CN209215242U - A kind of experimental system of precision energy jet ignition measurement flame forms - Google Patents
A kind of experimental system of precision energy jet ignition measurement flame forms Download PDFInfo
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Abstract
The utility model discloses a kind of experimental system of precision energy jet ignition measurement flame forms, including with the tank connected combustion gas bottle of pressure and inert gas bottle, the exhaust end of pressurized tank connects exhaust pipe, high-pressure pneumatic ball valve and precision energy ignition system are installed, the downstream of exhaust pipe is equipped with the distance calibration device connecting with control processing system and the camera shooting decorum on exhaust pipe.The utility model has the following beneficial effects: environment under different conditions, the specific ignition energy and identical fuel gas (or liquid) that jet flames is formed after different fuel gas (or liquid) are released, the changing rule of the ignition energy under different initial release pressure can be measured；Measurement is incremented by with the time, metamorphosis of the high-velocity flame spray to free space, the length of flame, flame width, flame tip spread speed etc., the flame location in precise positioning picture, the accuracy that measurement flame related data can be improved, excludes the interference of other light sources.
Description
Technical field
The utility model relates to high pressure fuel gas or liquid to leak the monitoring neck met incendiary source and form jet flames suddenly
Domain more particularly to high pressure fuel gas or liquid leak suddenly meets surveillance and control measure and the extent of injury that incendiary source forms jet flames
Assessment.
Background technique
There are many kinds of fuel gas includes, such as such as hydrogen (H2), carbon monoxide (CO), methane (CH4), ethane
(C2H6), propane (C3H8), butane (C4H10), ethylene (C2H4), propylene (C3H6), butylene (C4H8), acetylene (C2H2), third
The pure fuel gas such as alkynes (C3H4), butine (C4H6), hydrogen sulfide (H2S), hydrogen phosphide (PH3).In addition to pure fuel gas, also
Including some mixture fuel gas.For example, the liquefied petroleum gas got from PETROLEUM PROCESSING or petroleum, gas exploitation course
(its main component is propane, propylene, butane and butylene)；(main component is for the adjoint and natural gas that goes out when oilfield exploitation crude oil
Methane, also containing a small amount of ethane, butane, pentane, carbon dioxide, carbon monoxide, hydrogen sulfide etc.), the explosion limit of natural gas is
5%-15%；Colorless and odorless and the gas (main component methane) for being insoluble in water；The main component of coal gas is CO, hydrogen and alkane, alkene
Hydrocarbon, aromatic hydrocarbons etc.；The main component of biogas is methane, remaining is for carbon dioxide, oxygen, nitrogen and hydrogen sulfide etc..Flammable liquid
Refer to that silent cup flash-point is equal to or higher than 45 DEG C of liquid.Wherein, common flammable liquid has alcohol, gasoline, diesel oil in life
Etc..Fuel gas and flammable liquid in combustible are released into air suddenly, can mix with air to form a certain concentration
Flammable premix substance, if incendiary source can occur burn or explode, if flammable pre-composition is combined material continuous release if will form continue
Jet flames.
With the gradually completion and the exploitation of offshore oil and gas field of West-East National Gas Transmission Project, natural gas, because is that transport uses just
The stability of victory and price is rapidly developed.China's natural gas yield arranges the 5th in the world, in the day of people
Often in life, a large amount of extensive uses of natural gas will lead to all kinds of danger source quantity and be continuously increased.Production, storage in chemical industry
Deposit, transport and use process in, natural gas, liquefied petroleum gas and hydrogen etc. have slightly improper disposal, fire
And explosion accident.According to statistics, it 59.5% is fire incident in fuel gas transport process, 34.5% is explosion accident, and 6% is other
Accident.The fuel gas or liquid of pressurization form jet stream in leakage, will form spray if being ignited by an ignition source at leakage hole just
Penetrate fire.Jet bubble reactor flame and its heat radiation can damage surrounding people.Jet bubble reactor accident easily causes surrounding once occurring
Equipment is of serious failure or even catastrophic destruction, and then a series of secondary accident occurs, and consequence will be hardly imaginable.Such as,
On August 4th, 1962, Mobil Oil Corp., Saudi Arabia fire encounter ignition source and are formed since one of reservoir gas leaks
The gas of neighbouring storage tank is ignited and melts safety valve by jet bubble reactor, the intensity of a fire；On January 9th, 1984, Mexico's national oil are public
It takes charge of a liquefied petroleum gas oil terminal in Mexico City San Juan and a series of fire and explosion has occurred, originally derived from spray
The generation of fiery accident is penetrated, vaporous cloud explosion accident successively has occurred again.It is analyzed by summary, it can be found that after jet flames generates
Influence consequence it is very serious.Therefore, to lose caused by the generation and reduction accident of prevention jet bubble reactor accident, research is different
Different fuel gas or liquid, which result in the size of jet bubble reactor ignition energy and jet bubble reactor scope of damage, under environment has weight
Want meaning.
Utility model content
It releases suddenly the purpose of the utility model is to provide a kind of high pressure fuel gas or liquid and is ignited and is formed spray
Penetrate the experimental system and measurement method of flame；Electric spark energy can be accurately controlled to combustible gas by precision energy ignition system
Body or liquid realizes and actively lights a fire, and safely realizes releasing for fuel gas or liquid, under the conditions of can also judging varying environment
The influence that discharge energy releases for fuel gas or liquid, monitors the leakage of fuel gas or liquid, and sets up assessment spray
Penetrate the evaluation system of flame scope of damage.
To achieve the above object, the utility model provides a kind of experiment of precision energy jet ignition measurement flame forms
System, the technical solution used are as follows: including combustion gas bottle, inert gas bottle, pressurized tank, pumped vacuum systems, high-pressure pneumatic
Ball valve, precision energy ignition system, distance calibration device, camera system and control processing system, the combustion gas bottle and lazy
Property gas bottle pass through the inlet end of high pressure line and pressurized tank respectively and connect, the exhaust end of pressurized tank is connected with exhaust pipe, institute
The front end for stating exhaust pipe is equipped with high-pressure pneumatic ball valve, and the spout end of exhaust pipe is equipped with precision energy ignition system, row
The downstream of feed channel is equipped with distance calibration device and the camera shooting decorum, and the distance calibration device and the camera shooting decorum pass through conducting wire respectively
It is connect with control processing system, pumped vacuum systems is connect by pressure piping with pressurized tank, and connects control processing by conducting wire
System.
Further, the distance calibration device includes weight bearing foundation, Calibration Column and fluorescence lamppost, the bottom of the Calibration Column
Portion is equipped with connection deck, and the Calibration Column includes cylinder and the arrow for being located at the upper end, and the weight bearing foundation is equipped with
Track, connection deck sliding set on the track and are fixed by fastening bolt, and the Calibration Column is equipped with fluorescence column.
Further, precision energy ignition system includes accurate energy controller, discharge electrode probe and engaging part, and two
A discharge electrode probe passes through the engaging part spout end symmetrical above and below for being installed in exhaust pipe, two discharge electrodes
The discharge electrode tips of probe are opposed, inwardly directed to be bent and is mutually not in contact with each other, and the discharge electrode probe passes through power supply line and accurate energy
Amount controller connection.Preferably, discharge electrode probe is silver-tungsten alloy probe.
Further, the engaging part includes adapter sleeve and sets solid gasket inside it, and the solid gasket is ring-type
Structure is set on the lateral wall at exhaust pipe spout end, is stated and is symmetrically arranged with receiving electric discharge electricity along central shaft on solid gasket
The fixation hole of pole probe, collar are located at outside the connecting plate and are bolted.
The utility model has the following beneficial effects:
1. environment under different conditions, for example, the items such as different temperatures, humidity and different fuel gas (or liquid)
Under part, the specific ignition energy that different fuel gas (or liquid) form jet flames after releasing in pressurized tank can be measured.
And identical fuel gas (or liquid), the changing rule of ignition energy etc. under different initial release pressure；
2. putting point electrode probe material is silver-tungsten alloy.The characteristics of silver-tungsten alloy is hardness height, anti electric arc corrosion, anti-glutinous
And anti-melting welding ability it is strong, current interruption performance is good, and conductive and heat-conductive is good, thermally expand it is small, high temperature does not soften；
3. fuel gas (or liquid) lights a fire to form jet flames by jet ignition system, MATLAB software program is utilized
In gray proces and binary processing method, measurement with the time be incremented by, the form of high-velocity flame spray to free space
Variation, the length of flame, flame width, flame tip spread speed etc.；
4. distance calibration device can demarcate the position of pixel in picture, pass through fire of the precise positioning into picture later
Flame position can be improved the accuracy of measurement flame related data, exclude the interference of other light sources.
Detailed description of the invention
Fig. 1 the utility model schematic view of the front view.
Fig. 2 is the structural schematic diagram of distance calibration device.
Fig. 3 is precision energy ignition system structural schematic diagram.
Fig. 4 is the cross-sectional view for fastening precision energy igniter.
Wherein, 1- combustion gas bottle, 2- inert gas bottle, 3- pressurized tank, 4- pumped vacuum systems, 5- high-pressure pneumatic ball valve,
51- remote controllers, 6- precision energy ignition system, the accurate energy controller of 61-, 62- discharge electrode probe, the holding section 63-
Part, 631- adapter sleeve, 632- consolidate gasket, 633- fixation hole, 634- bolt, 7- distance calibration device, 71- weight bearing foundation, 72- mark
Fixed column, 721- cylinder, 722- arrow, 73- fluorescence lamppost, 74- connection deck, 75- track, 8- camera system, 9- control
Processing system, 10- high pressure line, 11- exhaust pipe, 12- flame.
Specific embodiment
Following embodiment further illustrates the content of the utility model, but should not be construed as a limitation of the present invention.
Without departing substantially from the utility model in essence, to modification made by the utility model method, step or condition and replace,
Belong to the scope of the utility model.
As shown in Figure 1-3, a kind of experimental system of precision energy jet ignition measurement flame forms, including combustion gas bottle
1, inert gas bottle 2, pressurized tank 3, pumped vacuum systems 4, high-pressure pneumatic ball valve 5, precision energy ignition system 6, distance calibration dress
Set 7, camera system 8 and control processing system 9；The combustion gas bottle 1 and inert gas bottle 2 respectively by high pressure line 10 with
The inlet end of pressurized tank 3 connects, and installs control valve respectively on high pressure line 10 in order to control combustion gas bottle and inert gas
The flow of bottle air；Pressurized tank is equipped with pressure gauge 12, and the exhaust end of pressurized tank 3 connects exhaust pipe 11, the exhaust pipe
11 front end is equipped with high-pressure pneumatic ball valve 5, and high-pressure pneumatic ball valve 5 is controlled by the remote controllers 51 being wirelessly connected with it
It opens or closes；Pumped vacuum systems is connect by pressure piping with pressurized tank, and connects control processing system by conducting wire.
Combustion gas bottle (can also be flammable liquid bottle) and inert gas steel cylinder are both from standard industry cylinder filling
Company；Pass through inert gas purge package unit property to ensure safety；The pressurized tank volume used in the present embodiment is 3L, high pressure
Pipeline, exhaust pipe, control valve, high-pressure pneumatic ball valve are all made of 316L stainless steel, and a whole set of experimental system highest pressure-bearing is reachable
30MPa discharges initial pressure by high-pressure pneumatic ball valve, and initial release pressure is between 0-20MPa.
In the present embodiment, high voltage startup ball valve is apart from pressurized tank 100mm, and high-pressure pneumatic ball valve is apart from exhaust pipe spout end
Distance be 300mm, it is replaceable with the tank connected exhaust pipe of pressure, 10mm, 15mm, 20mm and 25mm can be used in embodiment
The exhaust pipe of four kinds of internal diameters；High-pressure pneumatic ball valve and pressurized tank and downstream line pass through the (letter of bonding in vacuum radial seal mode
Claim VCR) it is formed by connecting.
The spout end of exhaust pipe 11 is equipped with precision energy ignition system 6, and the precision energy ignition system includes essence
Quasi-energy controller 61, discharge electrode probe 62 and engaging part 63；The engaging part 63 includes adapter sleeve 631 and is located at it
Internal solid gasket 632, the solid gasket 632 are cyclic structure, the solid gasket preferably polytetrafluoroethylene used in the present embodiment
It is made, is set on the lateral wall at exhaust pipe spout end, Gu it is symmetrically set on the lateral wall at gasket spout end along central shaft
There is the fixation hole 633 for accommodating discharge electrode probe, the fixing end of two discharge electrode probes 62 is embedded in fixation hole, and two
The discharge electrode tips of a discharge electrode probe 62 are opposed, inwardly directed to be bent and is mutually not in contact with each other, the electric discharge of the present embodiment middle probe
Eletrode tip spacing is 3mm；It is arranged with the adapter sleeve of metal material outside the connecting plate, is fastened in this implementation using stainless steel
Set, adapter sleeve 631 are fixed by the bolt 634 being located on its lateral wall；The discharge electrode probe is by power supply line and precisely
Energy controller 61 connects, and accurate energy controller connects control processing system 9 by conducting wire.
The downstream of exhaust pipe 11 is equipped with distance calibration device 7 and the camera shooting decorum 8, the two are fixed by the bracket respectively in institute
It needs on position；The distance calibration device 7 and the camera shooting decorum 8 connect 9 with control processing system by conducting wire respectively, the distance
Caliberating device 7 includes weight bearing foundation 71, Calibration Column 72 and fluorescence lamppost 73, and the bottom of the Calibration Column 72 is equipped with connection deck
74, the Calibration Column includes cylinder 721 and the arrow 722 for being located at the upper end, and the weight bearing foundation is equipped with track 75, even
It connects the sliding of deck 74 to be located on the track 75 and fix by fastening bolt, the Calibration Column is equipped with fluorescence column 73.
Testing process:
(1) airtight test: according to test purpose, the connection of each component and firm closure by experimental system are closed simultaneously
Exhaust pipe spout end adds to convenient pressure using inert gas later, is then applied to each link position with suds, examines
Package unit air-tightness is looked into, confirmation air-tightness well carries out next step experiment afterwards；
(2) it vacuumizes, injects fuel gas (or liquid): after confirmation package unit air-tightness is good, closing indifferent gas
Body cylinder valve opens exhaust pipe spout end；Then, high-pressure pneumatic ball valve 5 and inert gas cylinder valve are closed, steel is opened
The valve on high pressure line between bottle valve and pressurized tank opens pumped vacuum systems later with discharge pressure tank and high-voltage tube
Air in line；After draining the air in pressurized tank and high pressure line, closing pumped vacuum systems, unlatching fuel gas (or
Liquid) cylinder valve, into pressurized tank inject fuel gas (or liquid), to pressure gauge show pressurized tank in fuel gas (or
Liquid) when will reach specified pressure, fuel gas (or liquid) flow is reduced, when pressurized tank reaches specified pressure, close
Fuel gas (or liquid) cylinder valve can stop injecting fuel gas (or liquid)；
(3) experimental monitoring: after pressurized tank reaches specified pressure, high-speed camera and control processing system is opened simultaneously, is adjusted
Test system simultaneously chooses high-speed camera and puts optimum position, opens precision energy ignition system, passes through control processing system input
Accurate energy value opens discharge electrode constant ignition；Later, it opens high-pressure pneumatic ball valve and discharges fuel gas into exhaust pipe
(or liquid), until experiment finish (that is, jet flames extinguish after or downstream line nozzle do not find flame)；
(4) experiment finishes follow-up work: after experiment, closing precision energy ignition system, closing high-speed camera system；
Later, inert gas cylinder valve is opened, inert gas purge is carried out, after package unit fuel gas (or liquid) is blown off,
Preparation is tested next time.
Camera system in the present embodiment uses high-speed camera, and pick-up lens must be in water with the downstream of exhaust pipe
Placing flat, placement location should be other than risk distance and 12 extreme length middle position of flame is best, and its visual field Ying Bao
Entire jet flames is included, so placing high-speed camera can reduce error.
Control processing system is primarily used to the correlation of processing jet flames metamorphosis and accurate energy ignition system
Data.The distance between two cylinders of set distance caliberating device are 50cm in the present embodiment, are taken the photograph by control system reading
As the image that system is transmitted, total number of images amount is obtained；Then, the actual range of marker is in the image obtained by video camera
50cm, the point bit value of marker in image is determined according to the pixel point in image between marker, and its value is set in
It is arranged in control processing system；Then, from the image interception optimum position of acquisition, it is (such as lamppost light, anti-that other light are excluded
Penetrate light etc.) interference, quickly positioning to jet flames, the optimized image width and image length of interception, and according to the actual situation will
The value of optimized image width and image length is set separately into control processing system；Later, starting control process systems programme,
Control processing system can choose automatically the image of the condition of satisfaction first, and read image one by one, and every image is then carried out ash
Degreeization and binary conversion treatment, the image after every binary conversion treatment can obviously highlight the profile of flame, then at control
Reason system can determine that the distance of each pixel point reads the length and width of white flame contours, all images according to marker
After being disposed, the length of flame and width value meeting automatic access are into the table of formulation；Finally, image procossing finishes, will handle
Image afterwards is saved to specified destination folder, while the number that the length and width of available jet flames is incremented by with the time
Value variation.
The control processing system of the present embodiment can be used MATLAB software program and carry out gray proces and binary conversion treatment,
The software program that other, which can be used, can reach the purpose is handled.
The basic principles and main features and advantage of the utility model have been shown and described above.But the foregoing is merely
Specific embodiment of the utility model, the technical characteristics of the utility model are not limited thereto, any those skilled in the art
The other embodiments obtained in the case where not departing from the technical solution of the utility model should all cover the patent model in the utility model
Among enclosing.
Claims (4)
1. a kind of experimental system of precision energy jet ignition measurement flame forms, which is characterized in that including combustion gas bottle, lazy
Property gas bottle, pressurized tank, pumped vacuum systems, high-pressure pneumatic ball valve, precision energy ignition system, distance calibration device, camera shooting system
System and control processing system, the combustion gas bottle and inert gas bottle pass through high pressure line respectively and the inlet end of pressurized tank connects
It connects, the exhaust end of pressurized tank is connected with exhaust pipe, and the front end of the exhaust pipe is equipped with high-pressure pneumatic ball valve, exhaust pipe
Spout end precision energy ignition system is installed, the downstream of exhaust pipe is equipped with distance calibration device and the camera shooting decorum, described
Distance calibration device and camera shooting the decorum pass through respectively conducting wire with control processing system connect, pumped vacuum systems pass through pressure piping and
Pressurized tank connection, and control processing system is connected by conducting wire.
2. a kind of experimental system of precision energy jet ignition measurement flame forms according to claim 1, feature exist
In the distance calibration device includes weight bearing foundation, Calibration Column and fluorescence lamppost, and the bottom of the Calibration Column is equipped with connection card
Seat, the Calibration Column include cylinder and the arrow for being located at the upper end, and the weight bearing foundation is equipped with track, and connection deck is sliding
Dynamic to set on the track and fixed by fastening bolt, the Calibration Column is equipped with fluorescence column.
3. a kind of experimental system of energy jet ignition measurement flame forms according to claim 1, which is characterized in that essence
True energy ignition system includes accurate energy controller, discharge electrode probe and engaging part, two discharge electrode probes
Pass through the engaging part spout end symmetrical above and below for being installed in exhaust pipe, the discharge electrode tips of two discharge electrode probes
Opposed, inwardly directed to bend and be mutually not in contact with each other, the discharge electrode probe is connect by power supply line with accurate energy controller.
4. a kind of experimental system of energy jet ignition measurement flame forms according to claim 3, which is characterized in that institute
It states engaging part to include adapter sleeve and set solid gasket inside it, the solid gasket is cyclic structure, is set in exhaust pipe
On the lateral wall at road spout end, the fixation hole for being symmetrically arranged on solid gasket along central shaft and accommodating discharge electrode probe, fastening are stated
Lantern ring is located at outside the solid gasket and is bolted.
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|---|---|---|---|
| CN201822012695.1U CN209215242U (en) | 2018-12-03 | 2018-12-03 | A kind of experimental system of precision energy jet ignition measurement flame forms |
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| CN201822012695.1U CN209215242U (en) | 2018-12-03 | 2018-12-03 | A kind of experimental system of precision energy jet ignition measurement flame forms |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111812145A (en) * | 2020-07-27 | 2020-10-23 | 西南交通大学 | Low-temperature liquid hydrogen jet flame research experimental device |
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2018
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111812145A (en) * | 2020-07-27 | 2020-10-23 | 西南交通大学 | Low-temperature liquid hydrogen jet flame research experimental device |
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