CN201277542Y - Miniature combustion device used for testing substance combustion performance - Google Patents
Miniature combustion device used for testing substance combustion performance Download PDFInfo
- Publication number
- CN201277542Y CN201277542Y CNU2008201533041U CN200820153304U CN201277542Y CN 201277542 Y CN201277542 Y CN 201277542Y CN U2008201533041 U CNU2008201533041 U CN U2008201533041U CN 200820153304 U CN200820153304 U CN 200820153304U CN 201277542 Y CN201277542 Y CN 201277542Y
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Abstract
A mini-type combustion device for testing mass burning performances comprises a gas pot and a nozzle, and is characterized in that the nozzle comprises an external nozzle and an internal nozzle, the internal nozzle is arranged in the external nozzle, the internal nozzle is connected with the gas pot, the external nozzle is connected with an air pump, two fine metal rods are fixed at an exhaust nozzle arranged at the end of the external nozzle, an air passage system comprises an air regulating valve, a buffer pipe, an air pump, a gas regulating valve and the gas pot, and stable and fine high-temperature flame can be produced by the regulation of each valve in air passages.
Description
Technical field
The utility model relates to the testing arrangement that the burning of a kind of test substances or Detonating Characteristics are used, specifically, relate to a kind of can be at the miniature burner of confined space build-in test substance combustion or Detonating Characteristics.
Background technology
At present,, generally need particularly carry out Classification Management, therefore, need to measure burning (comprise and the firing) performance of the goods that transports the material that is transported to the various goods that have danger in order to ensure the needs of transportation safety.In addition, the test requirements document that has (for example in test tube or Dewar bottle) in limited space is tested, such test has certain requirement to combustion flame, generally comprises: miniature (gas flow is less), any direction (having certain initial velocity) and blue flame (oxidizing flame).
In the prior art, the burner that is usually used in above-mentioned flammability test is a fuel cartridge car coat type flame burner, and it mainly is made up of combustion gas gas tank, bearing and jet pipe three parts.This burner volume is little, easy to use, but because this installs jet pipe internal diameter big (about 3mm), though can produce the flame of soybean grain size, but flame is bigger, and combustion instability, can not satisfy the requirement of control flame size (than low discharge) and direction (big initial velocity) simultaneously.In addition, when flame during in confined space internal combustion, owing to do not have the input of combustion-supporting gas, flame-out easily.
Common other miniature blowtorch also only is that the volume of device is less mostly on the market, and weight is lighter, is convenient for carrying, and can not produce stable miniature flame, so, when being used for above-mentioned combustibility test, all have certain limitation.
Summary of the invention
The purpose of this utility model provide a kind of can be at the miniature burner of confined space build-in test substance combustion or Detonating Characteristics, this device can produce diameter 3～4mm, the length stable miniature flame less than 10mm.
The utility model is to realize like this, it is a kind of miniature burner that is used for the test substances combustibility, be (generally to be air with micro-combustion gas (generally using canned compressed propane) and micro-combustion-supporting gas, pump into by mini air pump) mix, can produce after lighting and stablize tiny thermal-flame.
Miniature burner described in the utility model, its formation comprises fuel cartridge and jet pipe, the formation of jet pipe comprises outer nozzle and inner nozzle, inner nozzle places outer nozzle, inner nozzle is connected with fuel cartridge, and outer nozzle is connected with air pump, and the place is fixed with two thin metal bars at the terminal spout of outer nozzle.The external diameter of outer nozzle is 1.2～1.5mm, and internal diameter is 0.8～1.0mm.The external diameter of inner nozzle is 0.5～0.7mm, and internal diameter is 0.3～0.5mm.
The flame of described miniature burner is by the air-channel system control of this device, and air-channel system comprises air control valve, separator tube, air pump, gas control valve and fuel cartridge.
Miniature burner of the present utility model adopts combustion gas and air to enter along separate routes, in the premixed of outer nozzle front end, is the high-temperature oxydation flame thereby make the flame of generation.In addition, fixing thin metal bar can play the effect of the retention flame at outer nozzle end gas spout place, makes burning not be subject to the influence of extraneous atmosphere.
Miniature burner of the present utility model can also utilize combustion-supporting gas to come cooling spray pipe, can not produce tempering phenomenon.
The using method of miniature burner of the present utility model is: check gas circuit, guarantee the air-tightness of whole device; Open the fuel cartridge valve, feed combustion gas, fire at the outer nozzle distal point; Open air pump, regulate the air door size as required and control flame; After finishing using, close the fuel cartridge valve earlier, close air pump again.
The utility model compared with prior art has the following advantages:
1, the structure miniization of miniature burner of the present utility model is particularly suitable for using in the confined space, as using in test tube or Dewar bottle.
2, miniature burner of the present utility model is to adopt the method that refires is closed in combustion gas and air pre-mixing, the flame that produces is high-temperature oxydation flame and flameholding, be not subject to the influence of extraneous atmosphere, can produce diameter 3～4mm, length stable miniature flame less than 10mm.
3, miniature burner of the present utility model utilizes combustion-supporting gas (air) cooling spray pipe, can not produce tempering phenomenon.
4, miniature burner of the present utility model is simple in structure, and processing ease can produce various flames variations as long as regulate the flow valve of combustion gas and air during use.
Description of drawings
Fig. 1 is the structural representation of a specific embodiment of the utility model.
Number in the figure is depicted as:
The thin metal bar of 1-; The 2-wire; The 3-outer nozzle; The 4-rubber neck; The threeway of 5-glass tube; The 6-inner nozzle; The 7-reducer union; The 8-air control valve; The 9-separator tube; The 10-air pump; The 11-gas control valve; 12-propane gas tank.
The specific embodiment
Below in conjunction with a specific embodiment of the present utility model the utility model is described in further detail, but the utility model is in no way limited to this embodiment.
Embodiment
By shown in Figure 1, a kind of miniature burner that is used for the test substances combustibility of the present utility model, comprise the inner nozzle 6 of importing combustion gas and the outer nozzle 3 of input air, and the air-channel system that is used to control combustion flame, the formation of air-channel system comprises air control valve 8, separator tube 9, air pump 10, gas control valve 11 and propane gas tank 12.Described inner nozzle 6 is inserted in the outer nozzle 3, fuse by glass tube threeway 5 and rubber neck 4, the air that enters from an arm of glass tube threeway 5 is communicated with the inner chamber of outer nozzle 3, the arm of glass tube threeway is tightly connected by rubber neck 4, reducer union 7, connecting line and air control valve 8, separator tube 9 and air pump 10, and the tail end of inner nozzle 6 is tightly connected by rubber neck 4, reducer union 7, connecting line and gas control valve 11 and propane gas tank 12.The anterior terminal spout place of outer nozzle 3 is with the wire 2 two thin metal bars 1 that are fastened.External diameter 0.5～the 0.7mm of described inner nozzle 6, internal diameter is 0.3～0.5mm; The external diameter of described outer nozzle 3 is 1.2～1.5mm, and internal diameter is 0.8～1.0mm.Check whole device, guarantee favorable sealing property.
During use, combustion gas by inner nozzle 6 arrive outer nozzles 3 terminal with form mist through glass tube threeway 5 and outer nozzle 3 leaked-in airs, outside nozzle is lighted outside, and the adjusting by each valve in the gas circuit can produce and stablizes tiny thermal-flame.After finishing using, close gas control valve 11 earlier, close air pump 10 again.
Use-case 1: detonation experiment
1, sample is filled in the Dewar bottle, loading height should be under the Dewar bottleneck about 20mm, the density when loading density is similar to transportation, and do not have piece group.
2, the experiment container that will load sample is positioned in the fume hood, inserts in the sample with plastics collar fixed container and with thermocouple and takes leave of top 50mm and 100mm place until two thermocouple branches.
3, check the burner air-channel system, guarantee the air-tightness of whole device.
4, open computer, open test control logging software, and every test parameters is set.
5, open gas control valve 11, feed combustion gas, light at outer nozzle 3 ends.
6, open air pump 10, air control valve 8 forms the blue flame that diameter is about 5mm, the about 20mm of length.
7, fixing point nozzles, keeping flame is from the top sample material to be heated.
If light sample in 85 minutes, record flame transmission speed after the end of waiting to burn, with fray-out of flame, stops test.
If do not light sample in 95 minutes,, stop test then with fray-out of flame.
10, close gas control valve 11 and air pump 10.
Use-case 2: inflammability (solid) test experiments
1, pressed powder or granular test specimen loosely are filled in a long 250mm, the cross section is the high 10mm of being in the triangle, wide in the mould of 20mm.
2, mould is fallen on uralite three times from the high position of 20mm, if necessary, mould must be filled once more.
3, the limiter of side is removed, and scraped off the unnecessary part in surface.
4, above mould, place one nonflammable, do not seep water, uralite that thermal conductivity is very low, again with its upset and remove mould, on uralite, form the continuous powder band of long 250mm.
5, check the burner system, guarantee the air-tightness of whole device.
6, open gas control valve 11, feed combustion gas, light combustion gas at outer nozzle 3 ends.
7, open air pump 10, air control valve 8 forms the blue flame that diameter is about 5mm.
8, with this flame to the one end direct-fire of powder band, up to powder lighted or ignition process no longer than 2min (for the powder ignition process of metal or metal alloy no longer than 5min).
Whether 9, the combustion process of 200mm in the observation sample windrow is observed it and is finished in the duration of trial (is 40min for the metal dust duration of trial) of 4min.
10, finish test, close gas control valve 11 earlier, close air pump 10 again.
Claims (5)
1, a kind of miniature burner that is used for the test substances combustibility, comprise fuel cartridge and jet pipe, it is characterized in that: the formation of described jet pipe comprises outer nozzle [3] and inner nozzle [6], inner nozzle [6] places outer nozzle [3], inner nozzle [6] is connected with fuel cartridge, and outer nozzle [3] is connected with air pump.
2, miniature burner according to claim 1 is characterized in that: the external diameter of described outer nozzle [3] is 1.2～1.5mm, and internal diameter is 0.8～1.0mm.
3, miniature burner according to claim 1 is characterized in that: the external diameter of described inner nozzle [6] is 0.5～0.7mm, and internal diameter is 0.3～0.5mm.
4, miniature burner according to claim 1 is characterized in that: the place is fixed with two thin metal bars [1] at the terminal spout of outer nozzle [3].
5, miniature burner according to claim 1, it is characterized in that: the flame of miniature burner is by the air-channel system control of this device, and described air-channel system comprises air control valve [8], separator tube [9], air pump [10], gas control valve [11] and fuel cartridge [12].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201533041U CN201277542Y (en) | 2008-09-22 | 2008-09-22 | Miniature combustion device used for testing substance combustion performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201533041U CN201277542Y (en) | 2008-09-22 | 2008-09-22 | Miniature combustion device used for testing substance combustion performance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201277542Y true CN201277542Y (en) | 2009-07-22 |
Family
ID=40895127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201533041U Expired - Lifetime CN201277542Y (en) | 2008-09-22 | 2008-09-22 | Miniature combustion device used for testing substance combustion performance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201277542Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502406A (en) * | 2014-12-17 | 2015-04-08 | 苏州泰思泰克检测仪器科技有限公司 | Flame alarming and testing process monitoring system for combustion tester |
| CN111443158A (en) * | 2020-04-02 | 2020-07-24 | 中国人民解放军国防科技大学 | Metal powder ignition combustion test device in high-temperature gas |
-
2008
- 2008-09-22 CN CNU2008201533041U patent/CN201277542Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502406A (en) * | 2014-12-17 | 2015-04-08 | 苏州泰思泰克检测仪器科技有限公司 | Flame alarming and testing process monitoring system for combustion tester |
| CN111443158A (en) * | 2020-04-02 | 2020-07-24 | 中国人民解放军国防科技大学 | Metal powder ignition combustion test device in high-temperature gas |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090722 |
|
| CX01 | Expiry of patent term |