WO2011118228A1

WO2011118228A1 - Water intake device

Info

Publication number: WO2011118228A1
Application number: PCT/JP2011/001773
Authority: WO
Inventors: 健策前田
Original assignee: 日揮株式会社
Priority date: 2010-03-26
Filing date: 2011-03-25
Publication date: 2011-09-29
Also published as: BR112012023827A2; AU2011230933A1

Abstract

Disclosed is a water intake device for pumping water up from the sea or a lake, which is easy to install and maintain, and the vertical orientation of which is resistant to collapse. A water intake pipe (3) is composed of a plurality of polyethylene pipe bodies (4) disposed in a lengthwise direction, and the uppermost pipe body (4) is fixed to the bottom (12a) of a vessel. A tensile cable (5) is passed through the inside of the water intake pipe (3), a weight provided to the lower side of the lowest pipe body (4) is hung from the tensile cable (5), and the upper end of the tensioning cable (5) is wound around a hoisting mechanism on the vessel, normally generating torque in the upward hoisting direction. Thus, the pipe bodies (4) are pressure welded and the linearity thereof is maintained.

Description

Water intake equipment

The present invention relates to a water intake device that is provided on a floating body on the ocean or on a lake and takes in, for example, deep ocean water from the water.

FLNG (Floating Liquidated Natural Gas), which is a natural gas liquefaction facility on the ocean, uses seawater for cooling the liquefied refrigerant. The cooling seawater is technically preferable to be clear and stable at a low temperature of a depth of 200 m or more, rather than a warm surface layer. However, when constructing equipment that takes water from such depths, the weight of the entire water intake pipe becomes considerably large, and it is difficult to install it on-site so as not to create an excessive load on the long main body. There are difficulties. For example, if the intake pipe is simply composed of a single steel pipe, the weight of the main body acts greatly on the upper portion of the intake pipe, so that it is difficult to obtain a long service life due to fatigue accumulation. Also, in this case, the installation work on the hull requires a large-scale work such as releasing a hold on one end and standing up with a fleet consisting of multiple barges and a steel pipe lying on the sea surface. The work is impossible from the floating body. Even in the method using a flexible hose, since the weight of the hose is added to the upper part of the hose, severe restrictions are imposed on the strength.

Here, the present inventor believes that the following items are required for intake pipes corresponding to deep ocean water.
a. The main body is light, and a special fleet such as a crane ship is not required for installation of intake pipes at sea.
b. Easy to transport intake pipes to the local sea area.
c. Can be easily lifted, inspected and re-installed from the ship.
d. Fatigue strength of intake pipes is sufficiently large to ensure a long service life, and material deterioration is small.
e. The intake pipe and the equipment related to the intake pipe installation shall not place any significant restrictions on the layout of the hull and on the ship.
Patent Document 1 describes a marine fertilizer in which a single, for example, 100 ton intake pipe is connected to a main body floating on the ocean via a special joint. However, in this design, the greater the water intake depth, the greater the load on the suspension support member and the upper part of the water intake pipe, resulting in greater fatigue accumulation and limited durability.
Patent Document 2 describes a configuration in which a water intake pipe is supported on a ship bottom via a flexible connector and a plurality of water intake pipes having such a support structure are arranged in parallel. However, this intake pipe requires a spacer that serves as a guide in water in order to arrange a plurality of intake pipes in parallel. As a result, a special construction machine must be used to install intake pipes and spacers in the sea.

JP 2005-291464 A U.S. Patent Publication No. 7,318,387B2

The present invention has been made under such circumstances, and its purpose is to easily perform installation work and maintenance when pumping water from the sea or lake, and even though it is a split type. An object of the present invention is to provide a water intake device in which the vertical posture of the water intake pipe is not easily broken.

The water intake device of the present invention is
In an apparatus for taking water by a water intake pipe provided on a floating body on the ocean or lake and extending downward,
A plurality of pipes that are arranged in the lengthwise direction to form a water intake pipe;
A fixing portion for fixing the uppermost tube of these tubes to the floating body;
A water intake provided in a lowermost tube of the plurality of tubes;
A tension cord provided so that an upward force is applied to the lowermost tubular body by extending along the tubular body from the floating body side and being pulled upward.
Tension that is provided on the floating body and that applies a tensile force to the tension cable in a state where the intake pipe is fixed to the floating body in order to apply a compressive force in the length direction to the intake pipe. And a cord holding part.

Examples of specific embodiments of the present invention will be listed.
At least the specific gravity of the material of the tube other than the uppermost tube and the lowermost tube is 0.88 to 2.2, for example. Tubes adjacent to each other vertically are fitted to each other. The tension cord is passed through the tube. The tubular body is provided with a guide portion for guiding the tension cord to the central portion of the tubular body.

At least one of the upper end portion and the lower end portion of the tubular body is configured by a sleeve member attached to the main body portion of the tubular body,
The guide portion is provided on the sleeve member.
One of the pipes adjacent to each other in the vertical direction is fitted to the other pipe via the guide portion.
The connecting portion between the tubular bodies is watertightly surrounded by a bellows body that can be expanded and contracted in the longitudinal direction of the tubular bodies.
The tension cord is configured to be divided into each tubular body.
The lowermost tube body is provided with a weight.

The water intake device of another invention is
In an apparatus for taking water by a water intake pipe provided on a floating body on the ocean or lake and extending downward,
A plurality of pipes that are arranged in the lengthwise direction to form a water intake pipe;
A connecting member for connecting these pipes to each other;
A fixing portion for fixing the uppermost tube of the plurality of tubes to the floating body;
A water intake provided in a lowermost tube of the plurality of tubes;
One end side is fixed to the floating body side, a cord passing through the inside of the plurality of pipes,
A weight suspended from the lower end of the rope;
And a guide portion provided on the tube body for guiding the cable.
In the water intake device according to another aspect of the invention, the weight is provided on the lower side of the lowermost tube, for example. Moreover, the guide part is provided so that a cable may be guided, for example in the center part of a tubular body.

In the present invention, when water is pumped from the sea or lake, a plurality of pipes are arranged in the length direction to constitute a water intake pipe. And, using a tension cord extending along the tube body, the upward pulling force is applied to the lowermost tube body by pulling the tension cord upward while the intake pipe is fixed to the floating body. The tube body group is pressed against the hull side, and the tube bodies 4 are pressed against each other. Since the intake pipe is divided in this way, installation work and maintenance from the floating body itself can be performed without depending on a special external fleet. In addition, the vertical posture with respect to the water flow is not easily collapsed, and the seams between the pipe bodies can be watertight to some extent. Furthermore, if the material of the pipe body is close to water, the tension of the tension measure can be reduced. Therefore, a small tension cord holding part such as a hoisting mechanism can be used, and installation work and maintenance can be performed more easily. It becomes easier.

According to another invention, a plurality of pipes are arranged in the length direction to constitute a water intake pipe, and a rope whose upper end is fixed to a floating body is guided along a guide part provided on the water intake pipe. A weight is suspended from the lower end of the lever. Therefore, since the intake pipe is divided, installation work and maintenance are facilitated, and the presence of the rope makes it possible to have a restoring force to linearity against bending of the entire intake pipe. In addition, since the weight of the weight is borne by the cable, even if the specific gravity of the intake pipe is greater than that of seawater (or lake water), the weight of the intake pipe is not applied, which is advantageous in reducing the fatigue level of the intake pipe. It is.

It is a whole lineblock diagram showing an embodiment of a water intake device of the present invention. It is a longitudinal cross-sectional view which shows the state which fixed the uppermost pipe body in embodiment to the ship bottom. It is a side view which shows the intake pipe in embodiment. It is a longitudinal cross-sectional view which shows the connection structure of a tubular body. It is a longitudinal cross-sectional view which shows the lowermost tube and weight. It is a cross-sectional top view in the guide part of a tubular body. It is a perspective view which shows a mode that the winch mechanism which is a tension | tensile_strength holding | maintenance part is pulling the tension measure inside a floating body. It is explanatory drawing which shows a water intake pipe when an upward force is made to act on a tension cord. It is a side view which shows the operation | work which attaches a water intake pipe to a ship's bottom. It is a longitudinal cross-sectional view which shows the other example of the intake pipe in embodiment of this invention. It is the side view and transverse plane figure which show the other example of the intake pipe in embodiment of this invention. It is the side view, top view, and vertical side view which show the other example of the intake pipe in embodiment of this invention.

FIG. 1 is a diagram showing a state in which a water intake device according to an embodiment of the present invention is provided on a hull 1 that is a floating body on the ocean. L indicates the sea level. The hull 1 is provided with a tank 12 for storing seawater so as to surround the periphery of the main body 11. Between the upper deck 13 of the hull 1 and the tank 12, two

decks

14 and 15 are provided on the upper and lower sides. These

decks

14 and 15 are an example of a structure for performing an intake pipe installation operation, and the present invention does not necessarily require a two-stage deck. A suction pipe 21 having both ends connected to the left and

right tanks

12, 12 is provided at the bottom of the ship, and the branch pipe branched from the middle of the suction pipe 21 is connected to a pump P arranged in the main body 11. Has been. Valves V1 and V2 are provided on both sides of the suction pipe 21, and when at least one of these valves V1 and V2 is opened, the pump P is driven so that the seawater in the tank 12 becomes a predetermined region of the main body 11, for example, It will be supplied to a heat exchanger (not shown) in the FLNG.

From the bottom surface of the hull 11, for example, a water intake pipe 3 for pumping up deep ocean water having a depth of 200 to 300 m is suspended. The intake pipe 3 is constituted by connecting a plurality of pipe bodies 4 to each other, and the uppermost pipe body 4 is fixed to a bottom surface portion (ship bottom) 12a of the tank 12 as shown in FIG. 31 is a guide pipe made of steel, for example, and is provided from the bottom surface portion 12a to the deck 15 so as to surround the upper region of the water intake pipe 3 in the tank 12. The guide pipe 31 serves as a guide when performing the work of lowering the intake pipe 3 into the sea or the work of lifting it from the sea. A slit is formed in the guide pipe 31, and the deep ocean water pumped up through the intake pipe 3 flows out into the tank 12 through the slit of the guide pipe 31. It should be noted that the water in the surface layer portion temporarily flows into the tank 12 during the installation work or lifting work of the intake pipe 3, but this is not a problem.

As shown in FIG. 2, the flange 41 at the upper end of the uppermost tube 4 is pressed against the fixed ring 33 by the pressing mechanism 34 via the ring-shaped elastic member 32. At the peripheral edge of the flange 41, locked portions 41a each having an inclined upper surface are provided at intervals along the circumferential direction. The pressing mechanism 34 is hydraulically swiveled by a swiveling member 34a that horizontally swivels around a rotation shaft located at a position corresponding to the locked portion 41a, and its lower surface climbs along the slope of the locked portion 41a. The flange 41 is configured to press downward, and the surface water is prevented from flowing into the tank 21 from between the flange 41 and the bottom surface (ship bottom) 12a. Reference numeral 34b denotes a hydraulic pipe, which is pulled out from an area in the guide pipe 31 in a watertight manner. The pressing mechanism 34 constitutes a fixing portion that fixes the intake pipe 3 to the hull.

In this example, the uppermost tube body 4 in the tube body 4 group and the second and subsequent tube bodies 4 are different in shape and structure. The uppermost tube 4 is pressed by the pressing mechanism 34 and fixed to the ship bottom 12a. Accordingly, the uppermost tube body 4 is required to have a high strength, and it is necessary to ensure a watertight structure. For the second and subsequent pipe bodies 4, for example, polyethylene which is a material having a specific gravity close to that of seawater is used. The specific gravity of polyethylene may vary from 0.90 to 0.98 depending on the product, but the specific gravity may be adjusted by mixing other resins. For example, the specific gravity is smaller than the specific gravity of seawater and the specific gravity difference is within 0.05. Material is used.

The lowermost tube 4 is made of a cylindrical metal member having a narrowed lower end, a plurality of openings 42 are formed in the tube wall, and a weight of, for example, about 5 to 10 tons 50 is suspended. The tube 4 to which the heavy weight 50 is attached in this way is advantageous in that it has a high strength in consideration of the convenience of carrying on the sea, and is thus made of metal, for example. As for the suspension structure of the weight 50, as shown in FIG. 5, a support bar 43 is spanned along the transverse section of the tubular body 4 at the lower end portion of the lowermost tubular body 4, and suspended on the support bar 43. The weight 50 is suspended through the cable 51. The opening 42 formed in the lowermost tube 4 forms a water intake with the lower end opening of the tube 4.
As described above, the uppermost portion of the intake pipe 3 is formed of a metal body having the flange portion 41, and has a function of fixing the intake pipe 3 to the bottom surface portion 12a and preventing surface water from flowing into the tank 21. In addition, the lowermost portion of the intake pipe 3 has a function of suspending the weight 50 while forming an intake port. Therefore, the uppermost part and the lowermost part of the intake pipe 3 are different in function and structure from a so-called main body part, which will be described later, but these parts are also treated as “tubular body 4” in this specification and from the second stage to the lowermost part. In FIG. 2 and FIG. 3, the reference numerals “400” and “401” are assigned to distinguish the tubes arranged up to one stage.

The connecting structure of the tubular bodies 4 will be described in detail. Each tubular body 4 except for the uppermost tubular body 4 is coaxial with the tubular body 4 on the upper end surface of the tubular body 4 as shown in FIGS. A rubber sleeve 61, which is an elastic body, is fixed. The rubber sleeve 61 has, for example, a shape in which a central body portion swells outward, and a metallic attachment ring 62 is provided coaxially from the inner peripheral surface of the lower end portion to the lower side of the lower end portion. Yes. The attachment ring 62 includes an inner sleeve 62a fixed to the inner peripheral surface of the lower end portion of the rubber sleeve 61, and an outer sleeve 62b fixed to the outer peripheral surface of a portion of the inner sleeve 62a protruding downward from the rubber sleeve 61. And consist of A plurality of, for example, three U-shaped hooks 63 are provided on the outer peripheral surface of the outer sleeve 62b at equal intervals along the circumferential direction.

On the other hand, a U-shaped hook 64 is provided immediately below each of the hooks 63 on the outer peripheral surface of the lower end portion of the tube body 4. A ring portion at the upper end of the wire 65 is attached to the upper hook 63 via a shackle, and a ring portion at the lower end of the wire 65 is attached to the lower hook 64 via a shackle (not shown). ing. Such a connection structure cannot be welded to the mounting ring 62 made of metal and the hard polyethylene which is the material of the tube body 4, and thus can be said to be a structure for integrating these different materials. Thus, the rubber sleeve 61 and the pipe body 4 are connected, and the connection body of the rubber sleeve 61 and the pipe body 4 is a so-called split element (one unit) that divides the intake pipe 3 into a plurality of parts.
The rubber sleeve 61 constitutes a sleeve member that forms a part of the tube body 4 in this example. Therefore, the tube body 4 is composed of a rubber body mounted on the tube body portion and the end portion of the tube body portion. It can be said that it is composed of the sleeve 61. In this specification, there is a portion described as a separate component instead of one unit in which the rubber sleeve 61 and the pipe body 4 are connected.

For example, rubber sleeve 61 is provided in two stages for the second tubular body 4 from the top. Regarding the relationship between the tubular bodies 4 arranged one above the other, the upper tubular bodies 4 are placed on the upper end surface of the rubber sleeve 61 of the lower tubular body 4 instead of being connected to each other by a connector. There is only.

At the upper end of the tube 4 excluding the uppermost tube 4 and the lowermost tube 4, the position of a tension cord, which will be described later, is placed at the center of the tube 4 (the central axis and its vicinity) as shown in FIG. ) Is provided. As shown in a plan view in FIG. 6, the guide portion 44 has, for example, four support members 45 that are directed from the inner peripheral surface of the mounting ring 62 toward the central axis, and the center of the tube body 4 by the support members 45. And a guide ring 46 fixed to the portion. The number of support members 45 is not limited to four, and may be two, three, or five or more, for example. The guide portion 44 may be provided on the inner wall of the tube body 4. In the longitudinal sectional view of the guide ring 46, the drawing is performed without showing the edge line for convenience. The guide portion 44 corresponds to an example of a guide portion that guides the tension cord 5 in the claims.

A tension cable is passed through the tube body 44 from the uppermost tube body 4 to the lowermost tube body 4, and the upper end of the tension cable 5 is as shown in FIGS. 1 and 7. It is wound around a winding mechanism 71 provided with a deck 15 in the hull 1. This is described in detail in FIG. The deck 15 is formed with an opening 16 that is used when the intake pipe 3 is installed. A swing hanger mechanism 72 is provided so as to straddle the opening 16, and the swing hanger mechanism 72 and the winding mechanism 71 are also provided. Between them, a guide sleeve 73 whose central axis is oriented in the horizontal direction is provided on the deck 15 via a column 73a. The tension cord 5 passes through the opening 16 and is hooked on a roller portion (not visible in the drawing) at the center of the swing arm of the swing hanger mechanism 72, and further passes through the guide sleeve 73 and is wound on the winding mechanism 71. It has been.

The lower end portion of the tension cord 5 is attached to a support bar 47 that is spanned in the diameter direction in the lowermost tube body 4. The tension cord 5 is constituted by a chain in this example. Although the lower end of the tension cord 5 and the support bar 47 are abbreviated in FIG. 5, for example, the tip of the chain and the support bar 47 are connected by a shackle. The hoisting mechanism 71 constantly generates torque so as to pull up the tension cord 5, so that the lowermost tube body 4 tends to be pulled up. On the other hand, since the tube 4 of the uppermost portion 4 is fixed to the bottom surface portion 12 a of the hull 1, a compressive force acts on the tube 4 group, that is, the intake pipe 3 in the length direction. As described above, the upper and lower

tubular bodies

4 and 4 are merely placed on the rubber sleeve 61 of the lower tubular body 4 with respect to the upper and lower adjacent

tubular bodies

4 and 4. The upper end of the rubber sleeve 61 and the lower end of the tubular body 4 are pressed against each other against the restoring force of the rubber sleeve 61 and the elastic ring 62, and the two are pressed. In this example, the hoisting mechanism 71 forms a tension cord holding portion that applies an upward pulling force to the tension cord.

As shown in FIG. 4, the tension cord 5 can be separated corresponding to each tubular body 4 (for each tubular body 4). The tension cords 5 separated corresponding to each tubular body 4 are connected by using, for example, a connection ring and a shackle at the tip of the tension cord. If the tension cord corresponding to each tubular body 4 is referred to as a tension cord element for convenience (the symbol is assigned the same sign “5” as the tension cord), each tension cord element 5 has a larger clearance than the inner diameter of the guide ring 46. A stop member 54 is disposed. For this reason, when the upper end of the tension cord element 5 is lifted, the retaining member 54 cannot be passed through the guide ring 46 and is locked at that portion. The body 4 can also be lifted. In FIG. 4, the upper end of the tension cord element 5 is drawn with a dimension D higher than the upper end of the rubber ring 61, but the length of the tension cord element 5 is from the upper end of the rubber ring 61. The length to the lower end of the tubular body 4, that is, the same length as the division unit of the intake pipe 3 is set.

Such an intake pipe 3 can be installed as follows. FIG. 9 shows a state in which the intake pipe 3 is installed. Several pipe bodies 4 are already connected and are located in the guide pipe 31 in the tank 12 and in the sea. A new tube 4 is being connected to the tube 4 group. For the convenience of explanation, the reference numeral “4A” is assigned to the uppermost tube body in the group of tube bodies 4 that are already connected and constitute a part of the intake pipe 3, and is about to be connected on the tube body 4A. A code “4B” is assigned to the pipe body. The upper end of the tubular body 4A is positioned so as to face the opening of the deck 15, and the upper portion of the tension cord (tensile cord element) 5 paired with the tubular body 4A is the swing hanger mechanism described in FIG. 72 is hooked to a hook 72a. Specifically, a ring portion located at a position slightly apart from the upper end of the chain constituting the tension cord 5 is hung on the hook 72a so that the ring portion is not detached by a kanuki (not shown).

In this state, the pipe body 4B is lowered from above the pipe body 4A by a hoist 75 with a hull. With the tube body 4B lowered to a sufficiently close position to the tube body 4A, the tube body lifting mechanism 74 provided on the deck 14 lifts only the outside of the tube body, so that the tension that is paired with the tube body 4B is obtained. The lower end of the cord is exposed to the lower side of the tube 4b.

Then, the connection ring 52 at the upper end of the tension cord 5 in the lower tube 4A is locked by, for example, a shackle on the connection ring 53 at the lower end of the tension cord 5 protruding from the lower end side of the tube 4B. The tension cord 5 is pulled off from the hook 72a of the swing hanger mechanism 72, and finally the outside of the tube 4B is pulled down by the tube lifting mechanism 74.

Seawater has entered the guide pipe 31, and the pipe body 4 is mounted with metal parts, but the overall specific gravity is close to seawater. Therefore, the tension cord 5 in the pipe body 4A is removed from the hook 72a. Sometimes a large impact force is not applied to the tension cord 5. Then, the hoist 75 with the hull lowers the pipe body 4B to a height level that is placed on the rubber sleeve 61 on the pipe body 4A. When the specific gravity of the tubular body 4 is larger than seawater due to the mounting of metal parts, the tubular body 4 is lowered by its own weight including the metal parts, and the specific gravity of the tubular body 4 including the metal parts is smaller than seawater. Sometimes, the tension line 5 is lowered by the weight 50 provided on the lower end side of the tension line 5.

Then, the chain ring portion slightly below the upper end of the tension cord 5 corresponding to the tube 4B is locked to the swing hanger mechanism 72, and thereafter the tube 4 is connected in the same manner. After the uppermost tubular body 4 is connected, the tension cable 5 is lowered and the flange 41 of the tubular body 4 is brought into contact with the elastic member 32 described above on the ship bottom 12a as shown in FIG. Later, the pressing mechanism 34 is pressed and fixed as described above. In FIG. 9, reference numeral 17 denotes a pipe carrier, on which the pipe 4 is arranged, and the pipe 4 is carried from the work boat 17 by a crane (eg, hoist) (not shown) provided in the hull 1. Intake pipes are installed. Surface water temporarily flows into the hull 1 during the installation work of the intake pipe, but this is not a problem because it is replaced with deep sea water as soon as the operation is started.

When the intake pipe 3 is installed, deep ocean water flows into the tank 12 from the intake port 42 at the lower end of the intake pipe 3 through the intake pipe 3 to be filled. When deep sea water accumulates in the tank 12, the valves V 1 and V 2 are opened and the pump P is driven to draw deep sea water into the use area through the suction pipe 21. After that, deep ocean water is continuously pumped up through the intake pipe 3 by the principle of siphon. In the case of pulling up the intake pipe 3, a reverse procedure may be performed for the above-described installation work.

Of the tube body 4 group constituting the intake pipe 3, the uppermost tube body 4 (the tube body 4 provided with the flange portion 41) and the lowermost tube body 4 (the tube body 4 provided with the intake port 42) are made of materials. Is a metal, but the specific gravity of the material of the other tubular body 4 is preferably 0.88 to 2.2. If this specific gravity is too small, the buoyancy will be too large and difficult to handle. Conversely, if the specific gravity is too large, the tension applied to the tension cord 5 will be too large, and it will be necessary to use a large tension cord. The advantage is reduced in terms of work and equipment. Examples of the material include glass fiber reinforced plastic (specific gravity 2.0), carbon reinforced plastic (specific gravity 1.7), vinyl chloride (specific gravity 1.43) and the like in addition to polyethylene. Since the specific gravity of aluminum is 2.7, ordinary metals are not included in the above specific gravity range.

According to the above-described embodiment, the intake pipe 3 is configured by arranging a plurality of pipe bodies 4 in the length direction. The tension cable 5 extending along the tube body 4 is used to generate a winding torque in the winding mechanism 71 in a state where the intake pipe 3 is fixed to the hull so that an upward pulling force is applied to the tension cable 5. An upward force is applied to the lower tubular body 4. For this reason, the tube body 4 group is pushed up from the lower side and is pressed against the hull 1 side, and the vertical posture with respect to the water flow is not easily lost, and the intake pipe 3 itself that is an aggregate of the tube bodies 4 is straight. By having a restoring force, the resistance of the fluid due to the internal water flow can be reduced, and the tip can easily reach the intended water depth. Moreover, since the pipe bodies 4 are press-contacted with each other, even if the pipe bodies 4 are not physically connected, the seams between the pipe bodies 4 can be watertight to some extent, and seawater that is shallower than the planned water depth flows in. Can be suppressed.

Since the weight of the intake pipe 3 is added to the tension measure 5 due to the structure, the intake pipe 3 loses its own weight, that is, the fatigue caused by the weight of each pipe body 4, and as a result, the material of the intake pipe 3 has a low strength. Can also be used, reducing material strength constraints. In addition, since a light material such as polyethylene is used as the material of the tube body 4, the winding torque of the tension measure 5 and the force acting on the swing hanger mechanism 72 are used when a metal such as a steel pipe is used as the tube body 4. Compared to this, it is possible to use a winding mechanism 71 having a small capacity, and the tension measure 5 can be reduced in fatigue, so that it is easy to design a device having a long service life.

Further, when installing the intake pipe 3, it can be performed by a simple operation of sequentially connecting the pipe bodies 4 and lowering them into the sea as described above. Further, in this example, the pipe bodies 4 are connected to each other by connecting members. Installation work can be easily performed because the work of using and connecting is unnecessary. Further, modification work such as addition of the pipe body 4 or maintenance work can be easily performed, and the degree of freedom in layout of the hull is great. Furthermore, since the intake pipe 3 is not a single thing, transportation of equipment is easy.

The modifications of the present invention are listed below. The tubular bodies 4 may be connected to each other by a connecting rope 67 as shown in FIG. In this example, a hook 63 provided at the lower end portion of the upper tubular body 4 and a hook 64 provided at the upper end portion of the lower tubular body 4 are connected by a connecting rope 67. It is provided at two locations in the circumferential direction of the body 4.

Further, the tension measure 5 is not limited to the configuration divided corresponding to each tubular body 4, and one tension measure 5 may be provided for the entire intake pipe 3. In this case, the intake pipe 3 is installed by sequentially connecting the pipe bodies 4 and lowering them into the sea, and then pulling the tension cable 5 from above the uppermost pipe body 4 into the pipe body 4 group, This can be done by hooking the hook at the lower end of the tension cord 5 to a bar provided in advance in the tube body 4.

The tension cable 5 may be passed outside the tube body 4 instead of passing through the tube body 4. FIG. 11 shows such an example. An arcuate guide portion 47 is provided on the outer peripheral surface of the tube body 4 at a position that bisects the outer periphery of the tube body 4, for example. Are provided on each tube body 4 so as to be separated from each other vertically. The tension cables 5 are passed through regions surrounded by the guide portions 47 and the outer peripheral surface of the tube body 4, and the lower end portions of the tension cables 5 are, for example, locking portions 48 provided on the outer peripheral surface of the lowermost tube body 4. Is locked and fixed. In this case, the upper ends of the two tension cables 5 are respectively wound up by two winding mechanisms. In addition, although it is not necessary to interpose an elastic body between the

pipe bodies

4 and 4 adjacent to each other up and down, it is preferable to interpose an elastic body in that an excessive force is not applied to the pipe body 4.

The tension cord 5 is provided so that an upward force is applied to the lowermost tube body 4 by being pulled upward. To obtain this effect, the lower end of the tension cord 5 is provided at the lower end 4. For example, a weight 50 larger than the diameter of the lowermost tube body 4 is connected to the lower side of the lowermost tube body 4, and the weight 50 is not limited thereto. The lower end of the tension cord 5 is connected to the upper end of the tension cord 5 and the tension cord 5 is pulled up, whereby the weight 50 pushes up the lowermost tube body 4 so that an upward force is applied to the lowermost tube body 4. .

In the present invention, the tension rope holding portion is not limited to the hoisting mechanism 71. For example, the upper end of the tension rope 5 is fixed to a not-shown portion of the hull, and the tension rope 5 between the fixing point and the swing hanger mechanism 72 is fixed. A mechanism that lifts upward may be provided. The present invention is not limited to deep ocean water, but may be applied when pumping lake water.

Furthermore, the present invention may have a structure in which the tubular bodies 4 are connected to each other by a connecting member, the lower end of the tension line 5 is attached to the weight 50, and the upper end side of the tension line 5 is fixed to the hull 1. As a connection member, it can be set as the structure using the cable 67 and the

hooks

63 and 64 as shown, for example in FIG. Examples of fixing the upper end side of the tension cable 5 to the hull 1 include a case where the hoisting torque of the hoisting mechanism is not generated. In such a water intake device, an upward pulling force does not act on the tension cord 5, so that the action of pressing the tubular bodies 4 against each other does not work. For this reason, the tension cord may be referred to as a simple “string”, but it will be referred to as a tension cord because the structure can be easily understood in comparison with the embodiment described above. In such an invention, since the intake pipe 3 is divided, installation work and maintenance become easy, and the vertical posture of the intake pipe 3 is not easily collapsed due to the presence of the tension cord 5. Further, since the load of the weight 50 is borne by the tension cable 5, when the specific gravity of the portion of the intake pipe 3 excluding the uppermost tube 4 is larger than seawater, the load of the weight 50 is applied to the intake pipe 3. Since it does not add, it is advantageous at the point which suppresses the fatigue degree of the intake pipe 3. FIG.

In the above, in the embodiment shown in FIGS. 1 to 6, the lower end portion of the tube body 4 is constituted by the rubber sleeve 61 that is a sleeve member, but the sleeve member is a flat cylindrical body made of, for example, metal (hereinafter referred to as the sleeve member). A metal ring 8) may be used. 12 shows an embodiment using the metal ring 8, FIG. 12 (a) is a side view of the metal ring 8, FIG. 12 (b) is a plan view of the metal ring 8, and FIG. 12 (c) is this metal ring. It is a vertical side view explaining embodiment using 8. FIG. On the outer peripheral surface of the metal ring 8, for example, a hook 82, which is a locking member, is provided so as to have a symmetrical positional relationship across the central axis of the metal ring 8. A state in which the metal ring 8 is fixed to the lower portion of the tubular body 4a by applying a wire 65a between the hook 82 and the hook 64a of the main body portion of the tubular body 4a to give the wire 65a some tension. It has become. A guide ring 46 a that is coaxial with the metal ring 8 and smaller in diameter than the metal ring 8 is attached to the lower side of the metal ring 8 via a support member 83. The support member 83 is configured such that one end side thereof is fixed to the inner peripheral portion of the metal ring 8, protrudes downward from the metal ring 8, and further its distal end side is bent toward the inside of the metal ring 8. The outer peripheral surface of the portion projecting downward from the support member 83 has a size suitable for the inner diameter of the tubular body 4 a below the metal ring 8. Therefore, the tubular body 4a can be fitted to the metal ring 8 from below. The connecting portion between the tube body 4a and the metal ring 8 is covered with water tight so as to be surrounded from the outside of the tube body 4a by, for example, an elastic bellows body 84, and external water is introduced into the intake pipe 3a from the connecting portion. It is configured not to be submerged. In addition, about what has the same function as the above-mentioned embodiment, the description was abbreviate | omitted and the "a" was attached | subjected to the code | symbol.

According to such an embodiment, since the upper tube body 4a and the lower tube body 4a are connected in a shallowly fitted state, it is possible to bend while maintaining the posture in the length direction. . Therefore, the intake pipe 3a is excellent in durability because it can reduce the bending moment acting on the pipe material of the intake pipe due to the swinging or tidal current of the floating body, and the entire intake pipe 3a can suppress the amount of expansion and contraction. The ability to maintain the water tightness of the part can be enhanced.

The sleeve member 8 is not limited to metal and may be, for example, a lightweight carbon reinforced plastic. In this embodiment, the sleeve member 8 is mounted on the lower end of the tube body 4a. However, the sleeve member 8 may be provided on both ends of the tube body 4a. In this embodiment, the fitting structure is formed by the support member 83 fixed to the inner peripheral surface of the sleeve member 8, but the fitting structure may be adopted without the sleeve member 8. This sleeve member 8 may adopt only a fitting structure without using the guide ring 46a which is a guide portion.

In the above, the water intake apparatus of the present invention is not limited to pumping deep sea water for FLNG, but for example, adjusting the temperature of deep sea water to adjust the temperature of seawater in the ginger to promote the growth of marine products. It can also be applied when used. Further, the present invention is not limited to pumping deep ocean water but can be applied to pumping lake water.

DESCRIPTION OF SYMBOLS 1 Hull 12

Tank

14, 15 Deck 3 Intake pipe 31 Guide pipe 34 Pressing mechanism 4 Tube 42 Intake port 44 Guide part 5 Tension line 50 Weight 61 Rubber sleeve 62, 66 Elastic ring 71 Winding mechanism 72 Swing hanger mechanism 8 Metal ring ( Sleeve member)
84 Bellows body

Claims

In an apparatus for taking water by a water intake pipe provided on a floating body on the ocean or lake and extending downward,
A plurality of pipes that are arranged in the lengthwise direction to form a water intake pipe;
A fixing portion for fixing the uppermost tube of these tubes to the floating body;
A water intake provided in a lowermost tube of the plurality of tubes;
A tension cord provided so that an upward force is applied to the lowermost tubular body by extending along the tubular body from the floating body side and being pulled upward.
Tension that is provided on the floating body and that applies a tensile force to the tension cable in a state where the intake pipe is fixed to the floating body in order to apply a compressive force in the length direction to the intake pipe. A water intake device comprising a rope holding portion.
2. The water intake device according to claim 1, wherein the specific gravity of the material of at least the uppermost tubular body and the tubular body other than the lowermost tubular body is 0.88 to 2.2.
The water intake device according to claim 1, wherein the pipe bodies adjacent to each other vertically are fitted to each other.
The water intake device according to claim 1, wherein the tension cable is passed through a tubular body.
The water intake device according to claim 4, wherein a guide portion for guiding the tension cord to a central portion of the tube body is provided in the tube body.
At least one of the upper end portion and the lower end portion of the tubular body is configured by a sleeve member attached to the main body portion of the tubular body,
The water intake device according to claim 5, wherein the guide portion is provided on the sleeve member.
6. The water intake device according to claim 5, wherein one of the pipe bodies adjacent to each other in the vertical direction is fitted to the other pipe body via the guide portion.
The water intake device according to claim 1, wherein a connecting portion between the tubular bodies is watertightly surrounded by a bellows body that is extendable and contractible in a length direction of the tubular bodies.
The water intake device according to claim 1, wherein the tension cable is configured to be divided for each tubular body.
The water intake apparatus according to claim 1, wherein a weight is provided on the lowermost tube body.
In an apparatus for taking water by a water intake pipe provided on a floating body on the ocean or lake and extending downward,
A plurality of pipes that are arranged in the lengthwise direction to form a water intake pipe;
A connecting member for connecting these pipes to each other;
A fixing portion for fixing the uppermost tube of the plurality of tubes to the floating body;
A water intake provided in a lowermost tube of the plurality of tubes;
An upper end side is fixed to the floating body side, and a cord passing through the inside of the plurality of tubes,
A weight suspended from the lower end of the rope;
A water intake device, comprising: a guide portion that is provided on the tubular body and guides the rope.
12. The water intake device according to claim 11, wherein the weight is provided on a lower side of the lowermost tube body.
The water intake device according to claim 11, wherein the guide portion is provided so as to guide the rope at a central portion of the tubular body.