KR101245573B1

KR101245573B1 - Damping joint apparatus for mobile harbor lifting system

Info

Publication number: KR101245573B1
Application number: KR1020100127396A
Authority: KR
Inventors: 박명관; 윤영원; 이성민; 서정욱; 정민호
Original assignee: 부산대학교 산학협력단; 한국과학기술원
Priority date: 2009-12-22
Filing date: 2010-12-14
Publication date: 2013-03-20
Also published as: KR20110073273A

Abstract

A damping joint device for a mobile harbor lifting system is disclosed.
Damping joint device for a mobile harbor lifting system according to an embodiment of the present invention is a footrest coupled to the upper end of the lifting device for lifting up and down the crane in the mobile harbor, a plurality of universal joints arranged on top of the footrest; Each end of the piston rod is coupled to the universal joint portion, and includes a damping cylinder having a cylinder body filled with hydraulic fluid.

Description

Damping joint device for mobile harbor lifting system {DAMPING JOINT APPARATUS FOR MOBILE HARBOR LIFTING SYSTEM}

The present invention relates to impact attenuation and posture stability, and more particularly, to a damping joint device for a mobile harbor lifting system capable of improving the use stability of a mobile harbor and mitigating impact of a lifting device.

Recently, with the increase of international logistics, the volume of imports and exports by sea is increasing dramatically.

As a result, more than 10,000 TEU-class giant ships have emerged, and the size of the container terminal is growing large enough for large vessels to dock.

Therefore, a number of large cranes are installed in the world's advanced ports for loading or unloading containers.

In general, a crane for transporting a container is an unloading device that loads and unloads a container between a ship and a pier. The ship and unloading speed of a container crane is a key factor in determining the handling speed of a ship and the processing capacity of the entire pier cargo. .

However, as the processing capacity and the hull size of container ships increase day by day, large container ships are difficult to access to the wharf with a crane, or do not pass through a narrow canal and operate by bypass.

As a countermeasure, a mobile harbor, a so-called 'moving port', has emerged.

Mobile Harbor is a concept that connects large container ships anchored in deep waters to low water ports, attracting attention as a new maritime container transport.

The mobile harbor can cope with the demand for container transportation without the construction or expansion of new ports, the problem of trans-shipment of cargo at sea, securing the depth of sea route and dock, the reduction of the number of docking of container terminal berth, container berth It is suggested as an alternative to secure the cargo and speed up the process of transshipment cargo, and it is expected to bring various forms of logistics innovation, such as efficient handling of cargo and substitution of sea transportation for land transportation.

However, since the crane mounted in the mobile harbor is installed to have a height of several tens of meters from the upper deck of the hull, since it is affected by the operation and the wind wave of the mobile harbor, it has a great influence on the six degrees of freedom of the crane itself. Also, there are many difficulties in controlling skew, trim, list, and shift attitude of the spreader installed in the crane. It is a difficult state.

For example, the stand-alone container ship according to the prior art, as shown in Figure 1, the Republic of Korea Patent Publication No. 2002-0025090, the hull (1) without the container, and the hull to accommodate the container The holder 2 formed in (1), the container handling means 3, the steering chamber 4, and the mast 5 which supports the radar antenna 6 are provided.

Here, the container handling means 3 is mounted on the mobile gantry crane 7, the mobile gantry crane 7, which is operated by covering the entire length of the container holder 2, and lifts the container with the spreader 8. It is comprised by the crane 9 which can be unloaded.

In particular, in the stand-alone container ship according to the prior art, the gantry traveling device 10 coupled between the lower frame or the Sill beam of the mobile gate-type crane 7 and the rail on the upper deck is connected to the mobile gantry-type crane 7. There is no lifting device for expanding the height or lifting or lowering the upper frame relative to the lower frame.

Therefore, the stand-alone container ship of the prior art can not lower the height of the upper frame of the mobile gantry crane 7 to the upper deck in accordance with the change in the sea conditions, there is a disadvantage that excessive shaking occurs in accordance with the sea conditions such as wind wave. .

In addition, the connection between the gantry running device 10 and the upper frame of the mobile gantry crane 7 of the independent container ship of the prior art is not equipped with any impact attenuation device, the situation is not able to mitigate the impact.

In addition, even if the conventional container ship of the prior art has a mooring device or an automatic position control system (Dynamic Position System), the influence of the wind load and the movement by the wave is inevitable.

Embodiment of the present invention is to reduce the impact between the lifting cylinder and the crane by installing a damper assembly that can mitigate the impact on the connection between the mobile harbor lifting cylinder and the crane portion installed in the hull.

According to an aspect of the invention, the scaffolding portion coupled to the upper end of the lifting device for lifting up and down the crane portion in the mobile harbor, a plurality of universal joints arranged on top of the scaffolding portion, the universal joint portion of the piston rod A damping joint device may be provided for a mobile harbor lifting system including a damping cylinder having a cylinder body filled with a hydraulic body filled with an end portion thereof.

In addition, the scaffolding portion is inclinedly extended so as to form a shape of the upper and lower light on each of the smooth upper surface, a plurality of inclined surface on which the universal joint portion is inclined, a side surface extending vertically downward from the inclined surface, and the lower side of the side And a ball joint groove formed at the bottom center position to be engaged with the bottom surface formed and the pivot ball formed at the upper end of the lifting device.

In addition, the damping cylinder may be arranged while maintaining the same separation distance in all directions between the scaffolding portion and the crane portion.

In addition, the damping cylinder has a first port formed for supplying or recovering the hydraulic oil to the piston front side of the piston rod, a second port formed for supplying or recovering the hydraulic oil to the piston rear side of the piston rod, and the damping cylinder A first cross line interconnected to allow hydraulic fluid to flow between the first port of the first damping cylinder and the second port of the second damping cylinder disposed at mutually opposite positions, and the second port of the first damping cylinder and the first It may further comprise a second cross line interconnected such that the hydraulic fluid flows between the first ports of the two damping cylinders.

The embodiment of the present invention can prevent or attenuate the shaking of the lower part of the damping joint device due to the change of the sea condition to the upper part of the damping joint device, and reduce the impact due to the instantaneous overload in the event of extreme shaking. The stability and safety of the lifting device can be improved.

In addition, the embodiment of the present invention can ensure the safety of the mobile harbor and the safety of the lifting device to increase the work efficiency of the mobile harbor at sea.

1 is a perspective view of a standalone container ship according to the prior art.
2 is a block diagram of a damping joint device for a mobile harbor lifting system according to an embodiment of the present invention.
3 is an enlarged cross-sectional view of the circle A shown in FIG. 2.
4 and 5 are cross-sectional views for explaining the operation relationship of the apparatus shown in FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

2 is a block diagram of a damping joint device for a mobile harbor lifting system according to an embodiment of the present invention.

Referring to FIG. 2, the damping joint device for the mobile harbor lifting system according to the present embodiment is used for the lifting system or the lifting device 60 for raising and lowering the crane portion 40 in the floating body 20 of the mobile harbor. It may be the main body 100.

The lifting device 60 lowers the crane part 40 and the main body 100 in a situation such as a predetermined stability securing operation in order to be less affected by the operation, the port, the attitude control, the wind wave of the floating body 20 of the mobile harbor. It is possible to increase the stability, when the cargo loading and unloading operation may be configured by the lifting and lowering actuator structure so that the crane unit 40 and the main body 100 to raise the loading and unloading work with the mother ship.

For example, the lifting system may comprise a control device, a lifting device 60 of a lifting actuator structure, and a hydraulic supply circuit.

The lifting device 60 may include an actuator cylinder block 61 and an operating arm 62 for generating a lifting force based on the hull or floating body 20 of the mobile harbor.

The end of the operating arm 62 of the lifting device 60 may correspond to the upper end of the lifting device 60.

The lifting device 60 may be configured in plural, and the main body 100 of the present embodiment may be installed at the upper end of each lifting device 60.

The main body 100 may include a scaffold 110, a plurality of universal joints 120, and a plurality of damping cylinders 130 having the same capacity.

The scaffold 110 may be coupled to an upper end of the lifting device 60 that lifts and lowers the crane portion 40 from the floating body 20 of the mobile harbor.

The universal joint part 120 may be arranged in plurality in the upper portion of the scaffold 110.

The damping cylinder 130 couples the end of the piston rod 131 to each of the universal joints 120 and connects the end of the cylinder body 132 filled with hydraulic oil to the bottom of the crane portion 40. Can be.

In this embodiment, the working oil refers to a working fluid, and may be a fluid mixed with hydraulic oil and nitrogen gas.

3 is an enlarged cross-sectional view of the circle A shown in FIG. 2.

Referring to FIG. 3, the scaffold 110 has a plurality of inclined surfaces 112 that are inclinedly extended so as to form a shape of upper and lower light on the flat upper surface 111, and the universal joint 120 is inclined. There may be.

In addition, the scaffolding unit 110 may form side surfaces 113 extending vertically downward from the inclined surface 112 and bottom surfaces 114 formed below the side surfaces.

Here, the ball joint groove 115 may be formed at the center of the bottom surface 114 to be engaged with the pivot ball 63 formed at the upper end of the lifting device 60, that is, at the end of the operating arm 62. Can be.

In the present embodiment, the damping cylinders 130, 130a, and 130b may be configured as a total of four before, after, left, and right, or may be configured as a plurality.

In the present embodiment, the damping cylinders 130, 130a, 130b or the universal joint part 120 may be arranged while maintaining the same separation distance d in all directions between the scaffolding part 110 and the crane part 40. have.

In this case, the damping cylinders 130 and 130a or the universal joint portions 120 at opposite positions, that is, opposite positions, may be installed to correspond to a virtual straight line. Herein, the virtual straight line may mean a cross reference line, and the cross reference line may be formed along the pitching or rolling motion direction of the mobile harbor, or the forward direction and line width direction of the mobile harbor may be different. Can be determined along the direction of intersection.

In addition, since the universal joint portion 120 is installed on the inclined surface 112 of the scaffolding portion 110, impact dispersion may be relatively advantageous as compared to the structure installed on a flat surface, and the balancing of the scaffolding portion 110 itself is maintained. May be advantageous.

The universal joint part 120 may be formed as a rotatable connection structure without receiving a moment corresponding to the angle change.

For example, the universal joint portion 120 may be formed in a typical structure that connects the yoke to the needle roller bearing in the cross axial direction.

In addition, the universal joint part 120 may be configured using a hinge pin structure and a spherical bearing.

That is, one side portion of the universal joint part 120 has a hinge pin structure as a lower end of each of the piston rods 131 and 131a of the damping cylinders 130, 130a and 130b, and is coupled to the hinge pin structure. The other portion of the 120 may have a spherical bearing.

The damping cylinders 130 and 130a are provided with first ports 134 and 134a and piston rods 131 and 131a formed to supply or withdraw hydraulic oil to the front side of the pistons 133 and 133a of the piston rods 131 and 131a. It may include a second port (135, 135a) formed for supplying or withdrawing the hydraulic oil on the rear side of the piston (133, 133a), respectively.

In addition, the damping cylinders 130 and 130a flow hydraulic oil between the first port 134 of the first damping cylinder 130 and the second port 135a of the second damping cylinder 130a disposed at mutually opposite positions. It may have a first cross line 136 interconnected to each other.

In addition, the damping cylinders 130 and 130a may have a second cross interconnected to allow hydraulic fluid to flow between the second port 135 of the first damping cylinder 130 and the first port 134a of the second damping cylinder 130a. May have a line 137.

In this case, the damping cylinders 130 and 130a connected to the first and second cross lines 136 and 137 can apply back pressure of the hydraulic oil to each other, thereby enabling counter-balancing operation to perform a stable shock mitigation action. .

Hereinafter, an operation method according to the present embodiment will be described.

4 and 5 are cross-sectional views for explaining the operation relationship of the apparatus shown in FIG.

Referring to FIG. 4, the piston rods 131, 131a of the damping cylinders 130, 130a may be balanced at the same position before or during the operation of the present embodiment.

Referring to FIG. 5, the crane part 40 installed based on the lifting device above the floating body of the mobile harbor affects external forces f1 and f2 such as shaking or impact according to wind load, pitching caused by waves, or rolling motion. The external forces f1 and f2 may be transmitted to the respective piston rods 131 and 131a through the lifting device, the footrest and the universal joint.

For example, if the external force f1 on one side acts upward on the piston rod 131 of the first damping cylinder 130 located on the right side, an unbalanced load may be generated in which the crane part 40 is deflected to the left. .

At the same time, the piston 133 of the first damping cylinder 130 pushes back hydraulic oil.

In this case, the back side hydraulic fluid flows into the front side of the second damping cylinder 130a through the second cross line 137 and moves the piston 133a of the second damping cylinder 130a upward while restoring force or counter force. Can be generated.

The counter force generated in this way and the single load may be attenuated or canceled with each other.

On the contrary, even when the external force f1 on one side acts downward on the piston rod 131 of the first damping cylinder 130 in the opposite direction, the piston 133 of the first damping cylinder 130 receives the front hydraulic fluid. Push out.

Accordingly, the front side hydraulic oil flows into the rear side of the second damping cylinder 130a through the first cross line 136, and as a result, the counter force can also act in the direction of reducing the unloading load.

On the other hand, when the external force f2 on the other side acts upward on the piston rod 131a of the second damping cylinder 130a located on the left side, the crane part 40 may be deflected to be deflected to the right side.

At the same time, the piston 133a of the second damping cylinder 130a pushes back hydraulic oil.

In this case, the back side hydraulic fluid flows into the front side of the first damping cylinder 130 through the first cross line 136 and moves the piston 133 of the first damping cylinder 130 upward while restoring force or counter force. Can be generated.

On the other hand, even if the external force (f2) of the other side acts downward, a counter force that can offset the load in accordance with the same operating principle as described above can be generated in this embodiment.

Therefore, the present embodiment generates counterforces and cancels each time an unbalanced load is generated, so that the shaking of the lower part of the damping joint device such as the external force f1, f2 (for example, the shaking of the lifting device) is moved to the upper part of the device. By preventing transmission, it can reduce the impact of momentary overload in the event of extreme shaking.

Accordingly, the lifting device equipped with the present embodiment can stably move up and down, and moreover, the mobile harbor equipped with the present embodiment and the lifting device can be stably operated or operated.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand. For example, a person skilled in the art can change the material, size and the like of each constituent element depending on the application field or can combine or substitute the embodiments in a form not clearly disclosed in the embodiment of the present invention, Of the range. Therefore, it should be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive, and that such modified embodiments are included in the technical idea described in the claims of the present invention.

100: main body 110: scaffolding
120: universal joint portion 130, 130a, 130b: damping cylinder
136: first cross line 137: second cross line

Claims

Scaffolding portion coupled to the upper end of the lifting device for elevating the crane unit in the mobile harbor,
A plurality of universal joint parts arranged on an upper portion of the scaffolding part;
Comprising: a damping cylinder having a cylinder body filled with hydraulic fluid is coupled to the end of the piston rod, respectively, the universal joint portion,
The scaffolding part,
A plurality of inclined surfaces extending inclined so as to form a shape of upper and lower light on a smooth upper surface, respectively, in which the universal joint part is inclined;
Side surfaces extending vertically downward from the inclined surfaces, respectively;
A bottom surface formed under the side surface,
A ball joint groove formed at the bottom center position to engage with a pivot ball formed at an upper end of the lifting device;
Damping joint device for mobile harbor lifting system.

delete

The method of claim 1,
The damping cylinder,
It is arranged while maintaining the same separation distance in all directions between the scaffolding portion and the crane portion.
Damping joint device for mobile harbor lifting system.

The method according to claim 1 or 3,
The damping cylinder,
A first port formed to supply or withdraw hydraulic oil to the piston front side of the piston rod,
A second port formed to supply or withdraw hydraulic oil to the piston rear side of the piston rod,
A first cross line interconnected to allow hydraulic fluid to flow between a first port of the first damping cylinder and a second port of the second damping cylinder disposed at mutually opposite positions among the damping cylinders;
And a second cross line interconnected to allow hydraulic fluid to flow between the second port of the first damping cylinder and the first port of the second damping cylinder.
Damping joint device for mobile harbor lifting system.