CN108389636A - Combustible gas explosion experiment system and method in a kind of small size pipeline - Google Patents
Combustible gas explosion experiment system and method in a kind of small size pipeline Download PDFInfo
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- CN108389636A CN108389636A CN201810114170.0A CN201810114170A CN108389636A CN 108389636 A CN108389636 A CN 108389636A CN 201810114170 A CN201810114170 A CN 201810114170A CN 108389636 A CN108389636 A CN 108389636A
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/001—Mechanical simulators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
Combustible gas explosion system and method in a kind of small size pipeline, which includes combustible gas explosion experimental section in small size pipeline；Acetylene drive section for igniting non-sensibility mixed gas；Hydrogen cylinder, nitrogen cylinder, carbon monoxide bottle, oxygen cylinder and the acetylene cylinder of imflammable gas and constituent of air are provided；Experimental section and associated pipe are evacuated to the vacuum system of vacuum state；Flammable mixed gas is stired and make muddy in experimental section to mixed uniformly mixed gas system；Mating controller switching equipment and DATA REASONING collecting device；Experiment flow is：Experimental system is evacuated to after vacuum state injects the flammable mixed gas centainly matched toward experimental section according to working condition requirement, then puts start recording data of fighting, final vacuum is completed in explosion, and experiment terminates；The present invention is high as gaseous safety is ignited using acetylene and oxygen；The gas componant of simulation is more, and the imflammable gas component in containment after major accident occurs for more real simulation nuclear reactor.
Description
Technical field
The present invention relates to the burnings of the hydrogen generated under the conditions of reactor disaster and carbon monoxide and explosion research skill
Art field, and in particular to combustible gas explosion experiment system and method in a kind of small size pipeline.
Background technology
After three miles of U.S. island nuclear accident, external many researchers begin one's study under pressurized-water reactor nuclear power plant major accident
Hydrogen generation, burning and explosion.Hydrogen explosion has occurred in Fukushima, Japan nuclear accident so that hydrogen explosion at home and abroad by
Highest attention is arrived.Nuclear reactor occurs under major accident, and hydrogen generation is generally divided into pressure vessel and pressure vessel outer two
A stage.Hydrogen generating source includes in pressure vessel：Metal (such as zirconium cladding) reacting, boron carbide at high temperature with water vapour
Simulation during oxidation process, core reflooding；The outer hydrogen generating source of pressure vessel refers mainly to height
The hydrogen that warm fusant is generated with containment underplate concrete interaction process (MCCI).These hydrogen generated in accident,
If cannot be eliminated in time, it can accumulate in containment and explode under certain condition.Explosion generates shock wave meeting
The structure for destroying containment, leads to the leakage of radioactive substance.China is the big country of nuclear power developing, and the nuclear power station in China is most
It is presurized water reactor, therefore the experiment and theoretical research of hydrogen explosion for the harm of assessment hydrogen explosion and are made under severe accident of PWR
Determine hydrogen explosion accident mitigation measure important in inhibiting.
Invention content
In order to overcome the above-mentioned problems of the prior art, the purpose of the present invention is to provide in a kind of size dimension pipeline
Combustible gas explosion experiment system and method carry out hydrogen explosion experiment in small size pipeline, obtain reactor disaster
Under the conditions of hydrogen explosion phenomenon significant data.
In order to achieve the above object, the present invention adopts the following technical scheme that：
Combustible gas explosion experiment system in a kind of small size pipeline, including experimental section 1, internal diameter and wall thickness and experimental section
1 acetylene that is identical and being connect with experimental section 1 by flange ignites section and controller switching equipment 56 and DATA REASONING and collecting device 57；
The firing tip that the acetylene ignites section is arranged there are one trepanning, to install igniting thick stick and be connected to igniting segment pipe,
And ignite arrangement one on section wall surface in acetylene and ignite section static pressure transducer 41, section static pressure transducer 41 is ignited by igniting Duan Jing
Pressure valve 39 is connected to lighting section；When needing to ignite using acetylene, acetylene is ignited section and is separated with polyester film with experimental section 1；
The experimental section 1 is horizontal fixed, and multiple high frequency dynamic pressure transducers, multiple temperature biography have been equally spaced in its both sides
Sensor, ion probe group 55 and an experimental section static pressure transducer 42, experimental section static pressure transducer 42 pass through experimental section static pressure
Valve 40 connects experimental section 1, and flammable mixed gas temperature in temperature sensor monitors experimental section 1, the measurement of ion probe group 55 can
Pressure wave arrival time when firing mixed gas generation burning or detonation, high frequency dynamic pressure transducer measure burning mixture
Pressure when pressure wave reaches when burning or detonation；1 both ends end of experimental section close to flange tube wall it is last open there are one trepanning,
To connect vacuum tube and gas pipeline, one of trepanning connects vacuum pump 2 by vacuum pump motor-driven valve 3；The flue
Road by mixing gas system connectivity experimental section 1, be disposed on the pipeline of mixed gas system pneumatic pump valve 4, first filter 5,
Circulating pump 6, the second filter 7 and import main valve 8, mixed gas system so that gas is slow in it in experimental section 1 by circulating pump
Flowing is to achieve the purpose that mixing；The flue is connected after hydrogen source pipeline, source nitrogen pipeline and source of oxygen main pipeline parallel connection
Road, be disposed on hydrogen source pipeline hydrogen pressure reducing valve 9, hydrogen diaphragm valve 10, hydrogen shut-off valve 11, hydrogen gas fire arrester 12,
Hydrogen exhaust valve 13 and hydrogen motor-driven valve 14 are simultaneously connected to hydrogen source 101, be disposed on source nitrogen pipeline nitrogen pressure reducing valve 15,
Nitrogen diaphragm valve 16, nitrogen shut-off valve 17, nitrogen air bleeding valve 18 and nitrogen motor-driven valve 19 are simultaneously connected to source nitrogen 102, oxygen source capsule
Oxygen pressure reducing valve 20, oxygen diaphragm valve 21, the first oxygen stop valve 22, oxygen flame arrester 23, oxygen row are disposed on road
Air valve 24 and oxygen motor-driven valve 25 are simultaneously connected to source of oxygen 103；Carbon monoxide source pipeline, acetylene source capsule road and source of oxygen bypass line
The igniting segment pipe that acetylene ignites section is connected, the oxidation of carbon monoxide pressure reducing valve 28, one is disposed on carbon monoxide source pipeline
Carbon diaphragm valve 29, carbon monoxide shut-off valve 30, carbon monoxide spark arrester 31 and carbon monoxide air bleeding valve 32 are simultaneously connected to carbon monoxide
Source 104 is disposed with acetylene pressure reducing valve 33, acetylene diaphragm valve 34, acetylene shut-off valve 35, acetylene spark arrester on acetylene source capsule road
36, acetylene air bleeding valve 37 and acetylene electrodynamic pump 38 and it is connected to acetylene source 105, being disposed with oxygen in source of oxygen bypass line subtracts
Pressure valve 20, oxygen diaphragm valve 21, the first oxygen stop valve 22, oxygen flame arrester 23, oxygen air bleeding valve 24 and the second oxygen are cut
Only valve 26 and third oxygen stop valve 27；It is determined by voltage divider principle and ignites gas component；When igniter energy is not enough to ignite
When flammable mixed gas, the energy released with acetylene detonation ignites flammable mixed gas in experimental section 1；It opens
Begin before experiment, 1 end of experimental section is embedded in sootiness aluminium sheet；
The controller switching equipment 56 includes sequentially connected power distribution cabinet, power transmission line and electrical equipment；The power supply of controller switching equipment 56
Source capacity meets experimental system demand, and ignition power, electronic pumping source, circulating pump and vacuum-pump power supply are provided for experimental system
With the working power of data acquisition equipment and the working power of lighting apparatus；
It includes the temperature sensor being mounted on experimental section 1, ion probe that the DATA REASONING is main with collecting device 57
The drive software of group and high frequency dynamic pressure transducer and terminal box, data collecting card, measurement module, signal conditioner, computer
And data acquisition software；Temperature sensor, ion probe and high frequency dynamic pressure transducer convert physical parameter to electric signal, pass through
Terminal box is transferred to signal conditioner and is filtered and adjust, number is converted electrical signals by measurement module and data collecting card
Signal is supplied to the drive software and data acquisition software of computer, then by the program of LabView compilings to all the sensors
Signal be processed and displayed.
The experimental section is the stainless steel tube that internal diameter is 78mm, wall thickness 12mm, length are 10m；The acetylene ignites section
Length be 0.3m.
The hydrogen source pipeline, source nitrogen pipeline, source of oxygen main pipeline, carbon monoxide source pipeline, acetylene source capsule road and oxygen
Air source bypass line is 16 millimeters of outer diameter, the stainless steel tube that 2 millimeters of wall thickness.
The experimental method of combustible gas explosion experiment system in a kind of small size pipeline,
System is vacuumized, ignition section static pressure valve 39, experimental section static pressure valve 40, pneumatic pump valve 4, hydrogen motor-driven valve are made
14, hydrogen shut-off valve 11, nitrogen motor-driven valve 19, nitrogen shut-off valve 17, oxygen motor-driven valve 25, the first oxygen stop valve 22, an oxygen
Change carbon shut-off valve 30, acetylene motor-driven valve 38, acetylene shut-off valve 35, import main valve 8, the second oxygen stop valve 26, third oxygen to cut
Only valve 27 and vacuum pump motor-driven valve 3 are in open state, remaining valve is closed, and open vacuum pump 2, ignite section static pressure
When sensor 41 and the reading of experimental section static pressure transducer 42 are 0KPa, vacuumizing phase terminates；Then nitrogen is filled with toward experimental section
Gas closes vacuum pump motor-driven valve 3, hydrogen motor-driven valve 14 and oxygen motor-driven valve 25, closes vacuum pump 2, opens hydrogen source 101 and exports
Switch, nitrogen pressure reducing valve 15 and nitrogen diaphragm valve 16 make ignition section static pressure transducer 41 and experimental section static pressure transducer 42 read
For operating mode preset pressure；Oxygen then is poured toward experimental section, nitrogen motor-driven valve 19,102 gate out switch of source nitrogen, nitrogen is closed and subtracts
Pressure valve 15, nitrogen diaphragm valve 16 and nitrogen shut-off valve 17 open 103 gate out switch of source of oxygen, oxygen pressure reducing valve 20, oxygen diaphragm
Valve 21, oxygen motor-driven valve 25, the second oxygen stop valve 26 and third oxygen stop valve 27 make experimental section static pressure transducer 42 read
For operating mode preset pressure, oxygen motor-driven valve 25 is closed, it is operating mode preset pressure to make the reading of ignition section static pressure transducer 41, closes the
Two oxygen stop valves 26 and third oxygen stop valve 27；Hydrogen then is poured toward experimental section, closes oxygen motor-driven valve 25, source of oxygen
103 gates out switch, oxygen pressure reducing valve 20, oxygen diaphragm valve 21 and the first oxygen stop valve 22 are opened the outlet of hydrogen source 101 and are opened
Pass, hydrogen pressure reducing valve 9, hydrogen diaphragm valve 10 and hydrogen motor-driven valve 14 keep the reading of experimental section static pressure transducer 42 default for operating mode
Pressure；It then begins to stir and make muddy gas, closes hydrogen motor-driven valve 14 and hydrogen diaphragm valve 10, open hydrogen exhaust valve 13, unlatching follows
Ring pump 6, makes each gas component start recording data after mixing, closes pneumatic pump valve 4, import main valve 8, ignites section static pressure
Valve 39 and experimental section static pressure valve 40, start acquisition and recording, later on ignition switch 58, after situation without exception after stop acquisition,
Record experimental data；Import main valve 8, pneumatic pump valve 4 are opened after the completion of experiment and ignite section static pressure valve 39, experimental section static pressure valve
40 are exhausted.
Compared to the prior art compared with the present invention has following advantage：
1. the present invention be directed in the pressure vessel under the conditions of PWR nuclear power plant reactor disaster and containment
Interior hydrogen explosion major accident characteristic and the experimental system invented, experimental system of the invention is using the flammable gaseous mixture such as hydrogen
Body carries out experiment, the burning under given conditions of the flammable mixed gas of research hydrogen etc. and detonation characteristics, and experimental result can be compared with
Limits are that the hydrogen explosion characteristic of engineering in practice provides theories integration.
2. the present invention is using acetylene and oxygen as ignition gas.Compared to the mode of explosive initiation, safety of the present invention
Height, low cost, experimental procedure are easy.
3. the present invention simulates air under truth using hydrogen and carbon monoxide as imflammable gas, oxygen and nitrogen
Component, nitrogen are also used as inert gas, and the concentration of each gas is calculated using partial pressure method, being capable of more truly mould
Gas component under quasi- accident conditions.
4. mixed gas system of the present invention can be stired and make muddy by experimental channel, air driven pump, gas mixing pipe road and with circulating pump
Each component gas under working condition, until it is uniformly mixed.Circulating pump has leakproofness, during guarantee is stired and make muddy in experimental section
Each component gas does not leak；Impurity that may be present will not enter in circulating pump in gas when filter ensures to stir and make muddy gas
Influence its sealing performance..
Description of the drawings
Fig. 1 is combustible gas explosion experiment system schematic diagram in a kind of small size pipeline of the present invention.
Fig. 2 is combustible gas explosion experiment system controller switching equipment schematic diagram in a kind of small size pipeline of the present invention.
Fig. 3 is that combustible gas explosion experiment system DATA REASONING shows with collecting device in a kind of small size pipeline of the present invention
It is intended to.
Specific implementation mode
The present invention is described in detail with reference to the accompanying drawings and detailed description：
As shown in Figure 1, the present invention is that combustible gas explosion experiment system includes experimental section 1 in a kind of small size pipeline,
Internal diameter and wall thickness is identical as experimental section 1 and the acetylene that is connect with experimental section 1 by flange ignites section and 56 sum number of controller switching equipment
According to measurement and collecting device 57；The firing tip that the acetylene ignites section is arranged there are one trepanning, to install igniting thick stick and be connected to
Igniting segment pipe, and ignite arrangement one on section wall surface in acetylene and ignite section static pressure transducer 41, ignite section static pressure transducer 41
It is connected to lighting section by igniting section static pressure valve 39；When needing to ignite using acetylene, acetylene ignites section and uses polyester with experimental section 1
Film separates；The experimental section 1 is horizontal fixed, and multiple high frequency dynamic pressure transducers, multiple temperature biography have been equally spaced in its both sides
Sensor, ion probe group 55 and an experimental section static pressure transducer 42, experimental section static pressure transducer 42 pass through experimental section static pressure
Valve 40 connects experimental section 1, and flammable mixed gas temperature in temperature sensor monitors experimental section 1, the measurement of ion probe group 55 can
Pressure wave arrival time when firing mixed gas generation burning or detonation, high frequency dynamic pressure transducer measure burning mixture
Pressure when pressure wave reaches when burning or detonation；1 both ends end of experimental section close to flange tube wall it is last open there are one trepanning,
To connect vacuum tube and gas pipeline, one of trepanning connects vacuum pump 2 by vacuum pump motor-driven valve 3；The flue
Road by mixing gas system connectivity experimental section 1, be disposed on the pipeline of mixed gas system pneumatic pump valve 4, first filter 5,
Circulating pump 6, the second filter 7 and import main valve 8, mixed gas system so that gas is slow in it in experimental section 1 by circulating pump
Flowing is to achieve the purpose that mixing；The flue is connected after hydrogen source pipeline, source nitrogen pipeline and source of oxygen main pipeline parallel connection
Road, be disposed on hydrogen source pipeline hydrogen pressure reducing valve 9, hydrogen diaphragm valve 10, hydrogen shut-off valve 11, hydrogen gas fire arrester 12,
Hydrogen exhaust valve 13 and hydrogen motor-driven valve 14 are simultaneously connected to hydrogen source 101, be disposed on source nitrogen pipeline nitrogen pressure reducing valve 15,
Nitrogen diaphragm valve 16, nitrogen shut-off valve 17, nitrogen air bleeding valve 18 and nitrogen motor-driven valve 19 are simultaneously connected to source nitrogen 102, oxygen source capsule
Oxygen pressure reducing valve 20, oxygen diaphragm valve 21, the first oxygen stop valve 22, oxygen flame arrester 23, oxygen row are disposed on road
Air valve 24 and oxygen motor-driven valve 25 are simultaneously connected to source of oxygen 103；Carbon monoxide source pipeline, acetylene source capsule road and source of oxygen bypass line
The igniting segment pipe that acetylene ignites section is connected, when imflammable gas is carbon monoxide in experiment, design conditions are direct
Ignition and detonation is ignited without pilot gas, ignition section and experimental section holding communicating state before and after testing, therefore carbon monoxide gas
Body source capsule road is designed as being attached from ignition section.Carbon monoxide pressure reducing valve 28, one is disposed on carbon monoxide source pipeline
Carbonoxide diaphragm valve 29, carbon monoxide shut-off valve 30, carbon monoxide spark arrester 31 and carbon monoxide air bleeding valve 32 are simultaneously connected to an oxygen
Change carbon source 104, acetylene pressure reducing valve 33, acetylene diaphragm valve 34, acetylene shut-off valve 35, acetylene resistance are disposed on acetylene source capsule road
Firearm 36, acetylene air bleeding valve 37 and acetylene electrodynamic pump 38 are simultaneously connected to acetylene source 105, are set gradually in source of oxygen bypass line aerobic
Gas pressure reducing valve 20, oxygen diaphragm valve 21, the first oxygen stop valve 22, oxygen flame arrester 23, oxygen air bleeding valve 24 and the second oxygen
Gas shut-off valve 26 and third oxygen stop valve 27；It is determined by voltage divider principle and ignites gas component；When igniter energy is not enough to
When igniting flammable mixed gas, the energy released with acetylene detonation draws flammable mixed gas in experimental section 1
It is quick-fried；Before starting experiment, 1 end of experimental section is embedded in sootiness aluminium sheet；
As the preferred embodiment of the present invention, the experimental section be internal diameter be 78mm, wall thickness 12mm, length 10m
Stainless steel tube；The length that the acetylene ignites section is 0.3m.
As the preferred embodiment of the present invention, the hydrogen source pipeline, source nitrogen pipeline, source of oxygen main pipeline, an oxygen
It is 16 millimeters of outer diameter, the stainless steel tube that 2 millimeters of wall thickness to change carbon source pipeline, acetylene source capsule road and source of oxygen bypass line.
As the preferred embodiment of the present invention, ignition system is the GDQ-30 type high energy that Zheng Yu equipment Co., Ltd provides
Igniter 58.
As shown in Fig. 2, as the preferred embodiment of the present invention, the controller switching equipment 56 includes mainly sequentially connected matches
Electric cabinet, power transmission line and electrical equipment.The power supply source capacity of controller switching equipment meets experimental system demand, and igniting is provided for experimental system
The work electricity of device power supply, motor-driven valve power supply, circulating pump and vacuum-pump power supply and the working power of data acquisition equipment, lighting apparatus
Source etc..
As shown in figure 3, the DATA REASONING includes mainly thermocouple, ion probe and pressure sensing with collecting device 57
The drive software and data acquisition software of device, terminal box, capture card, measurement module, signal conditioner, computer.Thermocouple, from
Sub- probe and pressure sensor convert physical parameter to electric signal, by terminal box, are transferred to signal conditioner and are filtered
It adjusts, digital signal is converted electrical signals by measurement module and data collecting card, be supplied to the drive software sum number of computer
According to acquisition software, the signal of all the sensors is processed and displayed in the program then compiled by LabView.
Combustible gas explosion experimental method in a kind of small size pipeline of the present invention, specific experimental implementation flow are as follows：
System is vacuumized, ignition section static pressure valve 39, experimental section static pressure valve 40, pneumatic pump valve 4, hydrogen motor-driven valve are made
14, hydrogen shut-off valve 11, nitrogen motor-driven valve 19, nitrogen shut-off valve 17, oxygen motor-driven valve 25, the first oxygen stop valve 22, an oxygen
Change carbon motor-driven valve, carbon monoxide shut-off valve 30, acetylene motor-driven valve 38, acetylene shut-off valve 35, import main valve 8, the cut-off of the second oxygen
Valve 26, third oxygen stop valve 27 and vacuum pump motor-driven valve 3 are in open state, remaining valve is closed, and open true
Sky pump 2, ignites section static pressure transducer 41 and experimental section static pressure transducer 42 is read when being 0KPa, and vacuumizing phase terminates；With
It is filled with nitrogen toward experimental section afterwards, closes vacuum pump motor-driven valve 3, hydrogen motor-driven valve 14 and oxygen motor-driven valve 25, closes vacuum pump 2,
101 gate out switch of hydrogen source, nitrogen pressure reducing valve 15 and nitrogen diaphragm valve 16 are opened, ignition section static pressure transducer 41 and experimental section are made
The reading of static pressure transducer 42 is operating mode preset pressure；Oxygen then is poured toward experimental section, closes nitrogen motor-driven valve 19, source nitrogen
102 gates out switch, nitrogen pressure reducing valve 15, nitrogen diaphragm valve 16 and nitrogen shut-off valve 17 open 103 gate out switch of source of oxygen, oxygen
Gas pressure reducing valve 20, oxygen diaphragm valve 21, oxygen motor-driven valve 25, the second oxygen stop valve 26 and third oxygen stop valve 27, make reality
It is operating mode preset pressure to test the reading of section static pressure transducer 42, closes oxygen motor-driven valve 25, and ignition section static pressure transducer 41 is made to read
For operating mode preset pressure, the second oxygen stop valve 26 and third oxygen stop valve 27 are closed；Hydrogen then is poured toward experimental section, is closed
Close oxygen motor-driven valve 25,103 gate out switch of source of oxygen, oxygen pressure reducing valve 20, oxygen diaphragm valve 21 and the first oxygen stop valve 22,
101 gate out switch hydrogen pressure reducing valve 9 of hydrogen source, hydrogen diaphragm valve 10 and hydrogen motor-driven valve 14 are opened, experimental section static pressure is made to sense
The reading of device 42 is operating mode preset pressure；It then begins to stir and make muddy gas, closes hydrogen motor-driven valve 14 and hydrogen diaphragm valve 10, open hydrogen
Gas air bleeding valve 13, open the circulation pump 6 make each gas component start recording data after mixing, close pneumatic pump valve 4, into
Mouth main valve 8 ignites section static pressure valve 39 and experimental section static pressure valve 40, starts acquisition and recording, later on ignition switch 58 is without exception
Stop acquisition after after situation, records experimental data；Import main valve 8, pneumatic pump valve 4 and ignition section static pressure are opened after the completion of experiment
Valve 39, experimental section static pressure valve 40 are exhausted.
Claims (4)
1. combustible gas explosion experiment system in a kind of small size pipeline, it is characterised in that：Including experimental section (1), internal diameter and
Wall thickness is identical as experimental section (1) and ignites section and controller switching equipment (56) sum number by the acetylene that flange is connect with experimental section (1)
According to measurement and collecting device (57)；
The firing tip that the acetylene ignites section is arranged there are one trepanning, to install igniting thick stick and be connected to igniting segment pipe, and
Acetylene ignites arrangement one on section wall surface and ignites section static pressure transducer (41), ignites section static pressure transducer (41) by igniting Duan Jing
Pressure valve (39) is connected to lighting section；When needing to ignite using acetylene, acetylene is ignited section and is separated with polyester film with experimental section (1)；
The experimental section (1) is horizontal fixed, and multiple high frequency dynamic pressure transducers, multiple temperature sensing have been equally spaced in its both sides
Device, ion probe group (55) and an experimental section static pressure transducer (42), experimental section static pressure transducer (42) pass through experimental section
Static pressure valve (40) connects experimental section (1), flammable mixed gas temperature, ion probe in temperature sensor monitors experimental section (1)
Group (55) measures burning mixture and pressure wave arrival time when burning or detonation occurs, and high frequency dynamic pressure transducer measures flammable
Pressure when pressure wave reaches when burning or detonation occurs for mixed gas；Experimental section (1) both ends end is on the tube wall of flange
A to open there are one trepanning, to connect vacuum tube and gas pipeline, one of trepanning is connected true by vacuum pump motor-driven valve (3)
Sky pump (2)；The gas pipeline is disposed with pneumatic by mixing gas system connectivity experimental section (1) on the pipeline of mixed gas system
Pump valve (4), first filter (5), circulating pump (6), the second filter (7) and import main valve (8), mixed gas system pass through cycle
Pump is so that experimental section (1) interior gas is slowly flowed to achieve the purpose that mixing in it；Hydrogen source pipeline, source nitrogen pipeline and oxygen
The gas pipeline is connected after air source main pipeline parallel connection, and hydrogen pressure reducing valve (9), hydrogen diaphragm are disposed on hydrogen source pipeline
Valve (10), hydrogen shut-off valve (11), hydrogen gas fire arrester (12), hydrogen exhaust valve (13) and hydrogen motor-driven valve (14) are simultaneously connected to hydrogen
Source (101) is disposed with nitrogen pressure reducing valve (15), nitrogen diaphragm valve (16), nitrogen shut-off valve (17), nitrogen on source nitrogen pipeline
Gas air bleeding valve (18) and nitrogen motor-driven valve (19) are simultaneously connected to source nitrogen (102), and oxygen decompression is disposed on source of oxygen pipeline
Valve (20), oxygen diaphragm valve (21), the first oxygen stop valve (22), oxygen flame arrester (23), oxygen air bleeding valve (24) and oxygen
Motor-driven valve (25) is simultaneously connected to source of oxygen (103)；Carbon monoxide source pipeline, acetylene source capsule road connect acetylene with source of oxygen bypass line
The igniting segment pipe of section is ignited, carbon monoxide pressure reducing valve (28), carbon monoxide diaphragm are disposed on carbon monoxide source pipeline
Valve (29), carbon monoxide shut-off valve (30), carbon monoxide spark arrester (31) and carbon monoxide air bleeding valve (32) are simultaneously connected to an oxidation
Carbon source (104), be disposed on acetylene source capsule road acetylene pressure reducing valve (33), acetylene diaphragm valve (34), acetylene shut-off valve (35),
Acetylene spark arrester (36), acetylene air bleeding valve (37) and acetylene electrodynamic pump (38) are simultaneously connected to acetylene source (105), source of oxygen bypass line
On be disposed with oxygen pressure reducing valve (20), oxygen diaphragm valve (21), the first oxygen stop valve (22), oxygen flame arrester (23),
Oxygen air bleeding valve (24) and the second oxygen stop valve (26) and third oxygen stop valve (27)；It is determined and is ignited by voltage divider principle
Gas component；When igniter energy is not enough to ignite flammable mixed gas, the energy released with acetylene detonation is to reality
Flammable mixed gas in section (1) is tested to be ignited；Before starting experiment, experimental section (1) end is embedded in sootiness aluminium sheet；
The controller switching equipment (56) includes sequentially connected power distribution cabinet, power transmission line and electrical equipment；The power supply of controller switching equipment (56)
Source capacity meets experimental system demand, and ignition power, electronic pumping source, circulating pump and vacuum-pump power supply are provided for experimental system
With the working power of data acquisition equipment and the working power of lighting apparatus；
It includes the temperature sensor being mounted on experimental section (1), ion probe that the DATA REASONING is main with collecting device (57)
The drive software of group and high frequency dynamic pressure transducer and terminal box, data collecting card, measurement module, signal conditioner, computer
And data acquisition software；Temperature sensor, ion probe and high frequency dynamic pressure transducer convert physical parameter to electric signal, pass through
Terminal box is transferred to signal conditioner and is filtered and adjust, number is converted electrical signals by measurement module and data collecting card
Signal is supplied to the drive software and data acquisition software of computer, then by the program of LabView compilings to all the sensors
Signal be processed and displayed.
2. combustible gas explosion experiment system in a kind of small size pipeline according to claim 1, it is characterised in that：Institute
It is the stainless steel tube that internal diameter is 78mm, wall thickness 12mm, length are 10m to state experimental section (1)；The length that the acetylene ignites section is
0.3m。
3. combustible gas explosion experiment system in a kind of small size pipeline according to claim 1, it is characterised in that：Institute
State hydrogen source pipeline, source nitrogen pipeline, source of oxygen main pipeline, carbon monoxide source pipeline, acetylene source capsule road and source of oxygen bypass duct
Road is 16 millimeters of outer diameter, the stainless steel tube that 2 millimeters of wall thickness.
4. the experimental method of combustible gas explosion experiment system, feature in a kind of small size pipeline described in claim 1
It is：
System is vacuumized, ignition section static pressure valve (39), experimental section static pressure valve (40), pneumatic pump valve (4), hydrogen motor-driven valve are made
(14), hydrogen shut-off valve (11), nitrogen motor-driven valve (19), nitrogen shut-off valve (17), oxygen motor-driven valve (25), the cut-off of the first oxygen
Valve (22), carbon monoxide shut-off valve (30), acetylene motor-driven valve (38), acetylene shut-off valve (35), import main valve (8), the second oxygen
Shut-off valve (26), third oxygen stop valve (27) and vacuum pump motor-driven valve (3) are in open state, remaining valve, which is in, closes shape
State opens vacuum pump (2), ignites section static pressure transducer (41) and experimental section static pressure transducer (42) is read when being 0KPa, take out
Vacuum stages terminate；It then is filled with nitrogen toward experimental section, closes vacuum pump motor-driven valve (3), hydrogen motor-driven valve (14) and oxygen electricity
Dynamic valve (25), closes vacuum pump (2), opens hydrogen source (101) gate out switch, nitrogen pressure reducing valve (15) and nitrogen diaphragm valve
(16), it is operating mode preset pressure so that ignition section static pressure transducer (41) and experimental section static pressure transducer (42) is read；Then toward real
It tests section and pours oxygen, close nitrogen motor-driven valve (19), source nitrogen (102) gate out switch, nitrogen pressure reducing valve (15), nitrogen diaphragm valve
(16) and nitrogen shut-off valve (17) source of oxygen (103) gate out switch, oxygen pressure reducing valve (20), oxygen diaphragm valve (21), oxygen, are opened
Gas motor-driven valve (25), the second oxygen stop valve (26) and third oxygen stop valve (27) make experimental section static pressure transducer (42) read
Number is operating mode preset pressure, closes oxygen motor-driven valve (25), and it is operating mode preset pressure to make ignition section static pressure transducer (41) reading,
Close the second oxygen stop valve (26) and third oxygen stop valve (27)；Hydrogen then is poured toward experimental section, it is electronic to close oxygen
Valve (25), source of oxygen (103) gate out switch, oxygen pressure reducing valve (20), oxygen diaphragm valve (21) and the first oxygen stop valve (22),
Hydrogen source (101) gate out switch, hydrogen pressure reducing valve (9), hydrogen diaphragm valve (10) and hydrogen motor-driven valve (14) are opened, experimental section is made
Static pressure transducer (42) reading is operating mode preset pressure；Then begin to stir and make muddy gas, close hydrogen motor-driven valve (14) and hydrogen every
Film valve (10) opens hydrogen exhaust valve (13), and open the circulation pump (6) makes each gas component start recording data after mixing,
Pneumatic pump valve (4), import main valve (8) are closed, section static pressure valve (39) and experimental section static pressure valve (40) are ignited, starts acquisition note
It records, later on ignition switch (58), it is rear after situation without exception to stop acquisition, record experimental data；Experiment after the completion of open into
Mouth main valve (8), pneumatic pump valve (4) and ignition section static pressure valve (39), experimental section static pressure valve (40) are exhausted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810114170.0A CN108389636B (en) | 2018-02-05 | 2018-02-05 | Combustible gas explosion experiment system and method in a kind of small size pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810114170.0A CN108389636B (en) | 2018-02-05 | 2018-02-05 | Combustible gas explosion experiment system and method in a kind of small size pipeline |
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