JP2925974B2 - Seawater intake pipe laying method and terminal mounting frame for seawater intake pipe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for laying a seawater intake pipe and a terminal mounting frame for the seawater intake pipe.

[0002]

2. Description of the Related Art Conventionally, a method of laying a seawater intake pipe used for taking seawater from the sea has been performed by the following method. That is, one end of the seawater intake pipe is unloaded, and the seawater intake pipe is gradually drawn out from the rear part of the boat while moving the barge from the land side to the offshore direction. Next, when the position of the barge reaches the position of the other end of the seawater intake pipe to be laid, the terminal of the seawater intake pipe is attached and fixed to the terminal mounting frame, and a wire is connected to the terminal mounting frame. Next, the wire is gradually drawn out, and the seawater intake pipe terminal and the terminal mounting frame are suspended from the sea. At this time, near the water surface, the terminal of the seawater intake pipe hangs almost directly below the rear part of the barge, but when it descends near the bottom of the sea, the seawater intake pipe is pulled horizontally.

[0003]

The above-described method of laying the seawater intake pipe has the following problems. That is, 1) As shown in FIG. 5A, when the terminal mounting frame 21 is in the sea near the sea surface, the seawater intake pipe 22 hangs at an almost vertical angle. At this time, in order to stabilize the landing position of the terminal mounting frame 21, since the bottom 21 a has a closed ring shape, the seawater intake pipe 22 contacts the outside of the bottom 21 a of the terminal mounting frame 21, An external force is applied to the seawater intake pipe 22, and the seawater intake pipe 22 may be damaged. 23 is a wire for suspending the terminal mounting frame 21 from the barge 24.

2) As shown in FIG. 5 (b), when the terminal mounting frame 21 is near the sea bottom, the seawater intake pipe 22 is pulled in the horizontal direction. At this time, the seawater intake pipe 2
Since the second terminal 22a is fixed to the attachment portion 21b of the terminal attachment frame 21, the axial shape of the seawater intake pipe 22 is extremely bent in the vicinity thereof.

3) To avoid the above extreme bending, FIG.
As shown in (c), the hanging part 21 of the terminal mounting frame 21
Moving c from point A (FIG. 5 (b)) to point B (FIG. 5 (c)) causes the following problem. That is, the terminal mounting frame 21
May fall to the seawater intake pipe 22 side (rotate to the left in FIG. 5C), or the terminal mounting frame 21 may be inclined due to the resistance of the seawater intake pipe 22. Furthermore, the portion where the inclined terminal mounting frame 21 first landed (C
5), the seawater intake pipe 22 is pulled, and tension is left on the seawater intake pipe 22. As described above, the terminal mounting frame 1 falls down at the time of landing, and the landing posture becomes unstable. Also, excessive bending or tension occurs in the seawater intake pipe 22, and the seawater intake pipe 2
2 is damaged.

[0006]

SUMMARY OF THE INVENTION The present invention provides a method for laying a seawater intake pipe and a terminal mounting frame for the seawater intake pipe which solve the above-mentioned problems. Attach the terminal mounting frame to the terminal, in the method of laying a seawater intake pipe submerged in the sea while suspending the terminal mounting frame from the sea, in the opening recess guiding the seawater intake pipe
And a plurality of support rods.
Attach one end to the bottom and support it
Consolidate the other end above the bottom to form a mounting
A terminal mounting frame is provided, and the terminal mounting frame is pivotally attached to the terminal of the seawater intake pipe underwater so that the terminal of the seawater intake pipe can swing in a vertical plane including the pipe axis. A method for laying a seawater intake pipe, characterized by being laid in a seawater.

According to a second aspect of the present invention, there is provided a terminal for attaching a terminal of a seawater intake pipe, comprising a bottom and a terminal for attaching a terminal of the seawater intake pipe disposed above the bottom via a support frame. The frame has an open recess for guiding the seawater intake pipe.
And a plurality of support rods, one of the support rods
To the bottom to support it and
The other end is gathered on the upper side of the bottom to form a mounting part,
The mounting portion is provided with a terminal including a pipe shaft at a terminal of the seawater intake pipe.
A terminal mounting frame for a seawater intake pipe, which is pivotally mounted so as to be swingable in a face .

[0008] Further, the invention according to claim 3 is based on claim 2.
In the terminal mounting frame of the seawater intake pipe according to the description, a straight line connecting the center of gravity of the terminal mounting frame and the mounting portion of the terminal passes through the inside of the opened concave portion, and straddles the concave portion perpendicular to the straight line on the deeper side than the straight line. A terminal mounting frame for a seawater intake pipe, wherein a stopper member is provided on the bottom so as to close the bottom.

[0009]

According to the first aspect of the present invention, in a method for laying a seawater intake pipe which is attached to a terminal of the seawater intake pipe and sunk into the sea while suspending the terminal attachment frame from the sea, the seawater intake pipe is guided. Bottom with an open recess to
A plurality of support rods, one end of which is
Attach it to the bottom and support it and attach the other end
Attachment that is formed on the upper part of the bottom part to form a mounting part
Since the terminal of the seawater intake pipe is pivotally mounted so that the terminal of the seawater intake pipe can swing in a vertical plane including the pipe axis, the pipe near the end of the seawater intake pipe during the sinking of the terminal mounting frame. The shape is not excessively deformed due to bending or the like as shown in FIG. 5 (b), and hangs in a natural form, thereby preventing breakage of the seawater intake pipe. In addition, when the terminal mounting frame is landed on the seabed, the seawater intake pipe is landed in a stable posture without tension.

[0010] According to the second aspect of the present invention, the terminal is attached.
A bottom having an open recess for guiding the seawater intake pipe to the frame;
A plurality of support rods, one end of which is
Attach it to the bottom and support it and attach the other end
Attach to the upper part of the bottom to form a mounting part,
The part of the seawater intake pipe swings in the vertical plane including its pipe axis.
Since the terminal is pivotally mounted so as to be movable, the terminal of the seawater intake pipe does not undergo deformation as shown in FIGS. , Its tube axis can be of any shape.

Further, in the invention according to claim 3, in the terminal mounting frame of the seawater intake pipe according to claim 2, a straight line connecting the center of gravity of the terminal mounting frame and the mounting portion of the terminal passes through the inside of the opened concave portion, and Since a stopper member is provided on the bottom portion so as to cover the concave portion so as to straddle the concave portion on the deeper side of the straight line on the far side with respect to the straight line, the terminal mounting frame is rotated with respect to the seawater intake pipe terminal while the terminal mounting frame is suspended in the sea. Can be prevented. Therefore, at the time of landing, the opened concave portion of the terminal mounting frame can be reliably directed to the land side. In this case, the seawater intake pipe terminal faces the land side, and the concave portion faces the opposite side to the land, and as a result, it is possible to prevent the end of the seawater intake pipe from being placed under the bottom of the terminal mounting frame. .

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings. FIGS. 1A and 1B are a plan view and a side view, respectively, of an embodiment of a terminal mounting frame of a seawater intake pipe used for carrying out a method of laying a seawater intake pipe according to the present invention. The terminal mounting frame 1 of this embodiment has a mounting portion 4 for a terminal 10a of a seawater intake pipe 10 disposed on a V-shaped bottom 2 via a support frame including three support rods 3. . FIGS. 2A and 2B each show the mounting portion 4.
2 is an exploded plan view and an exploded side view of FIG. The mounting portion 4 includes a mounting plate 5 and a cylindrical mounting tube 6.
The mounting plate 5 has a triangular shape, and is provided with a rectangular mounting portion 5a into which the mounting tube 6 is mounted. 5b
Is a groove for supporting the protruding pin 6a of the mounting tube 6. FIG. 3 is a side view showing a state in which the mounting portion 4 is assembled. The mounting tube 6 is inserted into the mounting portion 5a, the protruding pin 6a is fitted into the groove 5b, the holding plate 7 is put on the groove 5b, and the screw 8 is inserted. To hold the protruding pin 6a in the groove 5b so as to be rotatable around its own axis. The terminal 10a of the seawater intake pipe 10 is inserted into and fixed to the mounting pipe 6. Accordingly, the terminal 10a of the seawater intake pipe 10 is pivotally attached to the terminal mounting frame 1 so as to be swingable in a vertical plane including the pipe axis . As shown in FIG. 1, the mounting portion 4 is disposed on the bottom 2 with the support rod 3 so that the entrance of the built-in portion 5 a faces the opening of the V-shaped bottom 2.

In FIG. 1, a straight line connecting the center of gravity of the entire terminal mounting frame 1 and the terminal mounting portion 4 is designed to pass through the inside of the bottom 2 having a V-shaped concave portion. Also,
A straight pipe 9 serving as a stopper member is attached to the bottom portion 2 so as to cover the recess so as to straddle the concave portion perpendicularly to the straight line on the deeper side of the straight line. The mounting position of the pipe 9 is on the deeper side of the bottom 2 than the straight line.
In a state where the seawater intake pipe 10 passes through an opening side of the pipe 9 of the bottom part 2 provided with such a pipe 9, horizontal tension is applied to the seawater intake pipe 10 while the opening side of the bottom part 2 faces in the opposite direction to the land side. Suppose you worked. Then, the pipe 9 abuts on the seawater intake pipe 10 rising in a catenary curve shape, the straight line is inclined from the vertical direction, and the posture of the terminal mounting frame 1 becomes unstable. , The opening side of the bottom 2 is directed to the land side, and a stable posture is taken. In other words, at the time of landing, the opened concave portion of the bottom portion 2 can be surely directed to the land side.
Can be prevented from being placed under the bottom 2.

Using the terminal mounting frame 1, the seawater intake pipe 1
0 is laid as follows. 1) As shown in FIG. 4 (a), the terminal 10a of the seawater intake pipe 10 is fixed to the mounting pipe 6 and the mounting pipe 6 is mounted on a wire 11 suspended from the sea, for example, from a ship. Next, the terminal mounting frame 1 is suspended from the ship, and laying is started. In the initial stage of submerging the terminal mounting frame 1 in the sea, the seawater intake pipe 10 is suspended almost vertically without contacting the terminal mounting frame 1. At this time, the opening of the bottom portion 2 of the terminal mounting frame 1 may be in any direction. 2) When the terminal mounting frame 1 is further submerged in the sea,
As shown in (b), the seawater intake pipe 10 is pulled to the land side by tension. At this time, if the opening side of the bottom 2 of the terminal mounting frame 1 does not face the land side, as described above, the terminal mounting frame is used. 1 the pipe 9 abuts on the seawater intake pipe 10,
The terminal mounting frame 1 rotates, and the opening side of the bottom 2 faces the land side. In this case, the seawater intake pipe 10 does not come into contact with the bottom 2 of the terminal mounting frame 1 and the mounting pipe 6 smoothly rotates clockwise in FIG. 3) When the terminal mounting frame 1 is further lowered and settled on the seabed, the seawater intake pipe 10 is further inclined in the horizontal direction and protrudes outside the opening side of the bottom 2 as shown in FIG. Also in this case, the seawater intake pipe 10 smoothly curves from the mounting pipe 6 without contacting the bottom 2, and the terminal mounting frame 1 is landed on the bottom 2 and maintains a stable posture.

The present invention is not limited to the above embodiment,
The terminal mounting frame 1 may not be laid directly on the sea floor, but may be laid on the sea floor via a tower. Further, the shape of the bottom 2 of the terminal mounting frame 1 is not limited to the V-shape, and may have another shape such as a U-shape as long as the bottom 2 has an open recess for guiding the seawater intake pipe 10. Further, a stopper member for closing the opened concave portion of the bottom portion 2 is not limited to the pipe 9, and various rod-like bodies or the like may be attached.

[0016]

As described above, according to the first aspect of the present invention, the terminal mounting frame is attached to the terminal of the seawater intake pipe,
In the method of laying a seawater intake pipe sunk into the sea while suspending the terminal mounting frame from the sea, the seawater intake pipe is guided.
A bottom having an open recess and a plurality of support rods.
And attach one end of the support rod to the bottom.
And support the other end together at the top of the bottom
A terminal mounting frame formed with a mounting portion is provided.
The mounting frame is vertically connected to the end of the seawater intake pipe including the pipe axis.
At the terminal of the seawater intake pipe so that it can swing in the plane
Because it pivots and sinks in the sea, damage to the seawater intake pipe can be prevented, and when the terminal mounting frame touches the seabed,
There is an excellent effect that the seawater intake pipe can be landed in a stable posture without tension.

According to a second aspect of the present invention, there is provided a seawater intake pipe comprising a bottom portion and a mounting portion of a terminal of the seawater intake tube disposed above the bottom portion via a support frame above the bottom portion. An open recess that guides the seawater intake pipe in the terminal mounting frame
Comprising a bottom having a portion and a plurality of support rods, wherein the support rod
Attach one end to the bottom and support it
In both cases, the other end is concentrated on the upper side of the bottom to form the mounting part
The seam intake pipe end is connected to the pipe axis.
Because it is pivoted so that it can swing in the vertical plane including
When the terminal mounting frame is submerged in the sea, the seawater intake pipe can be prevented from contacting the terminal mounting frame and being damaged.

Further, according to the third aspect of the present invention, in the terminal mounting frame of the seawater intake pipe according to the second aspect, a straight line connecting the center of gravity of the terminal mounting frame and the mounting portion of the terminal passes through the inside of the open recess. Since a stopper member is provided on the bottom portion so as to cover the recess in a direction perpendicular to the straight line on the deeper side than the straight line, the terminal of the seawater intake pipe is prevented from being laid under the terminal mounting frame. There is an effect that can be.

[Brief description of the drawings]

FIGS. 1 (a) and 1 (b) are a plan view and a side view, respectively, of an embodiment of a terminal mounting frame of a seawater intake pipe according to the present invention.

FIGS. 2A and 2B are an exploded plan view and an exploded side view of a mounting portion of the terminal mounting frame, respectively.

FIG. 3 is an assembled side view of the mounting portion.

4 (a) to 4 (c) are explanatory views of a method for laying a seawater intake pipe according to the present invention.

5 (a) to 5 (c) are explanatory views showing a conventional seawater intake pipe laying method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Terminal mounting frame 2 Bottom part 3 Support rod 4 Mounting part 5 Mounting plate 5a Incorporation part 5b Groove 6 Mounting pipe 6a Protruding pin 7 Holding plate 8 Screw 9 Pipe 10 Seawater intake pipe 10a Terminal 11 Wire

Claims (3)

(57) [Claims] 1. A mounting terminal mounting frame to the terminal of the seawater intake pipe, in laying method seawater intake tube sinking into the sea while hanging the terminal mounting frame from sea draft seawater intake pipe
From the bottom with an open recess inside and a plurality of support rods
Attach one end of the support rod to the bottom
While supporting this, gather the other end above the bottom
A terminal mounting frame is formed by forming a mounting part
The end mounting frame, as the terminal of the seawater intake pipe becomes swingable in a vertical plane including the tube axis, the terminal of the seawater intake pipe
A method for laying a seawater intake pipe, wherein the seawater intake pipe is attached to a sea and settled in the sea. 2. A seawater intake pipe terminal mounting frame comprising a bottom part and a seawater intake pipe terminal mounting part disposed above the bottom part via a support frame above the bottom part , wherein
Such as a bottom with an open recess to guide and multiple support rods
Attach one end of the support rod to the bottom
To support it and combine the other end above the bottom
Forming a mounting portion, wherein the mounting portion is a seawater intake pipe.
Terminal can swing in the vertical plane including its tube axis
A terminal mounting frame for a seawater intake pipe, wherein the terminal mounting frame is pivotally mounted on the terminal. 3. The terminal mounting frame for a seawater intake pipe according to claim 2, wherein a straight line connecting the center of gravity of the terminal mounting frame and the terminal mounting portion passes through the inside of the opened concave portion, and the straight line is deeper than the straight line. A terminal mounting frame for a seawater intake pipe, wherein a stopper member is provided on the bottom portion so as to cover the recess so as to extend perpendicularly to the recess.