Nitrogen automatic fire fighting system for sealed cable tunnel

A technology of cable tunnel and fire protection system, which is applied in fire rescue and other directions, can solve the problems of fire expansion and spread, long time, nitrogen can not extinguish the fire, etc., and achieve the effect of shortening the recovery time, reducing losses and reducing investment

Active Publication Date: 2012-09-12
SHOUGANG JINGTANG IRON & STEEL CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

The ultra-fine dry powder in the ultra-fine dry powder fire extinguishing system has strong adsorption. When extinguishing the electrical fire, it also adheres to the electrical equipment, which is difficult to clean. It still takes a long time to restore the operation of the electrical equipment after the fire
[0003] Although nitrogen is a safe, clean and cheap fire extinguishing gas resource, because it exists in a gaseous state, when a fire breaks out in a general (non-airtight) pla

Method used

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  • Nitrogen automatic fire fighting system for sealed cable tunnel
  • Nitrogen automatic fire fighting system for sealed cable tunnel

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Embodiment Construction

[0025] like figure 1 As shown, the closed cable tunnel nitrogen automatic fire-fighting system of the present invention includes a closed cable tunnel 1, and the cable tunnel 1 is provided with a vent 2, which can be circular or square, from figure 1 It can be seen from the figure that the ventilation opening 2 is set on the top of the cable tunnel 1 and communicates with the outside. Of course, it can also be set on the side of the cable tunnel 1 and communicate with the outside through a pipe. The ventilation opening 2 is provided with a ventilation device 3 and a fire damper 4 , the ventilation device 3 is an axial flow fan, of course it can also be a centrifugal fan, the shape of the fire damper 4 corresponds to the shape of the vent 2, the fire damper 4 is usually in an open state, and of course it can also be in a closed state; The cable tunnel 1 is provided with a temperature sensor 5 , and the signal output port of the temperature sensor 5 is electrically connected wit...

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Abstract

The invention discloses a nitrogen automatic fire fighting system for a sealed cable tunnel. The system comprises the sealed cable tunnel which is provided with an air vent, wherein the air vent is provided with a ventilating device and a fire valve; the cable tunnel is internally provided with a temperature sensor; the temperature sensor is electrically connected with an alarm controller; a nitrogen spraying pipeline penetrates through the cable tunnel; nitrogen spraying devices are distributed on the nitrogen spraying pipeline; the nitrogen spraying pipeline is communicated with a nitrogen delivery pipeline which is communicated with a nitrogen source; the nitrogen delivery pipeline is connected with a nitrogen release valve in series; and the nitrogen release valve is electrically connected with the alarm controller. The fire fighting system can be used for rapidly and effectively extinguishing cable fire hazards. By utilizing the fire fighting system, electrical hazards such as grounding, short circuit and shotfiring cannot occur, the purpose of safely extinguishing fire is achieved, the purpose of cleanly extinguishing fire is also achieved, an complex operation of cleaning superfine dry powder for a long time is omitted, and power supply can be rapidly recovered.

Description

technical field [0001] The invention relates to the technical field of fire safety, in particular to a nitrogen automatic fire-fighting system for a closed cable tunnel. Background technique [0002] Electrical and cable equipment generally use fine water mist fire extinguishing system or ultrafine dry powder to extinguish the fire. Although these two fire extinguishing methods can extinguish the fire and reduce the loss caused by the fire to a certain extent, it is very difficult to restore the operation of the electrical equipment after the fire is extinguished. The water in the water mist fire extinguishing system is easy to conduct electricity, and electrical accidents such as grounding, short circuit, and blasting of electrical and cable equipment in contact with water are prone to occur. Therefore, it takes a long time to ventilate and dry the electrical and cable equipment after fire extinguishing before resuming power transmission. The ultra-fine dry powder in the u...

Claims

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Application Information

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IPC IPC(8): A62C3/16A62C35/58
Inventor 王毅李杨邵文策薛万青穆进章王津明张志超史平刘红军赵学军郑斌
Owner SHOUGANG JINGTANG IRON & STEEL CO LTD
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