Well cover structure for use in a cargo hold
Patent Information
- Application Number
- CN202522285098.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-29
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-10-29
AI Technical Summary
[0003]本实用新型的目的是提供一种用于货舱内的井盖结构，解决了货舱的压载井和污水井在压载和货物装载工况下井盖需频繁更换，操作繁琐的问题，
本实用新型能够将货舱内的压载井以及污水井密封，并且极大降低了井盖的更换时间和难度。在装货物时，需要将压载井密封，此时使下盖放置在压载井上，使压载井处于密封状态，污水井处于打开状态，使货物夹带的污水流入污水井中。在添加压舱水时，为防止压舱水进入到污水井中，将下盖放置在污水井上，使污水井处于密封状态，压载井处于打开状态。本实用新型可以根据实时情况对压载井或污水井密封，并且无需将用于下盖放置在舱外，极大降低了更换时间和难度。
Smart Images
Figure CN224833816U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a manhole cover structure for use in cargo holds, specifically a manhole cover structure capable of sealing sewage wells and ballast wells. Background Technology
[0002] Currently, to address the issue of insufficient stability when ships are empty or partially loaded in adverse sea conditions, ballast tanks are typically incorporated into ship designs. Ballast tanks lower the ship's center of gravity, ensuring safe navigation. Ballast manhole covers and sewage manhole covers are used in ballast tanks. Under normal loading conditions, ballast manholes require watertight covers to ensure watertightness, and sewage manholes use filter covers to discharge wastewater from the cargo holds. When encountering adverse sea conditions and the cargo holds need to act as storm ballast tanks to lower the ship's center of gravity, ballast manholes do not require sealing to maintain ballast water pressurization, and sewage manholes must be replaced with watertight covers to prevent ballast water leakage. Currently, during both loading scenarios, crew members need to place an additional set of watertight covers or filter covers and accessories outside the holds for replacement. This process involves lifting and handling, posing safety risks, and is cumbersome and time-consuming. Utility Model Content
[0003] The purpose of this invention is to provide a manhole cover structure for use in cargo holds, which solves the problem of frequent and cumbersome replacement of manhole covers for ballast wells and sewage wells under ballast and cargo loading conditions. To achieve the above objectives, the technical solution adopted by this utility model is as follows: A manhole cover structure for use in a cargo hold includes an upper cover and a lower cover, wherein the lower cover is provided with a first sealing ring for sealing; the lower cover can be configured on a ballast well and a sewage well to keep the ballast well and the sewage well in a sealed state.
[0004] Furthermore, well seat rings are provided on the inner walls of both the ballast well and the sewage well, and the well seat rings are located below the well opening; the upper cover and the lower cover are detachably fixed to the well seat rings by bolts.
[0005] Furthermore, a ballast well filter screen is also installed on the ballast well. The ballast well filter screen is connected to the well seat ring by connecting plate bolts, and a second sealing ring is provided at the bottom of the connecting plate.
[0006] Furthermore, the top cover includes a filter plate, a vertical plate, and a first fixing plate. The two ends of the filter plate are respectively connected to the vertical plate, and the bottom of the vertical plate is provided with the first fixing plate. The first fixing plate is connected to the well seat ring by bolts.
[0007] Furthermore, the lower cover includes a cover plate, and both ends of the cover plate are connected to a second fixing plate, which is bolted to the well seat ring.
[0008] Furthermore, the upper cover is provided with a handle for pulling up the upper cover.
[0009] Furthermore, the lower cover is provided with a handle for pulling up the lower cover.
[0010] Compared with the prior art, this utility model has the following advantages and beneficial effects: This invention can seal ballast wells and sewage wells in cargo holds, and greatly reduces the time and difficulty of replacing the well covers. When loading cargo, the ballast well needs to be sealed. At this time, the lower cover is placed on the ballast well, keeping the ballast well sealed while the sewage well is open, allowing sewage carried by the cargo to flow into the sewage well. When adding ballast water, to prevent ballast water from entering the sewage well, the lower cover is placed on the sewage well, keeping the sewage well sealed while the ballast well is open. This invention can seal ballast wells or sewage wells according to real-time conditions, and eliminates the need to place the lower cover outside the hold, greatly reducing replacement time and difficulty. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of a manhole cover structure used in a cargo hold.
[0012] Figure 2 This is a schematic diagram of the top cover.
[0013] Figure 3 This is a schematic diagram showing the lower cover placed at the ballast well.
[0014] Figure 4 A schematic diagram of opening the ballast well.
[0015] Figure 5 This is a top view of the bottom cover. Detailed Implementation
[0016] like Figure 1As shown, a manhole cover structure for use in a cargo hold includes an upper cover 1 and a lower cover 2. The lower cover 2 is provided with a first sealing ring 3 for sealing. The lower cover 2 can be disposed on a ballast well 4 and a sewage well 5, so that the ballast well 4 and the sewage well 5 are in a sealed state. A well seat ring 6 is provided on the inner wall of both the ballast well 4 and the sewage well 5, and the well seat ring 6 is located below the well opening. The upper cover 1 and the lower cover 2 are detachably fixed to the well seat ring 6 by bolts 7. When loading cargo into the cargo hold, in order to prevent sewage and other impurities carried on the cargo from entering the ballast well 4 and damaging the pipes and pumps in the ballast well 4, the ballast well 4 needs to be sealed. Simply placing the lower cover 2 on the ballast well 4 can achieve the sealing of the ballast well 4. The upper cover 1 is placed on the sewage well 5, at which time the sewage well 5 is in an open state, allowing sewage carried on the cargo to flow into the sewage well 5. When it is necessary to add ballast water to the ballast well 4, in order to prevent the ballast water from entering the sewage well 5, the lower cover 2 needs to be placed on the sewage well 5 to seal the sewage well 5. At this time, the lower cover 2 is connected to the well seat ring 6 by bolts 7, and the upper cover 1 is located above the lower cover 2 and is also connected to the well seat ring 6 by bolts 7. At this time, the sewage well 5 is sealed and the ballast well 4 is in the open state.
[0017] Existing technology requires that when sealing ballast well 4 and sewage well 5, sealing covers and accessories need to be retrieved from outside the hold. These covers are then placed on ballast well 4 and sewage well 5 for sealing. After use, the sealing covers are removed and placed outside the hold. This method makes replacing and moving the covers extremely cumbersome, significantly increasing the workload of the crew and resulting in low efficiency. This invention, however, makes the lower cover 2 a sealing cover. Whether ballast well 4 or sewage well 5 needs sealing, the lower cover 2 can be placed on them for sealing, eliminating the need to place the covers outside the hold. This greatly reduces the workload of the crew and improves efficiency.
[0018] like Figure 2 and Figure 3 As shown, a ballast well filter 13 is also installed on the ballast well 4. The ballast well filter 13 is connected to the well seat ring 6 by connecting plate bolts 7, and a second sealing ring 14 is provided at the bottom of the connecting plate. Figure 4 As shown, when the ballast well filter 13 is not in use, it will be placed inside the ballast well 4. When ballast water needs to enter the cargo hold, the ballast well filter 13 will flip to the top under the pressure of the water, effectively preventing impurities in the ballast water from entering the cargo hold.
[0019] The upper cover 1 includes a filter plate 15, a vertical plate 16, and a first fixing plate 17. The two ends of the filter plate 15 are connected to the vertical plate 16, and the first fixing plate 17 is located at the bottom of the vertical plate 16. The first fixing plate 17 is connected to the well seat ring 6 by bolts 7. The top surface of the filter plate 15 is lower than the bottom of the cargo hold, effectively preventing damage to the upper cover 1 when the forklift loads or unloads cargo. The filter plate 15 can filter larger particles of impurities carried in the cargo, preventing them from entering the sewage well 5. The lower cover 2 includes a cover plate 18, both ends of which are connected to second fixing plates 19. The second fixing plates 19 are connected to the well seat ring 6 by bolts 7, and the first sealing ring 3 is located below the second fixing plates 19. The top surface of the cover plate 18 is lower than the bottom of the cargo hold, effectively preventing damage to the lower cover 2 when the forklift loads or unloads cargo.
[0020] like Figure 5 As shown, the upper cover 1 is provided with a handle 11 for pulling up the upper cover 1. The upper cover 1 is relatively heavy, and it is easier to pull up the upper cover 1 by using the handle 11. The lower cover 2 is provided with a handle for pulling up the lower cover 2. The lower cover 2 is relatively heavy, and it is easier to pull up the lower cover 2 by using the handle.
[0021] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.
Claims
1. A manhole cover structure for use in a cargo hold, characterized in that, It includes an upper cover and a lower cover, wherein the lower cover is provided with a first sealing ring for sealing; the lower cover can be configured on the ballast well and the sewage well to keep the ballast well and the sewage well in a sealed state.
2. The manhole cover structure for use in a cargo hold according to claim 1, characterized in that, Both the ballast well and the sewage well are equipped with well seat rings on their inner walls, and the well seat rings are located below the well opening; the upper cover and the lower cover are detachably fixed to the well seat rings by bolts.
3. A manhole cover structure for use in a cargo hold according to claim 2, characterized in that, The ballast well is also equipped with a ballast well filter screen, which is connected to the well seat ring by bolts through a connecting plate. A second sealing ring is provided at the bottom of the connecting plate.
4. A manhole cover structure for use in a cargo hold according to claim 2, characterized in that, The top cover includes a filter plate, a vertical plate, and a first fixing plate. The two ends of the filter plate are respectively connected to the vertical plate, and the bottom of the vertical plate is provided with the first fixing plate. The first fixing plate is connected to the well seat ring by bolts.
5. A manhole cover structure for use in a cargo hold according to claim 2, characterized in that, The lower cover includes a cover plate, and both ends of the cover plate are connected to a second fixing plate, which is bolted to the well seat ring.
6. A manhole cover structure for use in a cargo hold according to claim 1, characterized in that, The top cover is provided with a handle for pulling up the top cover.
7. A manhole cover structure for use in a cargo hold according to claim 1, characterized in that, The lower cover is provided with a handle for pulling up the lower cover.