Folding cargo hold space inspection passage

Abstract

The application discloses a folding cargo hold place inspection channel, which comprises a channel platform arranged between a liquid cargo hold tank and a ship body structure; a first straight ladder is arranged below the channel platform, and a second straight ladder is arranged above the channel platform; the channel platform comprises a full folding platform and a half folding platform which are arranged adjacently; the full folding platform comprises a first elbow plate and a first foldable platform; a fixing component is arranged on the ship body structure; the half folding platform comprises a second elbow plate, a fixed platform and a second foldable platform; a limiting connecting rod is arranged between the fixed platform and the second foldable platform; the first straight ladder is arranged below the full folding platform; and the second straight ladder is arranged above the half folding platform. The application has the advantages of simple structure, convenient operation, time saving, high safety and good economy.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of ship technology, in particular to a folding cargo hold place inspection passage. BACKGROUND

[0002] With the increasing awareness of environmental protection in the world, the requirements of the International Maritime Organization (IMO) and other relevant agencies for ship emissions are becoming increasingly stringent, and the application demand of liquid cargo ships is more and more extensive. However, how to meet the minimum requirements of the Cargo Ship Structures - Rules for Building and Classing of Ships Carrying Liquefied Gases in Bulk (IGC) rules for cargo hold place inspection passage while ensuring the safe and stable lifting of liquid cargo tank is the key problem to realize the maximization of liquid cargo tank capacity.

[0003] In order to ensure the strength and integrity of the structure of the liquid cargo tank, the Cargo Ship Structures - Rules for Building and Classing of Ships Carrying Liquefied Gases in Bulk (IGC) rules require that necessary inspection passages be provided in the cargo hold place, and the minimum distance of the inspection passage required for the cargo hold place (i.e. the minimum distance between the surface of the liquid cargo tank and the cargo hold place structure) is limited. Therefore, in order to realize the maximization of the liquid cargo tank capacity, the gap between the liquid cargo tank and the inspection passage platform is often small. At the same time, when the liquid cargo tank is lifted in the cargo hold place, there is also a layer of fragile insulation material on the surface, which greatly increases the difficulty of lifting the liquid cargo tank. Once the liquid cargo tank collides with the ship structure or the inspection platform during lifting, not only will the ship structure and the inspection passage be damaged, but also the surface insulation of the liquid cargo tank will be easily damaged.

[0004] Currently commonly used cargo hold place inspection passages mainly include the following two types:

[0005] (1) Fixed cargo hold place inspection passage.

[0006] In the fixed cargo hold place inspection passage platform, the entire inspection passage is composed of a fixed inspection grating platform and a detachable hinge cover, and the fixed platform is divided into a platform frame, a platform diagonal brace, and a grating platform. The detachable hinge cover is mainly used to access the inspection platforms of each layer.

[0007] (2) Detachable cargo hold place inspection passage.

[0008] In the detachable cargo hold place inspection passage platform, the entire inspection passage is composed of a detachable inspection grating platform and a detachable hinge cover, and the detachable platform is divided into a detachable platform frame, a fixed platform frame, a platform diagonal brace, and a grating platform. The detachable hinge cover is mainly used to access the inspection platforms of each layer.

[0009] Disadvantages of the prior art:

[0010] 1. When a fixed cargo tank inspection passage platform is used, in order to avoid collision with the inspection platform during hoisting of the liquid cargo tank, a complex and extremely high hoisting process level is required, including various technical means such as on-site setting of guide rails, temporary cutting of part of the structure, subsequent repair of the structure and insulation, etc. The hoisting process and technical requirements of the shipyard are high. The liquid cargo tank hoisting operation is complex, time-consuming and labor-intensive. The hoisting operation gap is small, and collision is easy to occur, with poor safety.

[0011] 2. When a detachable cargo tank inspection passage platform is used, the platform frame, grating platform and fastening bolts need to be disassembled in advance to increase the liquid cargo tank hoisting space, and the disassembled parts need to be reinstalled and fixed after hoisting is completed. The whole process is complex, labor-intensive and difficult to install. Before hoisting, not only each grating needs to be disassembled, but also the grating platform frame must be disassembled from the bottom. After hoisting, the space is small, and the installation of the detachable grating platform and the detachable frame is difficult. SUMMARY

[0012] In order to overcome the above-mentioned defects existing in the prior art, the present application provides a folding cargo tank inspection passage.

[0013] The present application solves the above technical problems by the following technical solutions:

[0014] A folding cargo tank inspection passage, comprising a passage platform arranged between a liquid cargo tank and a ship structure; a first straight ladder is arranged below the passage platform, and a second straight ladder is arranged above the passage platform; the passage platform comprises a full folding platform and a half folding platform arranged adjacent to each other; the full folding platform comprises a first elbow plate fixed to the ship structure and a first foldable platform connected to the first elbow plate by a shaft; a fixing component for fixing the first foldable platform is arranged on the ship structure; the half folding platform comprises a second elbow plate fixed to the ship structure, a fixed platform fixed to the second elbow plate, and a second foldable platform connected to the fixed platform by a shaft; a limiting connecting rod capable of lifting the second foldable platform is arranged between the fixed platform and the second foldable platform; the first straight ladder is arranged below the full folding platform; and the second straight ladder is arranged above the half folding platform.

[0015] Further, the fixing component is an eye plate.

[0016] Further, a first rotating shaft is arranged between the first foldable platform and the first elbow plate.

[0017] Further, a second rotating shaft is arranged between the second foldable platform and the fixed platform.

[0018] Further, the fixed platform is provided with a sliding groove, a sliding block is arranged in the sliding groove, one end of the limiting connecting rod is connected to the sliding block by a shaft, and the other end of the limiting connecting rod is connected to the second foldable platform by a shaft.

[0019] Furthermore, the slide groove is provided with a folding limiting hole and an unfolding limiting hole; a pin is provided in the folding limiting hole and the unfolding limiting hole respectively.

[0020] Furthermore, the unfolding limiting hole is located between the folding limiting hole and the second rotating shaft.

[0021] Furthermore, the rear end of the second foldable platform is provided with a limiting protrusion, and the fixed platform is provided with a limiting locking component; when the second foldable platform is laid flat, the limiting protrusion abuts against the bottom of the limiting locking component.

[0022] Furthermore, the fixed platform, the first foldable platform, and the second foldable platform are all gratings.

[0023] Furthermore, the fixed platform and the second foldable platform when flattened are located on the same plane.

[0024] The beneficial effects of this invention are as follows: Using the inspection channel of this invention, there is no need to disassemble the grating and platform frame before or after the lifting operation of the liquid cargo tank; before lifting, the inspection platform can be quickly folded directly through the folding grating platform, increasing installation space for the liquid cargo tank lifting and improving the safety of the lifting operation; after lifting, it can be quickly unfolded and firmly fixed during operation, avoiding collisions caused by ship swaying. The semi-folding platform can achieve folding limiting support through limiting links and folding limiting points, and can also achieve unfolding limiting support through limiting links, unfolding limiting points, and limiting components, resulting in a simple structure and high safety and reliability. The entire channel structure is simple, easy to operate, time-saving, highly safe, and economical. Attached Figure Description

[0025] Figure 1 This is a top view of a preferred embodiment of the present invention.

[0026] Figure 2 for Figure 1 Schematic diagram of sectional view AA.

[0027] Figure 3 for Figure 2 A schematic diagram of the fully foldable platform when folded.

[0028] Figure 4 for Figure 1 Schematic diagram of the BB section.

[0029] Figure 5 for Figure 4 A schematic diagram of the semi-folding platform when folded.

[0030] Figure 6 for Figure 5 An enlarged diagram of the semi-folding platform when folded.

[0031] Figure 7 forFigure 6 View from C.

[0032] Figure 8 for Figure 6 A schematic diagram of the semi-folding platform when unfolded. Detailed Implementation

[0033] The present invention will be described more clearly and completely below with reference to a preferred embodiment and the accompanying drawings.

[0034] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, a foldable cargo hold inspection passage includes a passage platform located between the liquid cargo tank 11 and the hull structure 10. Due to the large size of the liquid cargo tank, only the insulation part of the liquid cargo tank is shown in the attached drawing.

[0035] The passage platform includes a fully foldable platform 20 and a semi-foldable platform 30 arranged adjacent to each other.

[0036] The fully foldable platform 20 includes a first elbow plate 22 fixed to the hull structure 10 and a first foldable platform 21 axially connected to the first elbow plate; the hull structure 10 is provided with a fixing component 23 for fixing the first foldable platform. The fixing component is an eye plate. A first rotation shaft 24 is provided between the first foldable platform 21 and the first elbow plate 22.

[0037] The semi-folding platform 30 includes a second elbow plate 33 fixed to the hull structure 10, a fixed platform 31 fixed to the second elbow plate, and a second foldable platform 32 axially connected to the fixed platform. A second rotation axis 34 is provided between the second foldable platform 32 and the fixed platform 31. The fixed platform 31 and the second foldable platform 32 when flat are located on the same plane.

[0038] A limiting link 40 capable of pulling up the second foldable platform is provided between the fixed platform 31 and the second foldable platform 32.

[0039] The fixed platform 31 is provided with a slide groove 35, and a slider 36 is provided in the slide groove 35. One end of the limiting link 40 is axially connected to the slider 36, and the other end of the limiting link 40 is axially connected to the second foldable platform 32.

[0040] The slide groove 35 has a folding limiting hole 37 and an unfolding limiting hole 38; the unfolding limiting hole 38 is located between the folding limiting hole 37 and the second rotating shaft 34. A pin 43 is provided in both the folding limiting hole and the unfolding limiting hole. The pin can be a spring pin.

[0041] The second foldable platform 32 has a limiting protrusion 39 at its rear end, and the fixed platform 31 has a limiting engagement member 44. When the second foldable platform is flat, the limiting protrusion abuts against the bottom of the limiting engagement member. The limiting engagement member and the limiting protrusion together form a limiting component.

[0042] The fixed platform 31, the first foldable platform 21, and the second foldable platform 32 are all grids.

[0043] A first vertical ladder 41 is located below the passageway platform, and a second vertical ladder 42 is located above the passageway platform. The first vertical ladder 41 is located below the fully foldable platform 20; the second vertical ladder 42 is located above the semi-foldable platform 30.

[0044] When a person needs to climb down from the top, that is, from the second vertical ladder to the first vertical ladder, they should first climb down the second vertical ladder and stand on the semi-folding platform; then reach out and fold up the fully folding platform next to the semi-folding platform and fix the fully folding platform in place, so that the first vertical ladder is fully exposed; then, climb from the semi-folding platform to the first vertical ladder and continue climbing down.

[0045] When personnel need to climb from the bottom to the top of the second ladder, they fold up the fully foldable platform and secure it, revealing a space above the first ladder leading to the semi-foldable platform. Then, they climb from the first ladder to the semi-foldable platform next to the fully foldable platform, and then climb from the semi-foldable platform to the second ladder and continue climbing up the second ladder.

[0046] The foldable cargo hold space inspection channel of the present invention can increase the installation space of liquid cargo tanks by folding upwards (e.g., Figure 4 and Figure 5 As shown, the net space between the passage platform and the cargo tank increases from A to E), and the entire folding platform structure includes a fully folding platform and a semi-folding platform.

[0047] The fully foldable platform includes a first elbow plate and a first foldable platform, primarily enabling passage between upper and lower platforms. An eye plate, mounted on the hull structure, secures the first foldable platform after it has been flipped over, facilitating movement of inspection personnel between inspection channels.

[0048] The semi-folding platform includes a fixed platform, a second foldable platform, a second elbow plate, and a limiting linkage. It mainly increases the installation space for liquid cargo tanks by folding the platform.

[0049] The semi-folding platform folds by using the rotation points of the second rotation axis and the limiting linkage. The limiting linkage, limiting points, and limiting components securely fix the platform in both folded and unfolded states. The fixed platform is equipped with folding and unfolding limiting points to provide limiting support for the limiting linkage, and also includes limiting latches to provide limiting support for the limiting protrusions. The limiting linkage primarily fixes the folded state through its rotation points and folding limiting points, and the unfolded state through its rotation points and unfolding limiting points.

[0050] The present invention has the following advantages:

[0051] 1. Before and after the lifting operation of the liquid cargo tank, there is no need to disassemble the grating and platform frame; before lifting, the inspection platform can be quickly folded by directly folding the grating platform, which increases the installation space for the liquid cargo tank lifting and improves the safety of the liquid cargo tank lifting; after the lifting is completed, it can be quickly unfolded and firmly fixed during operation to avoid collision caused by ship rolling.

[0052] 2. The semi-folding platform can achieve folding limiting support through limiting links and folding limiting points, and can also achieve unfolding limiting support through limiting links, unfolding limiting points, and limiting components. The structure is simple, safe, and reliable.

[0053] 3. The entire channel has a simple structure, is easy to operate, saves time and money, is highly safe, and is economical.

[0054] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A foldable cargo hold inspection passage, comprising a passage platform located between a liquid cargo tank and a ship's hull structure; a first vertical ladder is provided below the passage platform, and a second vertical ladder is provided above the passage platform; characterized in that, The passageway platform includes a fully foldable platform and a semi-foldable platform arranged adjacent to each other; the fully foldable platform includes a first elbow plate fixed to the hull structure and a first foldable platform shaft-connected to the first elbow plate; the hull structure is provided with a fixing component for fixing the first foldable platform; the semi-foldable platform includes a second elbow plate fixed to the hull structure, a fixed platform fixed to the second elbow plate, and a second foldable platform shaft-connected to the fixed platform; a limiting link capable of pulling up the second foldable platform is provided between the fixed platform and the second foldable platform; a first straight ladder is provided below the fully foldable platform. The second straight ladder is positioned above the semi-foldable platform; the fixed platform has a slide groove with a slider inside, one end of a limiting rod is shaft-connected to the slider, and the other end of the limiting rod is shaft-connected to the second foldable platform; the slide groove has a folding limiting hole and an unfolding limiting hole; pins are respectively provided in the folding limiting hole and the unfolding limiting hole; the unfolding limiting hole is located between the folding limiting hole and the second rotating shaft; the rear end of the second foldable platform has a limiting protrusion, and the fixed platform has a limiting locking component; when the second foldable platform is flat, the limiting protrusion abuts against the bottom of the limiting locking component.

2. The foldable cargo hold space inspection channel as described in claim 1, characterized in that, The fixed component is the eyeplate.

3. The foldable cargo hold space inspection channel as described in claim 1, characterized in that, A first rotation axis is provided between the first foldable platform and the first elbow plate.

4. The foldable cargo hold space inspection channel as described in claim 1, characterized in that, A second rotating axis is provided between the second foldable platform and the fixed platform.

5. The foldable cargo hold space inspection passage as described in claim 1, characterized in that, The fixed platform, the first foldable platform, and the second foldable platform are all grids.

6. The foldable cargo hold space inspection passage as described in claim 1, characterized in that, The fixed platform and the second foldable platform when flattened are located on the same plane.

Images