JP7300208B1 - Seawater pressure lift mechanism - Google Patents

Abstract

A lift device capable of lifting and lowering a heavy object placed on a cargo handling pedestal by actuating a piston in a cylindrical pipe with water pressure accompanying the inflow and outflow of seawater into and out of the cylindrical pipe. A seawater pressure lift capable of raising and lowering cargo using seawater pressure includes a main cylinder that can extend into the sea, a piston that slides up and down in the main cylinder, and a piston on the upper surface of the piston. It consists of a rod that is provided and extends upward, and a cargo handling pedestal that is provided at the upper end of the rod and holds cargo. A cylindrical tube with a closed bottom, an inflow hole that allows seawater outside the cylindrical tube to flow into the hollow portion between the bottom of the cylindrical tube and the piston, and a seawater that has flowed into the cylindrical tube to be discharged to the outside. and a discharge hole with a drain pump, and the cargo handling base is rotatable with respect to the rod. [Selection drawing] Fig. 1

Description

The present invention relates to a seawater pressure lift mechanism capable of lifting and lowering cargo using seawater pressure.

In the construction of water facilities such as excavation of submarine resources, the building materials required for the facilities themselves are often large and heavy, and large-scale ships such as transport ships and crane ships are used along with the building materials. For this reason, when moving building materials from land to sea, it is essential to have materials handling equipment such as gate-type cranes and large forklifts that can handle heavy objects. I needed it. However, large-sized transportation equipment is proportional to its output and has poor fuel efficiency, so in recent years when decarbonization has been called for, there has been a demand for both advanced port functions and deoxygenation.

In order to solve the above problem, as in Japanese Patent No. 5767058 (Patent Document 1), ballast water in a ballast water chamber provided in a gripping portion is drained to generate buoyancy. A technical proposal has been made to levitate and move an underwater structure used for such purposes from the bottom of the water.

However, the technical proposal according to Patent Document 1 only describes a method of moving caissons that have sunk to the bottom of the water, and does not consider the use of materials that are loaded and unloaded at marine facilities such as ports.

The applicant focused on the means of moving heavy objects such as materials in offshore facilities, and based on the idea that it would be possible to move heavy objects with a simple structure on the sea, developed a lift device capable of lifting and lowering a heavy object placed on a cargo handling pedestal by actuating the piston in the cylindrical tube, leading to the proposal of the "seawater pressure lift mechanism" according to the present invention. .

Japanese Patent No. 5767058

An object of the present invention is to provide a lift device capable of lifting and lowering a heavy object placed on a cargo handling pedestal by actuating a piston in a tubular pipe with water pressure accompanying the inflow and outflow of seawater into and out of the tubular pipe.

In order to solve the above problems, the present invention provides a seawater pressure lift capable of raising and lowering cargo using seawater pressure, comprising a main cylinder that can extend into the sea, and a main cylinder that slides up and down inside the main cylinder. It consists of a piston, a rod provided on the upper surface of the piston and extending upward, and a cargo handling pedestal provided on the upper end of the rod and on which cargo is placed. The main cylinder has a hollow portion and is substantially perpendicular to the sea surface. a tubular tube with an open top surface and a closed bottom surface; an inflow hole through which seawater outside the tubular tube can flow into the hollow portion between the bottom surface of the tubular tube and the piston; and a discharge hole equipped with a drain pump capable of discharging the discharged seawater to the outside. When seawater flows into the piston, the water pressure raises the piston and closes the inflow hole to operate the drain pump, which causes the seawater between the bottom surface of the cylindrical tube and the piston to be discharged from the discharge hole, thereby lowering the piston. A means is adopted in which the cargo placed on the cargo handling pedestal can be raised and lowered by vertically moving the cargo handling pedestal via the rod in conjunction with the vertical movement of the piston.

In addition, the present invention employs means for changing the direction of the cargo handling pedestal by rotatably providing the cargo handling pedestal with respect to the rod.

According to the seawater pressure lift mechanism according to the present invention, it is possible to vertically move the cargo handling pedestal by sliding the piston up and down according to the water level and water pressure that increase and decrease due to the inflow and drainage of seawater into the hollow part of the tubular pipe. Therefore, the energy required for lifting and lowering the cargo placed on the cargo handling pedestal can be compensated for by the sea pressure, thereby contributing to the energy saving of the entire work.

Further, according to the seawater pressure lift mechanism according to the present invention, since the cargo handling pedestal is rotatably provided with respect to the rod, it is possible to appropriately change the orientation of the cargo handling pedestal in any direction. Even if the loading direction (sea side) and the unloading direction (land side) from the cargo handling pedestal are different, as in the case of unloading cargo from the cargo handling pedestal, rotate the cargo handling pedestal appropriately to change the direction. There is an excellent effect that it can be handled by

1 is an overall perspective view showing an embodiment of a seawater pressure lift mechanism according to the present invention; FIG. It is an explanatory view showing a mode of use of the seawater pressure lift mechanism according to the present invention.

In the seawater pressure lift mechanism according to the present invention, the piston 6 rises and falls as the seawater pressure increases and decreases due to the seawater flowing into the tubular pipe 2, and the cargo T placed on the cargo handling pedestal 10 can be raised and lowered. The biggest feature is that
An embodiment of a seawater pressure lift mechanism according to the present invention will be described below with reference to the drawings.

It should be noted that the seawater pressure lift mechanism according to the present invention is not particularly limited to the embodiments described below. It can be appropriately changed within the scope of the material and the like.

FIG. 1 is an overall perspective view showing an embodiment of a seawater pressure lift mechanism according to the present invention. Moreover, FIG. 2 is an explanatory diagram showing a mode of use of the seawater pressure lift mechanism according to the present invention.
The seawater pressure lift mechanism according to the present invention is a lift mechanism that raises and lowers a cargo handling pedestal 10 by seawater pressure. there is

The main cylinder 1 includes a tubular tube 2 having a hollow portion in which a piston 6 can be installed, an inflow hole 3 through which seawater can flow into the hollow portion of the tubular tube 2, and a seawater flown into the hollow portion of the tubular tube 2. and a drain hole 4 with a drain pump 5 capable of draining to the outside.

The cylindrical tube 2 has a hollow portion in which the piston 6 can be installed, and is provided so as to extend substantially perpendicularly to the sea surface when used as a sea pressure lift. Regarding the shape and length of the cylindrical tube 2, it is formed in a substantially cylindrical shape with a hollow portion having an inner diameter (slightly larger than the outer diameter of the piston 6) in which the piston 6 can slide. is formed to have a total length longer than the necessary lifting distance of the cargo T. The top surface of the cylindrical tube 2 is partly or entirely open so that an elongated rod 8 can move up and down above the piston 6, and the bottom surface of the cylindrical tube 2 stores the inflowing seawater. blocked as much as possible.

The inflow hole 3 is a hole for allowing seawater to flow into the hollow portion of the cylindrical tube 2. More specifically, the seawater flows between the closed bottom surface of the cylindrical tube 2 and the piston 6 provided in the hollow portion. It is a hole for inflow. By allowing seawater to flow into the hollow portion from the inflow hole 3, the seawater pressure pushes the piston 6 upward. The water level of the seawater that has flowed into the hollow portion fluctuates depending on the water head pressure (the load applied to the piston 6) in the cylindrical tube 2, but it can rise up to near the seawater level outside the main cylinder 1 at maximum. becomes. Although not shown, the inflow hole 3 adopts a structure (for example, a valve structure) that can switch between opening and closing, and can switch between inflow and stop of seawater. The position of the inflow hole 3 is not particularly limited. 2, and more specifically, near the lower end of the bottom surface or side wall of the cylindrical tube 2. As shown in FIG. Also, the size and number of the inflow holes 3 are not limited. can be adopted. By adopting such a mode, it becomes possible to adjust the speed at which the piston 6 moves upward.

The discharge hole 4 is a hole for discharging the seawater stored in the hollow portion of the tubular tube 2 to the outside. By discharging seawater from the discharge hole 4 to the outside, the water level in the hollow portion is lowered and the piston 6 is lowered. Due to the head pressure, the seawater stored in the hollow portion is not naturally discharged to the outside. The discharge hole 4 has a structure (for example, a valve structure) that can switch between opening and closing, and can switch between discharging and stopping seawater. The position of the discharge hole 4 is not particularly limited. It needs to be provided in the lower region of the tube 2, and more specifically, it is provided near the lower end of the bottom surface or side wall of the tubular tube 2. As shown in FIG. Also, the size and number of the discharge holes 4 are not limited, and by adjusting the discharge amount over time by the discharge pump 5, the speed at which the piston 6 moves downward can be adjusted.

The drain pump 5 is for forcibly discharging the seawater in the hollow portion of the cylindrical pipe 2 to the outside, and is directly or indirectly connected to the discharge hole 4 and pumps the cylindrical pipe 2 through the discharge hole 4. The seawater in the hollow part is sucked and discharged into the sea. The specific structure and specifications of the drainage pump 5 are not particularly limited, as long as conventionally known structures and specifications are adopted.

The piston 6 is provided in the hollow part of the cylindrical tube 2. By increasing or decreasing the seawater stored in the hollow part between the bottom surface of the piston 6 and the bottom surface of the cylindrical tube 2, the inside of the hollow part moves vertically. Slide up and down. The shape of the piston 6 is substantially cylindrical, and there is no particular limitation on the vertical length (total height), but the piston 6 is slightly larger than the inner diameter of the cylindrical tube 2 to the extent that it can slide inside the hollow portion of the cylindrical tube 2 . It has a reduced outer diameter. At this time, one or more piston rings are provided on the outer peripheral wall of the piston 6 so that the seawater existing below the piston 6 does not pass through a small gap between the piston 6 and the cylindrical tube 2 and leak above the piston 6. It is preferable to secure the watertightness by applying a water leakage prevention means such as providing a . Moreover, by making the inside of the substantially cylindrical piston 6 hollow and filled with air, the weight of the piston 6 itself can be reduced and the buoyancy can be increased. A lower end of a rod 8 extending upward is fixed to the upper surface of the piston 6 .

The rod 8 is an elongated rod-shaped body that directly transmits the vertical movement of the piston 6 to the cargo handling pedestal 10 . Accordingly, the upper end of the rod 8 is connected to a predetermined portion on the lower surface of the cargo handling pedestal 10 , and the lower end of the rod 8 is fixedly connected to a predetermined portion on the top surface of the piston 6 . As a result, the cargo handling pedestal 10 and the cargo T placed thereon can be moved up and down in conjunction with the vertical movement of the piston 6 . The shape of the rod 8 is not particularly limited. It is necessary to have a length sufficient to protrude and a thickness having a load strength sufficient to support the cargo T placed on the cargo handling pedestal 10 .

Regarding the structure of the rod 8, it is also possible to form it in the shape of a pipe having a hollow portion as long as it has the required load strength. By adopting such a mode, the load applied to the piston 6 can be reduced.
Further, it is also possible to adopt a mode having an extension mechanism capable of adjusting the full length of the rod 8, and by extending the rod 8, the cargo T can be raised and lowered even to a high place where the lift width of the piston 6 is insufficient.
Furthermore, it is conceivable to provide not only one rod 8 but also a plurality of rods 8, which contributes to improving the support stability and load strength of the cargo handling pedestal 10. FIG.
Also, one or a plurality of sub-rods 8 that move up and down by pneumatic pressure or the like are provided at the connecting portion between the tip of the rod 8 and the cargo handling pedestal 10 so that the slight inclination of the cargo handling pedestal 10 can be adjusted.

The cargo handling pedestal 10 is a pedestal on which the cargo T can be placed. The size and shape of the cargo handling pedestal 10 are not particularly limited. It is conceivable that a mode of providing In addition, if a mode in which the cargo handling pedestal 10 is formed in a fork shape is adopted, it becomes possible to raise and lower the cargo T placed on the pallet together with the pallet. Although not shown, it is also preferable to provide a rolling bearing at a predetermined position on the cargo handling pedestal 10 so that the cargo T can be easily moved on the cargo handling pedestal 10 .

Regarding the connection between the cargo handling pedestal 10 and the rod 8, the fixed connection mode similar to the fixing mode of the lower end of the rod 8 on the upper surface of the piston 6 is not adopted. Even if the loading direction (sea side) to the cargo handling pedestal 10 and the unloading direction (land side) from the cargo handling pedestal 10 are different, in order to enable loading and unloading of the cargo T from one side of the cargo handling pedestal 10, A mode is adopted in which the cargo handling pedestal 10 is horizontally rotatably connected to the extending rod 8 . The specific structure for the rotatable connection is not particularly limited, but for example, a gear motor and a rotating gear mechanism are provided in the connecting portion between the rod 8 and the cargo handling pedestal 10, and the rotation of the gear motor is used for cargo handling. A mode in which the pedestal 10 is rotated is conceivable. Alternatively, the tip of the rod 8 and the cargo handling base 10 are connected via a bearing mechanism so that the cargo handling base 10 is rotatably connected to the rod 8, and the actual rotation is performed by manual means or some mechanical means. Aspects are also possible. In this way, by rotatably connecting the cargo handling seat 10 to the rod 8, it becomes possible to change the orientation of the cargo handling seat 10 in any desired direction. Efficiency can be improved.

The seawater pressure lift mechanism according to the present invention is composed of the components described above. That is, the seawater pressure lift mechanism according to the present invention includes a main cylinder 1 composed of a cylindrical tube 2 having a hollow portion, a piston 6 provided in the cylindrical tube 2, and a top surface of the piston 6 connected to the lower end. and a cargo handling pedestal 10 which is connected to the upper end of the rod 8 and on which the cargo T can be placed. is set. Regarding the arrangement means, there is a mode in which a foundation is installed at a required height from the seabed and the main cylinder 1 is fixedly mounted on the foundation, or a side wall of the main cylinder 1 is fixed to a quay wall, offshore structure, or the like. It is possible to conceive a mode in which they are physically connected. It can be installed anywhere on the sea where it is necessary to load and unload cargo T, for example, industrial ports, commercial ports, energy ports, fishing ports, and oil ports. It is installed adjacent to a submarine resource mining site such as a platform or an offshore structure, and is mainly used for loading and unloading cargo T on a ship.

Next, the operation of the seawater pressure lift mechanism according to the present invention and the flow of cargo lifting work will be described.
First, the case where the cargo handling pedestal 10 and the cargo T are raised will be described. By opening the inflow hole 3 provided in the lower region of the cylindrical tube 2 in the main cylinder 1, the seawater outside the main cylinder 1 flows through the inflow hole 3 into the closed bottom surface of the cylindrical tube 2 and the piston 6. flows into the hollow space between The water level of the inflowing seawater can rise up to the vicinity of the seawater level outside the main cylinder 1 due to the relationship of the water head pressure. do. Incidentally, by closing the inflow hole 3 while seawater is flowing in, it is possible to stop the upward movement due to the sliding of the piston 6 in the middle. As the piston 6 slides upward, the rod 8 connected to the piston 6 is pushed upward, and the cargo handling seat 10 connected to the upper end of the rod 8 and the cargo handling seat 10 move. The loaded cargo T is lifted. When the cargo handling pedestal 10 reaches the height required for loading and unloading the cargo T, the inflow hole 3 is closed to stop any further rise.

Next, the case of lowering the cargo handling pedestal 10 and the cargo T will be described. The discharge hole 4 provided in the lower area of the cylindrical tube 2 in the main cylinder 1 is opened, and the drain pump 5 connected to the discharge hole 4 is operated. As a result, the seawater stored in the hollow portion between the closed bottom surface of the cylindrical tube 2 and the piston 6 is forcibly sucked from the discharge hole 4 by the drain pump 5, and the seawater outside the main cylinder 1 is discharged. and the water level inside the hollow falls. This water level drop causes the piston 6 to slide downward within the hollow portion. By stopping the operation of the drainage pump 5 while the seawater is being discharged, the descent due to the sliding of the piston 6 can be stopped halfway. As the piston 6 slides downward, the rod 8 connected to the piston 6 is pulled back downward, and the cargo handling seat 10 connected to the upper end of the rod 8 and the cargo handling seat 10 The loaded cargo T descends. When the cargo handling pedestal 10 reaches a height required for loading and unloading the cargo T, the operation of the drainage pump 5 is stopped and the discharge hole 4 is closed to stop further descent.

Although the basic configuration and operation of the seawater pressure lift mechanism according to the present invention have been described above, the present invention is not limited to the above embodiments or the configuration shown in the drawings. For example, a mode in which a plurality of main cylinders 1, pistons 6 and rods 8 are connected to one cargo handling pedestal 10 to raise and lower a huge cargo T; It is also conceivable to provide a mode that enables fine adjustment to the cargo lifting position. In addition, one or more drainage holes are provided at predetermined positions in the upper portion of the cylindrical tube 2 to eliminate the leakage of sea water from the bottom of the piston 6, and the piston 6 rises. In some cases, it is also possible to employ a mode in which leaked water can be drained to the outside through the drain hole.

As described above, according to the seawater pressure lift mechanism according to the present invention, the piston 6 is slid up and down due to the water level and water pressure that increase and decrease due to the inflow and discharge of seawater into the hollow portion of the cylindrical tube 2 in the main cylinder 1. The cargo handling pedestal 10 can be moved up and down, and the energy required when the cargo T placed on the cargo handling pedestal 10 is lifted can be supplemented by the sea pressure, and the efficiency of work and energy saving. It is something that contributes to

The seawater pressure lift mechanism according to the present invention can be installed not only in harbors and underwater where seawater can be used, but also in lakes, marshes and dams that have a required water depth and can use water pressure. Therefore, it is believed that the "seawater pressure lift mechanism" according to the present invention has great industrial applicability.

REFERENCE SIGNS LIST 1 main cylinder 2 cylindrical tube 3 inflow hole 4 discharge hole 5 drainage pump 6 piston 8 rod 10 loading platform T cargo W seawater

Claims (1)

A sea pressure lift capable of raising and lowering cargo using sea pressure,
A main cylinder that can extend into the sea, a piston that slides up and down in the main cylinder, a rod that is provided on the upper surface of the piston and extends upward, and a cargo handling pedestal that is provided on the upper end of the rod and on which cargo is placed. consists of
The main cylinder includes a cylindrical tube having a hollow portion and extending substantially perpendicularly to the sea surface and having an open top surface and a closed bottom surface. An inflow hole that can flow into the hollow part of the cylindrical tube, and a discharge hole equipped with a drainage pump that can discharge seawater that has flowed into the cylindrical tube to the outside,
The cargo handling pedestal is rotatable with respect to the rod so that the orientation of the cargo handling pedestal can be changed,
By lowering the main cylinder into the sea so that the upper part is above the sea surface and opening the inflow hole, seawater flows in between the bottom of the cylindrical tube and the piston, and the water pressure raises the piston and closes the inflow hole. By activating the drainage pump, the seawater between the bottom surface of the cylindrical pipe and the piston is discharged from the discharge hole to lower the piston, and the cargo handling pedestal moves up and down through the rod in conjunction with the vertical movement of the piston. and a seawater pressure lift mechanism capable of lifting and lowering a cargo placed on the cargo handling pedestal.

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