Fire door structure mountable in high stress areas of a ship structure

Abstract

The application discloses a fireproof door structure which can be installed in a high stress area of a ship structure, and belongs to the technical field of ship structures. The door hole comprises a door frame, and the profile line of the door frame comprises a plurality of straight lines; the fireproof door comprises a door sleeve; a corner hole in the shape of a circular arc is arranged between two adjacent straight lines; the two ends of the profile line of the corner hole are connected to the two adjacent straight lines respectively; and the rear end surface of the steel wall is fixedly provided with a patch capable of covering the profile line of the corner hole. The application can meet the requirement of the structural strength of the high stress area, is simple in configuration, convenient to use, and convenient for ship owners to use in operation.

Description

Technical Field

[0001] This invention relates to the field of marine technology, and in particular to a fire door structure that can be installed in high-stress areas of a ship's structure. Background Technology

[0002] Stress concentration issues can easily occur at the right-angle openings of fire doors. Fire doors are widely deployed in the superstructure areas of ships, where structural stress is generally low, making structural damage caused by cabin door openings less likely. However, when fire doors are located in areas of high stress, such as on the main supporting structures of the hull, the corners of the openings are highly susceptible to structural cracks due to high stress, thus affecting the structural safety of the ship.

[0003] For situations where doors need to be installed in high-stress areas of ship structures, the following methods are currently commonly used: (1) Method 1: Install metal doors with rounded corners; (2) Method 2: Thicken the structure to install fire doors; (3) Method 3: Set up a false door structure to reduce the stress in the door opening area.

[0004] Method 1 has the following drawbacks: the metal door has a larger rounded corner, which alleviates the stress concentration problem at the opening, but this type of marine door has a complex structure, is heavy, inconvenient to open, increases shipyard costs, and is not conducive to the shipowner's later use.

[0005] Method 2 has the following drawbacks: The stress concentration coefficient at the corner of the opening of a conventional fire door is extremely high. If the stress is reduced by thickening the structural plate, the cost is extremely high. In extreme cases, it may not even be possible to reduce the stress to the allowable standard. Even if the strength requirements can be met, it will increase the number of ship production parts, increase the production and construction workload, and increase the empty weight of the ship. Considering the thickness restrictions of marine steel, this method has certain limitations.

[0006] Method 3 has the following drawbacks: The false door structure in the high stress zone can be designed with a reasonable opening form according to the actual stress level of the ship, and the fire door can be placed in a position with lower stress. However, this method will occupy some cabin space, which is not suitable for ships with compact layout. At the same time, it increases the number of parts and the amount of construction work. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the above-mentioned defects of the prior art and provide a fire door structure that can be installed in the high stress area of ​​the ship structure.

[0008] The present invention solves the above-mentioned technical problems through the following technical solution:

[0009] A fire door structure that can be installed in high-stress areas of a ship structure includes a door opening formed in a steel wall for installing the fire door; the outline of the door opening includes several straight sides; the fire door includes a door frame fixed to the front end face of the steel wall; an arc-shaped corner hole is formed between two adjacent straight sides; the two ends of the outline of the corner hole are respectively connected to the two adjacent straight sides; a patch plate that can cover the outline of the corner hole is fixed to the rear end face of the steel wall; the outer outline of the door frame is located outside the outline of the corner hole.

[0010] Furthermore, the inner edge of the patch has a profile line that is flush with the straight edges that connect to the two ends of the profile line of the corner hole.

[0011] Furthermore, the doorway has four straight sides, and the inner edge of the patch and the straight sides of the doorway form a rectangular frame.

[0012] Furthermore, corner holes and patch plates are provided at each right angle of the rectangular frame.

[0013] Furthermore, the outline of the corner hole is located outside the straight edge connecting the two ends of the corner hole's outline.

[0014] Furthermore, the distance from the outermost end of the corner hole's outline to the straight edge is not less than 40mm.

[0015] Furthermore, the inner edge of the patch is not fixed to the door frame.

[0016] Furthermore, the outer edge of the patch is fixed to the steel wall.

[0017] Furthermore, the radius of the arc of the corner hole's outline is not less than 100mm.

[0018] Furthermore, the door frame and the patch plate at the corner hole location are connected by bolts.

[0019] The beneficial effects of the present invention are as follows: the fire door structure of the present invention can meet the structural strength requirements of high stress areas and the structural strength requirements of ships, effectively prevent the cracking of structural steel plates, without adding extra weight to the hull, without occupying extra cabin space, without adding extra production costs, and is simple to configure and easy to use. It does not occupy extra cabin space and is convenient for ship owners to use in operation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention.

[0021] Figure 2 for Figure 1 Schematic diagram of sectional view AA.

[0022] Figure 3 for Figure 1 Schematic diagram of the BB section.

[0023] Figure 4 This is a schematic diagram of the structure of a doorway according to a preferred embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of the doorway structure after the connecting patch plate is installed according to a preferred embodiment of the present invention.

[0025] Figure 6 This is a schematic diagram of the structure of the door frame connected to the door opening according to a preferred embodiment of the present invention.

[0026] Figure 7 This is a schematic diagram of the corner node structure of a preferred embodiment of the present invention.

[0027] Figure 8 for Figure 7 Schematic diagram of the middle patch plate structure. Detailed Implementation

[0028] The present invention will be described more clearly and completely below with reference to a preferred embodiment and the accompanying drawings.

[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, a fire door structure that can be installed in high-stress areas of a ship structure includes a door opening 20 formed in the steel wall 10 for installing the fire door.

[0030] The fire door includes a door frame 12 fixed to the front end of the steel wall 10 and a door leaf 11 installed on the door frame.

[0031] The outline of the doorway 20 includes several straight edges 21. An arc-shaped corner hole 22 is provided between two adjacent straight edges 21; the two ends of the outline 23 of the corner hole are respectively connected to the two adjacent straight edges 21. The arc radius R of the outline 23 of the corner hole is not less than 100mm.

[0032] A patch plate 30 is fixed to the rear end face of the steel wall 10, which can cover the outline 23 of the corner hole. The inner edge of the patch plate 30 has an outline that is flush with the straight edges that connect to the two ends of the outline 23 of the corner hole.

[0033] In this embodiment, the door opening 20 has four straight sides, and the inner edge of the patch plate 30 and the straight sides of the door opening 20 form a rectangular frame. A corner hole 22 and a patch plate 30 are provided at each right angle of the rectangular frame.

[0034] The outline 23 of the corner hole is located outside the straight edge 21 connecting the two ends of the outline 23 of the corner hole; the outline 23 of the corner hole is located outside the rectangular frame. The distance 'a' from the outermost end of the outline 23 of the corner hole to the straight edge 21 is not less than 40mm.

[0035] The inner edge of the patch plate 30 is not fixed to the door frame 12; the outer edge of the patch plate 30 is fixed to the steel wall 10. Both the patch plate and the door frame are metal parts, and metal parts are usually fixed to each other by welding. Therefore, the inner edge of the patch plate is not welded to the door frame; the outer edge of the patch plate is welded to the steel wall.

[0036] The outline of the door frame 12 is located outside the outline of the corner hole 23.

[0037] The door frame and the patch plate 30 at the corner hole position, and the door frame and the steel wall 10 at the straight edge position are all connected by bolts 13.

[0038] Figure 8 for Figure 7 The schematic diagram of the middle patch plate structure should be noted. Figure 8 The double-dotted line marked 23' is the projection line of the corner hole outline 23. This is only to illustrate the positional relationship between the corner hole outline and the patch plate. In fact, this projection line does not exist on the patch plate.

[0039] The fire door structure of the present invention does not require changes to the original door leaf design. The corners of the door opening adopt a large rounded corner design, the patch plate is set on the back of the steel wall, the door frame is set on the front of the steel wall, the width of the door frame completely covers the opening and is fixed to the ship structure with bolts, and the door leaf and door frame are connected in a conventional way to complete the installation of the fire door.

[0040] The corners adopt a large rounded corner design, with the radius R of the arc of the corner hole outline not less than 100mm. The large rounded corner position plays a stress-relieving role and will not generate an excessive stress concentration coefficient, thus solving the problem of corner cracking in the doorway and ensuring the structural strength of the ship.

[0041] The center position of the corner hole outline is adjustable, allowing for reasonable control of the hole shape and door frame width. By adjusting the center position at the rounded corner, the original rectangular corner is made as close as possible to the edge of the round hole, ensuring that the door frame width will not be too large later, with 'a' not less than 40mm. Adjusting the center position of the round hole ensures sufficient installation space for the cabin door.

[0042] The outer edge shape of the patch is determined based on the characteristics of its location and the shipyard's construction requirements. The inner edge contour of the patch matches the fire door installation requirements, completing the door opening shape and effectively blocking smoke, fire, noise, etc., to meet the performance requirements of the fire door. The patch is designed to ensure airtightness, and its shape ensures proper fire door installation.

[0043] The outer edge of the patch plate is welded to the steel wall of the ship, while the inner edge is not welded to the door frame, ensuring that the structural stress at this point does not adversely affect the door frame, door leaf, etc.

[0044] The outer contour of the door frame is located outside the contour of the corner hole. Usually, the contour of the door frame covers the a+10mm area outside the door opening to ensure performance requirements such as airtightness, fire resistance, and sound insulation, while also ensuring the aesthetics after installation.

[0045] The fire door structure of this invention can meet the structural strength requirements of high stress areas and ship structural strength requirements, effectively prevent structural steel plate cracking, does not increase the weight of the hull, does not occupy additional cabin space, does not increase production costs, is simple to configure, is easy to use, and does not occupy additional cabin space, making it convenient for ship owners to use in operation.

[0046] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A fire door structure mountable in a high stress area of a ship structure, comprising a door opening in a steel wall for mounting a fire door, the outline of the door opening comprising straight edges, the fire door comprising a door pocket fixed to the front face of the steel wall, characterized in that, The corner hole is arc-shaped, and the two ends of the contour line of the corner hole are connected to the two adjacent straight lines, respectively; the rear end surface of the steel wall is fixedly provided with a patch capable of covering the contour line of the corner hole; the outer contour line of the door pocket is located outside the contour line of the corner hole; the inner edge of the patch has a contour line flush with the straight line connected to the two ends of the contour line of the corner hole, respectively; the door hole has four straight lines, and the inner edge of the patch and the straight lines of the door hole form a rectangular frame; the inner edge of the patch is not welded with the door pocket; the outer edge of the patch is welded with the steel wall; the door pocket and the patch at the position of the corner hole, and the door pocket and the steel wall at the position of the straight line are connected through bolts; the radius of the arc of the contour line of the corner hole is not less than 100 mm.

2. The fire door structure mountable to a high stress area of a marine vessel structure of claim 1, wherein, The rectangular frame is provided with a corner hole and a patch at each right angle.

3. The fire door assembly mountable to a high stress area of a marine vessel structure of claim 1, wherein, The contour line of the corner hole is located outside the straight line connected to the two ends of the contour line of the corner hole.

4. The fire door structure mountable to a high stress area of a marine vessel structure of claim 3, wherein, The distance from the outermost end of the contour line of the corner hole to the straight line is not less than 40 mm.

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