A telescopic gangway with adjustable outward swing angle

Abstract

The present invention provides a retractable gangway with adjustable outward swing angle. The present invention includes an upper ladder frame, a lower ladder frame, an electric winch, an upper platform, a telescopic boom, steps, a tipping winch, a transmission pipe, and a column device. Steps are provided on both the upper ladder frame and the lower ladder frame. The upper platform is a rotary platform, one end of which is connected to the upper ladder frame, the other end is connected to the transmission pipe, and the other end of the transmission pipe is connected to the telescopic boom. The lower ladder frame is installed in the upper ladder frame through a transmission device. An electric winch is arranged on the upper platform and is connected to the transmission device for adjusting the position of the lower ladder frame in the upper ladder frame so that the gangway can be used as a retractable gangway; the tipping winch uses a steel wire rope to connect the upper ladder frame after passing through the column device and the telescopic boom for the tipping and lowering / recovery of the gangway; the telescopic boom completes swinging the gangway outward around the axis of the rotary platform by a certain angle outside the ship through the adjustment of the telescopic amount. The present invention has good applicability to ships with a severely contracted stern profile.

Description

Technical Field

[0001] The present invention relates to the technical field of shipbuilding, and in particular to a retractable gangway with adjustable swing angle. Background Art

[0002] With the continuous development of shipbuilding technology, ships are becoming larger and larger. In order to obtain better ship performance, the stern lines of ships contract significantly, and most of the living areas of ships are located in the stern area. Since the gangway is required to be arranged as close as possible to the living area to facilitate crew boarding and disembarking, most gangways are arranged at the position where the stern lines contract. Currently, most gangway ladders are integrated and are usually arranged at the stern of the ship. When the gangway is stored, it occupies a large space, and it is difficult to arrange the gangway for ships with narrow stern areas. At the same time, the contraction of the stern lines results in that conventional gangways cannot meet the actual needs of boarding and disembarking the ship, and it is often necessary to use a dock ladder or a gangplank at the dock. When the tide rises and falls greatly, the use of ordinary gangways is significantly restricted. Therefore, there is an urgent need for a retractable ladder with an adjustable swing angle to greatly reduce the occurrence of the above situations. Summary of the Invention

[0003] In view of the above technical problems, a retractable gangway with an adjustable swing angle is provided. The technical means adopted by the present invention are as follows:

[0004] A retractable gangway with an adjustable swing angle includes an upper ladder, a lower ladder, an electric winch, an upper platform, a telescopic boom, steps, a flipping winch, a transmission pipe, and a column device. Steps are provided on both the upper ladder and the lower ladder. The upper platform is a rotary platform, one end of which is connected to the upper ladder and the other end is connected to the transmission pipe. The other end of the transmission pipe is connected to the telescopic boom. The lower ladder is installed in the upper ladder through a transmission device. The electric winch is provided on the upper platform and is connected to the transmission device to adjust the position of the lower ladder in the upper ladder so that the gangway can be used as a retractable gangway. The flipping winch uses a steel wire rope to connect to the upper ladder after passing through the column device and the telescopic boom for the flipping and lowering / recovery of the gangway. The telescopic boom completes swinging the gangway outwards around the rotary platform by adjusting the telescopic amount at a certain angle.

[0005] Furthermore, a fastening device is further included. After the lower ladder is retracted, the ladder and the upper platform are erected as a whole and are tied and fixed through the fastening device. The fastening device and the lower part of the column device are both installed on the deck.

[0006] Furthermore, the transmission device includes an upper ladder frame pulley set, a lower ladder frame pulley, and rollers. The lower ladder frame is sleeved inside the upper ladder frame through two axial slideways, and the lower ladder frame moves on the slideways of the upper ladder frame through the rollers. The lower ladder frame is connected to the electric winch through the upper ladder frame pulley set, the lower ladder frame pulley, and the pulley group steel wire rope. By the forward / reverse rotation of the electric winch, the lower ladder frame is driven to extend / retract.

[0007] Furthermore, the electric winch is provided with a check device.

[0008] Furthermore, the upper ladder frame is provided with a flip step and a flip step limit, and the lower ladder frame is provided with a fixed step. During the lowering process of the lower ladder frame, due to the different positions of the center of gravity and the rotation center, the flip step can naturally flip around the fixed axis under the action of gravity. The flip step limit is used to limit the flipping angle of the flip step. When the lower ladder frame is retracted, the flip step is pushed by the lower ladder frame to flip.

[0009] Furthermore, the electric winch is placed on the protruding platform of the rotating part of the upper platform and can rotate together with the upper platform.

[0010] Furthermore, the telescopic jib is a hydraulic structure, and the fixed jib and the movable jib are connected inside through a hydraulic cylinder, and the movable jib is pushed out through the hydraulic cylinder.

[0011] The present invention greatly reduces the storage area occupied by the accommodation ladder on the deck, increases the utilization rate of the ship deck, and has good applicability for ships with limited deck space, narrow passage space, especially ships with a severely contracting stern line. When the ship is moored at the dock, due to the contraction of the stern line, ordinary accommodation ladders often need to be paired with dock ladders or pedals to achieve crew boarding, but this may require the use of dock cranes, which is costly. Especially for docks with a large tidal range, the distance between the ship deck and the dock changes significantly, and ordinary accommodation ladders can only be used at a certain water level, which has certain limitations. The present invention can adapt to different dock conditions, can swing the accommodation ladder outwards at a certain angle while the accommodation ladder can be telescoped, and can greatly avoid the occurrence of such events and reduce the cost of using dock cranes. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0013] Figure 1 It is a top view of the accommodation ladder of the present invention after being laid down with a certain outward swing angle.

[0014] Figure 2 This is the front view of the present invention in the storage state.

[0015] Figure 3 This is a schematic diagram of the connection structure of the upper ladder and the lower ladder of the present invention.

[0016] Figure 4 is Figure 3 An enlarged view of the step part.

[0017] In the figure: 1. Upper ladder, 2. Lower ladder, 3. Transmission device, 31. Upper ladder pulley group, 32. Lower ladder pulley, 33. Roller, 4. Electric winch, 5. Upper platform, 6. Telescopic boom, 61. Fixed boom, 62. Movable boom, 7. Step, 71. Fixed step, 72. Flipping step, 73. Step rotation shaft, 8. Flipping step limit, 9. Flipping winch, 10. Transmission pipe, 11. Fastening device, 12. Column device. Specific embodiments

[0018] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] Such as Figures 1 to 3As shown in the figure, an embodiment of the present invention discloses a retractable gangway with adjustable outward swing angle, which includes an upper ladder frame 1, a lower ladder frame 2, an electric winch 4, an upper platform 5, a telescopic boom 6, steps 7, a tipping winch 9, a transmission pipe 10 and a column device 12. Steps 7 are provided on both the upper ladder frame 1 and the lower ladder frame 2. The upper platform 5 is a rotary platform, one end of which is connected to the upper ladder frame 1 and the other end is connected to the transmission pipe 10. The other end of the transmission pipe 10 is connected to the telescopic boom 6. The lower ladder frame 2 is installed in the upper ladder frame 1 through a transmission device 3. The electric winch 4 is arranged on the upper platform 5 and is connected to the lower ladder frame through the transmission device 3, which is used to adjust the position of the lower ladder frame 2 in the upper ladder frame 1 so that the gangway can be used as a retractable gangway. The gangway is retractable, and the storage length is reduced, which reduces the storage space of the gangway and greatly reduces the occupied deck space, facilitating the layout on the ship. The tipping winch 9 uses a steel wire rope to be connected to the upper ladder frame 1 after passing through the column device 12 and the telescopic boom 6, which is used for the tipping and lowering / recovery of the gangway. Specifically, it can pass through the pulleys (or other guiding devices) provided on the column device 12 and the telescopic boom 6. The telescopic boom 6 completes the outward swing of the gangway around the axis of the rotary platform by adjusting the telescopic amount. The outward swing angle and length of the gangway are adjustable, and there is no need to match a dock ladder or a pedal, which can better adapt to different dock conditions.

[0020] As an optional implementation method, it further includes a fastening device 11. After the lower ladder frame 2 is retracted (that is, Figure 1 in the process of the lower ladder frame moving from the outside of the ship to the side of the ship's deck), the ladder frame and the upper platform 5 are erected as a whole, and then the entire ladder frame is tied to the fastening device 11 using tying parts (usually tying hooks or steel wire ropes for the gangway). The fastening device 11 and the lower part of the column device 12 are both installed on the deck.

[0021] As a preferred implementation method, the transmission device 3 includes an upper ladder frame pulley group 31, a lower ladder frame pulley 32 and rollers 33. The electric winch 4 is connected to the pulley group steel wire rope. The lower ladder frame 2 is sleeved in the upper ladder frame 1 through two axial slideways. The lower ladder frame 2 moves in the slideway of the upper ladder frame 1 driven by the electric winch 4 through the rollers 33. The upper ladder frame 1 is provided with two slideways, and the lower ladder frame 2 is sleeved in the slideway of the upper ladder frame 1. Rollers 33 are provided in the slideway to facilitate sliding. Two lower ladder frame pulleys 32 are respectively arranged on both sides of the upper part of the lower ladder frame 2, forming a movable pulley effect with the whole lower ladder frame 2. Pulley groups are respectively arranged on the upper and lower parts of the upper ladder frame 1 to form the upper ladder frame pulley group 31, which plays a guiding role for the pulley group steel wire rope. The steel wire rope passes through the upper ladder frame pulley group 31 to connect the drum of the electric winch 4 and the lower ladder frame 2. The forward / reverse rotation of the electric winch 4 completes the telescoping / retraction of the lower ladder frame 2. The electric winch 4 is provided with a check device.

[0022] As a preferred embodiment, the upper ladder frame 1 is provided with a flip step 72 and a flip step limit 8, and the lower ladder frame 2 is provided with a fixed step 71. The cooperation of the two effectively reduces the overall height of the ladder frame nesting and further reduces the occupation of the deck space. During the lowering process of the lower ladder frame, due to the different positions of the center of gravity and the rotation center, the flip step 72 can naturally flip around the axis under the action of gravity. The flip step limit 8 is used to limit the flip angle of the flip step. When the lower ladder frame is retracted, the flip step is pushed by the lower ladder frame to flip, and this setting method can facilitate the telescopic storage of the ladder frame. Specifically, as Figure 4 shown, the flip step 72 is located on the upper ladder frame 1. There are two protruding step rotation shafts 73 on both sides of the flip step 72. The step rotation shafts 73 pass through both sides of the upper ladder frame 1. When the lower ladder frame 2 is lowered, due to the different positions of the center of gravity and the step rotation shaft, the step flips. When the ladder frame is placed horizontally, the rotation center of the flip step is lower than the center of gravity. In this way, during the lowering process of the lower ladder frame, the flip step 72 can naturally flip under the action of gravity. The flip step limit 8 has the same width as the upper ladder frame 1 and is welded to the structures on both sides of the upper ladder frame 1, which not only limits the flip angle of the flip step 72 but also strengthens the upper ladder frame. When the lower ladder frame 2 is retracted, the flip step 72 is pushed by the lower ladder frame 2 to flip, which is convenient for the lower ladder frame 2 to retract.

[0023] The electric winch 4 is placed on the protruding platform of the rotating part of the upper platform 5 and can rotate together with the upper platform 5.

[0024] The telescopic boom 6 is a hydraulic structure. Inside, the fixed boom 61 and the movable boom 62 are connected by a hydraulic cylinder, and the movable boom 62 is pushed out by the hydraulic cylinder.

[0025] The specific application process of this embodiment is as follows:

[0026] During the specific use process of this embodiment, it includes four execution actions: flipping / swinging out / lowering / telescoping.

[0027] The flipping action is controlled by the flip winch 9. When in use, the telescopic boom 6 and the upper platform 5 connected by the transmission pipe flip under the action of gravity;

[0028] For the swinging out action, the telescopic boom 6 changes the swinging out angle of the gangway by adjusting the telescopic amount;

[0029] For the lowering action, the flip winch 9 pays out the steel wire rope, and the ladder frame rotates along the connection with the upper platform and tilts towards the sea until the preset angle;

[0030] For the telescopic action of the lower ladder frame: The electric winch 4 pays out the lower ladder frame through the wire rope of the pulley block to complete the adjustment of the telescopic amount of the gangway.

[0031] Specifically, in the tied state, the telescopic boom 6 is vertically arranged with the ladder frame and the upper platform 5. When in use, it first falls down together with the gangway under the action of gravity, and then the outer swing angle of the gangway can be changed by adjusting the telescopic distance of the telescopic boom 6. After the gangway is lowered by a certain angle, the telescopic amount of the lower ladder frame is controlled by the electric winch 4 to achieve the required use length.

[0032] Specifically, when the gangway needs to be lowered, the tying and fixing between the ladder frame and the fastening device 11 is released, and the steel wire rope is released by the flipping winch 9. Under the action of gravity, the telescopic boom 6 and the upper platform 5 connected on both sides of the transmission pipe 10 drive the entire gangway to fall outside the ship and extend horizontally outside the ship. Operate the hydraulic mechanism of the telescopic boom 6 to slowly push out the movable boom 62 to reach the required outer swing angle. Operate the flipping winch 9 to release the steel wire rope again to lower the gangway to the required angle, and release the steel wire rope through the electric winch 4. Under the action of gravity, the lower ladder frame 2 moves out of the upper ladder frame 1 until the required length is reached;

[0033] When the gangway needs to be retracted, the steel wire rope is retracted by the electric winch 4 to retract the lower ladder frame 2 into the upper ladder frame 1. The movable boom 62 is retracted by the hydraulic mechanism of the telescopic boom 6, and then the flipping winch 9 tightens the steel wire rope to retract the ladder frame. After the end of the upper ladder frame close to the lower ladder frame touches the telescopic boom 6, continue to tighten, driving the telescopic boom 6 to rotate along the transmission pipe 10 together. When the telescopic boom 6 touches the limiter of the column device 12, stop moving, and then use the fastening device 11 for tying.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A retractable gangway with adjustable outward swing angle, characterized in that, It includes an upper ladder frame, a lower ladder frame, an electric winch, an upper platform, a telescopic jib, steps, a tipping winch, a transmission pipe and a column device. Steps are provided on both the upper ladder frame and the lower ladder frame. The upper platform is a rotary platform, one end of which is connected to the upper ladder frame and the other end is connected to the transmission pipe. The other end of the transmission pipe is connected to the telescopic jib. The lower ladder frame is installed in the upper ladder frame through a transmission device. The electric winch is arranged on the upper platform and is connected to the lower ladder frame through a transmission device, which is used to adjust the position of the lower ladder frame in the upper ladder frame so that the accommodation ladder can be used as a telescopic accommodation ladder. The tipping winch uses a steel wire rope to connect the upper ladder frame after passing through the column device and the telescopic jib, which is used for the tipping, lowering and recovery of the accommodation ladder. The telescopic jib completes the outward swing of the accommodation ladder around the rotary platform by adjusting the telescopic amount by a certain angle. The transmission device includes an upper ladder frame pulley group, a lower ladder frame pulley and rollers. The lower ladder frame is sleeved in the upper ladder frame through two axial slideways. The lower ladder frame moves on the slideway of the upper ladder frame through the rollers. The lower ladder frame and the electric winch are connected through the upper ladder frame pulley group, the lower ladder frame pulley and the pulley group steel wire rope. The forward / reverse rotation of the electric winch drives the telescopic / retraction of the lower ladder frame. The upper ladder frame is provided with a tipping step and a tipping step limit. The lower ladder frame is provided with fixed steps. During the lowering process of the lower ladder frame, due to the different positions of the center of gravity and the rotation center, the tipping step can naturally rotate around the fixed axis under the action of gravity. The tipping step limit is used to limit the tipping angle of the tipping step. When the lower ladder frame is retracted, the tipping step is pushed by the lower ladder frame to rotate.

2. The retractable gangway with adjustable outward swing angle according to claim 1, wherein, It also includes a fastening device. After the lower ladder frame is retracted, the ladder frame and the upper platform are erected as a whole and are tied and fixed through the fastening device. The fastening device and the lower part of the column device are both installed on the deck.

3. The retractable gangway with adjustable outward swing angle according to claim 1, wherein The electric winch is provided with a check device.

4. The retractable gangway with adjustable outward swing angle according to claim 1, characterized in that, The electric winch is placed on the protruding platform of the rotating part of the upper platform and can rotate together with the upper platform.

5. The retractable gangway with adjustable outward swing angle according to claim 1, wherein The telescopic jib is a hydraulic structure. Inside, the fixed jib and the movable jib are connected through a hydraulic cylinder, and the movable jib is pushed out by the hydraulic cylinder.

Images