Detachable ship fuel oil tank wall protection device
By setting up a structural frame of clamps and guide grooves on the bulkhead of the ship's fuel tank, and using plate-like parts to form a protective surface, the problems of high material costs and large space occupancy in the prior art are solved, and effective bulkhead protection is achieved and low-cost maintenance.
Patent Information
- Application Number
- CN202411484249.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-23
- Publication Date
- 2024-12-20
AI Technical Summary
The prior art has problems such as high material costs, increased weight of empty ships, reduced cargo loading and large space occupation when protecting ship fuel tank bulkheads, which has led many ship owners to give up on taking protective measures.
A detachable ship fuel tank bulkhead protection device is designed, and the structural frame of T-profile and flat steel is fixed and restricted by setting up multiple clamping parts and guide grooves on the common bulkheads. The position of the plate-like parts forms a protective surface to prevent cargo from directly acting on the bulkhead.
It realizes effective protection of fuel tank bulkheads without adding additional steel weight and occupying cargo space, reducing maintenance and replacement costs, and is simple in structure and easy to operate and maintain.
Smart Images
Figure CN119160325A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of ships, and in particular to a detachable ship fuel tank bulkhead protection device. Background Art
[0002] For general cargo ships and multi-purpose ships, the storage space of the front and rear hatch covers of the cargo hold is usually reasonably utilized, and fuel tanks are set up in front and rear of the cargo hold to store fuel. This type of ship is suitable for a wide variety of cargoes, including various types of bulk cargoes such as coal, iron ore, etc., and can also transport various packaged goods, as well as piece goods such as steel products (steel pipes, steel plates, etc.), heavy goods, and wood products.
[0003] When unloading bulk cargo, a loader is usually required for tank clearing operations. The grab of the loader will be close to the bulkhead during operation, which will cause wear and even damage to the lower edge of the bulkhead over time. When loading and unloading general cargo or packaged goods, the cargo will shake during the lifting process due to environmental factors such as wind and waves and the proficiency of the crane operator, and there is a probability of hitting the cargo hold bulkhead. If the cargo itself is heavy and has a large range of movement during the lifting process, once it hits the cargo hold bulkhead, it may cause a certain degree of damage to the bulkhead, and even cracks and holes may appear. Once the common bulkhead between the fuel tank and the cargo hold is damaged and cannot be kept watertight, it will cause fuel leakage and cause environmental pollution.
[0004] Based on the above situation, shipowners often require ships to take necessary measures to protect the fuel tank bulkheads adjacent to the cargo holds. In practical applications, the following two methods are commonly used.
[0005] Method 1: Increase the thickness of the common bulkhead between the fuel tank and the cargo hold. By increasing the thickness of the bulkhead, the strength of the common bulkhead can be improved, thereby reducing the probability of damage to the bulkhead caused by external forces such as cargo, grabs, and forklifts.
[0006] Method 2: Set up an isolation void between the fuel tank and the cargo hold. By setting up an isolation void with a rib spacing, a physical separation is formed between the fuel tank and the cargo hold. Even if the front / rear bulkhead of the cargo hold is damaged, it will hardly affect the bulkhead of the fuel tank surrounded by the isolation void. The newly added isolation void needs to be equipped with 1 to 2 sets of air pipes and sounding pipes.
[0007] The first method of the prior art is to increase the thickness of the common bulkhead, but the disadvantages are as follows:
[0008] 1. There is no exact standard to determine how much thickness of steel plate should be added to ensure that the common bulkhead is not damaged. The thickness of the plate can only be set according to the experience of the builder or buyer, so the results vary.
[0009] 2. The increase in bulkhead thickness not only increases material costs, but also increases the empty ship weight, which will reduce the cargo loading weight accordingly.
[0010] 3. Once a large external force damages the common bulkhead, the damaged area still needs to be repaired to avoid fuel leakage, or even partial replacement of steel plates. Therefore, maintenance is time-consuming, labor-intensive and costly.
[0011] The second method of the prior art is to set up an isolation cabin, which has the following disadvantages:
[0012] 1. An additional bulkhead is required to form an isolated empty compartment, which not only increases the material and construction costs of steel, air pipes, sounding pipes, etc., but also increases the empty ship weight of the ship, and correspondingly reduces the cargo loading weight.
[0013] 2. To facilitate construction, the isolation tank has a minimum width requirement, usually one rib distance, which will take up valuable cargo hold space. The length and width of the cargo hold are crucial for this type of cargo ship.
[0014] It is precisely because of the above-mentioned shortcomings of existing technologies that many shipowners have to give up taking protective measures. Summary of the invention
[0015] The technical problem to be solved by the present invention is to overcome the above-mentioned defects of the prior art and provide a detachable ship fuel tank bulkhead protection device.
[0016] The present invention solves the above technical problems through the following technical solutions:
[0017] A detachable ship fuel tank bulkhead protection device comprises a common bulkhead arranged between the fuel tank and the cargo hold, a plurality of clamping members are fixedly arranged on the surface of the common bulkhead located on one side of the cargo hold, the clamping members are vertically distributed along the common bulkhead, guide grooves are formed between adjacent clamping members, plate-like members are inserted into the guide grooves; the clamping members have longitudinal limiting ends capable of limiting the plate-like members from detaching from the clamping members along the longitudinal direction of the ship.
[0018] Furthermore, the clamping member is a T-shaped bar; the web of the T-shaped bar is fixedly connected to the common bulkhead, and the face plate of the T-shaped bar is the longitudinal limiting end of the clamping member.
[0019] Furthermore, a plate-like member is inserted between the clamping member and the longitudinal bulkhead of the cargo hold, and a longitudinal limiting member capable of limiting the longitudinal movement of the plate-like member along the ship is fixedly provided on the longitudinal bulkhead of the cargo hold.
[0020] Furthermore, the longitudinal restraints are distributed vertically along the longitudinal bulkheads of the cargo hold.
[0021] Furthermore, the longitudinal restriction member is a flat steel, which is perpendicular to the longitudinal bulkhead of the cargo hold.
[0022] Furthermore, there is a gap between the clamping member and the plate-like member, which allows the plate-like member to easily separate from the clamping member in the vertical direction of the ship.
[0023] Further, the outer surface of the face plate of the T-profile is lower than the end surface of the plate-like member facing the cargo hold, and the plate-like member has a clamped end portion clamped between the face plate of the T-profile and the common bulkhead.
[0024] Furthermore, the outer side of the clamped end portion is a notch portion, and the panel of the T-profile is located in the notch portion.
[0025] Further, the transverse distance between the web of the T-profile and the clamped end of the plate-like member is smaller than the transverse distance between the face plate of the T-profile and the longitudinal wall of the notch of the plate-like member.
[0026] Furthermore, the plate-like member is a wooden board or a plastic board.
[0027] The beneficial effects of the present invention are as follows: the present invention has a simple structure, requires less materials, is easy to obtain, has a low initial investment, and has a low maintenance cost; by placing plate-like parts on the common bulkhead for isolation, the protection effect is good and the steel bulkhead will not be damaged. The present invention adopts a detachable design, which can be placed when needed and removed when not needed, which is very flexible; once the plate-like parts are partially damaged, the replacement operation can be completed quickly, which is very convenient. The present invention occupies less space and basically does not affect the cargo hold volume. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1 It is a top view of a preferred embodiment of the present invention.
[0029] Figure 2 It is a side view of a preferred embodiment of the present invention.
[0030] Figure 3 It is a top view of a preferred embodiment of the present invention when the plate-like member is not installed.
[0031] Figure 4 It is a side view of a preferred embodiment of the present invention when the plate-like member is not installed.
[0032] Figure 5 It is a schematic diagram of the structure between the clamping member and the plate-like member according to a preferred embodiment of the present invention.
[0033] Figure 6 It is a schematic diagram of the structure between the longitudinal restriction member and the plate-like member according to a preferred embodiment of the present invention. DETAILED DESCRIPTION
[0034] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.
[0035] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, a detachable ship fuel tank bulkhead protection device comprises a common bulkhead 13 arranged between the fuel tank 10 and the cargo hold 11, and a plurality of clamping members 20 are fixedly arranged on the surface of the common bulkhead located on one side of the cargo hold.
[0036] The distances between adjacent clamping members are equal. The clamping members are evenly spaced along the common bulkhead.
[0037] The clamping members 20 are vertically distributed along the common bulkhead 13 , and guide grooves 23 are formed between adjacent clamping members 20 , into which the plate-shaped members 30 are inserted.
[0038] The clamping member 20 is a T-shaped bar; the web 21 of the T-shaped bar is fixedly connected to the common bulkhead 13 .
[0039] The clamping member 20 has a longitudinal limiting end capable of limiting the plate-like member from escaping from the clamping member in the longitudinal direction of the ship. The face plate 22 of the T-shaped bar is the longitudinal limiting end of the clamping member. The web 21 of the T-shaped bar is used to limit the plate-like member from escaping from the clamping member in the transverse direction of the ship.
[0040] A plate-like member 30 is interposed between the clamping member 20 and the longitudinal bulkhead 14 of the cargo hold.
[0041] A longitudinal restriction member 15 capable of restricting the plate-like member from moving longitudinally along the ship is fixedly provided on the longitudinal bulkhead 14 of the cargo hold. The longitudinal restriction member 15 is vertically distributed along the longitudinal bulkhead of the cargo hold.
[0042] The longitudinal restraint 15 is a flat steel bar which is perpendicular to the longitudinal bulkhead of the cargo hold.
[0043] There is a gap between the clamping member 20 and the plate-like member 30, which allows the plate-like member to be easily separated from the clamping member in the vertical direction of the ship.
[0044] like Figure 5 As shown, the outer surface of the face plate 22 of the T-section bar is lower than the end surface 31 of the plate-like member facing the cargo hold, and the plate-like member 30 has a clamped end 32 clamped between the face plate of the T-section bar and the common bulkhead.
[0045] The outer side of the clamped end portion 32 is a notch portion 33, and the panel of the T-shaped material is located in the notch portion.
[0046] like Figure 5 As shown, the transverse distance between the web 21 of the T-shaped bar and the clamped end 32 of the plate-like member is a, and the transverse distance between the face plate of the T-shaped bar and the longitudinal wall of the notch of the plate-like member is c, wherein a<c.
[0047] like Figure 6 As shown, the outer surface of the longitudinal restraining member 15 is lower than the end surface of the plate-like member 30 facing the cargo hold.
[0048] The plate-shaped member 30 is a wooden board.
[0049] In other embodiments, the plate-shaped member is a plastic plate, or other materials.
[0050] The device includes a structural frame, which is made of structural profiles and arranged on the cargo hold side of the common bulkhead between the fuel tank and the cargo hold, and is made into a vertical guide groove for placing and fixing plate-like members. The structural frame uses two structural profiles, which include a T-shaped profile fixed to the common bulkhead and a flat steel fixed to the longitudinal bulkhead of the cargo hold.
[0051] To achieve the interchangeability of all plate-like parts, the profiles are arranged at equal intervals. The specific spacing size can be considered comprehensively based on the width of the cargo hold, the weight of the plate-like parts and the flexibility of operation. It is recommended to select 2 to 3 meters. The height of the structural frame is determined according to the scope to be protected, usually starting from the bottom of the cargo hold.
[0052] The plate-like parts can be made of wood, especially hard wood, such as pine, which can withstand a certain intensity of impact. The thickness of the wood is recommended to be 30-40mm. There is no special requirement for the width of the wood, and all wood can be uniform. The length of the wood is determined according to the spacing between the profiles, and the gap between the profiles must be considered to enable flexible placement and removal.
[0053] When in use, workers can approach the top of the guide groove through a ladder, and with the help of a crane or pulley (when there is a hidden cabin), they can lift the wooden board to the top of the guide groove by hooking the steel cable with a right-angle hook at the end to hook the bottom of the wooden board, and then place them one by one along the guide groove. When the wooden board is not needed or damaged, it can be lifted out. The operation is very simple.
[0054] The protection principle of this device is: all wooden boards form a protection surface. Once hit by external forces such as cargo, the hit wooden board can well transmit the local impact force to the entire board, which can significantly reduce the load that should have been borne by the local structural bulkhead, thereby achieving the purpose of protecting the public bulkhead.
[0055] In order to realize the flexible placement, removal and positioning of the wooden board through the guide groove formed by the structural frame, the wooden board needs to be cut at one side at both ends to match the profile shape. When placed in the structural frame, the wooden board mainly bears the gravity of itself and the wooden board above. Even if it is affected by the ship's pitch and pitch, it will not generate a large overturning force to the outside. Therefore, the profile is subject to limited force, and there is no other special requirement for its strength except for the force during loading and unloading operations.
[0056] One side of both ends of the wooden board is cut corners, that is, a notch is set, and at the same time, a necessary gap must be left between the wooden board and the structural frame. Figure 5 As shown, a<c, which can prevent the corner of the board from being damaged by the profile. In addition, to prevent the structural frame from being damaged by a forklift, cargo, etc., the outer surface of the profile should be lower than the outer side of the board.
[0057] The size, gap and profile of the wooden boards should be selected according to actual conditions.
[0058] The detachable ship fuel tank bulkhead protection device of the present invention can prevent the common bulkhead between the fuel tank and the cargo hold from being damaged by external forces such as cargo, grabs, forklifts, etc. during cargo loading and unloading operations, thereby preventing the common bulkhead from being damaged by long-term wear.
[0059] Compared with the conventional protection method of increasing the thickness of the bulkhead steel plate or setting up an isolated empty compartment, the protection device of the present invention does not need to increase the weight of a lot of additional steel, saving costs, and does not need to sacrifice precious cargo hold loading space.
[0060] In addition, when conventional protection methods are adopted, once the bulkhead is hit, it may be deformed or even cracked, which may cause fuel leakage in the fuel tank and cause environmental pollution in severe cases, and require partial replacement of panels, which is time-consuming, labor-intensive and costly to maintain. The protection device of the present invention can well protect the bulkhead, and the damaged wooden boards can also be easily replaced.
[0061] The present invention has the following advantages:
[0062] 1. Simple structure, less materials required, easy to obtain, low initial investment and low maintenance cost.
[0063] 2. By placing plate-like parts on the common bulkhead for isolation, the protection effect is good and the steel bulkhead will not be damaged.
[0064] 3. The detachable design allows you to place it when needed and remove it when not needed, which is very flexible. Once the plate-like part is partially damaged, it can be replaced quickly, which is very convenient.
[0065] 4. It takes up little space and basically does not affect the cargo hold volume.
[0066] 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. A detachable ship fuel tank bulkhead protection device, comprising a common bulkhead arranged between the fuel tank and the cargo hold, It is characterized in that A plurality of clamps are fixedly arranged on the surface of the common bulkhead on one side of the cargo hold. The clamps are vertically distributed along the common bulkhead. Guide grooves are formed between adjacent clamps. Plate-like members are inserted into the guide grooves. The clamps have longitudinal limiting ends that can limit the plate-like members from detaching from the clamps along the longitudinal direction of the ship.
2. The detachable ship fuel tank bulkhead protection device according to claim 1, It is characterized in that The clamping member is a T-shaped bar; the web of the T-shaped bar is fixedly connected to the common bulkhead, and the face plate of the T-shaped bar is the longitudinal limiting end of the clamping member.
3. The detachable ship fuel tank bulkhead protection device according to claim 2, It is characterized in that A plate-like member is inserted between the clamping member and the longitudinal bulkhead of the cargo hold, and a longitudinal limiting member capable of limiting the longitudinal movement of the plate-like member along the ship is fixed on the longitudinal bulkhead of the cargo hold.
4. The detachable ship fuel tank bulkhead protection device according to claim 3, It is characterized in that Longitudinal restraints are distributed vertically along the longitudinal bulkheads of the cargo hold.
5. The detachable ship fuel tank bulkhead protection device according to claim 4, It is characterized in that The longitudinal restraints are flat steels which are perpendicular to the longitudinal bulkheads of the cargo holds.
6. The detachable ship fuel tank bulkhead protection device according to claim 3, It is characterized in that There is a gap between the clamping member and the plate-shaped member, which can conveniently allow the plate-shaped member to separate from the clamping member along the vertical direction of the ship.
7. The detachable ship fuel tank bulkhead protection device according to claim 2, It is characterized in that The outer surface of the face plate of the T-section bar is lower than the end surface of the plate-like member facing the cargo hold, and the plate-like member has a clamped end portion clamped between the face plate of the T-section bar and the common bulkhead.
8. The detachable ship fuel tank bulkhead protection device according to claim 7, It is characterized in that The outer side of the clamped end portion is a notch portion, and the panel of the T-shaped material is located in the notch portion.
9. The detachable ship fuel tank bulkhead protection device according to claim 8, It is characterized in that The transverse distance between the web of the T-profile and the clamped end of the plate-like member is smaller than the transverse distance between the face plate of the T-profile and the longitudinal wall of the notch portion of the plate-like member.
10. The detachable ship fuel tank bulkhead protection device according to claim 1, It is characterized in that The plate-shaped member is a wooden board or a plastic board.