Observation system for explosive hotspot ignition response behaviors and output parameters

Abstract

The invention discloses an explosive hot ignition response behavior and output parameter observation system, which comprises a frame body composed of a plurality of bearing columns, the bottom of the frame body is provided with a movable base, and the upper part of the frame body is provided with a test tank body; a plurality of interfaces are formed in the middle of the side wall of the test tank body; by arranging the heating control module, the heating wire and the heat preservation layer, a test sample can be heated in the test tank body, meanwhile, by means of the cooling module and the cooling water circulating pump, the whole test tank body is prevented from being in a high-temperature state, the working condition of the data acquisition module is effectively controlled, the reliability and repeatability of measured data are improved, and the test efficiency is improved. Effective technical support can be provided for explosive preparation, production process thermal safety design and service treatment thermal protection design, and the technical problems that an existing device cannot effectively obtain explosive hot ignition response rules and cannot guarantee output parameter measurement repeatability of explosive hot ignition response intensity are solved.

Description

Technical Field

[0001] The present invention belongs to the field of explosive safety performance evaluation, and relates to an observation system for the hot ignition response behavior and output parameters of explosives. Background Art

[0002] The main hazard sources faced by explosives during production and service processes mainly include mechanical stimuli (such as impact, friction, and shock wave stimuli, etc.), electrostatic spark stimuli, ultra-high current stimuli generated by lightning, and high-temperature stimuli, etc. Among them, high-temperature stimuli occur throughout the entire life cycle of explosives, and the ignition response caused by the slow heating of explosives due to environmental high temperature is relatively intense, and an overall detonation reaction of the explosives may occur, causing serious damage to production equipment, factories, warehouses, transportation vehicles, and weapon platforms, and at the same time posing a high threat to the safety of personnel's lives, becoming a bottleneck restricting the safety of explosive production, storage, transportation, and service processes.

[0003] Currently, most domestic research institutions and universities adopt the assessment methods specified in GJB772A-1997 for the response characteristics of explosives under heat stimulation conditions. For the evaluation of the intensity of the response of explosives under heat stimulation, this method conducts qualitative evaluation by visually judging the size of the shell fragments, and the quantitative evaluation means are limited to the measurement of shock wave overpressure, temperature, and thermal radiation, etc., arranged at a certain distance from the sample. The measurement repeatability is poor, and it is also impossible to obtain relatively microscopic parameters of the hot ignition growth process of explosives.

[0004] At the same time, existing devices also cannot meet the requirements for observing the hot ignition combustion and explosion behavior of explosives, measuring the transient pressure output parameters of the ignition response, and controlling the test safety conditions, etc. Therefore, it is impossible to effectively obtain the hot ignition response law of explosives, nor can it ensure the repeatability of the measurement data of the output parameters of the intensity of the hot ignition response of explosives. Domestic patents such as CN 201510304527.8, CN 201210051662.2, CN 201710399296.2, etc. do not meet these requirements.

[0005] Therefore, there is an urgent need for an observation system for the hot ignition response behavior and output parameters of explosives, which is mainly used for observing the ignition combustion and explosion reaction behavior of explosives under slow heating stimulation conditions and quantitatively evaluating the output characteristics, and can realize the measurement function of the hot ignition characteristics of explosive samples in the order of 20g. Summary of the Invention

[0006] Aiming at the deficiencies existing in the prior art, the purpose of the present invention is to provide an observation system for the hot ignition response behavior and output parameters of explosives, so as to solve the technical problems that existing devices cannot effectively obtain the hot ignition response law of explosives and cannot ensure the repeatability of the measurement of the output parameters of the intensity of the hot ignition response of explosives.

[0007] To solve the above technical problems, the present invention is implemented by adopting the following technical solutions:

[0008] An observation system for the hot ignition response behavior and output parameters of an explosive, comprising a frame composed of multiple load-bearing columns, a movable base is arranged at the bottom of the frame, and a test tank is arranged at the upper part of the frame; a plurality of interfaces are arranged in the middle of the side wall of the test tank; a first flange and a second flange are respectively arranged at the top and bottom of the test tank; both the first flange and the second flange are fixed on the load-bearing columns;

[0009] A heating wire is arranged in the test tank, and the upper end of the heating wire is fixed on the first flange; a heat preservation layer is arranged on the inner wall of the test tank;

[0010] A cooling module is arranged on the side wall of the test tank, and a cooling water circulation pump is connected to the cooling module;

[0011] A sample base is arranged at the top of the second flange, and a pressure relief valve is arranged at the bottom of the second flange;

[0012] It further includes a heating control module, an atmosphere regulation module, a safety status control module and a data acquisition module;

[0013] The heating control module is used to control the temperature of the test sample during the test;

[0014] The atmosphere regulation module is used to control the initial atmosphere conditions inside the test tank;

[0015] The safety status control module is used to monitor and release the high-pressure gas products inside the test tank after the test;

[0016] The data acquisition module is used to collect and process the pressure signals inside the test tank.

[0017] The present invention further includes the following technical features:

[0018] The interfaces include a pressure measurement interface, a temperature measurement interface, a heat flux measurement interface, an inflation and vacuum pumping interface, a balance valve interface and a spare measurement interface;

[0019] Flange connection holes and prefabricated sealing grooves are respectively arranged at the upper and lower ends of the test tank, and sealing rings are arranged in the prefabricated sealing grooves.

[0020] The heating control module includes a remote heating controller and a temperature sensor. The temperature sensor is arranged on the temperature measurement interface of the test tank, and the temperature sensing head of the temperature sensor is suspended inside the test tank. The temperature sensor is electrically connected to the remote heating controller, and the remote heating controller is electrically connected to the heating wire.

[0021] The atmosphere adjustment module includes an inflation valve provided on the inflation and vacuum pumping interface of the test tank body. A four-way valve is connected to the inflation valve. A compressed gas cylinder is connected to each of the second end and the third end of the four-way valve. A vacuum pump is provided on the fourth end of the four-way valve. A pressure gauge is provided between the four-way valve and the inflation valve.

[0022] The safety state control module includes a balance valve and a pressure relief valve. The balance valve is provided on the balance valve interface of the test tank body. The pressure relief valve is provided on the second flange and is electrically connected to the remote heating control instrument.

[0023] The data acquisition module includes a pressure sensor provided on the pressure measurement interface of the test tank body. A signal converter and a data acquisition instrument are sequentially connected to the pressure sensor.

[0024] A window installation hole is provided on the first flange, and a glass window is provided in the window installation hole;

[0025] A reflector is provided directly above the glass window, and a camera is provided in the output optical path of the reflector.

[0026] A sealing ring assembly groove is preset on the first flange, and a sealing ring is provided in the sealing ring assembly groove.

[0027] Four side ears are equidistantly arranged on the circumference of the first flange. A load-bearing column is provided in the side ear and is fixedly connected to the top of the load-bearing column.

[0028] Six heating power supply interfaces are evenly provided on the first flange outside the window installation hole.

[0029] A fixing groove is preset at the top center of the second flange, and the sample base is provided in the fixing groove; a pressure relief valve interface is provided on the second flange outside the fixing groove, and the pressure relief valve is provided in the pressure relief valve interface;

[0030] Four linear bearings are provided on the circumference of the second flange, and the linear bearings are fixedly sleeved on the corresponding load-bearing columns;

[0031] A sealing groove is preset on the second flange, and a sealing ring is provided in the sealing groove.

[0032] The movable base includes a support flat plate fixed on the load-bearing column. A cylinder is provided at the center of the bottom of the support flat plate, and the piston of the cylinder is fixedly installed at the center of the bottom of the second flange; a storage box fixed on the load-bearing column is provided directly below the support flat plate. An air compressor is connected to the cylinder; casters are provided at the bottom of the storage box.

[0033] Compared with the prior art, the present invention has the following beneficial technical effects:

[0034] (I) The present invention provides a heating control module, a heating wire and an insulation layer, so that the test sample can be heated inside the test tank. At the same time, the cooling module and the cooling water circulation pump can be used to prevent the test tank from being in a high temperature state as a whole, effectively controlling the working conditions of the data acquisition module, improving the reliability and repeatability of the measurement data, and providing effective technical support for explosive preparation, production process thermal safety design and service handling thermal protection design, thereby solving the technical problem that the existing device cannot effectively obtain the law of the thermal ignition response of the explosive and cannot ensure the measurement repeatability of the output parameters of the intensity of the thermal ignition response of the explosive.

[0035] (II) The present invention can achieve large-volume testing with a maximum TNT equivalent of 20g by designing the structural strength of the test tank, the first flange and the second flange, thus meeting the design requirements of engineering applications; through sensors installed on the glass window and multiple test interfaces, it can obtain images, temperature and pressure data of the thermal ignition response behavior of the test sample, providing scientific data for the thermal safety design of explosives.

[0036] (III) By setting up an atmosphere adjustment module, the pressure and atmosphere test conditions of the test sample can be controlled; by setting up a safety state control module, the human-machine isolation operation of the dangerous links in the explosive thermal safety test process can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram of the composition of an observation system for explosive thermal ignition response behavior and output parameters of the present invention;

[0038] Figure 2 This is the side view of the test tank;

[0039] Figure 3 This is a top view of the test tank;

[0040] Figure 4 is a schematic diagram of the first flange structure;

[0041] Figure 5 Schematic diagram of the second flange structure.

[0042] The meanings of the reference numerals in the figure are as follows: 1 - test tank body, 2 - first flange, 3 - second flange, 4 - load-bearing column, 5 - movable base, 6 - remote heating controller, 7 - temperature sensor, 8 - heating wire, 9 - thermal insulation layer, 10 - pressure sensor, 11 - signal converter, 12 - data acquisition instrument, 13 - test sample, 14 - sample base, 15 - high-speed camera, 16 - glass window, 17 - mirror, 18 - balance valve, 19 - vacuum pump, 20 - compressed gas cylinder, 21 - inflation valve, 22 - pressure gauge, 23 - air compressor, 24 - pressure relief valve, 25 - cooling module, 26 - cooling water circulation pump;

[0043] 1 - a - measurement interface, 1 - b - temperature measurement interface, 1 - c - heat flux measurement interface, 1 - d - inflation and vacuum interface, 1 - e - balance valve interface, 1 - f - spare measurement interface;

[0044] 2 - a - sealing ring assembly groove, 2 - b - first screw hole, 2 - c - side ear, 2 - d - window mounting hole, 2 - e - power supply interface;

[0045] 3 - a - pressure relief valve interface, 3 - b - fixing groove, 3 - c - linear bearing, 3 - d - second screw hole, 3 - e - sealing groove;

[0046] 5 - a - support flat plate, 5 - b - cylinder, 5 - c - storage box, 5 - d - caster;

[0047] 6 - a - touch screen, 6 - b - safety lock, 6 - c - panel lock catch, 6 - d - current output port, 6 - e - data feedback port, 6 - f - pressure relief control port;

[0048] 18 - a - exhaust passage.

[0049] The following further elaborates on the specific content of the present invention in conjunction with embodiments. Specific embodiments

[0050] It should be noted that all components in the present invention, without special instructions, are components known in the art.

[0051] The following gives specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent transformations made on the basis of the technical solutions of this application fall within the protection scope of the present invention.

[0052] The present invention provides an observation system for the hot ignition response behavior and output parameters of explosives, including a frame body composed of a plurality of load-bearing columns 4. A movable base 5 is arranged at the bottom of the frame body, and a test tank 1 is arranged at the upper part of the frame body. A plurality of interfaces are arranged in the middle of the side wall of the test tank 1. A first flange 2 and a second flange 3 are respectively arranged at the top and bottom of the test tank 1. Both the first flange 2 and the second flange 3 are fixed on the load-bearing column 4.

[0053] A heating wire 8 is arranged in the test tank 1, and the upper end of the heating wire 8 is fixed on the first flange 2. A heat preservation layer 9 is arranged on the inner wall of the test tank 1.

[0054] A cooling module 25 is arranged on the side wall of the test tank 1, and a cooling water circulation pump 26 is connected to the cooling module 25.

[0055] A sample base 14 is arranged at the top of the second flange 3, and a pressure relief valve 24 is arranged at the bottom of the second flange 3.

[0056] It further includes a heating control module, an atmosphere regulation module, a safety status control module and a data acquisition module.

[0057] The heating control module is used to control the temperature of the test sample 13 during the test.

[0058] The atmosphere regulation module is used to control the initial atmosphere conditions inside the test tank 1.

[0059] The safety status control module is used to monitor and release the high-pressure gas products inside the test tank 1 after the test.

[0060] The data acquisition module is used to collect and process the pressure signals inside the test tank 1.

[0061] In the above technical solution, the first flange 2 is processed and formed from thick plate stainless steel, mainly serving as the upper end cover of the test tank 1. The second flange 3 is processed and formed from thick plate stainless steel, mainly used for the installation of the test sample 13, the sample base 14, the pressure relief valve 24 and the piston of the cylinder 5-b.

[0062] The cooling module 25 is to avoid the output drift of the pressure sensor 10 caused by high temperature, and realizes the purpose of cooling the pressure sensor 10 through cold water circulation, so as to keep the measurement performance of the pressure sensor 10 stable and reliable. The cooling water circulation pump 26 provides the circulating kinetic energy of cooling water for the cooling module 25.

[0063] The heat preservation layer 9 is attached and assembled on the inner wall of the test tank 1, and generally thermal insulation cotton is selected, which is used to block the heat exchange between the inside and outside of the test tank 1, optimize the stability of the temperature inside the test tank 1, and ensure the controllability of the test process and the repeatability of the test results.

[0064] The load-bearing column 4 is composed of 4 cylindrical stainless steel columns with a diameter of 40 mm. It is stably installed directly above the casters 5-d of the movable base 5 through prefabricated interfaces, and is stably connected to the test tank 1, the first flange 2, and the second flange 3. It is used to stably support the test tank 1 and the first flange 2 in the set position, guide the smooth up and down movement of the second flange 3, and ensure the safe operation during the test process.

[0065] The test sample 13 can be explosives in different material or product states such as single-component explosives, semi-finished products and finished charges during the production process of mixed explosives. It can also be charges formed by different processes such as casting, pouring, and pressing. It can also be explosives in different forms such as powder state, fluid state, charge column, and charge block. According to different sample states, corresponding containers or components are required to assemble the test sample 13.

[0066] The sample base 14 is used for the reliable assembly of the test sample 13, ensuring that the test sample 13 is at the center position of the test tank 1, and at the same time has the function of assisting in the assembly and fixing of the temperature sensor 7.

[0067] The pressure relief valve 24 is installed at the pressure relief valve interface 3-a reserved on the second flange 3 and is connected to the remote heating controller 6 through a communication line. After the ignition reaction of the test sample 13 occurs, the pressure relief valve 24 is remotely opened through the parameter setting touch screen 6-a to fully discharge the combustion and explosion product gas in the test tank 1. When the pressure display is lower than 0.2 MPa, the pressure relief valve 24 is closed, and the operator can approach the test tank 1.

[0068] In the present invention, by setting the heating control module, the heating wire 8, and the heat preservation layer 9, it is possible to heat the test sample 13 inside the test tank. At the same time, through the cooling module 25 and the cooling water circulation pump 26, it is possible to prevent the entire test tank 1 from being in a high-temperature state, effectively controlling the working conditions of the data acquisition module, improving the reliability and repeatability of the measured data, and being able to provide effective technical support for the preparation of explosives, the thermal safety design of the production process, and the thermal protection design of service handling. It solves the technical problems that the existing devices cannot effectively obtain the hot ignition response law of explosives and cannot ensure the repeatability of the measurement of the output parameters of the severity of the hot ignition response of explosives.

[0069] The interfaces include a pressure measurement interface 1-a, a temperature measurement interface 1-b, a heat flux measurement interface 1-c, an inflation and vacuum pumping interface 1-d, a balance valve interface 1-e, and a spare measurement interface 1-f;

[0070] Flange connection holes 1-g and prefabricated sealing grooves 1-h are respectively arranged at the upper and lower ends of the test tank 1, and sealing rings are arranged in the prefabricated sealing grooves 1-h.

[0071] In the above technical solution, the test tank 1 is mainly used for controlling the temperature, pressure and atmosphere environment of the test sample 13 during the test process, and for bearing pressure and data testing of ignition, combustion and explosion. It is processed from thick-walled seamless stainless steel pipes to fully ensure its airtightness and pressure resistance. Multiple measurement interfaces and valve interfaces are provided in the middle of the side wall of the test tank 1.

[0072] The heating control module includes a remote heating controller 6 and a temperature sensor 7. The temperature sensor 7 is arranged on the temperature measurement interface 1-b of the test tank 1, and the temperature sensing head of the temperature sensor 7 is suspended inside the test tank 1. The temperature sensor 7 is electrically connected to the remote heating controller 6, and the remote heating controller 6 is electrically connected to the heating wire 8.

[0073] The remote heating controller 6 is used to remotely and dynamically control the internal temperature of the test tank 1. According to the real-time temperature monitoring data of the temperature sensor 7, it performs corresponding heating actions through the internally integrated PID temperature control module and power adjustment module to realize the remote control of the temperature state of the test sample 13. In addition, the remote heating controller 6 integrates a remote control module for the pressure relief valve 24, and can safely release the internal pressure of the test tank 1 in a state of human-machine isolation. The panel of the remote heating controller 6 includes a parameter setting touch screen 6-a, a power supply safety lock 6-b, a panel lock 6-c, a heating current output port 6-d, a temperature data feedback receiving port 6-e and a safety pressure relief control port 6-f. The temperature sensor 7 is used to measure the internal temperature data of the test tank 1 and feedback the temperature data to the remote heating controller 6 to facilitate the remote heating controller 6 to adjust the heating parameters. The heating wire 8 forms a current loop through the heating power supply interface 2-e and is a heat loading element for controlling the temperature of the test sample 13. The heating wire is selected to heat the test sample 13 at a controllable rate, and the heating form is mainly thermal radiation, with a maximum power of up to 3 kW.

[0074] The atmosphere adjustment module includes an inflation valve 21 arranged on the inflation and vacuum pumping interface 1-d of the test tank 1. A four-way valve is connected to the inflation valve 21. A compressed gas cylinder 20 is connected to the second end and the third end of the four-way valve respectively, and a vacuum pump 19 is arranged on the fourth end of the four-way valve. A pressure gauge 22 is arranged between the four-way valve and the inflation valve 21.

[0075] In the above technical solution, the vacuum pump 19 is connected to the inflation valve 21 during use and is used to discharge the air in the test tank according to the requirements of different test conditions, so as to more precisely control the atmosphere conditions inside the test tank 1. The compressed gas cylinder 20 is connected to the inflation valve 21 during use, and different types of compressed gases can be selected according to the test condition design, mainly including hydrogen, nitrogen, oxygen, etc., so as to more precisely control the atmosphere conditions inside the test tank 1. The inflation valve 21 is used to adjust the atmosphere conditions inside the test tank 1. When used in conjunction with the vacuum pump 19, it can perform a vacuum pumping operation on the test tank 1, and when used in conjunction with the compressed gas cylinder 20, it can perform a filling operation of different gases on the test tank 1. The pressure gauge 22 is connected to the inflation valve 21 and is used to indicate the control of the process parameters during the adjustment of the atmosphere inside the test tank 1.

[0076] The safety state control module includes a balance valve 18 and a pressure relief valve 24. The balance valve 18 is arranged on the balance valve interface 1-e of the test tank 1, and the pressure relief valve 24 is arranged on the second flange 3. The pressure relief valve 24 is electrically connected to the remote heating controller 6.

[0077] In the above technical solution, the balance valve 18 is a safety prevention component in the test operation process of the present invention and is used for remotely discharging the high-pressure gas products inside the test tank 1 after the test sample 13 undergoes combustion and explosion. The pressure relief valve 24 completes remote pressure relief. The operator enters the test site and approaches the test tank 1, manually opens the switch of the balance valve 18 to fully balance the pressure inside and outside the test tank 1, avoiding accidental injury to the operator during the disassembly process. The exhaust passage 18-a used in conjunction is designed to be a bent shape with an upward opening to prevent the gas from jetting the operator during the pressure relief process.

[0078] The pressure relief valve 24 is installed at the pressure relief valve interface 3-a reserved on the second flange 3 and is connected to the remote heating controller 6 through a communication line. After the test sample 13 undergoes an ignition reaction, the pressure relief valve 24 is remotely opened through the parameter setting touch screen 6-a to fully discharge the combustion and explosion product gas inside the test tank 1. When the pressure display is lower than 0.2 MPa, the pressure relief valve 24 is closed, and the operator can approach the test tank.

[0079] The data acquisition module includes a pressure sensor 10 arranged on the pressure measurement interface 1-a of the test tank 1. A signal converter 11 and a data acquisition instrument 12 are sequentially connected to the pressure sensor 10.

[0080] In the above technical solution, the pressure sensor 10 is used to measure the pressure-time signal output by the combustion explosion of the test sample 13, convert the pressure signal into a charge, voltage or current output signal, and transmit it to the signal converter 11. The signal converter 11 converts the dynamic charge, voltage or current signal of the pressure sensor 10 into a DC voltage signal suitable for the input requirements of the data acquisition instrument 12. The signal converter 11 can adjust its composition structure according to the type of the selected pressure sensor 10 to adapt to the signal conversion requirements of pressure sensors 10 with different principles and ranges. The data acquisition instrument 12 is used for the acquisition, storage, processing and analysis of the output characteristic data of the ignition response of the test sample 13 under thermal stimulation conditions, so as to quantitatively characterize the thermal safety response characteristics of the test sample 13 and evaluate the severity of its thermal runaway response.

[0081] A window mounting hole 2-d is provided on the first flange 2, and a glass window 16 is provided in the window mounting hole 2-d;

[0082] A reflector 17 is provided directly above the glass window 16, and a camera 15 is provided in the output optical path of the reflector 17.

[0083] In the above technical solution, while the glass window 16 is used to maintain the airtight condition of the test working condition, the high-speed camera 15 is used to record the image of the ignition combustion explosion evolution behavior of the test sample 13, which is convenient for subsequent analysis of the response characteristics of the test sample 13 under airtight and thermal stimulation conditions, and the thermal runaway reaction characteristics of the test sample 13 are described by combining the data curves of the temperature sensor 7 and the pressure sensor 10.

[0084] The high-speed camera 15 is used to record the image of the combustion explosion response evolution process of the test sample 13 during the runaway reaction under thermal stimulation conditions, and can be used to characterize the response behavior of the test sample 13 at the moment of thermal runaway. The optical path 17 is used to change the transmission path of the combustion explosion image of the test sample 13, which can avoid installing the high-speed camera 15 on the explosion damage path, and thus avoid serious damage to the high-speed camera 15 caused by the fragments of the glass window 16, explosion shock waves and thermal radiation, etc. when the test sample 13 undergoes a strong explosion.

[0085] Preferably, the window mounting hole 2-d is a round hole with a diameter of 60 mm.

[0086] A sealing ring assembly groove 2-a is preset on the first flange 2, and a sealing ring is provided in the sealing ring assembly groove 2-a.

[0087] In the above technical solution, the sealing ring ensures the seal between the first flange 2 and the test tank 1. The sealing ring assembly groove 2-a is provided with a screw hole 2-b, and the sealing ring is fixed in the sealing ring assembly groove 2-a by setting a bolt in the screw hole 2-b.

[0088] Four side ears 2-c are equidistantly arranged on the circumference of the first flange 2, and a load-bearing column 4 is arranged in the side ear 2-c and fixedly connected to the top of the load-bearing column 4.

[0089] Six heating power supply interfaces 2-e are evenly arranged on the first flange 2 outside the window mounting hole 2-d.

[0090] In the above technical solution, on the premise of ensuring insulation, a heating current of up to 3 kW can be provided for the heating wire 8.

[0091] A fixing groove 3-b is preset at the top center of the second flange 3, and a sample base 14 is arranged in the fixing groove 3-b; a pressure relief valve interface 3-a is arranged on the second flange 3 outside the fixing groove 3-b, and a pressure relief valve 24 is arranged in the pressure relief valve interface 3-a;

[0092] Four linear bearings 3-c are arranged on the circumference of the second flange 3, and the linear bearings 3-c are fixedly sleeved on the corresponding load-bearing columns 4;

[0093] A sealing groove 3-e is preset on the second flange 3, and a sealing ring is arranged in the sealing groove 3-e.

[0094] In the above technical solution, the sealing ring ensures the seal between the second flange 3 and the test tank body 1. The sealing groove 3-e is provided with a second screw hole 3-d, and the sealing ring is fixed in the sealing groove 3-e by arranging bolts in the second screw hole 3-d.

[0095] The movable base 5 includes a support flat plate 5-a fixed on the load-bearing column 4. A cylinder 5-b is arranged at the center of the bottom of the support flat plate 5-a, and the piston of the cylinder 5-b is fixedly installed at the center of the bottom of the second flange 3; a storage box 5-c fixed on the load-bearing column 4 is arranged directly below the support flat plate 5-a, and an air compressor 23 is connected to the cylinder 5-b; casters 5-d are arranged at the bottom of the storage box 5-c.

[0096] In the above technical solution, the support flat plate 5-a is processed and formed from thick stainless steel plates, which is used to stably support the test tank body 1, the first flange 2 and the second flange 3, ensuring the stability and safety of each structure during the entire test process. The cylinder 5-b is installed at the center of the support flat plate 5-a and uses compressed air as the power source to push the second flange 3 to move smoothly along the load-bearing column 4. The storage box 5-c is used to place all installation accessories of the observation system such as bolts, gaskets, spring washers, etc., which is convenient for operation and can avoid the loss of accessories. The air compressor 23 provides compressed air for the cylinder 5-b and is used to support the smooth movement of the second flange 3 during the test assembly process.

[0097] The casters 5-d are used to support the position movement of the movable base 5 and its upper components, facilitating the movement in and out of the blast-resistant chamber during the explosion test.

Claims

1. An observation system for explosive thermal ignition response behavior and output parameters, comprising a frame composed of a plurality of load-bearing columns (4), a movable base (5) being arranged at the bottom of the frame, and a test tank (1) being arranged at the top of the frame; a plurality of interfaces being arranged at the middle of the side wall of the test tank (1); a first flange (2) and a second flange (3) being arranged at the top and the bottom of the test tank (1), respectively; the first flange (2) and the second flange (3) being fixed on the load-bearing columns (4); A heating wire (8) is arranged in the test tank body (1), and the upper end of the heating wire (8) is fixed on the first flange (2); a heat-insulating layer (9) is arranged on the inner wall of the test tank body (1); A cooling module (25) is provided on the side wall of the test tank (1), and a cooling water circulation pump (26) is connected to the cooling module (25); A sample base (14) is provided at the top of the second flange (3), and a pressure relief valve (24) is provided at the bottom of the second flange (3); It also includes a heating control module, an atmosphere adjustment module, a safety status control module and a data acquisition module; The heating control module is used to control the temperature of the test sample (13) during the test; The atmosphere adjustment module is used to control the initial test atmosphere conditions inside the test tank (1); The safety status control module is used to monitor and test the high-pressure gas products inside the tank (1) after the release test; The data acquisition module is used to acquire and process the internal pressure signal of the test tank (1).

2. The observation system for explosive thermal ignition response behavior and output parameters as claimed in claim 1, characterized in that: The interfaces include a pressure measurement interface (1-a), a temperature measurement interface (1-b), a heat flux measurement interface (1-c), an inflation and vacuum interface (1-d), a balancing valve interface (1-e) and a standby measurement interface (1-f); The upper and lower ends of the test tank body (1) are respectively provided with flange connection holes (1-g) and prefabricated sealing grooves (1-h), and a sealing ring is provided in the prefabricated sealing grooves (1-h).

3. The observation system for explosive thermal ignition response behavior and output parameters as claimed in claim 2, characterized in that: The heating control module comprises a remote heating controller (6) and a temperature sensor (7); the temperature sensor (7) is arranged on a temperature measurement interface (1-b) of a test tank body (1), and a temperature sensing head of the temperature sensor (7) is suspended in the air inside the test tank body (1); the temperature sensor (7) is electrically connected to the remote heating controller (6), and the remote heating controller (6) is electrically connected to the heating wire (8).

4. The observation system for explosive thermal ignition response behavior and output parameters as claimed in claim 2, characterized in that: The atmosphere adjustment module comprises an inflation valve (21) arranged on the inflation and vacuum interface (1-d) of the test tank body (1), the inflation valve (21) is connected to a four-way valve, the second end and the third end of the four-way valve are respectively connected to a compressed gas cylinder (20), the fourth end of the four-way valve is provided with a vacuum pump (19), and a pressure gauge (22) is provided between the four-way valve and the inflation valve (21).

5. The observation system for explosive thermal ignition response behavior and output parameters as claimed in claim 3, characterized in that: The safety state control module comprises a balancing valve (18) and a pressure relief valve (24); the balancing valve (18) is arranged on a balancing valve interface (1-e) of the test tank body (1); the pressure relief valve (24) is arranged on the second flange (3); and the pressure relief valve (24) is electrically connected to the remote heating controller (6).

6. The observation system for explosive thermal ignition response behavior and output parameters as claimed in claim 2, characterized in that: The data acquisition module comprises a pressure sensor (10) arranged on a pressure measurement interface (1-a) of a test tank (1), and a signal converter (11) and a data acquisition instrument (12) are sequentially connected to the pressure sensor (10).

7. The observation system for explosive thermal ignition response behavior and output parameters as claimed in claim 1, characterized in that: A window mounting hole (2-d) is provided on the first flange (2), and a glass window (16) is provided in the window mounting hole (2-d); A reflector (17) is arranged directly above the glass window (16), and a camera (15) is arranged in the output light path of the reflector (17).

8. The observation system for explosive thermal ignition response behavior and output parameters as claimed in claim 1, characterized in that: A sealing ring assembly groove (2-a) is preset on the first flange (2), and a sealing ring is arranged in the sealing ring assembly groove (2-a).

9. The observation system for explosive thermal ignition response behavior and output parameters as claimed in claim 1, characterized in that: Four side ears (2-c) are arranged at equal intervals on the circumference of the first flange (2), and a load-bearing column (4) is arranged in the side ear (2-c) and is fixedly connected to the top of the load-bearing column (4).

10. The observation system for explosive thermal ignition response behavior and output parameters as claimed in claim 7, characterized in that: Six heating power supply interfaces (2-e) are evenly arranged on the first flange (2) located outside the window mounting hole (2-d).

11. The observation system for explosive thermal ignition response behavior and output parameters as claimed in claim 5, characterized in that: A fixing groove (3-b) is preset at the top center of the second flange (3), and the sample base (14) is arranged in the fixing groove (3-b); a pressure relief valve interface (3-a) is arranged on the second flange (3) outside the fixing groove (3-b), and the pressure relief valve (24) is arranged in the pressure relief valve interface (3-a); Four linear bearings (3-c) are arranged on the circumference of the second flange (3), and the linear bearings (3-c) are fixedly sleeved on the corresponding load-bearing columns (4); A sealing groove (3-e) is preset on the second flange (3), and a sealing ring is arranged in the sealing groove (3-e).

12. The observation system for explosive thermal ignition response behavior and output parameters as claimed in claim 1, characterized in that: The movable base (5) comprises a supporting plate (5-a) fixed on the load-bearing column (4); a cylinder (5-b) is arranged at the bottom center of the supporting plate (5-a); the piston of the cylinder (5-b) is fixedly installed at the bottom center of the second flange (3); a storage box (5-c) fixed on the load-bearing column (4) is arranged directly below the supporting plate (5-a); an air compressor (23) is connected to the cylinder (5-b); and casters (5-d) are arranged at the bottom of the storage box (5-c).

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