Constant-pressure combustion testing device for energetic material

Abstract

The invention relates to the technical field of energetic material testing, in particular to a constant-pressure combustion testing device for energetic materials. A combustion chamber of the energetic material constant-pressure combustion testing device is connected with a horizontal test bench, and observation windows which are symmetrically arranged are arranged on the periphery of the combustion chamber; the combustion chamber is used for placing a test powder strip, and an ignition unit for igniting the test powder strip is arranged in the combustion chamber; the image detection assembly is connected with the horizontal test bench and is used for acquiring an image outside the combustion chamber and acquiring an image inside the combustion chamber through the observation window; the pressure stabilizing assembly and the exhaust assembly communicate with the combustion chamber, the pressure stabilizing assembly is used for guiding high-pressure inert gas into the combustion chamber, and the exhaust assembly is used for guiding out gas in the combustion chamber. According to the energetic material constant-pressure combustion testing device, dynamic constant-pressure adjustment of the combustion chamber can be achieved, pressure fluctuation and smoke shielding in the combustion process can be reduced, and the accuracy and safety of experimental results and operation convenience are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of energetic material testing, and more particularly, to a constant-pressure combustion testing device for energetic materials. Background Art

[0002] The combustion of energetic materials is usually accompanied by extreme environments such as high temperature and high pressure. Ordinary instruments and equipment are difficult to clarify their combustion processes under actual working conditions, which hinders the research and development as well as the engineering application of energetic materials. Currently, the commonly used characterization method is to use a closed combustion tank with a glass viewing window for combustion testing. However, this method also has a series of problems, such as large pressure fluctuations during the experiment (the high-temperature gas causes the pressure in the closed combustion tank to rise), the soot in the gas seriously obscuring the glass viewing window, high experimental risks, and cumbersome experimental operation processes. Summary of the Invention

[0003] An object of the present invention is to provide a constant-pressure combustion testing device for energetic materials, which can achieve dynamic constant-pressure regulation of the combustion chamber and automatic control of the entire combustion testing process, helping to reduce pressure fluctuations and soot obscuration during combustion, and improving the accuracy, safety, and operation convenience of experimental results.

[0004] Embodiments of the present invention may be implemented as follows:

[0005] The present invention provides a constant-pressure combustion testing device for energetic materials, which includes a test bench, a combustion chamber, an image detection component, a pressure stabilization component, an exhaust component, and a control unit;

[0006] The combustion chamber is connected to the test bench, and two symmetric observation windows are arranged on the outer periphery of the combustion chamber; the combustion chamber is used for placing test strips, and an ignition unit for igniting the test strips is arranged inside the combustion chamber;

[0007] The image detection component is connected to the test bench and is used for collecting images outside the combustion chamber and images inside the combustion chamber through the observation windows;

[0008] Both the pressure stabilization component and the exhaust component are communicated with the combustion chamber. The pressure stabilization component is used for introducing high-pressure inert gas into the combustion chamber, and the exhaust component is used for discharging the gas inside the combustion chamber;

[0009] Among them, the image detection component, the pressure stabilization component, the exhaust component, and the ignition unit are all electrically connected to the control unit.

[0010] In an alternative embodiment, the constant-pressure combustion testing device for energetic materials further includes a first pressure sensor, a mechanical pressure gauge, and a temperature sensor connected to the combustion chamber;

[0011] The first pressure sensor and the mechanical pressure gauge are both used to collect the pressure inside the combustion chamber, and the temperature sensor is used to detect the combustion flame temperature of the test propellant bar.

[0012] Among them, the first pressure sensor and the temperature sensor are both electrically connected to the control unit.

[0013] In an optional embodiment, the constant-pressure combustion test device for energetic materials further includes a first safety valve and a manual exhaust pipeline connected to the combustion chamber; a first manual valve is provided on the manual exhaust pipeline.

[0014] In an optional embodiment, the image detection component includes a main camera, a high-speed camera, and an infrared camera;

[0015] The main camera is used to collect images outside the combustion chamber; the high-speed camera is used to collect image data inside the combustion chamber, and the infrared camera is used to collect infrared image data inside the combustion chamber.

[0016] In an optional embodiment, two observation windows are symmetrically distributed on opposite sides of the combustion chamber; the high-speed camera and the infrared camera are connected to the test bench through a lifting frame and are distributed on both sides of the combustion chamber, and are respectively directly opposite the observation window on the same side.

[0017] In an optional embodiment, the voltage stabilizing component includes a voltage stabilizing pipeline and a high-pressure gas cylinder; the high-pressure gas cylinder is communicated with the combustion chamber through the voltage stabilizing pipeline;

[0018] The voltage stabilizing pipeline is provided with a pressure reducing valve, a second pressure sensor, a first solenoid valve, and a second manual valve;

[0019] Among them, the second pressure sensor and the first solenoid valve are both electrically connected to the control unit.

[0020] In an optional embodiment, the exhaust component includes an exhaust pipeline communicated with the combustion chamber, and a third manual valve and a second solenoid valve provided on the exhaust pipeline;

[0021] Among them, the second solenoid valve is electrically connected to the control unit.

[0022] In an optional embodiment, the constant-pressure combustion test device for energetic materials further includes a cleaning component, and the cleaning component is electrically connected to the control unit;

[0023] The cleaning component is communicated with the combustion chamber, and the cleaning component is used to introduce high-pressure gas into the combustion chamber and discharge the waste gas and dust in the combustion chamber through the exhaust component.

[0024] In an optional embodiment, the cleaning component includes a compressor and a gas guide pipeline;

[0025] The compressor is connected to the combustion chamber through a gas guide pipeline, and a third pressure sensor, a second safety valve, a third solenoid valve, and a fourth manual valve are arranged on the gas guide pipeline;

[0026] Among them, both the third pressure sensor and the third solenoid valve are electrically connected to the control unit.

[0027] In an alternative embodiment, the constant-pressure combustion test device for energetic materials further includes a power supply and a display that are electrically connected to the control unit.

[0028] The beneficial effects of the constant-pressure combustion test device for energetic materials provided by the embodiments of the present invention include:

[0029] The constant-pressure combustion test device for energetic materials includes a test bench, a combustion chamber, an image detection component, a pressure stabilization component, an exhaust component, and a control unit; the combustion chamber is connected to the test bench, and two symmetric observation windows are arranged on the outer periphery of the combustion chamber; the combustion chamber is used to place the test strip, and an ignition unit for igniting the test strip is arranged inside the combustion chamber; the image detection component is connected to the test bench and is used to collect images outside the combustion chamber and images inside the combustion chamber through the observation window; the pressure stabilization component and the exhaust component are both connected to the combustion chamber, and the pressure stabilization component is used to introduce high-pressure inert gas into the combustion chamber, while the exhaust component is used to discharge the gas inside the combustion chamber; among them, the image detection component, the pressure stabilization component, the exhaust component, and the ignition unit are all electrically connected to the control unit. The constant-pressure combustion test device for energetic materials can achieve dynamic constant-pressure regulation of the combustion chamber and automation of the entire combustion test process, which helps to reduce the pressure fluctuation and soot occlusion during combustion, and improve the accuracy, safety, and operation convenience of the experimental results. Description of the Drawings

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0031] Figure 1 It is a schematic structural diagram of the constant-pressure combustion test device for energetic materials provided in this embodiment;

[0032] Figure 2 It is a schematic structural diagram of the constant-pressure combustion test device for energetic materials provided in this embodiment configured with a cleaning component;

[0033] Figure 3 It is a schematic structural diagram of the constant-pressure combustion test device for energetic materials provided in this embodiment configured with a cleaning component, a power supply, and a display.

[0034] Icons: 100 - Constant pressure combustion test device for energetic materials; 110 - Test bench; 120 - Combustion chamber; 130 - Image detection component; 140 - Voltage stabilization component; 150 - Exhaust component; 160 - Control unit; 121 - Observation window; 10 - Test strip; 170 - Ignition unit; 171 - Electrode post; 181 - First pressure sensor; 182 - Mechanical pressure gauge; 183 - First safety valve; 184 - Manual exhaust pipeline; 185 - First manual valve; 131 - Main camera; 132 - High - speed camera; 133 - Infrared camera; 111 - Lift; 141 - Voltage stabilization pipeline; 142 - High - pressure gas cylinder; 143 - Pressure reducing valve; 144 - Second pressure sensor; 145 - First solenoid valve; 146 - Second manual valve; 151 - Exhaust pipeline; 152 - Third manual valve; 153 - Second solenoid valve; 190 - Cleaning component; 191 - Compressor; 192 - Air duct pipeline; 193 - Third pressure sensor; 194 - Second safety valve; 195 - Third solenoid valve; 196 - Fourth manual valve; 101 - Power supply; 102 - Display. Detailed implementation manners

[0035] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. The components of the embodiments of the present invention usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0037] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0038] In the description of the present invention, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0039] In addition, terms such as "first" and "second" are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0040] It should be noted that, without conflict, the features in the embodiments of the present invention can be combined with each other.

[0041] Please refer to Figure 1 , this embodiment provides an energetic material constant-pressure combustion test device 100, and the energetic material constant-pressure combustion test device 100 includes a test bench 110, a combustion chamber 120, an image detection assembly 130, a pressure stabilization assembly 140, an exhaust assembly 150, and a control unit 160;

[0042] The combustion chamber 120 is connected to the test bench 110, and two symmetric observation windows 121 are arranged on the outer periphery of the combustion chamber 120; the combustion chamber 120 is used for placing a test strip 10, and an ignition unit 170 for igniting the test strip 10 is arranged inside the combustion chamber 120;

[0043] The image detection assembly 130 is connected to the test bench 110 and is used for collecting images outside the combustion chamber 120 and collecting images inside the combustion chamber 120 through the observation window 121;

[0044] The pressure stabilization assembly 140 and the exhaust assembly 150 are both communicated with the combustion chamber 120, and the pressure stabilization assembly 140 is used for introducing high-pressure inert gas into the combustion chamber 120, while the exhaust assembly 150 is used for discharging the gas inside the combustion chamber 120;

[0045] Among them, the image detection assembly 130, the pressure stabilization assembly 140, the exhaust assembly 150, and the ignition unit 170 are all electrically connected to the control unit 160.

[0046] Please refer to Figure 1 , the working principle of the energetic material constant-pressure combustion test device 100 is as follows:

[0047] The energetic material constant-pressure combustion test device 100 includes a test bench 110, a combustion chamber 120, an image detection assembly 130, a pressure stabilization assembly 140, an exhaust assembly 150, and a control unit 160;

[0048] Among them, the combustion chamber 120 is connected to the test bench 110, and two symmetric observation windows 121 are arranged on the outer periphery of the combustion chamber 120; the combustion chamber 120 is used for placing a test strip 10, and an ignition unit 170 for igniting the test strip 10 is arranged inside the combustion chamber 120; and the ignition unit 170 is electrically connected to the control unit 160. Therefore, the ignition unit 170 can be controlled through the control unit 160, so that the ignition of the test strip 10 can be controlled;

[0049] The image detection component 130 is connected to the test bench 110 and is used to collect images outside the combustion chamber 120 and images inside the combustion chamber 120 through the observation window 121. In this way, images inside and outside the combustion chamber 120 can be collected in real time, facilitating their transmission for remote observation and detection by staff during the test process, thus improving the safety of the test.

[0050] The pressure stabilizing component 140 and the exhaust component 150 are both connected to the combustion chamber 120. The pressure stabilizing component 140 is used to introduce high-pressure inert gas into the combustion chamber 120, and the exhaust component 150 is used to discharge the gas inside the combustion chamber 120. Both the pressure stabilizing component 140 and the exhaust component 150 are electrically connected to the control unit 160. Therefore, the control unit 160 can control the pressure stabilizing component 140 and the exhaust component 150 according to the working pressure inside the combustion chamber 120, adjust the internal pressure of the combustion chamber 120, and prevent the stability of the internal pressure of the device from being poor due to a large gap between the pressure in the combustion chamber 120 and the target pressure. Thus, it plays a role of charging and discharging gas inside the combustion chamber 120 to adjust its internal pressure, enabling dynamic constant pressure regulation of the combustion chamber 120 and automation of the entire combustion test process, which helps reduce pressure fluctuations and soot occlusion during combustion and improve the accuracy, safety, and operational convenience of the experimental results.

[0051] Furthermore, please refer to Figure 1 , in this embodiment, the constant pressure combustion test device 100 for energetic materials further includes a first pressure sensor 181, a mechanical pressure gauge 182, and a temperature sensor connected to the combustion chamber 120. Both the first pressure sensor 181 and the mechanical pressure gauge 182 are used to collect the pressure inside the combustion chamber 120, and the temperature sensor is used to detect the combustion flame temperature of the test strip inside the combustion chamber 120. Among them, both the first pressure sensor 181 and the temperature sensor are electrically connected to the control unit 160. The image detection component 130 can also be used to collect the display data of the mechanical pressure gauge 182 located outside the combustion chamber 120.

[0052] Through this setting method, the pressure inside the combustion chamber 120 can be collected by the first pressure sensor 181 and transmitted to the control unit 160 for detecting and controlling its internal pressure. Moreover, on this basis, the image detection component 130 can also collect the display data of the mechanical pressure gauge 182 located outside the combustion chamber 120. Thus, in this way, the pressure data detected by the mechanical pressure gauge 182 can be obtained by collecting the image of the mechanical pressure gauge 182 through the image detection component 130, forming multiple pressure data collection paths, which is conducive to ensuring the safety of the test process.

[0053] Moreover, to improve the safety during the test, the constant-pressure combustion test device 100 for energetic materials further includes a first safety valve 183 and a manual exhaust pipeline 184 connected to the combustion chamber 120; a first manual valve 185 is provided on the manual exhaust pipeline 184. When the internal pressure in the combustion chamber 120 reaches the set safety threshold, the first safety valve 183 can automatically relieve the pressure; in addition, manual control can also be performed through the manual exhaust pipeline 184 to facilitate manual pressure relief and manual exhaust of the combustion chamber 120.

[0054] When configuring the image acquisition component, the image detection component 130 includes a main camera 131, a high-speed camera 132, and an infrared camera 133;

[0055] The main camera 131 is used to collect images outside the combustion chamber 120 and the display data of the mechanical pressure gauge 182; the high-speed camera 132 is used to collect image data inside the combustion chamber 120, and the infrared camera 133 is used to collect infrared image data inside the combustion chamber 120.

[0056] Thus, in this way, the main camera 131 can collect images outside the combustion chamber 120 and the display data of the mechanical pressure gauge 182, and then the environmental state of the combustion chamber 120 can be monitored in real time, and the pressure data inside the combustion chamber 120 can be obtained according to the collected display image of the mechanical pressure gauge 182; while the high-speed camera 132 can collect image data inside the combustion chamber 120, and the infrared camera 133 is used to collect infrared image data inside the combustion chamber 120. In this way, both the image data inside the combustion chamber 120 and the infrared image data inside the combustion chamber 120 can be obtained, which is beneficial to comprehensively grasp the images inside and outside the combustion chamber 120 during the test and the temperature distribution inside the combustion chamber 120.

[0057] To facilitate the high-speed camera 132 and the infrared camera 133 to collect images inside the combustion chamber 120, the combustion chamber 120 is configured with two observation windows 121, and the two observation windows 121 are distributed on opposite sides of the combustion chamber 120; the high-speed camera 132 and the infrared camera 133 are connected to the test bench 110 through a lifting frame 111 and are distributed on both sides of the combustion chamber 120, and are respectively directly opposite to the observation window 121 on the same side.

[0058] Moreover, during the operation of the high-speed camera 132 and the infrared camera 133, the connection method through the lifting frame 111 and the test bench 110 is adopted. The purpose is to play the role of height adjustment and buffering through the lifting frame 111 in this way, so as to improve the stability during the image acquisition process.

[0059] When configuring the pressure stabilizing component 140, its function is to supplement inert gas into the combustion chamber 120, thereby adjusting the pressure in the combustion chamber 120. Based on this, the pressure stabilizing component 140 includes a pressure stabilizing pipeline 141 and a high-pressure gas cylinder 142; the high-pressure gas cylinder 142 is connected to the combustion chamber 120 through the pressure stabilizing pipeline 141; the pressure stabilizing pipeline 141 is provided with a pressure reducing valve 143, a second pressure sensor 144, a first solenoid valve 145, and a second manual valve 146; among them, both the second pressure sensor 144 and the first solenoid valve 145 are electrically connected to the control unit 160. The gas type in the high-pressure gas cylinder 142 is argon or nitrogen.

[0060] Thus, through the above structural settings, during use, the inert gas in the high-pressure gas cylinder 142 can be introduced into the combustion chamber 120 through the pressure stabilizing pipeline 141, and the amount of the introduced inert gas is adjusted by the control unit 160 based on the pressure state in the combustion chamber 120; based on this, the pressure stabilizing pipeline 141 is provided with a pressure reducing valve 143, a second pressure sensor 144, a first solenoid valve 145, and a second manual valve 146; among them, both the second pressure sensor 144 and the first solenoid valve 145 are electrically connected to the control unit 160, so that the control unit 160 can receive the pressure data of the inert gas in the pressure stabilizing pipeline 141 detected by the second pressure sensor 144, and control the opening and closing of the first solenoid valve 145, thereby controlling the conduction of the pressure stabilizing pipeline 141, and further controlling the amount of the inert gas introduced into the combustion chamber 120; and a pressure reducing valve 143 for reducing the pressure of the inert gas output by the high-pressure gas cylinder 142 is configured on the pressure stabilizing pipeline 141, and at the same time, a second manual valve 146 for the staff to manually control the opening and closing of the pressure stabilizing pipeline 141 is configured.

[0061] Further, please refer to Figure 1 , in this embodiment, the exhaust component 150 includes an exhaust pipeline 151 communicating with the combustion chamber 120, and a third manual valve 152 and a second solenoid valve 153 arranged on the exhaust pipeline 151; among them, the second solenoid valve 153 is electrically connected to the control unit 160. Thus, the opening and closing control of the exhaust pipeline 151 can be realized by the control of the second solenoid valve 153 by the control unit 160, and when the control unit 160 controls the second solenoid valve 153, it is based on the test state in the combustion chamber 120, that is, parameters such as the combustion state and pressure state of the internal test strip 10, combined with the working state of the pressure stabilizing component 140, so as to realize the adjustment of the connection state between the exhaust pipeline 151 and the inside of the combustion chamber 120, and further, during the process of dynamically adjusting the pressure inside the combustion chamber 120, it can play a role in discharging the gas in the combustion chamber 120, that is, the process of deflation, and further, under the action of the control unit 160, it can form a charging and discharging process together with the pressure stabilizing component 140, so as to realize the dynamic adjustment of the pressure in the combustion chamber 120.

[0062] Further, please refer to Figure 1 and Figure 2 , in this embodiment, to facilitate exhausting the exhaust gas and dust in the combustion chamber 120 after the test, therefore, the constant-pressure combustion test device 100 for energetic materials further includes a cleaning assembly 190, and the cleaning assembly 190 is electrically connected to the control unit 160; the cleaning assembly 190 is communicated with the combustion chamber 120, and the cleaning assembly 190 is used for introducing high-pressure gas into the combustion chamber 120 and exhausting the exhaust gas and dust in the combustion chamber 120 through the exhaust assembly 150. In such a setting manner, it adopts the method of introducing high-pressure gas into the combustion chamber 120, mixing the introduced high-pressure gas with the gas and dust in the combustion chamber 120, and increasing the pressure in the combustion chamber 120, so as to exhaust the exhaust gas and dust in the combustion chamber 120 through the exhaust assembly 150. Thus, the cleaning effect on the combustion chamber 120 is achieved.

[0063] Specifically, the cleaning assembly 190 includes a compressor 191 and a gas pipeline 192; the compressor 191 is communicated with the combustion chamber 120 through the gas pipeline 192, and a third pressure sensor 193, a second safety valve 194, a third solenoid valve 195 and a fourth manual valve 196 are arranged on the gas pipeline 192; wherein, both the third pressure sensor 193 and the third solenoid valve 195 are electrically connected to the control unit 160.

[0064] Through the above structural setting manner, it can detect the pressure of the gas pipeline 192 through the third pressure sensor 193, and can realize the opening and closing control of the gas pipeline 192 by electrically connecting the third solenoid valve 195 with the control unit 160. By configuring the fourth manual valve 196, it is convenient for the staff to achieve manual control; in addition, a second safety valve 194 is arranged on the gas pipeline 192, and its purpose is to prevent the pressure in the gas pipeline 192 from being greater than the output pressure of the compressor 191, so as to avoid the air flow flowing back into the compressor 191 and causing damage to the compressor 191; it is also used to prevent the high-pressure gas in the combustion chamber 120 from flowing back and causing the compressor 191 to explode.

[0065] On the basis of the above structure, please refer to Figures 1-3 , the constant-pressure combustion test device 100 for energetic materials further includes a power supply 101 and a display 102 that are electrically connected to the control unit 160. It can be connected to the display 102 through the control unit 160 to display the detected data and the collected images, so as to facilitate the staff to observe the state of the test process in real time and view the relevant data.

[0066] Based on the above content, please refer to Figures 1-3, in this embodiment, when configuring the combustion chamber 120, two observation windows 121 are symmetrically arranged on the outer periphery of the combustion chamber 120, and sapphire glass is installed on the observation windows 121 so that the high-speed camera 132 and the infrared camera 133 can collect the image data inside the combustion chamber 120 through their corresponding observation windows 121;

[0067] When configuring the ignition unit 170, it is electrically connected to the external power supply 101 through the control unit 160 to facilitate the ignition control of the internal test propellant 10. The ignition unit 170 includes an electrode column 171 placed inside the combustion chamber 120 and a nickel-chromium wire connected to the electrode column 171.

[0068] Please refer to Figures 1-3 , the working process of the constant-pressure combustion test device 100 for energetic materials is as follows:

[0069] During the combustion test, the test propellant 10 is installed in the combustion chamber 120. The first manual valve 185 installed on the device remains in the closed state, and the second manual valve 146, the third manual valve 152, and the fourth manual valve 196 remain in the open state. It should be noted that according to different test states, the opening and closing state of the manual exhaust pipeline 184 during the test can be adjusted appropriately, that is, the first manual valve 185 can also be in the open state; while the first solenoid valve 145, the second solenoid valve 153, and the third solenoid valve 195 remain in the normally closed state;

[0070] The control unit 160 first controls the first solenoid valve 145 to open, and the inert gas in the high-pressure gas cylinder 142 is continuously input into the combustion chamber 120; after the first pressure sensor 181 detects that the pressure inside the combustion chamber 120 reaches the target value, the control unit 160 will control the second solenoid valve 153 installed on the exhaust pipeline 151 to open, and adjust the gas release frequency of the second solenoid valve 153 through the PID algorithm, or adjust the gas filling state of the first solenoid valve 145, so as to realize the rapid charging and discharging of the combustion chamber 120 and maintain the constant-pressure state during the test;

[0071] After the pressure in the combustion chamber 120 stabilizes, the control unit 160 controls the ignition unit 170, and the electrode post 171 is electrically connected to the power supply 101, thereby causing the nichrome wire to heat up and ignite the test strip 10. Meanwhile, the recording functions of the high-speed camera 132 and the infrared camera 133 are synchronously turned on. At this time, the control unit 160 receives the pressure data in the combustion chamber 120, which can be the detection signal of the first pressure sensor 181 or the relevant data obtained by analyzing the image of the mechanical pressure gauge 182 collected. At the same time, based on the images collected by the temperature sensor and the infrared camera 133, the temperature in the combustion chamber 120 and the combustion data of the test strip 10 are analyzed. Moreover, the relevant data can be collected and received into the control unit 160 for analysis and storage, or transmitted to the data background processing center for analysis and storage. The collected data and the analyzed data can be displayed to the staff through the display 102, so as to facilitate the staff to obtain the relevant situation in real time and also facilitate the staff to manually control the device according to the relevant situation, such as manually adjusting the first manual valve 185, the second manual valve 146, the third manual valve 152, and the fourth manual valve 196 therein.

[0072] After the test strip 10 is ignited, a large amount of gas will be generated by combustion. In order to keep the combustion process in a constant pressure state, the opening frequency of the second solenoid valve 153 will be further increased. The combustion process of the test strip 10 will be recorded by the high-speed camera 132 and the infrared camera 133 through the observation window 121.

[0073] When the test strip 10 burns out, the recording functions of the high-speed camera 132 and the infrared camera 133 will be synchronously turned off or turned off with a delay. And the control unit 160 controls the second solenoid valve 153 to open and the first solenoid valve 145 to close. At this time, the high-pressure gas in the combustion chamber 120 is quickly discharged.

[0074] When the first pressure sensor 181 detects that the pressure in the combustion chamber 120 drops to the atmospheric pressure, the control unit 160 controls the third solenoid valve 195 to open, and the high-pressure gas generated by the compressor 191 is filled into the combustion chamber 120 through the air duct 192. Then, by controlling the second solenoid valve 153, the gas is mixed with the gas and dust in the combustion chamber 120 and discharged from the exhaust pipe 151, thereby removing the residual waste gas and dust in the device after the combustion test.

[0075] After a period of time, the control unit 160 controls the third solenoid valve 195 and the second solenoid valve 153 to close, and the combustion test process ends.

[0076] In summary, based on the above content, it can be seen that through the above structural settings, the constant-pressure combustion test device 100 of the energetic material can realize the ignition control of the test propellant 10 through the electrical connection between the control unit 160 and the ignition unit 170, and can synchronously obtain the ignition delay time, pressure change, temperature distribution, and combustion flame structure during the combustion process, realize the dynamic constant-pressure regulation based on the PID algorithm, and automate the control of the entire combustion test process, which helps to reduce the pressure fluctuation and soot occlusion during the combustion process, and improve the accuracy, safety, and operation convenience of the experimental results.

[0077] To ensure personal safety, the experimental test process adopts a man-machine isolation setting method. Moreover, to prevent the compressor 191 or the combustion chamber 120 from exploding, a first safety valve 183 is installed on the combustion chamber 120, and a second safety valve 194 is installed near the outlet of the compressor 191. In addition, when the third pressure sensor 193 detects that the pressure near the outlet of the compressor 191 rises abnormally to the maximum charging pressure that the compressor 191 can reach, or the first pressure sensor 181 detects that the pressure in the combustion chamber 120 is too high, the control unit 160 will control the second solenoid valve 153 to open and the first solenoid valve 145 to close to quickly relieve the pressure of the combustion chamber 120.

[0078] Moreover, to prevent the first pressure sensor 181, the second pressure sensor 144, and the third pressure sensor 193 from malfunctioning, a mechanical pressure gauge 182 installed on the combustion device can also be used, and the operation state of the combustion device can be monitored in real time in cooperation with the main camera.

[0079] The sapphire glass transparent window at the observation window 121 utilizes the excellent mechanical properties of sapphire glass to improve the safety and reliability of the test device. In addition, sapphire glass also has the characteristics of mid-infrared and near-infrared light transmission. When used in cooperation with an infrared camera, it can improve the accuracy of the experimental test results. Moreover, the test bench 110 is set horizontally to suppress the vibration of the constant-pressure combustion test device during operation.

[0080] In summary, the control unit 160 will collect and summarize the pressure data collected by the first pressure sensor 181, the second pressure sensor 144, and the third pressure sensor 193, the temperature data collected by the temperature sensor, and the image data collected by the main camera 131, the high-speed camera 132, and the infrared camera 133, and will display the pressure curve, temperature curve, combustion process, temperature distribution change process, and device operation state in the display 102 in real time.

[0081] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A constant pressure combustion test device for energetic materials, characterized in that: The energetic material constant pressure combustion test device comprises a test bench, a combustion chamber, an image detection component, a voltage stabilization component, an exhaust component and a control unit; The combustion chamber is connected to the test bench, and the outer periphery of the combustion chamber is provided with two symmetrical observation windows; the combustion chamber is used to place the test powder strip, and the combustion chamber is provided with an ignition unit for igniting the test powder strip; The image detection component is connected to the test bench and is used to collect images outside the combustion chamber and to collect images inside the combustion chamber through the observation window; The pressure stabilizing component and the exhaust component are both connected to the combustion chamber, and the pressure stabilizing component is used to introduce high-pressure inert gas into the combustion chamber, while the exhaust component is used to extract the gas in the combustion chamber; Wherein, the image detection component, the voltage stabilization component, the exhaust component and the ignition unit are all electrically connected to the control unit.

2. The energetic material constant pressure combustion test device according to claim 1, characterized in that: The energetic material constant pressure combustion test device further comprises a first pressure sensor, a mechanical pressure gauge and a temperature sensor connected to the combustion chamber; The first pressure sensor and the mechanical pressure gauge are used to collect the pressure in the combustion chamber, and the temperature sensor is used to detect the combustion flame temperature of the test medicine strip; Wherein, the first pressure sensor and the temperature sensor are both electrically connected to the control unit.

3. The energetic material constant pressure combustion test device according to claim 2, characterized in that: The energetic material constant pressure combustion test device also includes a first safety valve and a manual exhaust pipeline connected to the combustion chamber; a first manual valve is provided on the manual exhaust pipeline.

4. The energetic material constant pressure combustion test device according to claim 2, characterized in that: The image detection component includes a main camera, a high-speed camera and an infrared camera; The main camera is used to collect images outside the combustion chamber; the high-speed camera is used to collect image data inside the combustion chamber; and the infrared camera is used to collect infrared image data inside the combustion chamber.

5. The energetic material constant pressure combustion test device according to claim 4, characterized in that: The two observation windows are symmetrically distributed on the side of the combustion chamber; the high-speed camera and the infrared camera are connected to the test bench through a lifting frame, and are distributed on both sides of the combustion chamber, and are respectively opposite to the observation windows on the same side.

6. The energetic material constant pressure combustion test device according to claim 1, characterized in that: The pressure stabilizing assembly includes a pressure stabilizing pipeline and a high-pressure gas cylinder; the high-pressure gas cylinder is connected to the combustion chamber through the pressure stabilizing pipeline; The pressure stabilizing pipeline is provided with a pressure reducing valve, a second pressure sensor, a first solenoid valve and a second manual valve; Wherein, the second pressure sensor and the first solenoid valve are both electrically connected to the control unit.

7. The energetic material constant pressure combustion test device according to claim 1, characterized in that: The exhaust assembly includes an exhaust pipeline connected to the combustion chamber, and a third manual valve and a second solenoid valve arranged in the exhaust pipeline; Wherein, the second solenoid valve is electrically connected to the control unit.

8. The energetic material constant pressure combustion test device according to claim 1, characterized in that: The energetic material constant pressure combustion test device further comprises a cleaning component, and the cleaning component is electrically connected to the control unit; The cleaning assembly is in communication with the combustion chamber, and is used for introducing high-pressure gas into the combustion chamber and discharging exhaust gas and dust in the combustion chamber through the exhaust assembly.

9. The energetic material constant pressure combustion test device according to claim 8, characterized in that: The cleaning assembly includes a compressor and an air guide line; The compressor is connected to the combustion chamber through the air guide pipe, and the air guide pipe is provided with a third pressure sensor, a second safety valve, a third solenoid valve and a fourth manual valve; Wherein, the third pressure sensor and the third solenoid valve are both electrically connected to the control unit.

10. The energetic material constant pressure combustion test device according to any one of claims 1 to 9, characterized in that: The energetic material constant pressure combustion testing device also includes a power supply and a display electrically connected to the control unit.

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