A filter structure for ship cargo hold sewage and a ship cargo hold sewage system

Abstract

The utility model provides a kind of filtering structure and ship cargo hold sewage system for ship cargo hold sewage, it is related to ship cargo hold sewage technical field, for being set in the sewage tank in the bottom of ship cargo hold, it include: cover, cover is used to connect in the upper end of sewage tank, the middle part of cover is provided with through-hole;Fixed filter drum, the upper end of fixed filter drum is connected with cover, and with through-hole intercommunication, the lower end of fixed filter drum is provided with first bottom plate, the sidewall of fixed filter drum is equipped with multiple first filter holes;Movable filter drum, movable filter drum is rotatably arranged in the inside of fixed filter drum, the sidewall of movable filter drum is equipped with multiple second filter holes, second filter hole is matched with first filter hole, the size of the overlapping part of second filter hole and first filter hole can be changed by the rotation of movable filter drum relative to fixed filter drum;The problem that filter aperture cannot be adjusted when ship cargo hold sewage in the prior art, and cleaning is inconvenient is solved.

Description

Technical Field

[0001] This utility model belongs to the field of ship cargo hold sewage discharge technology, and more specifically, relates to a filter structure and a ship cargo hold sewage discharge system for ship cargo hold sewage discharge. Background Technology

[0002] For electric ships, areas such as battery compartments have higher requirements for waterproofing and are more environmentally conscious, thus placing greater demands on the effective, reliable, and easy-to-maintain discharge of cargo hold sewage. Current technologies for cargo hold sewage discharge sometimes employ fixed-screen sludge pumps, with a fixed-aperture filter or grille at the pump's inlet to block large impurities. However, these filters or grilles are prone to clogging, requiring frequent manual cleaning. Furthermore, the fixed filtration accuracy cannot be adjusted based on the type of impurities; too small an aperture leads to clogging, while too large an aperture allows small impurities to enter the pump or pipes, causing damage or blockage. Other methods use sedimentation tanks with manual cleaning. These tanks settle impurities, and the upper sludge is pumped out by a sludge pump, with the sediment periodically cleaned manually. This method is inefficient, labor-intensive, and prone to causing foul odors or obstructing the view of the hold bottom if cleaning is not timely. Current technologies lack a cargo hold sewage discharge solution that is both easy to adjust the filter aperture to effectively filter impurities of different sizes, prevent pump and pipe blockage, and is also easy to clean, compact, and reliable. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by providing a filter structure and a sewage discharge system for ship cargo holds, thereby solving the problems of the inability to adjust the filter aperture and the inconvenience of cleaning during sewage discharge in existing technologies.

[0004] To achieve the above objectives, this utility model provides a filter structure for sewage discharge in ship cargo holds, which is installed in a sewage discharge pool at the bottom of the ship's cargo hold, comprising:

[0005] A cover plate, which is used to connect to the upper end of the sewage tank, and a through hole is provided in the middle of the cover plate;

[0006] A fixed filter cylinder is provided, the upper end of which is connected to the cover plate and communicates with the through hole, the lower end of which is provided with a first bottom plate, and the side wall of which is provided with a plurality of first filter holes.

[0007] A movable filter cartridge is rotatably disposed inside a fixed filter cartridge. The side wall of the movable filter cartridge has a plurality of second filter holes, which cooperate with the first filter holes. The size of the overlapping portion between the second filter holes and the first filter holes can be changed by rotating the movable filter cartridge relative to the fixed filter cartridge.

[0008] Optionally, the outer side wall of the movable filter cartridge is slidably engaged with the inner side wall of the fixed filter cartridge.

[0009] Optionally, a second base plate is provided at the lower end of the movable filter cartridge, and the second base plate is slidably engaged with the first base plate.

[0010] Optionally, the first base plate and the second base plate are respectively provided with a plurality of third filter holes and a plurality of fourth filter holes. The fourth filter holes cooperate with the third filter holes, and the size of the overlapping part of the fourth filter holes and the third filter holes can be changed by rotating the movable filter cylinder relative to the fixed filter cylinder.

[0011] Optionally, the first filter holes and the second filter holes are arranged in rows along the axial direction of the fixed filter cylinder and the movable filter cylinder, respectively, and multiple rows of the first filter holes and multiple rows of the second filter holes are arranged at intervals along the circumference of the fixed filter cylinder and the movable filter cylinder, respectively.

[0012] Optionally, the third filter hole and the fourth filter hole are arranged circumferentially on the first base plate and the second base plate, respectively.

[0013] Optionally, the cover plate is provided with two handles on its upper side.

[0014] Optionally, the upper end of the movable filter cartridge extends from the cover plate to form an extension, and the extension is non-rotatably connected to a handle.

[0015] This utility model also provides a ship cargo hold sewage discharge system, including:

[0016] A sewage discharge tank is located below the floor of the ship's cargo hold;

[0017] In the aforementioned ship cargo hold sewage discharge filtration structure, the cover plate is detachably connected to the upper end of the sewage discharge pool, and the fixed filter cylinder is embedded in the sewage discharge pool;

[0018] A sewage pump is installed at the bottom of the sewage tank.

[0019] The sewage outlet is located on the ship's side and is connected to the sewage pump via a sewage discharge pipe.

[0020] Optionally, it also includes a water treatment device connected between the sewage pump and the sewage outlet.

[0021] This utility model provides a filtration structure and a sewage discharge system for ship cargo holds. Its advantages are as follows: The filtration structure can be installed on the upper part of the sewage tank via a cover plate, allowing the fixed filter cylinder on the lower side of the cover plate to be embedded in the sewage tank. Sewage enters the sewage tank after passing through the second and first filter holes on the fixed and movable filter cylinders, achieving filtration. The movable filter cylinder is rotatably mounted inside the fixed filter cylinder. By rotating the movable filter cylinder, the position of the second filter hole relative to the first filter hole on the side wall of the movable filter cylinder can be changed. Only the overlapping portion of the second and first filter holes allows sewage to pass through, enabling convenient adjustment of the filter hole diameter. The filtration precision can be easily adjusted according to the main size of impurities in the ship's cargo hold, such as large pieces of garbage after cleaning or fine silt brought by rainwater. While ensuring effective interception of impurities to protect the sewage pump and sewage pipes, it minimizes the risk of blockage and improves sewage discharge efficiency. Furthermore, the filtration structure can be completely removed from the sewage tank for easy cleaning.

[0022] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0023] The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings, in which like reference numerals generally represent like parts.

[0024] Figure 1 A three-dimensional schematic diagram of a ship cargo hold sewage filtration structure according to an embodiment of the present invention is shown.

[0025] Figure 2 A schematic diagram of the cover plate and fixed filter cylinder of a ship cargo hold sewage discharge filter structure according to an embodiment of the present invention is shown.

[0026] Figure 3 A schematic diagram of the cover plate and movable filter cylinder of a ship cargo hold sewage discharge filter structure according to an embodiment of the present invention is shown.

[0027] Figure 4 A schematic diagram of a ship cargo hold sewage system according to an embodiment of the present invention is shown.

[0028] Figure 5 A partial structural schematic diagram of a ship cargo hold sewage system according to an embodiment of the present invention is shown.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Cover plate; 2. Fixed filter cylinder; 3. First base plate; 4. First filter hole; 5. Movable filter cylinder; 6. Second filter hole; 7. Second base plate; 8. Third filter hole; 9. Fourth filter hole; 10. Handle; 11. Handle; 12. Mounting hole; 13. Sewage tank; 14. Sewage pump; 15. Sewage outlet; 16. Water treatment device. Detailed Implementation

[0031] Preferred embodiments of the present invention will now be described in more detail. While preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0032] like Figures 1 to 3 As shown, this utility model provides a filter structure for sewage discharge in ship cargo holds, which is installed in a sewage discharge pool 13 at the bottom of the ship's cargo hold, and includes:

[0033] Cover plate 1 is used to connect to the upper end of the sewage tank 13, and a through hole is provided in the middle of the cover plate 1.

[0034] The fixed filter cylinder 2 is connected to the cover plate 1 at its upper end and communicates with the through hole. The lower end of the fixed filter cylinder 2 is provided with a first bottom plate 3. The side wall of the fixed filter cylinder 2 is provided with a plurality of first filter holes 4.

[0035] The movable filter cylinder 5 is rotatably disposed inside the fixed filter cylinder 2. The side wall of the movable filter cylinder 5 is provided with a plurality of second filter holes 6, which cooperate with the first filter holes 4. By rotating the movable filter cylinder 5 relative to the fixed filter cylinder 2, the size of the overlapping part of the second filter holes 6 and the first filter holes 4 can be changed.

[0036] Specifically, to address the problems of adjustable filter apertures and inconvenient cleaning during cargo hold sewage discharge in existing technologies, the filtration structure for cargo hold sewage discharge provided by this utility model can be installed on the upper end of the sewage tank 13 via a cover plate 1. This allows the fixed filter cylinder 2 on the lower side of the cover plate 1 to be embedded within the sewage tank 13. Sewage enters the sewage tank 13 after passing through the second filter hole 6 and the first filter hole 4 on the fixed filter cylinder 2 and the movable filter cylinder 5, achieving the filtration purpose. The movable filter cylinder 5 is rotatably mounted inside the fixed filter cylinder 2. By rotating the movable filter cylinder 5, the lateral position of the movable filter cylinder 5 can be changed. The second filter hole 6 on the wall is positioned relative to the first filter hole 4, with only the overlapping portion of the second filter hole 6 and the first filter hole 4 accommodating sewage. This allows for convenient adjustment of the filter hole diameter. The filtration precision can be easily adjusted according to the main size of impurities in the ship's cargo hold, such as a large amount of large pieces of garbage after cleaning or a large amount of fine silt brought by rainwater. This ensures effective interception of impurities to protect the sewage pump 14 and sewage pipes while minimizing the risk of blockage and improving sewage discharge efficiency. Furthermore, the ship's cargo hold sewage discharge filter structure can be completely removed from the sewage pool 13 for easy cleaning.

[0037] Optionally, the outer side wall of the movable filter cartridge 5 is slidably engaged with the inner side wall of the fixed filter cartridge 2.

[0038] Specifically, the fixed filter cylinder 2 and the cover plate 1 are connected to form an integrated structure. The movable filter cylinder 5 is rotatably inserted into the inner side of the fixed filter cylinder 2. The sliding fit between the outer side wall of the movable filter cylinder 5 and the inner side wall of the fixed filter cylinder 2 results in only a small gap between the side wall of the movable filter cylinder 5 and the side wall of the fixed filter cylinder 2. This facilitates the adjustment of the filter hole diameter and improves the anti-clogging performance. The unique double-layer cylindrical structure of the movable filter cylinder 5 and the fixed filter cylinder 2 allows water to flow through the small gap even if some filter holes are blocked by impurities. Compared with a single-layer fixed filter screen, it is less likely to be completely blocked.

[0039] Optionally, a second base plate 7 is provided at the lower end of the movable filter cartridge 5, and the second base plate 7 is slidably engaged with the first base plate 3.

[0040] Specifically, the first base plate 3 supports the movable filter cylinder 5, allowing the first filter cylinder to rotate within the fixed filter cylinder 2.

[0041] Optionally, the first base plate 3 and the second base plate 7 are respectively provided with a plurality of third filter holes 8 and a plurality of fourth filter holes 9. The fourth filter holes 9 cooperate with the third filter holes 8, and the size of the overlapping part of the fourth filter holes 9 and the third filter holes 8 can be changed by rotating the movable filter cylinder 5 relative to the fixed filter cylinder 2.

[0042] Specifically, the arrangement of the third filter hole 8 and the fourth filter hole 9 enables the first base plate 3 and the second base plate 7 to also have the ability to discharge sewage, thereby improving the sewage discharge efficiency. At the same time, the third filter hole 8 and the fourth filter hole 9 form the same fit as the first filter hole 4 and the second filter hole 6, which also makes it easy to adjust the filter hole diameter.

[0043] Optionally, the first filter hole 4 and the second filter hole 6 are arranged in rows along the axial direction of the fixed filter cylinder 2 and the movable filter cylinder 5, respectively, and multiple rows of the first filter hole 4 and multiple rows of the second filter hole 6 are arranged at intervals along the circumference of the fixed filter cylinder 2 and the movable filter cylinder 5, respectively.

[0044] Specifically, the first filter hole 4 and the second filter hole 6 are arranged in multiple rows, and the positions of the first filter hole 4 and the second filter hole 6 correspond to each other, that is, each row of the second filter hole 6 can completely overlap with each row of the first filter hole 4, or they can be completely staggered.

[0045] Optionally, the third filter hole 8 and the fourth filter hole 9 are arranged circumferentially on the first base plate 3 and the second base plate 7, respectively.

[0046] Specifically, the third filter hole 8 and the fourth filter hole 9 are arranged in a ring, and the positions of the third filter hole 8 and the fourth filter hole 9 correspond to each other. That is, each fourth filter hole 9 can completely overlap with each third filter hole 8, or they can be completely offset.

[0047] In this embodiment, when each row of second filter holes 6 can completely overlap with each row of first filter holes 4, each row of fourth filter holes 9 can completely overlap with each row of third filter holes 8.

[0048] Optionally, two handles 10 are provided on the upper side of the cover plate 1.

[0049] Specifically, two handles 10 are distributed on both sides of the fixed filter cylinder 2 and the movable filter cylinder 5, making it easy to remove the cover plate 1 together with the fixed filter cylinder 2 and the movable filter cylinder 5 as a whole.

[0050] In this embodiment, the handle 10 has a U-shaped structure, and both ends of the handle 10 are rotatably connected to the cover plate 1.

[0051] Optionally, the upper end of the movable filter cartridge 5 extends out to form a cover plate 1, forming an extension, and the extension is non-rotatably connected to a handle 11.

[0052] Specifically, the handle 11 is designed to facilitate the rotation of the movable filter cartridge 5.

[0053] In this embodiment, the handle 11 includes an arc-shaped main body, with rotating parts at both ends. The rotating parts are rotatably connected to the extension at the upper end of the movable filter cylinder 5, and can be tilted onto the upper side of the cover plate 1.

[0054] In this embodiment, mounting holes 12 are provided around the cover plate 1, which are used for its detachable installation on the upper end of the sewage tank 13.

[0055] like Figure 4 and Figure 5 As shown, this utility model also provides a ship cargo hold sewage discharge system, including:

[0056] Sewage pool 13 is located below the bottom plate of the ship's cargo hold;

[0057] The aforementioned filter structure for sewage discharge in ship cargo holds has a cover plate 1 that is detachably connected to the upper end of the sewage tank 13, and a fixed filter cylinder 2 that is embedded in the sewage tank 13.

[0058] Sewage pump 14 is installed at the bottom of sewage tank 13;

[0059] The sewage outlet 15 is located on the ship's side and is connected to the sewage pump 14 via a sewage discharge pipe.

[0060] Specifically, the sewage tank 13 is located at the lowest point of the ship's cargo hold, below the cargo hold floor or formed by partial subsidence of the cargo hold, and is used to collect accumulated water and settled impurities in the cargo hold. The sewage pump 14 can be installed at the bottom or lower side wall of the sewage tank 13, with its suction inlet located inside the tank, used to extract and pump out internal sewage, which can be discharged through the sewage outlet 15 on the ship's side. The aforementioned filtration structure for ship cargo hold sewage discharge is installed on the upper end of the sewage tank 13 via a cover plate 1, so that the fixed filter cylinder 2 and the movable filter cylinder 5 are embedded in the sewage tank 13, forming a double-layer filtration structure to intercept impurities in the sewage flowing into the sewage tank 13 while allowing sewage to pass through. The cover plate 1 can be opened manually, covering the inlet of the sewage tank 13, providing a flow and maintenance passage. The fixed filter cylinder 2 is a large-diameter cylinder with an opening at the top, and its cylinder wall has multiple first filter holes 4 evenly distributed along its circumference. The upper edge of the fixed filter cylinder 2 is welded to the lower surface of the cover plate 1, forming a... The filter cylinder 5 is an integral structure located in the central area of ​​the lower surface of the cover plate 1 and connected to the through hole. Its first base plate 3 supports the movable filter cylinder 5. The movable filter cylinder 5 is a small-diameter cylinder with an open diameter at the upper end that is slightly smaller than that of the fixed filter cylinder 2. Multiple second filter holes 6 are evenly opened along the circumference of its cylinder wall. The movable filter cylinder 5 can be coaxially set inside the fixed filter cylinder 2 and can rotate around its axis inside the fixed filter cylinder 2. For the adjustment of the filter hole diameter, by rotating the movable filter cylinder 5, the second filter holes 6 on the movable filter cylinder 5 and the first filter holes 4 on the fixed filter cylinder 2 are relatively displaced, that is, overlapped or staggered, thereby changing the size of the effective filter hole diameter formed by the overlapping area. Different rotation angles result in different effective filter hole diameters, realizing continuous adjustment of filtration accuracy. When all filter holes are completely overlapped, the effective hole diameter is the largest. When the filter holes are partially staggered, the effective hole diameter becomes smaller. When the holes are completely staggered, theoretically, the water flow can only pass through the small gap between the movable filter cylinder 5 and the fixed filter cylinder 2.

[0061] In this embodiment, the upper end of the sewage tank 13 is provided with a stepped structure, the cover plate 1 is fitted around the stepped structure, and the cover plate 1 can be fastened by fasteners and mounting holes 12.

[0062] Optionally, it also includes a water treatment device 16, which is connected between the sewage pump 14 and the sewage outlet 15.

[0063] Specifically, the water treatment device 16 is connected to the sewage pipe at the outlet of the sewage pump 14 for filtering, oil-water separation or other treatment of the pumped sewage. It can be set according to environmental protection requirements, and the treated water is discharged outside the ship.

[0064] In summary, when using the ship cargo hold sewage system provided by this utility model, taking a single working process as an example: the accumulated water in the ship's cargo hold, carrying impurities, flows to the sewage pool 13 at the bottom of the cargo hold. It first flows through the movable filter cylinder 5 and the fixed filter cylinder 2. The sewage passes through the effective filter holes of the fixed filter cylinder 2 and the movable filter cylinder 5, and the filtered sewage flows into the bottom of the sewage pool 13. The sewage pump 14 is started, which can suck in and pump out the sewage in the sewage pool 13. The pumped sewage is treated by the water treatment device 16, and the treated water that meets the discharge standards is discharged outside the ship. The intercepted impurities remain in the sewage pool 13 area outside the filter structure for ship cargo hold sewage discharge or adhere to the cylinder walls of the movable filter cylinder 5 and the fixed filter cylinder 2. They can be cleaned periodically as a whole by lifting the cover plate 1, together with the fixed filter cylinder 2 and the movable filter cylinder 5. The ship's cargo hold sewage filtration structure allows for easy adjustment of the effective filtration aperture by rotating the movable filter cylinder 5. This adjustment is convenient based on the size of the main impurities in the cargo hold, such as large pieces of debris after cleaning or fine silt brought in by rainwater. This ensures effective interception of impurities to protect pumps and pipelines while minimizing the risk of clogging and improving sewage discharge efficiency. The unique double-layer cylindrical structure of the movable filter cylinder 5 and the fixed filter cylinder 2 allows water to flow through the smaller gaps even if some filter holes are blocked by impurities, making it less prone to complete clogging compared to a single-layer fixed filter. The cover plate 1 is welded to the fixed filter cylinder 2 as a single unit. During maintenance, simply lift the handle 10 to open the cover plate 1, allowing the entire ship's cargo hold sewage filtration structure to be removed together. This greatly simplifies the disassembly, cleaning, and replacement process of the filter structure. The movable filter cylinder 5 can also be easily removed from the fixed cylinder for separate cleaning. Furthermore, the structure is compact and reliable. The filtration structure for ship cargo hold sewage discharge is located above the sewage tank 13, making full use of the bilge space of the ship's cargo hold. The cover plate 1 serves as a flow and maintenance channel, while also supporting the fixed filter cartridge 2 and the movable filter cartridge 5, resulting in a stable structure. The filtration structure effectively intercepts impurities, preventing them from entering the sewage pump 14, sewage pipes, and water treatment device 16, thus extending equipment life and reducing the failure rate. This ship cargo hold sewage discharge filtration structure is highly adaptable, particularly suitable for the cargo holds of electric ships with high requirements for sewage discharge reliability, and also applicable to other ship compartments requiring filtration and sewage discharge.

[0065] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A filter structure for sewage discharge in ship cargo holds, used in a sewage discharge pool at the bottom of a ship's cargo hold, characterized in that, include: A cover plate, which is used to connect to the upper end of the sewage tank, and a through hole is provided in the middle of the cover plate; A fixed filter cylinder is provided, the upper end of which is connected to the cover plate and communicates with the through hole, the lower end of which is provided with a first bottom plate, and the side wall of which is provided with a plurality of first filter holes. A movable filter cartridge is rotatably disposed inside a fixed filter cartridge. The side wall of the movable filter cartridge has a plurality of second filter holes, which cooperate with the first filter holes. The size of the overlapping portion between the second filter holes and the first filter holes can be changed by rotating the movable filter cartridge relative to the fixed filter cartridge.

2. The filter structure for ship cargo hold sewage discharge according to claim 1, characterized in that, The outer side wall of the movable filter cartridge slides into contact with the inner side wall of the fixed filter cartridge.

3. The filter structure for ship cargo hold sewage discharge according to claim 1, characterized in that, The lower end of the movable filter cylinder is provided with a second base plate, which slides in conjunction with the first base plate.

4. The filter structure for ship cargo hold sewage discharge according to claim 3, characterized in that, The first base plate and the second base plate are respectively provided with a plurality of third filter holes and a plurality of fourth filter holes. The fourth filter holes cooperate with the third filter holes. The size of the overlapping part of the fourth filter holes and the third filter holes can be changed by rotating the movable filter cylinder relative to the fixed filter cylinder.

5. The filter structure for ship cargo hold sewage discharge according to claim 1, characterized in that, The first filter hole and the second filter hole are arranged in rows along the axial direction of the fixed filter cylinder and the movable filter cylinder, respectively, and multiple rows of the first filter hole and multiple rows of the second filter hole are arranged at intervals along the circumference of the fixed filter cylinder and the movable filter cylinder, respectively.

6. The filter structure for ship cargo hold sewage discharge according to claim 4, characterized in that, The third filter hole and the fourth filter hole are arranged circumferentially on the first base plate and the second base plate, respectively.

7. The filter structure for ship cargo hold sewage discharge according to claim 1, characterized in that, The cover plate has two handles on its upper side.

8. The filter structure for ship cargo hold sewage discharge according to claim 1, characterized in that, The cover plate extends from the upper end of the movable filter cylinder to form an extension, and the extension is non-rotatably connected to a handle.

9. A ship cargo hold sewage discharge system, characterized in that, include: A sewage discharge tank is located below the floor of the ship's cargo hold; The filtration structure for ship cargo hold sewage discharge according to any one of claims 1-8, wherein the cover plate is detachably connected to the upper end of the sewage discharge pool, and the fixed filter cylinder is embedded in the sewage discharge pool; A sewage pump is installed at the bottom of the sewage tank. The sewage outlet is located on the ship's side and is connected to the sewage pump via a sewage discharge pipe.

10. The ship cargo hold sewage system according to claim 9, characterized in that, It also includes a water treatment device connected between the sewage pump and the sewage outlet.

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