CN117734885A - Marine boarding device - Google Patents
Marine boarding device Download PDFInfo
- Publication number
- CN117734885A CN117734885A CN202311775663.6A CN202311775663A CN117734885A CN 117734885 A CN117734885 A CN 117734885A CN 202311775663 A CN202311775663 A CN 202311775663A CN 117734885 A CN117734885 A CN 117734885A
- Authority
- CN
- China
- Prior art keywords
- lifting
- rope
- ladder
- telescopic
- ship
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004804 winding Methods 0.000 claims abstract description 20
- 238000005096 rolling process Methods 0.000 claims description 15
- 230000009193 crawling Effects 0.000 claims description 2
- 238000007599 discharging Methods 0.000 abstract description 4
- 230000033001 locomotion Effects 0.000 description 12
- 230000002035 prolonged effect Effects 0.000 description 5
- 241000282326 Felis catus Species 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000009194 climbing Effects 0.000 description 3
- 239000013535 sea water Substances 0.000 description 3
- 241001465754 Metazoa Species 0.000 description 2
- 108010066114 cabin-2 Proteins 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Landscapes
- Jib Cranes (AREA)
Abstract
The invention provides an offshore boarding device which comprises a horizontal support frame, a lifting bin, lifting ropes and a winding and unwinding motor, wherein the lifting bin is arranged on the horizontal support frame; the horizontal bracket is supported on a deck of the offshore platform through the upright posts; the receiving and discharging machine is fixed on the horizontal supporting frame and drives the winch to rotate; the top of the lifting bin is provided with a rope rack; one end of the lifting rope is wound on the winch, and the other end of the lifting rope is connected with the rope frame; a plurality of sliding rings are fixed on the outer wall of the lifting bin; a guide rod is connected in the sliding ring in a sliding way; the guide rod is an automatic telescopic rod; the guide rod comprises a fixed pipe, a movable rod and a telescopic driving unit; the fixed pipe is vertically arranged on the horizontal supporting frame; the upper end of the movable rod is arranged in the fixed pipe in a sliding way and is driven by the telescopic driving unit in a telescopic way; the lower end of the movable rod is provided with a deck support piece which can float up and down along with the ship; the telescopic guide rod is convenient for the lifting bin to abut against different ships in a close range for personnel transfer; the deck support can compensate the floating of the ship, so that the guide rod is prevented from being damaged due to frequent collision of the ship.
Description
Technical Field
The invention belongs to the field of offshore boarding, and particularly relates to an offshore boarding device.
Background
Offshore platforms such as an offshore wind power platform, an offshore booster station platform and the like are built on the ocean, and workers are required to go back and forth between the offshore platform and the ship through the equal-taking device. However, in a changeable sea condition environment, the ship is easily affected by wind waves to swing, so that a connecting bridge is difficult to assume between the ship and an offshore platform, and only a cat ladder or a hanging basket can be adopted for boarding. However, the climbing ladder has higher physical quality requirements on boarding personnel, is extremely easy to fall off in high altitude and has higher danger; although the hanging basket has no requirement on the physical quality of climbing personnel, the hanging basket is easily influenced by strong wind to shake back and forth in the lifting process, and the possibility that the climbing personnel are thrown out exists.
The invention patent with the application number of 202010255596.5 discloses a boarding device for an ocean platform, which guides and limits the lifting of a lifting cabin by arranging a guide rod and a sliding seat so as to increase the lifting stability and lifting safety of the lifting cabin; however, the lifting stroke of the lifting bin can be influenced by the length of the guide rod, so that the lifting bin is unfavorable for meeting boarding requirements of ships with different sizes.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide an offshore boarding device to meet the smooth boarding demands of vessels of different sizes.
To achieve the above and other related objects, the present invention provides an offshore boarding device, comprising a horizontal support frame, a lifting bin, a lifting rope, a winch and a winding and unwinding motor; the horizontal bracket is supported on a deck of the offshore platform through the upright posts; the receiving and discharging machine is fixed on the horizontal support frame and drives the winch to rotate; a rope rack is fixed at the top of the lifting bin; one end of the lifting rope is wound on the winch, and the other end of the lifting rope is fixedly connected with the rope frame; a plurality of sliding rings are fixed on the outer wall of the lifting bin; a guide rod is connected in the sliding ring in a sliding way; the guide rod is an automatic telescopic rod; the guide rod comprises a fixed pipe, a movable rod and a telescopic driving unit; the fixed pipe is vertically arranged on the horizontal supporting frame; the upper end of the movable rod is arranged in the fixed pipe in a sliding way and is driven by the telescopic driving unit in a telescopic way; the lower end of the movable rod is provided with a deck support piece which can float up and down along with the ship; because the guide rod is an automatic telescopic rod, a boarding personnel can conveniently adjust the telescopic length of the guide rod according to the height position of the deck of the ship, so that the lifting bin can be ensured to stably butt against the ship for personnel transfer; the deck support piece can float up and down along with the ship to compensate floating, so that the guide rod is effectively prevented from being damaged due to frequent collision of the ship.
Preferably, the deck support comprises a ball seat and a ball rotatably disposed within the ball seat; the ball body extends out from the lower part of the ball seat to be in rolling contact with a ship deck of a ship, so that impact of ship rolling and pitching on the guide rod is reduced, and the service life of the guide rod is ensured.
Preferably, the telescopic driving unit is a linear motor or an air cylinder or a hydraulic push rod; the top of deck support piece is equipped with the floating rod, the upper end activity of floating rod sets up in the movable rod.
Preferably, the telescopic driving unit comprises a traction motor, a winding wheel and a traction rope; the winding wheel is fixedly connected with a motor shaft of the traction motor; one end of the traction rope is wound on the winding wheel, and the other end of the traction rope stretches into the fixed pipe to be fixedly connected with the movable rod.
Preferably, a fence is arranged on the lifting bin, and an entrance is formed between the head end and the tail end of the fence.
Preferably, the entrance is provided with a cat ladder, so that passengers can conveniently enter and exit the lifting bin smoothly.
Preferably, the ladder stand is a telescopic ladder stand; the telescopic crawling ladder comprises a fixed ladder and a movable ladder arranged on the fixed ladder in a sliding manner; the bottom of the movable ladder is provided with a ball seat, and a ball body in rolling contact with a ship deck is arranged in the ball seat; the floating, rolling and pitching movements of the ship are compensated through the up-and-down floating of the movable ladder and the rolling of the ball body, so that the ladder is prevented from being broken due to the impact of the ship movements on the ladder.
Preferably, the telescopic ladder comprises a shrinkage locking piece for locking the movable ladder in a shrinkage state, so that the movable ladder is prevented from being broken by strong wind when the lifting cabin moves up and down.
As described above, the offshore boarding device provided by the invention has the following beneficial effects:
according to the offshore boarding device, the sliding ring and the telescopic guide rod are adopted to limit the shaking of the lifting bin in the lifting process, so that the lifting stability of the lifting bin is ensured; the length of the guide rod is adjustable, so that stable butt joint of the deck surfaces of different ships is conveniently met, the risk of corrosion of the guide rod by seawater is reduced, and the service life of the guide rod is prolonged; in addition, the deck support piece which can be fluctuated up and down along with the ship adopts a spherical hinge structure, the rolling contact between a sphere in the spherical hinge structure and a ship deck is utilized to eliminate the motion impact of the ship on the guide rod, and the service life of the guide rod is prolonged.
Drawings
Fig. 1 is a perspective view of an offshore boarding device.
Fig. 2 is a side view of the offshore boarding device.
Fig. 3 is a schematic view of the guide bar mounted on a horizontal support frame.
Fig. 4 is a schematic structural view of the lifting bin.
Fig. 5 is a schematic diagram of the cooperation of the ball seat and the ball body.
Fig. 6 is a schematic diagram of connection between the telescopic driving unit and the movable rod in an embodiment.
Description of the reference numerals
Offshore platform 01, ship 02, ship deck 021, horizontal support frame 1, stand 11, link 12, lift bin 2, rope frame 21, slip ring 22, rail 23, winding and unwinding motor 3, lift rope 4, guide rod 5, fixed rod 51, movable rod 52, traction motor 53, traction rope 54, deck support 6, ball seat 61, sphere 62, cat ladder 7.
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present invention, which is described by the following specific examples.
Please refer to fig. 1 to 6. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the invention to the extent that it can be practiced, since modifications, changes in the proportions, or otherwise, used in the practice of the invention, are not intended to be critical to the essential characteristics of the invention, but are intended to fall within the spirit and scope of the invention. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the invention, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the invention may be practiced.
Example 1
As shown in fig. 1 to 5, the offshore boarding device according to the present embodiment is used for realizing the transfer of personnel between an offshore platform 01 and a ship 02; the offshore boarding device comprises a horizontal support frame 1, a lifting bin 2, a lifting rope 4, a winch and a winding and unwinding motor 3; the horizontal support frame 1 is supported on a deck of the offshore platform 01 through a column 11, and an opening for the lifting bin 2 to pass through is formed in the deck of the offshore platform 01; the winding and unwinding motor 3 is fixed on the horizontal support frame 1 and drives the winch to rotate; a rope frame 21 is fixed at the top of the lifting bin 2, one end of the lifting rope 4 is wound on a winch, and the other end of the lifting rope 4 is fixedly connected with the rope frame 21; a plurality of sliding rings 22 are fixed on the outer wall of the lifting bin 2; a guide rod 5 is connected in a sliding way in the sliding ring 22; the guide rod 5 is an automatic telescopic rod and comprises a fixed pipe 51, a movable rod 52 and a telescopic driving unit; wherein, the fixed tube 51 is vertically installed on the horizontal support frame 1 through the connecting frame 12, the upper end of the movable rod 52 is slidably arranged in the fixed tube 51, and is driven by the telescopic driving unit to extend and retract; when people are required to be transported, the guide rod 5 is required to be stretched to the ship deck 021, and the stable lifting of the people is realized by utilizing the lifting bin 2 so as to convey the people between the ship deck 021 and a deck of the offshore platform 01; the extension length of the guide rod 5 can be adjusted according to the actual condition of the ship 02, so that the limit of the traditional fixed length guide rod 5 on the lifting stroke of the lifting cabin 2 is effectively overcome, the lifting cabin 2 can be stably docked with the ship decks 021 of different ships 02 in a short distance, and the safety of personnel boarding or disembarking the ship is ensured; in addition, since the ship 02 is subjected to the wave to have a floating and sinking motion, in order to prevent the ship 02 from repeatedly impacting the guide bar 5 in the vertical direction, the guide bar 5 is damaged, and a deck support 6 which can float up and down along with the ship 02 is provided at the lower end of the movable bar 52.
It will be appreciated that the retraction motor 3 and the telescopic drive unit may be controlled wirelessly by personnel on the vessel 02 using a wireless remote control device, or by offshore platform 01 personnel using control means such as control buttons.
When a person on the ship 02 needs to be transported to the offshore platform 01, the ship 02 needs to be moved to the position right below the offshore boarding device; then controlling the extension of each guide rod 5 until the deck support 6 at the lower end of each guide rod 5 is in contact with the deck 021 of the ship, and the floating and sinking amplitude of the ship 02 is required to be in the up-and-down floating travel of the deck support 6; then, the winch is driven by the receiving and discharging machine 3 to rotate forward so as to release the lifting rope 4, and the lifting bin 2 moves downwards to a position at a first preset height from the ship deck 021 under the action of gravity, so that personnel on the ship conveniently and safely enter the lifting bin 2; then the winding and unwinding motor 3 drives the winch to rotate reversely to retract the lifting rope 4, so that the lifting bin 2 moves upwards under the traction of the lifting rope 4 until the bottom of the lifting bin 2 is flush with the upper surface of the deck of the offshore platform 01, and personnel in the lifting bin 2 can conveniently enter the offshore platform 01; finally, the guide rod 5 is shortened, so that the seawater is effectively prevented from rising to contact and corroding the guide rod 5, and the service life of the guide rod 5 is prolonged; at the same time, the shortened guide rod 5 is not easy to be broken by the marine ship or the large aquatic animal.
When a person on the offshore platform 01 needs to be transported to the ship 02, the ship 02 needs to be moved to the position right below the offshore boarding device; then controlling each guide rod 5 to extend until a deck support 6 at the lower end of each guide rod 5 is in contact with a ship deck 021, wherein the up-down floating amplitude of the deck support 6 is larger than the floating and sinking amplitude of the ship 02; then, allowing a person to enter the lifting bin 2, and enabling the receiving and discharging machine 3 to drive the winch to rotate forward so as to release the lifting rope 4, so that the lifting bin 2 moves downwards to a position at a first preset height from the ship deck 021 under the action of gravity, and the person in the lifting bin 2 can conveniently move onto the ship deck 021; then the winding and unwinding motor 3 drives the winch to rotate reversely to retract the lifting rope 4, so that the lifting bin 2 moves upwards to the deck of the offshore platform 01 under the traction of the lifting rope 4, and the lifting bin 2 is conveniently and stably placed on the deck of the offshore platform 01; finally, the guide rod 5 is shortened, so that the seawater is effectively prevented from rising to contact and corroding the guide rod 5, and the service life of the guide rod 5 is prolonged; at the same time, the shortened guide rod 5 is not easy to be broken by the marine ship or the large aquatic animal.
Since the ship 02 is affected by wind and waves, it may have rolling and pitching motions in addition to the floating and sinking motions; the rolling and/or pitching vessel 02 repeatedly impacts the deck supports 6, making it very easy for the guide bars 5 to bend and break; to ensure the service life of the guide bar 5, as shown in fig. 5, the deck support 6 may be in a ball-and-socket structure including a ball seat 61 and a ball 62 rotatably disposed in the ball seat 61; the ball 62 needs to protrude from below the ball seat 61 to be in rolling contact with the deck 021 of the vessel 02 to reduce or avoid impact of the vessel 02 on the deck support 6, thereby ensuring the service life of the guide rod 5.
Preferably, as shown in fig. 6, the telescopic driving unit includes a pulling motor 53, a winding wheel and a pulling rope 54; wherein, the winding wheel is fixedly connected with the motor shaft of the traction motor 53; one end of the traction rope 54 is wound on the winding wheel, and the other end of the traction rope 54 stretches into the fixed pipe 51 to be fixedly connected with the movable rod 52; the movable rod 52 can be controlled to move up and down by winding or releasing the traction rope 54 by the winding wheel, so that the aim of adjusting the length of the guide rod 5 is fulfilled; since the pulling rope 54 is in a loose state, the movable rod 52 can float up and down in the fixed pipe 51, and therefore the ball seat 61 of the deck support 6 can be directly fixedly connected with the lower end of the movable rod 52; thus, when the guide bar 5 is extended to the point where the deck support 6 is in contact with the deck 021 of the vessel, the take-up reel is required to release a part of the pulling rope 54 so that the movable bar 52 can float up and down following the sinking of the vessel 02.
In order to ensure the safety of the personnel in the lifting bin 2, as shown in fig. 4, a rail 23 is required to be arranged on the lifting bin 2, and a gap is formed between the head end and the tail end of the rail 23 to form an entrance for the personnel to enter and exit; in this embodiment, in order to avoid personnel falling from the doorway, the doorway may be blocked by a chain.
Example two
The difference between this embodiment and the first embodiment is only that: the structure of the telescopic driving unit is replaced by a linear driving device which can carry out rigid transmission with the movable rod 52, such as a motor lead screw, a pneumatic push rod, a hydraulic rod, a linear motor and the like; at this time, a floating rod in sliding fit with the movable rod 52 is additionally arranged on the top of the ball seat 61 of the deck support 6, and compensation for floating and sinking movements of the ship 02 is realized by utilizing the sliding fit of the floating rod and the movable rod 52. So as to avoid the movable rod 52 from being repeatedly impacted in the vertical direction to damage the telescopic driving unit.
Example III
The difference between this embodiment and the first or second embodiment is only that: a ladder 7 is provided at the doorway.
In order to reduce or avoid the shock of the ladder 7 from the ship movement during the use, the ladder 7 is preferably an existing telescopic ladder, which comprises a fixed ladder and a movable ladder slidingly arranged on the fixed ladder; the upper end of the fixed ladder is fixedly connected with the lifting bin 2, the bottom of the movable ladder is provided with a ball seat 61, and a ball 62 in rolling contact with a ship deck 021 is arranged in the ball seat 61; the motions of the ship are compensated by the rolling of the ball 62 and the up-and-down floating of the movable ladder, so that the cat ladder 7 is prevented from being damaged due to frequent impact of the moving ship.
Further, the telescopic ladder comprises a retraction lock for locking the ramp in the retracted state. The contraction locking member may be any member capable of locking the position of the movable ladder and the fixed ladder, such as a binding rope or a locking pin, and is not limited thereto, and the binding rope is preferably selected in this embodiment.
According to the offshore boarding device, the length of the guide rod 5 can be adjusted according to different ship conditions, so that the lifting bin 2 can be stably and closely butted with different ship decks 021; in addition, the deck support 6 floating up and down adopts a spherical hinge structure, so that not only can the floating and sinking movement of the ship be compensated, but also the rolling and/or pitching movement of the ship can be compensated by utilizing the rolling of the ball 62 on the deck 021 of the ship, the guide rod 5 is effectively prevented from being broken and invalid due to the impact of the movement of the ship, and the service life of the guide rod 5 is prolonged; the offshore boarding device can meet boarding requirements of different ships, and has wide application prospects.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (8)
1. An offshore boarding device comprises a horizontal support frame (1), a lifting bin (2), a lifting rope (4), a winch and a winding and unwinding motor (3); the horizontal support frame (1) is supported on a deck of the offshore platform (01) through a stand column (11); the winding and unwinding motor (3) is fixed on the horizontal support frame (1) and drives the winch to rotate; a rope rack (21) is fixed at the top of the lifting bin (2); one end of the lifting rope (4) is wound on the winch, and the other end of the lifting rope (4) is fixedly connected with the rope frame (21); a plurality of sliding rings (22) are fixed on the outer wall of the lifting bin (2); a guide rod (5) is connected in a sliding way in the sliding ring (22); the device is characterized in that the guide rod (5) is an automatic telescopic rod; the guide rod (5) comprises a fixed pipe (51), a movable rod (52) and a telescopic driving unit; the fixed pipe (51) is vertically arranged on the horizontal support frame (1); the upper end of the movable rod (52) is arranged in the fixed pipe (51) in a sliding way and is driven by a telescopic driving unit in a telescopic way; the lower end of the movable rod (52) is provided with a deck support (6) which can float up and down along with the ship (02).
2. An offshore boarding device according to claim 1, characterized in that the deck support (6) comprises a ball seat (61) and a ball (62) rotatably arranged in the ball seat (61); the ball (62) protrudes from below the ball seat (61) to be in rolling contact with the deck (021) of the vessel (02).
3. An offshore boarding device according to claim 1 or 2, wherein the telescopic drive unit is a linear motor or a cylinder or a hydraulic ram; the top of the deck support (6) is provided with a floating rod, and the upper end of the floating rod is movably arranged in the movable rod (52).
4. An offshore boarding device according to claim 1 or 2, wherein the telescopic drive unit comprises a traction motor (53), a winding wheel and a traction rope (54); the winding wheel is fixedly connected with a motor shaft of the traction motor (53); one end of the traction rope (54) is wound on the winding wheel, and the other end of the traction rope (54) stretches into the fixed pipe (51) to be fixedly connected with the movable rod (52).
5. An offshore boarding device according to claim 1, wherein a fence (23) is arranged on the lifting bin (2), and an entrance is formed between the head end and the tail end of the fence (23).
6. Offshore boarding device of claim 5, wherein a ladder (7) is provided at the entrance.
7. Offshore boarding device according to claim 6, wherein the ladder (7) is a telescopic ladder; the telescopic crawling ladder comprises a fixed ladder and a movable ladder arranged on the fixed ladder in a sliding manner; the bottom of the movable ladder is provided with a ball seat (61), and a ball body (62) in rolling contact with a ship deck (021) is arranged in the ball seat (61).
8. An offshore boarding device in accordance with claim 7, wherein the telescoping ladder includes a retraction lock that locks the ramp in the retracted state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311775663.6A CN117734885A (en) | 2023-12-22 | 2023-12-22 | Marine boarding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311775663.6A CN117734885A (en) | 2023-12-22 | 2023-12-22 | Marine boarding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117734885A true CN117734885A (en) | 2024-03-22 |
Family
ID=90279130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311775663.6A Pending CN117734885A (en) | 2023-12-22 | 2023-12-22 | Marine boarding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117734885A (en) |
-
2023
- 2023-12-22 CN CN202311775663.6A patent/CN117734885A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2625092B1 (en) | A gangway construction having a guiding assembly with pulley wheels and guiding cables | |
| NL2006710C2 (en) | A system and method for designating a floating vessel against a stationary object. | |
| FI84248C (en) | Offshore load handling systems | |
| CA2644285A1 (en) | Large scale watercraft storage system | |
| JP2960872B2 (en) | Boat lifting equipment | |
| CN117734885A (en) | Marine boarding device | |
| EP2218671A1 (en) | Device for transferring objects at sea | |
| WO2010147478A1 (en) | Device and method for transferring crew and personell between vessels and offshore structures | |
| CN115092723B (en) | Ship transportation channel, marine transportation ship and ship transportation channel construction method | |
| CN214270025U (en) | Supporting platform and container loading and unloading equipment | |
| US5941192A (en) | Ship borne lifts for tenders and methods for using same | |
| NL2008207C2 (en) | A method of providing access between a floating vessel and a marine structure. | |
| CN114408761A (en) | Navigation mark recycling and hoisting device and method | |
| CN210768566U (en) | Marine anti-wave tower climbing ladder | |
| CN110382345B (en) | Ship transfer system | |
| CN107873598B (en) | Guiding mooring unit in marine culture system | |
| TW202108444A (en) | Marine transfer apparatus and method of using the same | |
| CN114671359B (en) | Marine hoisting equipment with intelligent compensation anti-inclination function | |
| CN219192504U (en) | Quick transfer device of marine vessel | |
| CN212149212U (en) | Translational telescopic accommodation ladder structure | |
| CN214029058U (en) | Working boat slideway winding and unwinding device | |
| CN210175085U (en) | Automatic receive and release navigation mark ship and step on and take advantage of ladder | |
| CN220032162U (en) | Slide type recovery device of high sea condition fishing robot | |
| CN112551385B (en) | Wharf loading and unloading equipment | |
| CN117566041A (en) | Life raft boarding device suitable for multi-deck of large ship and use method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |