Fire-fighting device for ship equipment

Abstract

The present invention provides a fire-fighting device for ship equipment. The fire-fighting device stores flame-retardant gas, and the flame-retardant gas is sealed in the fire-fighting device by a seal. The fire-fighting device is arranged relative to the equipment or around the equipment. When the equipment catches fire, the seal melts and the flame-retardant gas is sprayed onto the equipment to extinguish the fire. The fire-fighting device provided by the present invention can be applied to a single device or an area with a low density of equipment, filling a gap in the prior art. In addition, the fire-fighting device of the present invention does not require the arrangement of connecting pipelines from the ship's main fire-fighting system, which reduces the cost of pipeline arrangement, shortens the construction period, and improves the efficiency of ship construction. The seal automatically melts at high temperatures, ensuring the timeliness of fire extinguishing, and does not require human operation, ensuring the safety of personnel. In addition, the sound-generating device in the fire-fighting device can promptly notify the crew of a fire, which improves the safety and timeliness of fire extinguishing in areas that are not suitable for arranging induction probes.

Description

Technical Field

[0001] The present invention relates to the technical field of shipbuilding, and in particular to a fire-fighting device for ship equipment. Background Art

[0002] During the voyage of a ship, the equipment on the ship may catch fire due to hot surfaces, sparks, spontaneous combustion, short circuits of electrical components, etc. Therefore, it is necessary to install fire-fighting equipment on the ship to ensure the fire safety of the ship. However, the ship fire-fighting equipment in the existing technology has the following problems: 1. The layout of the automatic fire-fighting system is mostly based on the fire protection of the premises, which is suitable for areas with a large number of equipment densely arranged, such as the engine room, and lacks fire protection devices for individual equipment; 2. The fire-fighting equipment mostly adopts a carbon dioxide whole-ship system or a foam fire-fighting whole-ship system, which requires the layout of connecting pipes from the storage tank to the protected premises. The pipeline cost is high, the construction is complicated, and it is difficult to repair during navigation. The gas or foam in the connecting pipe cannot be effectively used for fire prevention, which increases the demand for filling the fire-fighting medium and causes great waste. At the same time, the connecting pipe slows down the system response speed; 3. In the portable fire-fighting scheme arranged on site, after the induction probe detects the fire, the crew needs to rush to the fire area to manually extinguish the fire, which is time-consuming and dangerous. Summary of the Invention

[0003] In view of the shortcomings of the prior art described above, the present invention provides a fire-fighting device for ship equipment, wherein a flame-retardant gas is stored in the fire-fighting device, and the flame-retardant gas is sealed in the fire-fighting device by a seal. The fire-fighting device is arranged relative to the equipment, or arranged around the equipment. When the equipment catches fire, the seal melts, and the flame-retardant gas is sprayed onto the equipment to extinguish the fire. The fire-fighting device provided by the present invention can be applied to a single device or an area with a low density of equipment, filling the gap in the prior art; and the fire-fighting device of the present invention does not require the arrangement of connecting pipelines from the main fire-fighting system of the ship, which reduces the cost of pipeline arrangement, shortens the construction period, and improves the efficiency of ship construction; the seal automatically melts at high temperatures, ensuring the timeliness of fire extinguishing, and does not require human operation, ensuring the safety of personnel; in addition, the sound-emitting device in the fire-fighting device can promptly notify the crew of a fire, which improves the safety of firefighting and the timeliness of fire extinguishing in areas that are not suitable for arranging induction probes.

[0004] To achieve the above-mentioned and other related purposes, the present invention provides a fire-fighting device for marine equipment, comprising:

[0005] A pipeline is arranged opposite to the equipment, and the pipeline is filled with a flame-retardant gas;

[0006] A plurality of air injection holes are arranged at intervals on a side of the pipeline facing the device;

[0007] A seal is installed on the air injection hole to seal the pipeline. One end of the seal is flush with the outer wall of the pipeline, and the other end is formed on the inner wall of the pipeline to cover the air injection hole. The melting point of the seal is lower than 232°C.

[0008] Optionally, the sealing member includes:

[0009] A pressure-bearing member, comprising a first pressure-bearing member and a second pressure-bearing member spaced apart from each other on a horizontal plane, wherein a surface of the pressure-bearing member covers an inner wall of the pipeline, a bottom surface of the pressure-bearing member is located in the air-jet hole, and a gasket is provided on a contact surface between the pressure-bearing member and the pipeline;

[0010] a welding member, filled between the first pressure-bearing member and the second pressure-bearing member to connect the first pressure-bearing member and the second pressure-bearing member, wherein the surface of the welding member is flush with the surface of the pressure-bearing member, the bottom surface of the welding member is flush with the bottom surface of the pressure-bearing member, and the width of the surface of the welding member is greater than the width of the bottom surface of the welding member;

[0011] A blocking layer is filled in the air injection hole, one end of the blocking layer is flush with the outer wall of the pipeline, and the other end is connected to the bottom surface of the pressure-bearing part and the bottom surface of the welding part. The blocking layer is connected to the pipeline through an adhesive.

[0012] Optionally, the pipeline is made of one of stainless steel, carbon steel, and brass.

[0013] Optionally, the pressure-bearing member and the pipeline are made of the same material.

[0014] Optionally, a sound-generating device is further included, which is installed on the outer wall of the pipeline and is coaxially arranged with the sealing member, and is used to make a sound after the sealing member is melted.

[0015] The present invention also provides a fire-fighting device for marine equipment, comprising:

[0016] A protective cover is provided around the device, the device is enclosed in the protective cover, the protective cover includes a first layer and a second layer, the second layer is provided around the first layer and forms a cavity with the first layer, the cavity is filled with flame-retardant gas;

[0017] a plurality of air jet holes arranged at intervals on the first layer;

[0018] A seal is installed on the air injection hole to seal the cavity, one end of the seal is flush with the inner surface of the first layer, and the other end is formed on the outer surface of the first layer to cover the air injection hole, and the melting point of the seal is lower than 232°C.

[0019] Optionally, the sealing member includes:

[0020] A pressure-bearing member, comprising a first pressure-bearing member and a second pressure-bearing member spaced apart from each other on a horizontal plane, wherein a surface of the pressure-bearing member covers an outer surface of the first layer, a bottom surface of the pressure-bearing member is located in the air-jet hole, and a gasket is provided on a contact surface between the pressure-bearing member and the first layer;

[0021] a welding member, filled between the first pressure-bearing member and the second pressure-bearing member to connect the first pressure-bearing member and the second pressure-bearing member, wherein the surface of the welding member is flush with the surface of the pressure-bearing member, the bottom surface of the welding member is flush with the bottom surface of the pressure-bearing member, and the width of the surface of the welding member is greater than the width of the bottom surface of the welding member;

[0022] A sealing layer is filled in the air injection hole, one end of the sealing layer is flush with the inner surface of the first layer, and the other end is connected to the bottom surface of the pressure-bearing part and the bottom surface of the welding part. The sealing layer is connected to the first layer by an adhesive.

[0023] Optionally, the protective cover is made of one of stainless steel, carbon steel, and brass.

[0024] Optionally, the pressure-bearing member and the protective cover are made of the same material.

[0025] Optionally, a sound-generating device is further included, which is installed on the inner surface of the first layer and is coaxially arranged with the sealing member, and is used to generate a sound after the sealing member is melted.

[0026] Optionally, the welding part is made of an alloy material formed by multiple metal materials including bismuth, tin, lead, and indium.

[0027] Optionally, the sealing layer is made of a material selected from the group consisting of paraffin, polyethylene, polyvinyl chloride, and polystyrene.

[0028] Optionally, the sealing member is made of an alloy material formed by multiple metal materials including bismuth, tin, lead, and indium.

[0029] Optionally, the flame retardant gas is one of carbon dioxide, nitrogen, helium, neon, argon, krypton and xenon.

[0030] The fire-fighting device for marine equipment provided by the present invention has at least the following beneficial effects:

[0031] The fire-fighting device provided by the present invention can be applied to single equipment or areas with low equipment density, filling the gap in the prior art. Moreover, the fire-fighting device of the present invention does not require the layout of connecting pipelines from the main fire-fighting system of the ship, which reduces the cost of pipeline layout, shortens the construction period, and improves the efficiency of ship construction. The seal automatically melts at high temperatures, ensuring the timeliness of fire extinguishing, and does not require human operation, thus ensuring the safety of personnel. In addition, the sound-emitting device in the fire-fighting device can promptly notify the crew of a fire, which improves the safety and timeliness of fire extinguishing in areas that are not suitable for the layout of induction probes. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 Shown is a schematic diagram of the installation positions of pipelines and equipment in Example 1.

[0033] Figure 2 The figure shows the arrangement of the air injection holes on the pipeline in the first embodiment.

[0034] Figure 3 It shows a structural diagram of the sealing component installed on the pipeline in the first embodiment.

[0035] Figure 4 It shows a structural diagram of the sealing component installed on the pipeline in the second embodiment.

[0036] Figure 5 Shown is a schematic diagram of the installation positions of pipelines and equipment in Example 3.

[0037] Figure 6 It shows a schematic diagram of the structure of the sealing element installed on the pipeline in the third embodiment.

[0038] Figure 7 It shows a schematic structural diagram of the sealing member installed on the pipeline in the fourth embodiment.

[0039] Component number description

[0040] 10 Pipeline

[0041] 20 seals

[0042] 211 First pressure bearing member

[0043] 212 first pressure-bearing member

[0044] 22 welded parts

[0045] 23 Sealing layer

[0046] 30 devices

[0047] 40 Sound-generating devices

[0048] 50 protective cover

[0049] 51 The first layer of protective cover

[0050] 52 Second layer of protective cover

[0051] 100 fumaroles

[0052] 500 cavity DETAILED DESCRIPTION

[0053] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention.

[0054] It should be noted that the illustrations provided in this embodiment only illustrate the basic concept of the present invention in a schematic manner. Although the illustrations only show components related to the present invention and are not drawn according to the number, shape and size of components in actual implementation, the form, quantity, positional relationship and proportion of each component in actual implementation can be changed at will under the premise of realizing the technical solution of this party, and the component layout form may also be more complicated.

[0055] Example 1

[0056] This embodiment provides a fire-fighting device for marine equipment, including a pipeline 10 , a plurality of air-jet holes 100 are provided on the pipeline 10 , and a sealing member 20 is installed on the air-jet holes 100 .

[0057] like Figure 1 As shown, pipeline 10 is arranged opposite to device 30 and is filled with a flame-retardant gas. As an example, pipeline 10 is made of a high-temperature and high-pressure resistant material, such as stainless steel, carbon steel, or brass, to facilitate storage of high-pressure flame-retardant gas while preventing softening and deformation due to high temperatures. As an example, the height of pipeline 10 is less than or equal to 2 meters; the air pressure within pipeline 10 is less than or equal to 3 bars. As an example, the flame-retardant gas is selected from one of carbon dioxide, nitrogen, helium, neon, argon, krypton, and xenon.

[0058] It should be noted that this embodiment uses the arrangement of pipeline 10 relative to equipment 30 as an example. In other optional embodiments, pipeline 10 can be arranged around or within equipment 30 requiring fire protection. Furthermore, one or more pipelines 10 can be arranged around equipment 30. These multiple pipelines 10 can be independent of each other or connected in parallel to a fire-fighting gas storage tank, and the pipelines 10 can be independent of the ship's main fire-fighting pipeline.

[0059] like Figure 2As shown, the pipeline 10 is provided with a plurality of gas injection holes 100 arranged at intervals on the side of the pipeline 10 facing the equipment 30. When a fire occurs in the equipment 30, flame-retardant gas can be ejected from the gas injection holes 100, thereby extinguishing the fire in the equipment 30. As an example, the arrangement of the plurality of gas injection holes 100 on the pipeline 10 is determined based on the distribution of flammable risk areas of the protected equipment 30, with the gas injection positions of the gas injection holes 100 aimed at areas with a greater fire risk.

[0060] like Figure 3 As shown, the seal 20 is installed on the air injection hole 100 to seal the pipeline 10. In this embodiment, the seal 20 is a T-shaped structure, one end of which is flush with the outer wall of the pipeline 10 and the other end is formed on the inner wall of the pipeline 10 to cover the air injection hole 100.

[0061] As an example, the seal 20 is made of an alloy material with a melting point lower than 232°C, such as an alloy material formed by multiple metal materials including bismuth, tin, lead, and indium. When the ambient temperature is higher than or equal to 232°C, the seal 20 melts, and the flame-retardant gas in the pipeline 10 is ejected from the jet hole 100 to extinguish the fire in the equipment 30.

[0062] As an example, the seal 20 is connected to the pipe 10 via an adhesive (not shown). The thickness of the adhesive is 1.0 mm to 1.5 mm, preferably 1.5 mm. The adhesive should not be too thick, otherwise it will increase the gap between the seal 20 and the pipe 10, affecting the sealing performance. The adhesive should not be too thin, otherwise it will increase the manufacturing precision requirements of the seal 20 and the air injection hole 100, increasing costs and scrap rates.

[0063] like Figure 3 As shown, a sounding device 40 is mounted on the outer wall of the pipeline 10, coaxially arranged with the seal 20. This device is designed to emit a sound when the seal 20 melts, alerting the crew of an equipment fire. In this embodiment, the sounding device 40 is a whistle structure. When the seal 20 melts, air is ejected from the pipeline 10 and passes through the whistle structure, where it resonates at the same frequency, producing a sharp whistle. As an example, the sounding device 40 is arranged on one or more air jets 100, with the number of devices determined based on the sound generation requirements.

[0064] Example 2

[0065] This embodiment also provides a fire-fighting device for marine equipment, including a pipe 10, a plurality of air-jet holes 100 provided on the pipe 10, and a sealing member 20 installed on the air-jet holes 100. The fire-fighting device provided in this embodiment is similar to that in the first embodiment, and will not be described in detail here. Figure 4As shown, the sealing member 20 includes a pressure-bearing member, a welding member 22 and a blocking layer 23, wherein the welding member 22 is made of an alloy material with a melting point lower than 232°C.

[0066] As an example, the pressure-bearing member includes a first pressure-bearing member 211 and a second pressure-bearing member 212 spaced apart from each other on a horizontal plane. The surface of the pressure-bearing member is formed on the inner wall of the pipeline 10, and the bottom surface of the pressure-bearing member is located in the air injection hole 100. A gasket (not shown) is also provided on the contact surface between the pressure-bearing member and the pipeline 10. The pressure-bearing member and the pipeline 10 are made of the same material, such as stainless steel, carbon steel, or brass, which is resistant to high temperatures and high pressures.

[0067] As an example, the weld 22 is filled between the first pressure-bearing member 211 and the second pressure-bearing member 212 to connect the first pressure-bearing member 211 and the second pressure-bearing member 212. The surface of the weld 22 is flush with the surface of the pressure-bearing member, and the bottom of the weld 22 is flush with the bottom of the pressure-bearing member. As an example, the weld 22 is made of an alloy material with a melting point lower than 232°C, such as an alloy material formed from multiple metal materials such as bismuth, tin, lead, and indium. The width d1 of the surface of the weld 22 is greater than the width d2 of its bottom, so that when the ambient temperature is higher than or equal to 232°C, after the weld 22 melts, the pressure-bearing member is affected by the gas pressure in the pipe and falls outward, allowing the flame-retardant gas in the pipeline 10 to be ejected from the gas injection hole 100.

[0068] As an example, the sealing layer 23 is filled in the air injection hole 100, with one end flush with the outer wall of the pipeline 10 and the other end connected to the bottom surface of the pressure-bearing member and the bottom surface of the weldment 22. The sealing layer 23 is made of a non-metallic material, such as paraffin wax, polyethylene, polyvinyl chloride, or polystyrene. As an example, the sealing layer 23 is connected to the pipeline 10 via an adhesive (not shown). The thickness of the adhesive is 1.0 mm to 1.5 mm, preferably 1.5 mm.

[0069] In the fire-fighting device for marine equipment provided in this embodiment, the seal 20 includes a first pressure-bearing member 211, a second pressure-bearing member 212, a weld 22, and a sealing layer 23. At room temperature, the first pressure-bearing member 211, the second pressure-bearing member 212, the weld 22, and the sealing layer 23 are interconnected to form a seal, ensuring the tightness of the pipeline 10. When the ambient temperature is greater than or equal to 232°C, the sealing layer 23 and the weld 22 melt, causing the first and second pressure-bearing members 211, 212 to fall off due to unbalanced force, allowing the flame-retardant gas in the pipeline 10 to be ejected from the jet holes 100, thereby extinguishing the fire. In this embodiment, only the weld 22 of the seal 20 is made of a fusible material. Compared with the first embodiment, this reduces the amount of fusible material used and saves manufacturing costs. In addition, the provision of a gasket and adhesive ensures that the pressure-bearing member can quickly fall off while ensuring tightness, allowing the fire-extinguishing gas to be ejected from the jet holes.

[0070] Example 3

[0071] This embodiment provides a fire-fighting device for marine equipment, including a protective cover 50 . The protective cover 50 is provided with a plurality of air-jet holes 100 , and a sealing member 20 is installed on the air-jet holes 100 .

[0072] like Figure 5 As shown, a protective cover 50 is disposed around the device 30, and the device 30 is enclosed in the protective cover 50. The protective cover 50 includes a first layer 51 and a second layer 52. The second layer 52 is disposed around the first layer 51 and forms a cavity 500 with the first layer 51. The cavity 500 is filled with a flame-retardant gas. As an example, the flame-retardant gas is selected from one of carbon dioxide, nitrogen, helium, neon, argon, krypton, and xenon.

[0073] As an example, protective cover 50 is made of a high-temperature and high-pressure resistant material, such as stainless steel, carbon steel, or brass, to facilitate storage of high-pressure, flame-retardant gas within cavity 500 without softening or deforming due to high temperatures. As an example, because protective cover 50 is a plate-like structure with weak pressure-bearing capacity, the gas pressure within cavity 500 is less than or equal to 1 bar to reduce material weight and lower costs.

[0074] As an example, the first layer 51 of the protective cover has multiple air jet holes 100 spaced apart. When a fire breaks out in the equipment 30, the flame-retardant gas in the cavity 500 can be ejected from the air jet holes 100, thereby extinguishing the fire in the equipment 30. The placement of the multiple air jet holes 100 on the first layer 51 is determined based on the distribution of flammable risk areas of the protected equipment 30, with the air jet holes 100 aiming at areas with a higher fire risk.

[0075] like Figure 6 As shown, the seal 20 is installed on the air injection hole 100 to seal the cavity 500. In this embodiment, the seal 20 is a T-shaped structure, one end of which is flush with the inner surface of the first layer 51 and the other end is formed on the outer surface of the first layer 51 to cover the air injection hole 100.

[0076] As an example, the seal 20 is made of an alloy material with a melting point lower than 232°C, such as an alloy material formed by multiple metal materials including bismuth, tin, lead, and indium. When the ambient temperature is higher than or equal to 232°C, the seal 20 melts, and the flame-retardant gas in the cavity 500 is ejected from the jet hole 100 to extinguish the fire of the equipment 30.

[0077] As an example, the sealing member 20 is connected to the first layer 51 of the protective cover by an adhesive (not shown in the figures), and the thickness of the adhesive is 1.0 mm to 1.5 mm, preferably 1.5 mm.

[0078] like Figure 6 As shown, a sound-generating device 40 is mounted on the inner surface of the first layer 51. Coaxially arranged with the seal 20, the sound-generating device 40 emits a sound when the seal 20 melts, alerting the crew of an equipment fire. In this embodiment, the sound-generating device 40 is a whistle structure. When the seal 20 melts, air is ejected from the cavity 500 and passes through the whistle structure, resonating at the same frequency and producing a sharp whistle. For example, the sound-generating device 40 is arranged on one or more air jet holes 100, with the number of devices determined based on the sound generation requirements.

[0079] Example 4

[0080] This embodiment also provides a fire-fighting device for marine equipment, including a protective cover 50, a plurality of air-jet holes 100 are provided on the protective cover 50, and a sealing member 20 is installed on the air-jet holes 100. The fire-fighting device provided in this embodiment is similar to that in the third embodiment, and will not be described in detail here. Figure 7 As shown, the sealing member 20 includes a pressure-bearing member, a welding member 22 and a blocking layer 23, wherein the welding member 22 is made of an alloy material with a melting point lower than 232°C.

[0081] As an example, the pressure-bearing member includes a first pressure-bearing member 211 and a second pressure-bearing member 212 spaced apart from each other on a horizontal plane. The surface of the pressure-bearing member is formed on the outer surface of the first layer 51 of the protective cover, and the bottom surface of the pressure-bearing member is located in the air injection hole 100. A gasket (not shown) is also provided on the contact surface between the pressure-bearing member and the first layer 51. The pressure-bearing member and the protective cover 50 are made of the same material, such as stainless steel, carbon steel, or brass, which is resistant to high temperatures and high pressures.

[0082] As an example, the weld 22 is filled between the first pressure-bearing member 211 and the second pressure-bearing member 212 to connect the first pressure-bearing member 211 and the second pressure-bearing member 212. The surface of the weld 22 is flush with the surface of the pressure-bearing member, and the bottom surface of the weld 22 is flush with the bottom surface of the pressure-bearing member. As an example, the weld 22 is made of an alloy material with a melting point lower than 232°C, such as an alloy material formed from multiple metal materials such as bismuth, tin, lead, and indium. The width d1 of the surface of the weld 22 is greater than the width d2 of its bottom surface. When the ambient temperature is higher than or equal to 232°C, after the weld 22 melts, the pressure-bearing member is affected by the gas pressure in the tube and falls off outward, causing the flame-retardant gas in the cavity 500 to be ejected from the gas injection hole 100.

[0083] As an example, the sealing layer 23 is filled in the air jet hole 100, with one end flush with the inner surface of the first layer 51 and the other end connected to the bottom surfaces of the first pressure-bearing member 211, the second pressure-bearing member 212, and the bottom surface of the weldment 22. The sealing layer 23 is made of a non-metallic material, such as paraffin wax, polyethylene, polyvinyl chloride, or polystyrene. As an example, the sealing layer 23 is connected to the first layer 51 of the protective cover via an adhesive (not shown). The thickness of the adhesive is 1.0 mm to 1.5 mm, preferably 1.5 mm.

[0084] In the fire-fighting device for marine equipment provided in this embodiment, the seal 20 includes a first pressure-bearing member 211, a second pressure-bearing member 212, a weld 22, and a sealing layer 23. At room temperature, the first pressure-bearing member 211, the second pressure-bearing member 212, the weld 22, and the sealing layer 23 are interconnected to form a seal, ensuring the tightness of the cavity 500. When the ambient temperature is greater than or equal to 232°C, the sealing layer 23 and the weld 22 melt, causing the first and second pressure-bearing members 211, 212 to fall off due to unbalanced force, allowing the flame-retardant gas within the cavity 500 to be ejected from the jet holes 100, extinguishing the fire. In this embodiment, only the weld 22 of the seal 20 is made of a fusible material. Compared with the third embodiment, this reduces the amount of fusible material used and saves manufacturing costs.

[0085] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A fire-fighting device for ship equipment, characterized in that: include: A pipeline is arranged opposite to the equipment, and the pipeline is filled with a flame-retardant gas; A plurality of air injection holes are arranged at intervals on a side of the pipeline facing the device; a seal mounted on the air injection hole to seal the pipeline, one end of the seal being flush with the outer wall of the pipeline, and the other end being formed on the inner wall of the pipeline to cover the air injection hole, and the melting point of the seal being lower than 232° C., the seal comprising a pressure-bearing member and a welding member, the pressure-bearing member comprising a first pressure-bearing member and a second pressure-bearing member spaced apart from each other on a horizontal plane, the surface of the pressure-bearing member covering the inner wall of the pipeline, the bottom surface of the pressure-bearing member being located in the air injection hole, and a gasket being provided on the contact surface between the pressure-bearing member and the pipeline; the welding member being filled between the first pressure-bearing member and the second pressure-bearing member to connect the first pressure-bearing member and the second pressure-bearing member, the surface of the welding member being flush with the surface of the pressure-bearing member, the bottom surface of the welding member being flush with the bottom surface of the pressure-bearing member, and the width of the surface of the welding member being greater than the width of the bottom surface of the welding member; When the ambient temperature is higher than or equal to 232° C., the welding part melts, and the first pressure-bearing part and the second pressure-bearing part fall off due to unbalanced force.

2. The fire-fighting device for ship equipment according to claim 1, characterized in that: The seal also includes: a sealing layer, which is filled in the air injection hole. One end of the sealing layer is flush with the outer wall of the pipeline, and the other end is connected to the bottom surface of the pressure-bearing part and the bottom surface of the welding part. The sealing layer is connected to the pipeline by an adhesive. When the ambient temperature is higher than or equal to 232°C, the welding part and the sealing layer melt, and the first pressure-bearing part and the second pressure-bearing part fall off due to unbalanced force.

3. The fire-fighting device for ship equipment according to claim 2, characterized in that: The pipeline is made of one of stainless steel, carbon steel and brass.

4. The fire-fighting device for ship equipment according to claim 3, characterized in that: The pressure-bearing part and the pipeline are made of the same material.

5. The fire-fighting device for ship equipment according to claim 1, characterized in that: It also includes a sound-generating device, which is installed on the outer wall of the pipeline and is coaxially arranged with the sealing member, and is used for making a sound after the sealing member is melted.

6. The fire-fighting device for ship equipment according to claim 1, characterized in that: The welding piece is made of an alloy material formed by multiple metal materials including bismuth, tin, lead and indium.

7. The fire-fighting device for marine equipment according to claim 2, characterized in that: The sealing layer is made of a material selected from the group consisting of paraffin wax, polyethylene, polyvinyl chloride, and polystyrene.

8. The fire-fighting device for marine equipment according to claim 1, characterized in that: The flame retardant gas is selected from one of carbon dioxide, nitrogen, helium, neon, argon, krypton and xenon.

9. A fire-fighting device for marine equipment, characterized in that: include: A protective cover is provided around the device, the device is enclosed in the protective cover, the protective cover comprises a first layer and a second layer, the second layer is provided around the first layer and forms a cavity with the first layer, the cavity is filled with flame-retardant gas; a plurality of air jet holes arranged at intervals on the first layer; a sealing member installed on the air injection hole to seal the cavity, one end of the sealing member being flush with the inner surface of the first layer, and the other end being formed on the outer surface of the first layer covering the air injection hole, and the melting point of the sealing member being lower than 232° C., the sealing member comprising a pressure-bearing member and a welding member, the pressure-bearing member comprising a first pressure-bearing member and a second pressure-bearing member spaced apart from each other on a horizontal plane, the surface of the pressure-bearing member covering the outer surface of the first layer, the bottom surface of the pressure-bearing member being located in the air injection hole, and a gasket being provided on the contact surface between the pressure-bearing member and the first layer; the welding member being filled between the first pressure-bearing member and the second pressure-bearing member to connect the first pressure-bearing member and the second pressure-bearing member, the surface of the welding member being flush with the surface of the pressure-bearing member, the bottom surface of the welding member being flush with the bottom surface of the pressure-bearing member, and the width of the surface of the welding member being greater than the width of the bottom surface of the welding member; When the ambient temperature is higher than or equal to 232° C., the welding part melts, and the first pressure-bearing part and the second pressure-bearing part fall off due to unbalanced force.

10. The fire-fighting device for ship equipment according to claim 9, characterized in that: The sealing member comprises: A blocking layer is filled in the air jet hole, one end of the blocking layer is flush with the inner surface of the first layer, and the other end is connected to the bottom surface of the pressure-bearing part and the bottom surface of the welding part. The blocking layer and the first layer are connected by an adhesive. When the ambient temperature is higher than or equal to 232°C, the welding part and the blocking layer melt, and the first pressure-bearing part and the second pressure-bearing part fall off due to unbalanced force.

11. The fire-fighting device for ship equipment according to claim 9, characterized in that: The protective cover is made of one of stainless steel, carbon steel and brass.

12. The fire-fighting device for ship equipment according to claim 11, characterized in that: The pressure-bearing member and the protective cover are made of the same material.

13. The fire-fighting device for ship equipment according to claim 9, characterized in that: It also includes a sound-generating device, which is installed on the inner surface of the first layer and is coaxially arranged with the sealing component, and is used for making a sound after the sealing component is melted.

14. The fire-fighting device for ship equipment according to claim 9, characterized in that: The welding piece is made of an alloy material formed by multiple metal materials including bismuth, tin, lead and indium.

15. The fire-fighting device for ship equipment according to claim 10, characterized in that: The sealing layer is made of a material selected from the group consisting of paraffin wax, polyethylene, polyvinyl chloride, and polystyrene.

16. The fire fighting device for ship equipment according to claim 9, characterized in that: The flame retardant gas is selected from one of carbon dioxide, nitrogen, helium, neon, argon, krypton and xenon.

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