KR-20260066933-A - DRY CHEMICAL POWDER FIRE EXTINGUISHER APPARATUS FOR SHIP

Abstract

The present invention discloses a powder fire extinguishing agent fire suppression system for ships. Specifically, it is characterized by comprising: a sensing unit for detecting a fire; a release cabinet unit that operates when a fire is detected by the sensing unit; a nitrogen cylinder unit that stores nitrogen and releases nitrogen upon operation of the release cabinet unit; a powder tank unit into which nitrogen released from the nitrogen cylinder is injected and, when a certain pressure is reached, an internal powder extinguishing agent is discharged; and a spray nozzle unit in which the extinguishing agent discharged from the powder tank is sprayed into a fire area through a nozzle.

Inventors

• 김순호
• 이혜주

Assignees

• 주식회사 나브텍

Dates

Publication Date

20260512

Application Date

20241105

Claims (7)

1. A sensing unit that detects fire; A release cabinet unit that operates when a fire is detected by the above-mentioned sensing unit; A nitrogen cylinder unit that stores nitrogen and releases nitrogen by the operation of the release cabinet unit; A powder tank section into which nitrogen released from the above nitrogen cylinder is injected, and in which the internal powder fire extinguishing agent is discharged when a certain pressure is reached; and A fire suppression system for a ship using a powder fire extinguishing agent, characterized by including a spray nozzle section through which a fire extinguishing agent discharged from a powder tank is sprayed into a fire area through a nozzle.
2. In Article 1, The above sensing unit is, It includes a gas detection sensor that detects gas generated in the event of a fire, a flame detection sensor that detects flames, and a smoke detection sensor that detects smoke, but, A fire suppression system for a ship using a powder fire extinguishing agent, characterized by determining that a fire has occurred and operating the release cabinet when any two or more of the above-mentioned gas detection sensor, flame detection sensor, and smoke detection sensor are detected.
3. In Article 1, The above powder tank section is, A fire suppression system for a ship using a powder fire extinguishing agent, characterized by comprising: a pressure tank containing a powder fire extinguishing agent; a stirrer provided on one side of the pressure tank to periodically stir the powder fire extinguishing agent inside to prevent solidification; a vibrator provided on one side of the pressure tank to periodically shake the powder fire extinguishing agent inside the pressure tank by applying vibration or impact to the pressure tank; and a negative pressure pump provided on one side of the pressure tank to communicate with the internal space of the pressure tank and to lower the internal pressure of the pressure tank to a vacuum.
4. In Paragraph 3, The above stirrer is, A fire suppression system for a powder fire extinguishing agent of a ship, characterized by comprising: a stirring motor provided on one side of the pressure tank; a first stirring shaft extending from the drive shaft of the stirring motor and disposed inside the pressure tank; a first extension rod bent from the end of the first stirring shaft to stir the powder fire extinguishing agent; a second extension rod bent from the end of the first extension rod to be parallel to the first stirring shaft and to stir the powder fire extinguishing agent; a stirring crank including a third extension rod bent from the end of the second extension rod to be parallel to the first extension rod and to stir the powder fire extinguishing agent; a second stirring shaft bent from the end of the third extension rod and disposed in a straight line with the first stirring shaft or parallel to the first stirring shaft; and a bearing bushing provided on the other side of the pressure tank to rotatably support the end of the second stirring shaft.
5. In Paragraph 3, The above vibrator is, A fire suppression system for a ship using a powder fire extinguishing agent, characterized by comprising: a protective tank containing the pressure tank; a plurality of springs interconnecting the inner surface of the protective tank and the outer surface of the pressure tank; a first bracket protruding from the outer surface of the pressure tank; a second bracket protruding from the inner surface of the protective tank; a rotary motor connected to the rotation shaft to transmit driving force to the rotation shaft; and a linkage means for imparting vibration to the pressure tank through the first bracket and the second bracket by rotation according to the driving force of the rotary motor.
6. In Article 1, The above-mentioned spray nozzle part is, A fire suppression system for a ship using a powder extinguishing agent, characterized by comprising: a nozzle having a tip that sprays a powder extinguishing agent supplied from the powder tank section in a radial manner; and a spray vortex unit provided on one side of the nozzle that sprays the powder extinguishing agent by rotating the nozzle so that the tip forms a cone or frustum-shaped trajectory with respect to the end of a pipe through which the powder extinguishing agent is transported.
7. In Article 6, The above-mentioned branching and kinetic unit is, A fire suppression system for a ship using a powder fire extinguishing agent, characterized by comprising: a socket with two through ends that is coupled to the end of the pipe and forms an internal flow path communicating with the pipe; a spherical joint provided on the tip of the nozzle and seated inside the socket, capable of rotating in all directions; and a stopper ring mounted on the inner circumference of the socket to prevent the joint from detaching from the socket.

Description

Dry Chemical Fire Extinguisher Apparatus for Ship The present invention relates to a fire suppression system for ships, and more specifically, to a powder fire suppression agent fire suppression system for ships that can be applied to a powder fire suppression agent fire suppression system, which is a fire extinguishing facility applied to LNG-propelled ships and bunkering systems. The IGF Code is an acronym for the "International Code of Safety for Ships Using Gases or Other Low-Flashpoint Fuels." It was established by the International Maritime Organization (IMO) and defines international standards regarding the safety of ships using gas or other low-flashpoint fuels. The IGF Code is applicable to vessels using low-flammability fuels, including liquefied natural gas (LNG) and liquefied petroleum gas (LPG), and provides the necessary regulations and guidelines to enable these vessels to operate safely and effectively respond to risks such as fire and explosion. In addition, the IGF Code includes rules to enhance safety in various aspects, such as ship design, construction, operation, life safety, and environmental protection. Furthermore, the IGF Code applies not only to the construction of new ships but also to the retrofitting of existing vessels, and it establishes standards for safety certification and inspection to ensure compliance with international safety standards. In other words, the goal of the IGF Code is to ensure safe navigation globally by ensuring that ships using low-flammability fuels possess the highest level of safety. According to 11.6.1 of the Regulations for dry chemical powder fire-extinguishing system in the IGF Code, it is stipulated that a spray performance of 3.5 kg per second must be maintained for 45 seconds. This dry chemical fire extinguishing system suppresses fires by mixing dry chemical powder with nitrogen in a mixing tank and spraying it through a fire extinguishing nozzle. A more detailed examination of this powder fire extinguishing agent fire suppression system (hereinafter referred to as the fire suppression system) is as follows. First, the fire suppression system may include a release cabinet, a nitrogen cylinder, a dry chemical powder tank, and a dry chemical powder nozzle. Here, the release cabinet is used to operate a valve for spraying fire extinguishing agent, and when the valve is opened, nitrogen from the nitrogen cylinder is injected into the powder fire extinguishing agent tank; when a certain pressure is reached by a pressure regulating device attached to the powder fire extinguishing agent tank, the powder fire extinguishing agent inside the tank is sprayed through the piping and the powder fire extinguishing agent nozzle. However, most fires occurring on existing ships are caused by liquids or solids, such as oil or cargo, and are extinguished using seawater. However, with the recent trend of introducing LNG-powered vessels and shifting propulsion methods toward eco-friendly approaches using gaseous fuels such as hydrogen or ammonia, it is urgent to establish a fire suppression system utilizing dry powder extinguishing agents to suppress fires that may arise from gas. FIG. 1 is a schematic diagram showing the overall configuration of a powder fire extinguishing agent fire suppression system for a ship according to one embodiment of the present invention. FIG. 2 is a cross-sectional view showing the internal structure of the powder tank portion of the present invention illustrated in FIG. 1. FIG. 3 is a cross-sectional view showing the configuration of the stirrer, vibrator, and negative pressure pump of the powder tank section of the present invention illustrated in FIG. 2. FIG. 4 is a plan view illustrating the coupling structure of the vibrator of the present invention shown in FIG. 3. FIG. 5 is a cross-sectional view showing the injection nozzle portion of the present invention illustrated in FIG. 1. FIG. 6 is a perspective view showing the nozzle of the spray nozzle part of the present invention illustrated in FIG. 6. FIG. 7 is a cross-sectional view of the nozzle of the present invention shown in FIG. 7. Fig. 8 is a conceptual enlarged cross-sectional view of part vi of Fig. 7. FIG. 9 is a conceptual enlarged cross-sectional view of part vii of FIG. 8. In the following, embodiments of the present invention are provided for a more accessible understanding of the present invention and do not limit the scope of the present invention. That is, the following embodiments are provided to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Furthermore, the terms used herein are for describing embodiments and are not intended to limit the invention. In this specification, the singular form includes the plural form unless specifically stated otherwise in the text. As used herein, "comprises" and/or "co