Folding cargo hold place inspection channel

Abstract

The invention discloses a folding cargo hold position 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 semi-folding platform which are arranged adjacently; the full-folding platform comprises a first toggle plate and a first foldable platform; a fixing part is arranged on the ship body structure; the semi-folding platform comprises a second toggle 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 semi-folding platform. The device is simple in structure, convenient to operate, time-saving, high in safety and good in economical efficiency.

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 on 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 on 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] Further, the folding limiting hole and the unfolding limiting hole are provided in the chute.

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

[0021] Further, the rear end of the second foldable platform is provided with a limiting protruding member, and the fixed platform is provided with a limiting clamping member; when the second foldable platform is flat, the limiting protruding member abuts against the bottom of the limiting clamping member.

[0022] Further, the fixed platform, the first foldable platform and the second foldable platform are all grilles.

[0023] Further, the fixed platform and the second foldable platform when flat are located in the same plane.

[0024] The present application has the advantages that: the test channel of the present application does not need to disassemble the grilles and the platform frame before and after the hoisting operation of the liquid cargo tank; before hoisting, the test platform is quickly folded by folding the grille platform, which increases the installation space for the hoisting of the liquid cargo tank and improves the safety of the hoisting of the liquid cargo tank; after the hoisting is completed, the platform can be quickly unfolded and firmly fixed during the operation period, avoiding collision caused by ship shaking. The semi-foldable platform can be folded and supported by the limiting connecting rod and the folding limiting point, and can be unfolded and supported by the limiting connecting rod, the unfolding limiting point and the limiting member, which is simple in structure, safe and reliable. The whole channel structure is simple, convenient, time-saving, safe and economical. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a top view of the preferred embodiment of the present application.

[0026] Figure 2 It is Figure 1 A-A sectional view in the figure.

[0027] Figure 3 It is Figure 2 A schematic view of the full-foldable platform when folded.

[0028] Figure 4 It is Figure 1 A B-B sectional view in the figure.

[0029] Figure 5 It is Figure 4 A schematic view of the semi-foldable platform when folded.

[0030] Figure 6 It is Figure 5 An enlarged schematic view of the semi-foldable platform when folded.

[0031] Figure 7 It isFigure 6 Side view of the platform in the half-folded state.

[0032] Figure 8 For Figure 6 Schematic view of the platform in the unfolded state. DETAILED DESCRIPTION

[0033] The application will be described below in a preferred embodiment and in connection with the drawings.

[0034] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown in the drawings, a folding cargo hold compartment inspection passage includes a passage platform arranged between a liquid cargo hold tank 11 and a ship structure 10. Due to the large volume of the liquid cargo hold tank, only the insulation part of the liquid cargo hold tank is shown in the drawings.

[0035] The passage platform includes a full folding platform 20 and a half folding platform 30 arranged adjacently.

[0036] The full folding platform 20 includes a first elbow plate 22 fixed to the ship structure 10 and a first foldable platform 21 pivotally connected to the first elbow plate. A fixing member 23 for fixing the first foldable platform is arranged on the ship structure 10. The fixing member is a eye plate. A first pivot shaft 24 is arranged between the first foldable platform 21 and the first elbow plate 22.

[0037] The half folding platform 30 includes a second elbow plate 33 fixed to the ship structure 10, a fixed platform 31 fixed to the second elbow plate, and a second foldable platform 32 pivotally connected to the fixed platform. A second pivot shaft 34 is arranged between the second foldable platform 32 and the fixed platform 31. The fixed platform 31 and the second foldable platform 32 in the unfolded state are located in the same plane.

[0038] A limiting connecting rod 40 is arranged between the fixed platform 31 and the second foldable platform 32, and can pull up the second foldable platform.

[0039] The fixed platform 31 is provided with a sliding groove 35, and a sliding block 36 is arranged in the sliding groove 35. One end of the limiting connecting rod 40 is pivotally connected to the sliding block 36, and the other end of the limiting connecting rod 40 is pivotally connected to the second foldable platform 32.

[0040] The sliding groove 35 is provided with a folding limiting hole 37 and an unfolding limiting hole 38. The unfolding limiting hole 38 is arranged between the folding limiting hole 37 and the second pivot shaft 34. A latch 43 is arranged in each of the folding limiting hole and the unfolding limiting hole. The latch can be a spring latch.

[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 is provided between the fixed platform and the second foldable platform, which can pull up the second foldable platform; a first straight ladder is located below the fully foldable platform; and a second straight ladder is located above the semi-foldable platform.

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 channel as described in claim 4, characterized in that, The fixed platform is equipped with a slide groove, and a slider is installed inside the slide groove. One end of the limiting link is axially connected to the slider, and the other end of the limiting link is axially connected to the second foldable platform.

6. The foldable cargo hold space inspection passage as described in claim 5, characterized in that, The slide groove is provided with a folding limit hole and an unfolding limit hole; each of the folding limit hole and the unfolding limit hole is provided with a pin.

7. The foldable cargo hold space inspection passage as described in claim 6, characterized in that, The unfolding limiting hole is located between the folding limiting hole and the second rotating shaft.

8. The foldable cargo hold space inspection channel as described in claim 1, characterized in that, The second foldable platform has a limiting protrusion at its rear end, and the fixed platform has a limiting locking component; when the second foldable platform is laid flat, the limiting protrusion abuts against the bottom of the limiting locking component.

9. 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.

10. 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.

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