CN203396771U - Testing device for laminar flame propagation rate of dust-air mixture - Google Patents
Testing device for laminar flame propagation rate of dust-air mixture Download PDFInfo
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- CN203396771U CN203396771U CN201320403685.5U CN201320403685U CN203396771U CN 203396771 U CN203396771 U CN 203396771U CN 201320403685 U CN201320403685 U CN 201320403685U CN 203396771 U CN203396771 U CN 203396771U
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- air mixture
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Abstract
The utility model discloses a testing device for a laminar flame propagation rate of a dust-air mixture. The testing device is characterized by being provided with an automatic cleaning system which can be used for cleaning a transparent high-temperature-resisting pipe after an experiment is finished so as to provide an experiment foundation for accurately determining the laminar flame propagation rate of the dust-air mixture. The device can be used for adjusting powder amounts, powder varieties, varieties of cleaning devices, operation manners and the like according to the requirements; the device is flexible to use. The device disclosed by the utility model is reasonable in structure; used materials are easily available; the testing device is stable in working performance and simple to operate, can realize repeated operation and is suitable for the requirements of large-scale industrial production tests.
Description
Technical field
The utility model belongs to safety engineering technical field of measurement and test, is specifically related to the experiment test device of disaster combustion.
Background technology
When combustible dust and air mixture reach its explosion limits, under the condition existing at extraneous burning things which may cause a fire disaster, very easily blast.Dust explosion is one of modal blast form in commercial production, coal dust, metallic dust, fibre dust, organism dust even agricultural byproducts cereal, flour etc. all very easily cause dust explosion, cause extremely serious casualties and property loss, there is great danger.
Rate of flame propagation is the speed that flame front moves towards unburned part along common normal direction, is one of important parameter of weighing combustible mixture bursting strength.When the potpourri of combustible dust and air is during in laminar motion, it is the principal mode that dust explosion incipient flame is propagated that laminar flame is propagated, so Accurate Measurement dust-air mixture laminar flame propagation rate is carry out the development of dust explosion explosion suppressor basic and crucial.The device that the device of measuring at present dust-air mixture laminar flame propagation rate is reported in " Grain Dust blast and control " (" grain dust explosion and control ") book as: people such as Piotrt Wolanski, this device can be measured the Grain Dust laminar flame propagation rate of different-grain diameter, but after finishing, experiment clears up comparatively difficulty, dust and products of combustion adhere to after tube wall, affect device and recycle.Laminar flame propagation rate when this experimental provision can be used for measuring combustible dust and air mixture burning, and experiment can carry out Automatic clearance to device after finishing, and can be and studies dust explosion mechanism, and developing effective explosion suppression device provides theory support.
Utility model content
The purpose of this utility model is to provide a kind of proving installation of dust-air mixture laminar flame propagation rate, to make up the deficiencies in the prior art, for research dust explosion mechanism of flame propagation, development explosion suppression device provides experiment to support, the needs that meet experiment and produce.
The proving installation of a kind of dust-air mixture of the utility model laminar flame propagation rate, comprises flame propagation system, powder sprinkling system, cleaning systems and measurement mechanism; Described flame propagation system is comprised of transparent high temperature resistant pipe, portfire, pallet a; Pallet a is positioned at transparent high temperature resistant pipe top; Transparent high temperature resistant tube wall has scale mark; On transparent high temperature resistant pipe top, be powder sprinkling system 7, it is screen cloth in transparent high temperature resistant pipe upper opening place that powder sprays system bits, and sieve number, for being less than 300 orders, arranges electromagnetic shaker in powder sprinkling system; Cleaning systems consist of Clean Brush for cleaning, gearing; Measurement mechanism is video camera, schlieren etc.
it is characterized in that: auto cleaning system is set, and Clean Brush for cleaning can move up and down in high-temperature resistant tube, and device is carried out to automated cleaning.
When the utility model device is used, according to requirement of experiment, a certain amount of powder is positioned on screen cloth, measurement mechanism is set to desired location, starts video camera, Vib. and portfire, wait to occur the flame of propagation continuously, close portfire and Vib., during fray-out of flame, close video camera, treat that transparent high temperature resistant pipe is cooled to room temperature, start cleaning systems, transparent high temperature resistant pipe is cleaned.
The proving installation of a kind of dust-air mixture of the utility model laminar flame propagation rate is compared with existing proving installation, because the utility model has increased cleaning systems, after finishing, experiment can carry out automated cleaning to transparent high temperature resistant pipe, overcoming prior art measures after rate of flame propagation, the blackening of transparent high temperature resistant tube wall face, thus make the shortcoming that subsequent experimental cannot accurate recording rate of flame propagation; This device can be adjusted powder amount, powder kind, cleaning device classification, the method for operation etc. as required, uses more flexible.The utility model apparatus structure is reasonable, and the material using is easy to get, stable work in work, simple to operate, can realize repeatedly and operating, adapt to the needs of large-scale industrial production test.
Accompanying drawing explanation
Fig. 1 is the front elevation of the proving installation of a kind of dust-air mixture of the utility model laminar flame propagation rate.
Fig. 2 is the front elevation of the utility model experimental provision cleaning systems.
Fig. 3 is the arrangenent diagram of the utility model experimental provision column.
Fig. 4 is the side view of the utility model experimental provision Clean Brush for cleaning.
Fig. 5 is the vertical view of the utility model experimental provision bracing frame.
Embodiment
Fig. 1 is the front elevation of the proving installation of a kind of dust-air mixture of the utility model laminar flame propagation rate; Fig. 2 is the front elevation of the utility model experimental provision cleaning systems; Fig. 3 is the arrangenent diagram of the utility model experimental provision column; Fig. 4 is the side view of the utility model experimental provision Clean Brush for cleaning; Fig. 5 is the vertical view of the utility model experimental provision bracing frame.As shown in the above figures, the proving installation of a kind of dust-air mixture of the utility model laminar flame propagation rate, comprises flame propagation system 16, powder sprinkling system 7, cleaning systems 36 and measurement mechanism 3, described flame propagation system 16 is comprised of transparent quartz tube 17, portfire 19, pallet a20, transparent quartz tube 17 internal diameters are 280mm, and length is 3m, by the quartz glass that 2mm is thick, are made, and are Accurate Measurement flame height, in transparent quartz glass tube wall one side, scale mark 18 are set, and the minimum analytical unit of scale mark 18 is 10mm, for preventing that the interior powder of transparent quartz tube 17 from dropping to ground, in transparent quartz tube 17 bottoms, pallet a20 is set, pallet a20 adopts stainless steel to make, internal diameter is 284mm, and external diameter is 288mm, and limit wall thickness is 2mm, be highly 0.5m, pallet a20 top edge is close in transparent quartz tube 17 bottoms, for fixing transparent quartz tube 17 position, and make it in vacant state, in transparent quartz tube 17 1 sides, bracing frame 26 is set, bracing frame 26 is comprised of vertical supporting bar 25 and transverse support bar 13, vertical supporting bar 25 is fixed on lower wall surface, be highly 4.5m, length and width are 200mm, the cast of employing reinforced concrete, vertical supporting bar 25 from top to bottom 2m At The Height and from bottom to top 1.5m At The Height two height are set is respectively 5cm, the degree of depth is the groove 22 of 1cm, it is 2cm reinforcement fabrication that transverse support bar 13 adopts diameter, one side is groove 22 inside that hollow circular ring 23 is positioned over vertical supporting bar 25, can be with vertical supporting bar 25Wei center of circle rotating 360 degrees, a side away from vertical supporting bar 25 is that inner mast is with the clip 14 of asbestos blanket, can be by adjusting the screw 15 on clip 14, control the size of clip 14, in order to fixing transparent quartz tube 17, being fixed on transparent quartz tube 17 in transverse support bar 13 can be along with transverse support bar 13 support bar 25 rotating 360 degrees along the longitudinal, between vertical supporting bar 25 and transparent quartz tube 17, transverse support bar 13 both sides respectively arrange a column 24, column 24 bottoms are propulsion system 21, column 24 can move back and forth along the direction perpendicular to transverse support bar 13 under bottom propulsion system 21 drive, thereby drive transverse support bar 13 along the longitudinal support bar 25 is carried out circular motion, and then drive transparent quartz tube 17 motions, portfire 19 is positioned at transparent quartz tube 17 bottoms, pallet a20 top, is spark ignition, on transparent quartz tube 17 tops, be powder sprinkling system 7, powder sprinkling system 7 consists of sieve 9 and electromagnetic vibrator 10, by suspension strop 6, connects, and suspension strop 6 strides across top pulleys 27, and the other end is fixed on wall, sieve 9 bottoms are screen cloth 12, around frame internal diameter is 285mm, external diameter is 291mm, be highly 10cm, for stainless steel, make, screen cloth 12 diameters are 275mm, the center of circle and transparent quartz tube 17 centers of circle are on same perpendicular bisector, screen cloth 12 is 600 orders, and frame top arranges gland bonnet 8, and powder is positioned over sieve 9 inside, electromagnetic vibrator 10 is set on sieve 9, powder is slowly sprayed in transparent quartz tube 17, form suspension powder, for making to test rear device, be convenient to cleaning, keep transparent quartz tube 17 clean, the utility model arranges cleaning systems 36, and cleaning systems 36 consist of Clean Brush for cleaning 34, gearing 40, Clean Brush for cleaning 34 is cylindrical structure, and the right cylinder 35 that middle part is hollow adopts high-temperature resistance plastice to make, and diameter is 100mm, is highly 0.3m, and there is synthetic plastic 38 on right cylinder 35 surfaces of hollow, and length is 220mm, gearing 40 is by gear 21, chain 33, motor 32 forms, gear a21a is installed on height above ground level 0.1m place wall, gear a21a is driving wheel, be connected with motor 32, motor 32 can positive and negatively rotate, gear b21b is installed on the wall at transparent quartz tube 17 tops, gear b21b is engaged wheel, roller c21c is installed on transparent quartz tube 17 ground, lower tray b41 bottom, chain 33 total lengths are 18m, on gear a21a bottom chain 33, the clamp a37a that a width is greater than Clean Brush for cleaning 34 inner hollow cylinder diameters is set, when chain 33 moves downward under the stopping of clamp a37a, Clean Brush for cleaning 34 can move downward under the affecting of chain 33, transparent quartz tube 17 is cleaned, at the end setting of vertical chain 33 and the measure-alike clamp b37b of clamp a37a, when Clean Brush for cleaning 34 cleans out, when chain 33 moves upward, under the stopping of clamp b37b, Clean Brush for cleaning 34 can move upward, clamp b37b place chain 33 is can disrupted configuration, in transparent quartz tube 17 bottoms, pallet b41 is set, pallet b41 is highly 0.35m, internal diameter is 320mm, top arranges cover plate 45, and to prevent that the dust causing after Clean Brush for cleaning 34 is fallen by transparent quartz tube 17 from splashing, cover plate 45 external diameters are 320mm, it is the macropore 44 of 285mm that there is diameter at middle part, transparent quartz tube 17 can pass cover plate 45, and it is the aperture 43 of 2cm that there is diameter at pallet b41 bottom centre place, and chain 33 can pass aperture 43, there is the leg 29 of height 0.2m at place, pallet b41Si Ge angle, and roller c21c is installed on leg 29 middle parts, measurement mechanism 3 is high-speed camera 4, high-speed camera 4, at the lateral extent transparent quartz tube 17 2m places away from vertical supporting bar 25, adopts tripod 2 to support, and setting height(from bottom) is 2m, for real time record transparent quartz tube 17 internal flame positions.
In experimentation, start column 24 bottom propulsion system 21, make transparent quartz tube 17 be positioned at Clean Brush for cleaning 34 bottoms, close propulsion system 21, loosen suspension strop 6, powder sprinkling system 7 is slowly fallen, 3L particle diameter is less than to the dry starch of 23 μ m and is positioned in sieve 9, cover gland bonnet 8, tension suspension strop 6, make powder sprinkling system 7 rise to original height, fixedly suspension strop 6 one end are to metope, again start propulsion system 21, transparent quartz tube 17 is positioned under powder sprinkling system 7, high-speed camera 4 is placed in to lateral extent transparent quartz tube 17 2m away from vertical supporting bar 25, is highly 2m place, adopts tripod 2 to support, open electromagnetic vibrator 10, high-speed camera 4, when observing powder and drop to transparent quartz tube 17 bottom, starting ignition device 19, when starting to occur flame, close electromagnetic vibrator 10, when flame starts to propagate, close portfire 19, adopt high-speed camera 4 to record flame propagation process, after fray-out of flame, closing high-speed video camera 4, approach after normal temperature until transparent quartz tube 17 is cooling, starting column 24 bottoms is that propulsion system 21 make transparent quartz tube 17 be positioned at Clean Brush for cleaning 34 bottoms, moisturizing cleansing hairbrush 34, starter motor 32, chain 33 is fallen over against transparent quartz tube 17 middle parts, after pallet b41 bottom aperture 43 is passed in chain 33 bottoms, stop motor 32, chain 33 one end through aperture 43 is connected with the other end, starter motor 32, Clean Brush for cleaning 34 is from top to bottom moved, cleaning transparent quartz tube 17 inside, until Clean Brush for cleaning 34 drops in pallet b41, reverse motors 32, when chain 33 seam crossings are positioned at aperture 43 place, stop motor 32, disconnect chain 33, starter motor 32 again, make upwards slowly motion of Clean Brush for cleaning 34, until arrive transparent quartz tube 17 tops, disable motor 32, according to high-speed camera 4 document images, corresponding transparent quartz tube 17 wall scales, can calculate rate of flame propagation, the present embodiment can simulated determination starch-lamina air flow rate of flame propagation, and transparent quartz tube 17 is carried out to automated cleaning.
embodiment 2:
In the present embodiment, the gearing 40 of cleaning systems 36 can be set, at Clean Brush for cleaning top, metope arranges pulley, adopt suspension strop to make Clean Brush for cleaning 34 be suspended from below, top, in Clean Brush for cleaning 34 bottoms, increase 5kg weight, when transparent quartz tube 17 is positioned at Clean Brush for cleaning 34 bottom, loosen suspension strop, make Clean Brush for cleaning 34 under the effect of weight at the inner slow decreasing of transparent quartz tube 17, transparent quartz tube 17 is cleared up, when Clean Brush for cleaning 34 declines cause in pallet b41, from the other end, pull suspension strop, make Clean Brush for cleaning 34 risings, when hairbrush 34 to be cleaned rises to original position, fixedly suspension strop does not connect Clean Brush for cleaning 34 one end, make Clean Brush for cleaning 34 unsettled, it is identical that other are arranged at embodiment 1, the present embodiment way also can realize cleaning experimental provision.
In the present embodiment, screen cloth 12 is replaced by 1000 orders, gland bonnet 8 is replaced by pressurization and advertises device, in experiment, the interior powder of sieve 9 is blown into transparent quartz tube 17, it is identical that other are arranged at embodiment 1; The present embodiment can be measured the propagation rate of the laminar flame that dry starch that particle diameter is less than 13 μ m produces, can automated cleaning experimental provision after each experiment, to repeat experiment.
embodiment 4
In the present embodiment, Clean Brush for cleaning 34 synthetic plastic 38 are replaced by towel, moistening towel before clearing up, other are identical with embodiment 1; The present embodiment way also can realize cleaning experimental provision.
In the present embodiment, can in transparent quartz tube 17, pass into Methane with Air combination gas, by igniter 19, other are identical with embodiment 1; The present embodiment can mensurated gas composition potpourri laminar flame propagation rate, and after experiment finishes, device is carried out to Automatic clearance.
Claims (2)
1. a proving installation for dust-air mixture laminar flame propagation rate, comprises flame propagation system (16), powder sprinkling system (7), cleaning systems (36) and measurement mechanism (3); Described flame propagation system (16) is by transparent high temperature resistant pipe (17), portfire (19), pallet a(20) form; Pallet a(20) be positioned at transparent high temperature resistant pipe (17) top; On transparent high temperature resistant pipe (17) top, be powder sprinkling system (7), it is screen cloth (12) that powder sprinkling system (7) is positioned at transparent high temperature resistant pipe upper opening place, and sieve number is less than 300 orders, and electromagnetic shaker (10) is set in powder sprinkling system (7); Cleaning systems (36) consist of Clean Brush for cleaning (34), gearing (40); Measurement mechanism (3) is video camera (4);
it is characterized in that: cleaning systems (36) are set, and Clean Brush for cleaning can move up and down in high-temperature resistant tube, and device is carried out to automated cleaning.
2.
rootproving installation according to a kind of dust-air mixture laminar flame propagation rate claimed in claim 1, is characterized in that: described transparent high temperature resistant pipe (17) wall arranges scale.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320403685.5U CN203396771U (en) | 2013-07-08 | 2013-07-08 | Testing device for laminar flame propagation rate of dust-air mixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320403685.5U CN203396771U (en) | 2013-07-08 | 2013-07-08 | Testing device for laminar flame propagation rate of dust-air mixture |
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| CN203396771U true CN203396771U (en) | 2014-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320403685.5U Expired - Fee Related CN203396771U (en) | 2013-07-08 | 2013-07-08 | Testing device for laminar flame propagation rate of dust-air mixture |
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| CN (1) | CN203396771U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675021A (en) * | 2013-07-08 | 2014-03-26 | 王信群 | Testing device for propagation speed of dust-air mixture laminar flame |
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2013
- 2013-07-08 CN CN201320403685.5U patent/CN203396771U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675021A (en) * | 2013-07-08 | 2014-03-26 | 王信群 | Testing device for propagation speed of dust-air mixture laminar flame |
| CN103675021B (en) * | 2013-07-08 | 2016-08-10 | 中国计量学院 | A kind of test device of dust-air mixture laminar flame propagation rate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140115 Termination date: 20160708 |