CN209347970U - A kind of Urban Underground pipe gallery system carrying out safeguard protection using nitrogen - Google Patents
A kind of Urban Underground pipe gallery system carrying out safeguard protection using nitrogen Download PDFInfo
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- CN209347970U CN209347970U CN201821938040.0U CN201821938040U CN209347970U CN 209347970 U CN209347970 U CN 209347970U CN 201821938040 U CN201821938040 U CN 201821938040U CN 209347970 U CN209347970 U CN 209347970U
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Abstract
The utility model discloses a kind of Urban Underground pipe gallery systems that safeguard protection is carried out using nitrogen; including sequentially connected nitrogen feeder (10), nitrogen gas delivery-line (20) and underground pipe gallery (30); nitrogen gas delivery-line (20) is equipped with nitrogen gas control valve door, and the nitrogen in nitrogen feeder (10) can be delivered in underground pipe gallery (30) by nitrogen gas delivery-line (20).This has the function of electric cabin fire extinguishing and datonation-inhibition two kinds of natural gas cabin using the Urban Underground pipe gallery system that nitrogen carries out safeguard protection simultaneously; have compared to hot aerosol and superfine dry powder fire-distinguishing system invest low, extinguishing chemical can permanent storage do not fail and do not need the advantage of replacement, compare CO2Fire extinguishing system, which has, invests advantage low, highly-safe to people, great prospect.
Description
Technical field
The utility model relates to a kind of Urban Underground pipe gallery systems that safeguard protection is carried out using nitrogen.
Background technique
Urban Underground pipe gallery is several including electric cabin, hydro-thermal cabin, bilge tank, combustion gas cabin, wherein being laid in electric cabin big
Measure cable, it may occur that electrical fire, combustion gas are laid with natural gas line in cabin, once explosion accident can occur for natural gas leaking,
Thus the risk in electric cabin and combustion gas cabin is larger, should take certain safeguard measure.Electric cabin at present mainly using hot aerosol or
Ultra-fine dry powder fire-fighting mode, then there are no the measures for inhibiting gas explosion in combustion gas cabin.Hot aerosol or being of ultra-fine dry powder
Synthesis medicament is learned, it is expensive, and have using validity period, more than new medicament is needed replacing after medicament validity period, buy new medicament
Disbursement again.Hot aerosol or ultra-fine dry powder pollute the environment after spurting simultaneously, not enough cleaning, environmental protection.
Utility model content
In order to enable the fire-fighting mode of pipe gallery to reach cleaning, environmental protection, safe and efficient, economic.The utility model mentions
A kind of Urban Underground pipe gallery system that safeguard protection is carried out using nitrogen is supplied, this carries out the city of safeguard protection using nitrogen
City's underground pipe gallery system has the function of the fire extinguishing of electric cabin and datonation-inhibition two kinds of natural gas cabin simultaneously, compared to hot aerosol and ultra-fine dry
Powder fire extinguishing system have invest low, extinguishing chemical can permanent storage do not fail and do not need the advantage of replacement, compare CO2Fire extinguishing system tool
Have and invests advantage low, highly-safe to people, great prospect.
The utility model solves that technical application used by its technical problem is novel to be: a kind of to carry out safe guarantor using nitrogen
The Urban Underground pipe gallery system of shield, including sequentially connected nitrogen feeder, nitrogen gas delivery-line and underground integrated pipe
Corridor, nitrogen gas delivery-line are equipped with nitrogen gas control valve door, and nitrogen gas delivery-line can convey the nitrogen in nitrogen feeder
To underground pipe gallery.
Underground pipe gallery contains electric cabin and combustion gas cabin, and nitrogen gas delivery-line is connect with electric cabin and combustion gas cabin, nitrogen conveying
Nitrogen in nitrogen feeder can be delivered in the electric cabin and combustion gas cabin of underground pipe gallery by pipeline.
Nitrogen feeder contains in storage cylinder air supply system, nitrogen making machine group air supply system and liquid nitrogen storage tank air supply system
It is one or more.
The storage cylinder air supply system contains nitrogen cylinder and gas cylinder packaging lattice, which is set to gas cylinder packaging lattice
It is interior.
The nitrogen making machine group air supply system contains sequentially connected nitrogen making machine group, supercharger and nitrogen air accumulator.
The liquid nitrogen storage tank air supply system contains sequentially connected liquid nitrogen storage tank, liquid nitrogen pump, air-heating type gasifier and nitrogen
Air accumulator.
Nitrogen gas delivery-line contains sequentially connected nitrogen conveying main pipeline, electric cabin nitrogen conveying branches pipeline and combustion gas cabin
Nitrogen conveying branches pipeline, along the length direction of underground pipe gallery, underground pipe gallery contains multiple guard zone, electric cabin nitrogen
Gas conveying branches pipeline connects one to one with the electric cabin in the guard zone, combustion gas cabin nitrogen conveying branches pipeline with it is described
Combustion gas cabin in guard zone connects one to one.
The nitrogen gas control valve door is set on electric cabin nitrogen conveying branches pipeline and combustion gas cabin nitrogen conveying branches pipeline,
The nitrogen gas control valve door contains shut-off valve and pneumatic cut-off valve, shut-off valve and pneumatic cut-off valve, and shut-off valve is normally open, gas
Dynamic stop valve is normally off.
The Urban Underground pipe gallery system for carrying out safeguard protection using nitrogen further includes control unit and the first inspection
Survey unit, which is set in electric cabin, and pneumatic cut-off valve is connect with the control unit, the first detection unit and
Control unit connection, when the first detection unit, which detects, has fire behavior in electric cabin, which gives after delay 30 seconds
Pneumatic cut-off valve on electric cabin nitrogen conveying branches pipeline issues open signal, pneumatically cutting on electric cabin nitrogen conveying branches pipeline
Disconnected valve will be opened and electric cabin nitrogen conveying branches pipeline made to spurt nitrogen 60 seconds.
The Urban Underground pipe gallery system for carrying out safeguard protection using nitrogen further includes control unit and the second inspection
Unit is surveyed, which is set in combustion gas cabin, and pneumatic cut-off valve is connect with the control unit, the second detection unit
It is connect with the control unit, there is the concentration of natural gas and the natural gas to rise to when the second detection unit detects in combustion gas cabin
After the 20% of lower explosion limit value, which starts the ventilation blower in combustion gas cabin；When the second detection unit detects combustion gas
After having the concentration of natural gas and the natural gas to rise to the 80% of lower explosion limit value in cabin, the control unit is defeated to combustion gas cabin nitrogen
The pneumatic cut-off valve on lateral is sent to issue open signal, the pneumatic cut-off valve on the nitrogen conveying branches pipeline of combustion gas cabin will be opened
It opens and combustion gas cabin nitrogen conveying branches pipeline is made persistently to spurt nitrogen.
The beneficial effects of the utility model are:
1, has the characteristics that cleaning, environmentally friendly, safe and efficient, five economic, better than currently used chemical agent fire extinguishing side
Formula；
2, gas explosion in combustion gas cabin can be effectively suppressed, filled up the blank of combustion gas cabin explosion-suppressing method.
3, nitrogen is applied in Urban Underground pipe gallery safeguard protection, nitrogen can put out a fire but also datonation-inhibition, have double
Weight function.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide a further understanding of the present invention, this is practical
Novel illustrative embodiments and their description are not constituteed improper limits to the present invention for explaining the utility model.
Fig. 1 is the vertical view knot of the Urban Underground pipe gallery system described in the utility model that safeguard protection is carried out using nitrogen
Structure schematic diagram.
Fig. 2 is the section knot of the Urban Underground pipe gallery system described in the utility model that safeguard protection is carried out using nitrogen
Structure schematic diagram.
Fig. 3 is influence schematic diagram of the nitrogen to methane explosion limit.
10, nitrogen feeder；20, nitrogen gas delivery-line；30, underground pipe gallery；
11, storage cylinder air supply system；12, nitrogen making machine group air supply system；13, liquid nitrogen storage tank air supply system；
21, nitrogen conveys main pipeline；22, electric cabin nitrogen conveying branches pipeline；23, combustion gas cabin nitrogen conveying branches pipeline；
24, pneumatic cut-off valve；25, shut-off valve；
31, electric cabin；32, combustion gas cabin.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The utility model will be described in detail below with reference to the accompanying drawings and embodiments.
A kind of Urban Underground pipe gallery system carrying out safeguard protection using nitrogen, including sequentially connected nitrogen gas supply
Device 10, nitrogen gas delivery-line 20 and underground pipe gallery 30, nitrogen gas delivery-line 20 are equipped with nitrogen gas control valve door, and nitrogen is defeated
Send pipeline 20 that the nitrogen in nitrogen feeder 10 can be delivered in underground pipe gallery 30, as depicted in figs. 1 and 2.
In the present embodiment, underground pipe gallery 30 contains electric cabin 31 and combustion gas cabin 32, is equipped with cable, combustion gas in electric cabin 31
Gas pipeline is equipped in cabin 32, nitrogen gas delivery-line 20 is connect with electric cabin 31 and combustion gas cabin 32, and nitrogen gas delivery-line 20 can incite somebody to action
Nitrogen in nitrogen feeder 10 is delivered in the electric cabin 31 and combustion gas cabin 32 of underground pipe gallery 30, to realize fire extinguishing and suppression
Quick-fried function.
In the present embodiment, nitrogen feeder 10 contains storage cylinder air supply system 11,12 and of nitrogen making machine group air supply system
One of liquid nitrogen storage tank air supply system 13 is a variety of.The storage cylinder air supply system 11 contains nitrogen cylinder and gas cylinder packaging
Lattice, the nitrogen cylinder are set in gas cylinder packaging lattice.The nitrogen making machine group air supply system 12 containing sequentially connected nitrogen making machine group,
Supercharger and nitrogen air accumulator.The liquid nitrogen storage tank air supply system 13 contains sequentially connected liquid nitrogen storage tank, liquid nitrogen pump, air temperature type
Gasifier and nitrogen air accumulator.
In the present embodiment, nitrogen gas delivery-line 20 is defeated containing sequentially connected nitrogen conveying main pipeline 21, electric cabin nitrogen
Lateral 22 and combustion gas cabin nitrogen conveying branches pipeline 23 are sent, it is upper in the length direction of underground pipe gallery 30, i.e. Fig. 1
Lower direction, underground pipe gallery 30 contain multiple guard zone, electric cabin nitrogen conveying branches pipeline 22 in the guard zone
Electric cabin 31 connect one to one, the combustion gas cabin 32 1 in combustion gas cabin nitrogen conveying branches pipeline 23 and the guard zone is a pair of
It should connect.
In the present embodiment, the nitrogen gas control valve door is set to electric cabin nitrogen conveying branches pipeline 22 and combustion gas cabin nitrogen
On conveying branches pipeline 23, the nitrogen gas control valve door contains shut-off valve 25 and pneumatic cut-off valve 24, shut-off valve 25 and pneumatically cuts
Disconnected valve 24, shut-off valve 25 are normally open, and pneumatic cut-off valve 24 is normally off.
Nitrogen extinguishing performance and advantage explanation:
The extinguishing property of fire extinguishing nitrogen system depends primarily on the inertia of pure nitrogen gas.With the process of flooding of pure nitrogen gas, protect
Oxygen in shield gas is constantly reduced.The oxygen supply of flame is cut off, so as to cause the reduction of combustion rate and flame base temperature.
When temperature drops to 500 DEG C or less, flame is extinguished.When the concentration of oxygen in air drops to 15% or less, burning will not
It can continue.Fire extinguishing nitrogen system is exactly that the oxygen concentration in air is dropped to 12.5% or so to put out a fire.Oxygen concentration
12.5% is equivalent to people breathes in the place of height above sea level 5000m, verified, if place is no more than 60 at the time in this environment
It is not dysgenic to human body if minute.The ratio in oxygen duty gas is 21% under normal circumstances, and nitrogen is
78%, it is other to account for 1%.After nitrogen system release, oxygen accounting is about 12.5%, nitrogen accounting about 86.5%, other to account for 1%.
Under this proportionate relationship, the density of nitrogen and the density of air are about the same, therefore nitrogen can be uniformly trapped in after fire extinguishing
Fire extinguishing region, thus good extinguishing effect, simultaneously as separation will not be generated using one pack system extinguishing chemical, to keep long enough
Fire extinguishing dip time.Nitrogen comes from air, implements to return in atmosphere again after fire extinguishing is spurted, has no effect to environment, be clear
Clean environmental protection, energy saving excellent extinguishing chemical.It refers specifically to indicate: nitrogen is 0 to ozone layer depletion latent energy value (ODP), is generated
The chamber effect potential value (GWP) of the earth is similarly 0.Nitrogen is as extinguishing chemical, and not composite, can directly mention from air
It takes out, it is very low to fill cost, and without chemical reagent residue that may be present in synthetic gas, securely and reliably.To current
Until, extinguishing property most preferably CO2, followed by nitrogen.But CO2Itself has toxicity, CO2When concentration reaches 3%, i.e., to people
Body has slight headache to influence, and people must come out when reaching 5%, can make one to lose will rapidly when reaching 10%, reach 30%
When can make one dead in a few seconds.And nitrogen does not have toxicity, as long as rationally controlling extinguishing concentration, safety is very high.Separately
Outer nitrogen system will not generate mist upon discharge, and CO2The fire that high temperature is encountered after rapidly spurting can generate white haze and stop interior
The sight of personnel escape slows down the speed that office work personnel escape from the fire scene in time, greatly reduces the safety of personnel.
In short, nitrogen is put out a fire for Urban Underground pipe gallery to be had the advantages that clean, is environmentally friendly, safe and efficient, five economical, has and change
Learn the advantage that synthesis extinguishing chemical and carbon dioxide extinguishing agent do not have.
Underground pipe gallery electricity cabin fire extinguishing system nitrogen use level calculates:
Nitrogen extinguishing calculating is now carried out by taking the Urban Underground piping lane of somewhere as an example.Calculation formula is " lazy from CECS312-2012
Property Gas fire extinguishing systems technology regulation " in the design of the 3rd chapter system and DB13 (J)-T143-2012 " storage pot type fire extinguishing nitrogen system
Technical regulation " design of the 4th chapter system.Nitrogen extinguishing agent dosage calculation formula in the two regulations is identical.The ground
Road underground pipe gallery electricity cabin is divided into 4 fire compartments.Underground pipe gallery electricity cabin fire extinguishing nitrogen system is designed according to combined distribution system,
One combined distribution system at most can protect 8 guard plots.Combination distribution fire extinguishing system nitrogen reserves are maximum according to volume
The reserves of one fire compartment determine.The maximum fire compartment volume of volume is 1656m in 4 fire compartments3(180m
×2.3m×4m).Electric cabin minimal design extinguishing concentration takes 41.5%, and calculating nitrogen extinguishing agent dosage is 1186Kg, converts into mark
Nitrogen volume is 948Nm under quasi- situation3。
Several nitrogen storage modes of fire extinguishing nitrogen system compare:
1, steel cylinder group gas storage air supply system
One 40 liters of nitrogen cylinder gas-storing capacity is 6Nm3(nitrogen pressure is 15MPa in nitrogen cylinder), needs 40 liters of nitrogen altogether
Totally 158 bottles of steel cylinder.Nitrogen storage uses the pattern of gas cylinder packaging lattice.Each nitrogen cylinder packaging lattice store 20 steel cylinders, set 8 altogether
Group nitrogen cylinder packaging lattice, close neighbour's arrangement, nitrogen cylinder are 160 total.The upper surface of gas cylinder packaging lattice group sets a rain-proof shelter, and four
Set a circle steel-work fence week, fence sets double door on one side.Nitrogen in 8 groups of nitrogen cylinder packaging lattice is decompressed to by pressure reducer
A DN150 nitrogen main pipeline is accessed after about 0.8MPa.See Table 1 for details for the estimation of steel cylinder group gas storage air supply system equipment price.
1 steel cylinder group gas storage air supply system equipment price of table estimates table
| System capital equipment | Equipment price, Wan Yuan | |
| 1 | Nitrogen cylinder | 6.4 |
| 2 | Nitrogen cylinder packaging lattice | 2.4 |
| It is total | 8.8 |
Fill 40 liters of nitrogen cylinder (gas-storing capacity 6Nm3) expense be 15 yuan, 160 bottles fill totally 2400 yuan of expense.
2, nitrogen making machine group air supply system
Nitrogen making machine group mode air supply system is made of nitrogen making machine group, supercharger, nitrogen air accumulator, using making nitrogen by pressure swing adsorption
Mode, the nitrogen pressure that pressure-swing absorption apparatus is sent out is about 0.6MPa, enters nitrogen after being forced into 3.0MPa using supercharger
Air accumulator, air accumulator water capacity are 50m3, using vertical tank or horizontal tank.(vertical tank occupied area is small, but the higher possibility of height
Will affect urban, horizontal tank occupied area is larger) select a set of nitrogen ability processed for 100Nm3The small-sized pressure-variable adsorption system of/h
Nitrogen unit, unit continuous operation 10 hours can be by 50m3Nitrogen gas tank is full of gas, and nitrogen making machine group and supercharger are shut down later.Nitrogen
Tank outlet conduit is equipped with self-operated type nitrogen pressure regulator valve, guarantees that nitrogen pressure is stablized in 0.8MPa after pressure regulator valve when nitrogen uses.
Usually nitrogen making machine group is in shutdown status, and the nitrogen only into nitrogen gas tank exhausts rear nitrogen making machine group and reworks again.For
Nitrogen making machine group and supercharger are protected, is prolonged its service life, is needed nitrogen making machine group and supercharger arrangement indoors, it is therefore desirable to
Build a closed room.Nitrogen air accumulator outdoor can be arranged.The estimation of nitrogen making machine group air supply system equipment price is detailed in table
2。
2 nitrogen making machine group air supply system equipment price of table estimates table
| System capital equipment | Equipment price, Wan Yuan | |
| 1 | Nitrogen making machine group | 15 |
| 2 | Supercharger | 15 |
| 3 | Nitrogen air accumulator | 20 |
| It is total | 50 |
The unstripped gas of making nitrogen by pressure swing adsorption is air, and unstripped gas expense is zero.
3, liquid nitrogen storage tank air supply system
Liquid nitrogen storage tank air supply system is made of liquid nitrogen storage tank, liquid nitrogen pump, air-heating type gasifier and nitrogen air accumulator.Select one
A volume 2m3Liquid nitrogen storage tank, can produce about 1000Nm after the liquid nitrogen gasification in storage tank3Nitrogen.Liquid nitrogen adds by liquid nitrogen pump
It is depressed into after 3.0MPa and enters air-heating type gasifier, liquid nitrogen gasification is that enter water capacity after nitrogen be 50m3Nitrogen air accumulator storage
It deposits.Nitrogen gas tank outlet conduit is equipped with self-operated type nitrogen pressure regulator valve, guarantees that nitrogen pressure is stablized after pressure regulator valve when nitrogen uses
0.8MPa.Usually liquid nitrogen air pump inoperative is added after the nitrogen in nitrogen gas tank exhausts, then through tank car into liquid nitrogen storage tank
Liquid nitrogen, liquid nitrogen pump is reworked again later, the gas storage into nitrogen gas tank.To prevent the liquid nitrogen natural evaporation in liquid nitrogen storage tank, when
In nitrogen gas tank when Chu Manqi, liquid nitrogen storage tank can be empty.Liquid nitrogen storage tank, liquid nitrogen pump, air-heating type gasifier and nitrogen air accumulator
It outdoor can arrange, not need between building.See Table 3 for details for the estimation of liquid nitrogen storage tank air supply system equipment price.
3 liquid nitrogen storage tank air supply system equipment price of table estimates table
| System capital equipment | Equipment price, Wan Yuan | |
| 1 | Liquid nitrogen storage tank | 2 |
| 2 | Liquid nitrogen pump | 2 |
| 3 | Air-heating type gasifier | 3 |
| 4 | Nitrogen air accumulator | 20 |
| It is total | 27 |
Fill 2m3About 1200 yuan of liquid nitrogen expense.
4, fire extinguishing nitrogen system conveys and spurts control process explanation:
Pass through a DN150 main pipeline by the nitrogen of three of the above mode output to access in underground pipe gallery electricity cabin,
A nitrogen lateral is picked out in each guard plot from nitrogen main pipeline, lateral starting point sets a shut-off valve and one
A pneumatic cut-off valve.Shut-off valve is usually normally open, and pneumatic cut-off valve is normally closed.Fire alarm system in some electric cabin
It detects and issues fire extinguishing command signal after fire behavior to fire extinguishing control panel, after delay 30 seconds, fire extinguishing control panel sending is spurted signal and beaten
Pneumatic cut-off valve is opened, pneumatic cut-off valve opening spurts nitrogen extinguishing, and nitrogen blowdown time is 60 seconds.
Three kinds of air supply systems of fire extinguishing nitrogen system compare:
Three kinds of nitrogen air supply systems compare that see Table 4 for details.
4 three kinds of nitrogen air supply systems of table compare
Fire-fighting mode compares:
Underground pipe gallery electricity cabin mainly uses two kinds of self-extinguishing modes of hot aerosol and ultra-fine dry powder at present, does not use also
Nitrogen and carbon-dioxide fire engine mode, now compare the investment of four kinds of fire-fighting modes, see Table 5 for details.
5 three kinds of fire-fighting mode comparison sheets of table
From upper table compare as can be seen that fire extinguishing nitrogen system investment it is low, and be one-time investment, do not need replacement medicament.
Once fire behavior occurs, it is also very low that nitrogen expense is filled again.
Nitrogen explosion suppression system explanation:
It is datonation-inhibition to can be also used for natural gas cabin other than it can be used for electric cabin fire extinguishing for nitrogen.
Nitrogen datonation-inhibition function explanation and datonation-inhibition nitrogen use level calculate:
After natural gas leaking occurs in underground pipe gallery natural gas cabin, only relying on ventilation blower ventilation can not be by cabin
Once interior natural Gas content is controlled in lower explosion limit hereinafter, the natural Gas content in cabin is higher than lower explosion limit, just there is generation
A possibility that explosion, consequence are very serious.Therefore, relying solely on ventilating system can not be datonation-inhibition, and the nitrogen as inert gas
With datonation-inhibition function.
Methane content accounts for 90% or more in natural gas.The aerial lower explosion limit of methane is 5%, and upper explosion limit is
15%.And there is very big influence to the blast characteristics of methane air system as nitrogen content of inert gas.With mixed
Nitrogen component in gas to be closed to increase, upper explosion limit is decreased obviously, and lower explosion limit slowly rises, and explosion limit range obviously narrows,
Risk of explosion significantly reduces.After nitrogen content increases to certain value, upper explosion limit and lower explosion limit will intersect at a point.This
The content of nitrogen is continued growing afterwards, then no matter how methane volumetric score changes and will not all explode in mixed gas.Therefore
As long as underground pipe gallery is natural after injecting the minimum inerting concentration that enough nitrogen reaches nitrogen inhibition methane explosion into air
The internal leakage of gas cabin, which enters natural gases more again, to explode, as shown in Figure 3.
Datonation-inhibition nitrogen use level calculates:
According to the regulation in " storage pot type fire extinguishing nitrogen system technical regulation ", nitrogen inhibits the minimum inerting of methane explosion dense
Degree is 47.3%.The maximum fire compartment volume of volume is 1296m in the cabin fire compartment of above-mentioned somewhere natural gas3(180m
×1.8m×4m).It calculates and inhibits the nitrogen use level of gas explosion for 1109Kg, nitrogen volume is under the equivalent status of criterion
887Nm3.Can be datonation-inhibition since nitrogen can not only put out a fire, by fire extinguishing nitrogen system and datonation-inhibition it can use nitrogen system
It is combined into one, only builds a set of nitrogen air supply system, nitrogen gas-storing capacity takes the larger value of the two, and nitrogen is used when fire occurs for electric cabin
In fire extinguishing, when natural gas leaking occurs for natural gas cabin, nitrogen is for inhibiting gas explosion.
Fire extinguishing nitrogen system conveys and spurts control process explanation:
The nitrogen that gas storage system gives off is accessed in underground pipe gallery natural gas cabin by a main pipeline, in each natural gas
A nitrogen lateral is picked out from nitrogen main pipeline in the fire compartment of cabin, lateral starting point sets a shut-off valve and one
A pneumatic cut-off valve.Shut-off valve is usually normally open, and pneumatic cut-off valve is normally closed.When in some fire compartment of natural gas cabin
Combustible gas detecting system issues alarm signal after having detected natural gas, when concentration of natural gas rises to its lower explosion limit value
Start ventilation blower in natural gas cabin after the 20% of (volume fraction) and be aerated ventilation, when concentration of natural gas rises under its explosion
Stop ventilation blower after the 80% of limit value (volume fraction), control system sending later is spurted in signal opening natural gas cabin fire compartment
Pneumatic cut-off valve, spurt nitrogen into natural gas cabin.
The above, only specific embodiment of the utility model cannot limit the range that utility model is implemented, institute with it
With the displacement of its equivalent assemblies, or according to equivalent variations made by the utility model patent protection scope and modification, should all still fall within
The scope that this patent is covered.In addition, between technical characteristic and technical characteristic in the utility model, technical characteristic and technical application
Between novel, technical application it is novel it is novel with technical application between use can be freely combined.
Claims (8)
1. a kind of Urban Underground pipe gallery system for carrying out safeguard protection using nitrogen, which is characterized in that described to use nitrogen
The Urban Underground pipe gallery system for carrying out safeguard protection includes sequentially connected nitrogen feeder (10), nitrogen gas delivery-line
(20) and underground pipe gallery (30), nitrogen gas delivery-line (20) are equipped with nitrogen gas control valve door, nitrogen gas delivery-line (20) energy
It is enough that nitrogen in nitrogen feeder (10) is delivered in underground pipe gallery (30).
2. the Urban Underground pipe gallery system according to claim 1 for being carried out safeguard protection using nitrogen, feature are existed
In underground pipe gallery (30) contains electric cabin (31) and combustion gas cabin (32), nitrogen gas delivery-line (20) and electric cabin (31) and combustion gas
Nitrogen in nitrogen feeder (10) can be delivered to underground pipe gallery by cabin (32) connection, nitrogen gas delivery-line (20)
(30) in electric cabin (31) and combustion gas cabin (32).
3. the Urban Underground pipe gallery system according to claim 2 for being carried out safeguard protection using nitrogen, feature are existed
In nitrogen feeder (10) contains storage cylinder air supply system (11), nitrogen making machine group air supply system (12) and liquid nitrogen storage tank gas supply
One of system (13) is a variety of.
4. the Urban Underground pipe gallery system according to claim 3 for being carried out safeguard protection using nitrogen, feature are existed
In the storage cylinder air supply system (11) contains nitrogen cylinder and gas cylinder packaging lattice, which is set to gas cylinder packaging lattice
It is interior.
5. the Urban Underground pipe gallery system according to claim 3 for being carried out safeguard protection using nitrogen, feature are existed
In the nitrogen making machine group air supply system (12) contains sequentially connected nitrogen making machine group, supercharger and nitrogen air accumulator.
6. the Urban Underground pipe gallery system according to claim 3 for being carried out safeguard protection using nitrogen, feature are existed
In the liquid nitrogen storage tank air supply system (13) contains sequentially connected liquid nitrogen storage tank, liquid nitrogen pump, air-heating type gasifier and nitrogen storage
Gas tank.
7. the Urban Underground pipe gallery system according to claim 2 for being carried out safeguard protection using nitrogen, feature are existed
In nitrogen gas delivery-line (20) contains sequentially connected nitrogen conveying main pipeline (21), electric cabin nitrogen conveying branches pipeline (22)
With combustion gas cabin nitrogen conveying branches pipeline (23), length direction along underground pipe gallery (30), underground pipe gallery (30) contains
There are multiple guard zone, the electric cabin (31) in electric cabin nitrogen conveying branches pipeline (22) and the guard zone, which corresponds, to be connected
It connects, combustion gas cabin nitrogen conveying branches pipeline (23) connects one to one with the combustion gas cabin (32) in the guard zone.
8. the Urban Underground pipe gallery system according to claim 7 for being carried out safeguard protection using nitrogen, feature are existed
In the nitrogen gas control valve door is set to electric cabin nitrogen conveying branches pipeline (22) and combustion gas cabin nitrogen conveying branches pipeline (23)
On, the nitrogen gas control valve door contains shut-off valve (25) and pneumatic cut-off valve (24), shut-off valve (25) and pneumatic cut-off valve (24),
Shut-off valve (25) is normally open, and pneumatic cut-off valve (24) is normally off.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111214784A (en) * | 2018-11-23 | 2020-06-02 | 北京京诚泽宇能源环保工程技术有限公司 | Adopt nitrogen gas to carry out safety protection's city utility tunnel system |
| CN111803826A (en) * | 2020-07-16 | 2020-10-23 | 中国矿业大学 | Movable liquid nitrogen fire extinguishing system for comprehensive pipe gallery and fire extinguishing method thereof |
-
2018
- 2018-11-23 CN CN201821938040.0U patent/CN209347970U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111214784A (en) * | 2018-11-23 | 2020-06-02 | 北京京诚泽宇能源环保工程技术有限公司 | Adopt nitrogen gas to carry out safety protection's city utility tunnel system |
| CN111803826A (en) * | 2020-07-16 | 2020-10-23 | 中国矿业大学 | Movable liquid nitrogen fire extinguishing system for comprehensive pipe gallery and fire extinguishing method thereof |
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