Seabed grating meeting CCR and BIS requirements

Abstract

A seabed grid meeting CCR and BIS requirements is characterized in that the grid is provided with an outer frame, a plurality of transverse round steel bars are arranged in the outer frame, the adjacent round steel bars are arranged in a front-back staggered mode, two round steel bar layers are formed in the outer frame, and a balancing weight is arranged in the center of the bottom of the grid; the grating is located in the surrounding plate, eye plates protruding outwards are arranged on the two sides of the outer frame, the rotating shaft penetrates through the two eye plates to connect the grating with the surrounding plate, and the grating can turn over around the rotating shaft relative to the surrounding plate. A plurality of baffles are arranged on the periphery of the grating and located on one side of the grating, the baffles protrude out of the outer frame, and when the grating is closed, the baffles are connected with the coaming. According to the seabed grating, the round steel layering design is adopted, the distance between the two round steel is increased to 62 mm, therefore, the circulation area occupied by the round steel is still 1 / 3, meanwhile, in order to guarantee the strength of the seabed grating, the round steel is divided into the upper layer and the lower layer, the staggered-layer design is adopted, and through the round steel staggered-layer mode, the strength of the seabed grating is guaranteed, and it is also guaranteed that the circulation area of the seabed grating is not changed.

Description

Technical Field

[0001] The invention belongs to the field of ship construction and design, and in particular relates to a seabed grid meeting CCR and BIS requirements. Background Art

[0002] At present, we often use standard submarine grilles, which are all in the form of flat steel. The advantage of flat steel submarine grilles is that the flat iron has high strength and does not occupy a large flow area. That is, while ensuring the strength of the submarine grille, the flow area of ​​the submarine grille is maximized. It is currently the most suitable profile for submarine grilles.

[0003] However, for some projects, when the shipowner requires compliance with CCR 2298.3 biological sludge management regulations, conventional seabed grids cannot meet the requirements, because according to the provisions of CCR 2298.3 biological sludge management regulations, the seabed grid needs to use round steel instead of the flat steel in the original grid.

[0004] In addition, according to the specification requirements of the BIS symbol: the seabed grid is required to have a counterweight to facilitate underwater workers to open the seabed grid more easily during maintenance. Therefore, it is necessary to add a counterweight to the seabed grid.

[0005] At the same time, the current conventional subsea grilles adopt a hinged form, which has certain requirements for the hull structure in the subsea valve box. On-site construction personnel are required to research and match the hinges according to the structural position. At the same time, for ships with a large linear tightening arc of the hull, the subsea grilles often cannot be opened.

[0006] Therefore, it is necessary to design a new type of submarine grid. Summary of the invention

[0007] In order to solve the above problems, the present invention provides a submarine grid that meets the requirements of CCR and BIS, aiming to achieve the purpose of meeting the requirements of the specification while ensuring that the opening size of the original standard grid remains unchanged and the flow area is guaranteed. The technical solution adopted is:

[0008] A submarine grid that meets the requirements of CCR and BIS comprises a vertically arranged grid with an external frame, a plurality of horizontal round steels are arranged in the external frame, adjacent round steels are staggered front and back to form two layers of round steel in the external frame, and a counterweight is arranged at the bottom center of the grid.

[0009] The grille is located inside the enclosure, and eye plates protruding outward are provided on both sides of the external frame. The two eye plates are symmetrically arranged, and the rotating shaft passes through the two eye plates to connect the grille to the enclosure. The grille can be flipped around the rotating shaft relative to the enclosure. Fixed nuts are provided at both ends of the rotating shaft, and a through hole is provided on the rotating shaft outside the nut, and the cotter pin is inserted into the through hole.

[0010] A plurality of baffles are arranged around the grille, and the plurality of baffles are located on one side of the grille. The baffles protrude from the external frame, and when the grille is closed, the baffles are connected to the enclosure.

[0011] The above-mentioned submarine grid that meets the requirements of CCR and BIS, further, the diameter of the round steel is 12mm.

[0012] The above-mentioned submarine grid meeting the requirements of CCR and BIS, further, has a spacing of 62 mm between two adjacent round steels.

[0013] The above-mentioned submarine grid that meets the requirements of CCR and BIS further has four corners of the enclosure plate adopting arc-shaped transition structures.

[0014] The above-mentioned submarine grid meeting the requirements of CCR and BIS further has a gasket arranged between the fixing nut and the enclosure.

[0015] The above-mentioned submarine grid meeting the requirements of CCR and BIS further has five baffles arranged on the grid.

[0016] The present invention discloses a submarine grille that can meet the requirements of CCR and BIS. It adopts the form of round steel to replace the flat steel on the conventional submarine grille. At the same time, a counterweight is added at an appropriate position of the submarine grille, and an intermediate round steel hinge is adopted to facilitate the installation and use of the submarine grille. The difficulty of on-site construction is reduced, and it is suitable for ships with various outer plate curvatures. The circulation area occupied by the round steel is still 1 / 3. At the same time, in order to ensure the strength of the submarine grille, the round steel is divided into two layers, and a staggered design is made. Through the staggered design of the round steel, the strength of the submarine grille is guaranteed, and the circulation area of ​​the submarine grille is also guaranteed.

[0017] Under the premise of ensuring the same opening size as the original standard grille and ensuring the flow area, the new type of round steel seabed grille that can meet the requirements of CCR and BIS specifications can cope with more stringent specifications. At the same time, this type of seabed grille is also more friendly to underwater workers. It does not have the edges and corners of flat steel grilles, so workers are not easily hurt. In addition, the seabed grille body is equipped with a counterweight to facilitate personnel to open and close the seabed grille, making the maintenance of the seabed box more convenient. In addition, this type of seabed grille has lower structural requirements for the seabed box, which is more conducive to the layout of the seabed grille in the seabed box and on-site construction and installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view structural schematic diagram of the present invention;

[0019] Figure 2 It is a side view structural schematic diagram of the present invention;

[0020] Figure 3 It is a schematic diagram of the structure of the connection between the rotating shaft and the eye plate;

[0021] Among them, 1-enclosure, 2-rotating shaft, 3-fixing nut, 4-gasket, 5-through hole, 6-eye plate, 7-counterweight, 8-baffle, 9-round steel. DETAILED DESCRIPTION

[0022] like Figure 1 , 2 As shown, a submarine grid that meets the requirements of CCR and BIS has a vertically arranged grid with an external frame. A plurality of horizontal round steels are arranged in the external frame. The diameter of the round steels is 12 mm. Adjacent round steels are staggered front and back to form two layers of round steel layers in the external frame. A counterweight is arranged at the center of the bottom of the grid. The grid is located in the enclosure. Eye plates protruding outward are arranged on both sides of the external frame. The two eye plates are symmetrically arranged. The rotating shaft passes through the two eye plates to connect the grid to the enclosure. The grid can be flipped around the rotating shaft relative to the enclosure.

[0023] The grille is located inside the enclosure, and eye plates protruding outward are provided on both sides of the external frame. The two eye plates are symmetrically arranged, and the rotating shaft passes through the two eye plates to connect the grille to the enclosure. The grille can be flipped around the rotating shaft relative to the enclosure. Fixed nuts are provided at both ends of the rotating shaft, and a through hole is provided on the rotating shaft outside the nut, and the cotter pin is inserted into the through hole.

[0024] A plurality of baffles are arranged around the grille, and the plurality of baffles are located on one side of the grille. The baffles protrude from the external frame, and when the grille is closed, the baffles are connected to the enclosure.

[0025] The grille needs to consider the impact of round steel on the seawater circulation area. The present invention adopts a layered design of round steel. The distance between two round steels is increased to 62mm. Therefore, the circulation area occupied by the round steel is still 1 / 3. At the same time, to ensure the strength of the submarine grille, the round steel is divided into two layers, upper and lower, and a staggered design is made. The staggered design of the round steel ensures the strength of the submarine grille and the flow area of ​​the submarine grille remains unchanged.

Claims

1. A subsea grid meeting the requirements of CCR and BIS, characterized in that: A vertically arranged grille is provided with an external frame, a plurality of horizontal round steels (9) are arranged in the external frame, adjacent round steels are arranged in a staggered manner front to back, and two layers of round steel are formed in the external frame, and a counterweight block (8) is arranged at the center of the bottom of the grille; The grille is located inside the enclosure (1), and eye plates (6) protruding outward are arranged on both sides of the external frame, the two eye plates are symmetrically arranged, and the rotating shaft (2) passes through the two eye plates to connect the grille with the enclosure, and the grille can be turned around the rotating shaft relative to the enclosure; fixing nuts (3) are matched at both ends of the rotating shaft, and a through hole (5) is opened on the rotating shaft outside the nut, and a split pin is inserted into the through hole; A plurality of baffles (8) are arranged around the grille. The plurality of baffles are located on one side of the grille. The baffles protrude from the external frame. When the grille is closed, the baffles are connected to the enclosure.

2. A subsea grid meeting CCR and BIS requirements according to claim 1, characterized in that: The diameter of the round steel is 12mm.

3. A subsea grid meeting CCR and BIS requirements according to claim 1, characterized in that: The distance between two adjacent round steel bars is 62mm.

4. A subsea grid meeting CCR and BIS requirements according to claim 1, characterized in that: The four corners of the enclosure adopt an arc-shaped transition structure.

5. A subsea grid meeting CCR and BIS requirements according to claim 1, characterized in that: A gasket is arranged between the fixing nut and the enclosure plate.

6. A subsea grid meeting CCR and BIS requirements according to claim 1, characterized in that: There are 5 baffles on the grille.

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