JP2902147B2 - Freestanding conduit system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a free standing conduit system.

[0002]

2. Description of the Related Art An ocean thermal energy conversion system utilizing cold deep water requires a conduit suspended in seawater to pump deep water. 2 and 3 show a conventional conduit system. In both figures, a riser pipe 01 suspended from a marine power generation barge 02 has an opening lower end portion 03 at a predetermined depth and is used for pumping deep water by a pump 04 on the barge. At the upper end of the riser tube 01, a compensator 05 is provided so as not to directly transmit the vertical swing of the barge 02. FIG.
The upper end of the riser tube 01 is hung by a tension wire 06, and the tension wire 06 is connected to a structure 09 on the barge through upper and lower pulleys 07 and 07 having a gap. . Pulley 0
7 is supported by a spring 08, and the vertical distance between the pulleys 07 is changed by the expansion and contraction of the spring, so that a relative vertical movement is absorbed between the upper end of the riser tube 01 and the barge 02, and the riser tube 01 This prevents excessive tension from occurring.

[0003]

However, there is a limit to the amount of displacement that can be absorbed by the above-described compensator. That is, the upper limit is twice the total allowable deformation amount of the spring applied to one tension wire. Therefore, the operable marine conditions are set by the wave fluctuation characteristics of the barge and the absorbable displacement of the compensator, and the operability is low in a rough sea area. In addition, when the water depth becomes large, there is a problem in that the descending and storing operation of the riser pipe requires a lot of time and labor. The present invention has been proposed in view of such circumstances,
To provide a self-contained pipe system that, in operation, significantly increases the allowable amount of vertical movement between a vertical pipe as a riser pipe and a floating body as a barge , and does not need to store the vertical pipe even in stormy weather. The purpose is to:

[0004]

SUMMARY OF THE INVENTION Therefore , the self-standing type of the present invention is provided.
Conduit system includes a vertically elongated column-type buoy floats in a standing posture so as to penetrate the sea surface, one end of which is pivotally connected to an upper portion of the buoy and the other end is pivotally connected to the floating body floated on the same sea link, defeated suspension before mounted on Chivu Lee in water and a vertical conduit having an opening at the lower end, a flexible tube for connecting the onboard equipment to the floating body and the top of該鉛straight conduit
In order to reduce the buoyancy of the buoy in waves
Lower end of the vertical conduit to prevent buckling of the vertical conduit
A weight is attached to the
When the buoyancy of the buoy decreases due to the passage of the valley
It is characterized in that it is set to a size that can leave tension on the tube .

[0005] According to such a configuration, first, in the operating state, the vertical movement of the barge is absorbed by the inclination of the link. Therefore, by increasing the length of the link as needed, the vertical length of the riser pipe is reduced. Upper end of conduit and barge
The allowable amount of the vertical movement relative to the floating body can be set large. Also, in a stormy weather , like a barge
The floating body can be easily evacuated only by separating the buoy. At that time, the buoy stands by itself with the vertical conduit suspended and stormy, but due to the large inertial force of the vertical conduit and the weight, the buoy hardly swings up and down against waves, and the buoyancy acting on the buoy The fluctuation directly becomes the buoyancy fluctuation of the vertical conduit. Therefore, the smaller the buoy, the smaller the tension fluctuation acting on the vertical conduit . In order to riser pipe is not buckled under compressive forces, it must leave the tensile force in the vertical conduit when tension decreases as it passes through the buoy up to wave valley which the required water weight It is ensured by the weight with.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall side view of an embodiment in which the self-contained conduit system of the present invention is applied to an ocean thermal energy conversion device. In the figure, a riser pipe 1 as a vertical conduit having an opening lower end portion 3 at a predetermined depth in the sea and a weight 8 mounted directly above the opening lower end portion 3.
However , it is suspended by a vertically elongated buoy 6 of an upright cylindrical type penetrating the sea surface . The figure also shows the operating state of the device, in which a power generation barge 2 and a buoy 6 as floating bodies floating on the same sea surface.
Is connected via a link 7 to the upper part of the . Deep water is taken in from the lower end 3 of the opening by the pump 4 on the barge 2 , and is pumped through the riser pipe 1, the internal pipe of the buoy 6, and the flexible pipe 9. The riser pipe 1 is bent by the tidal current or ocean current, and the weight 8 has an effect of suppressing the amount. That is, the underwater weight of the weight 8 is
When the buoy 6's buoyancy decreases due to the passage of
It is set to a size that can leave tension on the user tube 1. In stormy weather, the power generation barge 2, the link 7, and the flexible tube 9 are separated from the buoy 6, and the buoy 6 stands on the water surface while suspending the riser tube 1 and below. And the power generation barge 2 is a port
You can evacuate to such places. In addition, an upright cylindrical buoy
In No. 6 , since the cross-sectional area is relatively small, the fluctuation of buoyancy is small, and there is an effect that the thickness of the riser tube 1 and the weight of the weight 8 do not need to be excessive. Although the present embodiment has exemplified the system for pumping deep water, the same applies to a system for supplying a fluid such as hot water from the sea. Although the barges are linked during operation, the present invention can be effectively implemented in the same manner for floating bodies other than the barges.

[0007]

As described above, according to the present invention, in the operating state of the device According to the present invention, since the more severe weather conditions are acceptable, it is possible to expect a high rate of operation in comparison with the prior art, whereas during heavy weather vertical The floating body can be quickly evacuated and evacuated without the need to store the conduit . Although the above is an example of an ocean temperature difference power generation device, the present invention has a wide application range such as being applicable to a system for putting liquefied CO ₂ into the deep sea for the purpose of preventing global warming. In essence, the present invention provides a vertically narrow surface that rises in an upright posture to penetrate the sea surface.
And long pillar type buoy, one end of which is pivotally connected to an upper portion of the buoy, and links the other end is pivotally connected to the floating body floated on the same sea, attached before Chivu Lee beat suspended in water, and it includes a vertical conduit having an opening at the lower end, and a flexible tube for connecting the onboard equipment to the floating body and the top of該鉛straight conduit, waves
The vertical conduit is used to reduce the buoyancy of the buoy during a storm
Weight is attached to the lower end of the vertical conduit to prevent
Underwater weight of the weight is
When the buoyancy of the buoy decreases, tension remains in the vertical conduit.
By set to a size capable of significantly increasing the allowable amount of relative vertical movement between the vertical conduit and floating in the operating state, unnecessary even vertical conduit housed in rough weather
In addition , the present invention is extremely useful in industry because it provides a self-contained conduit system that prevents buckling of the vertical conduit .

[Brief description of the drawings]

FIG. 1 is an overall side view of an embodiment in which a self-contained conduit system of the present invention is applied to ocean thermal energy conversion.

FIG. 2 is an overall side view showing a conventional deep water pumping system.

FIG. 3 is an enlarged view showing a compensator in the pumping system of FIG. 2;

[Explanation of symbols]

1 riser pipe (vertical conduit) 2 bar di (floating body) 3 opening the lower end 4 pump 6 buoy 7 link 8 heavy weight 9 the flexible tube 01 riser pipe (vertical conduit) 02 Power barge (float) 03 opening lower end 04 pump 05 Compensator 06 Tension wire 07 Pulley 08 Spring 09 Structure

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Claims (1)

(57) [Claims] 1. A vertically elongated pillar-shaped buoy that floats in an upright posture so as to penetrate the sea surface, one end of which is pivotally connected to an upper portion of the buoy, and the other end of which is pivotally connected to a floating body that floats on the same sea surface. and links are, defeated suspension before attached to the Kivu Lee in the water,
And a vertical conduit having an opening at the lower end, and a flexible tube for connecting the onboard equipment to the floating body and the top of該鉛straight conduit its
In addition, when the buoyancy of the buoy is reduced during waves,
To prevent buckling of the vertical conduit, place a weight on the lower end of the vertical conduit.
A weight is attached, and the weight of the weight underwater is the maximum wave valley.
When the buoyancy of the buoy decreases due to the passage of
Characterized in that it is set to a size that can leave tension,
Freestanding conduit system.