CN209707427U - A kind of explosion limit tester - Google Patents
A kind of explosion limit tester Download PDFInfo
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- CN209707427U CN209707427U CN201920125213.5U CN201920125213U CN209707427U CN 209707427 U CN209707427 U CN 209707427U CN 201920125213 U CN201920125213 U CN 201920125213U CN 209707427 U CN209707427 U CN 209707427U
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- glass test
- test container
- heat
- explosion limit
- preservation liner
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Abstract
The utility model discloses a kind of explosion limit testers, including experimental rig and control mechanism, experimental rig includes the glass test container with lid folder, high-frequency igniter and heat-preservation liner, control mechanism includes infrared heater, compression refigerating machine, pressure sensor and vacuum pump, lid folder is equipped with temperature sensor, glass test container is placed in heat-preservation liner, the ignitor of high-frequency igniter is set in glass test container, infrared heater is set to heat-preservation liner bottom, compression refigerating machine refrigerating thermal-insulation liner, the pressure sensor, vacuum pump is connect with glass test container.Above-mentioned explosion limit tester is suitable for solid-vapor, liquid vapour, gaseous matter and the explosible limit concentration of the substances under required test temperature such as mixture formed with air, and easy to operate, accuracy is high, and safety is good.
Description
Technical field
The utility model relates to gas concentration detection fields, and in particular to a kind of explosion limit tester.
Background technique
Explosion limit tester universal automation degree on domestic market is low, detection accuracy is low, low efficiency, safety
Property it is poor, existing equipment has been difficult to meet calibrating and has required, and there is an urgent need to use the inspection for meeting the requirements of the standard, adapting to era development
Measurement equipment to carry out hazard property detection and Package Classification to these substances.Therefore new explosion limit tester is needed to meet
Market and meet international new standard.
Notification number is that the patent specification of CN205643224U discloses a kind of combustible gas explosion limit concentration mensuration examination
Experiment device, including gas igniter and gas concentration detection apparatus, the gas igniter include pressure gauge, safety
Plug, reaction tube, intake valve, vacuum pump, discharge electrode and high voltage power supply；The gas concentration detection apparatus include shut-off valve,
Air communicating pipe, gas concentration detector and gas circulator；The top and bottom end of the reaction tube are connect with flame-arrester vent plug,
The top half of the reaction tube is connect with pressure gauge, intake valve and vacuum pump, the lower half portion of the reaction tube with put
Electrode is connected with air communicating pipe, the both ends of the air communicating pipe respectively close to discharge electrode positive and negative both ends without with
Discharge electrode contact, the shut-off valve, gas circulator and gas concentration detector are connected by air communicating pipe.Above-mentioned dress
It sets and cannot achieve heating or refrigerating function, and can not easily detect the explosion limit of the steam of solid or liquid.
The patent specification that notification number is CN104749218B discloses flammable gas explosion characteristic under a kind of ultralow temperature and surveys
Trial assembly is set, including a refrigerating plant, is placed with the explosive container that a draw ratio is 3:1, explosive container in the inner cavity of refrigerating plant
Gap is formed between the inner cavity of refrigerating plant, which, which is added with, makes the gas in explosive container and explosive container be down to reality
Test the Heat Conduction Material of temperature；The top of explosive container is sealed by a blind flange, set inside explosive container there are two and ignition energy
The connected ignitor of console is measured, the bottom of explosive container is equipped with the leakage fluid dram for realizing carbon distribution cleaning in explosive container, explosion
The foil gauge of thermal stress in real-time monitoring blast process is posted on the inner wall of container；Blind flange is equipped with temperature sensor, pressure
Sensor and the air inlet and gas vent being connected to explosive container inside.The refrigerating plant uses cryogenic testing case,
Its use temperature range is room temperature~-160 DEG C, compressor refrigeration is used inside cryogenic testing case, and refrigerant circulation uses.
Utility model content
For shortcoming existing for this field, the utility model provides a kind of explosion limit tester, is suitable for solid
Body steam, liquid vapour, gaseous matter and the explosion pole of the substances under required test temperature such as mixture formed with air
Concentration is limited, easy to operate, accuracy is high, and safety is good.
A kind of explosion limit tester, including experimental rig and control mechanism, the experimental rig include with lid folder
Glass test container, high-frequency igniter and heat-preservation liner, control mechanism include infrared heater, compression refigerating machine, pressure pass
Sensor and vacuum pump, the lid folder are equipped with temperature sensor, and glass test container is placed in heat-preservation liner, high-frequency igniter
Ignitor be set to glass test container in；The infrared heater is set to heat-preservation liner bottom, compression refigerating machine refrigeration
Heat-preservation liner, the pressure sensor, vacuum pump and glass test container connect.
Vacuum pump is for vacuumizing and cleaning glass test container, infrared heater and compression refigerating machine for adjusting test
Required temperature, heat-preservation liner play heat insulation effect.After the sample material in glass test container reaches required temperature, high frequency points
Firearm igniting carries out explosive test.Temperature and air pressure in temperature sensor, pressure sensor real-time detection glass test container
Situation.
Preferably, lid folder is equipped with fluid injection opening, and testing liquid is tested by fluid injection opening implantation glass
Container.
Preferably, lid folder is equipped with humidity sensor, monitors the humidity in glass test container.
Preferably, explosion-proof solenoid valve is connected between the glass test container and pressure sensor.Explosion-proof solenoid valve
Effect be that spark generating unit is allowed to be isolated with pressure sensor, not only have bear gas burst pressure flameproof effect, and
And there is retardation to gas burst energy transmission, security performance is high.
Preferably, the glass test container pass sequentially through solenoid valve, solenoid valve, pressure maintaining valve and filter with
Atmosphere or gas cylinder connection.Solenoid valve is used to control the on-off of gas circuit.Solenoid valve is used for adjusting gas flow size.Pressure maintaining valve
For adjusting the size of air pressure, and make stable gas pressure.Filter is used to filter the moisture in gas.
Preferably, the glass test container is made of high borosilicate glass material, high temperature resistant, and light transmittance is high.
Preferably, the heat-preservation liner is equipped with the camera connecting with computer, monitors glass test container.
Preferably, the glass test container has magnetic stirrer.Magnetic stirrer is used for stirring glass test
Sample to be tested in container is allowed to be sufficiently mixed and reaches thermal balance.
Preferably, the control mechanism further includes emergency stop switch and self-lock switch.Emergency stop switch is used for explosion limit
Tester carries out emergent stopping.
Preferably, the heat-preservation liner has relief valve, and heat-preservation liner front is equipped with observation window, and rear portion is equipped with explosion-proof
Door.When the pressure in the glass test container explosion time in heat-preservation liner, heat-preservation liner can be increased sharply, relief valve and anti-at this time
Quick-fried door can be opened, and reduce the pressure in heat-preservation liner in time, prevent the hypertonia in heat-preservation liner and before leading to heat-preservation liner
The observation window in portion explodes, and causes harm to the human body.
The heat-preservation liner can be baking oven liner, be rectangular parallelepiped structure, inner space utilization rate is high, by stainless steel mirror
Panel composition, liner surrounding can be laid with glass heat-insulating cotton and thermal insulation board, prevent heat loss.
Compared with prior art, major advantage includes: suitable for solid-vapor, liquid vapour, gas object to the utility model
The explosible limit concentration of the substances under required test temperature such as matter and the mixture formed with air, easy to operate, accuracy
Height, safety are good.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the forward sight of the explosion limit tester of embodiment；
Fig. 2 is the structural schematic diagram of the backsight of the explosion limit tester of embodiment；
In figure: castor 1；Bottom plate 2；Oilless vacuum pump 3；Energy supply control module 4；Vaccum stop valve 5；Pressure maintaining valve 6；It is infrared to add
Hot device 7；Heat-preservation liner 8；Emergency stop switch 9；Self-lock switch 10；Display screen 11；Humidity sensor 12；Lid folder 13；Glass test is held
Device 14；Camera 15；Camera bracket 16；Magnetic stirrer 17；Locating rack 18；Magnetic stirring motor 19；Three-in-one switch 20；
Electric machine controller 21；Compression refigerating machine 22；Explosion proof door 23；Fluid injection opening 24；Temperature sensor 25；USB interface 26；Electromagnetism tune
Save valve 27；Filter 28；Pressure sensor 29；Solenoid valve 30；Explosion-proof solenoid valve 31；Condenser 32；Air inlet 33.
Specific embodiment
With reference to the accompanying drawing and specific embodiment, the utility model is further described.It should be understood that the implementation of the utility model
Example is merely to illustrate the utility model rather than limitation the scope of the utility model.Actual conditions are not specified in the following example
Method, usually according to normal condition, or according to the normal condition proposed by manufacturer.
The explosion limit tester of the present embodiment, including bottom plate 2, experimental rig and control mechanism.
2 lower end of bottom plate is equipped with 4 castors 1, is used to support bottom plate, easy to remove.Experimental rig and control mechanism are set to bottom
On plate 2.
Experimental rig includes lid folder 13, magnetic stirrer 17, glass test container 14, high-frequency igniter and heat-preservation liner 8.
Lid folder 13 is used cooperatively by spring, nuts and bolt, for covering tightly glass test container 14, is improved glass test and is held
The leakproofness of device 14.Lid folder 13 is equipped with fluid injection opening 24, humidity sensor 12 and temperature sensor 25.Liquid pilot substance
Out of fluid injection opening 24 implantation glass test container 14.Temperature sensor 25 is used to monitor the temperature in glass test container 14
Degree.Humidity sensor 12 is used to monitor the humidity in glass test container 14.
Glass test container 14 uses high borosilicate glass material, and high temperature resistant, light transmittance is high, for holding trier
Matter.Glass test container 14 passes through the locating rack 18 to match and is placed in heat-preservation liner 8.
Magnetic stirrer 17 is placed in 14 bottom of glass test container, for the test in stirring glass test container 14
Substance is allowed to be sufficiently mixed and reaches thermal balance.
The inner wall fitting glass heat-insulating cotton of heat-preservation liner 8 and thermal insulation board, prevent heat transfer to instrument surface.Heat-preservation liner
8 also have 2 grades of elongnated building devices, respectively relief valve and the explosion proof door 23 set on 8 rear portion of heat-preservation liner.Before heat-preservation liner 8
Portion is equipped with protective door, and protective door has observation window.When in 14 explosion time of glass test container in heat-preservation liner 8, heat-preservation liner 8
Pressure can sharply increase, relief valve and explosion proof door 23 can be opened at this time, in time reduce heat-preservation liner 8 in pressure, prevent from protecting
Hypertonia in warm liner 8 and cause the protective door of 8 front of heat-preservation liner to flick, observation window explosion, cause harm to the human body.
The ignitor of high-frequency igniter is set in glass test container 14.The ignition parameter of high-frequency igniter is 15kV/
30mA, ignition duration is adjustable, is 0.1~0.5s, supports terminal igniting and two kinds of ignition modes of remote control ignition.Protective door closes
Closing could light a fire, and igniting is avoided to cause the injury to personnel.
Control mechanism includes energy supply control module 4, main control unit and control switch.
Energy supply control module 4 is mounted on the rear portion of explosion limit tester, for powering.
Main control unit and host are electrically connected, and are controlled by host, including display screen 11, camera 15, USB interface
26, magnetic stirring motor 19, electric machine controller 21, compression refigerating machine 22, condenser 32, solenoid valve 30, solenoid valve 27, steady
Pressure valve 6, filter 28, explosion-proof solenoid valve 31, pressure sensor 29, vaccum stop valve 5, oilless vacuum pump 3 and infrared heater
7。
Display screen 11 is driven, for control and operation for showing information or input information by built-in mainboard.
Camera 15 is fixed in heat-preservation liner 8 by camera bracket 16, is connect by the USB of USB connecting line and computer
Mouth 26 is connected, and for real-time display, storage test picture, efficient video monitoring system, resolution ratio is realized up to 120 frames/second
The functions such as videograph playback.
Magnetic stirring motor 19 is located at the lower end of locating rack 18, for driving magnetic stirrer 17 to stir substances
It mixes, be uniformly mixed.
Electric machine controller 21 is placed on bottom plate 2, for driving the movement of magnetic stirring motor 19.
22 refrigerating thermal-insulation liner 8 of compression refigerating machine, condenser 32 can realize automatic water circulation, for compression refigerating machine 22
Heat dissipation.Minimum reachable -10 DEG C of 22 temperature control of compression refigerating machine, reachable ± 1 DEG C of precision.
Atmosphere or gas cylinder pass sequentially through air inlet 33, filter 28, pressure maintaining valve 6, solenoid valve 27 and solenoid valve 30
It is connected to glass test container 14.Filter 28 is used to filter the moisture in gas.Pressure maintaining valve 6 is used to adjust the size of air pressure,
And make stable gas pressure.Solenoid valve 27 is used for the size of adjusting gas flow.Solenoid valve 30 is used to control the on-off of gas circuit.
Solenoid valve 30 is three-port structure, and first interface is connected with solenoid valve 27, second interface and glass test container
14 are connected, and third interface is connected with explosion-proof solenoid valve 31.
The other end of explosion-proof solenoid valve 31 is connect with pressure sensor 29.The effect of explosion-proof solenoid valve 31 is that spark is allowed to generate
Position is isolated with pressure sensor 29, not only has the flameproof effect for bearing gas burst pressure, and to gas burst energy
Transmitting has retardation, and security performance is high, can bear the instantaneous pressure impact of 0~50bar, degree of protection IP65.
Pressure sensor 29 is used to detect air pressure situation in glass test container 14, high frequency sound, and the response time is
2.5ms, degree of protection IP65.
Oilless vacuum pump 3 is connect by vaccum stop valve 5 with glass test container 14.Vaccum stop valve 5 is true for separating
It is empty.Oilless vacuum pump 3 is for vacuumizing, convenient for cleaning to glass test container 14 and pipeline.Oilless vacuum pump 3 prevents
Pump oil aoxidizes risk, final vacuum≤8Pa.
Infrared heater 7 is set to 8 bottom of heat-preservation liner, and infrared radiation heating glass test container 14, heating rate is fast, control
Reachable ± 1 DEG C of warm precision.
Control switch includes emergency stop switch 9, self-lock switch 10 and three-in-one switch 20.Emergency stop switch 9 and self-lock switch 10
It is arranged below display screen 11, emergency stop switch 9 is used to carry out emergent stopping to explosion limit tester.Three-in-one switch 20 is used for
It is connect with external power supply.
The explosion limit tester of the present embodiment also has self-test and warning function, and test is completed automatic acousto-optic and reminded, branch
It holds parameter setting, data storage, check the functions such as report, automatically record initial data, judge automatically test result, match 7 inches
Industrial panel computer matches capacitive touch screen, and (SuSE) Linux OS supports network connection, realizes remote control and data transmission.
It is tested using the explosion limit tester of the present embodiment, preparation includes:
(1) substances are gas: gas sample being accessed to " sample to be tested " air inlet 33 of instrument lower part before test, is adjusted
The gas output for saving feeder is at least 0.3MPa, detects the air-tightness of glass test container 14；
(2) substances are liquid: the sample size to be carried out are taken with syringe, after instrument is completed cleaning, vacuumized
Liquor sample is passed through into the 24 implantation glass test container 14 of fluid injection opening on lid folder 13；
(3) substances are solid: lid folder 13 being opened, solid sample is put into glass test container 14；
(4) camera: being inserted into the end PC USB interface 26 for the USB connecting line of camera 15, opens camera and captures software,
Situation in glass test container 14 can be observed in real time.It is chosen pair according to 14 capacity of glass test container at camera software interface
The capability value answered, such as 5L or 12L.Camera, which captures software, can capture, save the image of instant of detonation.
(5) glass test container 14 is replaced: for being difficult to the substance quenched, needing bigger container or stronger ignition power
The phenomenon that pressure is preferably to observe flame propagation, it is therefore desirable to which glass test container 14 is replaced.
Tested using the explosion limit tester of the present embodiment, can operating display 11 be arranged content of the test, test
Process includes:
(1) select sample properties for gas, solid or liquid.
(2) glass test container 14 and pipeline are cleaned using oilless vacuum pump 3, is divided into and vacuumizes and two steps of air inlet.
Vacuumize be the air pressure in glass test container 14 is extracted into 1KPa or less remove glass test container 14 in remaining sample or
Exhaust gas.Air inlet is to obtain air from ambient enviroment the air pressure in glass test container 14 is made to be restored to normal pressure, and the mode of air inlet has
Two kinds, one is surrounding airs, and one is compressed airs.
(3) temperature adjustment.When preset temperature is higher than room temperature, infrared heater 7 is heated, until reaching test temperature；When default
When temperature is lower than room temperature, start compression refigerating machine 22, realizes that high speed stablizes intelligent temperature control.Hot test cannot be direct after having carried out
Low-temperature test is carried out, should first wait temperature in glass test container 14 consistent with room temperature；Otherwise similarly.Test temperature can be -10
~200 DEG C.
(4) it vacuumizes.After the completion of temperature adjustment, oilless vacuum pump 3 starts to vacuumize glass test container 14 and pipeline,
When glass test container 14 and channel interior pressure reach preset value, oilless vacuum pump 3 stops working, and vacuumizes completion.
(5) magnetic stirrer 17 is loaded and opened into glass test container 14, is sufficiently mixed sample material.For liquid
Body sample, after sample is put into, liquid vaporizes in glass test container 14.At this time testing crew can according to actual test come
It chooses whether to need to completely vaporize.
(6) temperature adjustment again.Secondary temperature-compensating controls temperature in glass test container 14 in preset temperature.Temperature arrives
Up to after preset temperature, stop stirring.
(7) it lights a fire.When automatic ignition is adjusted to " off ", remote controler starting ignition can be passed through.If the 1st igniting " non-point
Combustion ", testing crew carry out the 2nd igniting by remote controler, if still " unignited ", off-test.When automatic ignition is adjusted to
When " on ", when explosion limit tester runs to this step, automatic initial igniter after countdown 10s, and test is reminded in buzzing
Personnel pay attention to protecting.If testing crew thinks that igniting is not lighted, can be carried out again according to the prompting frame on display screen 11
Igniting.
(8) detection lid folder 13.Test may cause strong explosive reaction to cause pressure in glass test container 14 prominent
Increasing makes the lid being clipped on glass test container 14 folder 13 be detached from two root posts, at this point, program has prompting frame prompting, testing crew
Cover frame 13 need to only be buckled again.If testing crew determines flame and do not propagate, can also be reminded according to prompting frame
Carry out corresponding operation.
(9) it cleans.Off-test and then it is secondary enter vacuumize cleaning process, to glass test container 14 and pipeline into
Row cleaning, guarantee test personnel safety.
(10) report is generated.Camera 15 will record sample combustion state, by result input panel after being observed by user
11.If dropping by the wayside test, testing crew may choose whether food preservation test data.After completing above-mentioned sequence of operations, system is certainly
It is dynamic to generate report.
(11) operating display 11 can check data.
In addition, it should also be understood that, those skilled in the art can be right after having read the foregoing description content of the utility model
The utility model makes various changes or modifications, and such equivalent forms equally fall within model defined by the application the appended claims
It encloses.
Claims (10)
1. a kind of explosion limit tester, including experimental rig and control mechanism, the experimental rig includes with lid folder
Glass test container, high-frequency igniter and heat-preservation liner, control mechanism include infrared heater, compression refigerating machine, pressure sensing
Device and vacuum pump, which is characterized in that the lid folder is equipped with temperature sensor, and glass test container is placed in heat-preservation liner,
The ignitor of high-frequency igniter is set in glass test container；The infrared heater is set to heat-preservation liner bottom, compression
Refrigeration machine cooling heat-preservation liner, the pressure sensor, vacuum pump and glass test container connect.
2. explosion limit tester according to claim 1, which is characterized in that the lid folder is equipped with liquid injection
Mouthful, testing liquid passes through fluid injection opening implantation glass test container.
3. explosion limit tester according to claim 1, which is characterized in that the lid folder is equipped with humidity sensor
Device monitors the humidity in glass test container.
4. explosion limit tester according to claim 1, which is characterized in that the glass test container and pressure passes
Explosion-proof solenoid valve is connected between sensor.
5. explosion limit tester according to claim 1, which is characterized in that the glass test container passes sequentially through
Solenoid valve, solenoid valve, pressure maintaining valve and filter are connected to atmosphere or gas cylinder.
6. explosion limit tester according to claim 1, which is characterized in that the glass test container uses high boron
Silicate glass material is made.
7. explosion limit tester according to claim 1, which is characterized in that the heat-preservation liner is equipped with to be connected with computer
The camera connect monitors glass test container.
8. explosion limit tester according to claim 1, which is characterized in that the glass test container band is magnetic
Blender.
9. explosion limit tester according to claim 1, which is characterized in that the control mechanism further includes that emergency stop is opened
Pass and self-lock switch.
10. explosion limit tester according to claim 1, which is characterized in that the heat-preservation liner has relief valve,
Heat-preservation liner front is equipped with observation window, and rear portion is equipped with explosion proof door.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920125213.5U CN209707427U (en) | 2019-01-24 | 2019-01-24 | A kind of explosion limit tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920125213.5U CN209707427U (en) | 2019-01-24 | 2019-01-24 | A kind of explosion limit tester |
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| Publication Number | Publication Date |
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| CN209707427U true CN209707427U (en) | 2019-11-29 |
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ID=68641335
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| CN201920125213.5U Active CN209707427U (en) | 2019-01-24 | 2019-01-24 | A kind of explosion limit tester |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111272816A (en) * | 2020-03-15 | 2020-06-12 | 大连理工大学 | Multi-element combustible liquid steam explosion lower limit testing device under high-temperature and high-pressure conditions and working mode |
| CN112858386A (en) * | 2021-01-07 | 2021-05-28 | 太原工业学院 | Critical explosion temperature testing container for explosive material solution |
| CN116296023A (en) * | 2023-05-17 | 2023-06-23 | 甘肃碣石实验设备有限公司 | Explosion experiment pressure detection assembly, device and method |
| CN117233209A (en) * | 2023-09-15 | 2023-12-15 | 广州海关技术中心 | Lithium battery thermal runaway gas explosion limit device, system and use method |
-
2019
- 2019-01-24 CN CN201920125213.5U patent/CN209707427U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111272816A (en) * | 2020-03-15 | 2020-06-12 | 大连理工大学 | Multi-element combustible liquid steam explosion lower limit testing device under high-temperature and high-pressure conditions and working mode |
| CN112858386A (en) * | 2021-01-07 | 2021-05-28 | 太原工业学院 | Critical explosion temperature testing container for explosive material solution |
| CN116296023A (en) * | 2023-05-17 | 2023-06-23 | 甘肃碣石实验设备有限公司 | Explosion experiment pressure detection assembly, device and method |
| CN116296023B (en) * | 2023-05-17 | 2024-01-23 | 甘肃碣石实验设备有限公司 | Explosion experiment pressure detection assembly, device and method |
| CN117233209A (en) * | 2023-09-15 | 2023-12-15 | 广州海关技术中心 | Lithium battery thermal runaway gas explosion limit device, system and use method |
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