JPS60240594A - Device for coupling tension member to anchor at bottom of water - Google Patents

Abstract

PURPOSE:To simply attach and detach a tension member, by providing a tension member penetration hole and a socket engaging portion at the upper end of a tension member coupling device and a tension member passage slit and socket attachment/detachment openings in the front of the device, and providing guide members at the openings. CONSTITUTION:A socket engaging portion 4 having a tension member penetration hole 3 is provided at the upper end of a vertical tube 2, which serves as a member for engaging a tension member 5 and is secured at the bottom to an anchor 1 at the bottom of water. An opening 7 for inserting a socket 6 provided at the lower end of the tension member 5 and an opening 11 for separating the socket are provided in the front of the tube 2. A tension member passage slit 8 is provided so that it extends from the penetration hole 3 to the lower opening 11. Oblique guide members 13, 14 for guiding the socket 5 are provided so that the guide members are oriented to the openings 7, 11. As a result, the tension member 5 and the socket 6 can be simply attached and detached.

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention has the following features: 1. The present invention relates to a device for connecting a tension member such as a tension member to an underwater anchor in a tension leg mooring type floating structure used for submarine oil production equipment, submarine natural gas production equipment, or other marine equipment.

[Prior art]

Conventionally, a device for connecting a tension member such as a tension member in a tension leg moored marine floating structure to an underwater anchor was proposed in Japanese Patent Application No. 58-80045 filed by the present applicant. In the case of the connection device according to this proposal, the socket connected to the lower end of the tension leg, that is, the tension member, is held by the attachment/detachment device and pushed down toward the bottom anchor directly below the floating structure, and the socket is attached to the bottom anchor. A locking device having a mechanically movable part locks the socket by mechanical action.

However, in the case of the above-mentioned conventional connection device, (1) a locking device with a mechanically movable part is installed on the underwater anchor side, so the locking device installed at the bottom of water at a depth where the dipper cannot dive is (2) If the locking device is left at the bottom of the water for a long time, the movable parts of the locking device may become corroded or have microorganisms attached to them. (3) The structure of the locking device is complicated and expensive, and it is also heavy. .

[Purpose and structure of the invention]

It is an object of the present invention to provide a device for connecting a tension member to an underwater anchor, which can advantageously solve the above-mentioned problems. A socket locking part 4 having a tension member insertion hole 6 is provided at the upper end of the vertical sheath body 2, and the socket 6 at the lower end of the tension member 5 is inserted into the front part of the vertical sheath body 2. A socket insertion opening 7 and a tension member passage slit 8 extending from the upper edge of the opening 7 to the tension member insertion hole 6 are provided. The apparatus for connecting a tension member to a underwater anchor is characterized in that a socket insertion guide member 9 expanding from the bottom to the top is fixed at a position facing the bottom anchor.

〔Example〕

Next, the present invention will be explained in detail using illustrated examples.

The drawing shows an embodiment of the present invention, in which a concrete or steel anchor 1 installed in underwater ground 10 is shown.
is fixed by a pile (not shown) driven into the underwater ground 10, and the anchor 1 has a tubular steel vertical sheath 2.
A truncated conical socket locking part 4 having a tension member insertion hole 6 is formed at the upper end of the vertical sheath body 2, and a tension member is fixed at the front part of the vertical sheath body 2. an opening 7 for inserting the socket 6 at the lower end of the
a vertical tensile member passage slit 8 extending from the upper part of the tension member insertion hole 6 to the tension member insertion hole 6; a socket escape opening 11 located below the opening 7; A tension member passage slit 12 is provided on the front outer surface of the vertical sheath body 2, and a socket insertion slit is provided on the front outer surface of the vertical sheath body 2 at a position opposite to the socket insertion opening 7, expanding from the bottom to the top. A guide member 9 is fixed by welding, and a vertical tension member passing slit 16 is provided in the guide member 9, and each slin) 8, 12
．． ．． 13 are arranged on the same vertical plane.

Inside the vertical sheath body 2, a socket escape guide member 14 is arranged at a position facing the socket escape opening 11. 2. Fixed by welding etc.
A lower end portion or a lower end side portion of the guide member 14 is disposed at the lower edge of the socket escape opening 11.

When connecting a tension member such as a tension membrane in a tension leg moored floating structure to an anchor on the bottom of the water, the tension member 5 is let out from the winch of the floating structure, and the socket 6 at the lower end of the tension member 5 is connected to the attachment/detachment device. It is lowered toward the inside of the socket insertion guide member 9 at .

As shown in FIG. 3, when the tension member 5 is further extended after the socket 6 hits the inner surface of the guide member 9, the socket 6 is guided by the guide member 9, as shown in FIG. 434. While being inserted into the vertical sheath body 2, the lower part of the tension member 5 is inserted into the tension member passage slit 8.
It is inserted into the vertical sheath body 2 from the inside. Next, the tension member 5 is raised by the winch, and as shown in FIG. 5, the socket 6 is engaged with the socket locking portion 4, thereby completing the connection of the tension member 5. In this state, the socket 6 at the lower end of the tension member 5 is attached to the vertical sheath 2 fixed to the anchor 1.
It is locked to prevent it from moving laterally and upwardly.

When removing the tension member 5 from the anchor 1, as shown in FIG. 6, the winch lowers the tension member 5, and as shown in FIG. 14, the vertical sheath body is guided by the guide member 14 from the opening 11,
At the same time, the tension member 5 also passes through the slit 8,
12 to the outside of the vertical sheath body 2.

Next, when the tension member 5 is moved upward by the winch, the socket 6 hits the inclined lower surface of the socket insertion guide member 9, and then moves diagonally upward along the inclined lower surface, as shown in FIG. , and comes off from the guide member 9.

When carrying out this invention, the cross-sectional shape of the vertical sheath body 2 may be circular, rectangular or other polygonal, and the tension member 5 may be made of a beam member such as a parallel wire cable, a wire rope, or a steel pipe. Any rigid member may be used. Furthermore, if there is no need to remove the tension member from the anchor, the socket escape opening 11. The guide member 14 for socket escape and the slits 12, 13 exclusively for escape may be omitted.

〔Effect of the invention〕

According to this invention, by simply lowering the tension member 5, allowing the socket 6 at the lower end of the tension member 5 to enter the socket insertion guide member 9, and then further lowering the tension member 5, The socket 6 can be guided by the guide member 9 to be automatically inserted into the vertical sheath body 2, and the lower part of the tension member 5 can be automatically inserted into the vertical sheath body 2 through the tension member passage slit 8. , then tension member 5
By performing a simple operation of raising the socket 6 and engaging the socket locking part 4 at the upper end of the vertical sheath body 2, the tension member can be easily and quickly connected to the anchor 1. Furthermore, after the socket 6 is inserted into the vertical sheath body 2 and until tension is introduced into the tension member 5, the vertical sheath body 2 does not restrain the vertical movement of the socket B due to the movement of the floating structure, so the tension member 5 If a rigid member such as a steel pipe is used as the tension member, damage due to buckling of the tension member can be prevented, and the socket 6 can be placed within a certain range during connection.
Since it is only necessary to suspend the socket 6, there is no need to guide the socket 6 using a pre-stretched guideline or the like when lowering it, or to perform precise control when suspending and lowering the socket using other control devices. Since the device has no mechanically movable parts, it can be connected without any problems even after being left at the bottom of the water for a long time, and the connecting device can be made smaller, lighter, and cheaper. It will be done.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a detachable connection device according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional side view of the detachable connection device. Third
5 through 5 are longitudinal sectional side views showing the sequence of operations when connecting tension members, and FIGS. 6 through 8 are longitudinal sectional side views showing the sequence of operations when separating the tension members. In the figure, 1 is an anchor, 2 is a vertical sheath body, 6 is a tension member insertion hole, 4 is a socket locking part, 5 is a tension member, 6 is a socket, 7 is an opening for socket insertion, and 8 is for tension member passage. A slit, 9 is a guide member for socket insertion, 10 is the underwater ground, 11 is an opening for socket escape, 12 and 1 are slits for passing the tension member, and 14 is a guide member for socket escape. Figure 3

Claims (1)

[Claims] A socket locking part 4 having a tension member insertion hole 3 is provided at the upper end of the vertical sheath body 2 whose lower part is fixed to the anchor 1 at the bottom of the water. A socket insertion opening 7 into which the socket 6 is inserted at the lower end of the socket, and a tension member passing slit 8 extending from the upper side of the opening 7 to the tension member insertion hole 6 are provided. In the position facing the opening 7,
A device for connecting a tension member to a underwater anchor, characterized in that a guide member 9 for socket insertion that expands from the bottom to the top is fixed.