JP5773771B2 - Deep sea mixing equipment - Google Patents

Description

  The present invention relates to a deep sea mixing apparatus for improving a soft ground on the seabed and replacing it with a stable foundation ground.

  Conventionally, when developing coastal areas such as new construction, expansion and landfill of port facilities, it is effective to improve the soft ground consisting of alluvium on the seabed in order to prevent ground subsidence and liquefaction. It has been proven. In this ground improvement method, the deep ground mixing method (DCM: Deep Chemical Mixture Method) is used as a method for improving the continuous ground structure and stable foundation ground by stirring and mixing the soft ground lying on the seabed with the hardener. ) Is used.

In this deep soft ground processing method, a deep sea mixed processing ship 10 shown in FIGS. 5 and 6 is used as a dedicated work ship for improving the soft ground. Deep Mixing device is mounted on the sea Deep Mixing vessels 10 12 includes a tower (leader) 14 for supporting the whole, the sub-leader 16 that will be guided by the reader 14, the device body 18 to lift with or without sub-leader 16 And. The apparatus main body 18 includes a rod 22 having a stirring blade 22a at a lower end, and a drive unit 24 for rotationally driving the rod 22 and the stirring blade 22a (see, for example, Patent Documents 1 to 3).

Then, the apparatus main body 18 descends as the sub-leader 16 descends, and after the sub-leader 16 reaches the lower descent dead center, the apparatus main body 18 further descends, and the rod 22 and the drive unit 24 are submerged in water. To do. And the stirring blade 22a provided in the front-end | tip part of the rod 22 descend | falls to the depth D from the water surface WL. As described above, the deep mixing processing device 12 includes the two-stage lifting mechanism of the sub-leader 16 and the device main body 18, so that even in a construction zone where the height is restricted, the construction can be performed in deep water. It becomes possible. And while the rod 22 descends, the stirring blade 22a is rotationally driven by the drive unit 24 to excavate the soft ground on the seabed. In addition, a hardener such as cement or a cement-based solidifying agent is injected from the tip of the rod 22, and the in-situ soft-viscous soil and the hardener are forcibly mixed and stirred at the in-situ location, so that the chemical consolidation action is performed. Is used to form a strong stable soil in the ground.
In addition, the code | symbol 20 in a figure is a wire which concerns on raising / lowering of the sub leader 16, and the code | symbol 21 is a wire concerning raising / lowering of the drive part 24. FIG.

JP 04-247116 A JP-A-11-006143 JP 2008-150872 A

By the way, an oil-cooled hydraulic drive system is adopted for the drive unit 24 of the deep-mixing processing apparatus 12 from the viewpoint of securing a necessary driving force and ensuring cooling performance. However, the improvement of the drive unit 24 has been studied in order to further improve environmental measures (oil spill countermeasures).
The present invention has been made in view of the above problems, and is to provide a deep mixing treatment apparatus that takes into account further environmental measures while ensuring the driving force and sufficient cooling required for the drive unit. is there.

(Aspect of the Invention)
The following aspects of the present invention exemplify the configuration of the present invention, and will be described separately for easy understanding of various configurations of the present invention. Each section does not limit the technical scope of the present invention, and some of the components of each section are replaced, deleted, or further while referring to the best mode for carrying out the invention. Those to which the above components are added can also be included in the technical scope of the present invention.

(1) A leader standing on the hull, a sub-leader that is guided by the leader and moves up and down between the air and the water, and moves up and down between the air and the water with or without the sub-leader. A device body,
The apparatus main body includes a rod having a stirring blade at a lower end, a driving unit for rotationally driving the rod and the stirring blade located at the upper end of the rod, and only in the air without being submerged in water. A deep sea mixing apparatus including an air-cooled cooling device that moves up and down following the drive unit (Claim 1).
The deep mixing processing apparatus described in this section is forcibly air-cooled by the air-cooling cooling apparatus when the drive unit is in the up-and-down section in the air. This air-cooled cooling device follows the drive unit only in the up and down section in the air without being submerged in water, but the drive unit is submerged in the water when the drive unit descends and moves to the underwater up and down section. As a result, the water is cooled by the surrounding water. In this manner, the required cooling performance is ensured by cooling the drive unit in the air by the air cooling method and in the water by the water cooling method. In addition, as a power source of a drive part and an air cooling cooling device, an electric motor is used, for example.

(2) The deep sea mixing apparatus according to (1) above, wherein the lifting and lowering means of the driving unit also serves as the lifting and lowering means of the air-cooled cooling device in the lifting section in the air.
In the deep-mixing processing apparatus described in this section, the air-cooling cooling device is driven up and down by the lifting and lowering means of the drive unit in the lifting section in the air, and the lifting and lowering means dedicated to the air-cooling cooling apparatus is unnecessary.

(3) In the above item (2), the drive unit is housed in a case that is lifted and lowered by a lift unit independent of the lift unit related to the sub-leader, and the air-cooling / cooling device holds the case of the drive unit above the case. A deep sea mixing apparatus including a housing covering from the sea (Claim 3).
In the deep sea mixing apparatus described in this section, the drive unit is housed in a case that is lifted and lowered by lifting means independent of the lifting means related to the sub-leader, and can be lifted and lowered independently of the sub-leader. Further, since the housing of the air cooling cooling device covers the case of the driving unit from above, the air cooling cooling device moves up and down following the lifting and lowering operation of the driving unit. That is, the raising / lowering means of the drive unit also serves as the raising / lowering means of the air-cooling cooling device.

(4) In the above (3), the air-cooled cooling device is a deep sea mixing apparatus including an air-cooling fan held in the housing (Claim 4).
The deep mixing processing apparatus described in this section forcibly air-cools the drive unit in the case by the air-cooling fan held in the housing of the air-cooling cooling device while the air-cooling cooling device moves up and down following the lifting and lowering operation of the driving unit. Is.

(5) In the above (1) to (4), a deep sea mixing apparatus (Claim 5), wherein the hull is provided with a stopper for determining a lowering dead center of the air-cooled cooling device.
The deep-sea mixing processing device described in this section is designed to ensure that the air-cooled cooling device stops on the ship, that is, in the air, and sinks into water by a stopper provided on the hull that determines the lowering dead center of the air-cooled cooling device. To prevent this. Specifically, the housing abuts against the stopper at the lowering dead center of the air cooling device.

  Since this invention was comprised in this way, it becomes possible to provide the deep mixing processing apparatus which considered the further environmental measure, ensuring the driving force and sufficient cooling property which are required for a drive part.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a deep sea mixing apparatus according to an embodiment of the present invention, in which (a) is a perspective view of a main part around an air-cooled cooling device, and (b) is a housing of an air-cooled cooling device and a case of a drive unit. FIG. It is a perspective view which shows the state which the air-cooling cooling device and drive part which were shown by FIG. 1 isolate | separated to the raising / lowering direction. It is operation | movement explanatory drawing of the deep sea mixing processing apparatus which concerns on embodiment of this invention, (a) is the state which has a subleader, an air cooling cooling device, and a drive part in the top dead center of the raising / lowering range, (b) Shows a state in which the sub-leader and the air-cooled cooling device are at the bottom dead center of the lifting range. It is operation | movement explanatory drawing of the deep sea mixing processing apparatus which concerns on embodiment of this invention, (a) is a state in which all of a subleader, an air-cooling cooling device, and a drive part are in the bottom dead center of the raising / lowering range ( b) shows a state where the air-cooling cooling device is at the bottom dead center of the lifting range when the shallow portion is improved. It is a side view of the conventional deep sea mixing apparatus. It is a front view of the conventional deep sea mixing apparatus shown in FIG.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings. Here, parts that are the same as or correspond to those in the prior art are denoted by the same reference numerals, and detailed description thereof is omitted.
As shown in FIG. 1A, the deep sea mixing apparatus according to the embodiment of the present invention moves up and down between the air and the water together with the sub leader 16 and the sub leader 16 alone. And a main body 18. The sub-leader 16 is guided by a leader 14 (see FIGS. 5 and 6) erected on the hull 10a of the deep sea mixing processing ship 10 (see FIGS. 5 and 6) and moves up and down.
The apparatus main body 18 includes a rod 22 having a stirring blade 22a (see FIGS. 5 and 6) at the lower end, and a drive unit 24 that is positioned at the upper end of the rod 22 and rotationally drives the rod 22 and the rotating blade 22a. And an air-cooled cooling device 26 that moves up and down following the drive unit 24 in the up-and-down section in the air. For convenience, in FIGS. 1 to 4, the rotor blade 22 a located at the tip of the rod 22 is omitted.

  The drive unit 24 uses an electric motor as a power source, and transmits power to the rod 22 through a speed reducer as appropriate. The drive unit 24 is housed in the case 28 as shown in FIG. The case 28 is composed of a plate-like and frame-like framework, and the drive unit 24 is in communication with the outside of the case 28 from between the frame-like frameworks. The case 28 is moved up and down by lifting means independent of the lifting means related to the sub-leader 16 (the wire 21 forms a part thereof). In the figure, reference numeral 30 denotes a pulley around which the wire 21 is wound, and reference numeral 32 denotes a guide roller provided as necessary, which comes into contact with the housing 34 described later from the inside.

The air-cooling cooling device 26 includes a housing 34 that covers the case 28 of the drive unit 24 from above, and an air-cooling fan 36 that is held by the housing. The housing 34 is composed of a frame-shaped frame, and although not particularly necessary, in the illustrated example, a mesh plate 38 is provided between the frames. The housing 34 is configured to cover the case 28 of the drive unit 24 from above. A part of the framework of the housing 34 comes into contact with the case 28 of the drive unit 24 from above, so that the housing 34 moves up and down following the case 28 of the drive unit 24. Therefore, the raising / lowering means of the air cooling / cooling device 26 also serves as the raising / lowering means of the drive unit 24 in the raising / lowering section in the air. In the illustrated example, only one large air-cooling fan 36 is provided on the upper portion of the housing 34. However, if necessary, two or more machines, and further, an electric motor provided for each rod 22 of the drive unit 24 may be used. Each may be provided individually.
Further, as will be described later, a frame-like skirt 40 is provided at the lower end portion of the housing 34 so as to come into contact with the stopper 42 at the bottom lowering dead center of the air-cooling cooling device 26. An electric motor is used as a power source for the air cooling fan 36 of the air cooling cooling device 26.

  Further, as shown in FIG. 1A, the hull 10 a is provided with a stopper 42 that determines the lowering dead center of the air-cooled cooling device 26. The stopper 42 is provided so as to protrude upward adjacent to the opening 10b through which the apparatus body 18 of the hull 10a passes when the apparatus main body 18 moves up and down. And the top part 42a contacts the frame-like skirt 40 of the air-cooling cooling device 26.

Here, the operation of the deep sea mixing apparatus according to the embodiment of the present invention will be described with reference to FIGS. For convenience, the reader 14 (FIGS. 5 and 6) is omitted in FIGS.
FIG. 3A shows a state in which the sub-leader 16, the drive unit 24, and the air cooling / cooling device 26 are at the top dead center in the ascending / descending range. From this state, the sub-leader 16, the drive unit 24, and the air cooling / cooling device 26 are moved down as shown in FIG. The sub-leader 16 reaches the bottom dead center of the lifting range, and the air cooling cooling device 26 has a bottom dead center at the position where the skirt 40 at the lower end of the housing 34 contacts the stopper 42.

  From this state, the drive unit 24 and the rod 22 are further lowered independently. At this time, the driving unit 24 is guided by the sub leader 16 and smoothly descends without colliding with the hull 10a. As shown in FIG. 4A, the rod 22 reaches the sea bottom GL. In addition, when raising the drive part 24, operation | movement contrary to the above will be performed.

FIG. 4B shows a case where the depth of the sea floor GL is shallow. In this case, only the drive unit 24 and the air-cooling cooling device 26 are lowered without lowering the sub leader 16.
In the example of FIG. 4B, the rod 22 has reached the sea floor GL, the drive unit 24 is located in the machine, the air cooling cooling device 26 is in contact with the stopper 42, and the drive unit 24 is It is covered with the air-cooling cooling device 26 and is in a state of forced air cooling.

Now, according to the embodiment of the present invention configured as described above, the following operational effects can be obtained.
That is, when the drive unit 24 is in the up-and-down section in the air, the deep mixing processing device 12 according to the embodiment of the present invention is introduced by the fan 36 of the air-cooling cooling device 26 as shown in FIG. The air Ah that is forcibly air-cooled and warmed by the cool air Ac that is discharged is discharged from the drive unit 24 to the outside. The air-cooled cooling device 26 follows the drive unit 24 only in the air lifting section without being submerged in the water. However, when the driving section 24 moves down and moves to the water lifting section (FIG. 4A). )), The drive unit 24 is submerged in water, so that it is cooled by the surrounding water. As described above, the deep layer processing apparatus 12 according to the embodiment of the present invention can secure the necessary cooling performance by cooling the drive unit 24 by air cooling method in the air and by water cooling method in the water. It is. In addition, since an electric motor is used as a power source of the air cooling fan 36 of the air cooling cooling device 26, the environment is considered. The drive unit 24 is also designed with consideration for the environment by using an electric motor as a power source.

In addition, the air-cooling cooling device 26 is driven up and down by the lifting means (wire 21 and the like) of the driving unit 24 in the lifting section in the air, and does not require an independent driving means, so that its installation is easy. It is. Therefore, it is possible to retrofit the apparatus main body 18 of the existing deep mixing processing apparatus and attach the air-cooling cooling apparatus 26.

The drive unit 24 is housed in a case 34 that is lifted and lowered by lifting means (wires 21 and the like) independent from the lifting means (wires 20 and the like) according to the sub-leader 16, and is independent of the sub-leader 16 together with the rods 22. Since the housing 34 of the air-cooling cooling device 26 covers the case 28 of the driving unit 24 from above, the air-cooling cooling device 26 moves up and down following the lifting operation of the driving unit 24. It has become.
The air-cooling cooling device 26 forcibly air-cools the driving unit 24 in the case 28 by the air-cooling fan 36 held by the housing 34 of the air-cooling cooling device 26 while moving up and down following the lifting and lowering operation of the driving unit 24. It is.

  Further, the stopper 42 for determining the lowering dead center of the air cooling cooling device 26 provided in the hull 10a can prevent the air cooling cooling device 26 from stopping on the ship, that is, in the air, and being submerged in water. . Specifically, at the bottom-down dead center of the air-cooling cooling device 26 (FIGS. 3B, 4A and 4B), the housing 34 abuts against the stopper 42, so that the air-cooling cooling device 26 is in the air. It will surely stop.

  10: Deep sea mixing processing vessel, 12: Deep mixing processing device, 14: Leader, 16: Sub-leader, 18: Device main body, 20, 21: Wire, 22: Rod, 24: Drive unit, 26: Air-cooling cooling device, 28: Case, 32: Guide roller, 34: Housing, 36: Cooling fan, 40: Skirt, 42: Stopper, 42a: Top, 42b: Vertical wall surface

Claims (5)

And the reader erected on the hull, being guided by the leaders, and Rusa breeders to lift between the aerial and the water, with or without the sub reader device body for vertically between the aerial and water And
The apparatus main body includes a rod having a stirring blade at a lower end, a driving unit for rotationally driving the rod and the stirring blade located at the upper end of the rod, and only in the air without being submerged in water. A deep sea mixing apparatus characterized by comprising an air-cooled cooling device that moves up and down following the drive unit. 2. The deep sea mixing apparatus according to claim 1, wherein the elevating means of the drive unit also serves as the elevating means of the air-cooled cooling device in an air elevating section. The drive unit is housed in a case that is lifted and lowered by a lift unit independent of the lift unit related to the sub-leader, and the air cooling and cooling device includes a housing that covers the case of the drive unit from above. The deep sea mixing apparatus according to claim 2. The deep sea mixing apparatus according to claim 3, wherein the air cooling apparatus includes an air cooling fan held in the housing. 5. The deep sea mixing apparatus according to claim 1, wherein the hull is provided with a stopper for determining a lowering dead center of the air-cooled cooling device.

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