JPS64447Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a control device for a hydraulic winch for swinging the hull of a dredger or the like from side to side.

Figures 1 to 3 show a dredger that requires swinging of the hull. Figure 1 is its plan view, Figure 2 is its side view, and Figure 3 is its front view.
1 can swing left and right around a spud 12 driven into the seabed S.

That is, the rudder 13 protruding from the hull 11
A cutter 14 is attached to the tip of the cutter 14, and the cutter 14 is moved while swinging the hull 11 from side to side.
For this purpose, swing wires 16 and 16' having anchors 15 and 15' are connected to a winch 17 for left swing and a winch for right swing disposed on both sides of the hull 11. The hull 11 swings from side to side by being wound in and out by the winch 17' and hydraulic motors 18, 18' each with a winch.

In addition, in FIGS. 1 to 3, the reference numeral 19 indicates a maneuvering room, and 20 and 20' indicate a pair of left and right pulleys,
CL indicates the hull centerline and WL indicates the sea level.

By the way, as a control means for the winches 17, 17' operated by the hydraulic motors 18, 18', a device as shown in FIG. 4 has conventionally been used.
Each winch 17, 17' is provided with a hydraulic control valve 32, 32' as a dedicated three-way switching valve, and each hydraulic control valve 32, 32' and a pressure regulating valve 33, Pressure oil is supplied to the hydraulic motors 18, 18' via 33'.

At the center position of the hydraulic control valves 32, 32', pipes (pipes) 52, 5 that can communicate the discharge side and suction side of each hydraulic motor 18, 18'
2' is formed, and pressure regulating valves 33, 33' inserted into these pipes 52, 52' are connected to the hydraulic motor 1.
In order to adjust the pressure from the discharge side of 8, 18',
That is, the hydraulic motors 18, 18' are connected to the winch 1.
The pressure regulating valves 33, 3 are arranged so that they can be driven by the valves 7, 17' and also perform a braking action.
3' is adjusted.

Such a conventional swing type winch 17,1
In the control means 7', as shown in FIG. 3, when the cutter 14 swings in the right direction D while rotating clockwise, the right swing winch 17' winds in, and the left swing winch 17 moves out. Let's do it.

At this time, the rolling of the cutter 14 (the cutter 14
In order to prevent the left swing winch 17 from rolling and moving on the seabed S to be excavated, it is necessary to operate the left swing winch 17 while applying braking.

Therefore, when swinging the hull,
The problem is that the operator must adjust the tension of the left and right wires 16, 16' to an appropriate value, and must operate the two hydraulic control valves 32, 32' at the same time, which requires skill. There is a point.

The present invention is an attempt to solve these problems, and has developed a hydraulic winch for use on dredgers that swings left and right, which enables reliable control of the hydraulic winch for swinging the hull through simple operations. The purpose is to provide a control device.

Therefore, the control device for a hydraulic winch for a left-right swing type dredger of the present invention is used in a left-right swing type dredger that swings the ship body using a pair of control swing wires. A pair of winches for swinging the hull, a pair of hydraulic motors driving the winches for swinging the hull, and a hydraulic motor that branches off from the hydraulic source through a directional control valve and reaches the hydraulic motor, respectively. A pair of hydraulic circuits each capable of supplying pressure oil and returning hydraulic oil from the same hydraulic motor, and a pair of branched hydraulic circuits respectively provided to selectively supply pressure oil to the pair of hydraulic motors. a pair of on-off valves connected to the pair of hydraulic motors; a pressure regulating means inserted in each of the oil passages on the discharge side in the feed-out direction of each winch connected to the pair of hydraulic motors; the pair of on-off valves are operated in opposite directions to each other in order to energize one of the winches for retracting operation and at the same time enable the other winch to retract, and to adjust the pressure in the oil passage on the discharge side of the hydraulic motor of the other winch. The present invention is characterized in that it is provided with an interlock control limit switch that operates to bias the means into an operating state.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Fig. 5 is a hydraulic circuit diagram showing a control device for a hydraulic winch for a left-right swing type dredger as a first embodiment of the present invention.

As shown in FIG. 5, a pair of winches 17 and 17' for left swing and right swing winches 17 and 17', respectively, are provided on both sides of the hull.
a pair of hydraulic motors 18, each driving a motor 17';
18', and a hydraulic pump 4 as a hydraulic power source.
Hydraulic control valves (directional switching valves) 42, 4 that supply pressure oil from 1 to each hydraulic motor 18, 18'
A pair of hydraulic supply systems (hydraulic circuits) A,
A′ is provided.

Between both hydraulic supply systems A and A', electromagnetic on-off valves 46 and 4 are provided for communication and cutoff.
6' is provided.

In addition, numerals 43 and 43' in FIG. 5 are pressure regulating valves constituting the pressure regulating means M and M' inserted in the winch delivery direction discharge side oil passages 52 and 52', respectively, and 44 and 44' are remote control valves. Pressure control valve, 4
Reference numerals 5 and 45' indicate electromagnetic valves constituting the pressure regulating means M and M', and 47 indicates a limit switch for interlock control. The limit switch 47 is a pressure regulating means that is engaged to operate in the left and right directions when the right port and left port of the interlocking hydraulic control valve (direction switching valve) 42' are closed, and includes electromagnetic valves 45 and 45'. M, M' and on-off valves 46, 46' are electrically connected to operate in the following combinations.

That is, this electrical connection is established by pressing the independent operation push button in the connection circuit.
5' and on-off valves 46, 46' are closed, on-off valves 46',
46 is opened, the linkage between each of these valves and the limit switch 47 is reset to OFF, and all valves 45, 45', 45',
46, 46' are closed, and the linkage between these valves and limit switch 47 is reset to ON.

The hydraulic control valve 4 also enters interlocking operation.
When the left port 2' is turned on, the limit switch 47 that engages with it operates, and a second control signal is sent to the solenoid valve 45', and a first control signal is sent to the on-off valve 46, and these valves are 45', 4
6 is biased open, and then the hydraulic control valve 42' is switched to the right port, the limit switch 47 operates to close the solenoid valve 45' and the on-off valve 4.
6, these valves 45' and 46 are returned to closed, and a second control signal is sent to the solenoid valve 45, and the on-off valve 46'
A first control signal is sent to these valves 45, 4.
6' is biased open.

Of the two hydraulic control valves 42, 42',
One hydraulic control valve 42 is used exclusively for the starboard winch 17, and the other hydraulic control valve 42' is also used exclusively for the port winch 17'.
The hydraulic circuit is configured so that the two winches 17, 17' can be operated simultaneously with just this.

Since the independent operation of each hydraulic supply system A, A' is the same as in the conventional case, here, one hydraulic control valve 42' is used to operate two winches 17, 1.
I will explain the hydraulic circuit when operating 7'.

First, before operating the hydraulic control valve 42',
It is necessary to select whether to operate the winches 17, 17' independently or in conjunction with each other.

When operating independently, pressing the push button not only closes one on-off valve 46, 46' but also closes the other on-off valve 46', 46'.
is open, and even if the limit switch 47 is moved by operating the hydraulic control valve 42', the on-off valves 46, 46' keep the circuit A closed, and the on-off valve 4
6', 46 maintain an open circuit. Also, the solenoid valve 45,
45' also maintains a closed circuit.

When operating the hydraulic supply systems A and A' on both sides in conjunction, when the interlocking push button is pressed, each electromagnetic valve 45, 45' and the on-off valve 46,
46' is closed, but the limit switch 47 with the hydraulic control valve 42' is in a state where it can be switched in response to a signal.

Note that in this state, the hydraulic control valve 42
Since it is a dedicated control valve for the left swing winch 17, it is held at the neutral position.

In this way, the hydraulic control valve 42' can be used for interlocking operation, and in this state, the control valve 42' is connected to the right swing winch 1.
7' is operated to extend the valve, the solenoid valve 45' and the on-off valve 46 are activated by the action of the limit switch 47.
is switched to open, and the solenoid valve 45 and the on-off valve 46'
remains closed.

In this state, the hydraulic oil flows through circuit A in Fig. 5 as indicated by the solid line arrow above, and the left swing winch 17 performs a winding operation, and the right swing winch 17 moves as shown by the dashed line in the figure. winch 1
7' is feeding operation (feeding out state with braking)
becomes.

When the hydraulic control valve 42' is operated in the opposite direction, the solenoid valve 45 and the on-off valve 46' are opened due to the action of the limit switch 47, and the on-off valve 42' is opened.
5' and the switching valve 46 are closed.

In this state, the right swing winch 17' is in a retracting operation, and the left swing winch 17 is in a drawing-out operation (a drawing-out state accompanied by braking).

In the first embodiment of the present invention described above, two hydraulic controls are provided for each hydraulic motor 18, 18' of the two winches 17, 17' for left and right swing of the hull 11, which are arranged on both sides of the hull. Valves 42, 42' are provided, one of these valves 42' being used as a hydraulic control valve for interlock operation.

Further, in the second embodiment, the valve 42 of the first embodiment,
42', a hydraulic control valve (direction switching valve) 51 for interlock operation is provided as shown in FIG. 6, and in FIG. 17 is performing a retracting operation, and the right swing winch 17' on the port side is performing an unwinding operation.

As detailed above, according to the control device for the left-right swing type hydraulic winch for dredgers of the present invention, by simply operating the directional control valve, the
It is possible to control the on-off valve and the pressure adjustment means,
The retracting side of the pair of swing wires performs normal retraction, and the retracting side of the pair of swing wires adjusts the pressure in the hydraulic circuit on the discharge side of each winch connected to the hydraulic motor on the retracting side. , the swing wire can be paid out while applying braking, thereby eliminating problems such as the cutter rolling without performing the digging action.
It has the advantage of being able to swing the dredger's hull efficiently.

[Brief explanation of the drawing]

Figures 1 to 3 show a dredger with a left-right swing type. Figure 1 is its plan view, Figure 2 is its side view, Figure 3 is its front view, and Figure 4 is the conventional left-right swing type dredger. 5 is a hydraulic circuit diagram showing a control device of a hydraulic winch for a swing type dredger, and FIG.
The figures are hydraulic circuit diagrams showing control devices for a left-right swing type hydraulic winch for a dredger as a first embodiment and a second embodiment of the present invention, respectively. 11... Hull, 12... Spud, 13... Rudder, 14... Cutter, 15, 15'... Anchor, 16, 16'... Swing wire, 17,
17'... Winch, 18, 18'... Hydraulic motor, 19... Navigation room, 20, 20'... Pulley, 4
1...Hydraulic pump as a hydraulic source, 42, 42'
...Hydraulic control valve (directional switching valve), 43,
43'...Pressure regulating valve constituting pressure regulating means,
44, 44'...Remote pressure control valve, 45, 4
5'... Solenoid valve constituting pressure adjustment means, 46,
46'...Solenoid open/close valve, 47...Limit switch for interlock control, 51...Hydraulic control valve for interlock operation (direction switching valve), 52, 52'...Winch feed-out direction discharge side oil passage, A, A' ...Hydraulic supply system as a hydraulic circuit, CL...Hull center line, D
...Swing direction, M, M'...Pressure adjustment means,
S...sea floor, WL...sea surface.

Claims (1)

[Scope of utility model registration request] In a left-right swing type dredger that swings the hull using a pair of left and right swing wires, a pair of hull swing winches arranged on both sides of the hull and winding the swing wire, and an identical pair of hull swing winches are provided. A pair of hydraulic motors are respectively driven, and a pair of hydraulic motors are branched from a hydraulic source through a directional control valve, each reaches the hydraulic motor, supplies hydraulic oil to the hydraulic motor, and returns hydraulic oil from the hydraulic motor. a hydraulic circuit, a pair of on-off valves that are respectively provided in the pair of branched hydraulic circuits and selectively supply pressurized oil to the pair of hydraulic motors, and a discharge side in the payout direction of each winch connected to the pair of hydraulic motors. In response to the switching of the pressure regulating means inserted in each of the oil passages and the directional control valve, one of the pair of hull swinging winches is energized for winding operation, and at the same time, the other is enabled to extend. An interlock control limit switch is provided to operate the pair of opening/closing valves in opposite directions and to bias the pressure regulating means in the discharge side oil passage of the hydraulic motor of the other winch to the operating state. This is a control device for hydraulic winches for dredgers that swing from side to side.