Optimized inward-inclined hatch coaming structure
By adopting an inclined longitudinal and transverse hatch enclosure structure in the ship, the cargo stacking problem caused by the dead corner of the hatch is solved, the loading and unloading operations are simplified and the cost is reduced, and a more efficient cargo loading and unloading and construction process is achieved.
Patent Information
- Application Number
- CN202411519756.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-01-03
AI Technical Summary
The dead corners formed by the crossing of the longitudinal and transverse hatch panels of existing ships lead to cargo accumulation, pollution and impurities, and conventional solutions such as the filling of cement have pulverized and fall off, which increases loading and unloading difficulties and construction costs.
It adopts an inclined hatch enclosure structure, with both longitudinal and transverse hatch enclosures tilting towards the cargo hold, and the top is close to the middle line of the ship and the vertical line of the cargo hold, forming a small-area hatch projection area, and a corner plate is provided at the connection. The edges are arcs or elliptical arcs, with an inclination of 3° to 20° to hide the hatch corner area.
It avoids cargo accumulation, simplifies loading and unloading operations, reduces cleaning workload and construction complexity, reduces hatch costs, and eliminates the need for additional filling of cement or installing unloading panels.
Smart Images
Figure CN119239833A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of ships, and in particular to an optimized inward-inclined hatch coaming structure. Background Art
[0002] At present, the conventional longitudinal and transverse hatch coamings of ships are set vertically. When the transverse and longitudinal hatch coamings intersect, dead corners are formed where cargo is easily accumulated. Especially when ships are loaded with bulk cargoes, such as grain, coal and metal ore, cargo is always found to be left during loading and unloading operations, resulting in cargo contamination or impurities, thus affecting the quality of the next batch of loaded cargoes.
[0003] Normally, when a ship is built, cement is filled in this dead corner before completion to alleviate the problem of cargo accumulation. However, due to the high humidity in the ship's operating environment, high batches of loading and unloading, and large amounts of cargo, over time, the cement will powder and fall off, causing additional impact on the quality of the cargo.
[0004] Some ships have fixed or foldable unloading plates above the hatch corner plates, and semicircular steel and corresponding supporting structures are installed at the edge of the hatch corner plates or below the corner plates to facilitate unloading and prevent the grab wire rope from wearing the corner plates and protect them. However, these structural forms cannot completely avoid cargo accumulation, increase the difficulty of construction and maintenance, and also increase construction costs. Summary of the invention
[0005] The technical problem to be solved by the present invention is to overcome the above-mentioned defects in the prior art and provide an optimized inward-inclined hatch coaming structure.
[0006] The present invention solves the above technical problems through the following technical solutions:
[0007] An optimized inward-inclined hatch coaming structure comprises a longitudinal hatch coaming and a transverse hatch coaming arranged on the top of a cargo hold; the longitudinal hatch coaming and the transverse hatch coaming are both inclined toward the cargo hold, the top of the longitudinal hatch coaming is closer to the ship centerline than the bottom of the longitudinal hatch coaming, and the top of the transverse hatch coaming is closer to the cargo hold mid-vertical line than the bottom of the transverse hatch coaming.
[0008] Further, the area of the region enclosed by the top of the longitudinal hatch coaming and the top of the transverse hatch coaming is smaller than the area of the region enclosed by the bottom of the longitudinal hatch coaming and the bottom of the transverse hatch coaming.
[0009] Furthermore, a corner plate is provided at the connection between the longitudinal hatch coaming and the transverse hatch coaming.
[0010] Further, the vertical projection lines of the top of the longitudinal hatch coaming and the top of the transverse hatch coaming form a hatch projection line; and the vertical projection line of the edge of the corner plate is located outside the hatch projection line.
[0011] Furthermore, the edge of the corner plate is a circular arc or an elliptical arc.
[0012] Furthermore, the angle between the longitudinal hatch coaming and the longitudinal vertical plane is the longitudinal coaming inclination angle; the angle between the transverse hatch coaming and the transverse vertical plane is the transverse coaming inclination angle; and both the longitudinal coaming inclination angle and the transverse coaming inclination angle are acute angles.
[0013] Furthermore, the inclination angle of the longitudinal enclosure is 3° to 20°; the inclination angle of the transverse enclosure is 3° to 20°.
[0014] Furthermore, the inclination angle of the longitudinal enclosure plate is equal to the inclination angle of the transverse enclosure plate.
[0015] Furthermore, the relationship between the inclination angle of the longitudinal coaming and the height of the longitudinal hatch coaming is that the value of the inclination angle of the longitudinal coaming decreases as the height of the longitudinal hatch coaming increases.
[0016] Furthermore, the relationship between the transverse coaming inclination angle and the transverse hatch coaming height is as follows: the value of the transverse coaming inclination angle decreases as the transverse hatch coaming height increases.
[0017] The beneficial effects of the present invention are as follows: the optimized hatch coaming structure of the present invention, the longitudinal hatch coaming and the transverse hatch coaming both adopt an inward-inclined structure, the hatch corner area is hidden outside the hatch, does not constitute an obstacle to the cargo loading operation at the hatch, is not easy to form a cargo accumulation phenomenon, and can avoid cargo accumulation; there is no need to take additional measures such as filling cement at the corner, which avoids the crew's work of cleaning the hatch corner when the ship is loading and unloading bulk cargo, reduces the manual workload of cargo loading and unloading operations, simplifies the dock operation process, and is conducive to loading and unloading operations. The optimized hatch coaming structure of the present invention reduces the size of the hatch, so that the area of the hatch cover becomes smaller, reduces the hatch cover area, and can select a hatch cover product with a slightly smaller area during the ordering process, thereby streamlining the hatch cover cost. The present invention eliminates the unloading plate, anti-wear round steel and its support structures at the hatch corner, simplifies the construction process, and saves construction costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a top view of a preferred embodiment of the present invention.
[0019] Figure 2 for Figure 1 Schematic diagram of the AA section.
[0020] Figure 3 for Figure 1 Schematic diagram of the BB section.
[0021] Figure 4 Schematic diagram of the inclination angle of the enclosure at three different enclosure heights according to a preferred embodiment of the present invention. DETAILED DESCRIPTION
[0022] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.
[0023] like Figure 1 , Figure 2 and Figure 3 As shown, an optimized inward-inclined hatch coaming structure comprises a longitudinal hatch coaming 10 and a transverse hatch coaming 20 arranged on the top of a cargo hold 30. The longitudinal hatch coaming 10 and the transverse hatch coaming 20 are both arranged above a deck 31, and a hatch coaming panel 32 is arranged on the top of the longitudinal hatch coaming 10 and the top of the transverse hatch coaming 20.
[0024] The longitudinal hatch coaming 10 and the transverse hatch coaming 20 are both inclined toward the cargo hold, the top of the longitudinal hatch coaming is closer to the ship centerline than the bottom of the longitudinal hatch coaming, and the top of the transverse hatch coaming is closer to the cargo hold mid-vertical line than the bottom of the transverse hatch coaming.
[0025] The area of the region enclosed by the top of the longitudinal hatch coaming 10 and the top of the transverse hatch coaming 20 is smaller than the area of the region enclosed by the bottom of the longitudinal hatch coaming 10 and the bottom of the transverse hatch coaming 20 .
[0026] A corner plate 33 is provided at the connection between the longitudinal hatch coaming 10 and the transverse hatch coaming 20 .
[0027] The vertical projection lines of the top of the longitudinal hatch coaming 10 and the top of the transverse hatch coaming 20 form a hatch projection line; the vertical projection line of the corner plate edge is located outside the hatch projection line.
[0028] The edge of the corner plate 33 is a circular arc or an elliptical arc.
[0029] The angle between the longitudinal hatch coaming 10 and the longitudinal vertical plane 11 is the longitudinal coaming inclination angle; the angle between the transverse hatch coaming 20 and the transverse vertical plane 21 is the transverse coaming inclination angle; the longitudinal coaming inclination angle and the transverse coaming inclination angle are both acute angles.
[0030] The inclination angle a of the longitudinal enclosure is 3°~20°; the inclination angle b of the transverse enclosure is 3°~20°.
[0031] The relationship between the inclination angle of the longitudinal coaming and the height of the longitudinal hatch coaming is that the value of the inclination angle of the longitudinal coaming decreases as the height of the longitudinal hatch coaming increases.
[0032] The relationship between the transverse coaming inclination angle and the transverse hatch coaming height is as follows: the value of the transverse coaming inclination angle decreases as the transverse hatch coaming height increases.
[0033] The greater the height of the longitudinal hatch coaming, the smaller the inclination angle of the longitudinal coaming; the greater the height of the transverse hatch coaming, the smaller the inclination angle of the transverse coaming.
[0034] In this embodiment, the inclination angle of the longitudinal enclosure plate is equal to the inclination angle of the transverse enclosure plate.
[0035] When the longitudinal enclosure inclination angle and the transverse enclosure inclination angle are equal, the longitudinal enclosure inclination angle and the transverse enclosure inclination angle are collectively referred to as the enclosure inclination angle.
[0036] The main deck of a ship may have a beam arch or a chine arc, the height of the longitudinal hatch coaming varies at different ribs in the length direction of the ship, and the height of the transverse hatch coaming varies at different positions from the center of the ship.
[0037] For longitudinal hatch coamings with different heights at different rib positions, the height of the longitudinal hatch coaming at the minimum height is taken as the base height of the longitudinal hatch coaming.
[0038] For transverse hatch coamings with different heights at different distances from the centerline of the ship, the height of the transverse hatch coaming at the centerline of the ship shall be taken as the base height of the transverse hatch coaming.
[0039] The smaller value between the height base of the longitudinal hatch coaming and the height base of the transverse hatch coaming shall be used as the coaming height.
[0040] The value of the inclination angle of the hoarding decreases as the height of the hoarding increases.
[0041] Figure 4 In the figure, the longitudinal hatch coaming and the transverse hatch coaming are simplified and are collectively referred to as coamings. Three inclined solid lines represent coamings in three cases, namely: coaming 41 in the first case, coaming 42 in the second case, and coaming 43 in the third case. Coamings 41, 42, and 43 can be either longitudinal hatch coamings or transverse hatch coamings. The greater the coaming height, the smaller the value of the coaming inclination angle.
[0042] Figure 4 The inclination angle of the coaming for three cases is shown:
[0043] The height H1 of the enclosure 41 is 1.0 m, and the corresponding enclosure inclination angle c1 is 17°.
[0044] The height H2 of the enclosure 42 is 2.0 m, and the corresponding enclosure inclination angle c2 is 10°.
[0045] The height H3 of the enclosure 43 is 3.0 m, and the corresponding enclosure inclination angle c3 is 6°.
[0046] For Figure 4 For hoardings of other heights not shown in the figure, their corresponding hoarding inclination angles can be interpolated and calculated according to the hoarding heights and corresponding hoarding inclination angles of the above three cases.
[0047] In the present invention, the longitudinal hatch coaming is arranged in a form of being inclined inwardly toward the cargo hold hatch, and the transverse hatch coaming is also arranged in a form of being inclined inwardly toward the cargo hold hatch, so that the hatch forms an inward-retracted structure, and the edge of the corner plate at the connection between the longitudinal hatch coaming and the transverse hatch coaming is located outside the vertical projection line of the hatch, the corner plate does not constitute an obstacle to the cargo loading operation at the hatch, and cargo is not easily accumulated at the corner.
[0048] The optimized hatch coaming structure of the present invention adopts an inward-inclined structure in both the longitudinal hatch coaming and the transverse hatch coaming. The hatch corner area is hidden outside the hatch, which does not constitute an obstacle to the cargo loading operation at the hatch, is not easy to form a cargo accumulation phenomenon, and can avoid cargo accumulation; there is no need to adopt additional measures such as filling cement at the corner, which avoids the work of the crew to clean the hatch corner when the ship is loading and unloading bulk cargo, reduces the manual workload of cargo loading and unloading operations, simplifies the terminal operation process, and is conducive to loading and unloading operations.
[0049] The optimized hatch coaming structure of the present invention reduces the size of the hatch, so that the area of the hatch cover becomes smaller accordingly, and the hatch cover area is reduced. During the ordering process, hatch cover products with a slightly smaller area can be selected, thereby streamlining the hatch cover cost.
[0050] The present invention eliminates the need for unloading plates, wear-resistant round steel and supporting structures at hatch corners, simplifies the construction process and saves construction costs.
[0051] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.
Claims
1. An optimized inward-inclined hatch coaming structure, comprising a longitudinal hatch coaming and a transverse hatch coaming arranged on the top of the cargo hold; characterized in that: Both the longitudinal hatch coaming and the transverse hatch coaming are inclined toward the cargo hold, with the top of the longitudinal hatch coaming being closer to the centerline of the ship than the bottom of the longitudinal hatch coaming, and the top of the transverse hatch coaming being closer to the mid-vertical line of the cargo hold than the bottom of the transverse hatch coaming.
2. The optimized inward-tilted hatch coaming structure according to claim 1, characterized in that: The area of the region enclosed by the top of the longitudinal hatch coaming and the top of the transverse hatch coaming is smaller than the area of the region enclosed by the bottom of the longitudinal hatch coaming and the bottom of the transverse hatch coaming.
3. The optimized inward-tilted hatch coaming structure according to claim 1, characterized in that: A corner plate is provided at the connection between the longitudinal hatch coaming and the transverse hatch coaming; the vertical projection lines of the top of the longitudinal hatch coaming and the top of the transverse hatch coaming form a hatch projection line; and the vertical projection line of the edge of the corner plate is located outside the hatch projection line.
4. The optimized inward-tilted hatch coaming structure according to claim 3, characterized in that: The edge of the corner plate is a circular arc or an elliptical arc.
5. The optimized inward-tilted hatch coaming structure according to claim 1, characterized in that: The angle between the longitudinal hatch coaming and the longitudinal vertical plane is the longitudinal coaming inclination angle; the angle between the transverse hatch coaming and the transverse vertical plane is the transverse coaming inclination angle; both the longitudinal coaming inclination angle and the transverse coaming inclination angle are acute angles.
6. The optimized inward-tilted hatch coaming structure according to claim 5, characterized in that: The inclination angle of the longitudinal enclosure is 3°~20°.
7. The optimized inward-tilted hatch coaming structure according to claim 5, characterized in that: The inclination angle of the transverse enclosure is 3°~20°.
8. The optimized inward-tilted hatch coaming structure according to claim 5, characterized in that: The inclination angle of the longitudinal and transverse panels is equal.
9. The optimized inward-tilted hatch coaming structure according to claim 5, characterized in that: The relationship between the longitudinal coaming inclination angle and the longitudinal hatch coaming height is: the value of the longitudinal coaming inclination angle decreases as the longitudinal hatch coaming height increases.
10. The optimized inward-tilted hatch coaming structure according to claim 5, characterized in that: The relationship between the transverse coaming inclination angle and the transverse hatch coaming height is: the value of the transverse coaming inclination angle decreases as the transverse hatch coaming height increases.