CN103616491A - Gas and dust mixed explosion simulation testing device - Google Patents
Gas and dust mixed explosion simulation testing device Download PDFInfo
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- CN103616491A CN103616491A CN201310548721.1A CN201310548721A CN103616491A CN 103616491 A CN103616491 A CN 103616491A CN 201310548721 A CN201310548721 A CN 201310548721A CN 103616491 A CN103616491 A CN 103616491A
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Abstract
The invention discloses a gas and dust mixed explosion simulation testing device, and belongs to the field of researches on the prevention and control of coalmine disasters. The device consists of a methane gas bottle, a compressed air bottle, pressure reducing valves, electromagnetic valves, flow meters, a tee joint, a dust cavity, valves, a vacuum pump, a simulated roadway, a test rack, an explosion-proof safety valve, an ignition probe, an igniter, pressure sensors, temperature sensors, carbon monoxide sensors, a data acquirer, a high-speed camera, a triangular bracket, a computer, a connecting pipe, connecting lines, a data line and a dust sweeper. According to the device, researches on a mutual promotion relationship between gas explosion and dust explosion and evolution laws about each characteristic parameter of gas and dust mixed explosion can be made, and the device is significant for researches on the prevention and control of extra-serious coalmine disasters and accidents.
Description
Technical field
The present invention relates to prevention and control of mine disaster research field, especially relate to a kind of gas and coal dust mixed explosion simulation test device.
Background technology
In the disaster accident occurring in colliery, majority has coal dust to participate in, and the death toll that the gas explosion that wherein has coal dust to participate in causes accounts for 85%.The characteristic feature of gas and coal dust mixed explosion is, its brisance is than violent many of the blast of gas or coal dust single factors, and can there is incomplete oxidation reaction and produce a large amount of carbon monoxide in coal dust under the impact of gas detonation, the death toll that its toxicological characteristics again can aggravation accident.So in Coal Mine Disasters, the gas explosion accident that has coal dust to participate in always is the most serious, has had a strong impact on Safety of Coal Mine Production, has restricted the paces of Dissertation of Development of Coal Industry.Therefore, research gas and coal dust mixed explosion (gas explosion that has coal dust to participate in) characteristic is significant to grasping the particularly serious Coal Mine Disasters of its failure law and prevention and control, yet, also there is no at present the patent of studying about in this respect, that is to say, be necessary to invent and a kind ofly can carry out gas and coal dust mixed explosion simulation test device, for carrying out related science research, offer help, and find gas by campaign research, the relation of mutually promoting of coal dust explosion is (as the impact of Dust Concentration on the gas explosion limit, gas density is on impact of the coal dust explosion limit etc.), and each characteristic parameter of gas and coal dust mixed explosion is (as pressure, temperature, carbon monoxide, flame, flue gas cloud etc.) Evolution, for providing theoretical, the prevention and control of particularly serious gas and coal dust disaster accident and rescue support.
Summary of the invention
For addressing the above problem, the object of the present invention is to provide a kind of gas and coal dust mixed explosion simulation test device, by the present invention, can study the Evolution of each characteristic parameter in the relation of mutually promoting between gas and coal dust explosion, gas and coal dust mixed explosion process.
The technical solution used in the present invention is:
Invent a kind of gas and coal dust mixed explosion simulation test device, described gas cylinder is connected with b with b, flowmeter a with b, solenoid valve a with reduction valve a by connecting pipe respectively with pneumatic accumulator, is then intersected in threeway; Another interface of described threeway is connected with coal dust chamber by connecting pipe, then by valve a access simulation tunnel; Described vacuum pump is by connecting pipe and valve b access simulation tunnel; Described simulation tunnel is fixed on test stand, has arranged explosion relief valve, igniting probe, pressure transducer, temperature sensor and carbon monoxide transducer on it; Described igniting probe is connected with lighter by connecting line, and the other end of lighter is connected with data collecting instrument by connecting line; Described pressure transducer, temperature sensor and carbon monoxide transducer are distinguished the distinct interface of access data Acquisition Instrument by connecting line; Described data collecting instrument separately has the connecting line of leading up to be connected with high-speed camera instrument; Described high-speed camera instrument is installed on A-frame, by data line, is connected in computing machine; Described U-shaped iron wire bar is fixed on rubber ring, and outside rubber ring, a nested sponges cover, jointly forms coal dust and sweep.
Further, described methane gas cylinder and pneumatic accumulator fixed placement, prevent from toppling over and occur accident potential.
Further, described coal dust has screw capping mouth on chamber, by this mouth, can pack prefabricated coal dust into, coal dust will be more than 200 orders, dry through electric drying oven with forced convection, and by the good grams of electronic balance weighing, after packing into, tighten lid mouthful, the cavity in coal dust chamber is curved, is beneficial to coal dust and is blown in simulation tunnel.
Further, described simulation tunnel is the cylinder barrel shaped cavity that transparent high-strength armoured-glass is made, and two ends are detachable, fixes the transparent high-strength armoured-glass of cylindrical tube and both ends of the surface by bolt, nut and O-ring seal.
Further, described explosion relief valve is installed on the near middle in simulation tunnel, to prevent that the pressure that coal dust explosion produces from surpassing tempered glass intensity and damaging simulation tunnel; Described igniting probe is installed on the middle part in simulation tunnel, and needle point is positioned at the center of drift section, so that the data acquisition in blast process; Described pressure transducer measurement range is 0～10MPa, the highest observable temperature of temperature sensor is not less than 4000 ℃, the measurement range of carbon monoxide transducer is 0～500ppm, each number of sensors is determined according to the length in simulation tunnel, wherein pressure transducer is from middle part, simulation tunnel to a side disposed at equal distance, temperature sensor is arranged along both sides to a side from middle part, simulation tunnel, carbon monoxide transducer is arranged to a side from middle part, simulation tunnel the whole story, and each sensor is connected in the different channel interfaces of data collecting instrument; Described data collecting instrument is for the pressure, temperature and the carbon monoxide data that record, storage sensor gathers.
Further, described lighter, data collecting instrument and high-speed camera instrument are connected by connecting line, when lighter is lighted igniting probe, trigger data acquisition instrument starts image data, now data collecting instrument by external trigger open high-speed camera instrument synchronously start shooting; Described high-speed camera instrument is adjustable focus, and minimum exposure time is 1 μ s, reducing largest frames scooter 100 in resolution situation, 000fps, it is erected on the adjustable A-frame of each orientation angles, and be connected with computing machine by data line, in computing machine, by software, high-speed camera instrument is operated and photographic images is stored, analyzed and processes.
Further, described U-shaped iron wire bar is U-shaped hard wire, its length is not less than the length in simulation tunnel, rubber ring place circular diameter is slightly less than simulation tunnel, sponges cover is that soft sponge is to realize cleaning function, and rubber ring and sponges cover have a gap, during in order to cleaning simulation tunnel after test completes, pass through igniting probe.
Further, this device comprises following use step:
1) take off the clear glass section of simulation both sides, tunnel, with coal dust, clear away clean simulation tunnel, after cleaning, airtight simulation tunnel both ends of the surface.
2) check the connection integrity of each sensor, open data collecting instrument; High-speed camera instrument is erected on A-frame, with data line, high-speed camera instrument is connected, uses simultaneously connecting line connection data Acquisition Instrument and high-speed camera instrument with computing machine, open computing machine and high-speed camera instrument, software is controlled in the shooting of opening afterwards in computing machine, according to the realtime graphic shown in software, adjust A-frame and high-speed camera instrument, obtain required shooting angle and sharpness.
3) keep valve a closed condition, open valve b, open vacuum pump simulation tunnel is vacuumized; Valve-off b, packs 200 prefabricated order coal dusts into coal dust chamber; Open valve a, and priority is opened methane gas cylinder, pneumatic accumulator, reduction valve a and b, solenoid valve a and b and flowmeter a and b, by regulating methane and pressurized air to enter the combined amount in simulation tunnel and different prefabricated coal dust amount, obtain the premix space under different coal dusts and gas density.
4) valve-off a, checks the integrity that is connected of igniting probe and lighter, uses connecting line tie point firearm and data collecting instrument simultaneously; Lighter is lighted a fire to igniting probe, and trigger data acquisition instrument starts to gather the real time data of pressure, temperature and carbon monoxide, data collecting instrument is opened high-speed camera instrument by external trigger simultaneously, synchronously starts gas and coal dust mixed explosion overall process in simulation tunnel to make a video recording.
5) pass through pressure, temperature and the carbon monoxide data to gathering, comprehensive analysis and the processing of gas and coal dust mixed explosion image, the rule that finds gas and coal dust explosion to mutually promote, and the Evolution of each characteristic parameter of gas and coal dust mixed explosion (as detonation stresses ripple propagation law, temperature changing regularity, carbon monoxide generation and Changing Pattern, flame Changing Pattern and flue gas cloud propagation law etc.).
The invention has the beneficial effects as follows:
1, the present invention can study the relation of mutually promoting between gas and coal dust explosion quantitatively;
2, the present invention can study the Evolution of each characteristic parameter of gas and coal dust mixed explosion (as pressure, temperature, carbon monoxide, flame, flue gas cloud etc.) quantitatively;
3, simple structure of the present invention, stable performance, conveniently carry out the series of studies work of gas and coal dust explosion correlativity.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention 1.
Fig. 2 is the structural representation of the embodiment of the present invention 2.
Fig. 3 is coal dust chamber inner structure schematic diagram.
Fig. 4 is simulation tunnel schematic perspective view.
Fig. 5 is that coal dust is swept schematic perspective view.
Wherein: 1-methane gas cylinder, 2-pneumatic accumulator, 3-reduction valve a, b, 4-solenoid valve a, b, 5-flowmeter a, b, 6-threeway, 7-coal dust chamber, 8-valve a, b, 9-vacuum pump, 10-simulation tunnel, 11-test stand, 12-explosion relief valve, 13-igniting probe, 14-lighter, 15-pressure transducer a, b, c, 16-temperature sensor a, b, c, 17-carbon monoxide transducer a, b, 18-data collecting instrument, 19-high-speed camera instrument, 20-A-frame, 21-computing machine, 30-connecting pipe, 40-connecting line, 50-data line, 60-bolt, 61-nut, 62-O-ring seal, 70-U-shaped iron wire bar, 71-rubber ring, 72-sponges cover.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further elaborated with each embodiment.
If Fig. 1 is the structural representation of the embodiment of the present invention 1, a kind of gas and coal dust mixed explosion simulation test device, described gas cylinder 1 is connected with 5b with 4b, flowmeter 5a with 3b, solenoid valve 4a with reduction valve 3a by connecting pipe 30 respectively with pneumatic accumulator 2, is then intersected in threeway 6; Another interface of described threeway 6 is connected with coal dust chamber 7 by connecting pipe 30, then by valve 8a access simulation tunnel 10; Described vacuum pump 9 is by connecting pipe 30 and valve 8b access simulation tunnel 10; Described simulation tunnel 10 is fixed on test stand 11, has arranged explosion relief valve 12, igniting probe 13, pressure transducer 15, temperature sensor 16 and carbon monoxide transducer 17 on it; Described igniting probe 13 is connected with lighter 14 by connecting line 40, and the other end of lighter 14 is connected with data collecting instrument 18 by connecting line 40; Described pressure transducer 15, temperature sensor 16 and carbon monoxide transducer 17 are by the distinct interface of connecting line 40 difference access data Acquisition Instruments 18; Described data collecting instrument 18 separately has the connecting line of leading up to 40 to be connected with high-speed camera instrument 19; Described high-speed camera instrument 19 is installed on A-frame 20, by data line 50, is connected in computing machine 21; Described U-shaped iron wire bar 70 is fixed on rubber ring 71, and in rubber ring 71 outsides, a nested sponges cover 72, jointly forms coal dust and sweep.
Wherein, described methane gas cylinder 1 and pneumatic accumulator 2 fixed placement, prevent from toppling over and occur accident potential, on described coal dust chamber 7, there is screw capping mouth, by this mouth, can pack prefabricated coal dust into, coal dust will be more than 200 orders, dry through electric drying oven with forced convection, and by the good grams of electronic balance weighing, after packing into, tighten lid mouthful, the cavity in coal dust chamber is curved, be illustrated in figure 3 its diagrammatic cross-section, be conducive to like this coal dust be blown into simulation tunnel in and not residual, the cylinder barrel shaped cavity that make for transparent high-strength armoured-glass in described simulation tunnel 10, two ends are fixed and are sealed by bolt 60, nut 61 and O-ring seal 62, as shown in Figure 4, described explosion relief valve 23 is installed on the near middle in simulation tunnel 20, to prevent that the pressure that coal dust explosion produces from surpassing tempered glass intensity and damaging simulation tunnel 20, described igniting probe 13 is installed on the middle part in simulation tunnel 10, and needle point is positioned at the center of drift section, so that the data acquisition in blast process, described pressure transducer 15 measurement ranges are 0～10MPa, temperature sensor 16 the highest observable temperatures are not less than 4000 ℃, the measurement range of carbon monoxide transducer 17 is 0～500ppm, each number of sensors is determined according to the length in simulation tunnel 10, wherein pressure transducer 15 is from simulation 10 middle parts, tunnel to a side disposed at equal distance, temperature sensor 16 is arranged along both sides to a side from simulation 10 middle parts, tunnel, carbon monoxide transducer 17 is arranged from simulation 10 middle parts, tunnel to a side whole story, their number is respectively 3 in embodiments of the present invention, 3, 2, and each sensor is connected in the different channel interfaces of data collecting instrument 18, described data collecting instrument 18 is for the pressure, temperature and the carbon monoxide data that record, storage sensor gathers, described lighter 14, data collecting instrument 18 and high-speed camera instrument 19 are connected by connecting line 40, when lighter 14 is lighted igniting probe 13, trigger data acquisition instrument 18 starts image data, and now data collecting instrument 18 is opened high-speed camera instrument 19 by external trigger and synchronously started to make a video recording, described high-speed camera instrument 19 is adjustable focus, and minimum exposure time is 1 μ s, reducing largest frames scooter 100 in resolution situation, 000fps, it is erected on the adjustable A-frame 20 of each orientation angles, and be connected with computing machine 21 by data line 50, in computing machine 21, by software, high-speed camera instrument 19 is operated and photographic images is stored, analyzed and processes, described coal dust is swept as shown in Figure 5, wherein U-shaped iron wire bar 70 is U-shaped hard wire, its length is not less than the length in simulation tunnel 10, rubber ring 71 place circular diameters are slightly less than simulation tunnel 10, sponges cover 72 is for soft sponge is to realize cleaning function, and rubber ring 71 and sponges cover 72 have a gap, during in order to cleaning simulation tunnel 10 after test completes, pass through igniting probe 13.
When using this device to carry out campaign, comprise that following several are used step:
1) take off the clear glass section of simulation 10 both sides, tunnel, with coal dust, clear away clean simulation tunnel 10, after cleaning, airtight simulation tunnel 10 both ends of the surface.
2) check the connection integrity of each sensor, open data collecting instrument 18; High-speed camera instrument 19 is erected on A-frame 20, with data line 50, high-speed camera instrument 19 is connected, is used simultaneously connecting line 40 connection data Acquisition Instruments 18 and high-speed camera instrument 19 with computing machine 21, open computing machine 21 and high-speed camera instrument 19, software is controlled in the shooting of opening afterwards in computing machine 21, according to the realtime graphic shown in software, adjust A-frame 20 and high-speed camera instrument 19, obtain required shooting angle and sharpness.
3) keep valve 8a closed condition, open valve 8b, open 9 pairs of simulation tunnels 10 of vacuum pump and vacuumize; Valve-off 8b, packs 200 prefabricated order coal dusts into coal dust chamber 7; Open valve 8a, and priority is opened methane gas cylinder 1, pneumatic accumulator 2, reduction valve 3a and 3b, solenoid valve 4a and 4b and flowmeter 5a and 5b, by regulating methane and pressurized air to enter the combined amount in simulation tunnel 10 and different prefabricated coal dust amount, obtain the premix space under different coal dusts and gas density.
4) valve-off 8a, checks the integrity that is connected of igniting probe 13 and lighter 14, uses connecting line tie point firearm 14 and data collecting instrument 18 simultaneously; 13 igniting of 14 pairs of igniting probes of lighter, and trigger data acquisition instrument 18 starts to gather the real time data of pressure, temperature and carbon monoxide, data collecting instrument 18 is opened high-speed camera instrument 19 by external trigger simultaneously, synchronously starts gas and coal dust mixed explosion overall process in simulation tunnel 10 to make a video recording.
5) pass through pressure, temperature and the carbon monoxide data to gathering, comprehensive analysis and the processing of gas and coal dust mixed explosion image, the rule that finds gas and coal dust explosion to mutually promote, and the Evolution of each characteristic parameter of gas and coal dust mixed explosion (as detonation stresses ripple propagation law, temperature changing regularity, carbon monoxide generation and Changing Pattern, flame Changing Pattern and flue gas cloud propagation law etc.).
If Fig. 2 is the structural representation of the embodiment of the present invention 2, it is substantially the same manner as Example 1, just embodiment 1 is that high-speed camera instrument 19 is made a video recording to gas and coal dust mixed explosion process along the section in simulation tunnel 10, and embodiment 2 makes a video recording to gas and coal dust mixed explosion process along simulation tunnel 7 trend, obtain the explosive parameters Evolution of flame and flue gas cloud on the different directions of propagation.
Finally should be noted that; above content is only for illustrating technical scheme of the present invention; but not its protection domain is limited, this area scientific research and technician carry out certain modification or change to technical solution of the present invention, all include the protection domain of technical solution of the present invention in.
Claims (7)
1. a gas and coal dust mixed explosion simulation test device, it is characterized in that, described gas cylinder (1) is connected with reduction valve (3a, 3b), solenoid valve (4a, 4b), flowmeter (5a, 5b) by connecting pipe (30) respectively with pneumatic accumulator (2), is then intersected in threeway (6); Another interface of described threeway (6) is connected with coal dust chamber (7) by connecting pipe (30), then by valve (8a) access simulation tunnel (10); Described vacuum pump (9) is by connecting pipe (30) and valve (8b) access simulation tunnel (10); It is upper that described simulation tunnel (10) is fixed on test stand (11), arranged explosion relief valve (12), igniting probe (13), pressure transducer (15), temperature sensor (16) and carbon monoxide transducer (17) on it; Described igniting probe (13) is connected with lighter (14) by connecting line (40), and the other end of lighter (14) is connected with data collecting instrument (18) by connecting line (40); Described pressure transducer (15), temperature sensor (16) and carbon monoxide transducer (17) are by the distinct interface of connecting line (40) difference access data Acquisition Instrument (18); Described data collecting instrument (18) separately has the connecting line of leading up to (40) to be connected with high-speed camera instrument (19); It is upper that described high-speed camera instrument (19) is installed in A-frame (20), by data line (50), is connected in computing machine (21); It is upper that described U-shaped iron wire bar (70) is fixed on rubber ring (71), at rubber ring (71) outside nested sponges cover (72), jointly forms coal dust and sweep.
2. a kind of gas and coal dust mixed explosion simulation test device according to claim 1, is characterized in that, described methane gas cylinder (1) and pneumatic accumulator (2) are wanted fixed placement.
3. a kind of gas and coal dust mixed explosion simulation test device according to claim 1, it is characterized in that there is screw capping mouth on described coal dust chamber (7), by this mouth, can pack prefabricated coal dust into, coal dust will be more than 200 orders, curved in the cavity in coal dust chamber (7).
4. a kind of gas and coal dust mixed explosion simulation test device according to claim 1, it is characterized in that, the cylinder barrel shaped cavity that make for transparent high-strength armoured-glass in described simulation tunnel (10), two ends are detachable, fix the transparent high-strength armoured-glass of cylindrical tube and both ends of the surface by bolt (60), nut (61) and O-ring seal (62).
5. a kind of gas and coal dust mixed explosion simulation test device according to claim 1, it is characterized in that, described explosion relief valve (12) is installed on the near middle in simulation tunnel (10), to prevent that the pressure that coal dust explosion produces from surpassing tempered glass intensity and damaging simulation tunnel (10), described igniting probe (13) is installed on the middle part in simulation tunnel (10), and needle point is positioned at the center of drift section, described pressure transducer (15) measurement range is 0～10MPa, the highest observable temperature of temperature sensor is not less than 4000 ℃, the measurement range of carbon monoxide transducer is 0～500ppm, each number of sensors is determined according to the length in simulation tunnel (10), wherein pressure transducer (15) is from middle part, simulation tunnel (10) to a side disposed at equal distance, temperature sensor (16) is arranged along both sides to a side from middle part, simulation tunnel (10), carbon monoxide transducer (17) is arranged from middle part, simulation tunnel (10) to a side whole story, and each sensor is connected in the different channel interfaces of data collecting instrument (18).
6. a kind of gas and coal dust mixed explosion simulation test device according to claim 1 or 5, it is characterized in that, described lighter (14), data collecting instrument (18) and high-speed camera instrument (19) are connected by connecting line (40), when lighter (14) is lighted igniting probe (13), trigger data acquisition instrument (18) starts image data, and now data collecting instrument (18) is opened high-speed camera instrument (19) by external trigger and synchronously started to make a video recording; Wherein, described high-speed camera instrument (19) is erected on the adjustable A-frame (20) of each orientation angles, and be connected with computing machine (21) by data line (50), in computing machine (21), by software, high-speed camera instrument (19) is operated and photographic images is stored, analyzed and processes.
7. a kind of gas and coal dust mixed explosion simulation test device according to claim 1, it is characterized in that, described U-shaped iron wire bar (70) is U-shaped hard wire, its length is not less than the length in simulation tunnel (10), rubber ring (71) place circular diameter is slightly less than simulation tunnel (10), sponges cover (72) is soft sponge, and rubber ring (71) and sponges cover (72) have a gap, during in order to cleaning simulation tunnel (10) after test completes by igniting probe (13).
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