CN104698121B - Gas deflagration to detonation transition experimental provision in minute yardstick pipeline - Google Patents
Gas deflagration to detonation transition experimental provision in minute yardstick pipeline Download PDFInfo
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- CN104698121B CN104698121B CN201510056215.XA CN201510056215A CN104698121B CN 104698121 B CN104698121 B CN 104698121B CN 201510056215 A CN201510056215 A CN 201510056215A CN 104698121 B CN104698121 B CN 104698121B
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Abstract
The present invention relates to gas deflagration to detonation transition experimental provision in a kind of minute yardstick pipeline, belong to gas explosion research field under coal mine. Comprise backplate, minute yardstick duct board, armorplate glass and front panel; Backplate comprises igniter head hole, oxygen or air-in, methane gas input port, Pressure gauge hole, pressure sensor hole, gasket seal, screw, exhaust outlet. In this experimental provision, pipeline section is square, and smallest dimension can reach 10mm, can meet the requirement of gas deflagration to detonation transition experiment in minute yardstick pipeline completely, can measure the experimental data such as explosion velocity, detonation pressure of gas explosion time in pipeline simultaneously.
Description
Technical field
The present invention relates to gas deflagration to detonation transition experimental provision in a kind of minute yardstick pipeline, belong under coal mineGas explosion research field.
Background technology
At present, the industrial 70% above energy of China comes from coal, and when very long after nowIn, coal also will be served as extremely important strategic resource, occupy very consequence in national economy.However, relatively national with other main coal productions, in the coal production of China, also have many urgently solutionsTough questions certainly, at this wherein, just has the Safety production questions of coal, the gas in coal production processThe sustainable growth of explosion disaster accident, has seriously hindered the benign growth of national economy and stablizing of society.
Therefore, carry out the research of methane gas deflagration to detonation transition mechanism and not only there is important academic significance, andGas explosion disaster early warning and protection in coal production process are had important practical significance. Domestic carry out wattThe experimental channel diameter of this gas deflagration to detonation transition research is generally greater than 100mm, does not belong to minute yardstick pipeline barPart, as the research employing of Nie Baisheng to gas explosion flame image is that section is the square of 200mm × 200mmPipeline [Nie Baisheng, He Xueqiu, Yang Chunli etc. gas explosion flame image strengthens and propagation characteristic research [C]. //The 4th national computation explosion mechanics proceeding .2008:622-627.]; Conventionally developmental tube is changed in inconvenienceRoad; Can only come the gas flame in observation section subtube, Wu Faguan by the visual windows of limited size simultaneouslyMeasure the flame of whole pipe interior.
Summary of the invention
The object of the invention is to have in order to solve prior art that experiment yardstick is large, yardstick is non-adjustable and nothingMethod realizes overall visual problem, and gas deflagration to detonation transition experimental provision in a kind of minute yardstick pipeline is provided.
The object of the invention is to be achieved through the following technical solutions.
Gas deflagration to detonation transition experimental provision in minute yardstick pipeline, comprises backplate, minute yardstick duct board, steelChange glass plate and front panel; Backplate comprises igniter head hole, oxygen or air-in, and methane gas is defeatedEntrance, Pressure gauge hole, pressure sensor hole, gasket seal, screw, exhaust outlet.
Annexation:
Backplate surrounding is distributed with screw, arranges hole overleaf on the horizontal axis of plate, and hole is followed successively by a littleDuration and degree of heating hole, oxygen or air-in, methane gas input port, Pressure gauge hole, pressure sensor hole, rowGas port; Gasket seal is positioned between the hole of arranging on screw and axis;
Backplate, minute yardstick duct board and front panel material are No. 45 steel; The quantity of described screw is at least fourIndividual; Described pressure sensor hole number is at least four, and distance equalization between pressure sensor hole;
Minute yardstick duct board surrounding is distributed with screw, on the horizontal axis of minute yardstick duct board, is furnished with hollow outMinute yardstick pipeline; The thickness of minute yardstick duct board and the width of pipeline can carry out manual control, to reachTo the object of controlling minute yardstick pipeline yardstick.
The material of armorplate glass is K9 glass, and thickness is at least 12mm; Can observe and record whole pipelineMiddle gas explosion flame transmission situation;
Front panel surrounding is distributed with screw, hollow out observation panel and safety glass on the horizontal axis of front panelPlate standing groove, hollow out edge is stepped, to fix safety glass Board position; Armorplate glass standing grooveThe degree of depth need ensure below 12mm;
Armorplate glass is placed on the armorplate glass standing groove of front panel; Backplate, minute yardstick duct boardBe bolted successively with the front panel of having placed armorplate glass; After installing, can see by observation panelThe hole of arranging on the horizontal axis of the panel of passing away.
The course of work:
By igniter head, oxygen or air input head, methane gas input head, Pressure gauge and pressure sensorBe installed in the hole of arranging on the horizontal axis of backplate. And exhaust outlet is connected with vavuum pump.
By oxygen or air input head and methane gas input head place valve closing.
Vacuum pump switch is opened, pipeline internal gas pressure is evacuated to-1 atmospheric pressure. Close vavuum pump. Leave standstill, seeExamine the variation of pressure tabular value, with checking experiment device air-tightness.
In the situation that experimental provision air-tightness is good, successively open methane gas input head switch and oxygen orAir input head switch, inputs a certain amount of methane gas and oxygen or air. Leave standstill more than 10 hours. BeatBattle duration and degree of heating switch, by mixing of certain density gas in minute yardstick pipeline in the present invention and oxygen or airObject point combustion.
Utilize high-speed photography device to record the situation of change of gas flame in whole pipeline. Utilize pressure sensorAnd associated processing system records the delta data of pressure in whole pipeline.
Treat that experiment finishes, the valve of closed gas gas input head, oxygen or air input head, opens vacuumPump, removes the product in pipeline in time.
Beneficial effect
1, in order to carry out the experimental study of gas deflagration to detonation transition mechanism in minute yardstick pipeline, the invention providesGas deflagration to detonation transition experimental provision in a kind of minute yardstick pipeline. In this experimental provision, pipeline section is square,Smallest dimension can reach 10mm, can meet wanting that in minute yardstick pipeline, gas deflagration to detonation transition is tested completelyAsk, can measure the experimental data such as explosion velocity, detonation pressure of gas explosion time in pipeline simultaneously.
2, yardstick adjustability, because minute yardstick duct board can be made into different according to the needs of pipeline yardstickShape, and entirety of the present invention is connected and fixed by bolt, is easy to change minute yardstick duct board, therefore of the present inventionOne large advantage is arbitrarily to regulate according to demand the yardstick of minute yardstick pipeline.
3, overall visibility, this device utilizes in test high-speed photography device can obtain in whole pipeline wattThis flame image in the time of deflagration to detonation transition. Utilize complete flame image data, can be to gas at micro-chiFlame propagation velocity in degree pipeline in Process of Transition from Deflagration and flame profile change carries out more accuratelyCalculate and research.
Brief description of the drawings
Fig. 1 is the back plate structure schematic diagram in the present invention;
Fig. 2 is the minute yardstick duct board schematic diagram in the present invention;
Fig. 3 is the armorplate glass schematic diagram in the present invention;
Fig. 4 is front-panel structure schematic diagram in the present invention.
Fig. 5 is each several part connection diagram in the present invention.
Wherein, 1-backplate comprises igniter head hole, 2-oxygen or air-in, and 3-methane gas input port,4-Pressure gauge hole, 5-pressure sensor hole, 6-gasket seal, 7-screw, 8-exhaust outlet.
Detailed description of the invention
Below in conjunction with accompanying drawing and embodiment, the present invention will be further described.
Embodiment 1
Gas deflagration to detonation transition experimental provision in minute yardstick pipeline, comprises backplate, minute yardstick duct board, steelChange glass plate and front panel; Backplate comprises igniter head hole 1, oxygen or air-in 2, methane gasInput port 3, Pressure gauge hole 4, pressure sensor hole 5, gasket seal 6, screw 7, exhaust outlet 8;
Annexation:
Backplate thickness is 20mm, and width is 120mm, and length is 2120mm; Surrounding is distributed with screw 7,The hole that on the horizontal axis of plate, placement diameter is 5mm overleaf, hole is followed successively by igniter head hole 1,4, ten seven, 3, one Pressure gauge holes of 2, one methane gas entrances of individual oxygen or air intake pressure passes5, one, sensor hole exhaust outlet 8; Gasket seal 6 is positioned between the hole of arranging on screw 7 and axis;Distance equalization between described pressure sensor hole 5 is 100mm; As shown in Figure 1.
Minute yardstick duct board width is 120mm, and length is 2120mm, and thickness is 10mm; Surrounding is distributed with spiral shellHole 7 is furnished with the minute yardstick pipeline of hollow out, minute yardstick duct width on the horizontal axis of minute yardstick duct boardFor 10mm, length is 2000mm; As shown in Figure 2
The material of armorplate glass is K9 glass, and thickness is 20mm, and width is 50mm, and length is 2060mm;As shown in Figure 3.
Front panel surrounding is distributed with screw 7, hollow out observation panel and safety glass on the horizontal axis of front panelPlate standing groove, hollow out edge is stepped, to fix safety glass Board position; Described armorplate glass is placedThe degree of depth of groove is 10mm; Described hollow out observation panel width is 30mm, and length is 2040mm; As shown in Figure 4.
Backplate, minute yardstick duct board and front panel material are steel No. 45, and the screw 7 that surrounding distributes is countedAmount is all 46; The diameter of described screw 7 is 10mm;
Armorplate glass be placed on front panel stepped on; Backplate, minute yardstick duct board and placed temperingThe front panel of glass plate is bolted successively; After installing, can see the back side by armorplate glassPlate is arranged hole on horizontal axis; As shown in Figure 5.
The course of work:
By igniter head, oxygen or air input head, methane gas input head, Pressure gauge and pressure sensorBe installed in the hole of arranging on the horizontal axis of backplate. And exhaust outlet 8 is connected with vavuum pump.
By oxygen or air input head and methane gas input head place valve closing.
Vacuum pump switch is opened, pipeline internal gas pressure is evacuated to-1 atmospheric pressure. Close vavuum pump. Leave standstill, seeExamine the variation of pressure tabular value, with checking experiment device air-tightness.
In the situation that experimental provision air-tightness is good, successively open methane gas input head switch and oxygen orAir input head switch, inputs a certain amount of methane gas and oxygen or air. Leave standstill more than 10 hours. BeatBattle duration and degree of heating switch, by mixing of certain density gas in minute yardstick pipeline in the present invention and oxygen or airObject point combustion.
Utilize high-speed photography device to record the situation of change of gas flame in whole pipeline. Utilize pressure sensorAnd associated processing system records the delta data of pressure in whole pipeline.
Treat that experiment finishes, the valve of closed gas gas input head, oxygen or air input head, opens vacuumPump, removes the product in pipeline in time.
Claims (5)
1. gas deflagration to detonation transition experimental provision in minute yardstick pipeline, is characterized in that: comprise backplate, micro-Yardstick duct board, armorplate glass and front panel; Backplate comprises igniter head hole (1), oxygen or airInput port (2), methane gas input port (3), Pressure gauge hole (4), pressure sensor hole (5), sealingPad (6), screw (7), exhaust outlet (8);
Backplate surrounding is distributed with screw (7), arranges hole overleaf on the horizontal axis of plate, and hole successivelyFor igniter head hole (1), oxygen or air-in (2), methane gas input port (3), Pressure gauge hole (4),Pressure sensor hole (5), exhaust outlet (8); Gasket seal (6) is positioned on screw (7) and axisBetween the hole of arranging;
Minute yardstick duct board surrounding is distributed with screw (7), on the horizontal axis of minute yardstick duct board, is furnished withThe minute yardstick pipeline of hollow out; The thickness of minute yardstick duct board and the width of pipeline can carry out manual control,To reach the object of controlling minute yardstick pipeline yardstick;
Front panel surrounding is distributed with screw (7), hollow out observation panel and tempering on the horizontal axis of front panelGlass plate standing groove, hollow out edge is stepped, to fix safety glass Board position; Armorplate glass is placedThe degree of depth of groove need ensure below 12mm;
Armorplate glass is placed on the armorplate glass standing groove of front panel; Backplate, minute yardstick duct boardBe bolted successively with the front panel of having placed armorplate glass.
2. gas deflagration to detonation transition experimental provision in minute yardstick pipeline as claimed in claim 1, its feature existsIn: described backplate, minute yardstick duct board and front panel material are No. 45 steel.
3. gas deflagration to detonation transition experimental provision in minute yardstick pipeline as claimed in claim 1, its feature existsIn: the quantity of described screw (7) is at least four.
4. gas deflagration to detonation transition experimental provision in minute yardstick pipeline as claimed in claim 1, its feature existsIn: described pressure sensor hole (5) quantity is at least four, and distance between pressure sensor hole (5)From equalization.
5. gas deflagration to detonation transition experimental provision in minute yardstick pipeline as claimed in claim 1, its feature existsIn: the material of armorplate glass is K9 glass, and thickness is at least 12mm.
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| CN110095146B (en) * | 2019-03-27 | 2023-12-26 | 华北水利水电大学 | Explosion venting wall monitoring device with MEMS sensing system and arrangement method thereof |
| CN110761898B (en) * | 2019-09-25 | 2020-09-29 | 中国科学院广州能源研究所 | Device for generating super-enthalpy detonation by utilizing micro-scale spiral channel |
| CN112285160A (en) * | 2020-10-19 | 2021-01-29 | 南京理工大学 | Strong-constraint closed container for ignition test of insensitive explosive and using method thereof |
| CN113063920B (en) * | 2021-03-18 | 2022-03-25 | 北京理工大学 | Small-size variable-cross-section rectangular detonation tube with wave rectifier and optical observation window |
| CN114414626B (en) * | 2022-01-21 | 2023-11-03 | 安徽理工大学 | Combustible gas detonation drive generator for high-speed loading |
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| CN100575951C (en) * | 2006-05-26 | 2009-12-30 | 南京工业大学 | Multifunctional gas explosion experiment system |
| US7669460B1 (en) * | 2007-03-09 | 2010-03-02 | The United States Of America As Represented By The Secretary Of The Navy | Small-scale shock reactivity and internal blast test |
| JP5150383B2 (en) * | 2008-06-25 | 2013-02-20 | 株式会社ガステック | Combustible gas / steam explosion test equipment |
| CN101776529B (en) * | 2009-09-23 | 2014-09-17 | 深圳市锦铭科技有限公司 | Equipment for small scale booster test |
| CN201662448U (en) * | 2010-04-02 | 2010-12-01 | 中国海洋石油总公司 | Ignition test box |
| CN102608161B (en) * | 2012-03-07 | 2013-07-24 | 北京理工大学 | Method for testing critical energy of detonation formed by direct initiation |
| CN103292954B (en) * | 2013-04-15 | 2015-06-24 | 西北工业大学 | Device for measuring knocking combustion pressure in millimeter-level circular tube |
| CN103675194B (en) * | 2013-12-18 | 2016-04-27 | 西安近代化学研究所 | A kind of COMBUSTION TO DETONATION TRANSITION proving installation and method |
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