JPH055010B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a seabed sand collecting device for a dredger.

BACKGROUND ART AND PROBLEMS In a conventional seabed sand collecting device for a dredger, a reel for feeding out a dredging hose connected to a dredging machine is arranged vertically on the upper part of the ship. Therefore, the suction lift becomes large, and with a normal dredging pump, there is a limit to the suction lift, making it difficult to suck up seabed sand. For this reason, conventional devices use ejectors, but the ejectors have the problem of poor suction efficiency.

An object of the present invention is to solve the above-mentioned problems and to provide an economical seabed sand extraction device with good suction efficiency that allows a dredging pump to be used as a suction pump.

Means for Solving the Problems The seabed sand extraction device according to the present invention includes a jet water pump connected to a jet water hose of a dredger to cut down seabed sand, and a jet water pump connected to a jet water hose of a dredger to dilute seabed sand. A dilution water pump connected to a hose and a dredging pump connected to a dredging hose of a dredger for sucking up seabed sand are provided on the hull, and a dredging hose payout reel is placed horizontally near the water surface of the hull, A hose cradle is attached to a shear provided on the hull so that it can move up and down, and the middle part of the dredging hose is hung on the hose cradle.

Function When sand extraction work is not being carried out, the hose cradle is raised and the dredging machine is also raised above the water surface. By raising the hose cradle and lifting the middle part of the dredging hose,
It becomes possible to raise the dredger above the water surface. When performing sand sampling work, the dredging machine is lowered to the seabed, the hose cradle is also lowered to near the water surface, and the middle part of the dredging hose is located near the water surface. The hose cradle is attached to the shear provided on the hull so that it can be raised and lowered independently of the dredging machine.
The hose cradle can be lowered to near the water surface, and the intermediate portion of the dredging hose hung on the hose cradle can be positioned near the water surface. During sand collection work, the suction lift of the dredging hose can be increased by being able to position the middle part of the dredging hose near the water surface and by placing the dredging hose feed reel horizontally near the water surface. This will allow sand to be sucked up by dredging pumps.

Embodiment Figures 1 to 5 show a dredger and a seabed sand sampling device.

A hull 10 of the dredger is provided with a longitudinally long opening 11 that passes through it vertically, and a shear 12 is provided on a deck 13 so as to surround this.

A dredging tower 14 is vertically fitted in the front part of the opening 11 so as to be movable up and down. The horizontal cross section of the dredging tower 14 is approximately U-shaped with an open rear end, and a dredging machine 15, which will be described later, is attached to the lower end of the dredging tower 14.
Guide rails 16 extending vertically are fixed to both left and right sides of the dredging tower 14, and portions of these guide rails 16 are fitted into guides 17 provided at the bottom of both left and right sides of the opening 11 so as to be vertically movable. There is. As shown in detail in FIG. 6, a dredging tower lifting winch 18 and a ram tensioner 19 are provided on the deck 13, and a plurality of pulleys 2 are installed at the upper part of the shear 12 and at the middle of the height of the dredging tower 14, respectively.
0,21 are attached. Lifting winch 1
8 cable 22 connects to the ram tensioner 19 and pulley 2
0, 21, and by winding the cable 22, the dredging tower 14 is raised, and by letting out the cable 22, the dredging tower 14 is lowered by its own weight. Also on the deck 13 are a dredging tower forced penetration winch 23, a ram tensioner 24 and a pulley 2.
5 is provided, and a pulley 26 is also provided at the top of the dredging tower 14. Forced penetration winch 2
3 cable 27 connects to the ram tensioner 24 and pulley 2
5, 26 and then fixed to the top of the dredging tower 14. And lifting winch 18
By winding up the cable 27 of the forced penetration winch 23 while letting out the cable 22 of the dredging tower 14, the dredging tower 14 is forcibly lowered.
By winding up the dredging tower 14, the dredging tower 14 is raised.

The hull 10 includes a shock absorber 28 for the dredging tower 14.
is provided. As shown in detail in Figure 7,
The shock absorber 28 has one end attached to the bracket 2 of the hull 10.
The cylinder 30 is provided with a two-stage cylinder 30 attached to the cylinder 9 so as to be vertically movable, and a rod 31 protruding from the other end is inserted into the cylinder 30. Rod 3
1 is slidably received by a bearing metal 32 provided at an intermediate step of a cylinder 30, and pistons 33 and 34 are provided on both sides thereof. A connecting frame 35, which is approximately U-shaped when viewed from above, is attached to the tip of the rod 31 protruding outside the cylinder 30 so as to be movable up and down. A movably received guide 36 is provided. cylinder 3
An accumulator 37 and a load indicator 38 are connected to the two oil chambers 30a and 30b.
These oil chambers 30a, 30b are connected to an oil tank 40 via a manual pump unit 39.
Further, the metal 32 is connected to a lubricating oil tank 41.

Two guide rails 42 extending vertically are provided on both left and right sides of the shear 12, and the left and right sides of a hose cradle 43 are attached to these rails 42 so as to be vertically movable. The hose cradle 43 is provided with a dredging hose receiving section 43a, a dilution water hose receiving section 43b, a cable receiving section 43c, and a jet water hose receiving section 43d in this order from the bottom. Each receiving part 43a, 43b, 43
c, 43d are equipped with left and right side plates 44 and a plurality of rollers 45 arranged between them, and the side plates 44
A hose or cable is placed on rollers 45 between the two and moved. Deck 13
A cradle lifting winch 46 is provided above,
A plurality of pulleys 48 and 49 are provided above the shear 12 and the hose cradle 43, respectively. A rope 50 of a lifting winch 46 is hung around a ram tensioner 19 and pulleys 48, 49,
By winding the cable 50, the hose cradle 4
3 rises along the guide rail 42 to the top of the shear 12, and by letting out the cable 50, the hose cradle 43 descends along the guide rail 42 into the opening 11.

Inside the hull 10 are a dredging pump 51, a dilution water pump 52, a jet water pump 53, and a diesel engine 54 and a generator 5 that drive these.
5 etc. are installed.

As shown in detail in FIG. 8, a sand suction pipe 57 having a sand suction port 56 at the lower end is arranged vertically in the center of the dredging machine 15, and a booster pump 58 is provided in the middle of this pipe 57. . Around the sand suction pipe 57, there is a first pipe that reaches near the bottom end of the sand suction pipe 57.
A jet water jet pipe 59 and a second jet water jet pipe 60 reaching the top of the sand suction pipe 57 are provided. A plurality of jet water spouts 61 facing diagonally downward are provided at the lower end of the first jet water spouting pipe 59, and a plurality of jet water spouts facing diagonally upward and diagonally downward are provided at the lower end of the second jet water spouting pipe 60. 62 are provided. Further, a dilution water outlet 63 is provided around the sand suction pipe 57, and a dilution water pipe 64 is connected to this.

A dredging hose payout reel 65 is horizontally arranged just above the deck 13 at the rear of the hull 10. 9th
As shown in detail in the figure, a vertical cylinder 66 is fixed to the lower surface of the center of the reel 65.
An annular gear 67 is fixed to the outer circumferential surface of the lower end. Both upper and lower surfaces and the outer peripheral surface of the gear 67 are rotatably supported by a plurality of horizontal rollers 69 and 70 and a vertical roller 71 attached to a plurality of supports 68 of the hull 10. A reel drive hydraulic motor 72 is installed in the hull 10, and a worm gear reducer 74 is connected to this via a clutch 73. The gear 75 fixed to the output shaft of the reducer 74 is the gear 67 of the reel 65.
The rotation of the motor 72 causes the reel 65 to rotate around the vertical axis. A rotary joint 76 is provided at the center of the reel 65, and a dredging hose 77 connected to the upper end of the rotary joint 76 is wound around the reel 65. This dredging hose 77 is hung on the dredging hose receiving portion 43a of the hose ladle 43, and then passed through the dredging tower 14 and connected to the upper end of the sand suction pipe 57 of the dredging machine 15. One end of a dredging pipe 78 is connected to the lower end of the rotary joint 76 of the reel 65, and the other end of the dredging pipe 78 is connected to the dredging pump 51.
connected to the suction port. A sand discharge pipe 79 arranged on the deck 13 is provided at the discharge port of the dredging pump 51.
is connected at one end.

A dilution water hose pay-out reel 80 is horizontally arranged above the dredging hose pay-out reel 65, and is rotated about a vertical axis by a motor 72 common to the dredging hose pay-out reel 65. The suction port of the dilution water pump 52 is connected to the sea chest 82 via a seawater suction pipe 81, and the discharge port is connected to the lower end of the rotary joint of the reel 80 via a dilution water pipe 83. A dilution water hose 84 connected to the upper end of this rotary joint is wound around a reel 80, and the dilution water hose receiving portion 43b of the hose cradle 43
After that, it passes through the dredging tower 14 and is connected to the upper end of the dilution water pipe 64 of the dredging machine 15.

Above the dilution water hose delivery reel 80, two jet water hose delivery reels 85, 86 are arranged so as to be rotatable about the same horizontal axis extending left and right. The suction port of the jet water pump 53 is connected to the seadest 82 via a seawater suction pipe 87. Two jet water pipes 88 and 89 are connected to the discharge port of the jet water pump 53, and the first jet water pipe 88 is connected to the lower end of the rotary joint of the first reel 85, and the second jet water pipe 8
9 are connected to the lower ends of the rotary joints of the second reel 86, respectively. A first jet water hose 90 connected to the upper end of the rotary joint is wound around the first reel 85, and this hose 90 is connected to the jet water hose receiving portion 43d of the hose cradle 43.
After that, it is passed through the dredging tower 14 and connected to the upper end of the first jet water spouting pipe 59. A second jet water hose 91 connected to the upper end of the rotary joint is wound around the second reel 86, and this hose 91 is attached to the hose cradle 43.
After being hung on the jet water hose receiving portion 43d, the jet water hose is passed through the dredging tower 14 and connected to the upper end of the second jet water jet pipe 60. A booster pump cable 92 is also wound around the first reel 85, and after being hung on the cable receiving portion 43c of the hose cradle 43, the cable 92 is passed through the dredging tower 14 and connected to the booster pump 58.

A mooring winch 93 and the like are provided on the deck 13.

When sand extraction work is not being performed, such as when the dredger is moving, the hose cradle 43 is
The dredging tower 14 is also raised so that the dredging machine 15 is above the sea surface.

When performing sand sampling work, the dredging tower 14 is lowered until the dredger 15 touches the seabed, and the hose cradle 43 is lowered to the opening 11. Then, the dredger 15 is penetrated into the ground of the seabed by the forced penetration winch 23 while jetting jet water from the first jet water spout 61 as necessary. Note that when lowering the dredging tower 14, the reels 65, 80, 85, 86 are simultaneously rotated to let out the hoses 77, 84, 90, 91 and the cable 92.

Next, the dilution water pump 52, dredging pump 51, booster pump 58, and jet water pump 53 are operated to start sand sampling work. At this time, the dredging hose reel 65 is placed horizontally near the sea surface, and the dredging hose receiving portion 43a of the hose cradle 43 that receives the intermediate portion of the dredging hose 77 has also been lowered to near the sea surface within the opening 11. Suction head is low. Therefore, the dredging pump 51 can efficiently suck up sand. Further, since the dredger 15 penetrates into the ground of the seabed, it is possible to extract only good quality sand from underground, leaving unnecessary earth and sand on the seabed surface.

Next, the dredger 15 is further penetrated into the ground to continue the sand extraction work. When the lower end of the dredging machine 15 reaches the maximum depth, the dredging tower 14 is raised while jetting water from the second jet water spout 62, and the dredging machine 15 is extracted from the ground. When the sand sampling work is completed, the hose cradle 43 is raised to the top of the shear 12, and the dredging tower 14 is raised to the storage position. In addition,
When the dredging tower 14 is raised, the reels 65, 80, 85, 86 are rotated at the same time to reel in the hoses 77, 84, 90, 91 and the cable 92. At this time, the hose cradle 43 is raised to the top of the shear 12, and the hoses 77, 8
4, 90, 91 and the intermediate portion of the cable 92, it becomes possible to raise the dredging tower 14 to the storage position.

In the above series of operations, due to vertical movement of the hull 10, the ropes 22 of the winches 18, 23,
Even if excessive tension occurs in the ram tensioner 27, it is absorbed by the ram tensioners 19 and 24. Further, the back and forth vibration of the hull 10 is also absorbed by the shock absorber 28.

Dilution water hose 84 and jet water hose 9
There is no problem even if the ejection line such as 0.91 is located at a high position. For this reason, the dilution water hose delivery reel 80 and the jet water hose delivery reel 8
5 and 86 are arranged at high positions, and the dilution water hose receiving part 43b and the jet water hose receiving part 43d are arranged at high positions of the hose cradle 43, thereby making effective use of the deck 13.

Effects of the Invention Since the submarine sand sampling device according to the present invention has the above-described configuration, the suction efficiency by the dredging hose is increased, and the dredging pump can be used as a suction pump. Therefore, it is possible to obtain a highly reliable and economical seabed sand sampling device.

[Brief explanation of the drawing]

FIG. 1 is a side view of a dredger showing an embodiment of the present invention, FIG. 2 is a side view of the dredger showing a state different from FIG. 1, FIG. 3 is a rear view of FIG. 2, and FIG.
5 is a sectional view taken along line 2--
Figure 6 is a system diagram showing how to hang the dredging tower and hose cradle, Figure 7 is a pipe system diagram showing the shock absorber, Figure 8 is a pipe system diagram of the dredging machine, and Figure 9 is a section of the dredging hose pay-out reel. FIG. 10... Hull, 12... Shearth, 15... Dredging machine, 43... Hose cradle, 51... Dredging pump, 52... Dilution water pump, 53... Jet water pump, 65... Dredging hose delivery reel,
77... Dredging hose, 84... Dilution water hose, 9
0,91...Jet water hose.

Claims (1)

[Claims] 1. A jet water pump connected to the dredger's jet water hose for cutting down the seabed sand, a dilution water pump connected to the dredger's dilution water hose for diluting the seabed sand, and a dilution water pump connected to the dredger's dilution water hose for diluting the seabed sand and for sucking up the seabed sand. A dredging pump connected to the dredging hose of a dredging machine is installed on the hull, a dredging hose feeding reel is placed horizontally near the water surface of the hull, and a hose cradle is attached to the shear provided on the hull so that it can be raised and lowered. A seabed sand sampling device in which the middle part of a dredging hose is hung on a hose cradle.