JP2786147B2 - Dredging and draining method using a dredging and draining work boat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dredging and discharging method using a dredging and discharging work boat. More specifically, in case of heavy rain, dredging drainage removes sludge that accumulates on the bottom of the river to the main stream side in order to prevent running water from flowing smoothly into the river and invading the rice field and causing flooding. The present invention relates to a dredging and draining method using a mud work boat.

[0002]

2. Description of the Related Art Dredgers are equipped with cranes, winches, and buckets for pumping sludge on riverbeds. In such a conventional dredger, the sludge pumped by the bucket is transported to a landfill truck or its own hull to a disposal site. Most of the sludge thus discarded is moisture. Such a disposal method with limited transport is inefficient.

[0003] A method is conceivable in which the extracted sludge is directly discarded from the bucket to the main stream side. However, it takes a lot of time to reciprocate the bucket, and similarly, there is a demand for an inefficient and simpler sludge dredging method for sludge dredging. Have been.

[0004]

SUMMARY OF THE INVENTION The present invention has been made based on such a technical background, and achieves the following objects.

[0005] It is an object of the present invention to provide a dredging and draining method using a dredging and draining work boat capable of efficiently dredging sludge by utilizing the functions of a ship in general.

It is another object of the present invention to provide a dredging and draining method using a dredging and draining work boat capable of removing a large amount of sludge near an embankment in a short time.

It is still another object of the present invention to provide a method of dredging and draining by a dredging and draining workboat which controls the direction of the water flow to make the sludge more efficient in the method of removing sludge by turbidity in the water flow. It is in.

It is still another object of the present invention to provide a dredging / draining method using a dredging / draining work boat for controlling the attitude of a hull, controlling the direction of a water flow for eliminating sludge, and improving the efficiency of drainage. is there.

It is still another object of the present invention to provide a dredging and draining method using a dredging and draining work boat, which utilizes a rudder provided on the hull itself to control the attitude and the direction of water flow of the hull to increase work efficiency. is there.

[0010]

Means for Solving the Problems To solve the above-mentioned problems, the following means are adopted.

The dredging and draining method by the dredging and draining work boat according to the first aspect of the present invention is directed to a dredging and draining method using an anchor which can be raised and lowered from the hull with respect to the water bottom, a propulsion device provided behind the hull to propel the hull forward and backward. A dredging and draining method using a dredging and draining work boat using a dredging and draining work boat comprising a rudder receiving a water flow created by the propulsion device, wherein a front portion or a rear portion of the hull is supported against a water bottom by the anchor. Controlling the movement of the rear part or the front part of the hull by applying the rudder to a water flow created by rotating the propulsion device, and stirring the sludge layer deposited on the water bottom by the water flow to form water and sludge. Forms a turbid liquid which becomes turbid, and the turbid liquid is caused to flow out to the mainstream side by the propulsion device.

A second aspect of the present invention is a dredging and draining method using a dredging and draining work boat according to the first aspect, wherein the rudder is provided behind the propulsion device.

According to a third aspect of the present invention, in the second aspect, the anchor is a rigid anchor having rigidity, and the forward movement of the hull is prevented by the rigid anchor. It is characterized by:

[0014] A dredging and draining method using a dredging and draining work vessel according to a fourth aspect of the present invention is characterized in that, in the third aspect, the propulsion device is constituted by a rotating blade, and the stirring is efficiently performed by the rotating blade.

According to a fifth aspect of the present invention, there is provided a method for dredging and discharging by a dredging and draining work boat according to the first, second, third or fourth aspect, wherein the direction of the water flow is controlled by controlling the direction of the rudder. And

According to a sixth aspect of the present invention, there is provided the dredging and draining method using the dredging and draining work boat according to the first, second, third, or fourth aspect, wherein a mud scraping member for scraping the sludge is attached to a leading portion of the rigid anchor. The sludge is softened by the mud member by moving a rigid anchor, and the sludge is stirred by the water flow.

According to a seventh aspect of the present invention, there is provided a method for dredging and draining by a dredging and draining work boat, comprising: a hull, an anchor capable of ascending and descending from the hull to a water bottom, and a propulsion provided behind the hull to propel the hull forward and backward. And a rudder for receiving a water flow generated by the propulsion device, a dredging and draining method using a dredging and draining work boat using a dredging and draining work boat, wherein the anchor is a rigid rigid anchor, and the dredging and draining work is performed. Using a plurality of ships arranged in series in the front-rear direction, the hulls of the plurality of ships are supported against the water bottom by the anchors, and the respective rudders act on the water flow created by rotating and driving the respective propulsion devices. The motion of the two hulls is controlled, and the sludge layer deposited on the bottom of the water is agitated by the water flow to form a turbid liquid in which water and sludge are turbid, and the turbid liquid flows toward the main stream by the respective propulsion devices. Make.

The dredging and draining method using the dredging and draining work boat according to the present invention is characterized in that the front and rear parts of the hull are swung by the propulsion device and the rudder to change the direction of the hull at the same position, while convection water and sludge generated by the propulsion device. Is stirred and turbid, and put on a propulsion flow created by a propulsion device to join the main flow. As described above, the mud is discharged by a function provided in the ship itself. Change the direction of the water flow to control the discharge direction. There is no need to transport rejects. Dredging can be performed efficiently and in large quantities.

[0019]

Next, an embodiment of the present invention will be described. 1 and 2 are a plan view and a front view showing a dredger used in the embodiment of the dredging and draining method by the dredging and draining work boat of the present invention. Dredgers are common vessels. That is, the dredger comprises a hull 1, a propulsion device 2 provided at a rear part of the hull 1, and a rudder 3. As the propulsion device 2,
Rotors are appropriate. The rudder 3 is behind or behind the propulsion device 2.

The dredge has an anchor 4. The anchor 4 is a rigid anchor having rigidity and extends forward. The base of the rigid anchor 4 is rotatably supported by a rotating shaft 4a. The rigid anchor 4 has a rotating shaft 4a.
And can be supported by the hull 1 and can be raised and lowered with respect to the hull. The rigid anchor 4 has an arm 4b that rotates integrally via a rotation shaft 4a. A mud plate 5 is attached to the head of the rigid anchor 4.

The mud plate 5 is used in a posture in which the lower end is inclined downward and rearward from the upper end. A winch drum 6A is mounted on the dredge. Winch drum 6
One end of the wire rope 7 wound by A is fixed to the winch stand rigid portion. Winch drum 6
By the forward and reverse rotation drive of A, the rigid anchor 4 can be raised and lowered, and the mud plate 5 at the leading end of the rigid anchor 4 can be moved up and down.

As shown in FIG. 1, the mud plate 5 includes a horizontal plate 8 and vertical plates 9 of both wings. No bottom plate is provided. The rigid anchor 4 is formed by support arms 11 of both wings. Support arm 1
1, 1 and 11 are formed from a rear parallel portion 11a and an inclined portion 11b, and the inclined portions 11b and 11b of both wings are integrally joined at a leading portion.

The rear part of the support arm 11 is rotatably supported on the hull 1 by a horizontal shaft (a part of the rotary shaft 4a). The mud plate 5 is fixedly provided at the head of such a support arm 11. A rear rigid anchor 12 similar to the rigid anchor 4 is also provided behind the hull 1. The rear rigid anchor 12 is provided with rigidity and extends long rearward.

The base of the rear rigid anchor 12 is rotatably supported on a rotating shaft 12a. Rear rigid anchor 12
Is supported by the hull 1 via the rotation shaft 12a and can be raised and lowered with respect to the hull 1. The rear rigid anchor 12 is
An arm 12b that rotates integrally via a rotation shaft 12a is provided.

A rear anchor member 13 is attached to a leading portion (rearward with respect to the hull) of the rigid rear anchor 12. The lower end of the rear anchor member 13 is used in a posture inclined downward and forward from the upper end. Another one on the hull
A body winch drum 6B is provided. One end of the wire rope 14 wound by the winch drum 6B is fixed to the rigid portion of the winch stand. By the forward / reverse rotation drive of the winch drum 6B, the rear anchor 12 can be raised and lowered, and the rear anchor member 13 at the leading end of the rear anchor 12 can be moved up and down.

As shown in FIG. 1, the rear anchor member 13 is composed of a single horizontal plate 15. No bottom plate is provided. The rear anchor 12 is formed by parallel two-wing rear support arms 16,16. The rear support arm 16 has a front portion rotatably supported by the hull 1 on a horizontal axis. The rear anchor member 13 is fixedly provided at the leading end of such a rear support arm 16.

The mud plate 5 can also be moved in the front-back direction. The rigid anchor 4 and the rear anchor 12 can be converted into telescopic arms. Further, the mud plate 5 can be replaced.

Next, the operation, operation, control method and the like of the embodiment will be described. FIG. 3 shows a case in which the sludge layer deposited near the embankment 21 of the river is removed. The sediment sludge is formed along the drainage channel from near the embankment 21. A drain gutter is provided along the dike. A drainage channel 25 from the main stream F to the drainage gate toward the drainage gate is formed. Riverbeds 26 are formed on both sides of the drainage channel 25. The sludge layer 22 is formed in such a drainage channel 25.

Such a sludge layer obstructs flow and drainage. The dredging and draining method by the dredging and draining work boat of the present invention includes:
As shown in FIG. 2, the operation is performed when there is enough water above the sludge layer 22 to allow a dredger to enter. As shown in FIG. 3, the hull is guided above the sludge layer in the direction toward the embankment.

The rigid anchor 4 is tilted downward so that the leading end of the rigid anchor 4 pierces the sludge layer 22 to restrain the forward movement of the hull with respect to the water bottom. When the engine output is increased, the leading end of the rigid anchor 4 which is going to move forward bites into the sludge layer, and the forward movement of the hull is prevented. Direction C shown in FIG. 3 when the water above the sludge layer is stagnant
If you want to turn the ship to, turn the rudder straight.

That is, the vertical plane of the rudder is made substantially coincident with the plane including the central longitudinal axis of the hull. In this state, the hull is substantially perpendicular to the embankment. Swing the rear of the hull to the upstream side and
When it is desired to turn the rudder, the rudder of the hull in the orthogonal direction C is turned in the direction indicated by the symbol A in FIG. To maintain the hull in direction U in direction U, steer the rudder straight against the hull. When it is desired to maintain the hull in the direction U when the water flow is flowing on the sludge layer 22 on the downstream side, the rudder is turned to the attitude A.

When turning the hull in the direction D, the rudder 3 is turned in the opposite direction. Thus, the hull can be rotated and moved by operating the rudder from the cockpit as usual. The water in the upper layer of the sludge layer 22 is disturbed by the centrifugal flow of the propulsion device 2. The water flow radiated to the bottom of the water causes convection. The sludge disturbed by convection mixes with water to form a clay-low turbidity.

Such a turbid liquid forms a backward flow created by the propulsion unit 2, joins the main stream F, and flows downstream. By moving the mud member that has penetrated the sludge layer back and forth, the lower sludge layer floats up and breaks into a lump. The back and forth movement of the mud member can be caused by increasing the engine output of the hull.

After the hard sludge layer is destroyed by such a motion, the above-mentioned sludge discharging operation by the propulsion device 2 is performed. Incorporate a work to lift sludge between the sludge discharging operations. The propulsion device forms a radial component water flow on a plane orthogonal to the water bottom and simultaneously forms a rear component water flow, so that the thruster has three functions of the stirring function, the mixing function, and the discharging function at the same time. It has all the functions necessary for dredging.

Further, since the dredging operation is performed at a wide angle while a part of the hull is fixed to the water bottom by the rudder operation, the steering function of the ship itself can be used as it is. When the sludge layer has a long flow direction distance, a plurality of hulls 1 are arranged in series. The water flow formed by the forward hull propulsion unit 2 is further accelerated by the rear hull propulsion unit 2, and the sludge near the embankment can be merged into the main stream at once.

When dredging is made more efficient, the flow of water can be easily improved, and when the flow of water is improved, a good circulation in which the sludge accumulates at a slower rate is created, and the conventional vicious circulation can be cut off. The dredging operation can be performed by reversing the direction of the hull and reversing the propulsion device.

Next, a second embodiment of the present invention will be described. 4 and 5 are a plan view and a front view showing a dredger used in the embodiment of the dredging and draining method by the dredging and draining work boat of the present invention. The dredger is the same as in the first embodiment. The rear rigid anchor of the first embodiment is omitted. The winch structure is different from that of the first embodiment. The dredger includes a hull 1, a propulsion device 2 provided at a rear part of the hull 1, and a rudder 3. A rotary wing is suitable as the propulsion device 3. The rudder 3 is behind or behind the propulsion device 2.

The dredge has an anchor 4. The anchor 4 is a rigid anchor having rigidity and extends forward. The base of the rigid anchor 4 is rotatably supported by a rotating shaft 4a. The rigid anchor 4 has a rotating shaft 4a.
And can be supported by the hull 1 and can be raised and lowered with respect to the hull. A mud plate 5 is attached to the head of the rigid anchor 4.

The mud plate 5 is used in a posture in which the lower end is inclined downward and rearward from the upper end. A winch drum 31 is mounted on the dredger. Winch drum 3
1 is provided with two bodies 31A and 31B. The relationship between the winch drum and the rotating shaft 4a is conceptually shown in FIG. Both ends of the wire rope 32 are fixed to the two winch drums 31A and 31B, respectively.

A wire rope having both ends fixed to both winch drums 31A and 31B includes one winch drum 31A, one wire sheep at the tip of arm 4b that rotates integrally with rotary shaft 4a, fixed pulley 35A, and fixed pulley. 35
B, the other wire sheep at the tip of the arm 4c that rotates integrally with the rotating shaft 4a, and the other winch drum 31B are wound around in this order. The arms 4b and 4c are provided with a lock mechanism.

As shown in FIG. 4, the mud plate 5 includes a horizontal plate 8 and vertical plates 9 of both wings. No bottom plate is provided. The rigid anchor 4 is formed by support arms 11 of both wings. Support arm 1
1, 1 and 11 are formed from a rear parallel portion 11a and an inclined portion 11b, and the inclined portions 11b and 11b of both wings are integrally joined at a leading portion.

The rear part of the support arm 11 is rotatably supported on the hull 1 by a horizontal shaft (a part of the rotary shaft 4a). The mud plate 5 is fixedly provided at the head of such a support arm 11. The operation and action of the second embodiment are different from the first embodiment only in that the rear rigid arm is not used, and the other points are exactly the same.

(Other Embodiments) As the propulsion device for propelling the dredger itself, the one in the above-described embodiment employs ordinary rotating blades. A jet water jet propulsion device can be used to simultaneously increase the hull's propulsion and dredging power. Unlike the outboard motors, inboard and outboard motors, and inboard engines that propel the hull by the thrust of the propeller exposed outside the boat, the water jet system drives the water pump placed inside the boat by the engine and jets the pressurized water backward. This is a method for propelling the hull.

As the water pump, a centrifugal pump, a mixed flow pump, an axial flow pump or the like can be used. Providing a nozzle in the outboard motor can also suppress the spread of the water flow and increase the backward discharge efficiency.

[0045]

The dredging and draining method using the dredging and draining work boat according to the present invention has a high dredging efficiency. All of the capabilities of the ship can be fully exploited for dredging.

[Brief description of the drawings]

FIG. 1 is a plan view showing a first embodiment of a dredging and draining method using a dredging and draining work boat according to the present invention.

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a plan view for explaining the operation of the embodiment of the method for dredging and discharging by the dredging and discharging work boat of the present invention.

FIG. 4 is a plan view showing Embodiment 2 of a dredging and draining method using a dredging and draining work boat according to the present invention.

FIG. 5 is a front view of FIG. 4;

FIG. 6 is a conceptual diagram of a winch structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Hull 2 ... Propulsion machine 3 ... Rudder 4 ... Rigid anchor 5 ... Mud plate 11 ... Support arm 12 ... Rear anchor 13 ... Rear anchor member 16 ... Rear support arm 22 ... Sludge layer

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masahiro Tokushima 1278, Wakamiya, Hyogo-cho, Saga City, Saga Prefecture (72) Inventor, Masami Shirahama 3397-6, Ogata, Kitakata-machi, Kishima-gun, Saga Prefecture (72) Inventor, Minoru Kameda Kumamoto Prefecture 312-8 Yuge, Tatsuta-cho, Kumamoto-shi (56) References JP-A-3-221623 (JP, A) JP-A-4-31513 (JP, A) JP-A 8-35243 (JP, A) (58) Survey Field (Int.Cl. ⁶ , DB name) E02F 3/88

Claims (7)

(57) [Claims] A hull, an anchor capable of ascending and descending from the hull to a water bottom, a propulsion device provided behind the hull for propelling the hull in the front-rear direction, and a rudder for receiving a water flow generated by the propulsion device. A dredging and draining method using a dredging and draining work boat using a dredging and draining work boat, wherein the hull is supported against the bottom of the water with the anchor, and the rudder acts on a water flow created by rotating and driving the propulsion device. Controlling the movement of the hull, and agitating the sludge layer deposited on the bottom of the water by the water flow to form a turbid liquid in which water and sludge are turbid; Dredging and draining method using a mud work boat. 2. The method according to claim 1, wherein the rudder is provided behind the propulsion device. 3. The dredging and draining system according to claim 2, wherein the anchor is a rigid anchor having rigidity, and the rigid anchor prevents forward movement of the hull. Method. 4. The dredging and draining method according to claim 3, wherein the thruster is constituted by a rotating blade, and the stirring is efficiently performed by the rotating blade. 5. The method according to claim 1, wherein the direction of the water flow is controlled by controlling the direction of the rudder. 6. The sludge member according to claim 1, wherein a sludge member for scraping the sludge is attached to a leading portion of the rigid anchor, and the sludge member is softened by moving the rigid anchor. A dredging and draining method using a dredging and draining work vessel, wherein the sludge is stirred by the water flow. 7. A hull, an anchor capable of ascending and descending from the hull with respect to a water bottom, a propulsion device provided behind the hull for propelling the hull in the front-rear direction, and a rudder for receiving a water flow generated by the propulsion device. A dredging and draining method using a dredging and draining work boat using a dredging and draining work boat, wherein the anchor is a rigid anchor having rigidity, and the dredging and draining work boat is arranged in series in the front-rear direction, and a plurality of boats are used. The hulls of a plurality of ships are supported on the water bottom with the anchors, and the rudder is acted on the water flow created by rotating and driving each of the propulsion devices to control the movement of the two hulls. A dredging / draining method using a dredging / draining work boat, in which a turbid liquid in which water and sludge are turbid is formed by stirring the deposited sludge layer, and the turbid liquid is discharged to the mainstream side by each of the propulsion devices.