CN-224220638-U - Cable pit fire extinguishing device and cable pit fire extinguishing system

CN224220638UCN 224220638 UCN224220638 UCN 224220638UCN-224220638-U

Abstract

The utility model discloses a cable pit fire extinguishing device and a cable pit fire extinguishing system, wherein the cable pit fire extinguishing device comprises a fire extinguishing agent container, a fire detection pipe, an alarm device and a pressure gauge, the fire extinguishing agent container is arranged in a cable pit and is used for storing fire extinguishing agent and driving gas, the bottle mouth of the fire extinguishing agent container is sealed through a bottle head valve, the head end of the fire detection pipe is connected with the bottle head valve, the tail end of the fire detection pipe extends into the cable pit and is arranged above a cable along a cable layout path, the pipe wall of the fire detection pipe is provided with a temperature explosion threshold, the alarm device is electrically connected with the bottle head valve and is used for emitting an audible and visual alarm signal when the bottle head valve acts, and the pressure gauge is arranged at the tail end of the fire detection pipe and is used for detecting pressure change of a system. According to the technical scheme, the fire extinguishing efficiency aiming at the cable duct can be improved.

Inventors

ZHANG HUI
Ming Jianpu
DU ZHENGYU
LI JIN
ZENG JIANHUI
BAO WENJUN
HUANG CHUNMING
LEI BENHONG
ZHANG WENJUN

Assignees

中国电力工程顾问集团中南电力设计院有限公司

Dates

Publication Date: 20260512
Application Date: 20250604

Claims (8)

1. A cable pit fire extinguishing device is characterized by comprising The fire extinguishing agent container is arranged in the cable duct and is used for storing fire extinguishing agent and driving gas, and the bottle mouth of the fire extinguishing agent container is sealed through a bottle head valve; The fire detection pipe is connected with the bottle head valve at the head end, extends into the cable trench at the tail end and is arranged above the cable along the cable laying path, and the pipe wall of the fire detection pipe is provided with a temperature explosion threshold; the alarm device is electrically connected with the bottle head valve and is used for sending out an audible and visual alarm signal when the bottle head valve acts, and And the pressure gauge is arranged at the tail end of the fire detection tube and is used for detecting the pressure change of the system.
2. The cable pit fire extinguishing apparatus of claim 1, wherein the bottle head valve is detachably connected with a plurality of fire detection pipes through partition joints, and each fire detection pipe corresponds to an independent partition of the cable pit, so as to realize partition protection of a multi-branch cable pit.
3. The cable pit fire extinguishing device as claimed in claim 2, wherein the partition joint is of a tee joint or a multi-way structure, and is connected with the bottle head valve interface through threads, and the lengths of the fire detecting pipes of the branches are adapted according to the partition distance of the cable pit.
4. The cable pit fire suppression apparatus of claim 1, wherein the fire suppression agent is perfluorinated hexanone and the driving gas is high purity nitrogen.
5. The cable pit fire suppression apparatus of claim 1, wherein the fire suppression agent container supports a floor-mounted and wall-mounted support.
6. The cable pit fire extinguishing apparatus of claim 1, wherein the alarm device is a passive audible and visual alarm, and is turned on by a mechanical action trigger circuit of a bottle head valve without an external power supply.
7. The cable pit fire extinguishing device of claim 1, wherein the pressure gauge is a shock-resistant pointer pressure gauge, and the scale range of the dial covers a working pressure range of the system, so that the system state can be judged quickly during maintenance.
8. A cable pit fire extinguishing system comprising a plurality of cable pit fire extinguishing devices according to any one of claims 1 to 7, wherein a plurality of sets of said cable pit fire extinguishing devices are arranged in sections along a long distance cable pit, each set of said cable pit fire extinguishing devices being independently controlled by zone joints.

Description

Cable pit fire extinguishing device and cable pit fire extinguishing system Technical Field The utility model relates to the technical field of fire-fighting equipment, in particular to a cable pit fire-extinguishing device and a cable pit fire-extinguishing system. Background The cable trench is used as an important component of infrastructure such as power, communication, municipal administration and the like, and relates to multi-department management, and hidden trouble rectification lag is caused due to imperfect cooperation mechanism of cross departments. For example, the problem of strong and weak current common ditches in old urban areas exists for a long time, and unified management is lacking. Cable laying in cable trenches is relatively dense and the environment is humid and poorly ventilated, often because cables age and short circuits are extremely prone to fire. The traditional fire-fighting means hardly meet the fire-fighting protection requirements of the cable duct, for example, a smoke detector is difficult to respond in a smoldering stage of a cable, the temperature-sensitive detector is easily affected by moisture, dust and other environments in the cable duct to cause false alarm or missing alarm, the cable duct is long and narrow in structure and multiple in branches, the traditional point-type detector is limited in coverage range and difficult to accurately position a fire source, the cable duct is vertically communicated, high-temperature smoke is rapidly diffused through a hole which is not plugged in the case of fire, the fire spreading speed is high, three-dimensional combustion is formed, the fire extinguishing difficulty is increased suddenly, the fire in the cable duct is mostly electrified fire, and the traditional water-based fire extinguishing system is not suitable for the scene. Disclosure of utility model The utility model mainly aims to provide a cable pit fire extinguishing device which aims to improve the fire extinguishing efficiency of a cable pit. To achieve the above object, the present utility model provides a cable pit fire extinguishing apparatus comprising The fire extinguishing agent container is arranged in the cable duct and is used for storing fire extinguishing agent and driving gas, and the bottle mouth of the fire extinguishing agent container is sealed through a bottle head valve; The fire detection pipe is connected with the bottle head valve at the head end, extends into the cable trench at the tail end and is arranged above the cable along the cable laying path, and the pipe wall of the fire detection pipe is provided with a temperature explosion threshold; the alarm device is electrically connected with the bottle head valve and is used for sending out an audible and visual alarm signal when the bottle head valve acts, and And the pressure gauge is arranged at the tail end of the fire detection tube and is used for detecting the pressure change of the system. Optionally, the bottle valve is detachably connected with a plurality of fire detection pipes through partition joints, and each fire detection pipe corresponds to an independent partition of the cable duct, so that partition protection of the multi-branch cable duct is realized. Optionally, the partition joint is of a tee joint or a multi-way structure, and is connected with the bottle head valve interface through threads, and the lengths of the branch fire detecting pipes are adapted according to the partition distance of the cable trench. Optionally, the fire extinguishing agent is perfluorinated hexanone, and the driving gas is high-purity nitrogen. Optionally, the fire extinguishing agent container supports a floor-mounted and wall-mounted stand. Optionally, the alarm device is a passive audible and visual alarm, and is conducted through a mechanical action trigger circuit of the bottle head valve, and an external power supply is not needed. Optionally, the manometer is shock-proof pointer manometer, and the dial plate scale scope covers system's working pressure interval, judges the system state fast when being convenient for overhaul. A cable pit fire extinguishing system comprises the cable pit fire extinguishing devices, wherein a plurality of groups of cable pit fire extinguishing devices are arranged along a long-distance cable pit in a segmented mode, and each group of cable pit fire extinguishing devices are independently controlled through partition joints. According to the technical scheme, the integrated high-efficiency fire extinguishing system is constructed by organically combining the fire extinguishing agent container, the fire detection pipe, the alarm device and the pressure gauge, the fire detection pipe has the functions of detecting fire and conveying the fire extinguishing agent, the temperature change of the cable duct can be accurately perceived, the bottle head valve is triggered after the explosion threshold is reached, the fire extinguishing agent is rapidly spr