fixed cylinder shaft 3 and forms a hydraulic chamber 5 above it, and an outer cylinder 7 that surrounds the inner cylinder 6.
A slit 8 is formed through which the support member 2 is inserted over the range of elevation of the spud body 4. Further, the inner tube 6 and the outer tube 7 are connected with a support member 9 as appropriate.

The support member 2 is provided with a guide tube 10 that surrounds the spud body 4, and a guide roller 11 is provided on the inner surface of the guide tube 10 to guide the raising and lowering of the outer tube 7 of the spud body 4.

A hydraulic oil supply and discharge system 12 for supplying and discharging hydraulic oil into the hydraulic chamber 5 is connected to the fixed cylinder shaft 3, and the hydraulic oil is supplied from the hydraulic oil supply and discharge system 12 into the hydraulic chamber 5, and the spud body 4 is raised as shown by the two-dot chain line in FIG. 1, the hydraulic oil in the hydraulic chamber 5 is returned to the hydraulic oil supply and discharge system 12, and the spud body 4 is lowered.

The spud main body 4 is provided with an upper limit stopper 13 for regulating the upper limit position of the spud main body 4 and a lower limit stopper 14 for regulating the lower limit position of the spud main body 4 when the spud main body 4 is raised and lowered. Stopper 13 and lower limit stopper 1
Upper and lower limit switches 15 and 16 are provided for detecting 4 and 4, respectively.

Next, the hydraulic oil supply and discharge system 12 will be explained with reference to FIG.

First, as shown in FIGS. 1 and 2, the fixed cylinder shaft 3 is provided with a supply/discharge passage 18 communicating with the hydraulic chamber 5, and the supply/discharge passage 18 is connected to a hydraulic pipe 19 attached to the support member 2. Connected.

As shown in FIG. 3, the hydraulic piping 19 is connected to an oil supply line 21 connected to a hydraulic pump 20 and an oil drain line 22 that returns oil from the hydraulic piping 19.

A filter 23 is connected to the suction side of the hydraulic pump 20, and the hydraulic oil in the tank 24 is sucked in from the filter 23, and is transferred to the hydraulic piping via a check valve 25 connected to the oil supply line 21 and a solenoid valve 26 for oil supply. 1
9, the oil is supplied to the hydraulic chamber 5 through the supply and discharge passage 18, and the oil is returned to the tank 28 through the oil discharge line 22 through the oil discharge solenoid valve 27 via the hydraulic piping 19. There is.

In addition, the oil supply line 21 is configured to return the hydraulic oil in the oil supply line 21 to the tank 29 when it is not energized, and to stop the return of the hydraulic oil to the tank 29 when it is energized, and to supply hydraulic oil from the oil supply line 21 to the hydraulic chamber 5. A solenoid valve 30 for starting refueling is connected. Oil supply line 2
1 includes a safety valve 3 such as a relief valve that returns the hydraulic oil in the oil supply line 21 to the tank 31 so that the pressure of the hydraulic oil supplied to the hydraulic chamber 5 does not rise above a set value.
2 is connected.

In order to raise the spud body 4 in the hydraulic oil supply/drainage system 12 shown in FIG. When the starting solenoid valve 30 is energized and closed, the hydraulic oil from the hydraulic pump 20 flows into the hydraulic piping 19 through the check valve 25 of the oil supply line 21 and the oil supply solenoid valve 26, and the hydraulic oil from the fixed cylinder shaft 3 is closed. It flows into the hydraulic chamber 5 through the exhaust passage 18, and as a result, the spud body 4 rises as shown by the dotted line in the figure. When the upper limit stopper 13 provided on the spud body 4 hits the upper limit switch 15,
The upper limit switch 15 de-energizes the refueling solenoid valve 26 and closes it, holding the spud body 4 in the raised position.

Next, in order to lower the spud main body 4, the hydraulic oil in the hydraulic chamber 5 returns to the tank 28 from the hydraulic piping 19 through the oil drain line 22 by energizing and opening the oil draining electromagnetic valve 27. will fall under its own weight. In this case, the oil drain line 22
The descent speed can be adjusted by increasing the caliber. When the lower limit stopper 14 of the spud body 4 hits the lower limit switch 16, the lower limit switch 16 de-energizes the oil draining solenoid valve 27 and closes it, and as a result, the spud body 4 is stopped at its lowered position.

FIG. 4 is an electrical circuit diagram of the hydraulic oil supply and discharge system 12 of FIG. 3.

In FIG. 4, the power source 33 is connected to the lift pushbutton 3.
The first relay coil 35 energized by the lowering push button 36 is connected, and the second relay coil 37 energized by the lowering push button 36 is connected.

The refueling solenoid valve 26 and the refueling start solenoid valve 30 are connected to a first relay contact 38 operated by a first relay coil 35, and the oil draining solenoid valve 27 is connected to a second relay contact 38 operated by a second relay coil 37. Connected to relay contact 39. Further, a third relay coil 40 is connected to the lower limit switch 16, and a fourth relay coil 41 is connected to the upper limit switch 15.

The first relay coil 35 has a first relay contact 38
, a self-holding first relay contact 38a connected in parallel to the ascending push button 34, and the descending push button 3.
6 and the first relay b contact 38b connected in series. The second relay coil 37 includes a second relay contact 39, a second self-holding relay contact 39a connected in parallel to the lowering push button 36, and a second relay b contact 3 connected in series to the lowering push button 34.
Operate 9b.

Further, the third relay coil 40 is connected to the lowering push button 3.
The third relay contact (b contact) connected in series to 6
42, and the fourth relay coil 41 operates a fourth relay contact (b contact) 43 connected in series to the upward push button 34.

In the circuit shown in FIG. 4, in order to raise the spud body 4, the first relay coil 35 is energized by pressing the raising pushbutton 34, and the first relay contact 38 is energized by the excitation of the first relay coil 35.
is closed, the refueling solenoid valve 26 and the refueling start solenoid valve 3
0 is operated, hydraulic oil is supplied into the hydraulic chamber 5 by the hydraulic pump 20, and the spud body 4 is raised, as explained in FIG. When the rising pushbutton 34 is pressed and the first relay coil 35 is energized, the self-holding first relay contact 38a closes, so even if the pushbutton 34 is released and opened, the first relay coil 35 remains closed.
is energized, and the spud main body 4 rises to the upper limit position. When the spud main body 4 rises to the upper limit position, the upper limit switch 15 operates and closes, and the fourth relay coil 41 is energized, and as a result, the fourth relay contact 43 operates and opens, and the first self-holding relay is closed. The energization from the contact 38a to the first relay coil 35 is stopped, the first relay contact 38 is opened, and the refueling solenoid valve 26 and the refueling start solenoid valve 30 are closed.
energization is stopped, and oil supply to the hydraulic chamber 5 is stopped.

Next, when the lowering push button 36 is pressed, the second relay coil 37 is energized, the second relay coil 37 closes the second relay contact 39, and the oil draining solenoid valve 27 is turned on.
When the valve 27 is energized and the valve 27 is opened, the hydraulic oil in the hydraulic chamber 5 is drained through the oil drain line 22 as explained in FIG. 3, and the spud body 4 is lowered. When the lowering push button 36 is pressed and the second relay coil 37 is energized, the self-holding second relay contact 39a closes, so even if the push button 36 is released and opened, the second relay coil 37 is energized and the spud body 4
descends to the lower limit position. When the spud main body 4 descends to the lower limit position, the lower limit switch 16 operates and closes, and the third relay coil 40 is energized, and as a result, the third relay contact 42 operates and opens, and the second self-holding Relay contact 39a
energization to the second relay coil 37 is stopped, and the second
The relay contact 39 opens, the oil draining electromagnetic valve 27 closes, oil draining is stopped, and the lowering of the spud body 4 is stopped.

By pressing the rising push button 34 and the descending push button 36 in this way, the hydraulic chamber 5 of the spud body 4 is opened.
The spud main body 4 can be raised and lowered by supplying and discharging hydraulic oil therein.

In addition, the push button 34 for raising and the push button 36 for lowering
Instead, it can be turned on/off by a command from a computer, etc.
The OFF signal can also be used to raise and lower the spud body 4 under computer control.

[Effects of the Invention] As is clear from what has been described in detail above, the present invention provides the following excellent effects.

(1) The spud body is fitted onto a vertical fixed cylinder shaft, and a hydraulic chamber is formed above it. Hydraulic oil is supplied to and discharged from the hydraulic chamber, and the spud body is raised and lowered by hydraulic pressure, making it possible to raise and lower the spud. Automation can be measured.

(2) Since hydraulic pressure moves the spud body up and down, there is no need for conventional towers, and the installation area can be reduced.

(3) By forming a slit in the outer cylinder, supporting the inner cylinder that forms the hydraulic chamber through the slit with a support member, and providing a hydraulic oil supply and discharge system to the support member, the long spud can be raised and lowered. However, the supply and discharge system can be fixed and the hydraulic piping can be simplified.

[Brief explanation of the drawing]

Figure 1 is a front view showing one embodiment of the present invention;
The figure is a sectional view of Figure 1, Figure 3 is a hydraulic circuit diagram showing the hydraulic oil supply and discharge system in the present invention, Figure 4 is an electric circuit diagram of Figure 3, Figure 5 is a plan view of the dredger, and Figure 6 is a diagram of the electrical circuit diagram of Figure 3. The figure is a front view of FIG. 5. In the figure, 1 is the carrier of the hull, 2 is the support member, 3 is the fixed cylinder shaft, 4 is the spud body, 5
1 is a hydraulic chamber, and 12 is a hydraulic oil supply and discharge system.

Claims (1)

[Scope of utility model registration request] In a dredger spud device in which a spud that can be raised and lowered is provided on the ship's hull, a vertical fixed cylinder shaft is provided on the ship's hull through a support member, and a spud main body consisting of an inner cylinder and an outer cylinder is formed. The inner cylinder of the main body is fitted into the fixed cylinder structure to form a hydraulic chamber above it, and
A slit is formed in the outer cylinder through which the support member is inserted and the spud body is raised and lowered, and a hydraulic oil supply and discharge system is provided from the support member to the top surface of the fixed cylinder shaft for supplying and discharging hydraulic oil to the hydraulic chamber. A spud device for a dredger that is characterized by: