CN-121987996-A - Foam fire extinguishing device and method

CN121987996ACN 121987996 ACN121987996 ACN 121987996ACN-121987996-A

Abstract

The invention provides a foam fire extinguishing device and a foam fire extinguishing method, wherein the device comprises the following components: the device comprises a floating injection module capable of floating on the inner liquid surface of the storage tank and a liquid supply module connected with the floating injection module through a fire-fighting belt, wherein the liquid supply module is arranged outside the storage tank and used for supplying fire-fighting liquid to the floating injection module through the fire-fighting belt, and the floating injection module can inject the fire-fighting liquid into the storage tank in a direction parallel to the liquid surface. According to the invention, the foam loss rate can be greatly reduced by spraying the fire-fighting liquid on the liquid level in the storage tank, so that accurate spraying is realized, and the fire-fighting efficiency is improved.

Inventors

LANG XUQING
ZHANG RIPENG
YANG ZHE
WANG CHUN
CHENG YIWEI
Cui Piyu

Assignees

中国石油化工股份有限公司
中石化安全工程研究院有限公司

Dates

Publication Date: 20260508
Application Date: 20241101

Claims (12)

1. The foam fire extinguishing device comprises a floating injection module capable of floating on the inner liquid surface of a storage tank and a liquid supply module connected with the floating injection module through a fire-fighting belt, wherein the liquid supply module is arranged outside the storage tank and is used for supplying fire-fighting liquid to the floating injection module through the fire-fighting belt, and the floating injection module can inject the fire-fighting liquid into the storage tank in a direction parallel to the liquid surface.
2. The foam fire extinguishing apparatus according to claim 1, wherein the floating spraying module comprises a floating base, a liquid storage tank provided on an upper surface of the floating base, and a plurality of sprayer assemblies connected with the liquid storage tank, the floating base being used for supporting the liquid storage tank and the sprayer assemblies through floating, and the sprayer assemblies being used for spraying fire fighting liquid in the liquid storage tank to a liquid level inside a storage tank.
3. The foam fire suppression apparatus according to claim 2, wherein a plurality of said sprayer assemblies are uniformly arranged in a circumferential pattern.
4. The foam fire suppression apparatus of claim 2 or 3, wherein the floating spray module further comprises a fire belt interface connected to the fire belt and an internal passage having a first end in communication with the fire belt interface, a second end of the internal passage being connected to the reservoir.
5. The foam fire suppression apparatus of claim 4, wherein the fire belt interface is disposed centrally of a circumference defined by a plurality of the sprayer assemblies.
6. The foam fire extinguishing apparatus according to claim 2, wherein the injector assembly includes a straight flow injector and an umbrella-shaped injector disposed adjacent to the straight flow injector, the straight flow injector being disposed at a lower portion of the umbrella-shaped injector, the umbrella-shaped injector being for injecting an umbrella-shaped liquid film, the straight flow injector being for injecting a straight flow of fire-fighting liquid.
7. The foam fire extinguishing apparatus of claim 6, wherein the spray head of the direct current sprayer is one or more of a round pipe, a square pipe, a net-shaped opening, a porous opening, and a flat mouth.
8. The foam fire extinguishing apparatus according to claim 7, wherein the through-flow ejectors have at least 2 layers of ejection openings, the number of ejection heads per layer being not less than 4 and being uniformly distributed.
9. The foam fire extinguishing device according to claim 1, wherein the fire-fighting belt comprises an outer water belt and an inner water belt arranged inside the outer water belt, an annular cavity is formed between the inner water belt and the outer water belt, and the annular cavity is filled with fire-fighting liquid.
10. The foam fire extinguishing apparatus according to claim 9, wherein the side wall of the outer hose is provided with a plurality of spray holes for spraying the fire fighting liquid outwardly.
11. A method of foam fire suppression comprising the steps of: s1, connecting a fire-fighting belt with a floating injection module, and throwing the floating injection module into a storage tank; S2, connecting the fire-fighting belt with the liquid supply module, injecting foam into the liquid storage cabin of the floating injection module through the fire-fighting belt, and continuously injecting the foam to extinguish the fire by the injector assembly.
12. The foam fire extinguishing method according to claim 11, wherein the step S1 comprises the steps of throwing the floating jet module into the storage tank by using the unmanned aerial vehicle, and injecting low-pressure foam into the fire-fighting zone during the process that the unmanned aerial vehicle approaches the storage tank.

Description

Foam fire extinguishing device and method Technical Field The invention relates to the technical field of foam fire extinguishment, in particular to a foam fire extinguishment device and a foam fire extinguishment method. Background When the current large-scale storage tank is in fire, foam fire is mainly sprayed from the outside of the tank to the inside of the tank by adopting equipment such as a vehicle-mounted fire monitor, a trailer-type fire monitor and a fire-fighting robot of a foam fire engine to extinguish the fire, and the defect that foam jet is easily influenced by wind and hot air flow due to small density, so that the foam jet is seriously lost is overcome. The research shows that when the foam jet flies from outside to inside, the loss of the foam jet is about 60%, the fire extinguishing effect can be greatly reduced, even if the lifting jet fire truck is adopted for spraying, the foam jet flows into the tank in a countercurrent way, the lifting fire truck needs to keep a safe distance of at least 60m with a fire storage tank, the range of the lifting fire truck is only 70-80m, so that most of the foam jet can be lost, the fire extinguishing time is long, the consumption of fire extinguishing agent and fire water is huge, the liquid supply difficulty is great, even fire cannot be extinguished, and finally the storage tank is burnt out. The fixed foam fire extinguishing system installs the foam sprayer at tank wall top, because the foam sprayer dispersedly arranges, the interval is 24m, the foam efflux flows to the liquid level along the tank wall, lead to the foam to destroy seriously under high Wen Guanbi effect, and the foam that flows to the liquid level can't form effectual flow, can't cover whole liquid level fast, form the dead zone of putting out a fire easily, in addition, when the storage tank burns, the tank wall warp can destroy the foam generator of tank deck, cause the foam pipeline fracture, the foam generator can't produce the foam, cause the paralysis of fixed foam fire extinguishing system. For large tank fires, how to scientifically apply foam to the burning liquid surface is a key to efficient fire suppression. The Chinese patent publication No. CN113769309A discloses a household tumbler fire-extinguishing robot, which comprises a shell and a driving chassis arranged in the shell, wherein the driving chassis is provided with a driving assembly, a fire-extinguishing assembly and a detection assembly, the detection assembly is used for detecting indoor environment and controlling the fire-extinguishing assembly to work, the driving assembly comprises a driving roller used for driving the shell to move and a driving motor used for driving the driving roller to rotate, the detection assembly comprises a temperature detection part for detecting temperature and further comprises a controller and a gas detection part, the gas detection part is used for detecting indoor gas, the controller is used for receiving detection signals of the temperature detection part and the gas detection part and controlling the fire-extinguishing assembly to work, the fire-extinguishing assembly comprises a fire extinguisher arranged in the shell and further comprises an ejector used for connecting the fire extinguisher, and the shell is provided with an injection hole for the ejector to pass through. The Chinese patent publication No. CN113813536A discloses a combined fire-fighting system of an unmanned aerial vehicle and a multi-degree-of-freedom mechanical arm fire-fighting robot, which comprises the unmanned aerial vehicle provided with a first water supply mechanism, a water supply vehicle provided with a second reel, and the fire-fighting robot provided with the first reel, the second water supply mechanism, a mounting seat and the mechanical arm mechanism. The invention designs a multi-degree-of-freedom mechanical arm mechanism consisting of three mechanical arms and three telescopic arms for carrying the spray gun, and the multi-degree-of-freedom spray angle of the spray gun can be adjusted through the mechanical arm mechanism. The fire-fighting machine with the first reel and the water supply vehicle with the second reel are arranged, the water supply vehicle is selected as a fire-fighting robot or an unmanned aerial vehicle for fire extinguishment, and the robot moves along with the unmanned aerial vehicle in different directions. The Chinese patent publication No. CN112587838A discloses a high-protection instant fire-extinguishing robot adopting a large fire-extinguishing ball and an operation method, and the robot comprises a tripod thermal imaging camera, a lifting platform, an illuminating lamp, a range radar, a walking auxiliary camera, an alarm device, a controller, a vehicle body, a chassis, an infrared heat tracking and aiming device, a fire-extinguishing ball transmitting cylinder, a fire-extinguishing ball, an electromagnetic air tap, a compressed gas tank, an electromagnetic ball