Apparatus and method for simulating material ignition characteristics in a reduced gravity environment

Abstract

The application discloses a device and a method for simulating ignition characteristics of materials in a low-gravity environment, comprising a base, an equivalent gravity adjusting mechanism, an inter-plate distance adjusting mechanism, a reaction chamber, a partition auxiliary heating mechanism and an ignition module, wherein the equivalent gravity adjusting mechanism comprises a fixed plate; the inter-plate distance adjusting mechanism comprises a support assembly and a distance adjusting assembly which are installed on the fixed plate; the reaction chamber comprises a transparent top plate and a transparent bottom plate, the transparent bottom plate is installed on the support assembly, and the edge portion between the transparent top plate and the transparent bottom plate is provided with a porous material; the partition auxiliary heating mechanism is arranged on the transparent top plate and the transparent bottom plate respectively, and the partition auxiliary heating mechanism is connected with an auxiliary heating controller; the ignition module is arranged between the transparent top plate and the transparent bottom plate, and the ignition module is connected with a direct-current power supply; and the base is provided with an equivalent gravity indicating assembly. The application can flexibly simulate a low-gravity environment under a ground normal gravity condition, support long-period stable experiments, and greatly reduce experimental cost.

Description

Technical Field

[0001] This invention relates to the field of combustion experimental equipment technology, and in particular to a device and method for simulating the ignition characteristics of materials under varying low gravity environments. Background Technology

[0002] In the fields of aerospace, combustion science, and materials safety, low-gravity simulation experimental devices for solid material combustion are crucial equipment for studying the combustion characteristics of solid combustibles under unconventional gravity environments such as space, the moon, and Mars. Currently, mainstream experimental methods for achieving microgravity environments include drop towers, parabolic aircraft, remote sensing satellites, and space station combustion test chambers. However, these methods have significant limitations, such as short testing time, high cost, and high difficulty. Drop tower devices (such as the microgravity drop tower at the Institute of Mechanics, Chinese Academy of Sciences) generate a microgravity environment through the free fall of the experimental chamber. Its core structure consists of a tall tower, a descent pipe, and a recovery system, providing microgravity time of up to 5 seconds. However, due to the height limitation of the tower, it is difficult to observe long-term experimental phenomena of material combustion, and each experiment requires extensive preparation and is costly. Parabolic aircraft experiments provide approximately 20 seconds of microgravity time through parabolic flight, but their flight costs are high, preparation cycles are long, and cabin vibration and temperature fluctuations can interfere with the combustion process, easily distorting flame morphology data. While space station combustion test chambers (such as the International Space Station ACME project) can observe combustion behavior under real microgravity for extended periods, the opportunity to conduct these experiments is limited by the space station mission schedule and the high cost of payload launches. Furthermore, the experimental conditions are limited to a single microgravity mode, making it impossible to simulate differentiated gravity scenarios such as the Moon (0.17g) and Mars (0.38g).

[0003] Due to the limitations of existing microgravity experiments, it is usually necessary to simulate microgravity conditions in a terrestrial environment, such as low-pressure chamber experiments and narrow-channel methods. However, these experimental methods that simulate microgravity by reducing natural convection can only be applied to the study of steady-state combustion processes, and are difficult to effectively simulate and reproduce transient combustion processes such as ignition and extinction under low gravity environments. Therefore, this invention provides an apparatus and method for simulating the ignition characteristics of materials under varying low gravity environments. Summary of the Invention

[0004] The purpose of this invention is to provide an apparatus and method for simulating the ignition characteristics of materials under varying low gravity environments, so as to solve the problems existing in the prior art.

[0005] To achieve the above objectives, the present invention provides the following solution: The present invention provides an apparatus for simulating the ignition characteristics of materials under varying low gravity environments, comprising:

[0006] Base;

[0007] An equivalent gravity adjustment mechanism, comprising a fixed plate, wherein the fixed plate is hinged to the top surface of the base via a positioning assembly;

[0008] A plate-to-plate distance adjustment mechanism, comprising a support assembly and a spacing adjustment assembly mounted on the fixed plate;

[0009] A reaction chamber, comprising a transparent top plate and a transparent bottom plate, the transparent bottom plate being mounted on the support assembly, the transparent top plate being mounted on the spacing adjustment assembly, and the edge portion between the transparent top plate and the transparent bottom plate being provided with a porous material;

[0010] A partitioned auxiliary heating mechanism is provided, wherein the partitioned auxiliary heating mechanism is respectively arranged on the transparent top plate and the transparent bottom plate, and the partitioned auxiliary heating mechanism is connected to the auxiliary heating controller;

[0011] An ignition module is arranged between the transparent top plate and the transparent bottom plate, and the ignition module is connected to a DC power supply.

[0012] An equivalent gravity indicator component is installed on the base.

[0013] According to the apparatus for simulating the ignition characteristics of materials under varying low gravity environments provided by the present invention, the support assembly includes:

[0014] The bracket is fixed to the fixing plate;

[0015] Two sets of baffles are vertically fixed on the fixed plate, and gaskets are fixed on the baffles. The transparent base plate is supported by the gaskets and the bracket.

[0016] The baffle is equipped with a distance scale.

[0017] According to the apparatus for simulating the ignition characteristics of materials under varying low gravity environments provided by the present invention, the spacing adjustment component includes:

[0018] The screw is provided in two sets, and the two sets of screws are symmetrically and vertically fixed on the fixing plate.

[0019] The mounting plate has a slot on one side, the screw passes through the mounting plate, and two sets of locking nuts are threaded onto the screw. The mounting plate is positioned between the two sets of locking nuts, and the transparent top plate is inserted into the slot.

[0020] A fixing bolt is threaded onto the mounting plate and abuts against the transparent top plate.

[0021] According to the apparatus for simulating the ignition characteristics of materials under varying low gravity environments provided by the present invention, the partitioned auxiliary heating mechanism includes:

[0022] The heating wires are provided in four sets on the top surface of the transparent top plate and the bottom surface of the transparent bottom plate, and the four sets of heating wires are arranged at equal intervals around the circumference.

[0023] The heating wire is connected to the auxiliary heating controller, and a black high-temperature resistant plate is provided on the bottom surface of the transparent base plate. The heating wire is disposed between the transparent base plate and the black high-temperature resistant plate.

[0024] According to the apparatus for simulating the ignition characteristics of materials under varying low gravity environments provided by the present invention, the ignition module includes:

[0025] The terminal block is provided in two sets. The transparent top plate and the transparent bottom plate are respectively provided with mounting holes at their center positions. The terminal block is inserted into the mounting holes respectively. The terminal block is provided with a through groove at its center position.

[0026] A heating rod, the two ends of which are respectively inserted into the through slots of the two sets of terminals;

[0027] A fixing screw is threaded onto the side wall of the terminal block, and the positioning screw has a limiting fit with the heating rod;

[0028] The two sets of terminals are respectively connected to the positive and negative terminals of the DC power supply.

[0029] The apparatus for simulating the ignition characteristics of materials under varying low gravity environments according to the present invention further includes:

[0030] An insulated lower positioning rod is fixed to the fixed plate. The insulated lower positioning rod has an L-shaped structure, and its top end is fixed to the terminal block at the center of the bottom surface of the transparent base plate.

[0031] An insulating upper positioning rod is fixed to the mounting plate, and one end of the insulating upper positioning rod is fixed to the terminal block at the center of the top surface of the transparent top plate.

[0032] According to the device for simulating the ignition characteristics of materials under varying low gravity environments provided by the present invention, the positioning component includes a metal damping hinge, the base and the fixing plate are hinged together by the metal damping hinge, and a hinge locking nut is installed on the metal damping hinge.

[0033] According to the apparatus for simulating the ignition characteristics of materials under varying low gravity environments provided by the present invention, the equivalent gravity indicating component includes:

[0034] An equivalent gravity scale, which is fixed on the base;

[0035] A scale pointer is fixed on the fixed plate, and the scale pointer is arranged corresponding to the equivalent gravity scale.

[0036] A method for simulating the ignition characteristics of materials under varying low gravity environments includes the following steps:

[0037] Step 1: Initial setup and preparation of the apparatus. Place the base on the horizontal experimental platform and ensure its stability. Check the equivalent gravity adjustment mechanism. Ensure that the fixed plate is accurately hinged to the top surface of the base through the positioning component. Install the support component, transparent base plate, spacing adjustment component, and transparent top plate in sequence. Adjust the spacing between the two. Place the experimental materials. Then, seal the edges with porous material. Arrange the zoned auxiliary heating mechanism on the transparent top plate and transparent base plate and connect the wiring. Install the equivalent gravity indicator component and debug it to ensure that it displays the value normally.

[0038] Step 2, Equivalent Gravity Adjustment: Based on the low gravity environment required for the experiment, operate the positioning component to slowly rotate the fixed plate while closely monitoring the changes in the equivalent gravity indicator value. Smoothly and slowly adjust the tilt angle until the value reaches the set value. Then, use the positioning component to lock the fixed plate to ensure the stability of the low gravity environment in subsequent experiments and avoid affecting the experimental accuracy due to shaking.

[0039] Step 3: Adjust the distance between the reaction chambers. According to the characteristics and requirements of the experimental materials, operate the distance adjustment component to slowly change the distance between the transparent top plate and the transparent bottom plate, observe the changes and ensure that they are uniform and stable. Use a measuring tool to adjust the distance to the precise value. During adjustment, prevent improper distance from affecting the materials. After adjustment, check the sealing again to ensure that the porous materials are tightly fitted and maintain a stable environment inside the reaction chamber.

[0040] Step 4: Zone auxiliary heating control. Using the auxiliary heating controller, set the heating temperature and time of each zone auxiliary heating mechanism according to the experimental plan to ensure that the parameters are accurate and can be adjusted independently. Start the DC power supply to power the ignition module. Use the temperature sensor to monitor in real time during heating to ensure that the temperature is within the set range. Observe the heating status to ensure uniformity and stability. If the temperature is abnormal, adjust it in time with the controller to ensure accurate temperature conditions.

[0041] Step 5: Material ignition experiment and data recording. Start the monitoring equipment to record the ignition time and flame propagation speed of the material under low gravity and set temperature in real time. Experimenters closely observe and record any abnormal phenomena to ensure experimental safety. After the experiment, save the data and images, and perform preliminary analysis to provide a basis for studying the ignition characteristics of the material.

[0042] Step 6: Cleaning and resetting the apparatus. After the experiment, turn off the DC power supply and wait for the temperature of the reaction chamber to drop to a safe range. Remove the material residue and dispose of it properly. Use cleaning tools and reagents to thoroughly clean the transparent top plate and transparent bottom plate to remove any stains or residues. Finally, restore the apparatus to its initial state to prepare for the next experiment.

[0043] The present invention discloses the following technical effects:

[0044] The equivalent gravity adjustment mechanism allows for flexible adjustment of the simulated gravity value. Combined with the equivalent gravity indicator component, the current gravity parameters are displayed intuitively. The component of gravity along the plate plane can be used to determine the magnitude of gravity in the simulated scenario. The plate distance adjustment device balances the vertical component of the plates (which causes buoyancy flow) and avoids excessively small plate distances that lead to viscous drag. This precisely meets the experimental requirements under different low-gravity conditions, providing a reliable environmental basis for studying the ignition characteristics of materials in varying low-gravity environments.

[0045] By adjusting the distance between the plates to form a narrow channel chamber, the intensity of the gravity-induced buoyancy flow on the ground is reduced (to balance the component of actual gravity along the vertical direction of the plate), while avoiding the adverse effects of viscous resistance (the fluid will generate viscous force on the plate surface) caused by too small a distance between the plates on the experimental results.

[0046] The reaction chamber of this invention uses a transparent top and bottom plate, which facilitates real-time observation and recording of the dynamic process of material ignition (such as flame shape, spread speed, etc.). Combined with porous material at the edges, it can achieve stable gas flow and internal and external gas pressure balance in the chamber, ensuring a stable gas environment required for the ignition reaction, and improving the accuracy of experimental observation and the reliability of conditions.

[0047] The equivalent gravity indicator component of this invention can intuitively reflect the current simulated gravity state. Combined with the precise control of each adjustment mechanism, it facilitates experimenters to quickly set and monitor experimental parameters, reduce operational errors, and improve the accuracy and repeatability of experimental data. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 This is an isometric view of the device for simulating the ignition characteristics of materials under varying low gravity conditions according to the present invention.

[0050] Figure 2 This is a front view of the device for simulating the ignition characteristics of materials under varying low gravity environments according to the present invention.

[0051] Figure 3 This is a schematic diagram of the structure of the first partition auxiliary heating component of the present invention;

[0052] Figure 4 This is a schematic diagram of the reaction chamber of the present invention;

[0053] Figure 5 This is a schematic diagram of the structure of the transparent top plate of the present invention;

[0054] Figure 6 This is a schematic diagram of the inter-plate distance adjustment mechanism of the present invention;

[0055] Figure 7 This is a schematic diagram of the spacing adjustment component of the present invention;

[0056] Figure 8 This is a schematic diagram of the metal damping hinge structure of the present invention.

[0057] The components include: 1. Base; 2. Equivalent gravity adjustment mechanism; 3. Plate distance adjustment mechanism; 4. Reaction chamber; 5. Zoned auxiliary heating mechanism; 6. Equivalent gravity indicator assembly; 7. Auxiliary heating controller; 8. DC power supply; and 9. Ignition module.

[0058] 201. Fixed plate; 202. Metal damping hinge; 203. Hinge lock nut;

[0059] 301. Bracket; 302. Baffle; 303. Washer; 304. Insulating lower positioning rod; 305. Distance scale; 306. Screw; 307. Mounting plate; 308. Slot; 309. Locking nut; 310. Fixing bolt; 311. Insulating upper positioning rod;

[0060] 401. Transparent top plate; 402. Transparent bottom plate; 403. Porous material;

[0061] 501. Heating wire; 502. Wiring port;

[0062] 601. Equivalent gravity scale; 602. Scale pointer;

[0063] 901. Terminal block; 902. Heating rod; 903. Fixing screw. Detailed Implementation

[0064] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0065] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0066] Reference Figures 1-8The present invention provides a device for simulating the ignition characteristics of materials under varying low gravity environments, including a base 1;

[0067] The equivalent gravity adjustment mechanism 2 includes a fixed plate 201, which is hinged to the top surface of the base 1 via a positioning component.

[0068] The inter-plate distance adjustment mechanism 3 includes a support assembly and a spacing adjustment assembly installed on the fixed plate 201.

[0069] The reaction chamber 4 includes a transparent top plate 401 and a transparent bottom plate 402. The transparent bottom plate 402 is mounted on a support assembly, and the transparent top plate 401 is mounted on a spacing adjustment assembly. A porous material 403 is provided at the edge portion between the transparent top plate 401 and the transparent bottom plate 402.

[0070] A zoned auxiliary heating mechanism 5 is arranged on a transparent top plate 401 and a transparent bottom plate 402 respectively, and the zoned auxiliary heating mechanism 5 is connected to the auxiliary heating controller 7.

[0071] Ignition module 9 is arranged between transparent top plate 401 and transparent bottom plate 402, and ignition module 9 is connected to DC power supply 8.

[0072] The base 1 is equipped with an equivalent gravity indicator component 6.

[0073] Further optimization of the solution, supporting components include:

[0074] Bracket 301 is fixed to the fixing plate 201;

[0075] Two sets of baffles 302 are vertically fixed on the fixed plate 201. A gasket 303 is fixed on the baffle 302. The transparent base plate 402 is supported by the gasket 303 and the bracket 301.

[0076] Among them, a distance scale 305 is provided on the baffle 302.

[0077] The bracket 301 is fixed on the fixing plate 201 to provide bottom support for the transparent base plate 402 and ensure that the transparent base plate 402 is placed horizontally;

[0078] Two sets of vertically fixed baffles 302 limit the transparent base plate 402 from both sides to prevent it from shifting laterally during the experiment. The gaskets 303 on the baffles (the material may be a high-temperature resistant insulating material) are in direct contact with the transparent base plate 402, which not only avoids wear caused by direct friction between the transparent base plate 402 and the metal baffle, but also buffers vibration. The distance scale 305 is engraved on the baffle 302, which allows for a direct reading of the relative position between the edge of the transparent base plate 402 and the baffle, facilitating quick calibration of the initial position of the transparent base plate 402 and ensuring the repeatability of the experiment.

[0079] Further optimization of the solution includes the following spacing adjustment components:

[0080] Screw 306, two sets of screw 306 are provided, and the two sets of screw 306 are symmetrically and vertically fixed on the fixing plate 201;

[0081] Mounting plate 307, with a slot 308 on one side, screw 306 passing through mounting plate 307, and two sets of locking nuts 309 threaded on screw 306, mounting plate 307 positioned between the two sets of locking nuts 309, and transparent top plate 401 inserted into slot 308;

[0082] Fixing bolt 310 is threaded onto mounting plate 307 and abuts against transparent top plate 401.

[0083] Two sets of symmetrical screws 306 are vertically fixed on the fixing plate 201, providing vertical guidance for the mounting plate 307. The mounting plate 307 passes through the screws via through holes on both sides, and its height is limited by two sets of locking nuts 309 (the lower nut supports the mounting plate, and the upper nut presses it in place). The mounting plate can be moved up and down by loosening / tightening the nuts, thereby adjusting the height of the transparent top plate 401. The transparent top plate 401 is inserted into the slot 308 of the mounting plate, and the fixing bolts 310 are screwed in from the side and press against the transparent top plate 401 to prevent the transparent top plate 401 from loosening due to vibration or airflow during the experiment, and to ensure the parallelism between the transparent top plate 401 and the transparent bottom plate 402.

[0084] The scheme has been further optimized, and the zoned auxiliary heating mechanism 5 includes:

[0085] The heating wire 501 is provided in four sets on the top surface of the transparent top plate 401 and the bottom surface of the transparent bottom plate 402, with the four sets of heating wires 501 arranged at equal intervals around the circumference.

[0086] The heating wire 501 is connected to the auxiliary heat controller 7. A black high-temperature resistant plate is provided on the bottom surface of the transparent base plate 402, and the heating wire 501 is placed between the transparent base plate 402 and the black high-temperature resistant plate. The black high-temperature resistant plate facilitates the observation of the flame shape and prevents other light sources from interfering with the observation.

[0087] Four sets of heating wires 501 are arranged circumferentially at equal intervals (such as in a ring) on ​​the top surface of the transparent top plate 401 and the bottom surface of the transparent bottom plate 402. Each set of heating wires 501 corresponds to a sector-shaped area of ​​the chamber. The auxiliary heat controller 7 can independently adjust the power of each set of heating wires 501 to achieve zoned temperature control within the chamber (such as local high temperature, gradient temperature field, etc.) and perform thermal compensation under variable gravity environment.

[0088] The design has been further optimized, and ignition module 9 includes:

[0089] Terminal 901, two sets of terminal 901 are provided. The transparent top plate 401 and the transparent bottom plate 402 are respectively provided with mounting holes at the center. Terminal 901 is inserted into the mounting holes respectively. A through groove is provided at the center of terminal 901.

[0090] Heating rod 902, with both ends of heating rod 902 inserted into the through slots of two sets of terminals 901 respectively;

[0091] The fixing screw 903 is threaded onto the side wall of the terminal 901, and the positioning screw has a limiting engagement with the heating rod 902.

[0092] The two sets of terminals 901 are connected to the positive and negative terminals of the DC power supply 8, respectively.

[0093] Two sets of terminals 901 are respectively installed in the central mounting holes of the transparent top plate 401 and the transparent bottom plate 402, forming symmetrical electrodes to ensure that the ignition point is located in the center of the chamber (reducing edge effect interference); the heating rod 902 (such as high resistance alloy material) is inserted into the through slots of the terminals 901 at both ends and locked by the fixing screws 903 to ensure stable electrical connection; the DC power supply 8 supplies power to the heating rod 902 through the terminals 901, and the heating rod 902 quickly heats up to the set temperature (such as the material ignition point), directly contacting or radiating heat the material to be tested to achieve controllable ignition; the central positioning design makes the ignition point coincide with the geometric center of the chamber, ensuring the symmetry of the combustion propagation direction and improving the repeatability of experimental data.

[0094] Further optimizations to the plan include:

[0095] Insulated lower positioning rod 304 is fixed on fixed plate 201. Insulated lower positioning rod 304 has an L-shaped structure. The top of insulating lower positioning rod 304 is fixed to the terminal 901 at the center of the bottom surface of transparent base plate 402.

[0096] An insulating upper positioning rod 311 is fixed on the mounting plate 307, and one end of the insulating upper positioning rod 311 is fixed to the terminal 901 at the center of the top surface of the transparent top plate 401.

[0097] The solution is further optimized. The positioning component includes a metal damping hinge 202. The base 1 and the fixing plate 201 are hinged together by the metal damping hinge 202. A hinge locking nut 203 is installed on the metal damping hinge 202.

[0098] The hinge locking nut 203 installed on the metal damping hinge 202 can be tightened after the fixed plate 201 is adjusted to the required angle to securely lock the fixed plate 201 and the base 1 together, preventing the fixed plate 201 from changing angle due to external interference or the vibration of the device itself during the experiment, and ensuring the stability of the equivalent gravity environment.

[0099] Calculations show that the actual torque that the metal damping hinge 202 can withstand is approximately 1 N·m. The design requires a maximum hovering torque of 2.3 N·m for a single metal damping hinge 202 to ensure that the hovering angle error during the experiment is ≤1°.

[0100] The scheme has been further optimized, and the equivalent gravity indicator component 6 includes:

[0101] An equivalent gravity scale 601 is fixed on the base 1.

[0102] The scale pointer 602 is fixed on the fixed plate 201, and the scale pointer 602 is arranged corresponding to the equivalent gravity scale 601.

[0103] An equivalent gravity scale 601 fixed to the base 1 and a scale pointer 602 fixed to the fixed plate 201 work together to display the current simulated equivalent gravity value. When the fixed plate 201 rotates around the hinge, the scale pointer 602 moves along the equivalent gravity scale 601 as the fixed plate 201 rotates. By reading the scale reading corresponding to the scale pointer 602, the current simulated equivalent gravity value can be obtained intuitively, providing accurate experimental parameter information for the experimenters.

[0104] The equivalent gravity scale 601 displays the magnitude of the simulated gravitational acceleration corresponding to different hovering angles. The formula for calculating the simulated gravitational acceleration is as follows: (α is the angle between the fixed plate and the horizontal experimental platform, g is the conventional gravitational acceleration, taken as 9.80 m / s²) 2 )

[0105] A method for simulating the ignition characteristics of materials under varying low gravity environments includes the following steps:

[0106] Step 1: Initial setup and preparation of the device. Place the base 1 on the horizontal experimental table and ensure its stability. Check the equivalent gravity adjustment mechanism 2. Ensure that the fixed plate 201 is accurately hinged to the top surface of the base 1 through the positioning component. Install the support component, transparent base plate 402, spacing adjustment component, and transparent top plate 401 in sequence. Adjust the spacing between the two. Place the experimental materials. Then, seal the edges with porous material 403. Arrange the partitioned auxiliary heating mechanism 5 on the transparent top plate 401 and transparent base plate 402 and connect the wiring. Install the equivalent gravity indicator component 6 and debug it to ensure that it displays the value normally.

[0107] Step 2, equivalent gravity adjustment: Based on the low gravity environment required for the experiment, operate the positioning component to slowly rotate the fixed plate 201, while closely monitoring the value change of the equivalent gravity indicator component 6, and steadily and slowly adjust the tilt angle until the value reaches the set value. Then, use the positioning component to lock the fixed plate 201 to ensure the stability of the low gravity environment in subsequent experiments and avoid the impact of shaking factors on the experimental accuracy.

[0108] Step 3: Adjust the spacing of reaction chamber 4. According to the characteristics and requirements of the experimental materials, operate the spacing adjustment component to slowly change the spacing between the transparent top plate 401 and the transparent bottom plate 402, observe the changes and ensure uniformity and stability. Use a measuring tool to adjust the spacing to the precise value. During adjustment, prevent improper spacing from affecting the materials. After adjustment, check the sealing again to ensure that the porous material 403 is tightly attached and to maintain a stable internal environment of reaction chamber 4.

[0109] Step 4: Zone auxiliary heating control. Through the auxiliary heating controller 7, set the heating temperature and time of each zone auxiliary heating mechanism 5 according to the experimental plan to ensure that the parameters are accurate and can be adjusted independently. Start the DC power supply 8 to power the ignition module 9. Use the temperature sensor to monitor in real time during heating to ensure that the temperature is within the set range. Observe the heating status to ensure uniformity and stability. If the temperature is abnormal, adjust it in time with the controller to ensure accurate temperature conditions.

[0110] Step 5: Material ignition experiment and data recording. Start the monitoring equipment to record the ignition time and flame propagation speed of the material under low gravity and set temperature in real time. Experimenters closely observe and record any abnormal phenomena to ensure experimental safety. After the experiment, save the data and images, and perform preliminary analysis to provide a basis for studying the ignition characteristics of the material.

[0111] Step 6: Cleaning and resetting the apparatus. After the experiment, turn off the DC power supply 8 and wait for the temperature of the reaction chamber 4 to drop to a safe range. Remove the material residue and dispose of it properly. Use cleaning tools and reagents to thoroughly clean the transparent top plate 401 and transparent bottom plate 402 to remove stains and residues. Finally, restore the apparatus to its initial state to prepare for the next experiment.

[0112] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0113] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A device for simulating the ignition characteristics of materials under varying low gravity environments, characterized in that, include: Base (1); Equivalent gravity adjustment mechanism (2), the equivalent gravity adjustment mechanism (2) includes a fixed plate (201), the fixed plate (201) is hinged to the top surface of the base (1) by a positioning component, and the tilt angle of the fixed plate is adjusted by operating the positioning component to rotate the fixed plate; The inter-plate distance adjustment mechanism (3) includes a support assembly and a spacing adjustment assembly installed on the fixed plate (201); The reaction chamber (4) includes a transparent top plate (401) and a transparent bottom plate (402). The transparent bottom plate (402) is mounted on the support assembly, and the transparent top plate (401) is mounted on the spacing adjustment assembly. The edge portion between the transparent top plate (401) and the transparent bottom plate (402) is provided with a porous material (403). A partitioned auxiliary heating mechanism (5) is provided on the transparent top plate (401) and the transparent bottom plate (402), and the partitioned auxiliary heating mechanism (5) is connected to the auxiliary heating controller (7). Ignition module (9), which is arranged between the transparent top plate (401) and the transparent bottom plate (402), and is connected to DC power supply (8); An equivalent gravity indicator component (6) is installed on the base (1). The support components include: A bracket (301) is fixed to the fixing plate (201); Two sets of baffles (302) are vertically fixed on the fixed plate (201). A gasket (303) is fixed on the baffle (302). The transparent base plate (402) is supported by the gasket (303) and the bracket (301). The baffle (302) is provided with a distance scale (305); The spacing adjustment component includes: Screw (306), the screw (306) is provided in two sets, the two sets of screw (306) are symmetrically and vertically fixed on the fixing plate (201); Mounting plate (307), one side of which is provided with a slot (308), the screw (306) passes through the mounting plate (307), and two sets of locking nuts (309) are threaded on the screw (306). The mounting plate (307) is positioned between the two sets of locking nuts (309), and the transparent top plate (401) is inserted into the slot (308). A fixing bolt (310) is threaded onto the mounting plate (307) and abuts against the transparent top plate (401); The ignition module (9) includes: The terminal block (901) is provided in two sets. The transparent top plate (401) and the transparent bottom plate (402) are respectively provided with mounting holes at their center positions. The terminal block (901) is inserted into the mounting holes respectively. The terminal block (901) is provided with a through groove at its center position. Heating rod (902), the two ends of which are respectively inserted into the through slots of the two sets of terminals (901); A fixing screw (903) is threaded onto the side wall of the terminal block (901), and the fixing screw is in a limiting fit with the heating rod (902); The two sets of terminals (901) are respectively connected to the positive and negative terminals of the DC power supply (8).

2. The device for simulating the ignition characteristics of materials under varying low gravity environments according to claim 1, characterized in that, The partitioned auxiliary heating mechanism (5) includes: The heating wire (501) is provided in four sets on the top surface of the transparent top plate (401) and the bottom surface of the transparent bottom plate (402), and the four sets of heating wires (501) are arranged at equal intervals in the circumference. The heating wire (501) is connected to the auxiliary heating controller (7), and a black high-temperature resistant plate is provided on the bottom surface of the transparent base plate (402). The heating wire (501) is disposed between the transparent base plate (402) and the black high-temperature resistant plate.

3. The device for simulating the ignition characteristics of materials under varying low gravity environments according to claim 1, characterized in that, Also includes: An insulating lower positioning rod (304) is fixed on the fixing plate (201). The insulating lower positioning rod (304) has an L-shaped structure. The top of the insulating lower positioning rod (304) is fixed to the terminal (901) at the center of the bottom surface of the transparent base plate (402). An insulating upper positioning rod (311) is fixed on the mounting plate (307), and one end of the insulating upper positioning rod (311) is fixed to the terminal (901) at the center of the top surface of the transparent top plate (401).

4. The device for simulating the ignition characteristics of materials under varying low gravity environments according to claim 1, characterized in that, The positioning component includes a metal damping hinge (202), and the base (1) and the fixing plate (201) are hinged together by the metal damping hinge (202). A hinge locking nut (203) is installed on the metal damping hinge (202).

5. The device for simulating the ignition characteristics of materials under varying low gravity environments according to claim 1, characterized in that, The equivalent gravity indicator component (6) includes: An equivalent gravity scale (601) is fixed on the base (1); A scale pointer (602) is fixed on the fixed plate (201) and is arranged correspondingly to the equivalent gravity scale (601).

6. A method for simulating the ignition characteristics of materials under varying low gravity environments, based on the apparatus for simulating the ignition characteristics of materials under varying low gravity environments as described in any one of claims 1-5, characterized in that, Includes the following steps: Step 1: Initial setup and preparation of the device. Place the base (1) on the horizontal experimental platform and ensure its stability. Check the equivalent gravity adjustment mechanism (2). Make the fixed plate (201) accurately hinged to the top surface of the base (1) through the positioning component. Install the support component, transparent base plate (402), spacing adjustment component, and transparent top plate (401) in sequence. Adjust the spacing between the two and place the experimental materials. Then, use porous material (403) to seal the edges. Arrange the partitioned auxiliary heating mechanism (5) on the top plate and the base plate and connect the circuit. Install the equivalent gravity indicator component (6) and debug to ensure that it displays the value normally. Step 2, equivalent gravity adjustment: Based on the low gravity environment required for the experiment, operate the positioning component to slowly rotate the fixed plate (201), while closely monitoring the value change of the equivalent gravity indicator component (6), and steadily and slowly adjust the tilt angle until the value reaches the set value. Then, use the positioning component to lock the fixed plate (201) to ensure the stability of the low gravity environment in subsequent experiments and avoid the impact of shaking factors on the experimental accuracy. Step 3, Adjust the spacing of the reaction chamber (4). According to the characteristics and requirements of the experimental materials, operate the spacing adjustment component to slowly change the spacing between the transparent top plate (401) and the bottom plate, observe the changes and ensure uniformity and stability. Use a measuring tool to adjust the spacing to the precise value. During adjustment, prevent improper spacing from affecting the materials. After adjustment, check the sealing again to ensure that the porous material (403) fits tightly and maintains a stable internal environment of the reaction chamber (4). Step 4: Zone auxiliary heating control. Through the auxiliary heating controller (7), set the heating temperature and time of each zone auxiliary heating mechanism (5) according to the experimental plan to ensure that the parameters are accurate and can be adjusted independently. Start the DC power supply (8) to power the ignition module (9). Use the temperature sensor to monitor in real time during heating to ensure that the temperature is within the set range. Observe the heating status to ensure uniformity and stability. If the temperature is abnormal, adjust it in time with the controller to ensure accurate temperature conditions. Step 5: Material ignition experiment and data recording. Start the monitoring equipment to record the ignition time and flame propagation speed of the material under low gravity and set temperature in real time. Experimenters closely observe and record any abnormal phenomena to ensure experimental safety. After the experiment, save the data and images, and perform preliminary analysis to provide a basis for studying the ignition characteristics of the material. Step 6: Cleaning and resetting the apparatus. After the experiment, turn off the DC power supply (8). After the temperature of the reaction chamber (4) drops to a safe range, remove the material residue and dispose of it properly. Use cleaning tools and reagents to thoroughly clean the transparent top plate (401) and bottom plate to remove stains and residues. Finally, restore the apparatus to its initial state to prepare for the next experiment.

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