CN201899803U - Gas fire extinguishing system for underground substation - Google Patents

Abstract

Underground substation gas fire extinguishing system, including chemical storage and spraying equipment, fire alarm and control equipment, said chemical storage and spraying equipment includes high-pressure gas storage cylinders, steel cylinder fixing brackets, bottle head valve electric and manual starters, pressure Indicators, high-pressure hoses, collecting pipes, one-way valves, safety relief valves, pressure-relief orifice plates, protection zone selection valves, gas delivery pipes, open nozzles, and the fire alarm and control equipment include fire detectors , gas fire extinguishing system control panel, manual switch, emergency stop switch, hand, automatic selection switch, alarm bell, buzzer and flashing light, gas release indicator light, pressure switch, the above-mentioned chemical storage and spraying equipment and fire alarm and control device connections. The system has the functions of automatically/manually spraying gas to extinguish fire, and reporting fire danger and feedback system status.

Description

Underground Substation Gas Fire Extinguishing System

technical field

The utility model relates to a gas fire extinguishing system, in particular to a gas fire extinguishing system.

Background technique

The underground substation is one of the most important functional areas in the building. Due to the large number of equipment, it is also more likely to cause fires. This makes how to prevent fires and effectively control the extent of fires very important. For the layout of large substations There are no mature standards for reference at present, and the construction of substations exceeds the scale standards of the existing design fire prevention codes and regulations. Therefore, the use of a reasonable fire extinguishing system can ensure the fire safety of substations and avoid or reduce fires. It is of great significance to the project construction and long-term safe operation of the substation project.

Utility model content

The purpose of this utility model is to provide a kind of underground substation gas fire-fighting fire extinguishing system in order to overcome the defective that above-mentioned prior art exists.

The purpose of this utility model can be achieved through the following technical solutions:

The gas fire extinguishing system of the underground substation includes chemical storage and spraying equipment, fire alarm and control equipment. The chemical storage and spraying equipment includes high-pressure gas storage cylinders, steel cylinder fixing brackets, electric and manual starters for bottle head valves, Pressure indicators, high-pressure hoses, manifolds, one-way valves, safety relief valves, decompression orifice plates, protection zone selection valves, gas delivery pipes, open nozzles, the fire alarm and control equipment includes fire detection Device, gas fire extinguishing system control panel, manual switch, emergency stop switch, hand, automatic selection switch, alarm bell, buzzer and flashing light, gas release indicator light, pressure switch, the chemical storage and spraying equipment and fire Alarm and control equipment connection. The fire detector, gas fire extinguishing system control panel, manual switch, emergency stop switch, manual/automatic selection switch, alarm bell, buzzer and flashing light, gas release indicator light, and pressure switch are connected through data bus and power line .

Compared with the prior art, the utility model considers the characteristics of deep underground substations, difficulty in fire fighting and smoke discharge, etc., utilizes the linkage characteristics between fire-fighting equipment, and is based on the principle of self-defense and self-rescue to ensure production and safety. Safety, and control the fire at the first time to reduce losses when there is a fire hazard. This system has the functions of automatic/manual spraying of gas to extinguish fire, and reports fire danger and feedback system status.

Description of drawings

Fig. 1 is the utility model schematic diagram.

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Underground substation gas fire extinguishing system, including chemical storage and spraying equipment, fire alarm and control equipment, chemical storage and spraying equipment including high-pressure gas storage cylinders, steel cylinder fixing brackets, electric and manual starters for bottle head valves, pressure indicators, High-pressure hoses, manifolds, one-way valves, safety relief valves, decompression orifice plates, protection area selection valves, gas delivery pipes, open nozzles, fire alarm and control equipment including fire detectors, gas fire extinguishing system control panels , Manual switch, emergency stop switch, manual/automatic selection switch, alarm bell, buzzer and flashing light, gas release indicator light, pressure switch. The fire detector, gas fire extinguishing system control panel, manual switch, emergency stop switch, manual/automatic selection switch, alarm bell, buzzer and flashing light, gas release indicator light, and pressure switch are connected through the data bus and power line .

The protection area of the gas fire extinguishing system of the underground substation is protected by full flooding. After the nitrogen, argon and carbon dioxide gases in the closed space reach the design concentration, they suffocate and extinguish the fire. Each gas protection area is equipped with two-way alarm detectors. When a fire causes any detector in a certain protection area to act, the early alarm signal is sent to the main fire monitoring panel through the gas control panel in the cylinder station, and the fire control panel is activated. The alarm bell in the protection zone will notify the firefighters to go to the scene for inspection. When the temperature and smoke concentration in the protected area reach the fire setting value, the two detectors in the same area will act one after another, and the alarm signal will also be sent to the main fire monitoring panel through the control panel, and the ventilation system in this area will be closed and activated. Buzzers and flashing lights inside and outside the protected area give sound and light alarms for gas pre-spraying, informing the staff in the protected area of the occurrence of a fire and that the fire extinguishing gas is about to be sprayed, and they should evacuate within a 30-second delay. After 30 seconds, the control system opens the electromagnetic actuators of the corresponding number of gas storage bottle bottle head valves and the relevant protection area selection valves, and the gas is evenly transported to the protection area through the combined distribution pipeline and nozzle, and the minimum design is reached within 60 seconds. Concentration of 95%, thus quickly extinguishing the fire. At the same time, the pressure switch action signal set on the gas delivery pipeline is fed back to the fire control panel to confirm the release of gas. The gas fire extinguishing system in each protected area can also be remotely started on the control panel or the main fire monitoring panel. In special cases, it can also be emergency mechanically started at the cylinder station through the manual starter corresponding to each protected area. In addition, a manual/automatic selection switch, an emergency stop switch and an electric manual switch are set outside each entrance and exit of the protected area. The manual/automatic selection switch is in the automatic state when it is normal, and it can also be switched to the manual state. First, the staff will conduct a visual inspection, and then decide whether to use a portable fire extinguisher to extinguish the fire, or turn on the electrical manual switch outside the door, and the gas fire extinguishing system will directly start the fire extinguishing without delay. When the system is in the automatic state and delayed spraying stage, if it is found to be a malfunction, or if there is a fire that can be extinguished with a portable fire extinguisher, you can press the emergency stop switch outside the door to temporarily stop the system. Each protected area is equipped with a pressure relief device, which is mainly composed of a window, a window leaf, an opening control mechanism, and a pressure relief area control mechanism. The pressure relief device is installed on the top of the building wall facing the passage, and it is usually closed. When a fire occurs, the fire extinguishing system releases the fire extinguishing agent, and the air pressure in the fire extinguishing area rises, and a pressure difference is formed inside and outside the window leaf of the pressure relief device. When it reaches a certain value, the window leaf is pushed to open , so as to maintain a certain fire extinguishing concentration in the fire extinguishing area and protect the maintenance structure from damage, and it has the performance of automatically closing after the excess pressure is released and preventing the fire from spreading ^. The gas is discharged to the fire-resistant air duct outside the protected area. The inert gas IG-541 fire extinguishing system can adopt a combined distribution fire extinguishing system (that is, a fire extinguishing system that uses a set of IG-541 storage devices to protect two or more protection areas). The inert gas IG-541 fire extinguishing system is composed of fire extinguishing agent storage device, fire extinguishing agent delivery pipeline, valve, nozzle, alarm and control device and corresponding automatic fire detection and alarm system. The IG-541 gas fire extinguishing system sprays a certain concentration of IG-541 gas to the protection area within the specified time, and makes it evenly fill the fire extinguishing system of the entire protection area, and has three kinds of start-ups: automatic control, manual control and mechanical emergency operation. Way.

Claims (2)

1. underground substation gas fire-fighting system, it is characterized in that, comprise medicament storage and spurt equipment, fire alarm and control appliance, the described medicament storage and the equipment that spurts comprise the high pressure gas storage steel cylinder, the steel cylinder fixed support, electronic and the manual starter of bottle valve, pressure indicator, high-pressure hose, header, check valve, safety relief valve, pressure reducing orifice, the guard plot selector valve, gas transmission pipeline, deluge system, described fire alarm and control appliance comprise fire detector, the gas extinguishing system control panel, hand switch, emergency stop switch, hand, automatic selector switch, alarm bell, buzzer and flashing light, gas discharges indicator lamp, pressure switch, the described medicament storage and the equipment that spurts are connected with fire alarm and control appliance.

2. according to the underground substation gas fire-fighting system described in the claim 1, it is characterized in that the fire detector of being told, gas extinguishing system control panel, hand switch, emergency stop switch, manual selector switch, alarm bell, buzzer and flashing light, gas discharge indicator lamp, pressure switch connects by data/address bus, power line.

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