A protective box for sound and light alarm devices

Abstract

This utility model discloses a protective box for an audible and visual alarm, applied to a ship's cargo hold. A base plate is mounted on a mounting frame in the cargo hold, and the audible and visual alarm is mounted on the base plate, which also houses a cable packing gland. The box body is detachably mounted on the base plate, forming an inner cavity between the box body and the base plate to accommodate the audible and visual alarm. A first sealing part is located between the base plate and the box body; a second sealing part is located within the cable packing gland. Under normal operating conditions, the box body is open, and the audible and visual alarm is exposed. Under storm ballast conditions, the box body is closed, and the audible and visual alarm is located within the inner cavity. This design ensures that the audible and visual alarm is protected from mechanical damage and seawater immersion, extending the equipment's service life.

Description

Technical Field

[0001] This utility model relates to the field of marine equipment technology, and in particular to a protective box for an audible and visual alarm. Background Technology

[0002] Currently, large bulk carriers are required to be equipped with carbon dioxide release systems, which must include audible and visual alarms for pre-release warnings. These alarms, installed in cargo holds, are susceptible to mechanical damage due to their location being a hazardous area. Some bulk carrier cargo holds are used as storm ballast tanks, filling with water during storms. In such cases, the alarms must be removed to prevent water damage, and then reinstalled after the storm ballast is completed and the water is drained. This repeated process is time-consuming, labor-intensive, and prone to equipment damage.

[0003] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Summary of the Invention

[0004] In response to the problems mentioned in the background art, this utility model proposes a protective box for audible and visual alarm devices, which can ensure that the audible and visual alarm devices are not subject to mechanical damage and seawater immersion, thereby extending the service life of the equipment.

[0005] To achieve the above-mentioned objectives, the present invention employs the following technical solution:

[0006] In some embodiments of this application, a protective enclosure for an audible and visual alarm is provided, applied to a ship's cargo hold, comprising:

[0007] A floor plate is mounted on the mounting frame of the cargo hold, an audible and visual alarm is mounted on the floor plate, and a cable packing gland is provided on the floor plate.

[0008] The enclosure is detachably mounted on the base plate, and an inner cavity for accommodating the audible and visual alarm is formed between the enclosure and the base plate.

[0009] A first sealing part is disposed between the bottom plate and the housing, and the first sealing part is configured to prevent external water from entering the inner cavity;

[0010] A second sealing part is disposed inside the cable stuffing box and is configured to prevent external water from entering the inner cavity;

[0011] Under normal operating conditions, the cargo hold has the container in an open state, the container is separated from the bottom plate, and the audible and visual alarm is exposed.

[0012] During storm ballast conditions, the cargo hold is in a closed state, with the cargo hold and the bottom plate closed, and the audible and visual alarm is located in the inner cavity.

[0013] In some embodiments of this application, a plurality of first connecting portions are provided on the base plate, and the plurality of first connecting portions are arranged at intervals along the circumference of the base plate; a plurality of second connecting portions are provided on the housing, and the plurality of second connecting portions are arranged at intervals along the circumference of the housing; the plurality of first connecting portions and the plurality of second connecting portions are correspondingly provided, and the upper and lower corresponding first connecting portions and second connecting portions are connected by connectors.

[0014] In some embodiments of this application, the connector includes a bolt and a nut, the bolt being rotatably connected to the first connecting part via a rotating shaft, and the second connecting part having a through hole for the bolt to pass through.

[0015] In some embodiments of this application, the perforation is an open hole, and after the nut is released from the bolt, the bolt rotates around the pivot axis to the outside of the housing, and the bolt is released from the perforation.

[0016] In some embodiments of this application, the housing is provided with a handle.

[0017] In some embodiments of this application, a fixing plate is provided on the base plate, and the fixing plate is fixed to the mounting frame of the cargo compartment by a connector.

[0018] In some embodiments of this application, the first sealing part is a sealing strip.

[0019] In some embodiments of this application, the second sealing part is a sealing ring.

[0020] Compared with the prior art, the advantages and positive effects of this utility model are:

[0021] The protective box for the audible and visual alarm provided in this application effectively solves the technical problems in the prior art of audible and visual alarms in the cargo holds of large bulk carriers being susceptible to mechanical damage and requiring repeated disassembly and reassembly under storm ballast conditions through targeted structural design.

[0022] The protective box houses the audible and visual alarm through the inner cavity formed by the bottom plate and the box body. During normal cargo hold operations, the box body can form a physical barrier for the alarm, reducing mechanical damage such as collisions and scratches that may occur during cargo handling and equipment maintenance. At the same time, the sealed structure design further prevents dust, moisture and other impurities from corroding the core components of the alarm, extending the service life of the equipment.

[0023] To address the specific needs of using cargo holds as storm ballast tanks, the protective container employs a detachable connection between the container body and the bottom plate: before ballasting, simply closing the container prevents seawater from entering the inner cavity through the double sealing effect of the first and second sealing parts, eliminating the need to disassemble the audible and visual alarm; after ballasting, opening the container restores the alarm to normal operation. This design eliminates the traditional steps of repeated disassembly and assembly, significantly shortening operation time, reducing labor costs, and avoiding secondary damage such as equipment bumps and loose wiring that may occur during disassembly and assembly.

[0024] The protective enclosure constructs a complete sealing system through the coordinated action of the first sealing part (between the bottom plate and the enclosure body) and the second sealing part (inside the cable stuffing box). In the event of water accumulation in the cargo hold or in a high-humidity environment, this system can effectively prevent external moisture from entering, ensuring that the control components, flashing lights, horns, and other critical components of the audible and visual alarm are not affected by water immersion. This guarantees the strength and response speed of the audible and visual signals during pre-release warnings, meeting the reliability requirements of ship safety regulations for alarm systems.

[0025] Other features and advantages of this utility model will become clearer after reading the detailed embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a structural schematic diagram of a ship's cargo hold according to some embodiments;

[0028] Figure 2 This is a structural diagram of a protective box for an audible and visual alarm according to some embodiments;

[0029] Figure 3 A side view of a protective box for an audible and visual alarm according to some embodiments;

[0030] Figure 4 This is a structural diagram of the protective box after it is opened, according to some embodiments.

[0031] Figure label:

[0032] 100. Cargo hold; 110. Mounting rack;

[0033] 200. Protective box; 210. Base plate; 211. First connecting part; 212. Fixing plate; 220. Box body; 221. Second connecting part; 222. Perforation; 230. Connecting piece; 231. Bolt; 232. Nut; 240. Stuffing box; 250. Handle; 260. First sealing part;

[0034] 300. Audible and visual alarm; 310. Control component; 320. Flashing light; 330. Horn; 340. Lamp cover. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0037] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0038] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0041] In some embodiments of this application, a protective box for an audible and visual alarm is provided and applied to a ship's cargo hold 100. Figure 1 This is a schematic diagram of a ship's cargo hold 100. A mounting bracket 110 is located near the upper part of the cargo hold 100, and the audible and visual alarm 300 is mounted on the mounting bracket 110. The protective case 200 of this application is used to protect the audible and visual alarm 300, preventing mechanical damage and water immersion. Figure 2 This is a structural diagram of a protective box for an audible and visual alarm. Figure 3 This is a side view of a protective box for an audible and visual alarm. Figure 3 This is a structural diagram of an audible and visual alarm 300 mounted on a base plate 210.

[0042] The audible and visual alarm 300 is a component in the prior art, including a control component 310, a flashing light 320, a horn 330, a lampshade 340, etc. The specific structure of the audible and visual alarm 300 can be referred to in the prior art, and will not be described in detail in this embodiment.

[0043] The protective box 200 includes a base plate 210, a box body 220, a first sealing part 260, and a second sealing part (not shown).

[0044] The protective enclosure 200 includes a base plate 210. The base plate 210 is mounted on the mounting bracket 110 of the cargo hold 100, and the audible and visual alarm 300 is mounted on the base plate 210. A cable stuffing box 240 is provided on the base plate 210. The cable passes through the stuffing box 240 to connect to the audible and visual alarm 300.

[0045] The protective case 200 also includes a case body 220. The case body 220 is detachably mounted on the base plate 210. The case body 220 and the base plate 210 form an inner cavity for accommodating the audible and visual alarm 300.

[0046] The protective enclosure 200 also includes a first sealing part 260. The first sealing part 260 is disposed between the bottom plate 210 and the enclosure body 220, and is configured to prevent external water from entering the inner cavity of the protective enclosure 200.

[0047] The protective enclosure 200 also includes a second sealing section. The second sealing section is disposed within the cable stuffing box 240 and is configured to prevent external water from entering the interior cavity of the protective enclosure 200.

[0048] In the cargo hold 100, under normal operating conditions, the container 220 is in the open state, the container 220 is separated from the bottom plate 210, and the audible and visual alarm 300 is exposed.

[0049] During storm ballast conditions, the cargo hold 100 has its container 220 closed, with the container 220 and the bottom plate 210 in a closed state, and the audible and visual alarm 300 located in the inner cavity.

[0050] The protective box for the audible and visual alarm provided in this application effectively solves the technical problems in the prior art where the audible and visual alarm 300 inside the cargo hold of a large bulk carrier is susceptible to mechanical damage and requires repeated disassembly and reassembly under storm and ballast conditions.

[0051] The protective box 200, through the inner cavity formed by the base plate 210 and the box body 220, houses the audible and visual alarm 300. During normal operation of the cargo hold 100, the box body 220 can form a physical barrier for the alarm, reducing mechanical damage such as collisions and scratches that may occur during cargo handling and equipment maintenance. At the same time, the sealed structure design further avoids the corrosion of the core components of the alarm by dust, water vapor and other impurities, extending the service life of the equipment.

[0052] To address the specific needs of cargo hold 100 when used as a storm ballast tank, the protective enclosure 200 employs a detachable connection between the enclosure body 220 and the bottom plate 210. Before ballasting, simply closing the enclosure body 220 prevents seawater from entering the inner cavity through the double sealing effect of the first sealing part 260 and the second sealing part, eliminating the need to disassemble the audible and visual alarm 300. After ballasting, opening the enclosure body 220 restores the alarm to normal operation. This design eliminates the traditional steps of repeated disassembly and assembly, significantly shortening operation time, reducing labor costs, and avoiding secondary damage such as equipment bumps and loose wiring that may occur during disassembly and assembly.

[0053] The protective enclosure 200 constructs a complete sealing system through the coordinated action of the first sealing part 260 (between the bottom plate 210 and the enclosure 220) and the second sealing part (inside the cable stuffing box 240). In the event of water accumulation or high humidity in the cargo hold 100, this system can effectively prevent external moisture from entering, ensuring that key components of the audible and visual alarm 300, such as the control components 310, flashing light 320, and horn 330, are not affected by water immersion, guaranteeing the intensity and response speed of the audible and visual signals during pre-release warnings, and meeting the reliability requirements of ship safety regulations for alarm systems.

[0054] The components of the protective box 200 (base plate 210, box body 220, sealing part, etc.) have a simple structure and mature manufacturing process. It can be modularly designed according to the size of different models of audible and visual alarms 300, and has strong adaptability. At the same time, its installation method is compatible with the existing mounting frame 110 of the cargo hold 100, without the need for large-scale modification of the cargo hold 100 structure, which makes it easy to promote its use on various types of bulk carriers.

[0055] In some embodiments of this application, the base plate 210 is provided with a plurality of first connecting portions 211, which are arranged at intervals along the circumference of the base plate 210. For example, the first connecting portions 211 are welded and fixed to the base plate 210.

[0056] The housing 220 is provided with a plurality of second connecting parts 221, which are arranged at intervals along the circumference of the housing 220. For example, the second connecting parts 221 are welded and fixed to the base plate 210.

[0057] The plurality of first connecting parts 211 are correspondingly provided with the plurality of second connecting parts 221, and the first connecting parts 211 and the second connecting parts 221 that are vertically connected are connected by a connector 230.

[0058] Multiple first connecting parts 211 and second connecting parts 221 are arranged circumferentially at intervals, which can evenly distribute the connection force between the container 220 and the bottom plate 210 to the entire edge area. For example, when the cargo hold 100 is under storm ballast conditions, and the container 220 is subjected to water flow impact or vibration after being closed, this distributed connection structure can avoid loosening or deformation of the connection due to excessive local stress, ensuring that the container 220 and the bottom plate 210 always maintain a stable closed state, providing basic support for the sealing performance of the inner cavity. At the same time, the first connecting parts 211 and the bottom plate 210, and the second connecting parts 221 and the container 220 are fixed by welding, which further enhances the overall strength of the connection structure and can adapt to the complex mechanical environment during ship navigation.

[0059] The corresponding first connecting part 211 and second connecting part 221 are quickly connected and separated by connecting parts 230 (such as bolts, clips, etc.). When the cargo hold 100 needs to be switched to storm ballast conditions, the operator can tighten the connecting parts 230 in sequence along the circumference to make the container 220 quickly close with the bottom plate 210; and after ballasting is completed, the container 220 can be opened simply by loosening the connecting parts 230. The whole process does not require disassembly of the audible and visual alarm 300, which greatly simplifies the operation process.

[0060] Furthermore, this structure further enhances the sealing performance. When the enclosure 220 is closed, the circumferentially distributed connection points ensure that the first sealing part 260 (the seal between the base plate 210 and the enclosure 220) receives uniform compressive force, preventing deformation or gaps caused by uneven local stress, thus ensuring consistent sealing performance. This, in conjunction with the second sealing part (the sealing structure inside the cable stuffing box 240), further improves the overall waterproof performance of the protective enclosure 200, effectively preventing external moisture from entering the inner cavity and damaging the audible and visual alarm 300.

[0061] In some embodiments of this application, the connector 230 includes a bolt 231 and a nut 232 (e.g., a wing nut). The bolt 231 is rotatably connected to the first connecting part 211 via a rotating shaft, and the second connecting part 221 is provided with a through hole 222 through which the bolt 231 passes.

[0062] The rotating connection structure between bolt 231 and the first connecting part 211 greatly simplifies the alignment operation when the container 220 is closed. When it is necessary to fix the container 220 to the bottom plate 210, the operator can directly rotate bolt 231 to align it with the through hole 222 of the second connecting part 221 and insert it, without having to hold bolt 231 separately for positioning. This significantly reduces the difficulty of operation, especially in environments with limited space or insufficient light in the cargo hold 100. When using wing nuts 232, tightening or loosening can be done manually without the need for wrenches or other tools, further improving the efficiency of switching operating conditions (such as closing the container 220 before storm ballast and opening the container 220 after ballast), and reducing operating steps and time costs.

[0063] The engagement of bolt 231 and nut 232 provides a stable locking force, ensuring that the housing 220 and base plate 210 do not loosen under external forces such as ship vibration and water flow impact. Compared to easily worn connection methods such as snap-fit ​​connections, the mechanical connection of bolt 231 and nut 232 has higher fatigue resistance and can maintain connection strength for a long time. At the same time, the precise alignment of bolt 231 after passing through hole 222 ensures the force balance between the first connection part 211 and the second connection part 221, avoiding local stress concentration caused by connection deviation, thereby protecting the overall structural stability of the protective housing 200.

[0064] In some embodiments of this application, the through hole 222 is an open hole, and after the nut 232 is disengaged from the bolt 231, the bolt 231 rotates around the pivot axis to the outside of the housing 220, and the bolt 231 disengages from the through hole 222.

[0065] The open perforation 222 and the rotatable structure of the bolt 231 work synergistically. When the housing 220 needs to be opened, after loosening the nut 232, the operator does not need to completely pull the bolt 231 out of the perforation 222. Simply rotating the bolt 231 around its axis to the outside of the housing 220 allows the open perforation 222 to quickly disengage the bolt 231 from its connection position. This process eliminates the cumbersome steps of inserting and removing the bolt 231 in the traditional closed perforation 222. Especially in confined spaces like the cargo hold 100 where operation is restricted, this significantly reduces the time required to open the housing 220 and lowers the operator's workload. Simultaneously, the bolt 231 naturally retracts outwards after rotation, avoiding obstruction to the opening and closing of the housing 220, making the opening and closing of the housing 220 smoother.

[0066] This design effectively avoids the risk of bolt 231 being lost. In traditional connectors 230, bolt 231 is easily lost due to operational negligence after being completely separated from the connecting part. However, in this application, bolt 231 is kept connected to the first connecting part 211 via a pivot, and will not separate from the main body of the protective box 200 even if it detaches from the through hole 222. This not only reduces equipment failures caused by lost parts, but also reduces safety hazards caused by bolt 231 falling into the cargo hold 100 (such as cargo gaps or equipment blind spots), making it particularly suitable for scenarios where equipment integrity requirements are extremely high during ship navigation.

[0067] In some embodiments of this application, the housing 220 is provided with a handle 250 for easy hand operation by the user.

[0068] In some embodiments of this application, a fixing plate 212 is provided on the base plate 210, and the fixing plate 212 is welded to the base plate 210. The fixing plate 212 is fixed to the mounting frame 110 of the cargo compartment 100 by bolts 231 and other connecting parts 230.

[0069] The welded connection between the fixing plate 212 and the base plate 210 provides a solid foundation support for the protective box 200. The fixing plate 212 is connected to the mounting frame 110 via bolts 231 and other connectors 230. When the protective box 200 or the audible and visual alarm 300 needs to be inspected or replaced, the operator can quickly remove the entire protective box 200 (including the base plate 210 and internal equipment) from the mounting frame 110 by removing the bolts 231, without requiring any destructive operations on the cargo hold 100 structure or the main body of the protective box 200. After the inspection is completed, the fixing plate 212 is re-fixed to the mounting frame 110 using the bolts 231, and the box can be put back into use. This significantly reduces the difficulty and time cost of maintenance operations, and is especially suitable for scenarios where space is limited inside the cargo hold 100 and equipment maintenance is inconvenient.

[0070] Furthermore, this design enhances the compatibility of the protective box 200 with different cargo hold mounting brackets 110. Since the dimensions, spacing, and other parameters of the cargo hold mounting brackets 110 may differ between different types of bulk carriers, the fixing plate 212 can be customized according to the specific specifications of the mounting bracket 110 (such as adjusting the opening position and size), achieving a precise match with the mounting bracket 110 via bolts 231, without requiring modifications to the bottom plate 210 structure. This modular design improves the versatility of the protective box 200, enabling it to adapt to the installation needs of various vessels and facilitating mass production and widespread application.

[0071] In some embodiments of this application, the first sealing part 260 is a sealing strip.

[0072] The sealing strip effectively fills the gap between the bottom plate 210 and the container 220. When the cargo hold 100 is under storm ballast conditions, and the container 220 and bottom plate 210 are closed, the sealing strip will elastically deform under the compression of both, tightly fitting the contact surfaces of the bottom plate 210 and the container 220, forming a continuous sealing barrier. This barrier prevents water, moisture, dust, and other impurities inside the cargo hold 100 from entering the inner cavity of the protective container 200 through the gaps, thereby preventing key components such as the control component 310, flashing light 320, and horn 330 of the audible and visual alarm 300 from being submerged in water or contaminated, ensuring their normal operation during pre-release warnings.

[0073] In some embodiments of this application, the second sealing part is a sealing ring. The sealing ring effectively solves the problem of sealing the gap between the cable and the stuffing box 240. The cable needs to pass through the stuffing box 240 to connect to the audible and visual alarm 300, and there will inevitably be a gap between the outer diameter of the cable and the inner wall of the stuffing box 240. This gap becomes a potential channel for external water, moisture, and dust to enter the inner cavity of the protective box 200. The sealing ring is usually made of a material with good elasticity and sealing properties (such as nitrile rubber, silicone, etc.). Under the compression of the stuffing box 240, it will tightly fit the outer wall of the cable and the inner wall of the stuffing box 240, forming a ring-shaped sealing structure, completely blocking the gap channel. This targeted sealing ensures that even under storm ballast conditions where the cargo hold 100 is filled with water, moisture cannot enter the inner cavity through the cable passage, thereby protecting the electrical components of the audible and visual alarm 300 from water immersion damage and ensuring the stability and safety of its circuit connection.

[0074] The elastic properties of the sealing ring allow it to adapt to the sealing requirements of cables of different specifications. Since the cable type of the audible and visual alarm 300 may vary due to differences in ship design or functional requirements, the cable outer diameter may differ. The sealing ring, within a certain range, can elastically deform to conform to the outer wall of cables of different diameters, while maintaining tight contact with the inner wall of the stuffing box 240. This adaptability avoids the problem of frequent replacement of sealing components due to changes in cable specifications, improving the versatility of the protective box 200.

[0075] The sealing ring and sealing strip form a dual sealing system for the protective enclosure 200. The sealing strip is responsible for the circumferential seal between the base plate 210 and the enclosure 220, while the sealing ring focuses on sealing the specific location where cables pass through. The two complement each other, providing comprehensive coverage and jointly constructing a complete waterproof barrier. This dual sealing design significantly improves the overall sealing reliability of the protective enclosure 200. Even if a minor defect occurs in one sealing area due to an accident, the other sealing area can still effectively prevent moisture intrusion, providing redundant protection for the audible and visual alarm 300 and further reducing the risk of equipment damage.

[0076] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0077] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A protective box for an audible and visual alarm, used in a ship's cargo hold, characterized in that, Including: A floor plate is mounted on the mounting frame of the cargo hold, an audible and visual alarm is mounted on the floor plate, and a cable packing gland is provided on the floor plate. The enclosure is detachably mounted on the base plate, and an inner cavity for accommodating the audible and visual alarm is formed between the enclosure and the base plate. A first sealing part is disposed between the bottom plate and the housing, and the first sealing part is configured to prevent external water from entering the inner cavity; A second sealing part is disposed inside the cable stuffing box and is configured to prevent external water from entering the inner cavity; Under normal operating conditions, the cargo hold has the container in an open state, the container is separated from the bottom plate, and the audible and visual alarm is exposed. During storm ballast conditions, the cargo hold is in a closed state, with the cargo hold and the bottom plate closed, and the audible and visual alarm is located in the inner cavity.

2. The protective box for the audible and visual alarm device according to claim 1, characterized in that, The base plate is provided with a plurality of first connecting parts, which are arranged at intervals along the circumference of the base plate; The box body is provided with a plurality of second connecting parts, which are arranged at intervals along the circumference of the box body; The plurality of first connecting parts and the plurality of second connecting parts are respectively arranged, and the first connecting parts and the second connecting parts that are vertically corresponding are connected by a connector.

3. The protective box for the audible and visual alarm device according to claim 2, characterized in that, The connector includes a bolt and a nut. The bolt is rotatably connected to the first connecting part via a rotating shaft. The second connecting part is provided with a through hole for the bolt to pass through.

4. The protective box for the audible and visual alarm device according to claim 3, characterized in that, The perforation is an open hole. After the nut is released from the bolt, the bolt rotates around the pivot axis to the outside of the housing, and the bolt is released from the perforation.

5. The protective box for the audible and visual alarm device according to any one of claims 1 to 4, characterized in that, The box is equipped with a handle.

6. The protective box for the audible and visual alarm device according to any one of claims 1 to 4, characterized in that, A fixing plate is provided on the base plate, and the fixing plate is fixed to the mounting frame of the cargo compartment by a connector.

7. The protective box for the audible and visual alarm device according to any one of claims 1 to 4, characterized in that, The first sealing part is a sealing strip.

8. The protective box for the audible and visual alarm device according to any one of claims 1 to 4, characterized in that, The second sealing part is a sealing ring.

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