CN206671239U - A kind of device for determining the combustible gas explosion limit - Google Patents
A kind of device for determining the combustible gas explosion limit Download PDFInfo
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- CN206671239U CN206671239U CN201720325054.4U CN201720325054U CN206671239U CN 206671239 U CN206671239 U CN 206671239U CN 201720325054 U CN201720325054 U CN 201720325054U CN 206671239 U CN206671239 U CN 206671239U
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- reaction tube
- magnetic valve
- explosion limit
- combustible gas
- determining
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Abstract
The utility model discloses it is a kind of determine the combustible gas explosion limit device, including flame-arrester vent plug, reaction tube, multiple flame sensing units, platinum sensor, sparking electrode, without oil circulating pump, vacuum flapper valve, transformer, vavuum pump one, vavuum pump two, magnetic valve one, magnetic valve two, magnetic valve three, pressure sensor and gas inlet；Flame-arrester vent plug is arranged on the upper end of reaction tube, multiple flame sensing units are evenly distributed on the tube wall of reaction tube, platinum sensor is arranged on the middle position of reaction tube, sparking electrode is arranged on the bottom of reaction tube, lower end and top connection without oil circulating pump and reaction tube, vacuum flapper valve is arranged on the bottom of reaction tube, vavuum pump one, vavuum pump two and gas inlet are connected by magnetic valve two and air communicating pipe with magnetic valve three, magnetic valve three is by air communicating pipe with being connected in the middle part of reaction tube, the utility model uses two vavuum pumps, the vacuum needed for experiment can be reached, experimental precision is high.
Description
Technical field:
It the utility model is related to a kind of gas concentration detection field, more particularly to a kind of measure combustible gas explosion limit
Device.
Background technology：
With the continuous diversified development of chemical products, various product is widely used in daily life, according to system
Daily chemical products are counted up to kind more than 80,000, and this data is also in rising drastically.And in the chemical products of majority, have perhaps
More inflammable and explosive material causes huge potential safety hazard during production and transport to the property safety of people.Explosion limit
It is to determine this dangerous important parameter, when the scope of inflammable substance explosion limit is wider, its fire risk is bigger.
The explosion limit data of all kinds of inflammable substances are solved and grasp, for having great importance in prevention peril.
Generally for single component, can be obtained by lookup data, but for the explosion limit of all kinds of mixtures, it is difficult to directly look into
Find, therefore just need a kind of measure device that can test multicomponent mixture explosion limit data.
The utility model patent that the notification number that on October 12nd, 2016, bulletin authorized is 205643224U, patent name is can
Combustion gas body explosible limit concentration determination test device, including including gas igniter and gas concentration detection apparatus, the gas
Body igniter includes pressure gauge, flame-arrester vent plug, reaction tube, intake valve, vavuum pump, sparking electrode and high voltage power supply；The gas
Concentration detection apparatus includes stop valve, air communicating pipe, gas concentration detector and gas circulator；The top of the reaction tube
It is connected with bottom with flame-arrester vent plug, the top half of the reaction tube is connected with pressure gauge, intake valve and vavuum pump, the reaction
The latter half of pipe is connected with sparking electrode and air communicating pipe, and the both ends of the air communicating pipe are respectively close to sparking electrode
Without being contacted with sparking electrode, the stop valve, gas circulator and gas concentration detector pass through gas connection at positive and negative both ends
Pipe connects.Although the device can measure the explosion limit of gas, the vavuum pump only has one, and use for a long time can not be protected
The precision of vacuum is demonstrate,proved, so as to cause experimental result certain error to be present, and the device lacks safety measure, may give work
Danger is brought as personnel.
Utility model content：
In order to overcome above-mentioned deficiency, the purpose of this utility model is to provide a kind of measure of the combustible gas explosion limit
Device, not only test result precision is high and simple in construction, safe for the measure device.
In order to solve the above technical problems, the technical solution adopted in the utility model is：A kind of combustible gas explosion limit
Measure device, including flame-arrester vent plug, reaction tube, multiple flame sensing units, platinum sensor, sparking electrode, oil-free circulation
Pump, vacuum flapper valve, transformer, vavuum pump one, vavuum pump two, magnetic valve one, magnetic valve two, magnetic valve three, pressure sensor
And gas inlet；The flame-arrester vent plug is arranged on the upper end of reaction tube, and the multiple flame sensing unit is evenly distributed in instead
Should be on the tube wall of pipe, the platinum sensor is arranged on the middle position of reaction tube, and the sparking electrode is arranged on reaction tube
Bottom, and be connected with transformer, the no oil circulating pump by the lower end of magnetic valve one and air communicating pipe and reaction tube and
Top connects, and the vacuum flapper valve is arranged on the bottom of reaction tube, the vavuum pump one, vavuum pump two and gas inlet
It is connected by magnetic valve two and air communicating pipe with magnetic valve three, the magnetic valve three passes through in air communicating pipe and reaction tube
The injection port connection in portion, the pressure sensor are arranged on the side of magnetic valve three.
The material of above-mentioned reaction tube is hard glass, and pipe range is 1400mm ± 50mm, and bore is 60mm ± 5mm, tube wall
Thickness >=2mm.
Above-mentioned sparking electrode is in the center of reaction tube cross section, and sparking electrode to reaction bottom of the tube distance >=
100mm, the spacing of sparking electrode is 3mm-4mm.
Above-mentioned gas air inlet has 4.
Above-mentioned flame sensing unit is thermocouple sensor, or flame sensor.
Said determination device also includes the CCD shootings for being used for distant surveillance measure phenomenon, and far distance controlled measure
The control system of device.
Said determination device is arranged on and can be warming up in 80 DEG C of insulating box, and the insulating box is respectively arranged in the front and the rear with bilayer
Door, one layer is safety glass, and another layer is lucite.
Said determination device also includes centrifugal blower one and centrifugal blower two, and the centrifugal blower one and centrifugal blower two are equal
In the insulating box, and the outside of the reaction tube is arranged on, the front end of the centrifugal blower one is equipped with heater strip.
Limit switches are installed on above-mentioned two storied gate.
The beneficial effects of the utility model：
1st, the utility model is vacuumized using two vavuum pumps (vavuum pump one and vavuum pump two) to measure device, and one
Platform progress is rough to be vacuumized, and another carries out vacuumizing for precision, can reach the required vacuum of experiment, experimental precision
It is high.
2nd, the explosion limit that the utility model can be tested under room temperature to 80 DEG C of different temperatures, in order that insulating box reaction tubes
Equalized temperature, purged using two-way blower fan (centrifugal blower one and centrifugal blower two), centrifugal blower one is put using front end
The mode for having heater strip carries out temperature control, and centrifugation wind tight two directly purging makes the equalized temperature in insulating box, and makes hot blast
Circulation, allows the upper and lower temperature difference of reaction tube to only have 0.4 DEG C.
3rd, the utility model uniformly sets multiple flame sensing unit (thermoelectricity along its length on the tube wall of reaction tube
Even sensor or flame sensor), voluntarily judge whether flame is propagated by control system, improve measuring accuracy.
3rd, the utility model measure device is arranged in insulating box, and insulating box is respectively arranged in the front and the rear with two storied gate, and one layer be
Safety glass, another layer are lucite, can so play the work that distant surveillance is tested and protected to staff
With.
Brief description of the drawings:
Specific embodiment of the present utility model is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is the structure chart of the measure device of the utility model combustible gas explosion limit.
Description of reference numerals：1 flame-arrester vent plug, 2 reaction tubes, 3 flame sensing units, 4 platinum sensors, 5 sparking electrodes, 6
Without oil circulating pump, 7 vacuum flapper valves, 8 transformers, 9 vavuum pumps one, 10 vavuum pumps two, 11 magnetic valves one, 12 magnetic valves two, 13
Magnetic valve three, 14 pressure sensors, 15 display screens, 16 centrifugal blowers one, 17 centrifugal blowers two, 18 heater strips.
Embodiment:
A kind of measure device of the combustible gas explosion limit as described in Figure 1, including flame-arrester vent plug 1, reaction tube 2, Duo Gehuo
Flame sensing unit 3, platinum sensor 4, sparking electrode 5, without oil circulating pump 6, vacuum flapper valve 7, transformer 8, vavuum pump one
9th, vavuum pump 2 10, magnetic valve 1, magnetic valve 2 12, magnetic valve 3 13, pressure sensor 14 and gas inlet；The peace
Full plug 1 is arranged on the upper end of reaction tube 2, and the multiple flame sensing unit 3 is evenly distributed on the tube wall of reaction tube 2, institute
The middle position that platinum sensor 4 is arranged on reaction tube 2 is stated, the sparking electrode 5 is arranged on the bottom of reaction tube 2, and with
Transformer 8 is connected, and the no oil circulating pump 6 is connected by magnetic valve 1 and air communicating pipe with the lower end of reaction tube 2 and top
Connect, the vacuum flapper valve 7 is arranged on the bottom of reaction tube 2, the vavuum pump 1, vavuum pump 2 10 and gas inlet
It is connected by magnetic valve 2 12 and air communicating pipe with magnetic valve 3 13, the magnetic valve 3 13 is by air communicating pipe and instead
Should the middle part of pipe 2 injection port connection, the pressure sensor 14 is arranged on the side of magnetic valve 3 13.
The utility model is vacuumized, one using two vavuum pumps (vavuum pump 1 and vavuum pump 2 10) to device
Progress is rough to be vacuumized, and another carries out vacuumizing for precision, and to reach required vacuum, experimental precision is high；And
One end of reaction tube 2 is provided with flame-arrester vent plug 1, when being tested, when pressure rise, can carry out pressure release automatically.
The measure device is arranged on and can be warming up in 80 DEG C of insulating box, and the insulating box is respectively arranged in the front and the rear with bilayer
Door, one layer is safety glass, and another layer is lucite, and limit switch is provided with the basis of insulating box two storied gate, so
Not only can be with viewing test, and the personal safety to staff is protected.
The utility model is mounted with that two-way centrifuges wind in order that the equalized temperature of insulating box reaction tubes 2 in insulating box
Machine carries out outer circulation (centrifugal blower 1 and centrifugal blower 2 17), and centrifugal blower 1 is equipped with the side of heater strip 18 using front end
Formula carries out temperature control, and the directly purging of centrifugal blower 2 17 makes the equalized temperature in insulating box, upper and lower temperature difference is only had 0.4 DEG C.
The determination step for carrying out the combustible gas explosion limit using measure device of the present utility model includes：
The first step：First check for determining the air-tightness of device, opened successively by control system and vavuum pump 1 or vacuum
The magnetic valve 2 12 that pump 2 10 connects, and magnetic valve 3 13 are vacuumized, when be evacuated to≤667Pa vacuum when, then
Termination of pumping, the pressure of pressure sensor 14 is down to≤267Pa after 5min, then it is assumed that seal meets the requirements；If necessary to temperature control, then
Experimental temperature needed for being set by centrifugal blower.
Second step：Gas inlet of the present utility model has four, and one of them is used to be filled with air.Opening is entered with gas
The magnetic valve 2 12 of gas port connection, distribution preparation is carried out using partial pressure method and (fuel gas is carried out according to the perfect gas law of partial pressure
Proportioning, using the intrinsic standoff ratio in each gas component and air mixture as volume ratio progress distribution preparation)；Open oil-free circulation
Pump 6 is stirred, mixing time 5-10min, allows gas to enough be uniformly dispersed in the whole cavity of reaction tube 2.
3rd step：After stopping stirring, magnetic valve 1 is closed, opens vacuum flapper valve 7, then igniting (can pass through remote control
Also can be controlled by software), record experimental phenomena is imaged by CCD.
Test judges whether to reach UEL and LEL by way of range estimation, is seen by display screen 15
Examine, think to explode when there is following phenomenon：1) when flame it is very fast propagate to tube top；2) slowly passed with certain speed
Broadcast；3) occur flame around sparking electrode and then extinguish, show explosion limit in this concentration annex, in this case,
Experiment 5 times is at least repeated, flame propagation once occurs.By the volume integral for measuring closest to flame propagation and not propagating at 2 points
Number averaged is explosion limit value.
4th step：After experiment terminates, using clean air cleaning experiment device.
The temperature change and flame propagation velocity that fire endurance period is propagated after monitors ignition for convenience, in reaction tube 2
Multiple flame sensing units 3 (thermocouple sensor or flame sensor), this reality are uniformly provided with tube wall along its length
6 thermocouple sensors are preferably provided with the tube wall of reaction tube 2 with new, for judging whether burning is carried out.
Claims (9)
- A kind of 1. device for determining the combustible gas explosion limit, it is characterised in that：Including flame-arrester vent plug (1), reaction tube (2), more Individual flame sensing unit (3), platinum sensor (4), sparking electrode (5), without oil circulating pump (6), vacuum flapper valve (7), become Depressor (8), vavuum pump one (9), vavuum pump two (10), magnetic valve one (11), magnetic valve two (12), magnetic valve three (13), pressure Sensor (14) and gas inlet；The flame-arrester vent plug (1) is arranged on the upper end of reaction tube (2), and the multiple flame sensing is single First (3) are evenly distributed on the tube wall of reaction tube (2), and the platinum sensor (4) is arranged on the central position of reaction tube (2) Put, the sparking electrode (5) is arranged on the bottom of reaction tube (2), and is connected with transformer (8), and the no oil circulating pump (6) is logical The lower end and top for crossing magnetic valve one (11) and air communicating pipe and reaction tube (2) are connected, and the vacuum flapper valve (7) is arranged on The bottom of reaction tube (2), the vavuum pump one (9), vavuum pump two (10) and gas inlet pass through magnetic valve two (12) It is connected with air communicating pipe with magnetic valve three (13), the magnetic valve three (13) passes through air communicating pipe and reaction tube (2) middle part Injection port connection, the pressure sensor (14) be arranged on magnetic valve three (13) side.
- A kind of 2. device for determining the combustible gas explosion limit according to claim 1, it is characterised in that：The reaction The material of pipe (2) is hard glass, and pipe range is 1400mm ± 50mm, and bore is 60mm ± 5mm, pipe thickness >=2mm.
- A kind of 3. device for determining the combustible gas explosion limit according to claim 1, it is characterised in that：The electric discharge Electrode (5) is in the center of reaction tube (2) cross section, and sparking electrode (5) arrives the distance >=100mm of reaction tube (2) bottom, puts The spacing of electrode (5) is 3mm-4mm.
- A kind of 4. device for determining the combustible gas explosion limit according to claim 1, it is characterised in that：The gas Air inlet has 4.
- A kind of 5. device for determining the combustible gas explosion limit according to claim 1, it is characterised in that：The flame Sensing unit (3) is thermocouple sensor, or flame sensor.
- A kind of 6. device for determining the combustible gas explosion limit according to claim 1, it is characterised in that：The measure Device also includes the CCD shootings for being used for distant surveillance measure phenomenon, and the control system of far distance controlled measure device.
- A kind of 7. device of measure combustible gas explosion limit according to claim any one of 1-6, it is characterised in that： The measure device is arranged on and can be warming up in 80 DEG C of insulating box, and the insulating box is respectively arranged in the front and the rear with two storied gate, and one layer is Safety glass, another layer are lucite.
- A kind of 8. device for determining the combustible gas explosion limit according to claim 7, it is characterised in that：The measure Device also includes centrifugal blower one (16) and centrifugal blower two (17), and the centrifugal blower one (16) and centrifugal blower two (17) are equal In the insulating box, and the outside of the reaction tube (2) is arranged on, the front end of the centrifugal blower one (16), which is equipped with, to be added Heated filament (18).
- A kind of 9. device for determining the combustible gas explosion limit according to claim 7, it is characterised in that：The bilayer Limit switches are installed on door.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720325054.4U CN206671239U (en) | 2017-03-30 | 2017-03-30 | A kind of device for determining the combustible gas explosion limit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720325054.4U CN206671239U (en) | 2017-03-30 | 2017-03-30 | A kind of device for determining the combustible gas explosion limit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206671239U true CN206671239U (en) | 2017-11-24 |
Family
ID=60366312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720325054.4U Expired - Fee Related CN206671239U (en) | 2017-03-30 | 2017-03-30 | A kind of device for determining the combustible gas explosion limit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206671239U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109085200A (en) * | 2018-08-13 | 2018-12-25 | 中国矿业大学(北京) | A kind of measuring device and method of the big tubulose coal-dust explosion identification length of flame |
| CN111307862A (en) * | 2020-04-03 | 2020-06-19 | 杭州格致检测科技有限公司 | Gas thermal safety testing method |
| CN112034088A (en) * | 2020-09-15 | 2020-12-04 | 国网河南省电力公司检修公司 | Transformer fault gas monitoring equipment |
-
2017
- 2017-03-30 CN CN201720325054.4U patent/CN206671239U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109085200A (en) * | 2018-08-13 | 2018-12-25 | 中国矿业大学(北京) | A kind of measuring device and method of the big tubulose coal-dust explosion identification length of flame |
| CN109085200B (en) * | 2018-08-13 | 2020-11-10 | 中国矿业大学(北京) | Method for measuring flame length for explosive identification of large tubular coal dust |
| CN111307862A (en) * | 2020-04-03 | 2020-06-19 | 杭州格致检测科技有限公司 | Gas thermal safety testing method |
| CN111307862B (en) * | 2020-04-03 | 2022-10-28 | 杭州格致检测科技有限公司 | Gas thermal safety testing method |
| CN112034088A (en) * | 2020-09-15 | 2020-12-04 | 国网河南省电力公司检修公司 | Transformer fault gas monitoring equipment |
| CN112034088B (en) * | 2020-09-15 | 2022-07-01 | 国网河南省电力公司超高压公司 | Transformer fault gas monitoring equipment |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171124 |
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| CF01 | Termination of patent right due to non-payment of annual fee |