CN1958096A

CN1958096A - Zonal asphyxiation fire extinguisher system for underground cavity

Info

Publication number: CN1958096A
Application number: CN 200610032341
Authority: CN
Inventors: 彭立敏
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-09-28
Filing date: 2006-09-28
Publication date: 2007-05-09

Abstract

An isolating-type fire extinguishing system for underground space is composed of a fire accident monitoring and controlling center and several isolating curtains made of fire-proof smoke-isolating material. It features that an underground space is divided into several small spaces by said movable isolating curtains to isolate air flow, so extinguishing the fire due to oxygen defficiency.

Description

Zonal asphyxiation fire extinguisher system for underground cavity

Affiliated technical field

The present invention relates to a kind of system that stamps out a fire, specifically refer to a kind of utilize fire-resistant curtain with the underground space be separated into independent fire compartment from fire-smothering system.

Background technology

Along with rapid economic development, China is increasing to the demand of the energy, and the shared ratio of its PetroChina Company Limited. is in rising trend, and most of crude oil and petroleum product internal transportation are finished by railway.China be in the world railway tunnel quantity at most, the longest country of total kilometrage.Chinese Railway operation tunnel increases gradually, it is heavy increasingly to transport former wet goods dangerous substances Mission Day, under the situation that railway constantly raises speed, the extensive oil plant fire of will stopping fully to grow up in the tunnel is very difficult, and the tunnel is the throat thoroughfare of railway transportation, although the probability of breaking out of fire is lower, in case take place to produce extremely serious consequence, therefore need badly targetedly and study, significance is arranged guaranteeing the railway tunnel operation security.

Put out both at home and abroad at present that the tank train fire adopts the method at sandy soil bag shutoff tunnel face or shutoff hole, fried tunnel usually in the tunnel in, make inner cause of fire anoxic greatly and suffocate.But this extinguishing method is employed many, the consuming time length of manpower and materials, fire is to tunnel structure and circuit destruction is big, the interruption of communication time is long.In view of this, various countries carry out some new extinguishing method researchs and new fire extinguishing equipment development one after another, as fire extinguishing train, fine mist fire-fighting method, mobile water pocket plugging method etc.But said method and equipment be the oil tank big fire part that also comes with some shortcomings at the tunnel, show: fire extinguishing train cost is high, configuration is too much economical inadequately, disposed to receive at least after the fire alarm and needed long-distance raid with garrisoning from arriving in the scene of fire, consuming time many, incur loss through delay opportunity of combat, and can only play auxiliary fire extinguishing for fire disasters such as oil products.Thin water smoke method produced effect at the fire initial stage very much, but after fire expands certain scale to, was difficult to allow water smoke shroud the whole scene of a fire, and the hand-held fine water fog generator of rescue personnel is also unlikely too in putting out a fire near the scene of a fire in this class fire.Mobile water pocket plugging method still is in conceptual phase at present, drop into practical application and also need obtain the support of fire rescue train, and from finding that fire needs the long period to approaching the scene of a fire, the shutoff fire extinguishing need just can be carried out after the staff in tunnel evacuation finishes, and intensity of a fire can constantly enlarge during this, increases the fire extinguishing difficulty.Add that the fire extinguishing personnel need go deep into tunnel fire, must carry to breathe and use oxygen,, make rescue be absorbed in interruption in case the shock wave that produces of blasting will bring injury to rescue facility and personnel.At application number is that 200510031889.0 patent application proposes to utilize air curtain that the underground space is separated into the method that several fire compartments make the oil plant big fire suffocate and put out, exist adjacent sectors gas can local exchange, air curtain control system complexity, equipment fire resistance need stand unfavorable factors such as big fire test.

Summary of the invention

The purpose of this invention is to provide a kind of simple in structure, effective ways that can put out tunnel tank train fire fast, the present invention mainly partly is made up of fire monitoring, control centre, subregion curtain etc., its subregion curtain is made by the fire proofing material that can reach certain fire endurance, but rolling at ordinary times or fold, when detecting the condition of a fire or controlling under the unlatching artificial, can launch quickly, the underground space is separated into several fire compartments.Because the temperature high pressure in the fire subregion is big, fire smoke can be excessive via the space between subregion curtain and tunnel, and fresh air outside can not be replenished and entered in the scene of a fire, and the oxygen expenditure in the fire subregion is low to a certain degree, and the big fire meeting is extinguished because of anoxic.

Fig. 1, Fig. 2 are with fire burning and extinguishing process in Fire Dynamics Simulator (Version 4) the software simulation tunnel, all long 600 meters in tunnel, and its cross section is wide 10 meters high 6 meters rectangles, fire scale is 10MW.In Fig. 1, fire compartment is divided with air curtain in the tunnel, back 400 seconds fire smokes of burning beginning are full of the fire section, peak to 2160 seconds temperature, decay afterwards to Hong combustion in 3018 seconds, was extinguished in 3140 seconds, also had repeatedly local resume combustion to 4900 seconds during with a loud crash, after 4900 seconds, decay gradually until extinguishing.In Fig. 2, fire compartment is divided with movable curtain in the tunnel, and the back 330 seconds flue gases that catch fire are full of the fire section, peaks to 1440 seconds temperature, decay was extinguished to 2160 seconds afterwards, and 2880 seconds with a loud crash, extinguish afterwards, gas temperature descends gradually in the tunnel, and the fire section all is lower than 80 ℃ during to 3600 seconds.By comparing two analog results as can be known, it is shorter than air-curtain partitioned attack time that employing activity curtain is divided fire compartment, the fire extinguishing better effects if.

In sum, after the technical scheme more than adopting, movable curtain subregion can put out the extensive oil truck fire in the railway tunnel fast and effectively, and implementing the back has significance to guaranteeing operation of railway tunnel safety and national economy sound development.

Description of drawings

Fig. 1 is air-curtain partitioned tunnel fire hazard simulation drawing.(a be 1080 seconds, b are that 2160 seconds, c are that 3018 seconds, d are that 3140 seconds, e are 4919 seconds, vertical section, tunnel temperature profile when f is 5194 seconds)

Fig. 2 is a curtain subregion tunnel fire hazard simulation drawing.(a be 720 seconds, b are that 1440 seconds, c are that 2160 seconds, d are that 2455 seconds, e are that 2880 seconds, f are 3540 seconds, vertical section, tunnel temperature profile when g is 3600 seconds)

Fig. 3 is the schematic diagram of curtain of the present invention when not putting down.

Fig. 4 is the schematic diagram of curtain of the present invention when putting down.

Fig. 5 is the elevation of curtain of the present invention.

Fig. 6 is the curtain elevation that the present invention has opening.

Among the figure: fire compartment 1, ignition point 2, fire smoke 3, curtain 4, fire-resistant side wall 5, fire prevention top board 6, seam 7, opening 8.

The specific embodiment

Below in conjunction with accompanying drawing embodiments of the present invention are described further:

As shown in Figure 3, Figure 4, movable curtain 4 is installed at a certain distance in the tunnel, just becomes a fire compartment 1 between the twice curtain 4, these curtains 4 are made by the fire proofing material that can reach certain fire endurance, but rolling at ordinary times or fold.In case fire detection system detects the existence of ignition point 2 or fire smoke 3 by temperature inductor, smoke sensing device, will send fire alarm to control centre, or there is the people to report fire alarm to control centre, after confirming fire location, control centre starts curtain 4 and puts down, and the tunnel is separated into several fire compartments 1.Because the temperature high pressure in the fire subregion is big, fire smoke 3 can be excessive via the space between subregion curtain 4 and tunnel, and fresh air outside can not be replenished and entered in the scene of a fire, and the oxygen expenditure in the fire subregion is low to a certain degree, and the big fire meeting is extinguished because of anoxic.When there is big blast in the both sides, tunnel, adopts curtain 4 to divide the relative air curtain of fire compartments and can reduce fresh air and enter the scene of a fire, thereby shorten attack time.

Its cross section of the underground spaces such as tunnel may not be a rectangle, fire-resistant side wall 5 can be set as shown in Figure 5 and fire prevention top board 6 surrounds out a bit of coffin, and at this installation activity curtain 4, with the tunnel wall wedging, fire smoke 3 is flowed in order; Fire-resistant side wall 5 and fire prevention top board 6 can join together with tunnel wall, also can join together with the framework of movable curtain 4 with the tunnel wall disengaging.Since might produce in the fire subregion Hong fire friedly, or have vehicle will pass curtain 4, for avoiding causing destruction, can on curtain 4, preset and stitch 7 curtain 4, curtain 4 can disperse upwards to kick up and dissolve the external force effect.In the place that has personnel to pass through opening 8 is set on curtain 4 as shown in Figure 6, makes things convenient for evacuating personnel.If it is limited that curtain 4 is installed in the tunnel, can as Fig. 6, the local cross section, tunnel that enlarges, curtain 4 places be installed.

Be the 4 work longer times of protection curtain, can protect to curtain 4 water sprays.

In order further to shorten attack time, can in the tunnel, preset pipeline, so that warm oneself in front of a fire place section filling liquid nitrogen or other extinguishing fluid or gas.

The present invention also can be widely used in preventing fires in the space of numerous underground spaces such as vcehicular tunnel, subway sectional tunnel and field, station, market place builet below the ground, underground parking and underground storehouse or relative closure and set up defences except that the railway tunnel.

Claims

1, a kind of Zonal asphyxiation fire extinguisher system for underground cavity, mainly be made up of control centre, subregion curtain, it is characterized in that: curtain is made by refractory material, normal condition rolling or fold, can launch or hang down during fire, the underground space is separated into several fire compartments.

2, Zonal asphyxiation fire extinguisher system for underground cavity according to claim 1 is characterized in that: the underground space is equipped with fire-resistant side wall or top board in that the curtain place is set.

3, Zonal asphyxiation fire extinguisher system for underground cavity according to claim 1 is characterized in that: offer seam on the curtain.

4, Zonal asphyxiation fire extinguisher system for underground cavity according to claim 1, it is characterized in that: curtain is provided with opening.

5, Zonal asphyxiation fire extinguisher system for underground cavity according to claim 1 is characterized in that: the curtain top is provided with water injector.

6, Zonal asphyxiation fire extinguisher system for underground cavity according to claim 1 is characterized in that: the curtain framework is provided with fire resisting shield.

7, Zonal asphyxiation fire extinguisher system for underground cavity according to claim 1 is characterized in that: the underground space is preset with the pipeline and the control valve of filling liquid nitrogen.