JPS63122825A - Collector for send of seabed - Google Patents

Abstract

PURPOSE:To permit only good-quality sand in the ground to be collected by a method in which a dredging tower is attached in a vertically movable manner to the hull, and a winch to lift up the dredging tower an a winch to forcibly penetrate the dredging tower driving the tower are provided. CONSTITUTION:A winch 18 to lift up a dredging tower is provided on the deck 13 and a dredging tower 14 is vertically moved through a rope 22. A winch 23 to forcibly penetrate the dredging tower is also provided and the tower 14 is forcibly lowered by winding up a rope 27 while sending out the rope 22. In the operation of dredging sand, the tower 14 and a hose cradle 43 are lowered, and the dredger 15 is penetrated into the seabed ground by the winch 23 as needed. Only good-quality sand can thus be collected from the ground by leaving unnecessary soil even when there is much unnecessary soil in the upper layer of the seabed.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a seabed sand sampling device for a dredger.

Conventional technology and its problems In the conventional seabed sand collecting device of a dredger, a dredger is suspended from the lower end of a flexible hose, and the dredger is caused to sink into the earth and sand on the seabed by its own weight. For this reason, if there is a lot of unnecessary earth and sand in the upper layer of the ocean floor, it may be difficult to penetrate the dredger to the required depth due to the frictional force of the dredger and flexible hose. Since it was simply suspended from the lower end of the hose, there was a problem with its reliability in the direction of the public.

The purpose of this invention is to solve the above-mentioned problems and to provide a highly reliable seabed sand sampling device a that can reliably penetrate the ground of the seabed with a dredger.
Our goal is to provide the following.

Means for Solving the Problems The submarine sand sampling device according to the present invention includes a dredging tower that is provided with a dredging machine at the lower end and is attached to the hull of the ship so as to be able to rise and fall, and a dredging tower that is installed on the hull for lifting and lowering the dredging tower. The dredging tower is equipped with a winch for lifting the dredging tower, and a dredging tower forcing winch installed on the hull for urging the dredging tower downward so that the dredging machine penetrates into the seabed.

When the sand extraction work is not being carried out, the dredging tower is lifted up by the dredging tower lifting winch. When carrying out sand extraction operations, the dredging tower is forcibly lowered by a dredging tower compulsory winch. Then, by lowering the rigid dredging tower,
A dredger installed at the bottom of the vessel ensures that it penetrates into the seabed.

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

The hull (10) of the dredger is provided with a long mouth (11) at the front that passes through it vertically, and a sheath (12) is provided on the deck (13) so as to surround this.

A dredging tower (14) is vertically fitted in the front part of the frontage (11) so as to be freely lowerable. The horizontal cross section of the dredging tower (14) is approximately U-shaped with an opening at the rear, and a dredging machine (15), which will be described later, is attached to the lower end of the dredging tower (14). On both the left and right sides of the dredging tower (14), there are guide rails (
16) are fixed, and these guide rails (16)
) are vertically movably fitted into guides (17) provided at the bottom of both left and right sides of the frontage (11). As shown in detail in Figure 6, a dredging tower lifting winch (18) and a ram tensioner (19) are installed on the deck (13), and the upper part of the system (12) and the height of the dredging tower (14) are installed on the deck (13). A plurality of pulleys (20) and (21) are respectively attached to the intermediate portions of the grooves. Cable (22) of lifting winch (18)
is the ram tensioner (1) and pulleys (20) (21
), the dredging tower (14) is raised by winding the cable (22), and lowered by its own weight by letting out the cable (22). instep f
Also on the fi (13) is a dredging tower forced 8 person 9 inch (23), a ram tensioner (24) and a pulley (2
5), and a pulley (26) is also provided at the top of the dredging tower (14). Forced noble winch (2
After the rope (27) of 3) is hung on the ram tensioner (24) and pulleys (25) and (26), the dredging tower (14)
is fixed at the top of the. And a lifting winch (1
8) while paying out the cable (22) of the forced penetration winch (2).
By winding the cable (27) of 3), the dredging tower (1
4) was forcibly lowered, and the forcible Noble winch (23
) while letting out the rope (27) and lifting winch (18).
By winding up the rope (22) of the dredging tower (14)
is brought to the upper limit.

The hull (10) has a plastic neck (2) of the dredging tower (14).
8) is provided. As shown in detail in Figure 7,!
! The impact device (28) is equipped with a two-stage cylinder (30) whose one end is attached to a bracket (29) of the hull (10) so as to be movable up and down, and the cylinder (30) has a cylinder (30) attached to the other end. A protruding rod (31) is inserted. rod(
31) is slidably received by a bearing metal (32) provided at the intermediate step of the 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 guide (36) is provided for vertically movably receiving the guide rail (16) of the tower (14). An accumulator (37) and a load display (38) are connected to the two oil chambers (30b) of the cylinder (30), and these oil chambers (30a) (30b) are connected to a manual pump unit (39). The metal (32) is connected to the oil tank (40) via the lubricating oil tank (40).
1).

Two guide rails (42) extending vertically are provided on both the left and right sides of the sitose (12), and the left and right sides of the hose cradle (43) are attached to these rails (42) for vertical movement. I'm being kicked. Horse cradle (
43) is provided with a dredging hose receiving part (43a), a dilution water hose receiving part (43b), a cable receiving part (43c) and a jet water hose receiving part (43d) in order from the bottom. ing. 6 [pu part (43aH43bH43cH
43d) is equipped with left and right side plates (44) and a plurality of rollers (45) arranged between them, and a bowse or cable is placed on the rollers (45) between the side plates (44) and moved. It has become so. A cradle lifting winch (46) is provided on the deck (13), and a plurality of pulleys (4B) (49) are provided above the chassis (12) and the hose cradle (43), respectively. The rope (50) of the lifting winch (46) is connected to the ram tensioner (
19) and a pulley (48H49), and by winding the rope (50), the hose cradle (43)
) rises to the top of the chassis (12) along the guide rail (42), and by letting out the cable (50), the hose cradle (43) descends along the guide rail (42) into the opening (11). do.

Inside the hull (10) are a dredging pump (51), a dilution water pump (52), a jet water pump (53), a diesel engine (54) that drives these, and a power generator 1.
(55) etc. are installed.

As shown in detail in Fig. 8, in the center of the dredging machine (15), a sand suction pipe (57) with a sand suction port (56) at its lower end is arranged vertically, and the middle part of this pipe (57) A booster pump (58) is provided at. Around the sand suction pipe (57), there is a first diene which reaches near the bottom end of the sand suction pipe (57), a water jet pipe (59) and a second jet water which reaches the top of the sand suction pipe (57). A spout pipe (60) is provided. A plurality of diagonally downward jet water spouts (61) are provided at the lower end of the first jet water spout pipe (59), and a plurality of jet water spouts (61) facing diagonally upward are provided at the lower end of the second jet water spout pipe (60). A plurality of diagonally downward diagonal water spout ports (62) are provided.

There is also a dilution water outlet (63) around the sand suction pipe (57).
is provided, and a dilution water pipe (64) is connected to this.

A dredging hose payout reel (65) is arranged horizontally just above the deck (13) at the rear of the hull (10).

As shown in detail in FIG. 9, a vertical cylinder (6G) 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 of 6). The upper and lower surfaces and the outer peripheral surface of multiple locations of this gear (67) can be freely rotated by a plurality of horizontal mouth rollers (69070) and vertical rollers (71) attached to a plurality of supports (68) of the hull (10). is supported by Hull (
10) is equipped with a reel drive hydraulic motor (72), which is connected to a worm gear reduction 1 (74) via a clutch (73). The gear (75) fixed to the output shaft of the deceleration tjl (74) meshes with the gear (67) of the reel (65), and the rotation of the motor (72) causes the reel (65) to rotate around the vertical axis. . reel(
A rotary joint (76) is provided at the center of 65),
A dredging hose (77) connected to the upper end of the reel (6
5) is wrapped around.

This dredging hose (77) is hung on the dredging hose holder (43a) of the hose ladle (43) and then passed through the dredging tower (14) to the sand suction pipe (57) of the dredging machine (15).
) is connected to the top edge of the 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 suction port of the dredging pump (51). One end of a sand discharge pipe (79) arranged on the deck (13) is connected to the discharge port of the dredging pump (51).

A dilution water hose pay-out reel (80) is arranged horizontally above the dredging hose pay-out reel (65), and is rotated about a vertical axis by a common motor (72) with the dredging hose pay-out reel (65). There is. Dilution water pump (
The suction port of 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). The dilution water hose (8
4) is wound on a reel (80), and the dilution water hose holder of the hose cradle (43) is hung on the part (43b) and then passed through the dredging tower (14) to be dredged In (15).
) is connected to the upper end of the dilution water pipe (64).

Above the dilution water hose pay-out reel (80), two jet water hose pay-out 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 Seaches 1-(82) via a seawater suction pipe (87). Two jet water pipes (88) (891) are connected to the discharge port of the jet water pump (53), and the first jet wood pipe (88) is connected to the lower end of the rotary joint of the first reel (85). The second jet water pipes (89) are respectively connected to the lower ends of the rotary joints of the second reel (86). A jet water hose (90) is wound around the hose cradle (43).
) is hung on the part (43d) and then passed through the dredging tower (14) and connected to the upper end of the first jet water spout pipe (61). Second reel (
A second jet water hose (91) connected to the upper end of the rotary joint is wound around the hose (91).
1) is hung on the jet water hose receiver (43d) of the hose cradle (43), and then attached to the dredging tower (14).
Upper 9i of the second jet water spout pipe (62) through the inside;
It is connected to the. A booster pump cable (92) is also wound around the first reel (85), and the cable holder of the bow cradle (43) is hung on the part (43C) and then passed through the dredging tower (14) to the booster pump. (58).

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

When the dredger is not in operation, such as when moving the dredger, the hose cradle (43) is raised to the top of the sharp (12), and the dredging tower (14) is also used for dredging.
(15) is raised so that it is above the sea surface.

When performing sand sampling work, the dredging tower (14) is lowered until the dredging tower (15) touches the seabed, and the hose cradle (43) is lowered to the frontage (11). Then, while jet water is spouted from the first jet water jet pipe (61) as necessary, the forced wide mouth winch (23
) by dredging (15) to penetrate the seabed underground.

In addition, when lowering the dredging tower (14), the reels (65) (80) (85) (86) are rotated at the same time, and the hoses (77) (84) (90) (91) and cables (92) are Let's roll out.

Next, the dilution water pump (52), dredging pump (51), booster pump (58) and jet water pump (53)
) and start sand extraction work. At this time, the dredging hose payout reel (65) is placed horizontally near the sea surface, and the dredging hose holder of the hose cradle (43) that receives the middle part of the dredging hose (77) also has a frontage (11). The suction lift is low because it descends to near the sea level. Therefore, sand can be efficiently sucked up by the dredging pump (51). In addition, since the dredger (15) penetrates into the ground of the seabed, it is possible to extract only good quality sand from underground, leaving behind unnecessary soil on the surface of the seabed.

Next, a further 1m (15) of dredged material is penetrated into the ground and sand extraction continues. When the lower end of In (15) reaches the maximum depth, the second jet water outlet (62)
The dredging tower (14) is raised while spouting jet water, and the dredging machine (15) is lifted out of the ground. When the sand collection work is completed, use the hose cradle (4
3) to the F part of Sharp (12) and raise the dredging tower (14) to the storage position. In addition, when raising the dredging tower (14), the reel (65) is raised at the same time.
) (80), (85), and (86) to remove the hose (7).
7) (84) (90) (91) and cable (92)
involve. At this time, raise the hose cradle (43) to the top of the sharp (12) and place the hose (77) (
84) (90) (91) and the intermediate part of the cable (92), thus making it possible to raise the dredging tower (14) to the stowed position.

During the above series of operations, the winches (18) and (23) ropes (22) (
Even if excessive tension is generated on the ram tensioner (1)
9) Absorbed by (24). Further, the back-and-forth motion of the hull is also absorbed by the shock absorber (28).

Dilution water hose (84) and jet water hose (90)
There is no problem even if the ejection line (91) is located at a high position. For this reason, the dilution water hose pay-out reel (80)
and jet water hose pay-out reel (85) (86)
In addition to placing the dilution water hose holder in a high position,
43b) and the jet water hose holder (43dl) are placed in the vertical position of the hose cradle (43) and attached to the deck (
13).

Effects of the Invention Since the seabed sand sampling device according to the present invention has the above-described configuration, the rigid dredging tower is forcibly lowered by the dredging tower forced penetration winch, and the dredging machine is reliably placed underground on the seabed. In addition, the dredging depth can be easily determined. For this reason, in cases where there is a lot of unused soil in the F layer of the seabed6, the unused soil can be left behind and the
1 sand I (J) can be collected.

[Brief explanation of the drawing]

Figure 1 (a side view of a dredger showing an embodiment of the present invention; Figure 2 is a side view of a dredger that does not show a different state from Figure 1;
The figure is a rear view of Fig. 2, Fig. 4 is a plan view of Fig. 2, Fig. 5 is a sectional view taken along line v-v of Fig. 2, and Fig. 6 is a system showing how to hang the dredging tower and bow cradle. Figure 7 is a pipe system diagram showing the shock absorber, Figure 8 is a pipe system diagram of the dredger, and Figure 9 is a pipe system diagram showing the shock absorber.
The figure is a vertical sectional view showing a portion of the dredging hose pay-out reel. (10) ... Hull, (14) ... Dredging tower, (1
5)...'ec dredging rock, (18)... dredging tower lifting winch, (23)... dredging tower forced penetration winch. Patent applicant: Hitachi Zosen Corporation Toyo Construction Co., Ltd.

Claims (1)

[Claims] A dredging tower with a dredging machine installed at the lower end and attached to the ship's hull so that it can be raised and lowered, a dredging tower lifting winch installed on the ship's hull to lift and lower the dredging tower, and a dredging tower that penetrates underground into the seabed. and a dredging tower forced penetration winch provided on the hull to bias the dredging tower downward.