阅读说明：本技术 一种气体爆炸及抑爆实验装置及其实验方法 (Gas explosion and explosion suppression experimental device and experimental method thereof ) 是由 李孝斌 何昆 杨春静 于 2021-07-26 设计创作，主要内容包括：本发明公开一种气体爆炸及抑爆实验装置及其实验方法,涉及气体爆炸及抑爆研究技术领域,包括：爆炸管,爆炸管内设置有点火器,对应火焰传播路径的爆炸管的侧壁上设有供光谱采集探头拍摄爆炸光谱的第一玻璃窗口、用于透过纹影仪光线的第二玻璃窗口和第三玻璃窗口、用于高速摄像机拍摄火焰传播过程与火焰形状的第四玻璃窗口,爆炸管的侧壁上还设置有若干个沿火焰传播方向顺次布置的压力传感器；本发明中在点火器点燃爆炸管内的气体后,工作人员可根据光谱采集探头、高速摄像机、纹影仪以及若干个压力传感器采集到的数据记录气体爆炸及抑爆宏观和微观过程,并对得到的数据进行对比、整合,进而更精确的获取气体爆炸及抑爆宏观过程与微观机理的关系。(The invention discloses a gas explosion and explosion suppression experimental device and an experimental method thereof, relating to the technical field of gas explosion and explosion suppression research and comprising the following steps: the side wall of the explosion tube corresponding to the flame propagation path is provided with a first glass window for a spectrum acquisition probe to shoot an explosion spectrum, a second glass window and a third glass window for transmitting light of a schlieren instrument, and a fourth glass window for a high-speed camera to shoot the flame propagation process and the flame shape, and the side wall of the explosion tube is also provided with a plurality of pressure sensors which are sequentially arranged along the flame propagation direction; after the igniter ignites the gas in the explosion tube, workers can record the gas explosion and explosion suppression macroscopic and microscopic processes according to the data acquired by the spectrum acquisition probe, the high-speed camera, the schlieren instrument and the pressure sensors, compare and integrate the acquired data, and further more accurately acquire the relationship between the gas explosion and explosion suppression macroscopic process and the microscopic mechanism.)

1. The gas explosion and explosion suppression experimental device is characterized by comprising an explosion tube, wherein an igniter used for igniting gas in the explosion tube is arranged in the explosion tube, a first glass window used for shooting explosion spectra by a spectrum acquisition probe, a second glass window and a third glass window which are arranged oppositely and used for transmitting light rays of a schlieren instrument and a fourth glass window used for shooting flame propagation process and flame shape by a high-speed camera are arranged on the side wall of the explosion tube corresponding to a flame propagation path, and a plurality of pressure sensors which are sequentially arranged along the flame propagation direction are further arranged on the side wall of the explosion tube.

2. The gas explosion and suppression experiment device according to claim 1, wherein a plurality of the first glass windows are arranged and arranged in sequence along the flame propagation direction, and the first glass windows are arranged between adjacent pressure sensors.

3. The gas explosion and explosion suppression experimental device according to claim 1 or 2, wherein the detonation tube has a square structure, the first glass window, the second glass window, the third glass window and the fourth glass window are respectively disposed on four circumferential side walls of the detonation tube, the first glass window, the second glass window, the third glass window and the fourth glass window respectively include through holes and planar glass plates which are disposed on the side walls of the detonation tube, the area of the planar glass plates is larger than that of the through holes, and the planar glass plates are connected to the side walls of the detonation tube through flanges.

4. A gas explosion and explosion suppression experiment device according to claim 3, wherein the igniter is disposed at the center of the bottom of the inner cavity of the squib, and the vertical center line of the through hole coincides with the vertical center line of the sidewall of the squib where the through hole is located.

5. A gas explosion and explosion suppression experiment device according to claim 3, wherein a Teflon liner plate is sandwiched between the planar glass plate and the side wall of the detonation tube.

6. A gas explosion and explosion suppression experiment device according to claim 3, wherein the material of the flat glass plate is borosilicate, and the thickness of the flat glass plate is 12 mm.

7. The gas explosion and explosion suppression experiment device according to claim 1, wherein a pressure relief opening is formed in the upper end of the explosion tube, and the explosion tube and the pressure relief opening are both made of stainless steel.

8. The gas explosion and explosion suppression experiment device according to claim 1, further comprising a gas distribution unit for distributing gas into the explosion tube, wherein the gas distribution unit comprises a vacuum pump, a gas distribution valve and a gas circulation pump, the vacuum pump is communicated with the inner cavity of the explosion tube, the gas distribution valve is arranged on the explosion tube, an output pipe of the gas circulation pump is communicated with the bottom of the inner cavity of the explosion tube, and a return pipe of the gas circulation pump is communicated with the top of the inner cavity of the explosion tube.

9. The gas explosion and explosion suppression experimental device according to claim 1, further comprising a dust explosion suppression unit for injecting a dust explosion suppression agent into the explosion tube, wherein the dust explosion suppression unit comprises a gas pressurization mechanism and a powder storage tank for storing the dust explosion suppression agent, the gas pressurization mechanism is communicated with the bottom of the inner cavity of the explosion tube through a pressurization pipeline, the powder storage tank is arranged above the pressurization pipeline, and a discharge port is arranged at the lower end of the powder storage tank and communicated with the pressurization pipeline through a pipeline.

10. An experimental method of a gas explosion and explosion suppression experimental device is characterized by comprising the following steps:

s1: sealing the pressure relief port, starting a vacuum pump, and vacuumizing the explosion tube;

s2: after the vacuumizing is finished, the vacuum pump is closed, the combustible gas is injected into the explosion tube through the gas distribution valve, and the gas circulating pump is started to circulate the combustible gas; when the explosion suppression effect of the dust explosion suppression agent needs to be measured, after the combustible gas is injected and before the gas circulating pump is started, the gas pressurization mechanism is started, and the high-pressure gas carries the dust explosion suppression agent entering the pressurization pipeline to enter the explosion pipe;

s3: after the explosion tube is filled with experimental gas obtained by fully mixing combustible gas and dust explosion suppressant, closing a gas circulating pump, starting an igniter for ignition, and measuring explosion data by using a spectrum acquisition probe, a high-speed camera, a schlieren instrument and a plurality of pressure sensors when the igniter is ignited;

s4: the staff can collect the gas explosion and explosion suppression process according to the information obtained by the spectrum acquisition probe, the high-speed camera, the receiver and the pressure sensors, and can deeply analyze the relationship between the gas explosion and explosion suppression macro process and the micro mechanism according to the information;

s5: and opening the pressure relief port to relieve pressure.

Technical Field

The invention relates to the technical field of gas explosion and explosion suppression research, in particular to a gas explosion and explosion suppression experimental device and an experimental method thereof.

Background

Gas explosion (including combustible liquid vapor explosion) is one of the main forms of explosion disasters in the fields of industrial production and life, and with the vigorous development of petrochemical industry and coal industry, the construction of large gas storage facilities and the exploitation of various large coal mines, the frequent occurrence of gas, oil tank and gas explosion accidents has attracted wide attention of various countries in the world.

At present, most of research on gas explosion reaction is completed in an explosion experiment cavity, gas with a certain concentration is filled into the explosion experiment cavity, the explosion is ignited and initiated through an ignition device, the explosion limit of combustible gas is researched through adjusting the parameters of the filled gas, and the influence of one or two factors such as initial temperature, pressure, ignition energy, inert gas, area and quantity of pipeline obstacles on the explosion limit can also be researched through additionally arranging a heater, a pressurizer and the like, for example, the invention patent with the application number of '201610738964.5', named as 'combustible gas explosion parameter testing device' discloses a gas explosion experimental device, which comprises an explosion cavity for explosive reaction of combustible gas, a vacuumizing system for vacuumizing the explosion cavity, a gas supply system for adding combustible gas into the explosion cavity, and a heating system for heating the combustible gas in the explosion cavity, The ignition system is used for igniting the combustible gas in the explosion cavity, the data acquisition system is used for testing the explosion pressure of the combustible gas in the explosion cavity, and the tail gas treatment system is used for discharging and treating waste gas generated after the combustible gas explodes in the explosion cavity.

Therefore, there is a need for a gas explosion and explosion suppression experimental device capable of precisely acquiring gas explosion and explosion suppression processes and further analyzing the relationship between the macroscopic process and the microscopic mechanism of the gas explosion and explosion suppression.

Disclosure of Invention

The invention aims to provide a gas explosion and explosion suppression experimental device and an experimental method thereof, which are used for solving the problems in the prior art, can accurately acquire the gas explosion and explosion suppression process and can deeply analyze the relationship between the macroscopic process and the microscopic mechanism of the gas explosion and explosion suppression.

In order to achieve the purpose, the invention provides the following scheme: the invention provides a gas explosion and explosion suppression experimental device which comprises an explosion tube, wherein an igniter used for igniting gas in the explosion tube is arranged in the explosion tube, a first glass window used for shooting an explosion spectrum by a spectrum acquisition probe, a second glass window and a third glass window which are arranged oppositely and used for transmitting light of a schlieren instrument and a fourth glass window used for shooting a flame propagation process and a flame shape by a high-speed camera are arranged on the side wall of the explosion tube corresponding to a flame propagation path, and a plurality of pressure sensors which are sequentially arranged along the flame propagation direction are also arranged on the side wall of the explosion tube.

Preferably, the first glass windows are provided with a plurality of first glass windows, the first glass windows are sequentially arranged along the flame propagation direction, and the first glass windows are arranged between the adjacent pressure sensors.

Preferably, the explosion tube is of a square structure, the first glass window, the second glass window, the third glass window and the fourth glass window are respectively arranged on four circumferential side walls of the explosion tube, the first glass window, the second glass window, the third glass window and the fourth glass window respectively comprise through holes arranged on the side walls of the explosion tube and a plane glass plate, the area of the plane glass plate is larger than that of the through holes, and the plane glass plate is connected to the side walls of the explosion tube through flanges.

Preferably, the igniter is arranged at the center of the bottom of the inner cavity of the explosion tube, and the vertical center line of the through hole is superposed with the vertical center line of the side wall of the explosion tube where the through hole is located.

Preferably, a polytetrafluoroethylene liner plate is clamped between the plane glass plate and the side wall of the explosion tube.

Preferably, the material of the plane glass plate is borosilicate, and the thickness of the plane glass plate is 12 mm.

Preferably, the upper end of the explosion tube is provided with a pressure relief opening, and the explosion tube and the pressure relief opening are made of stainless steel.

Preferably, the explosion tube gas distribution device further comprises a gas distribution unit for distributing gas to the explosion tube, wherein the gas distribution unit comprises a vacuum pump, a gas distribution valve and a gas circulating pump, the vacuum pump is communicated with the inner cavity of the explosion tube, the gas distribution valve is arranged on the explosion tube, an output pipe of the gas circulating pump is communicated with the bottom of the inner cavity of the explosion tube, and a return pipe of the gas circulating pump is communicated with the top of the inner cavity of the explosion tube.

Preferably, still including be used for to the intraductal dust that sprays dust explosion suppression agent of explosion presses down the unit, dust explosion suppression unit includes gaseous booster mechanism and is used for storing the storage powder jar of dust explosion suppression agent, gaseous booster mechanism pass through the pressure boost pipeline with explosion intraductal chamber bottom is linked together, the storage powder jar sets up pressure boost pipeline top, the lower extreme of storing up the powder jar is provided with the discharge gate, the discharge gate pass through the pipeline with pressure boost pipeline communicates mutually.

The invention also provides an experimental method of the gas explosion and explosion suppression experimental device, which comprises the following steps:

s1: sealing the pressure relief port, starting a vacuum pump, and vacuumizing the explosion tube;

s2: after the vacuumizing is finished, the vacuum pump is closed, the combustible gas is injected into the explosion tube through the gas distribution valve, and the gas circulating pump is started to circulate the combustible gas; when the explosion suppression effect of the dust explosion suppression agent needs to be measured, after the combustible gas is injected and before the gas circulating pump is started, the gas pressurization mechanism is started, and the high-pressure gas carries the dust explosion suppression agent entering the pressurization pipeline to enter the explosion pipe;

s3: after the explosion tube is filled with experimental gas obtained by fully mixing combustible gas and dust explosion suppressant, closing a gas circulating pump, starting an igniter for ignition, and measuring explosion data by using a spectrum acquisition probe, a high-speed camera, a schlieren instrument and a plurality of pressure sensors when the igniter is ignited;

s4: the staff can collect the gas explosion and explosion suppression process according to the information obtained by the spectrum acquisition probe, the high-speed camera, the receiver and the pressure sensors, and can deeply analyze the relationship between the gas explosion and explosion suppression macro process and the micro mechanism according to the information;

s5: and opening the pressure relief port to relieve pressure.

Compared with the prior art, the invention has the following technical effects:

1. in the invention, a first glass window, a second glass window, a third glass window and a fourth glass window are arranged on the side wall of an explosion tube corresponding to a flame propagation path, after an igniter ignites the gas in the explosion tube, a spectrum acquisition probe acquires the spectrum information when the gas explodes through the first glass window, a high-speed camera shoots the flame propagation process and the flame shape through the fourth glass window, a receiver receives the emitted light of a schlieren instrument sequentially penetrating through the second glass window, the gas in the explosion tube and the third glass window for reacting the gas density change, a plurality of pressure sensors measure the pressure change in the flame spreading process, and a worker can study the gas explosion and explosion suppression process from different directions according to the data acquired by each instrument, compare and integrate the acquired data, and deeply analyze the relationship between the macroscopic process and the microscopic mechanism of the gas explosion and explosion suppression according to the data, and because the arrangement of each glass window does not destroy the integral structure of the explosion tube, the device can still be used for testing the explosion limit under different conditions.

2. In addition, the mode that the first glass window is arranged between the adjacent pressure sensors is adopted, so that the pressure change measured by the pressure sensors and the explosion spectrum change collected by the spectrum collection probe are directed at the flame in the same propagation area, and the data of the pressure change measured by the pressure sensors and the explosion spectrum change collected by the spectrum collection probe can be correspondingly processed during the subsequent data comparison and integration period, thereby being beneficial to improving the accuracy of the finally obtained data.

3. According to the invention, the explosion tube is arranged to be of a square structure, each glass window comprises the through hole formed in the side wall of the explosion tube and the flat glass plate, the area of the flat glass plate is larger than that of the through hole, so that glass can be conveniently installed on the side wall of the explosion tube through the flange, the larger the flat glass plate is, namely the larger the contact area between the flat glass plate and the side wall of the explosion tube is, the better the sealing effect is improved, and in addition, the arrangement of the flat glass plate enables each instrument to better penetrate through the glass to obtain the internal information of the explosion tube.

4. The igniter is arranged at the center of the bottom of the inner cavity of the explosion tube, and the vertical center line of the through hole is superposed with the vertical center line of the side wall of the explosion tube where the through hole is arranged, so that the distances between all devices for acquiring flame propagation data from different directions and the center path of flame are ensured to be the same, further the flame propagation conditions aimed at by different devices during measurement are basically the same, the subsequent comparison and integration of the data acquired by different devices are facilitated, and the accuracy of the relationship between the finally acquired gas explosion and explosion suppression macroscopic process and the microscopic mechanism is further improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.

FIG. 1 is a schematic structural diagram of an experimental apparatus for gas explosion and explosion suppression according to the present invention;

wherein, 1, an explosion tube; 2. a second glass window; 3. a first glass window; 4. a pressure sensor; 5. a flat glass plate; 6. a pressure relief port; 7. a handle; 8. a gas circulation pump; 9. a vacuum pump; 10. a gas pressurization mechanism; 11. a powder storage tank.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention aims to provide a gas explosion and explosion suppression experimental device and an experimental method thereof, which are used for solving the problems in the prior art and deeply analyzing the relationship between the macroscopic process and the microscopic mechanism of gas explosion and explosion suppression;

in order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

Referring to fig. 1, an experimental apparatus for gas explosion and explosion suppression is provided, which includes an explosion tube 1, an igniter disposed in the explosion tube 1 for igniting the gas in the explosion tube 1, a first glass window 3 disposed on a side wall of the explosion tube 1 corresponding to a flame propagation path and used for a spectrum acquisition probe to capture an explosion spectrum, a second glass window 2 and a third glass window disposed opposite to each other and used for transmitting light of a schlieren instrument, and a fourth glass window for a high-speed camera to capture a flame propagation process and a flame shape, preferably, the lowest ends of light transmission regions of the first glass window 3, the second glass window 2, the third glass window and the fourth glass window should be lower than an ignition end of the igniter, all windows can be photographed to the ignition end for ignition, the highest end is close to an upper plane of the explosion tube 1, a certain installation position is reserved to ensure the spectrum acquisition probe, the schlieren instrument, The high-speed camera can obtain more comprehensive information and more completely obtain data of gas explosion and explosion suppression processes, the side wall of the explosion tube 1 is also provided with a plurality of pressure sensors 4 which are sequentially arranged along the flame propagation direction, preferably, the pressure sensors 4 are positioned on the same straight line, the first pressure sensor 4 corresponds to the ignition end of the igniter, and the pressure sensor 4 at the tail end corresponds to the tail end of the flame propagation path, so that the pressure change in the whole flame propagation process can be obtained; after the igniter ignites the gas in the explosion tube 1, the spectrum acquisition probe acquires the spectrum information of the gas explosion and explosion suppression process through the first glass window 3, the high-speed camera shoots the flame propagation process and the flame shape through the fourth glass window, the receiver receives the emitted light of the schlieren instrument after sequentially penetrating the second glass window 2, the gas in the explosion tube 1 and the third glass window for reacting the gas density change, the pressure sensors 4 measure the pressure change in the flame propagation process, a worker can research the relationship between the gas explosion and explosion suppression macroscopic process and the microscopic mechanism from different directions according to the data acquired by the instruments, compare and integrate the acquired data, further more accurately acquire the relationship between the gas explosion and explosion suppression macroscopic process and the microscopic mechanism, and the whole structure of the explosion tube 1 is not damaged due to the arrangement of the glass windows, the device can still be used for testing the explosion limit under different conditions.

The first glass windows 3 are provided with a plurality of first glass windows which are sequentially arranged along the flame propagation direction, and can acquire the change of the explosion spectrum along the flame propagation direction in the flame propagation process, thereby improving the accuracy of the relationship between the finally obtained gas explosion and explosion suppression macroscopic process and the microscopic mechanism, in addition, the first glass window 3 is arranged between the adjacent pressure sensors 4, so that the pressure change measured by the pressure sensors 4 and the explosion spectrum change collected by the spectrum acquisition probe are directed to flames in the same propagation region, and then during subsequent data contrast, integration, can be with both data correspondence processing, be favorable to improving the gas explosion that finally obtains and suppress the relation accuracy between explosion macroscopic process and the micro mechanism, preferably, the straight line that a plurality of pressure sensor 4 are located coincides with the central line of a plurality of first glass window 3.

The arrangement of several first glass windows 3 can also be used to measure the explosion spectrum of a certain area during the propagation of the flame, for example: when the explosion spectrum of the ignition end is required to be obtained, the spectrum acquisition probe is only required to be aligned to the first glass window 3 corresponding to the ignition end, and the spectrometer probe is required to be flush with the ignition end.

The corresponding positions of each detector, such as a spectrum acquisition probe, a schlieren instrument and a high-speed camera, can be automatically adjusted according to the explosion mechanism of a specific stage to be acquired, wherein the spectrum acquisition probe, the schlieren instrument and the high-speed camera all correspond to the ignition end to acquire data, and the data acquired by the pressure sensor 4 corresponding to the ignition end is matched to measure the explosion data at the explosion moment and in the explosion induction period, so that the corresponding explosion mechanism is further obtained.

The explosion tube 1 is of a square structure, the first glass window 3, the second glass window 2, the third glass window and the fourth glass window are respectively arranged on four circumferential side walls of the explosion tube 1, the first glass window 3, the second glass window 2, the third glass window and the fourth glass window respectively comprise through holes arranged on the side walls of the explosion tube 1 and a plane glass plate 5, the area of the plane glass plate 5 is larger than that of the through holes, so that the glass can be conveniently arranged on the side walls of the explosion tube 1 through flanges, and the larger the plane glass plate 5 is, that is, the larger the contact area between the flat glass plate 5 and the side wall of the squib 1, the more advantageous the sealing effect, so that the flat glass plate 5 having the same size as the side wall of the squib 1 can be selected, in addition, the flat glass plate 5 is arranged, so that each instrument can better obtain the internal information of the explosion tube 1 through the glass.

The igniter is arranged at the center of the bottom of the inner cavity of the explosion tube 1, the vertical center line of the through hole is superposed with the vertical center line of the side wall of the explosion tube 1 where the through hole is positioned, so that the distance between each device for acquiring gas explosion and explosion suppression process data from different directions and the center path of flame is ensured to be the same, the gas explosion conditions aimed at when different devices are measured are basically the same, the subsequent comparison and integration of the data acquired by different devices are facilitated, and the accuracy of the relation between the finally acquired gas explosion and explosion suppression macroscopic process and the microscopic mechanism is further improved.

Because can produce certain vibration when exploding in the blast pipe 1, in order to avoid plane glass board 5 by the vibration damage, press from both sides between the lateral wall of glass board and blast pipe 1 and be equipped with the tetrafluoro backing plate, when providing the damping effect for plane glass board 5, because its self characteristic, can improve the sealed effect between blast pipe 1 and plane glass board 5.

In order to ensure that the flat glass plate 5 can bear the impact in the explosion tube 1, the glass plate must be made of a material with high temperature resistance and high physical strength, such as high borosilicate, and the thickness of the flat glass plate 5 can be reduced appropriately according to the type of explosion, so that the light transmittance is stronger, and the thickness of the glass plate is 12 mm.

The upper end of the explosion tube 1 is provided with a pressure relief opening 6, so that the pressure in the explosion tube 1 is released after the experiment is completed, the top of the pressure relief opening 6 is provided with a handle 7, and the explosion tube 1 and the pressure relief opening 6 are made of stainless steel or other high-temperature and high-pressure resistant materials.

The invention is also provided with a gas distribution unit for distributing gas into the explosion tube 1, the gas distribution unit comprises a vacuum pump 9, a gas distribution valve and a gas circulating pump 8, the vacuum pump 9 is communicated with the inner cavity of the explosion tube 1 and is used for vacuumizing the explosion tube 1 before the explosion tube 1 is filled with gas to avoid the influence of the air left inside on the concentration of the injected gas, a vacuum meter is arranged on a pipeline connected with the explosion tube 1 by the vacuum pump 9, the gas distribution valve is arranged on the explosion tube and is used for injecting the combustible gas into the explosion tube 1 after the vacuum pump 9 is vacuumized, an output pipe of the gas circulating pump 8 is communicated with the bottom of the inner cavity of the explosion tube 1, a backflow pipe of the gas circulating pump 8 is communicated with the top of the inner cavity of the explosion tube 1, after the vacuum pump 9 is vacuumized, the combustible gas is injected into the explosion tube 1 by using a container such as an air bag and the like through the gas distribution valve, the gas circulating pump 8 circulates the combustible gas, the combustible gas is fully and uniformly dispersed in the explosion tube 1, and combustible gas with different concentrations can be injected in a plurality of experiments, so that the explosion limit can be tested.

The combustible gas may be a mixture of methane and air, or other types of gas, and the methane and air may be externally premixed and then injected into the squib 1, or may be injected into the squib 1 in batches.

The dust explosion suppression device is also provided with a dust explosion suppression unit for spraying dust explosion suppression agent into the explosion tube 1, the dust explosion suppression unit comprises a gas pressurization mechanism 10 and a powder storage tank 11 for storing the dust explosion suppression agent, the gas pressurization mechanism 10 is communicated with the bottom of the inner cavity of the explosion tube 1 through a pressurization pipeline, the powder storage tank 11 is arranged above the pressurization pipeline, the lower end of the powder storage tank 11 is provided with a discharge port, the discharge port is communicated with the pressurization pipeline through a pipeline, a pressure gauge is arranged on the pressurization pipeline, after combustible gas is injected into the explosion tube 1, the gas pressurization mechanism 10 is started, the gas pressurization mechanism 10 injects gas flow into the explosion tube 1, when the gas flow passes through the discharge port of the powder storage tank 11, the gas flow can carry the dust explosion suppression agent to enter the explosion tube 1, and then the combustible gas and the dust explosion suppression agent are circulated by using a gas circulation pump 8 to be fully mixed to form experimental gas, in the actual use process, whether the experimental gas explodes after ignition can be observed by replacing different explosion suppressants, and then the explosion suppression effect of the explosion suppressants can be judged.

The gas booster mechanism can be a gas cylinder or a gas booster pump and the like, when the gas cylinder is adopted, gas in the gas cylinder is supplied into the explosion tube 1 through high pressure, and the gas carries dust explosion suppressant to move together in the gas movement process.

The igniter can adopt a KTD-A adjustable igniter, can adjust 0.5MJ-3J, and further tests the ignited limit temperature of the combustible gas by adjusting the power of the igniter.

The invention also provides an experimental method of the gas explosion and explosion suppression experimental device, which comprises the following steps:

s1: sealing the pressure relief opening 6, starting the vacuum pump 9, and vacuumizing the explosion tube 1;

s2: after the vacuumizing is finished, the vacuum pump 9 is closed, the combustible gas is injected into the explosion tube 1 through the gas distribution valve, the gas circulating pump 8 is started, and the combustible gas is circulated by the gas circulating pump 8 and is fully and uniformly dispersed in the explosion tube 1; when the explosion suppression effect of the dust explosion suppressant needs to be measured, after the combustible gas is injected into the explosion pipe 1 and before the gas circulating pump 8 is started, the gas pressurization mechanism 10 is started, and the high-pressure gas carries the dust explosion suppressant entering the pressurization pipeline to enter the explosion pipe 1;

s3: after the explosion pipe 1 is filled with combustible gas, a gas circulating pump 8 is closed, an igniter is started to ignite, when the igniter ignites, a spectrum acquisition probe shoots internal ignition and explosion spectra through a first glass window 3, a high-speed camera shoots a flame propagation process and a flame shape through a fourth glass window, a schlieren receiver receives emitted light of the schlieren after sequentially penetrating through a second glass window 2, the gas in the explosion pipe 1 and a third glass window, the emitted light is used for reacting gas density change, and a plurality of pressure sensors 4 measure pressure change in the flame propagation process;

s4: according to the information obtained by the spectrum acquisition probe, the high-speed camera, the receiver and the pressure sensors 4, the staff researches the relationship between the gas explosion and explosion suppression macroscopic process and the microscopic mechanism from different directions, compares and integrates the obtained data, further more accurately obtains the relationship between the gas explosion and explosion suppression macroscopic process and the microscopic mechanism, and realizes the research on the relationship between the combustible gas explosion and explosion suppression macroscopic process and the microscopic mechanism;

s5: the pressure relief port 6 is opened to release the pressure.

The adaptation according to the actual needs is within the scope of the invention.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.