CN212568571U - Experimental device for research combustible gas deflagration is released - Google Patents
Experimental device for research combustible gas deflagration is released Download PDFInfo
- Publication number
- CN212568571U CN212568571U CN202021490238.4U CN202021490238U CN212568571U CN 212568571 U CN212568571 U CN 212568571U CN 202021490238 U CN202021490238 U CN 202021490238U CN 212568571 U CN212568571 U CN 212568571U
- Authority
- CN
- China
- Prior art keywords
- explosion
- combustible gas
- container
- deflagration
- cylindrical anti
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The utility model provides an experimental device for research combustible gas deflagration is released, whole experimental device make a video recording and data acquisition system including releasing explosion container, distribution premixing device, adjustable ignition system and high-speed schlieren. The experimental device can be used for experimental research on deflagration discharge of premixed combustible gas by analyzing the pressure of a broken membraneP v And a barrierO bs Area of explosion ventingA v Coefficient of bleedingK v Explosion venting conduitR s Concentration of gas componentφStatic operating pressureP stat Degree of initial turbulenceIniturIgnition energyE d Ignition positionIgnlocThe influence of the factors on the overpressure transient and flame behavior of the deflagration release of the combustible gas is explored, and the synergistic effect of a typical overpressure peak value and deflagration flame is explored.
Description
Technical Field
The utility model relates to an experimental apparatus for research combustible gas deflagration is released belongs to combustible gas and lets out and explode security research technical field.
Background
Combustible gases are widely used in industrial processes, particularly chemical and petrochemical processes. In most cases, flammable gases are sealed in enclosed spaces, and devices such as reactors, reaction vessels, storage tanks, pipes, etc. are commonly used to store or transport such gases. Once the device equipment has defects or human factors, air is mixed in the device to form a combustible gas mixture and reach the explosion limit, gas explosion accidents can occur when ignition sources are met, and serious property loss and casualties are caused. If the industrial gas explosion can be correctly known in advance and the explosion accident rule can be mastered, the method for preventing and avoiding the disaster is correctly adopted, and the method has important practical significance for industrial safety production.
The combustible gas deflagration release is a technology for leading burnt high-pressure mixed gas in a chamber or a container into the external environment in time through a fixed explosion release device so as to rapidly reduce the internal pressure, can effectively avoid larger disasters caused by the explosion of the chamber or the container due to explosion overpressure, and ensures the safety of equipment and facilities. The deflagration discharge of the combustible gas is a complex unsteady process coupling turbulent flow and oscillation combustion of the combustible medium, and a plurality of overpressure peak structures are easily formed in the deflagration discharge process, so that certain difficulties are brought to deflagration discharge design and protection. Therefore, the research on the coupling mechanism of flame instability and explosion overpressure in the deflagration release process can reveal the explosion propagation rule of combustible gas, prevent and control combustion and explosion accidents, and provide reference for the engineering explosion-proof safety design.
Disclosure of Invention
The utility model aims at designing an experimental device for studying combustible gas deflagration relief overpressure transient and flame behaviorThe rupture pressure can be analyzed by experimentP v And a barrierO bs Area of explosion ventingA v Coefficient of bleedingK v Explosion venting conduitR s Concentration of gas componentφStatic operating pressureP stat Degree of initial turbulenceIniturIgnition energyE d Ignition positionIgnlocThe influence of the factors on overpressure transient and flame behavior of combustible gas deflagration discharge reveals the distribution characteristics of the overpressure relief peak value of premixed combustible gas deflagration discharge in the limited space and the formation mechanism of the peak structure, and explores the typical overpressure peak value (the peak value formed by explosion relief opening)P b Peak value of external explosion formationP ext Peak value of maximum flame area of explosion chamberP red The peak value formed by combustion flame oscillation caused by interaction of explosion chamber structure and sound waveP ac ) Synergistic effect with deflagration flames.
The utility model adopts the following technical scheme: an experimental device for researching deflagration release of combustible gas is characterized by comprising an explosion release container, a gas distribution premixing device, an adjustable ignition system and a high-speed schlieren shooting and data acquisition system. The explosion venting container comprises a cylindrical anti-explosion container and a plurality of flange covers. 3 screw holes which can be connected with a high-energy ignition rod, a high-frequency pressure sensor and a flame sensor are respectively arranged at the bottom, the middle and the upper part of the wall surface of the cylindrical anti-explosion container, and a pumping/charging valve is arranged at the bottom of the wall surface forming a central angle of 90 degrees with the screw holes and is used for pumping vacuum and charging premixed combustible gas into the cylindrical anti-explosion container; clamping explosion venting diaphragms with different rupture pressures between the cylindrical anti-explosion container and flange covers with different explosion venting areas by using high-strength bolts, and plugging rubber plugs on the outer sides of openings of the flange covers at the top parts to ensure that the cylindrical anti-explosion container can be completely sealed; the top of the cylindrical anti-explosion container can be completely opened, a plurality of small holes for fixing obstacles are reserved on the bottom surface and the wall surface of the inner wall surface of the cylindrical anti-explosion container, and the influence of stirring paddles and the like in a similar reactor on the deflagration discharge process of combustible gas is truly simulated by additionally arranging various types of obstacle accessories; the middle position of the cylindrical anti-explosion container, which is provided with the preset screw hole and faces the wall surface, is connected with an explosion venting short pipe and is provided with a plurality of flange sheets with different explosion venting areas, so that experimental research on explosion venting of the combustible gas lateral conduit can be carried out. The gas distribution premixing device consists of a special digital display mass flowmeter for standard gas and balance gas and a premixing cavity, combustible gas with components of specified concentration and premixed combustible gas mixed with inert gas are prepared through a flow control switch, and the premixed combustible gas is filled into the cylindrical anti-explosion container through a pumping/inflating valve. The adjustable ignition system charges the built-in capacitor by using alternating current, changes the ignition energy of the high-energy ignition rod by adjusting the voltage of the capacitor, and respectively designs two high-energy ignition rods with different lengths according to two conditions of ignition of the high-energy ignition rod at the wall surface position and the middle position in the cylindrical anti-explosion container. The high-speed schlieren shooting and data acquisition system comprises a high-speed camera, a schlieren optical device and a synchronous data acquisition instrument, wherein a pair of schlieren concave-convex mirror surfaces of the schlieren optical device are arranged in an outer flow field of an explosion vent at the top of the cylindrical anti-explosion container, pass through a schlieren light source, a focusing lens 1, pass through a schlieren edge after passing through the concave-convex mirror surfaces, and finally enter the high-speed camera through a focusing lens 2, so that a time sequence schlieren image of an external flow field such as explosion-venting jet flame and the like can be shot; the synchronous data acquisition instrument is connected with the high-frequency pressure sensor and the flame sensor, can acquire pressure dynamic and flame signal data in the combustible gas explosion venting process in real time, and the high-frequency pressure sensor and the flame sensor can be installed at any reserved screw hole positions of the cylindrical anti-explosion container according to experimental requirements.
The cylindrical anti-explosion container has strong bearing capacity and high safety coefficient, and can be used for carrying out experimental research on deflagration discharge of combustible gas on safety engineering standards at home and abroad, such as NFPA 68, EN 14994 and the like. Different rupture pressures are additionally arranged between the cylindrical anti-explosion container and the top flange coverP v The explosion venting membrane is connected by a high-strength bolt, and a rubber plug is plugged on the outer side of the opening of the flange cover at the top part, so that the cylindrical anti-explosion container can be completely sealed; the vacuum pump is connected with an air pumping/charging valve at the bottom of the cylindrical anti-explosion container for vacuum pumping, and a high-frequency pressure sensor is usedThe vacuum and seal were monitored. The cylindrical antiknock container has its top opened completely by detaching the flange cover, and various kinds of obstacle fittings inside it for obstacleO bs Experimental study on the influence of deflagration release of combustible gas; the designed top explosion venting flange cover has a plurality of opening sizes, and can carry out the explosion venting of combustible gas at different explosion venting areasA v And coefficient of bleed-offK v Explosion venting experiment research under the condition; the method comprises the steps that a reserved small shallow hole is formed in the outer wall surface of a top flange cover, a high-frequency pressure sensor and a flame sensor are fixed, and the pressure dynamic state and the flame signal of an explosion venting outer flow field are monitored; the explosion venting short pipe is designed in the middle of the wall surface of the cylindrical anti-explosion container and is connected with the explosion venting guide pipes with different sizes to develop the explosion venting guide pipeR s Experimental study on the influence of deflagration release of combustible gas.
The gas distribution premixing device selects a special digital display mass flow meter, combustible gas with required multi-component concentration is mixed in advance in a premixing cavity by adjusting the flow opening of standard gas and balance gas, the combustible gas is filled into cylindrical anti-explosion containers with different vacuumizing degrees through a pumping/filling valve until the cylindrical anti-explosion containers are in a normal pressure/overpressure/low pressure state, the standing time of the combustible gas in the cylindrical anti-explosion containers is changed, combustible gas with different initial turbulence degrees can be formed, and the combustible gas with different gas component concentrations can be developedφStatic operating pressureP stat Degree of initial turbulenceIniturExperimental study on the influence of deflagration release of combustible gas.
The adjustable ignition system adopts alternating current to charge the built-in capacitor, realizes adjustable ignition energy by adjusting voltage input, adds high-energy ignition rods with different lengths at different screw holes of the cylindrical anti-explosion container, and realizes different ignition energy according to the stretching length of the high-energy ignition rodsE d Ignition positionIgnlocExperimental study on the influence of deflagration release of combustible gas.
The high-speed schlieren camera system consists of a high-speed camera and a schlieren optical device, is synchronously controlled with the adjustable ignition system, when the density of the explosion venting outflowing flow field of combustible gas is uneven, light emitted by the schlieren light source is deflected through the flow field, the illumination on the objective lens of the high-speed camera is changed along with the deflection, and then the density change of the flow field is displayed, and the high-speed camera records a first-order derivative distribution image of the density of the flow field, so that the shape and the position of the flame and the pressure wave of; the data acquisition system comprises a high-frequency pressure sensor and a flame sensor, and the pressure and flame inside and outside the explosion venting of the combustible gas are acquired and recorded in real time through a synchronous data acquisition instrument. Therefore, the high-speed schlieren shooting and data acquisition system can obtain a flame time sequence schlieren graph, an explosion venting pressure curve and a flame intensity signal, and the image data can be used for analyzing the flame zone structure and the combustion explosion characteristics in the deflagration and discharge process of the combustible gas, representing the flow field structure change of the combustion reaction zone and exploring the double coupling mechanism of explosion venting overpressure and flame in the deflagration and discharge process of the combustible gas.
The experimental device for researching deflagration discharge of combustible gas is characterized in that a high-frequency pressure sensor, a flame detector and a high-speed camera are matched with a schlieren optical device to acquire data images of pressure, flame, an external flow field and the like of a cylindrical anti-detonation container in the deflagration discharge process, so that the pressure, the flame, the external flow field and the like can be obtainedP v 、O bs 、A v 、K v 、R s 、φ、P stat 、Initur、E d 、IgnlocThe influence characteristics of the factors on the explosion and the relief overpressure of the combustible gas and the flame provide ideas for the explosion and relief experiment research of the combustible gas.
The beneficial effects of the utility model are that.
(1) The utility model provides an experimental apparatus for be used for studying combustible gas deflagration and release can gather the record to important characteristic parameter such as pressure, flame and image of combustible gas deflagration and release in-process, just the utility model discloses an experimental apparatus has better expansibility, can artificially control experiment environment and experimental conditions as required.
(2) The utility model discloses utilize high frequency pressure sensor monitoring deflagration to release the pressure dynamic rising characteristic of in-process, flame sensor obtains deflagration release in-process flame burning intensity to combine the schlieren image that high-speed camera cooperation schlieren optical device caught, the analysis combustible gas deflagration is released the superpressure and is linked up with the flame coupling, carries out deep research to aspects such as the superpressure peak value of combustible gas deflagration release process and flame propagation dynamics.
(3) The utility model discloses a cylindrical antiknock container, the combustible gas concentration component allotment method and the data image acquisition system that provide can develop rupture of membranes pressure, barrier, let out and explode the area, release the coefficient, let out and explode pipe, gas component concentration, static action pressure, initial torrent degree, ignition energy, the influence research of factors such as ignition position to the superpressure transient and the flame action that combustible gas deflagration was released.
Drawings
Fig. 1 is a schematic view of the overall experimental apparatus of the present invention.
Fig. 2 is a front view and a plan view of the cylindrical antiknock container of the present invention.
Wherein: 1-a cylindrical antiknock container; 2-a flange cover; 3-a high-energy ignition rod; 4-a high frequency pressure sensor; 5-a flame sensor; 6-pumping/inflating valve; 7-explosion venting membrane; 8-rubber plug; 9-explosion venting short pipe; 10-a flange sheet; 11-a gas distribution premixing device; 12-an adjustable ignition system; 13-a high-speed camera; 14-synchronous data acquisition instrument; 15-schlieren concave-convex mirror surface; 16-schlieren light source; 17-focusing lens 1; 18-schlieren edge; 19-focusing lens 2.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The utility model discloses an experimental device for gaseous deflagration of research is released, whole experimental device make a video recording and data acquisition system including releasing explosion container, distribution premixing device, adjustable ignition system and high-speed schlieren. The utility model provides an let out and explode container adopts Q345R steel, design bearing capacity 20 MPa, including a cylindrical antiknock container and a plurality of open-top flange lid thereof. Inner straight of cylindrical antiknock containerThe diameter is 250 mm, the height is 350 mm, and the length-diameter ratio D/L = 1.4. The bottom, the middle and the upper part of the right side of the wall surface of the cylindrical anti-explosion container in the vertical direction are provided with 3 screw holes of M20 multiplied by 1.5 which are respectively 50mm, 120 mm and 200 mm away from the bottom, a high-energy ignition rod, a high-frequency pressure sensor and a flame sensor can be connected at will, the wall surface forming a 90-degree central angle with the high-energy ignition rod, the high-frequency pressure sensor and the flame sensor is provided with a screw hole of M14 multiplied by 1.5, an angle type stop valve connected with DN5 is used as a pumping/charging valve which is 50mm away from the bottom, and the pumping/charging valve is used for pumping vacuum and charging premixed combustible. The opening size of the top opening flange cover comprisesφ=200 mm、φ=175 mm、φ=150 mm、φ=125 mm、φ=100 mm、φ=75 mm、φ=50 mm、φ8 flat flange covers with the thickness of 20 mm, and the cover surface (namely the periphery of the explosion venting port) of the top flange cover is reservedφA shallow hole of =5 mm for fixing the high-frequency pressure sensor and the flame sensor. The explosion venting membrane with different membrane rupture pressures, such as a PVC sheet, is clamped between the cylindrical anti-explosion container and the flange covers with different explosion venting areas by utilizing high-strength bolts, a rubber plug is plugged outside an opening of the flange cover at the top, and the rubber plug is synchronously processed according to the size of the opening, so that the cylindrical anti-explosion container can be completely sealed. The middle position of the left side wall surface of the cylindrical anti-explosion container is connected with an explosion venting short pipe with the length L =75 mm and the diameterφ=50mm, provided with an opening sizeφ=50 mm、φ=40 mm、φ=30 mm、φ=20 mm、φ5 flange pieces of =10 mm, and the explosion venting short pipe can be connected into explosion venting guide pipes with different length sizes. The flange cover at the top of the cylindrical anti-explosion container can be completely opened, and a plurality of parts are reserved on the bottom surface and the wall surface of the inner wall surface of the cylindrical anti-explosion containerφThe device comprises a shallow hole of =5 mm, which is used for fixing obstacles with different structural sizes and truly simulating scenes such as stirring paddles in similar reactors.
The gas distribution premixing device consists of a special digital display mass flowmeter for standard gas and balance gas and a premixing cavity, combustible gas with components of specified concentration and premixed combustible gas mixed with inert gas are prepared through a flow control switch, and the premixed combustible gas is filled into the cylindrical anti-explosion container through a pumping/inflating valve. The range of standard gas (i.e. combustible gas such as methane, carbon monoxide, hydrogen and the like) is 0-1 SLPM (liter per minute in a standard state), the range of balance gas (i.e. carrier gas such as air, nitrogen, inhibitor and the like) is 0-3 SLPM, the flow regulation precision is 0.1, and the concentration of the combustible gas which can be proportioned is illustrated by way of example.
If methane is mixed with air to form methane/air premixed gas, the concentration of methane can be adjusted within the range: when the methane controls the flow output of 0.1 SLPM and the air controls the flow output of 3 SLPM, the lowest methane concentration is output after the methane is mixed with the airφ= 0.1/(0.1 + 3) = 3.23%; on the contrary, when the flow rate of the methane control 1 SLPM is output and the flow rate of the air control 0.3 SLPM is output, the highest methane concentration is output after the methane is mixed with the airφ= 1/(1 + 0.3)) = 76.92%; therefore, the concentration of methane which can be mixed by methane/air is 3.23% -76.92%, the explosion limit range of methane is covered, and the flow switches of the standard gas and the balance gas of the gas distribution premixing device are regulated and controlled according to the vacuumizing degree of the cylindrical anti-explosion container and the concentration of combustible gas required by the final experiment by adopting a Dalton partial pressure principle, and the cylindrical anti-explosion container is filled to a negative pressure state.
The adjustable ignition system charges the built-in capacitor through alternating current, ignition energy of the high-energy ignition rod is changed by adjusting voltage of the capacitor, and the ignition energy is E =0.5CU2The adjustable ignition system is characterized in that the adjustable ignition system is provided with a KTD-A ignition device, the ignition capacity is adjustable within the range of 3-20J, a synchronous control interface is arranged and connected with a high-speed camera, and a high-energy ignition rod comprises two specifications of 125 mm and 20 mm in length and can ignite on the wall surface position and the inner space position of the cylindrical anti-explosion container. The high-speed schlieren shooting and data acquisition system consists of a high-speed camera, a schlieren optical device and a synchronous data acquisition instrument, wherein the high-speed camera is Phantom V7.3 type, the highest shooting speed is 190476 fps, and the high-speed camera is synchronously controlled by a trigger switch of an adjustable ignition system. Using standard schlieren optics "ZThe light path of the schlieren concave-convex mirror surface is arranged in the external flow field of the top explosion venting port of the cylindrical anti-explosion container, the schlieren light source is a iodine tungsten lamp, and the light source emits lightThe light passes through the small hole to form a light source, passes through the focusing lens 1, passes through the schlieren edge after passing through the concave-convex mirror surface, and finally enters the high-speed camera through the focusing lens 2. The synchronous data acquisition instrument is connected with the high-frequency pressure sensor and the flame sensor, and the TS-HP6300 dynamic signal acquisition instrument is selected as the synchronous data acquisition instrument and can acquire pressure dynamic data and flame signal data in the deflagration releasing process. Because the combustion and explosion speed of the premixed combustible gas in the deflagration discharge process is high, and the experiment duration is short, a high-frequency pressure sensor with quick response is selected; meanwhile, the combustion explosion has instantaneous higher temperature, so a flame detector for preventing high-temperature combustion is selected. The high-frequency pressure sensor in the experimental device selects a CY400 type pressure sensor to monitor the dynamic overpressure released by deflagration, the measuring range of the high-frequency pressure sensor is 0-5 MPa, and the nonlinearity FS is<0.5%, natural frequency>400 KHz; a CKG100 type flame sensor is selected as a flame sensor for detecting deflagration flame propagation signals, a visible light response spectrum of the flame sensor is 340 nm-980 nm, the response time is less than or equal to 100 mu s, and experimental data are recorded in real time through a TS-HP6300 dynamic signal acquisition instrument and matched software. The high-frequency pressure sensor and the flame sensor can be arranged at any reserved screw hole position of the cylindrical anti-explosion container according to the experimental requirement.
The utility model provides an experimental apparatus for research superpressure transient and flame action that combustible gas deflagration was released through high frequency pressure sensor, flame sensor and high-speed camera cooperation schlieren optical device, carries out the collection record of data image to pressure, flame and outer flow field etc. of cylindrical antiknock container deflagration release process. The high-frequency pressure sensor and the flame sensor are utilized to monitor the inner and outer pressure dynamics and flame signal parameters in the deflagration releasing process of the cylindrical anti-detonation container, and the coupling mechanisms of explosion releasing overpressure and flame in the deflagration releasing process of the combustible gas, including overpressure caused by Helmholtz resonance, Rayleigh-Taylor instability of flame and the like, can be analyzed by combining an outer flow field schlieren time sequence diagram captured by the high-speed camera and the schlieren optical device. The device can be used for the research on the deflagration discharge overpressure and flame characteristics of the combustible gas under a plurality of influencing factors, for example, different rupture membrane pressures can be developedP v Deflagration relief test under conditionsAnd also can study the obstacles separatelyO bs Area of explosion ventingA v Coefficient of bleedingK v Explosion venting conduitR s Concentration of gas componentφStatic operating pressureP stat Degree of initial turbulenceIniturIgnition energyE d Ignition positionIgnlocThe influence of the factors on overpressure transient and flame behavior of combustible gas deflagration discharge is analyzed, the distribution characteristics of the overpressure peak value of the premixed combustible gas deflagration discharge and the formation mechanism of the peak structure are analyzed, and a typical overpressure peak value (the peak value formed by explosion discharge opening) is exploredP b Peak value of external explosion formationP ext Peak value of maximum flame area of explosion chamberP red The peak value formed by combustion flame oscillation caused by interaction of explosion chamber structure and sound waveP ac ) Synergistic effect with deflagration flames.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the scope of the present invention in any way, and all technical solutions obtained by using equivalent substitution modes and the like fall within the scope of the present invention.
The utility model discloses the part that does not relate to all is the same with prior art or can adopt prior art to realize.
Claims (5)
1. An experimental device for researching deflagration release of combustible gas is characterized by comprising an explosion release container, a gas distribution premixing device, an adjustable ignition system and a high-speed schlieren camera shooting and data acquisition system; the explosion venting container comprises a cylindrical anti-explosion container (1) and a plurality of flange covers (2), 3 screw holes which can be connected with a high-energy ignition rod (3), a high-frequency pressure sensor (4) and a flame sensor (5) are respectively arranged at the bottom, the middle and the upper part of the wall surface of the cylindrical anti-explosion container (1), and a pumping/charging valve (6) is arranged at the bottom of the wall surface forming a 90-degree central angle with the screw holes and is used for pumping vacuum and charging premixed combustible gas into the cylindrical anti-explosion container (1); clamping explosion venting diaphragms (7) with different membrane breaking pressures between the cylindrical anti-explosion container (1) and flange covers (2) with different explosion venting areas by using high-strength bolts, and plugging rubber plugs (8) on the outer sides of openings of the flange covers at the top parts to ensure that the cylindrical anti-explosion container (1) can be completely sealed; the top of the cylindrical anti-explosion container (1) can be completely opened, a plurality of small holes for fixing obstacles are reserved on the bottom surface and the wall surface of the inner wall surface of the cylindrical anti-explosion container, and the influence of stirring paddles and the like in a similar reactor on the deflagration discharge process of combustible gas is truly simulated by additionally arranging various types of obstacle accessories; the middle position of the cylindrical anti-explosion container (1) opposite to the wall surface by presetting a screw hole is connected with an explosion venting short pipe (9) and is provided with a plurality of flange sheets (10) with different explosion venting areas, so that experimental research on explosion venting of the combustible gas lateral conduit can be carried out; the gas distribution premixing device (11) consists of a special digital display mass flowmeter and a premixing cavity for standard gas and balance gas, combustible gas with components of specified concentration and combustible gas mixed with inert gas are prepared through a flow control switch, and the combustible gas and the inert gas are filled into the cylindrical anti-explosion container (1) through a pumping/inflating valve (6); the adjustable ignition system (12) charges a built-in capacitor through alternating current, the ignition energy of the high-energy ignition rod (3) is changed by adjusting the voltage of the capacitor, and two high-energy ignition rods (3) with different lengths are respectively designed according to two conditions of ignition of the high-energy ignition rod (3) at the wall surface position and the middle position in the cylindrical anti-explosion container (1); the high-speed schlieren shooting and data acquisition system comprises a high-speed camera (13), a schlieren optical device and a synchronous data acquisition instrument (14), wherein a pair of schlieren concave-convex mirror surfaces (15) of the schlieren optical device are arranged on an external flow field of an explosion vent at the top of the cylindrical anti-explosion container, pass through a schlieren light source (16) and a focusing lens (1), (17), pass through a schlieren edge (18) after passing through the concave-convex mirror surfaces, and finally enter the high-speed camera through a focusing lens (2), (19) so as to shoot time sequence schlieren graphs of the external flow field such as explosion venting jet flow flame and the like; synchronous data acquisition instrument (14) are connected high frequency pressure sensor (4) and flame sensor (5), can gather combustible gas in real time and let out the pressure dynamics and the flame signal data of exploding the in-process, and high frequency pressure sensor (4) and flame sensor (5) can be installed it at the arbitrary reservation screw position of cylindrical antiknock container (1) according to the experimental needs.
2. An experimental device for studying deflagration release of combustible gas according to claim 1, characterized in that different rupture pressures are additionally arranged between the cylindrical anti-detonation container (1) and the top flange cover (2)P v The explosion venting membrane (7) is connected by high-strength bolts, and a rubber plug (8) is plugged on the outer side of the opening of the top flange cover (2) to ensure that the cylindrical anti-explosion container (1) can be completely sealed; a vacuum pump is connected with a pumping/inflating valve (6) at the bottom of the cylindrical anti-explosion container (1) for pumping vacuum, and a high-frequency pressure sensor (4) is used for monitoring the vacuum degree and the sealing property; the top of the cylindrical anti-explosion container (1) can be completely opened by disassembling the top flange cover (2), and various barrier accessories are additionally arranged in the cylindrical anti-explosion container for carrying out barriersO bs Experimental study on the influence of deflagration release of combustible gas; the designed top explosion venting flange cover (2) has a plurality of opening sizes, and can carry out the explosion venting of combustible gas in different explosion venting areasA v Coefficient of bleedingK v Explosion venting experiment research under the condition; a reserved small shallow hole is formed in the outer wall surface of the top flange cover (2), a high-frequency pressure sensor (4) and a flame sensor (5) are fixed, and the pressure dynamic and flame signals of an explosion venting outer flow field are monitored; the explosion venting short pipe (9) is designed in the middle of the wall surface of the cylindrical anti-explosion container and is connected with explosion venting guide pipes with different sizes to develop the explosion venting guide pipeR s Experimental study on the influence of deflagration release of combustible gas.
3. The experimental device for researching deflagration discharge of combustible gas according to claim 1, wherein the gas distribution premixing device (11) selects a special digital display mass flowmeter, mixes the combustible gas with required multicomponent concentration in the premixing cavity in advance by adjusting the flow opening degree of the standard gas and the balance gas, and fills different vacuumizing strokes through the pumping/charging valve (6)The cylindrical anti-explosion container (1) is filled until the cylindrical anti-explosion container (1) is in a normal pressure/overpressure/low pressure state, the standing time of combustible gas in the cylindrical anti-explosion container (1) is changed, combustible gas with different initial turbulence degrees can be formed, and different gas component concentrations can be developedφStatic operating pressureP stat Degree of initial turbulenceIniturExperimental study on the influence of deflagration release of combustible gas.
4. The experimental device for researching deflagration and release of combustible gas according to claim 1, wherein the adjustable ignition system (12) adopts alternating current to charge a built-in capacitor, and ignition energy is adjustable by adjusting voltage input; high-energy ignition rods (3) with different lengths are additionally arranged at different screw holes of the cylindrical anti-explosion container (1), and different ignition energies are realized according to the extension lengths of the high-energy ignition rodsE d Ignition positionIgnlocExperimental study on the influence of deflagration release of combustible gas.
5. The experimental device for researching the deflagration release of combustible gas according to claim 1, characterized in that, the high-speed schlieren camera system is composed of a high-speed camera (13) and a schlieren optical device, and is synchronously controlled with the adjustable ignition system (12); when the density of an explosion venting outflowing flow field of combustible gas is not uniform, light emitted by a schlieren light source (16) deflects through the flow field, the illumination on an objective lens of a high-speed camera is changed along with the deflection, the density change of the flow field is further displayed, and a first-order derivative distribution image of the density of the flow field is recorded by the high-speed camera (13), so that the shapes and the positions of flame and pressure wave of the explosion venting outflowing flow field are recorded; the data acquisition system comprises a high-frequency pressure sensor (4) and a flame sensor (5), and the pressure inside and outside the explosion venting of the combustible gas and the flame are acquired and recorded in real time through a synchronous data acquisition instrument (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021490238.4U CN212568571U (en) | 2020-07-26 | 2020-07-26 | Experimental device for research combustible gas deflagration is released |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021490238.4U CN212568571U (en) | 2020-07-26 | 2020-07-26 | Experimental device for research combustible gas deflagration is released |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212568571U true CN212568571U (en) | 2021-02-19 |
Family
ID=74631296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021490238.4U Active CN212568571U (en) | 2020-07-26 | 2020-07-26 | Experimental device for research combustible gas deflagration is released |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212568571U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111678947A (en) * | 2020-07-26 | 2020-09-18 | 宁波工程学院 | Design and application of combustible gas deflagration discharge experimental device |
| CN114199938A (en) * | 2021-12-14 | 2022-03-18 | 南京工业大学 | Experimental system and testing method for simulating storage tank leakage |
| CN114813405A (en) * | 2022-05-06 | 2022-07-29 | 南京工业大学 | Petrochemical device rupture disk failure form and bursting performance detection test device and method under dynamic load |
-
2020
- 2020-07-26 CN CN202021490238.4U patent/CN212568571U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111678947A (en) * | 2020-07-26 | 2020-09-18 | 宁波工程学院 | Design and application of combustible gas deflagration discharge experimental device |
| CN114199938A (en) * | 2021-12-14 | 2022-03-18 | 南京工业大学 | Experimental system and testing method for simulating storage tank leakage |
| CN114199938B (en) * | 2021-12-14 | 2023-09-26 | 南京工业大学 | Experimental system and method for simulating leakage of storage tank |
| CN114813405A (en) * | 2022-05-06 | 2022-07-29 | 南京工业大学 | Petrochemical device rupture disk failure form and bursting performance detection test device and method under dynamic load |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212568571U (en) | Experimental device for research combustible gas deflagration is released | |
| CN111678947A (en) | Design and application of combustible gas deflagration discharge experimental device | |
| CN102879429B (en) | Testing system for gas explosion characteristic size effect | |
| Zhang et al. | Hazard evaluation of explosion venting behaviours for premixed hydrogen-air fuels with different bursting pressures | |
| CN202870016U (en) | Test system for size effect of gas explosion characteristics | |
| CN101477094B (en) | Experimental device for restraining gas and dust explosion by water mist | |
| Dai et al. | On the explosion characteristics for central and end-wall ignition in hydrogen-air mixtures: A comparative study | |
| Li et al. | Visualization of spontaneous ignition and flame behavior in tubes with and without obstacles during the high-pressure hydrogen release | |
| CN112666309A (en) | High-pressure combustor experimental system and visual high-pressure combustor | |
| Wang et al. | Effect of a single orifice plate on methane-air explosion in a constant volume vessel: Position and blockage ratio dependence | |
| Pan et al. | Effects of top vent locations and gasoline volumes on vented gasoline vapor explosion in closed small-scale vessel | |
| CN107870180A (en) | The test system of gas burst feature structure effect | |
| Mével et al. | Fundamental combustion properties of oxygen enriched hydrogen/air mixtures relevant to safety analysis: Experimental and simulation study | |
| Ji et al. | Experimental investigation into the vented hybrid mixture explosions of lycopodium dust and methane | |
| Jiang et al. | Experimental investigations on the external pressure during venting | |
| CN114813405A (en) | Petrochemical device rupture disk failure form and bursting performance detection test device and method under dynamic load | |
| CN209803041U (en) | Half open space gas explosion's experimental system | |
| Zhang et al. | Experimental investigation of the vented propane-air explosion characteristics at elevated static activation pressures in a large L/D duct | |
| Zhou et al. | Experimental study of explosion parameters of hybrid mixture caused by thermal runaway of lithium-ion battery | |
| Zhuang et al. | Effect of concentration, obstacles, and ignition location on the explosion overpressure of hydrogen-air in a closed-vessel | |
| Pan et al. | Influences of multi vents’ numbers and distributions on vented ethanol-gasoline vapor deflagrations | |
| Mogi et al. | Propagation of blast waves from a bursting vessel with internal hydrogen-air deflagration | |
| CN213364765U (en) | Portable combustible gas explosion experimental device | |
| CN115901858A (en) | Experimental device and experimental method for explosion characteristics of hydrogen-doped natural gas in limited space | |
| Leyer et al. | Unconfined deflagrative explosion without turbulence: experiment and model |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |