JPH0530231U - Floating tower - Google Patents

Abstract

(57) [Summary] [Purpose] A turret used to install marine surveying instruments, boring machines, etc., on the sea efficiently and easily without using a sea crane or the like. To be able to. [Structure] A turret main body 2 having a steel frame structure, a closed buoyancy adjusting tank 3 provided in the turret main body 2, and a floating / sinking operation mechanism 4 for supplying / discharging seawater ballast to / from the buoyancy adjusting tank 3.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a floating and sunk turret used when installing a marine surveying instrument or the like on the sea in a dredging work or the like.

[0002]

[Prior Art]

 Conventionally, when installing marine surveying instruments, etc., the turret for installing them is usually installed at a predetermined location by a marine crane.

That is, a turret is mounted on a work boat, transferred to a predetermined sea area, and then settled down on the sea floor by a sea crane or the like. When changing the installation location of the turret, the turret should be hoisted by a sea crane and collected on a work boat before performing the above-mentioned installation work.

[0004]

[Problems to be solved by the device]

 Therefore, there was a problem that the efficiency of turret installation and relocation work was extremely poor and the labor burden was heavy.

An object of the present invention is to solve such problems and to provide a floating sledge capable of efficiently and easily carrying out installation work or relocation work at sea.

[0006]

[Means for Solving the Problems]

 The float-sink turret of the present invention, which solves this problem, comprises, in particular, a turret body, a buoyancy adjustment tank provided on the turret body, and a float-sink operation mechanism for supplying and discharging seawater ballast to and from the buoyancy adjustment tank.

[0007]

[Operation] When a float / sink is installed, first, the seawater ballast in the buoyancy adjustment tank is replaced with air to increase the buoyancy, so that the float / sink is floated on the sea.

Then, the floating and slag turret in this state is towed to a destination by a work boat such as a tug boat.

When the float / sink arrives at the destination, seawater ballast is injected into the tank to eliminate the buoyancy of the tank.

When the buoyancy of the tank disappears, the floating slag sinks and settles on the seabed, and is installed at the destination.

In addition, when changing the installation location of the turret, first, the seawater ballast in the tank is discharged, the tank buoyancy is generated, and the floating and sinking turret is floated.

After that, the floating and sinking turret is towed to a predetermined place by a work boat such as a tugboat, and the above-mentioned installation work is performed.

In this way, the installation work and the transfer work of the turret can be performed efficiently and easily.

[0014]

【Example】

 Hereinafter, the configuration of the present invention will be specifically described based on the embodiments shown in FIGS.

As shown in FIG. 1, the float-sink turret 1 of this embodiment comprises a turret main body 2, a buoyancy adjusting tank 3, and a float-sink operation mechanism 4.

The turret main body 2 has a steel frame structure, and is composed of a base 2a having a downward spread shape and a survey tower 2b erected on the upper end thereof. The surveying instrument and the like are installed in the surveying tower section 2b.

The buoyancy adjusting tank 3 is a closed tank, and is installed in the upper portion of the base portion 2 a, which is the center of gravity of the turret body 2. The volume of the tank 3 is set according to the size of the turret main body 2 and the like, and when the tank 3 is filled with air A, the turret main body 2 stabilizes the survey tower 2b protruding to the sea. When the tank 3 is floated in the state (see FIG. 2) and the tank 3 is filled with seawater ballast W, the turret body 2 is settled in a stable state, and the base 2a is bottomed on the seabed B (FIG. 3). And see FIG. 4).

The floating / sinking operation mechanism 4 includes a water supply / drainage port 5 provided at the center of the lower surface of the tank 3, an air supply / exhaust pipe 6 a connected to the upper surface of the tank 3, and an air-operated valve provided at the water supply / drainage port 5. An injection / drainage valve 7 which is a tough valve, a compressor 9 mounted on a work boat 8 such as a tugboat, a compressed air supply pipe 6b connected to the compressor 9, and an exhaust gas branched and connected to the compressed air supply pipe 6b. An air supply valve 10 provided on a portion of the compressed air supply pipe 6b closer to the compressor 9 than a connection point of the exhaust pipe 6c, an exhaust valve 11 provided on the exhaust pipe 6c, and a pouring / draining valve 7 First opening operation air supply pipe 12a and first closing operation air supply pipe 13a connected to the opening operation part and the closing operation part of the second opening operation part connected to the compressor 9 via the switching valve 14. Air supply pipe 12b and first closed operation And an air supply pipe 13b for use. The air supply / exhaust pipe 6a and the first operation air supply pipes 12a, 13a are attached to the tower main body 2 with their pipe ends positioned at the upper portion of the surveying tower section 2b. The pipe 6b and the second operation air supply pipes 12b and 13b are detachably connected. Then, when the air supply valve 10 is opened and the exhaust valve 11 is closed to operate the compressor 9, compressed air is supplied into the tank 3, and the seawater ballast W in the tank 3 is supplied to the water supply / drain port. It is designed to be ejected downward from 5. Further, when the switching valve 14 is operated to supply compressed air from the opening operation air supply pipes 12a and 12b to the opening operation portion, the pouring / draining valve 7 is opened, and the compressed air is closed operation air supply pipe. When the water is supplied to the closing portion from 13a and 13b, the pouring / draining valve 7 is closed. The connection side portions of the supply pipes 6b, 12b, 13b are made of flexible pipes.

In order to install the floating and turret 1 configured as described above, first, the floating and turret 1 is towed to the destination by the work boat 8 such as a tug boat while the floating turret 1 is levitated (see FIG. 2).

When the float-sink turret 1 reaches the destination, the tank 3 is filled with seawater ballast W so that the float-sink turret 1 is settled to reach the seabed B (see FIGS. 3 and 4). ). The filling of the seawater ballast W is performed by connecting the air supply / exhaust pipe 6a and the first operation air supply pipes 12a and 13a to the compressed air supply pipe 6b and the second operation air supply pipes 12b and 13b, respectively. This is performed by opening the valve 7 and the exhaust valve 11 and allowing the seawater ballast W to naturally fill the tank 3 from the pouring / draining port 5.

After that, after confirming that the seawater ballast W is filled in the tank 3 and the slag 1 has completely settled in the tank 3, the pipes 6a, 12a, 13a and 6b, 12b, 13b are connected to each other. Is released, and a blind plug is attached to the pipe end of the air supply / exhaust pipe 6a.

When changing the installation location of the turret 1, the pipes 6a, 12a, 13a and 6b, 12b, 13b are connected, and the pouring / draining valve 7 and the air supply valve 10 are opened. At the same time, the compressor 9 is operated to supply compressed air to the tank 3.

The seawater ballast W in the tank 3 is discharged by the supply of compressed air, and along with this, the buoyancy of the tank 3 gradually increases and the turret 1 floats (see FIG. 5).

When it is confirmed that the turret 1 has completely floated, the pouring / draining valve 7 is closed, the compressor 9 is stopped, and the exhaust valve 11 is opened to increase the pressure in the tank 3. Reduce the pressure to atmospheric pressure.

Thereafter, the pipes 6a, 12a, 13a and 6b, 12b, 13b are disconnected from each other, the pipe ends of the air supply / exhaust pipe 6a are blindly capped, and the turret 1 is changed by the work boat 8. Tow the ship to the place and perform the above installation work.

The float-sink turret according to the present invention is not limited to the above-mentioned embodiment, and can be appropriately improved and changed without departing from the basic idea of the present invention.

For example, as shown in FIG. 6, in addition to the configuration of the above embodiment, a sedimentation control mechanism 15 and a jet water ejection mechanism 16 as described below can be further provided.

That is, the sedimentation control mechanism 15 is provided with a liquid level gauge 17 for detecting the water level in the tank 3, and the opening levels of the supply / exhaust valves 10, 11 during the sedimentation operation are detected by the liquid level gauge 17. Based on the above, the controller 18 can automatically adjust. With such a settling control mechanism 15, the turret 1 can be floated and settled in a more stable state.

The jet water jetting mechanism 16 is arranged below the tank 3 on the turret body 2 side and is provided with an appropriate number of jet nozzles 19a ... And at the same time, it sucks seawater to the work boat 8 side and pumps it to the nozzle header 19 by a compressor or the like. The seawater pumping device 20 is provided so that the jet water J of seawater can be jetted downward from each nozzle 19a when floating and sinking.

By the way, when the bottom of the turret 1 is a soft layer C due to the accumulation of sludge as shown in FIG. 7 (A), the turret 1 should be installed on the bottom in a stable state. However, when raising the turret 1 that has been installed on the bottom for a long period of time, the bottom part is buried in an adhesive layer such as sludge, and earth and sand accumulate on the bottom part. It is often difficult to cut the turret 1 surely only by adjusting the buoyancy with the tank 3. However, even in such a case, if the jet water injection mechanism 15 is used, the bottom of the turret 1 and the ground cutting can be satisfactorily performed.

That is, when the turret 1 is bottomed, the seawater ballast W is poured into the tank 3 to settle the turret 1 (FIG. 7 (A)), and when the turret 1 approaches the bottom (or the soft bottom). At the time of bottoming on the weak layer C), the seawater pumping device 17 is operated to jet the jet water J from each nozzle 19a toward the bottoming point. When the jet water J is ejected, the ejection force blows off the soft layer C, and the firm base D under the soft layer C is exposed at the landing point (Fig. (B)). Therefore, the turret 1 will be installed on the solid base D in a stable state at the bottom ((C) of the same figure).

Further, as shown in FIG. 8 (A), when the turret 1 whose bottoming portion is buried in the sediment layer E such as sludge is levitated, jet water J is jetted and While blowing off the deposited layer E on and around the bottom part, a strong ground cutting force (levitation force) is applied to the turret 1 (FIG. 2B). By doing so, coupled with the increase in buoyancy due to the replacement of the seawater ballast W with the air A in the tank 3, the turret 1 is grounded and the floating is surely performed (FIG. 3C). The jet of the jet water J is stopped when the bottom of the turret 1 escapes from the sedimentary layer E.

The start / stop control of the jet of the jet water J may be automatically controlled in association with the valve opening control by the sedimentation control mechanism 15.

Further, the entire lifting / lowering operation mechanism 4 including the above-mentioned respective mechanisms 15 and 16 may be installed on the turret main body 2 side so as to be remotely controlled from the work boat 8 side.

[0035]

[Effect of the device]

 As will be easily understood from the above description, according to the present invention, since the floating and turret itself can be operated to float and sink, the work for installing and moving the turret can be efficiently and easily performed.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a floating slag according to the present invention.

FIG. 2 is an explanatory diagram showing a towed state of a floating sunk turret.

FIG. 3 is an explanatory diagram showing a sinking state of a floating slag.

FIG. 4 is an explanatory diagram showing a bottomed state of a floating slag.

FIG. 5 is an explanatory diagram showing a floating state of a floating slag.

FIG. 6 is a front view of a floating sledge showing another embodiment.

FIG. 7 is an explanatory view showing the bottoming action of the floating slag.

FIG. 8 is an explanatory view showing a ground cutting action of a floating slag.

[Explanation of symbols]

1 ... Floating and sinking turret, 2 ... turret main body, 3 ... buoyancy adjusting tank, 4 ... floating and sinking operation mechanism.

Claims (1)

[Scope of utility model registration request] 1. A float-sink turret comprising: a turret main body; a buoyancy adjustment tank provided on the turret main body; and a float-sink operation mechanism for supplying and discharging seawater ballast to and from the buoyancy-adjustment tank.