CN102375046B - Simulation experiment box - Google Patents

Simulation experiment box Download PDF

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Publication number
CN102375046B
CN102375046B CN201010261671.5A CN201010261671A CN102375046B CN 102375046 B CN102375046 B CN 102375046B CN 201010261671 A CN201010261671 A CN 201010261671A CN 102375046 B CN102375046 B CN 102375046B
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CN
China
Prior art keywords
firing chamber
experimental box
combustion chamber
pressure
aviation socket
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CN201010261671.5A
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Chinese (zh)
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CN102375046A (en
Inventor
李元洲
匡萃芃
徐伯乐
花荣胜
毛少华
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中国科学技术大学
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Priority to CN201010261671.5A priority Critical patent/CN102375046B/en
Publication of CN102375046A publication Critical patent/CN102375046A/en
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Publication of CN102375046B publication Critical patent/CN102375046B/en

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Abstract

The invention discloses a simulation experiment box, which is applied to a combustion test. The simulation experiment box comprises a sealed combustion chamber, a gas inlet valve, a solenoid valve, a vacuum pump, and a control panel. The sealed combustion chamber comprises a pressure sensor, an air socket and an ignition frame that is provided with an electronic igniter; two air plugs on the air socket respectively carry out power supply and data transmission on a measuring instrument in the combustion chamber. The solenoid valve is arranged at the bottom of the combustion chamber and is connected with the pressure sensor. The vacuum pump, which is arranged below the combustion chamber, is communicated with the combustion chamber through a bleeder hole and is also connected with the pressure sensor. And the control panel is used for controlling the work of the combustion chamber. According to the simulation experiment box disclosed in the embodiment of the invention, a pressure value in the experiment box can be automatically adjusted by arranging the vacuum pump and the gas inlet valve, so that it can be realized that a pressure environment in which the pressure value is the same as or is similar to a preset pressure value is simulated and experimental demands in various pressure environments can be met; meanwhile, data during the experiment process can be transmitted by the air socket, so that it is convenient to carry out studies on the combustion process.

Description

A kind of simulated experiment case
Technical field
The present invention relates to fire safety evaluating technical field, relate in particular to a kind of simulated experiment case.
Background technology
China's highlands lineament complexity, ancient building fire hazard source is numerous, and after breaking out of fire, harmfulness is very large.Because plateau fire is than plains region, there is its unique feature.If indefinite to fire characteristics, can give the control of plateau fire and put out a fire to save life and property and bring a lot of adverse influences.In prior art, be mainly by low-pressure cabinet or vacuum tank, simulate required atmospheric pressure.But realize fuel combustion characteristics under altitude environment and the research of rule, need to guarantee that pressure and the oxygen concentration of in combustion experiment process mesolow case or vacuum tank, simulating do not change, and are consistent with plateau open environment.And existing low-pressure cabinet or vacuum tank all cannot be realized above-mentioned requirements, simulate the experimental situation consistent with plateau open environment.
Summary of the invention
In view of this, the invention provides a kind of simulated experiment case, cannot simulate the problem of the experimental situation consistent with plateau open environment to solve prior art mesolow case or vacuum tank.Its concrete scheme is as described below:
A kind of simulated experiment case, is applied to burning test, comprising:
Sealed combustion chamber, described firing chamber comprises: the pressure transducer that detects described internal pressure of combustion chamber value, aviation socket, two aviation plugs on described aviation socket are powered and data transmission to the surveying instrument in firing chamber respectively, are provided with the ignition frame of ignition;
Be arranged at the gas inlet valve on chamber wall;
Be arranged at bottom, described firing chamber, the solenoid valve being connected with described pressure transducer, whether described solenoid valve exceeds preset pressure value scope according to the force value of described pressure transducer collection is carried out switching, controls described firing chamber and cuts off or UNICOM with extraneous, realizes dynamic tonifying Qi;
Be arranged at below, described firing chamber, be communicated with described firing chamber by aspirating hole, and the vacuum pump being connected with described pressure transducer, realize and dynamically bleeding;
Control the control panel of described firing chamber work.
Preferably, also comprise: be arranged at the tonifying Qi gas admittance valve that bottom, described firing chamber is in communication with the outside.
Preferably, described control panel comprises: the communication interface being connected with computing machine;
Control the button ignition switch of described ignition frame igniting;
Be connected with power supply, circuit carried out to the air conservation switch of short circuit, electric leakage and power-off protection;
The touch screen of preset pressure value in described firing chamber is set.
Preferably, on described ignition frame, be provided with cover plate.
Preferably, described firing chamber also comprises: the rotary handle being connected with described ignition frame.
Preferably, described firing chamber also comprises: be connected with described aviation socket, gather the camera of burning vision signal, described burning vision signal is exported by described aviation socket.
Preferably, described firing chamber also comprises: hermatic door, and be arranged at the dense block on described hermatic door.
Preferably, also comprise the thermopair of measuring flame temperature, described thermopair is connected with described aviation socket by acquisition module.
Preferably, also comprise: be connected with described aviation socket, gather the balance of burned amount loss percentage signal, described mass loss rate signal is exported by described aviation socket.
Preferably, described experimental box also comprises the pulley being arranged at the bottom of case.
The disclosed simulated experiment case of the embodiment of the present invention, by being set, vacuum pump and gas admittance valve constantly automatically regulate the force value in experimental box, can realize and simulate the environmental pressure identical or close with default force value, meet the experiment needs under various pressure environments, by aviation socket, the data in experimentation are transmitted simultaneously, facilitated the research to combustion process.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the disclosed simulated experiment case of the embodiment of the present invention 1;
Fig. 2 is the structural representation of the embodiment of the present invention 1 disclosed control panel;
Fig. 3 is the structural representation of the embodiment of the present invention 2 disclosed firing chambers;
Fig. 4 is the structural representation of the embodiment of the present invention 2 disclosed aviation sockets;
Fig. 5 is the inner structure schematic diagram of the embodiment of the present invention 2 disclosed taps;
The structural representation of firing chamber when Fig. 6 is the disclosed experiment of the embodiment of the present invention 2.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The invention discloses a kind of simulated experiment case, be applied to burning test, can be according to predefined force value, simulate the burning situation of the different pressures demand that meets requirement of experiment.Its embodiment is as described below:
Embodiment mono-
The structure of the disclosed simulated experiment case of the embodiment of the present invention 1 as shown in Figure 1, comprise: sealed combustion chamber 11, described firing chamber 11 comprises: be arranged on described Inner Wall of Combustion Chamber, detect the pressure transducer 111 of described internal pressure of combustion chamber value, be arranged at the aviation socket 112 in described firing chamber, two aviation plugs on described aviation socket are powered and data transmission to the surveying instrument in firing chamber respectively, are provided with the ignition frame 114 of ignition 113;
Be arranged at 11 belows, described firing chamber; the vacuum pump 12 being communicated with described firing chamber by the aspirating hole 115 on described firing chamber; because the carbon dioxide temperature after burning is higher; conventionally can be gathered in the top of firing chamber; so described aspirating hole 115 is arranged at the top of firing chamber, be convenient to discharge firing chamber.
Be arranged at outside described firing chamber 11, by the control panel 13 of firing chamber work described in multiple control knob control.The structure of control panel 13 as shown in Figure 2, comprising: the communication interface 131 being connected with computing machine; Control the button ignition switch 132 that described lighter 114 is lighted a fire; Be connected with power supply, circuit carried out to the air conservation switch 133 of short circuit, electric leakage and power-off protection; The touch screen 134 of described firing chamber 11 interior preset pressure values is set.
Be arranged at the gas inlet valve 14 on 11 walls of firing chamber, gas inlet valve 14 time is connected with extraneous Gas Pipe carrying out gaseous combustion experiment, tests to transporting combustible gases in experimental box by this gas valve.Gas inlet valve 14 is arranged on the bottom of burning conventionally, and its height, lower than the balance in firing chamber or gas burner, avoids inflammable gas to flow directly to the top of flame, affects the shape of flame, brings error to experimental data.Except this gas admittance valve, also comprise the tonifying Qi gas admittance valve 15 that is arranged at 11 bottoms, firing chamber.
Be arranged at bottom, described firing chamber, the solenoid valve 16 being connected with described pressure transducer, whether the force value that described solenoid valve 16 gathers according to described pressure transducer 111 exceeds preset pressure value scope is carried out switching, controls described firing chamber 11 and cuts off or UNICOM with extraneous;
Mobile for experimental box is convenient to, in the present embodiment, the bottom of experimental box is provided with pulley 17.View window 18 also can be set simultaneously on firing chamber, so that observation experiment process.
Take gaseous combustion experiment as example, simply introduce the course of work of this experimental box below.
First firing chamber 11 is sealed, switch on power by described air conservation switch 133, realize in the situation that guarantees combustion chamber sealing by aviation socket 113; device in firing chamber is powered; by the data in combustion process, as temperature data of flame etc., transfer out simultaneously.Set by the touch screen 134 on control panel 13 force value that this test needs simulation, and start vacuum pump 12 and make its work, when pressure in pressure transducer 111 detects firing chamber 11 reaches preset value, import inflammable gas by gas inlet valve 14, gas inlet valve is connected with gas burner, inflammable gas is incorporated into gas burner, and by the button ignition switch 132 on control panel 13, ignition 113 on reference mark range 114 is lighted after lighting a fire, in this process, to guarantee 14 air inlets of gas inlet valve, light a fire and carry out simultaneously with lighter 113.Avoid occurring because igniting is too early, in firing chamber 11, there is no inflammable gas, light a fire unsuccessful, or lighted a fire evening, the inflammable gas in firing chamber 11 is too much, and the phenomenon of the excessive spot failure firearm of heat that moment produces occurs.In combustion process, because constantly supplementing combustion gas, gas inlet valve enters firing chamber 11, in combustion process, constantly consume the oxygen in firing chamber simultaneously, produce carbon dioxide, so the pressure of firing chamber 11 can change, in order to guarantee the constant of pressure, vacuum pump 12 is always in running order, gas in firing chamber 11 is discharged by aspirating hole 115, in whole process, the force value gathering when pressure transducer 111 lower than predefined force value can allowed band time, solenoid valve 16 is opened, automatically fill into air, regulate the pressure in firing chamber 11 to return in admissible scope, the force value gathering when pressure transducer 11 higher than predefined force value can allowed band time, solenoid valve 14 cuts out.Aviation socket 112 is connected with extraneous power supply, and for the equipment such as sensor or lighter in firing chamber 11 is powered, and electric signal, data model that various device is produced are transferred to external computing machine.In combustion process, by thermopair, flame combustion chamber plume central temperature is detected, and pass through acquisition module, the signal of collection is converted into temperature signal, be transferred to space flight socket 112, and output on external computing machine by space flight socket 112, analyze and store.Gaseous combustion amount in combustion process can be calculated by the gas meter being connected with described burner being arranged on gas admittance valve, is convenient to follow-up research.In the time that combustion experiment finishes, to blanketing gas in firing chamber, make its internal pressure identical with external pressure by tonifying Qi gas admittance valve 15, then open sealed combustion chamber, finish experiment.
In said process, the mode of the sealing that firing chamber 11 is carried out can be the mode of employing hermatic door, or adopts other sealing means, as long as realizing the device of combustion chamber sealing, is all the scope of protection of the invention.
The disclosed experimental box of the present embodiment can be simulated scene under different pressures condition, carries out gaseous combustion characteristic test, thereby for preventing and putting out gas fire theoretical support is provided.The experimental box that the present embodiment does not limit this structure can only carry out gaseous combustion experiment, can carry out equally liquid combustion experiment.
Embodiment bis-
The structure of the disclosed experimental box of the present embodiment is identical with embodiment 1 entirety, just the structure of firing chamber has been done some improvement, the structure of the disclosed firing chamber of the present embodiment as shown in Figure 3, except comprising: pressure transducer 311, aviation socket 312, be provided with the ignition frame 314 of ignition 313 with outside the aspirating hole 315 being connected with vacuum pump, also comprise: be arranged at the cover plate on described ignition frame 314, cover plate can prevent having volatile flammable liquid, as fuel oil evaporate in firing chamber in the time testing, while causing igniting, flame is excessive, the function of burn out point firearm, comprise the rotary handle 316 being connected with described ignition frame simultaneously, by regulating described rotary handle 316, cover plate can be stirred, adjust the position of ignition frame simultaneously, guarantee the normal operation of igniting, the camera 317 being connected with described aviation socket 312, for recording dynamic flame combustion process, gathers the image data in combustion experiment.Firing chamber in the present embodiment seals by hermatic door 318, on described hermatic door 318, is provided with dense block 319.
Also comprise the illuminating lamp 3110 being arranged on described camera 317 simultaneously, for good luminance brightness is provided in firing chamber, is convenient to observation experiment process and takes experimentation.
The structure of the aviation socket 312 in the present embodiment is as shown in Figure 4: comprise attaching plug 3121 and data pin 3122, realize respectively power supply and the data transmission of surveying instrument.As shown in Figure 5, the two ends difference connecting power line of probe 51 is as attaching plug, or connection data line is as data pin, realizes the transmission of inside and outside of firing chamber power supply and data by probe for the inner connecting structure of its plug.Centre seals by sealing gasket 52.
Can also in firing chamber, pop one's head in 3111 by set temperature, to gather the temperature in firing chamber simultaneously.
With regard to liquid combustion experiment, introduce the course of work of the disclosed experimental box of the present embodiment below:
In firing chamber according to the good thermopair frame 61 of cloth shown in Fig. 6, oil tray 62 and electronic balance 63, be connected with described aviation socket 312 respectively, the temperature data of thermopair collection is transferred to aviation socket 312 by data acquisition module simultaneously, the burned amount loss percentage signal that electronic balance 63 gathers is also transferred to aviation socket 312, then output to outside firing chamber, in oil tray 62, pour appropriate methyl alcohol into, build the cover plate on ignition frame 314, control the height of ignition 313 both positive and negative polarities and methyl alcohol liquid level well.With sealing door lock 319, hermatic door 318 is locked.By air conservation switch connection power supply, set target, pressure value and make vacuum pump in running order by the touch-screen on control panel.When the force value in firing chamber reaches while setting pressure, press automatic ignition button, light methyl alcohol, then rotation igniting rotary handle 316 is removed lighter 313, just can carry out the synchronous transmission of combustion experiment and data.The camera 317 being connected with described aviation socket 312, for recording dynamic flame combustion process, gathers the image data in combustion experiment.After experiment finishes, stop the work of vacuum pump, open tonifying Qi gas admittance valve 32 and put into fresh air and just can open hermatic door 318 to firing chamber to normal pressure.
The disclosed experimental box of the present embodiment can be realized the oil sump fire burning test of the Multi liquid fuel under hypoxemia low pressure condition, and the combustion characteristics of the oil sump fire under research different pressures condition, for plateau fire fireproof fire-extinguishing technology provides theoretical support.Meanwhile, the present embodiment does not limit it can only carry out liquid combustion experiment, and it can carry out gaseous combustion experiment equally, and its experimentation as described in example 1 above.
The disclosed simulated experiment case of the embodiment of the present invention at least has the following advantages:
(1) simulation test case disclosed by the invention, utilize vacuum pump, the mode of solenoid valve and sensor interlock, in the time that pressure exceeds the required pressure of experiment, vacuum pump is extracted gas in chamber out, pressure is controlled under the required pressure of experiment, and in the time that pressure decreased exceedes certain limit, by putting into certain air with the solenoid valve of sensor interlock, make its pressure return to required pressure limit, constantly supplement inflammable gas by gas inlet valve simultaneously, guarantee that the oxygen concentration in firing chamber is certain, guarantee the constant of pressure in firing chamber and oxygen concentration, improve the degree of accuracy of experiment.
(2) in simulated experiment case disclosed by the invention, by the mode of cover plate is set on igniting rack, while having prevented volatile liquid burning, cause the problem of the excessive burn out point firearm of ignition point flame to occur owing to evaporating, improved the security of experiment.
(3) in simulation test case disclosed by the invention,, in the situation that guaranteeing combustion chamber sealing, by the collection real-time data in experimentation, and transmit by aviation socket, abundant data are provided, be convenient to carry out follow-up study.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment, between each embodiment identical similar part mutually referring to.For the disclosed device of embodiment, because it corresponds to the method disclosed in Example, so description is fairly simple, relevant part illustrates referring to method part.
To the above-mentioned explanation of the disclosed embodiments, make can realize or use+the present invention of professional and technical personnel in the field.To the multiple modification of these embodiment for those skilled in the art by be apparent+, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims (8)

1. an environmental simulation experimental box, is characterized in that, is applied to burning test, comprising:
Sealed combustion chamber, described firing chamber comprises: the pressure transducer that detects described internal pressure of combustion chamber value, aviation socket, two aviation plugs on described aviation socket are powered and data transmission to the surveying instrument in firing chamber respectively, are provided with the ignition frame of ignition;
Be arranged at the gas inlet valve on chamber wall;
Be arranged at bottom, described firing chamber, the solenoid valve being connected with described pressure transducer, whether described solenoid valve exceeds preset pressure value scope according to the force value of described pressure transducer collection is carried out switching, controls described firing chamber and cuts off or UNICOM with extraneous, realizes dynamic tonifying Qi;
Be arranged at below, described firing chamber, be communicated with described firing chamber by aspirating hole, and the vacuum pump being connected with described pressure transducer, realize and dynamically bleeding;
Control the control panel of described firing chamber work;
Be arranged at the tonifying Qi gas admittance valve that bottom, described firing chamber is in communication with the outside;
Described control panel comprises: the communication interface being connected with computing machine;
Control the button ignition switch of described ignition frame igniting;
Be connected with power supply, circuit carried out to the air conservation switch of short circuit, electric leakage and power-off protection;
The touch screen of preset pressure value in described firing chamber is set.
2. experimental box according to claim 1, is characterized in that, on described ignition frame, is provided with cover plate.
3. experimental box according to claim 2, is characterized in that, described firing chamber also comprises: the rotary handle being connected with described ignition frame.
4. experimental box according to claim 3, is characterized in that, described firing chamber also comprises: be connected with described aviation socket, gather the camera of burning vision signal, described burning vision signal is exported by described aviation socket.
5. experimental box according to claim 4, is characterized in that, described firing chamber also comprises: hermatic door, and be arranged at the dense block on described hermatic door.
6. experimental box according to claim 5, is characterized in that, also comprises the thermopair of measuring flame temperature, and described thermopair is connected with described aviation socket by acquisition module.
7. experimental box according to claim 6, is characterized in that, also comprises: be connected with described aviation socket, gather the balance of burned amount loss percentage signal, described mass loss rate signal is exported by described aviation socket.
8. according to the experimental box described in any one in claim 1-7, it is characterized in that, described experimental box also comprises the pulley being arranged at the bottom of case.
CN201010261671.5A 2010-08-18 2010-08-18 Simulation experiment box CN102375046B (en)

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