CN204788893U - Visual test device that digs dust migration law in tunnel is combined in research - Google Patents
Visual test device that digs dust migration law in tunnel is combined in research Download PDFInfo
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- CN204788893U CN204788893U CN201520522121.2U CN201520522121U CN204788893U CN 204788893 U CN204788893 U CN 204788893U CN 201520522121 U CN201520522121 U CN 201520522121U CN 204788893 U CN204788893 U CN 204788893U
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Abstract
The utility model discloses a visual test device that digs dust migration law in tunnel is combined in research, this test device include the model tunnel, send out dirt system, dust removal by ventilation system, hot humid gas feed system and flow field monitoring system, the model tunnel includes transparent tunnel main part, sends out the dirt system and includes a frequency conversion dirt ware, and the dust removal by ventilation system includes blast pipe, exhaust column, frequency conversion dust catcher, frequency conversion air -blower, and hot humid gas feed system includes water bath with thermostatic control and standby fan, and flow field monitoring system includes contact measurement device and non -contact measurement device. The utility model discloses dust diffusion in the tunnel, migration and deposition phenomenon under the wet condition of heat can be simulated again to the dust migration process under the no draught effect condition that can realize in the cold state tunnel, can also simulate many ventilation condition leeward field condition that influences that the dust distributes in to the tunnel.
Description
Technical field
The utility model relates to safety engineering dust removal by ventilation model test field, especially a kind of visual test device studying dust migration rule under complex environment in tunnel, comprehensive pick face.
Background technology
Along with the raising of the comprehensive comprehensive digging equipment degree in colliery and production intensity, colliery dust hazard problem becomes increasingly conspicuous.Especially comprehensive tunnel, pick face dust output is large, concentration is high.It is reported, when not taking dust prevention, the full dust concentration severe overweight combining tunnel, pick face directly causes dust explosion hidden danger to increase.Meanwhile, driver locates respirable dust concentration severe overweight, causes coal industry pneumoconiosis patients to increase.Coal dust not only endangers the healthy of operating personnel, and likely causes coal dust explosion, leads to mine serious disasters and accidents.Therefore, the dust concentration reduced in tunnel of adopting an effective measure, has become all in all thing that coal industry controls pneumoconiosis generation and prevents coal dust explosion.
The main both at home and abroad dust prevention and control measure of comprehensive analysis obtains, there is very large limitation in existing dust-proof, dedusting technology and control measures, dust prevention and control effect is unsatisfactory, its essential problem is just at present still unintelligible to regularity of dust, causes on-the-spot a lot of design of dust pelletizing system, the layout of equipment all can not reach optimum efficiency or can not be used in key point.Therefore, the migration rule of research dust in tunnel, comprehensive pick face, particularly carry out the Study on regularity of dust under the thermal and humidity environment of tunnel, to formulation effectively dust-proof, measurements for reduction is significant, to effectively controlling mine dust, improving working conditions, enhance productivity and ensure that the safety in production of mine has far reaching significance.
Summary of the invention
Goal of the invention: the purpose of this utility model is for problems of the prior art, a kind of visual test device and the method for studying dust migration rule in tunnel, comprehensive pick face are provided, can simulate, observe and analyze the migration process of dust in tunnel under complex environment.
To achieve these goals, the utility model have employed following technical scheme: a kind of visual test device studying dust migration rule in tunnel, comprehensive pick face, comprises model tunnel, sends out dirt system, ventilating and purifying air system, hot humid gas feed system and flow field monitoring system; Described model tunnel comprises transparent tunnel main body, and tunnel body front end is provided with charging aperture, and tunnel body trailing end is provided with airduct mounting hole; Described dirt system comprises frequency conversion powder producer, and frequency conversion powder producer connects charging aperture by feeder sleeve; Described ventilating and purifying air system comprises ajutage, exhaust column, frequency-variable dust collector and frequency conversion fan blower, ajutage and exhaust column are arranged on tunnel body interior, ajutage and exhaust column tail end extend to tunnel body exterior by airduct mounting hole, frequency-variable dust collector is connected with exhaust column tail end by operation valve, and frequency conversion fan blower is connected with ajutage tail end by operation valve; Described hot humid gas feed system comprises water bath with thermostatic control and standby fan, and the tank ullage of water bath with thermostatic control is provided with air outlet and wind-supplying mouth, and air outlet is connected with frequency conversion fan blower, and wind-supplying mouth is connected with standby fan; Described flow field monitoring system comprises contact measuring apparatus and non-contact measurement device for measuring, contact measuring apparatus comprises flowmeter, Hygrothermograph and velocimeter, non-contact measurement device for measuring comprises high-speed camera, computer and lighting source, flowmeter is arranged on ajutage and exhaust column tail end, Hygrothermograph is arranged on tunnel body front end and ajutage tail end, velocimeter is arranged on ajutage and exhaust column front end, high-speed camera and light source are arranged on outside the main body of tunnel, and computer is connected with high-speed camera with flowmeter, Hygrothermograph, velocimeter respectively by data line.
Further, described ventilating and purifying air system also comprises control of dust cloth bag, and control of dust cloth bag is arranged on tunnel body trailing end.
Further, described tunnel main body section is rectangle or arch.
Further, described tunnel main material is organic glass.
Further, described Hygrothermograph is wet-and-dry bulb thermometer.
Beneficial effect: owing to have employed technique scheme, the utility model can realize in cold conditions tunnel without dust migration process in draught effect situation, to simulate again under hot wet condition dust recycling, migration and depositional phenomenon in tunnel, can also simulate wind field under many ventilation conditions affects situation to Dust distribution in tunnel.This model can dust migration process in tunnel in comprehensive simulation various factors situation, carry out visual observation and analysis simultaneously, especially can realize the simulation of thermal and humidity environment, belong to multi-functional test unit, be convenient to the complicated distinguished and admirable impact that dust is migrated and distributed in quantitative examination tunnel.Compared with its prior art, its advantage has:
1) model tunnel end face is dismountable organic glass, by prefabricated different tunnels cross sectional shape, as rectangle or arch, can carry out the Roadway model test in cross section, different tunnel;
2) the dirt system adopted is not only controlled, and feed quantity is adjustable, can simulate multiple dust-producing amount situation;
3) by selecting and exhaust column, pressure ventilation pipe in placement model tunnel, it is adjustable not only to take out pressure ratio, and draft type is adjustable, can simulate multiple ventilation situation, realizes the simulation of tunnel dust migration process under different Wind;
4) the hot humid gas feed system adopted is not only controlled, and humiture is adjustable, can realize multiple heat and to wet situation;
5) adopt contact measurement formula and non-contact measurement device for measuring in model, and in conjunction with reprocessing analysis software, realize whole audience monitoring and the analysis of tunnel dust migration process;
6) by the utility model can each influence factor of visual comprehensive analysis on the impact of dust migration in tunnel, therefore can more fully for study thermal and humidity environment and many in dust migration rule in tunnel, comprehensive pick face under ventilation condition.
Accompanying drawing explanation
Fig. 1 is the three-dimensional structure schematic diagram of test unit of the present utility model;
Fig. 2 is the plan structure schematic diagram in model tunnel of the present utility model;
Fig. 3 be model tunnel of the present utility model face structural representation;
Fig. 4 is the multiple draft type schematic diagram one based on test method of the present utility model;
Fig. 5 is the multiple draft type schematic diagram two based on test method of the present utility model;
Fig. 6 is the multiple draft type schematic diagram three based on test method of the present utility model;
Fig. 7 is the multiple draft type schematic diagram four based on test method of the present utility model;
Fig. 8 is the multiple draft type schematic diagram five based on test method of the present utility model;
Fig. 9 is the multiple draft type schematic diagram six based on test method of the present utility model.
In figure: 1, frequency conversion powder producer; 2, tunnel main body; 3, ajutage; 4, exhaust column; 5, control of dust cloth bag; 6, frequency-variable dust collector; 7, frequency conversion fan blower; 8, water bath with thermostatic control; 9, standby fan; 10, operation valve; 11, flowmeter; 12, Hygrothermograph; 13, velocimeter; 14, lighting source; 15, high-speed camera; 16, computer.
Embodiment:
Below in conjunction with accompanying drawing the utility model done and further explain.
As shown in Figures 1 to 3, the visual test device that the migration of dust in the thermal and humidity environment of tunnel, pick face is combined in simulation of the present utility model comprises model tunnel, sends out dirt system, ventilating and purifying air system, hot humid gas feed system and flow field monitoring system.
Described model tunnel comprises transparent tunnel main body 2, and tunnel main body 2 front end is provided with charging aperture, and tunnel main body 2 tail end is provided with airduct mounting hole.The section configuration in the tunnel that model tunnel will be simulated and size, choose suitable model test ratio of similitude, based on similarity theory, calculates ratio of similitude, the size of the shape of the section in Confirming model tunnel, length and charging aperture and airduct mounting hole.In the present embodiment, tunnel main body 2 material is organic glass, and tunnel main body 2 is spliced by some pieces of poly (methyl methacrylate) plates, the rubber weather strip that stitching portion is provided with, and ensures not ooze wind.Tunnel main body 2 cross section is rectangle or arch, and the machine glass plate of tunnel main body 2 end face is demountable structure, so that change tunnel cross sectional shape.
Described ventilating and purifying air system comprises ajutage 3, exhaust column 4, control of dust cloth bag 5, frequency-variable dust collector 6, frequency conversion fan blower 7, ajutage 3 and exhaust column 4 are symmetricly set on the inner both sides of tunnel main body 2, ajutage 3 is relative with charging aperture with exhaust column 4 front end, it is outside that ajutage 3 and exhaust column 4 tail end extend to tunnel main body 2 by airduct mounting hole, control of dust cloth bag 5 is arranged on tunnel main body 2 tail end, in order to catch part dust, control of dust cloth bag 5 offers the preformed hole matched with ajutage 3 and exhaust column 4, ajutage 3 and exhaust column 4 is facilitated to pass, frequency-variable dust collector 6 is connected with exhaust column 4 tail end by operation valve 10, frequency conversion fan blower 7 is connected with ajutage 3 tail end by operation valve 10.Set frequency-variable dust collector 6 and frequency conversion fan blower 7 frequency according to set pressure ratio of taking out, difference can be realized and take out pressure ratio wind field; Also by regulating ajutage 3, exhaust column 4 to extend into length in model tunnel, regulate ajutage 3, the relative position of exhaust column 4 in model tunnel, and close frequency conversion fan blower 7 or frequency-variable dust collector 6 realizes multiple draft type.
Described hot humid gas feed system comprises water bath with thermostatic control 8 and standby fan 9, and the tank ullage of water bath with thermostatic control 8 is provided with air outlet and wind-supplying mouth, and air outlet is connected with frequency conversion fan blower 7, and wind-supplying mouth is connected with standby fan 9.Supply hot humid gas to model tunnel continuously by water bath with thermostatic control 8, adjustable water bath water temperature to wet requirement with the heat meeting air feed, can enable the supply of emergency blower auxiliary heat humid gas.
Described flow field monitoring system comprises contact measuring apparatus and non-contact measurement device for measuring, contact measuring apparatus comprises flowmeter 11, Hygrothermograph 12 and velocimeter 13, non-contact measurement device for measuring comprises high-speed camera 15, computer 16 and lighting source 14, flowmeter 11 is arranged on ajutage 3 and exhaust column 4 tail end, Hygrothermograph 12 is wet-and-dry bulb thermometer, Hygrothermograph 12 is arranged on tunnel main body 2 front end and ajutage 3 tail end, velocimeter 13 is arranged on ajutage 3 and exhaust column 4 front end, lighting source 14 and high-speed camera 15 are arranged on outside tunnel main body 2, and high-speed camera 15 and tunnel main body 2 relative position can be changed as required, computer 16 by data line respectively with flowmeter 11, Hygrothermograph 12, velocimeter 13 is connected with high-speed camera 15.
The Visualization method of dust migration rule in tunnel, pick face is combined in research based on above-mentioned test unit, and it comprises the following steps:
A), hot humid gas feed system is started: inject warm water to assigned scale line to water bath with thermostatic control 8, to fetch boiling water water bath with thermostatic control 8 power supply, its instrument is set to required heating temperatures, maintenance number minute after temperature arrival is temperature required, make water bath with thermostatic control 8 enter automatic constant-temperature to control, then standby fan 9 is opened, hot humid gas is passed into model tunnel, when studying cold conditions tunnel dust migration rule, skip step a), do not start hot humid gas feed system, directly enter step b);
B), ventilating and purifying air system is started: open frequency conversion fan blower 7 and frequency-variable dust collector 6 power supply, until frequency conversion fan blower 7 and frequency-variable dust collector 6 stable after, record flowmeter 11 data on ajutage 3 and exhaust column 4 respectively, calculate and take out pressure ratio, thus the wind field having and necessarily take out pressure ratio is provided;
C), start and send out dirt system: screening dust, a certain amount of dust is injected frequency conversion powder producer 1, and start frequency conversion powder producer 1, dust enters the model tunnel under ventilation condition by feeder sleeve, charging aperture, and simulation is combined pick face and sent out dirt;
D), flow field monitoring system is started: carry out contact type measurement and non-contact measurement, wherein,
Contact type measurement: the temperature and humidity data being obtained hot humid gas by hot wet bulb thermometer 12, the flow obtained by flowmeter 11 and velocimeter 13 and flow speed data, calculated and record and take out pressure wind field situation;
Non-contact measurement: on the one hand, by the transient images of the Dust distribution in high-speed camera 15 acquisition type tunnel, therefrom extract regularity of dust intuitively, on the other hand, particle image velocimetry method is adopted to measure the dust particle velocity field of specifying section, for cross section, driver position, position residing for general silo shearer driver is: in centre position, tunnel, distance face 3m ~ 5m and height 1.5m place, by the conversion of model tunnel scale down, can determine that object cross section is positioned at the particular location of tunnel main body 2;
E) the temperature and humidity data, in conjunction with flow field monitoring system obtained, the dust particle velocity field of taking out pressure wind field situation, regularity of dust and appointment section, analyze dust migration rule in the tunnel, comprehensive pick face under thermal and humidity environment and middle ventilation condition.
Step a) in, by regulating thermostatic water-bath 8 design temperature, realize multiple hot and humid gas supply situation.
In step b) in, on the one hand, change by change frequency conversion fan blower 7 and frequency-variable dust collector 6 power and take out pressure ratio, the multiple wind field taking out pressure ratio situation is provided; On the other hand, extend into the length in model tunnel by adjustment ajutage 3, exhaust column 4 and regulate ajutage 3, the relative position of exhaust column 4 in model tunnel, and close frequency conversion fan blower 7 or frequency-variable dust collector 6 realizes multiple draft type, as shown in Fig. 4 to 8, draft type comprises " hybrid ", " pull-out type " and " forced ", wherein " hybrid " can be divided into " the short odd test of short pressure ", " the short odd test of long pressure ", " the long odd test of short pressure ", " the long odd test of long pressure ", wherein, the comprehensive pick face of air outlet distance of short pressure and ajutage 3 is nearer; The comprehensive pick face of air outlet distance of long pressure and ajutage 3 is far away; It is nearer that short air inlet distance of taking out i.e. exhaust column 4 combines pick face; It is far away that long air inlet distance of taking out i.e. exhaust column 4 combines pick face; Pull-out type and frequency conversion fan blower 7 are closed, and frequency-variable dust collector 6 works, and only carry out exhausting by exhaust column 4; Forced i.e. frequency-variable dust collector 6 is closed, and frequency conversion fan blower 7 works, and is only blown by ajutage 3.
In step c) in, by the frequency of frequency conversion powder producer 1, realize multiple dust-producing amount operating mode.
The above is only preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (5)
1. a visual test device for dust migration rule in tunnel, pick face is combined in research, it is characterized in that: comprise model tunnel, send out dirt system, ventilating and purifying air system, hot humid gas feed system and flow field monitoring system, described model tunnel comprises transparent tunnel main body (2), and tunnel main body (2) front end is provided with charging aperture, and tunnel main body (2) tail end is provided with airduct mounting hole, described dirt system comprises frequency conversion powder producer (1), and frequency conversion powder producer (1) connects charging aperture by feeder sleeve, described ventilating and purifying air system comprises ajutage (3), exhaust column (4), frequency-variable dust collector (6) and frequency conversion fan blower (7), it is inner that ajutage (3) and exhaust column (4) are arranged on tunnel main body (2), it is outside that ajutage (3) and exhaust column (4) tail end extend to tunnel main body (2) by airduct mounting hole, frequency-variable dust collector (6) is connected with exhaust column (4) tail end by operation valve (10), and frequency conversion fan blower (7) is connected with ajutage (3) tail end by operation valve (10), described hot humid gas feed system comprises water bath with thermostatic control (8) and standby fan (9), the tank ullage of water bath with thermostatic control (8) is provided with air outlet and wind-supplying mouth, air outlet is connected with frequency conversion fan blower (7), and wind-supplying mouth is connected with standby fan (9), described flow field monitoring system comprises contact measuring apparatus and non-contact measurement device for measuring, contact measuring apparatus comprises flowmeter (11), Hygrothermograph (12) and velocimeter (13), non-contact measurement device for measuring comprises high-speed camera (15), computer (16) and lighting source (14), flowmeter (11) is arranged on ajutage (3) and exhaust column (4) tail end, Hygrothermograph (12) is arranged on tunnel main body (2) front end and ajutage (3) tail end, velocimeter (13) is arranged on ajutage (3) and exhaust column (4) front end, high-speed camera (15) and light source (14) are arranged on tunnel main body (2) outside, computer (16) by data line respectively with flowmeter (11), Hygrothermograph (12), velocimeter (13) is connected with high-speed camera (15).
2. a kind of visual test device studying dust migration rule in tunnel, comprehensive pick face according to claim 1, it is characterized in that: described ventilating and purifying air system also comprises control of dust cloth bag (5), control of dust cloth bag (5) is arranged on tunnel main body (2) tail end.
3. a kind of visual test device studying dust migration rule in tunnel, comprehensive pick face according to claim 1, is characterized in that: main body (2) cross section, described tunnel is rectangle or arch.
4. a kind of visual test device studying dust migration rule in tunnel, comprehensive pick face according to claim 1, is characterized in that: described tunnel main body (2) material is organic glass.
5. a kind of visual test device studying dust migration rule in tunnel, comprehensive pick face according to claim 1, is characterized in that: described Hygrothermograph (12) is wet-and-dry bulb thermometer.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104990687A (en) * | 2015-07-17 | 2015-10-21 | 中国矿业大学 | A visual experiment device and method for studying dust migration rules of fully-mechanized excavating face roadways |
| CN105547640A (en) * | 2016-01-19 | 2016-05-04 | 中国矿业大学 | Visual experiment deice and method for simulating dust transfer in thermal and humid environment of fully mechanized face tunnel |
| CN113770147A (en) * | 2021-08-20 | 2021-12-10 | 安徽理工大学 | A exhaust column system for dust fall |
| CN115077956A (en) * | 2022-05-13 | 2022-09-20 | 中国矿业大学 | Simulation test system for ventilation and dust removal in hazardous chemical substance transportation tank car |
-
2015
- 2015-07-17 CN CN201520522121.2U patent/CN204788893U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104990687A (en) * | 2015-07-17 | 2015-10-21 | 中国矿业大学 | A visual experiment device and method for studying dust migration rules of fully-mechanized excavating face roadways |
| CN105547640A (en) * | 2016-01-19 | 2016-05-04 | 中国矿业大学 | Visual experiment deice and method for simulating dust transfer in thermal and humid environment of fully mechanized face tunnel |
| CN113770147A (en) * | 2021-08-20 | 2021-12-10 | 安徽理工大学 | A exhaust column system for dust fall |
| CN115077956A (en) * | 2022-05-13 | 2022-09-20 | 中国矿业大学 | Simulation test system for ventilation and dust removal in hazardous chemical substance transportation tank car |
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| 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: 20151118 Termination date: 20180717 |