CN203108028U - Automatic-cooling fire control and fire extinguishment system of inflammable reservoir vessel - Google Patents

Abstract

The utility model discloses an automatic-cooling fire control and fire extinguishment system of an inflammable reservoir vessel, which can be used for preventing fire hazards and is capable of automatically extinguishing fire when a fire behavior happens. A water outlet tube of a water tank is connected with a water inlet of an internal cooling water tube by a water pump and a water inlet pipeline; an internal cooling water inlet control solenoid valve is arranged on the water inlet pipeline; a pressure sensor is arranged at the water inlet of the internal cooling water tube; a water outlet of the internal cooling water tube is connected with a water inlet of an external wall-surface cooling water tube by an internal cooling water outlet control solenoid valve; a plurality of water spraying holes towards the external wall surface of a container are formed in the external wall-surface cooling water tube; a signal output end of a pressure sensor is connected with a signal input end of an alarm controller; and a control signal output end of the alarm controller is connected with the water pump, the internal cooling water inlet control solenoid valve, the internal cooling water outlet control solenoid valve and a high-pressure pump of a water mist fire extinguishing device. When the fire behavior happens, the system can perform cooling fire extinguishment on the internal part and the external part of the container, so that loss caused by the fire hazard is lowered.

Description

The combustibles reservoir vessel cools off the fiery fire extinguishing system of control automatically

Technical field

The utility model relates to the fire prevention field, particularly relates to a kind of combustibles reservoir vessel and cools off the fiery fire extinguishing system of control automatically.

Background technology

Develop rapidly along with national economy, the application in producing, living of oil and oil product more and more widely, all kinds of oil depots, gas station are increasing, and oil tank is the of paramount importance equipment of storing bulk oil plant, and the oil tank oil storage is the most general a kind of oil storage mode of current application.The various oil products that store in the oil tank generally all have character such as volatile, easy loss, easy firing, explosive, in case breaking out of fire will cause great loss.

In order to guarantee Oil Safety, China set up oil conservation system in 2003, compared foreign country and relatively lagged behind, and still lacked the Oil Safety early warning Emergency System of optimizing.Huge oil reserve must bring bulk petroleum to store the construction of tank field, oil with and the inflammable and explosive property of goods, must bring a series of safety problem.The loss that the petroleum tank region fire incident that takes place for many years causes is huge, and lesson is painful, makes people recognize importance and the urgency of petroleum tank region safety problem more fully.Other combustibles store and also have similar problem.

At present, the fire-fighting of combustibles storage area mainly is that automatic fire alarm system is installed in the tank farm.When breaking out of fire, automatic fire alarm system sends alarm signal, by manually dialing the fire alarm phone, waits for fire-fighting and rescue again.In the process of waiting for fire-fighting and rescue, manually use extinguishing device to put out a fire.Because the inflammable and explosive property of oil tank etc., in case breaking out of fire, only depending on the individual to use common extinguishing device is to be difficult to control, and in case can not find the very first time, will cause an immeasurable loss.Often after the breaking out of fire, when waiting for that the fire-fighting and rescue personnel arrive in, the prime time of rescue be can delay again, therefore, the speed of fire development and fire hazard grade slowed down, the time is provided is the important means that reduces fire damage for fire fighting and rescue is shown up.

The utility model content

The purpose of this utility model is at the technological deficiency that exists in the prior art, can fire preventing takes place and provide a kind of, and when the condition of a fire took place, combustibles reservoir vessel that can self-extinguishing cooled off the fiery fire extinguishing system of control automatically.

For realizing that the technical scheme that the purpose of this utility model adopts is:

A kind of combustibles reservoir vessel cools off the fiery fire extinguishing system of control automatically, comprise water tank, water pump, inner cooling water pipe, outside wall cooling water pipe, inner cooling water water inlet control magnetic valve, inner cooling water goes out the water management magnetic valve, pressure sensor for detection of inner cooling water pipe internal pressure, alarm controller, fine spray extinguisher, the outlet pipe of described water tank is connected with the water inlet of described inner cooling water pipe by described water pump and inlet channel, described inner cooling water water inlet control magnetic valve is installed on the described inlet channel, the water inlet of described inner cooling water pipe is equipped with described pressure sensor, the delivery port of described inner cooling water pipe cools off the water management magnetic valve by described inside and is connected with the water inlet of described outside wall cooling water pipe, and described outside wall cooling water pipe is provided with a plurality of hole for water sprayings towards the external container wall; The signal output part of described pressure sensor is connected with the signal input part of described alarm controller, and the control signal output of described alarm controller is connected with the high-pressure pump that described water pump, inner cooling water water inlet control magnetic valve, inner cooling water go out water management magnetic valve and described fine spray extinguisher respectively; Under the normal condition, after described inner cooling water pipe was filled water, described inner cooling water water inlet control magnetic valve and inner cooling water went out the water management magnetic valve and are in closed condition; When the condition of a fire took place, described inner cooling water water inlet control magnetic valve and inner cooling water went out the water management valve opening solenoid and open.

Described inner cooling water pipe is coil pipe.

Described inner cooling water pipe and outside wall cooling water pipe are copper pipe.

Described inner cooling water pipe and outside wall cooling water pipe are installed on the combustibles reservoir vessel by support respectively.

Compared with prior art, the beneficial effects of the utility model are:

1, automatic cooling of the present utility model is controlled fiery fire extinguishing system and at internal tank cooling water pipe is installed, and can reduce the temperature of the combustibles of internal tank, the generation of fire preventing.

2, fiery fire extinguishing system detects water inlet pipe by pressure sensor pressure variation is controlled in automatic cooling of the present utility model, the generation of the fire of perception in time, and when the condition of a fire takes place, in time open the inside and outside cooling water of container, to carrying out extinguishing by cooling inside and outside the container, can reduce loss and casualties that fire causes.

3, to control fiery fire extinguishing system simple in structure, easy to use in automatic cooling of the present utility model.

Description of drawings

Figure 1 shows that the utility model combustibles reservoir vessel cools off the schematic diagram of the fiery fire extinguishing system of control automatically;

Figure 2 shows that the vertical view of external refrigeration water pipe;

Figure 3 shows that the vertical view of inner cooling system;

Figure 4 shows that the cooling system vertical view.

Among the figure: 1. combustibles container, 2. inner cooling water pipe, 3. outside wall cooling water pipe, 4. hole for water spraying, 5. inner cooling water goes out the water management magnetic valve, and 6, pressure sensor, 7. inner cooling water water inlet control magnetic valve, 8. inlet channel, 9. water pump, 10. water tank, 11. fine spray extinguishers, 12. alarm controller, 13. supports.

The specific embodiment

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

The utility model combustibles reservoir vessel cools off the control schematic diagram of fiery fire extinguishing system such as Fig. 1-shown in Figure 4 automatically, comprise water tank 10, water pump 9, inner cooling water pipe 2, outside wall cooling water pipe 3, inner cooling water water inlet control magnetic valve 7, inner cooling water goes out water management magnetic valve 5, pressure sensor 6 for detection of inner cooling water pipe internal pressure, alarm controller, fine spray extinguisher 11, the outlet pipe of described water tank 10 is connected with the water inlet of described inner cooling water pipe 2 by described water pump 9 and inlet channel 8, described inner cooling water water inlet control magnetic valve 7 is installed on the described inlet channel 8, the water inlet of described inner cooling water pipe 2 is equipped with described pressure sensor 6, the delivery port of described inner cooling water pipe 2 cools off water management magnetic valve 5 by described inside and is connected with the water inlet of described outside wall cooling water pipe 3, and described outside wall cooling water pipe 3 is provided with a plurality of hole for water sprayings 4 towards the external container wall.The signal output part of described pressure sensor 6 is connected with the signal input part of described alarm controller 12, and the control signal output of described alarm controller 12 is connected with the high-pressure pump that water pump 9, described inner cooling water water inlet control magnetic valve 7, inner cooling water go out water management magnetic valve 5 and described fine spray extinguisher 11 respectively.Under the normal condition, after described inner cooling water pipe 2 is filled water, described inner cooling water water inlet control magnetic valve 7 and inner cooling water go out water management magnetic valve 5 and are in closed condition, and when the condition of a fire took place, described inner cooling water water inlet control magnetic valve 7 and inner cooling water went out water management magnetic valve 5 and open.

In order to reach best cooling effect, described inner cooling water pipe 2 is coil pipe.Described inner cooling water pipe 2 and outside wall cooling water pipe 3 are copper pipe.

Described inner cooling water pipe and outside wall cooling water pipe are installed on the combustibles reservoir vessel 1 by support 13 respectively.

Be that 125 cubic metres gasoline cistern, inner cooling water pipe employing copper pipe are example with volume below, provide corresponding inner cooling water pipe size and pressure following temperature variation relation:

125 cubic metres of oil tank rates of heat release calculate:

Volume: $V=\frac{\mathrm{\&pi;}}{4}\&times;{\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="HDA00002765047500011.png,HDA00002765047500021.png"\; state="\{\{state\}\}">D</figure-callout>}}^2\&times;H---\left(1\right)$

D is tank diameter in the formula (1), and H is tank elevation, economizes principle most according to material and expense, and then H ≈ 2R takes all factors into consideration, and draws D=4m, H=10m.

HRR formula: Q=M Δ H _cA _f(2)

In the formula (2): M is the mass burning rate (kgm of unit are ^-2S ^-1);

M＝0.55×(1-exp(-kβD))（3）

Learn from else's experience and test constant, k β=2.1m ^-1, gasoline density p=0.725kg/L, Δ H _cBe combustion heat value (Jg ^-1), Δ H _c=43700000J/kg, A _fBe burning area,

$A_f=\frac{\mathrm{\&pi;}{\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="HDA00002765047500011.png,HDA00002765047500021.png"\; state="\{\{state\}\}">D</figure-callout>}}^2}{4};---\left(4\right)$

(1-4) can draw Q=30180.17KW according to formula.Cooling system can be taken away 10% heat, i.e. the cooling system heat q=3018017W that can take away.

The calculating of inner cooling water pipe length l:

The heat convection formula: $q=h_m\mathrm{A\&Delta;}{t}_m=\mathrm{\&rho;u}\frac{\mathrm{\&pi;}{{\mathrm{<figure-callout\; id="2"\; label="d\; m"\; filenames="HDA00002765047500011.png,HDA00002765047500021.png"\; state="\{\{state\}\}">d</figure-callout>}}_m}^2}{4}{c}_p(t_{\mathrm{out}}-t_{\mathrm{in}})---\left(5\right)$

T in the formula _InBe the temperature of cooling water in the inner cooling water pipe, t _In=25 ℃; t _OutBe the exterior wall surface temperature of inner cooling water pipe, t _Out=100 ℃; A is heat exchange area, Δ t _mBe qualitative temperature,

ρ is the density of water, ρ=980kg/m ³U is cooling water flow velocity in the pipe, u=2m/s; c _pBe specific heat capacity, c _p=4.180KJ/ (kgK); d _mBe inner cooling water pipe diameter, get inner cooling water pipe d _m=17.4mm.

Can check in thermal conductivity factor λ=0.66W/ (mK), kinematic coefficient of viscosity v _f=0.450 * 10 ^-6m ²/ s, Prandtl number Pr _f=2.9, then

Reynolds number $R{e}_f=\frac{\mathrm{ud}}{v_f}=\frac{5\&times;0.05}{0.450\&times;{10}^{-6}}=7.7\&times;{10}^4---\left(6\right)$

Get inner cooling water pipe inner wall temperature t _w=100 ℃, find,

η _w=0.295m ²/ s, η _f=0.46m ²/ s, then

Nu-number $\mathrm{Nu}=0.027{\mathrm{Re}}_f^{0.8}{\mathrm{<figure-callout\; id="1"\; label="Pr\; f"\; filenames="HDA00002765047500012.png,HDA00002765047500021.png"\; state="\{\{state\}\}">Pr</figure-callout>}}_f^{}{\left(\frac{{\mathrm{\&eta;}}_f}{{\mathrm{\&eta;}}_w}\right)}^{0.14}=333.18---\left(7\right)$

Convection transfer rate $h_m=\frac{{\mathrm{\&lambda;}}_f}{d}{\mathrm{Nu}}_f=\frac{0.66}{0.0174}\&times;333.18=12637.77w/{\mathrm{<figure-callout\; id="2"\; label="m"\; filenames="HDA00002765047500011.png,HDA00002765047500021.png"\; state="\{\{state\}\}">m</figure-callout>}}^2\&CenterDot;k---\left(8\right)$

$l=\frac{q}{\mathrm{\&pi;dh}(t_w-t_f)}=\frac{3018017}{\mathrm{\&pi;}\&times;0.0174\&times;12637.77\&times;37.5}=117m---\left(9\right)$

Therefore, draw inner cooling water pipe d=0.0174m, length l=117m.

According to above-mentioned computational process, following table is 3 kinds of required inner cooling water pipe length of different-diameter oil tank.

The required inner cooling water pipe length of table 1 different-diameter oil tank

The anticipation of pipe internal pressure is calculated:

Give the temperature variant relation of outlet pipe internal pressure according to the PR equation down:

The PR equation $p=\frac{\mathrm{RT}}{V_m-b}-\frac{a\left(T\right)}{{{\mathrm{<figure-callout\; id="2"\; label="V\; m"\; filenames="HDA00002765047500011.png,HDA00002765047500021.png"\; state="\{\{state\}\}">V</figure-callout>}}_m}^2+2V_{m}b-b^2}---\left(10\right)$

In the formula (10), p is the pressure of system, kPa; T is the temperature of system, K;

B is constant

$b=0.0778\frac{{\mathrm{RT}}_c}{p_c}---\left(11\right)$

Volume $V=\mathrm{\&pi;}\&CenterDot;{\left(\frac{17.4\&times;{10}^{-3}}{2}\right)}^{2}l=0.0278m^3---\left(12\right)$

Molal volume $V_m=\frac{V\&CenterDot;M}{m}=0.018{\mathrm{<figure-callout\; id="3"\; label="m"\; filenames="HDA00002765047500011.png,HDA00002765047500012.png"\; state="\{\{state\}\}">m</figure-callout>}}^3/\mathrm{kmol}$

Constant $a\left(T\right)=\mathrm{\&alpha;}\&CenterDot;a\left(\mathrm{Tr}\right)=0.45724\frac{R^2{T}_c^2}{p_c}\&CenterDot;\mathrm{\&alpha;}---\left(13\right)$

$\mathrm{\&alpha;}={\{1+m[1-{\left(\frac{T}{T_c}\right)}^{0.5}\left]\right\}}^2---\left(14\right)$

m＝0.37464+1.54266ω-0.26992ω ²（15）

$\mathrm{\&omega;}=\frac{0.781}{Z_c}-2.667---\left(17\right)$

P _cBe water critical pressure, p _c=227.98 * 10 ⁵Pa; T _cBe water stagnation temperature, T _c=373.5K; R is gas constant, R=8.314kJ/ (kmolK); α is the temperature funtion formula; T _rBe gas reduced temperature, T _r=T/T _c; V is gas specific volume, m ³/ kmol; ω is eccentric factor, Z _c=0.29.

Draw according to above-mentioned:

m＝0.4

a(T _r)＝0.193

$\mathrm{\&alpha;}=[{1.4-0.4{\left(\frac{T}{T_c}\right)}^{0.5}]}^2$

$P=\frac{\mathrm{RT}}{V_m-b}+\frac{a\left(T\right)}{{{\mathrm{<figure-callout\; id="2"\; label="V\; m"\; filenames="HDA00002765047500011.png,HDA00002765047500021.png"\; state="\{\{state\}\}">V</figure-callout>}}_m}^2+{2V}_{m}b-{\mathrm{<figure-callout\; id="2"\; label="b"\; filenames="HDA00002765047500011.png,HDA00002765047500021.png"\; state="\{\{state\}\}">b</figure-callout>}}^2}=464T+{34T}^{0.5}-1167---\left(17\right)$

On fire when oil tank, because inner cooling water pipe is copper material, heat-conducting effect is good, and therefore, water temperature rapidly increases to 100 ℃ in the inner cooling water pipe pipe, and then according to formula (17) as can be known, manage internal pressure this moment is 0.17Mpa.

Therefore, when alarm controller detects the force value arrival 0.17Mpa of pressure sensor, alarm controller sends control signal to the high-pressure pump that water pump 9, inner cooling water water inlet control magnetic valve 7, inner cooling water go out in water management magnetic valve 5 and the fine spray extinguisher, the high-pressure pump that inner cooling water water inlet control magnetic valve 7, inner cooling water go out in water management magnetic valve 5 and the fine spray extinguisher is opened, and puts out a fire to the oil tank water spray by the shower nozzle of fine spray extinguisher.

When storing oil tank, open water pump 9 and inner cooling water water inlet control magnetic valve 7, closing inner cooling water goes out water management magnetic valve 5 and makes the aqueous medium in the water tank flow into inner cooling water pipe 2 by inlet channel 8, close inner cooling water pipe entering water electromagnetic valve 7 after inner cooling water pipe is full of water, stop water pump 9.Cooling water can reduce the oil tank internal temperature, plays cooling oil tank effect, and fire preventing takes place.In case oil tank is on fire, temperature raises in the oil tank, inner cooling water pipe internal pressure increases suddenly, when the force value that detects pressure sensor when alarm controller reaches predetermined value, alarm controller is to inner cooling water water inlet control magnetic valve 7, the high-pressure pump that inner cooling water goes out in water management magnetic valve 5 and the fine spray extinguisher sends control signal, high-pressure pump in the fine spray extinguisher is opened, thin water smoke spray by fine spray extinguisher is put out a fire to oil tank cooling on fire, meanwhile, open water pump 9, inner cooling water water inlet control magnetic valve 7, inner cooling water goes out water management magnetic valve 5 and opens simultaneously, make aqueous medium in the water tank inlet channel of flowing through, inner cooling water pipe enters into outside wall cooling water pipe, aqueous medium externally sprays to the oil tank wall by hole for water spraying in the wall cooling water pipe, thereby plays oil tank cooling cooling effect on fire.

Of the present utility model simple in structure, can carry out very first time extinguishing by cooling to oil tank on fire by this device, can reduce economic loss and casualties.

The above only is preferred embodiment of the present utility model; should be noted that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims (4)

1. a combustibles reservoir vessel cools off the fiery fire extinguishing system of control automatically, it is characterized in that, comprise water tank, water pump, inner cooling water pipe, outside wall cooling water pipe, inner cooling water water inlet control magnetic valve, inner cooling water goes out the water management magnetic valve, pressure sensor for detection of inner cooling water pipe internal pressure, alarm controller, fine spray extinguisher, the outlet pipe of described water tank is connected with the water inlet of described inner cooling water pipe by described water pump and inlet channel, described inner cooling water water inlet control magnetic valve is installed on the described inlet channel, the water inlet of described inner cooling water pipe is equipped with described pressure sensor, the delivery port of described inner cooling water pipe cools off the water management magnetic valve by described inside and is connected with the water inlet of described outside wall cooling water pipe, and described outside wall cooling water pipe is provided with a plurality of hole for water sprayings towards the external container wall; The signal output part of described pressure sensor is connected with the signal input part of described alarm controller, and the control signal output of described alarm controller is connected with the high-pressure pump that described water pump, inner cooling water water inlet control magnetic valve, inner cooling water go out water management magnetic valve and described fine spray extinguisher respectively; Under the normal condition, after described inner cooling water pipe was filled water, described inner cooling water water inlet control magnetic valve and inner cooling water went out the water management magnetic valve and are in closed condition; When the condition of a fire took place, described inner cooling water water inlet control magnetic valve and inner cooling water went out the water management valve opening solenoid and open.

2. combustibles reservoir vessel according to claim 1 cools off the fiery fire extinguishing system of control automatically, it is characterized in that described inner cooling water pipe is coil pipe.

3. combustibles reservoir vessel according to claim 1 and 2 cools off the fiery fire extinguishing system of control automatically, it is characterized in that described inner cooling water pipe and outside wall cooling water pipe are copper pipe.

4. combustibles reservoir vessel according to claim 3 cools off the fiery fire extinguishing system of control automatically, it is characterized in that described inner cooling water pipe and outside wall cooling water pipe are installed on the combustibles reservoir vessel by support respectively.

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