JPH0331405B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a water intake device for taking in eutrophic, clean, and low-temperature deep water, and in particular, it is equipped with a relay water intake tank having buoyancy, and This invention relates to a deep water intake device applied to vertical intake of seawater.

[Conventional technology]

Seawater that exists deep in the ocean (usually over 200 meters) is characterized by being rich in organic nutrients, being clean, and having a low water temperature.
For this reason, applications that take advantage of these characteristics are increasing in various fields such as fisheries, power generation, and industry. Further, such deep water exists offshore at a relatively long distance from the coast and at a certain depth or more.

BACKGROUND ART Conventionally, as a water intake device for taking in deep water, one shown in Japanese Patent Publication No. 61-24238 and the like is known.

This type of water intake device connects a reservoir suspended above the sea surface by a float body to a barge body by a truss structure connecting means, and connects the upper end of a rod antenna-type water intake duct that can be expanded and contracted in the downward direction to the reservoir. At the same time, connect the wire of the hoisting device installed on the float body to the lowest stage of the water intake duct,
By winding and unwinding the wire with a winding device, the water intake duct is expanded and contracted, and the water intake port is adjusted to a desired level of water depth.

[Problem that the invention seeks to solve]

The conventional deep water intake device as described above has the following problems.

(a) The water intake duct is connected in a hanging state to the water intake reservoir suspended above the sea surface by a float body, and these water intake mechanisms are connected to the barge body by a truss structure connection means, so the connection means are complicated. And it becomes heavier.

(b) Since it is impossible to tow the telescope-type water intake duct and it connected to the reservoir,
Laying the intake duct and connecting it to the reservoir must be done at the offshore site. Moreover, special construction machinery is required to sink the intake duct, and the hanging equipment is large-scale, making it difficult to moor the construction equipment. Workability and
There are also safety issues.

(c) In order to improve the accuracy of construction of water intakes that are carried out relatively far offshore, it is necessary to take into account the effects of tides, ocean currents, and waves. If you choose , the available construction time will be shortened, construction will take more days, and work management will be complicated.

(d) Because the barge body and the water intake mechanism, and the reservoir and water intake duct of the water intake mechanism are integrated, the barge body cannot be evacuated during stormy weather such as a typhoon. A strong structure is required, which increases the size of the system.

(e) If the barge required repairs at the home port, it was necessary to cut the intake section from the barge body or install a temporary support system to hold the intake section.

[Purpose of the invention]

The present invention has been made to solve the above-mentioned problems, and it allows the deep water intake section to be towed to an offshore site in an assembled state, and the work of submerging the water intake section at the offshore site can be carried out using special submersion equipment. It is an object of the present invention to provide a deep water intake device which can be easily and safely done without requiring a water intake part and a barge body, etc., and which facilitates connection and separation of a water intake part and a barge body, etc.

[Means for solving problems]

A deep water intake device according to the present invention includes a deep water intake mechanism, a mooring buoy, and a deep water treatment system, and the deep water intake mechanism is integrated with a relay water intake layer of a closed structure and this relay water intake tank. a long water intake pipe connected to the lower end of the relay water intake tank to introduce deep water into the relay water intake tank; and a long water intake pipe connected to the upper end of the relay water intake tank and connected to the deep water A flexible hose for water intake that supplies the water tank to the deep water treatment system, and an air adjustment means connected to the relay water intake tank to control the discharge air from the relay water intake tank and the water intake pipe as the water intake pipe sinks. , wherein the deep water intake mechanism is connected to the mooring buoy via a hanging member, and the water intake pipe including the relay water intake tank is suspended and held in the water with the relay water intake tank on the upper side. It is.

[Action of the invention]

In the present invention, when a deep water intake mechanism is towed to a sinking site and is sunk, it is connected to a mooring buoy by a hanging member, and then the air in the relay water intake tank and water intake pipe is sequentially discharged through the air adjustment means. At the same time, water flows in from the tip of the intake pipe, causing it to settle into the water from the tip side of the intake pipe. Therefore, the work of sinking the deep water intake mechanism is simplified, and the system floating body equipped with the deep water treatment system and the deep water intake mechanism can be easily separated.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

In Fig. 1, 1 is a water intake mechanism that is vertically submerged in seawater to take in deep water.As shown in Fig. 2, this water intake mechanism 1 has a diameter of 4 m and a length.
A closed type relay water intake tank (water intake buffer part) 2 consisting of a cylindrical body with a length of about 16 m, a float part 3 integrally formed on the upper part of the relay water intake tank 2, and a funnel part 2a at the lower end of the relay water intake tank 2 communicate with the inside. Water intake pipes (60 cm in diameter and 250 cm in length) connected and suspended vertically so that
m) 4, and a plurality of water intake hose connection ports 5, 5 are provided on the upper side wall of the relay water intake tank 2. Flexible hoses 6, 6 for water intake are connected to each hose connection port 5, 5, and the hose connection ports 5, 5 are connected to a conductor extending downward parallel to the axial direction of the relay water intake tank 2. water pipe 7,
It is communicated with the inside of the relay water intake tank 2 via 7. In addition, on the upper side wall of the relay water intake tank 2, there is a
An air nozzle 8 for filling and discharging air into the water intake pipe 4 is provided, and an air hose 9 is connected to this nozzle 8.

In FIG. 1, reference numeral 10 denotes a drum-shaped mooring buoy for holding the water intake mechanism 1 vertically and submerged in seawater.
It is designed so that it can be moored in designated sea areas.
In addition, a through hole 10 formed in the axis of the mooring buoy 10
Water intake suspension chain 12 suspended through a
A hook 13 (see FIG. 2) provided at the upper end of the float portion 3 is engaged with the lower end of the float portion 3, thereby holding the entire water intake mechanism 1 suspended in the water.

In FIG. 1, 14 is an offshore subsystem floating body such as a barge or ship on which a deep water treatment system is mounted, and this subsystem floating body 14 has a semicircle with a diameter larger than the outer circumferential shape of the mooring buoy 10 on its front side. The engaging portion 15 is adapted to be engaged with the outer periphery of the mooring buoy 10 via a cushion body 16 such as an old tire, and the mooring buoy 10 and the subsystem. The floating bodies 14 are connected to each other by a wire rope 17, thereby mooring the subsystem floating body 14 to the mooring buoy 10.

A water intake pump 19 driven by a diesel engine 18 is installed on the subsystem floating body 14, and a water sampling main pipe 20 connected to the suction side of the water intake pump 19 has a water sampling pipe 21 for deep water. A sampling pipe 22 for surface water is connected to the sampling pipe 21 for deep water, and a plurality of flow rate regulating valves 2 are connected to the sampling pipe 21 for deep water.
A connecting pipe 24 for connecting the water intake flexible hoses 6, 6 is connected through the water intake mechanisms 3, 23, . are connected to each. Further, a plurality of water intake ports 25, 25, . . . are connected to the surface water sampling pipe 22 via separate flow rate regulating valves 26, 26, .

A water supply pipe 2 is provided on the discharge side of the water intake pump 19.
7 is connected to the water supply pipe 27, and a water sprinkler pipe 28 installed on the floating body 14 is further connected to the water supply pipe 27.

The air hose 9 connected to the air nozzle 8 of the relay water intake tank 2 of the water intake mechanism 1 is connected to an air control unit and an air supply source (both not shown) installed on the subsystem floating body 14. It is.

Next, the operation of this embodiment configured as described above will be explained.

First, a case will be described in which the water intake mechanism 1 is sunk in a desired sea area.

At a factory, a water intake mechanism 1, which is an integral assembly of a relay water intake tank 2, a float part 3, a water intake hose connection port 5, a water conduit 7, and an air nozzle 8, and a water intake pipe 4 manufactured to a desired length are installed on rivers and quays. edge,
Transfer to a calm water area such as a port, and then connect the flexible hose 6 for water intake to the hose connection port 5 of the relay water intake tank 2 and connect it to the air nozzle 8 at a place with stable footing such as on land.
At the same time, several water intake pipes 4 formed to desired lengths are connected to the funnel portion 2a of the relay water intake tank 2 in sequence, and then lowered onto the calm water surface by a crane. At this time, the openings at the non-connecting ends of the flexible hose 6 and the air hose 9 are temporarily closed with a lid member to prevent seawater from entering.

Thereafter, the water intake pipe 4 formed to a desired length is successively connected to the trailing end and pulled out onto the calm water surface. If necessary, construction auxiliary floats 29 are attached to the water intake pipes 4 connected in a straight line at desired intervals as shown in FIG. 3, so that the water intake pipes 4 themselves float on the water surface.

In addition, for the air hose 9 that tends to settle,
Attach the float 29 if necessary. Also,
In order to prevent seawater from flowing into the water intake pipe 4 floating on the water surface, as shown in Fig. 4, a rapture is installed at the water intake port at the end of the water intake pipe 4, which is destroyed by the water pressure when the water reaches a predetermined depth.・Install disk 30.

The water intake mechanism 1 prepared as described above is floated on the water surface as shown in FIG. A suspension chain 12 is connected to a mooring buoy 10 installed at a mooring buoy 10 by inserting it into the center through hole 10a from the lower end side as shown in FIG. Next, the engaging portion 15 of the subsystem floating body 14 that has been towed by the tugboat 31
is engaged with the outer periphery of the mooring buoy 10 via the cushion body 16, and the two are connected by a wire rope 17. After that, the flexible hose for water intake 6,
After the free ends of the subsystems 6 are pulled up from the water onto the subsystem floating body 14 and their closing covers are removed, they are connected to the water intake connecting pipes 24, respectively. Furthermore, the air hose 9 is connected to the air control section on the subsystem floating body 14.

The above flexible hose 6 and air hose 9
When the connection is completed, the floats 29 attached to the water intake pipe 4 are sequentially removed from the tip side of the water intake pipe 4. Then, the water intake pipe 4 starts to sink sequentially from the tip side due to its own weight. When the tip end of the water intake pipe 4 reaches a predetermined water depth, the rapture disk 30 is destroyed and seawater flows into the water intake pipe 4. If the water intake pipe 4 has sufficient buoyancy to float on the sea surface, the rupture disk 30 is physically destroyed on the sea surface, allowing seawater to infiltrate. At this time, the air in the relay water intake tank 2 communicating with the water intake pipe 4 is discharged to the atmosphere through the air nozzle 8, the air hose 9, and the air control section (not shown). , the settling speed of the water intake pipe 4 can be controlled.

When all the air in the relay water intake tank 2 is exhausted,
The relay water intake tank 2 and the water intake pipe 4 are filled with seawater, and the water intake pipe 4 and the relay water intake tank 2 are vertically suspended from the mooring buoy 10 by the suspension chain 12.

Next, we will discuss the case of pumping deep water.

In this case, when the diesel engine 18 is started, the water intake pump 19 is rotated, and the surface water flow rate adjustment valve 26 is opened, the surface water flows from the water intake port 25 → flow rate adjustment valve 26 → water sampling pipe 22 → main pipe 20 → The water is sprayed onto the sea surface from the water spray pipe 28 via the pump 19 → water pipe 27.

On the other hand, when the flow rate adjustment valve 23 for deep water is opened, the deep seawater on the seabed side flows from the water intake pipe 4 to the relay water intake layer 2.
→ Water conduit 7 → Hose connection port 5 → Flexible hose 6 → Connecting pipe 24 → Flow rate adjustment valve 23 → Water sampling pipe 21
→The water is sucked through the main pipe 20 by the pump 19, mixed with surface water, and sprayed onto the sea surface from the sprinkler pipe 28.

By mixing deep water, which is low temperature and rich in organic nutrients, with surface water, the temperature of the seawater to be sprayed becomes suitable for fish farming, etc., and deep water rich in organic components is sprayed. fish farming or attracting fish.

In addition, due to the occurrence of a typhoon, etc., the subsystem floating body 1
4, or when repairing the subsystem floating body 14 and the processing system installed therein, disconnect the flexible hose 6 and air hose 9 from the subsystem floating body 14 side, and disconnect the wires. Just untie the rope 17 and move the subsystem floating body 14 to the mooring buoy 1.
It can be easily separated from 0 and easily towed to a dock, etc.

Therefore, in this embodiment as described above, the water intake mechanism 1 can be assembled in a calm water area such as a port and towed to the sinking area, and when the water intake mechanism 1 is sunk, it is possible to use a closed type Since the mechanism is such that the air in the relay water intake layer 2 and the water intake pipe 4 is discharged while seawater is allowed to flow in and settle in sequence, the sinking work at offshore sites is simple and safe, and it is not as easy as conventional water intake. There is no need for a dedicated construction organization for the department.

Further, by changing the length of the hanging chain 12 that connects the mooring buoy 10 and the water intake mechanism 1, the water intake depth can be easily adjusted. Furthermore, the water intake mechanism 1 connects the mooring buoy 10 to the chain 12.
Therefore, if the water intake mechanism 1 is designed to be installed at a depth of 5 m to 10 m or more where the influence of waves can be reduced, there is no need for the water intake mechanism to have a rigid wave-resistant structure, making it economical. It is. In addition, in the unlikely event that the suspension chain 12 with the mooring buoy 10
Even if the float part 3 is cut off, the float part 3 is placed at the top of the relay water intake tank 2.
, the water intake mechanism 1 can be maintained in an upright or inclined state on the seabed, and the water intake mechanism 1 can be easily retrieved and pulled up even in a place where it is installed in deep water.

Next, other embodiments of the present invention will be described.

FIG. 5 shows a second embodiment of the water intake mechanism 1 according to the present invention. In FIG. 5, one (or a plurality of) intermediate floats 32 are installed in the middle part of the water intake pipe 4 connected to the relay water intake tank 2 with the float part 3 attached.
This makes it possible to adjust the buoyancy of the water intake mechanism 1 during towing or water intake operation.

FIG. 6 shows a third embodiment of the water intake mechanism 1 according to the present invention. The difference in the embodiment shown in FIG. 2 is that the float part 3 is composed of a cylindrical body with a large volume, and a relay water intake tank 2 with a smaller volume is formed in the upper part of the float part 3. A hose connection port 5 communicates with the upper end of a water intake pipe 4 inserted through the axis line inside the float part 3 to 2, and further communicates with a water conduit 7 provided on the upper surface of the relay water intake tank 2.
A flexible hose 6 for water intake is connected to.

In this embodiment, by making the volume of the float part 3 larger than that of the water intake tank part, the water intake mechanism 1
This has the effect of increasing the buoyancy of the mooring buoy and reducing the load on the mooring buoy 10. In order to reduce the load on the mooring buoy 10, an intermediate float 32 as shown in FIG. 5 can also be used.

FIG. 7 shows an example in which the water intake mechanism 1 is also used as a mooring cable for the mooring buoy 10.

That is, as shown in FIG. 7, an anchor 34 is connected via a chain 33 to the lower end of the water intake pipe 4 of the water intake mechanism 1 connected to the mooring buoy 10 by a hanging chain 12, and the anchor 34 is driven into the seabed 35. , to function as a mooring line for the mooring buoy 10. By providing a plurality of intermediate floats 36 in the middle of the water intake pipe 4, the load on the mooring buoy 10 can be reduced.

However, in this case, it is necessary to take into account the effects of wind, waves, tides, ocean currents, etc. on the floating subsystem, water intake, mooring buoy, etc., and design it to the required strength.

In the above embodiment, a case has been described in which the water intake mechanism 1 is towed to the submerged area while floating on the water surface, but if the water intake pipe 4 is very long or the waves are large, there may be concerns about the strength of the water intake pipe. In this case, the float part 3 and the auxiliary float 29
By adjusting the buoyancy of the water intake mechanism 1, the entire water intake mechanism 1 is towed in a suspended state buried under the sea surface. In this way, the burden on the strength of the water intake pipe 4 related to the bending moment can be reduced.

Furthermore, as shown in FIG. 8, by inserting a flexible pipe 37 into the appropriate position of the water intake pipe 4, a long water intake pipe can be considered as a plurality of short pipes, and the burden on strength related to bending moment can be reduced. It can be further reduced.

Furthermore, as shown in FIG. 9, in order to increase the strength of the water intake pipe 4, a plurality of ribs 38 having an appropriate cross-sectional shape extending in the axial direction are provided around the water intake pipe 4 as reinforcing members. You can also do it. In addition, in the above embodiment, a case was described in which the seawater intake device according to the present invention is applied to an offshore fishing plant, but it is not limited to this, but is applicable to power generation, industrial plants, recovery of underwater precious metal components such as uranium, etc. Of course, it can also be applied.

〔Effect of the invention〕

As described above, the present invention includes a deep water intake mechanism, a mooring buoy, and a deep water treatment system,
The deep water intake mechanism includes a relay water intake tank having a closed structure, a float part for imparting buoyancy that is integrally provided to the relay water intake tank, and a float part that is connected to the lower end of the relay water intake tank to allow deep water to flow into the relay water intake tank. a long water intake pipe that introduces water, a flexible hose for water intake that is connected to the upper end of the relay water intake tank and supplies deep water to the deep water treatment system, and a flexible hose that is connected to the relay water intake tank and that is connected to the relay water intake tank and and an air adjustment means for controlling discharge air from the water intake pipe as the water intake pipe sinks, the deep water intake mechanism being connected to the mooring buoy via a hanging member and with the intermediate water intake layer on the upper side. Since the water intake pipe including the relay water intake tank is suspended underwater, the deep water intake mechanism can be used in ports, harbors, etc.
It can be assembled in calm water locations such as near a quay, and can be towed to the sea area where it will be sunk in its assembled state. Therefore, assembly and connection work at the offshore site is no longer necessary, and the submergence work is simplified, and the degree to which the submergence work is influenced by rough weather etc. is reduced, and the control of the submergence work process is also facilitated.

In addition, when sinking the deep water intake mechanism, after removing the auxiliary float for construction from the intake pipe, the air is discharged from the relay intake tank to allow it to settle from the tip of the intake pipe, allowing for gentle sinking. This makes the work safe and easy.

Furthermore, since the deepening water intake mechanism is suspended from the mooring buoy by a hanging member such as a chain, the water intake depth can be easily adjusted by changing the length of the hanging member.

In addition, the system floating body equipped with the deep water intake mechanism, mooring buoy, and deep water treatment system can be separated from each other, making it easier to evacuate important system floating bodies during stormy weather or take them to a dock for repairs. effective.

[Brief explanation of the drawing]

Fig. 1 is an overall schematic configuration diagram showing an example of the deep water intake device according to the present invention, Fig. 2 is a side view of the deep water intake mechanism section in Fig. 1, and Fig. 3 shows the towed state of the water intake mechanism. An explanatory diagram, Figure 4 is a sectional view showing an example of the tip of the water intake pipe being blocked during towing, and Figure 5.
Figures 6 and 7 are side views showing other embodiments of the water intake mechanism of the present invention, Figure 8 is a sectional view of reinforcing the water intake pipe, and Figure 9 is a side view showing another embodiment of the water intake mechanism of the present invention. FIG. 4 is an explanatory diagram showing an example of a case where the device is also used as a cable. 1...Water intake mechanism, 2...Relay water intake tank, 3...Float section, 4...Water intake pipe, 5...Hose connection port, 4...Flexible hose for water intake, 8...Air nozzle, 9...Air Hose, 10... Mooring buoy, 11... Mooring line, 12... Hanging chain, 14... Subsystem floating body.

Claims (1)

[Claims] 1. A deep water intake mechanism, a mooring buoy, and a deep water treatment system, wherein the deep water intake mechanism is integrally provided with a relay water intake tank having a closed structure and the relay water intake tank. a long water intake pipe connected to the lower end of the relay water intake tank to introduce deep water into the relay water intake tank; and a long water intake pipe connected to the upper end of the relay water intake tank to introduce deep water into the relay water intake tank. the deep water treatment system, comprising: a flexible hose for water intake supplying to the deep water treatment system; and an air adjustment means connected to the relay water intake tank to control exhaust air from the relay water intake tank and the water intake pipe as the water intake pipe sinks; The water intake mechanism is connected to the mooring buoy via a hanging member so that the water intake pipe including the relay water intake tank is suspended and held in the water with the relay water intake tank on the upper side. Deep water intake device.