KR20160095446A - Free Fall Type Lifeboat Launching Device whose Davit can fall - Google Patents

Abstract

Provided is a free fall-type lifeboat launching apparatus to launch a lifeboat installed in a ship body, comprising: a top davit fixated on the ship body; a bottom davit having an inclined rail to support the lifeboat; a scissors-shaped lift unit installed in between the top davit and the bottom davit to enable the bottom davit to rise and fall; an elevating/lowering wire whose bottom end unit is fixated on the bottom davit to control the distance of the bottom davits falling; and a winding means to wind the top of the elevating/lowering wire to pull or release it. The apparatus of the present invention is able to reduce the distance of the lifeboats falling by lowering the davit with a guide rail to guide the lifeboat to enter the water before dropping the free fall-type lifeboat and to minimize the impact caused by the lifeboats entering the water.

Description

[0001] The present invention relates to a free fall type lifeboat launching device capable of descending a davit,

[0001] The present invention relates to a free fall type lifeboat launcher capable of lowering a davit, and more particularly, to a lifeboat launcher capable of descending a davit provided with a guide rail for guiding the arrival of a lifeboat, To a free fall type lifeboat launching apparatus capable of lowering the drop height of the lifeboat.

The lifeboat is designed to have sufficient resilience and buoyancy that does not settle even when overturned. The lifeboats are made of wood, steel, and reinforced plastic. There are lifeboats, lifeboats, lifeboats, and lifeboats.

The lifeboat shall be marked in a clear and permanent manner in terms of size, number of vessels, vessels and ports of destination, and all equipment of the lifeboat shall be as small in volume or weight as possible and shall be packed in a suitable and simple form.

Such a lifeboat is stable from an offshore structure in emergency situations by a launching device consisting of a davit, a fall wire, and a release unit while being stably supported on the support structure side of a platform installed on a ship or an offshore structure. To be launched at sea level.

Currently, most lifeboats are totally enclosed lifeboats, and launching systems can be classified into two types. One is a davit launchable universal type lifeboat descending through a wire rope located on either side of the lifeboat and a free fall that allows the lifeboat to fall obliquely through the water Free Fall) type lifeboats.

Among them, the davit launchable system has a disadvantage of slow descending speed because it descends by using a davit winch, but it is possible to arrange it close to the main line and is not limited by the descent height This method is suitable for container ships and the like.

On the other hand, the Free Fall method has a merit that the descent speed is very fast because it is a type that falls directly from the main line to the water surface, but it has a disadvantage of being limited in height. This method is suitable for small ships with a relatively low height, tankers and bulk carriers with little use of sterns.

Free - fall type lifeboats are determined by the lifeboat launcher supporting the launch position and slope. Free-fall system The lifeboat launcher is fixed at a fixed position near the Muster Area, which is usually located in the living quarters of a ship or an offshore structure. It is generally fixed type that can not control the length or tilt of the guide rail .

As an example of such a free-fall type lifeboat launching apparatus, a 'lifeboat intake guide device' has been proposed in the following Patent Document 1, and a 'life boat guide device for a lifeboat' has been proposed in the following Patent Document 2 , The following Patent Document 3 has proposed a 'life boat launching device'.

Korean Registered Patent No. 10-0948272 (Published Mar. 18, 2010) Korean Registered Patent No. 10-1375253 (Published March 19, 2014) Korean Registered Patent No. 10-1387761 (Announcement date April 21, 2014)

Patent Document 1 proposes an intake guide device for a lifeboat for maintaining an intake angle for minimizing an impact on a passenger of a lifeboat when escaping. Patent Document 2 proposes an intake guide device for liferaft However, Patent Literatures 1 and 2 have a disadvantage in that when the free fall type lifeboat is installed at a very high position, the impact reduction effect at the time of getting a lifeboat is not sufficient.

Patent Document 3 proposes a lifting boat launching device capable of absorbing the amount of impact applied to a lifeboat when a lifeboat falls freely from the main line and collides with the sea surface. However, when the lifeboat launching device is exposed to the outside of a floating offshore structure for a long time The first rope or the second rope of the resilient support formed of an elastic material ages and hardens to absorb the amount of impact applied to the lifeboat.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide a free falling device capable of lowering a height of a lifeboat by lowering a davit provided with guide rails for guiding the entry of a lifeboat before dropping a free fall- To provide a lifeboat launcher.

Another object of the present invention is to provide a free fall-type lifeboat capable of being installed at a position higher than the maximum height at which a free-fall lifeboat, which is currently 38.4 m, To provide a lifeboat launcher.

In order to solve the above-mentioned problems, the present invention provides a free-fall liferaft launching device for launching a lifeboat mounted on a hull, comprising: an upper davit fixed to the hull; A lower davit having an inclined rail for supporting the lifeboat; A scissors-type lift unit installed between the upper dibbits and the lower dibbits so that the lower dibbles can be raised and lowered; A lowering wire fixed at a lower end to the lower davit and adjusting a lowering length of the lower davit; And winding means for winding up or loosening the upper side of the lifting / lowering wire.

Here, the winding unit may include a winding drum that winds up or unwinds the upward / downward wire, and a motor that supplies rotational force to the winding drum.

Here, the scissors-type lift portion includes a left multi-stage link; Wherein the left multi-link and the right multi-link are connected by a unit link including two link arms hinged to each other so as to intersect in an 'X' And the lower ends of the two link arms of the upper unit link are rotatably hinged to the upper ends of the two link arms of the lower unit link.

The rotary damper further includes a plurality of hinge portions of the left cascade link and the right cascade link, respectively.

Here, the left multi-stage link may include: a first left multi-stage link installed outside; And a second left multi-stage link provided on the inner side, wherein the right multi-stage link includes: a first right multi-stage link provided outside; And a second right multi-stage link installed on the inner side.

The fixing device may further comprise fixing means for fixing the lower dibbits to the upper dibbles in a state where the scissors type lift portion is folded to the maximum.

According to the free fall lifesaving launching apparatus capable of lowering the davit according to the present invention, the davit provided with the guide rails for guiding the entry of the lifeboats is lowered before dropping the free-fall lifeboats, thereby lowering the drop height of the lifeboats So that the impact at the time of getting a lifeboat can be minimized.

A free-fall lifeboat designed to be used at a relatively low height while being able to be installed at a location higher than the maximum height at which the free-fall lifeboat, currently 38.4 m, can be used can be used, The lifeboat design or selection can be widened.

1 is a side view of a single-lifted free-fall lifesaid launch device according to an embodiment of the present invention;
FIG. 2 is a side view of a free-fall liferaft launching apparatus having a double lift structure according to another embodiment of the present invention;
FIG. 3 is a front view of a free-fall liferaft launching apparatus according to another embodiment of the present invention;
FIG. 4 is a perspective view showing the vicinity of an upper davit of a free-fall lifesaid launch device according to another embodiment of the present invention,
5 is a perspective view showing the vicinity of a lower davit of a free-fall lifesaid launch device according to another embodiment of the present invention,
6 is a perspective view showing a rotary damper provided at a hinge portion of a scissors-type lift portion of a free-fall liferaft launching apparatus of the present invention,
FIG. 7 is a perspective view illustrating a process of lowering a lower davit before dropping a free-fall lifeboat in a free-fall lifeboat launching apparatus according to the present invention.
FIG. 8 is a perspective view showing the vicinity of an upper davit of a free-fall type lifeboat launching apparatus according to another embodiment of the present invention; FIG.

The term 'hull' as used in this specification refers to a marine structure such as a hull of a ship navigating an aqueduct and an FLNG (LNG-FPSO, floating, liquefied natural gas production, storage and unloading facility) do.

In addition, the free-fall lifeboat launching apparatus 1 according to the present invention is also applicable to a life raft. In this specification, 'lifeboat' should be understood to refer also to a liferaft.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the present invention is not limited to the embodiments.

Hereinafter, a configuration of a free fall lifesaving launching apparatus 1 capable of descending a davit according to a preferred embodiment of the present invention will be described.

FIG. 1 is a side view of a single-lift structure free-fall type lifeboat launching apparatus according to an embodiment of the present invention.

According to an embodiment of the present invention, a free falling lifeboat launching apparatus 1 capable of lowering a davit according to the present invention comprises an upper davit 20, a lower davit 30, an upper davit 20, 30; a scissors-type lift portion 40 installed between the scissors-type lift portions 40; A descending wire 80 fixed at the lower end of the lower davit 30 and controlling a descending length of the lower davit 30; And a winding means (90) for pulling or loosening the upper side of the ascending / descending wire (80).

The davit is an arm or the like installed on the hull so that the lifeboat 10 can be suspended. In this embodiment, the upper davit 20 is a part where one side is fixed to the hull, And a scissor-type lift portion 40 is provided on the lower side so as to allow the scissor-type lift portion 40 to be lowered.

The lower davit 30 is raised and lowered at the lower portion of the upper davit 20 by the scissor type lifting portion 40 and is provided with a sloping rail 35 for supporting the lifeboat 10 at the lower portion.

The inclined rail 35 is installed to abut the lifeboat 10 to guide the life of the lifeboat 10. A pair of left and right lifeboats 10 disposed under the lower davit 30 is installed.

Therefore, the lifeboat 10 which is installed so as to be able to be drawn out from the hull is descended by the inclined rail 35 to be obtained.

The height at which the lower davit 30 is raised and lowered is adjusted by the lifting wire 80. The lower end of the lifting wire 80 is fixed to the lower dowel 30 and the upper side of the lifting wire 80 is pulled or pulled by the winding means 90.

This ascending and descending wire 80 is lowered down through a through hole (not shown) formed in the central portion of the upper dice bit 20 to be fixed to the lower dice bit 30, and one ascending / descending wire 80 may be used However, it is preferable that at least two rising wire 80 be arranged side by side in preparation for the risk of breakage.

The winding means 90 includes a winding drum 91 and a motor 92. The winding drum 90 has a function of pulling up or loosening the upper and lower wire 80 so as to move up and down the lower daughter bit 30.

The winding drum 91 has a function of pulling or loosening the upper side of the ascending / descending wire 80, and is installed on the upper side of the upper davit 20.

However, if the upper side of the lifting / lowering wire 80 can be pulled or pulled up by using a pulley or the like, the winding drum 91 may be installed on the hull adjacent to the upper davit 20

1 and 2, the motor 92 is connected to the winding drum 91 via a worm gear or the like to supply rotational force to the winding drum 91. [

Here, when the winding drum 91 is provided on the hull, the motor 92 may also be installed on the hull.

Therefore, the upper side of the ascending / descending wire 80 is pulled up or released by the normal rotation of the motor 92.

Further, a clutch 93 may be further provided between the winding drum 91 and the gear.

Therefore, when the lower davit 30 is to be lowered, the motor 92 may be rotated to lower it at a constant speed, or the gear 93 and the winding drum 91 may be disconnected using the clutch 93, 10 and the lower davit 30 by the weight of the lower davit 30.

Hereinafter, the configuration of the scissor-type lift portion 40 of the free fall liferaft launching apparatus 1 according to the embodiment of the present invention will be described.

6 is a perspective view showing a rotary damper provided on a hinge portion of a scissors-type lift portion of a free-fall liferaft launching apparatus of the present invention.

The scissors-type lift portion 40 is provided between the upper dibbing 20 and the lower dibbing 30 and serves to support the lower dibbing 30 which is raised and lowered from the upper portion of the lower dibbing 30, And includes a link 60 and a right multi-link 70.

Each of the left cascade link 60 and the right cascade link 70 is formed by connecting a plurality of unit links vertically in multiple stages.

The term 'unit link' as used herein refers to the intersection of two link arms 50 in an 'X' shape.

The two link arms 50 constituting such a unit link are rotatably hinged to each other at a portion where they are intersected in an 'X' shape.

The unit links are vertically connected in multiple stages to constitute a left multi-stage link 60 and a right multi-stage link 70. [

That is, the lower ends of the two link arms 50 of the upper unit link are rotatably hinged to the upper ends of the two link arms 50 of the lower unit link.

In this way, a plurality of unit links are vertically connected in a multi-stage manner to form a left multi-stage link 60 and a right multi-stage link 70, and the angle at which the two link arms 50 forming each unit link intersect The total length of the scissor-type lift portion 40 can be varied.

Here, the portions where the link arm 50 constituting the scissor-type lift portion 40 are hinge-coupled are referred to as a hinge portion 55. Although not shown in the drawings, the hinge portions 55 And a rotary damper 57 for generating a damping force at the time of rotation.

The rotary damper 57 is a member connecting the link arm 50 hinged to each other so as to be rotatable (see FIG. 6).

The rotary damper 57 has a structure in which the housing and the hinge shaft of the rotor are axially coupled to each other and the fluid chamber provided in the housing is filled with oil. The hinge shaft of the housing and the rotor Is a known device for absorbing energy by viscous resistance of the oil during relative rotation to attenuate the relative rotational force between the housing and the hinge shaft of the rotor.

The hinge portions 55 of the left multi-stage link 60 and the right multi-stage link 70, which are facing each other, are connected by the connecting shaft 56.

That is, a connecting shaft 56 is provided between the left multi-stage link 60 and the right multi-stage link 70 to connect the opposite hinge portions 55 to each other, The housing portion of the rotary damper 57 protrudes from the left side of the hinge portion 55 of the left multi-stage link 60 and the right side of the hinge portion 55 of the right multi-

When the lower davit 30 is lowered by the weight of the lifeboat 10 and the lower davit 30, the rotary damper 57 is provided on each of the hinge portions 55, Damage to the lifeboat 10 or the scissor-type lift part 40 may be caused by an impact caused by a sudden stop after the lower davit 30 descends or damage to the lifeboat 10, Thereby preventing the risk of injury.

The upper portion of the scissor-type lift portion 40 is engaged with the lower surface of the upper davit 20. The lower portion of the scissor-type lift portion 40 is engaged with the upper surface of the lower davit tooth 30.

Hereinafter, the configuration of the scissor-type lift portion 40 of the free-fall liferaft launching apparatus 1 according to another embodiment of the present invention will be described.

FIG. 2 is a side view of a free-fall liferaft launching apparatus according to another embodiment of the present invention, FIG. 3 is a front view of a free-fall liferaft launching apparatus according to another embodiment of the present invention, FIG. 5 is a perspective view showing the vicinity of a lower davit of a free-fall lifeboat launcher according to another embodiment of the present invention, and FIG. FIG. 7 is a perspective view illustrating a process of lowering a lower davit before dropping a free-fall lifeboat in a free-fall lifeboat launching apparatus according to the present invention, and FIG. 8 is a perspective view showing a free fall-type lifeboat according to another embodiment of the present invention. Fig. 3 is a perspective view showing the upper davit of the launch device.

In the present embodiment, the scissor-type lift portion 40 includes a left multi-stage link 60 and a right multi-stage link 70, the left multi-stage link 60 includes a first left multi- The left multi-stage link 70 includes a first right multi-stage link 70a provided on the outer side and a second right multi-stage link 70b installed on the inner side. do.

That is, the left multi-stage link 60 and the right multi-stage link 70 are constituted by a double lift structure composed of two multi-stage links.

The hinge portions 55 of the second left multi-stage link 60b and the second right multi-stage link 70b, which are opposed to each other, are connected by the connecting shaft 56.

When the scissor-like lift portion 40 is constructed as a double lift structure, the rigidity in the lateral direction is remarkably increased in a state where the length of the scissor-like lift portion 40 is maximally increased as compared with the case where the scissor- It is possible to construct the scissor-like lift portion 40 having a much longer maximum length by using the same link arm 50 as the bar.

The upper portion of the scissor-type lift portion 40 is engaged with the lower surface of the upper davit 20.

At this time, the positions of the fixed ends and the free ends of the first upper left cascade link 60a and the first upper right cascade link 70a and the positions of the free ends of the first left cascade link 60a and the second right cascade link 70b, The positions of the free ends are set at positions opposite to each other.

4, the upper end of one of the link arms 50 at the top of the first left multi-stage link 60a and the first right multi-stage link 70a in the front-rear direction (for example, front) The upper end of the other side (for example, the rear side) is slidably coupled along the horizontal plane of the lower portion of the upper davit 20 by the upper sliding means .

The lower portion of the scissor-type lift portion 40 is engaged with the upper surface of the lower davit 30.

At this time, the positions of the fixed ends and the free ends of the first left multi-stage link 60a and the lowermost first right multi-stage link 70a and the positions of the free ends of the second left multi-stage link 60b and the lowermost fixed stage of the second right multi- The positions of the free ends are set at positions opposite to each other.

5, the lower end of one of the first and second left cascade links 60a and 70a at the lowermost portion of the link arm 50 in the forward and backward directions (for example, forward) The lower end of the other side (for example, the rear side) is slidably coupled along the horizontal plane of the upper portion of the lower davit 30 by the lower sliding means .

The first left multi-stage link 60a and the first right multi-stage link 70a of the scissors-type lift portion 40 are connected to each other by a pair of opposed hinge portions 58 positioned between the uppermost fixed stage and the lowermost fixed stage, Lt; / RTI >

7, when the lower davit 30 is lowered and the length of the scissor-like lift portion 40 is increased, the center lines of the first left multi-stage link 60a and the first right multi-stage link 70a are fixed The center line of the second left multi-stage link 60b and the center line of the second right multi-stage link 70b are moved to the other side (for example, front side) Backward).

Therefore, for the other side (for example, rearward) movement of the second left multi-stage link 60b and the second right multi-stage link 70b, the first left multi-stage link 60a and the first right multi- A member such as the connecting shaft 56 can not be provided between the hinged portions facing each other, but a member located between the uppermost fixed end and the lowermost fixed end of the first left multi-stage link 60a and the first right multi- (Rightmost in FIG. 2) can be connected to each other by a connecting rod 58.

Hereinafter, a process of launching the lifeboat 10 using a free fall type lifeboat launching apparatus 1 capable of descending the davit according to the present invention will be described.

Normally, in the free fall liferaft launching apparatus 1 capable of lowering the davit according to the present invention, the scissor type lifting unit 40 is kept at the maximum folded state.

To this end, fixing means for fixing the lower davit 30 to the upper davit 20 is provided on both sides of the upper davit 20 in a state where the scissor type lift portion 40 is folded to the maximum.

As such fixing means, various known locking devices applicable to large buckles or clamps may be used.

If an accident such as an explosion occurs in the hull, the disaster prevention system of the ship or the floating structure will detect the accident and automatically operate the free fall liferaft launcher (1). If the automatic operation system does not work or the crew is ready to evacuate immediately, the free fall lifeboat launcher 1 may be operated manually.

When the free fall type lifeboat launching apparatus 1 is operated with the crew member aboard the lifeboat 10, the fixing means for fixing the lower davit 30 to the upper davit 20 is released, The coupling 93 between the gear and the winding drum 91 is disconnected, and the lower davit 30 is lowered.

The process of lowering the lower davit 30 using the weight of the lifeboat 10 and the lower davit 30 is shown in FIG.

That is, the length of the scissor-type lift portion 40 is maximized and the height from the water surface of the lower davit 30 is reduced. As a result, the lifeboat 10 below the lower davit 30 falls freely, The condition of the impact can be remarkably reduced.

At this time, the rotary damper 57 is provided on the hinge portions 55 of the left multi-stage link 60 and the right multi-stage link 70 constituting the scissor type lift portion 40, The damage to the lifeboat 10 or the scissor-type lift part 40 may be caused by an impact caused by a sudden stop after the lower davit 30 descends or the passenger boarding the lifeboat 10 may be damaged The danger of being hurt is prevented.

When the lifting of the lower davit 30 is completed, the lifeboat 10 on the slope rail 35 is unfastened so that the lifeboat 10 slides along the slope rail 35 in the same manner as a general free fall lifeboat Thereby causing the lifeboat 10 to fall freely.

The free fall type lifeboat launcher capable of lowering the davit according to the present invention can lower the drop height of the lifeboat by lowering a davit provided with guide rails for guiding the arrival of the lifeboat before dropping the free fall lifeboat There is an advantage that the shock at the time of getting a lifeboat can be minimized.

A free-fall lifeboat designed to be used at a relatively low height while being able to be installed at a location higher than the maximum height at which the free-fall lifeboat, currently 38.4 m, can be used can be used, There is an advantage that the lifeboat design or selection is broadened.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. Accordingly, such modifications or changes should be construed as being included within the scope of the present invention.

1: Free fall-type lifeboat launcher capable of descending davit
10: Lifeboat
20: Upper davit
21: protruding rail at the lower portion of the upper portion of the stator 22: guide groove or slot
30: lower davit 31: protruding rail of the lower davit top
32: guide groove or elongated hole 35: inclined rail
40: scissors-type lift part 50: link arm
51: upper guide bush 52: lower guide bush
53: upper guide roller 54: upper guide rail
55: hinge part 56: connecting shaft
57: rotary damper 58: fastening rod
60: left multistage link
60a: first left multistage link 60b: second left multistage link
70: Right multi-link
70a: first right multi-stage link 70b: second right multi-stage link
80: rising and falling wire
90: Winding means 91: Winding drum
92: motor 93: clutch

Claims (6)

An apparatus for launching a lifeboat (10) mounted on a hull,
An upper davit 20 secured to the hull;
A lower davit 30 having an inclined rail 35 for supporting the lifeboat 10;
A scissor-type lift unit 40 installed between the upper and lower davitbits 30 and 30 so that the lower davit 30 can be raised and lowered;
Descending wire (80) whose lower end is fixed to the lower davit (30) and adjusts the descending length of the lower davit (30); And
And a winding means (90) for hoisting or loosening the upper side of the lifting / lowering wire (80).
The method according to claim 1,
The winding means (90)
A winding drum 91 for winding up or releasing the upper side of the ascending / descending wire 80; And
And a motor (92) for supplying a rotating force to the winding drum (91).
3. The method of claim 2,
The scissor-type lift portion (40)
A left multi-stage link 60; And
And a right multi-stage link (70)
The left multi-stage link 60 and the right multi-stage link 70 are connected to each other by a unit link including two link arms 50, which are hinged to each other so as to be rotatable while being crossed in an 'X' Respectively,
And the lower ends of the two link arms (50) of the upper unit link are rotatably hinged to the upper ends of the two link arms (50) of the lower unit link. The free fall type life- Device.
The method of claim 3,
And a rotary damper (57) provided on the left cascade link (60) and the plurality of hinge parts (55) of the right cascade link (70) Lifeboat launcher.
5. The method of claim 4,
The left multi-stage link (60)
A first left multi-stage link 60a installed on the outside; And
And a second left multi-stage link (60b) provided on the inner side,
The right multi-stage link (70)
A first right multi-stage link 70a installed on the outside; And
And a second right multi-stage link (70b) installed on the inner side of the second right multi-stage link (70b).
6. The method according to any one of claims 1 to 5,
Further comprising fixing means for fixing the lower davit (30) to the upper davit (20) in a state in which the scissor type lift portion (40) is fully folded. Lifeboat launcher.

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