Visual cloud detonation test device

Abstract

The invention relates to the technical field of visual cloud detonation tests, in particular to a visual cloud detonation test device which comprises a device body, an ignition system, a condensation system, an air injection system, a vacuumizing system and a central control system. The ignition system comprises an electronic igniter, an ignition electrode bar and a resistance wire, the electronic igniter is connected with the ignition electrode bar, and a reserved ignition hole is formed in the bottom of the device body; the condensation system comprises a condensation circulator and a circulation line, and the condensation circulator is connected with the circulation line; according to the visual cloud and mist detonation test device, the visual multifunctional multi-pulse cloud and mist detonation test device is established, the application range is wide, and the visual cloud and mist detonation test device is suitable for experimental conditions under various working conditions such as plateau, medium and high pressure environments, high temperature, low temperature and complex environment conditions and is particularly suitable for detonation measurement and evaluation research of air fuel.

Description

Technical Field

[0001] The invention relates to the technical field of visualized cloud and fog detonation testing, in particular to a visualized cloud and fog detonation testing device. Background Art

[0002] Cloud-to-air explosive weapons can achieve efficient destruction of large-scale surface targets, and are particularly suitable for attacking hidden and protected targets under complex environmental conditions, playing an important deterrent role on the battlefield. When cloud-to-air explosive weapons are in action, the solid-liquid mixed cloud-to-air explosive fuel is first dispersed under the action of the central charge explosion, mixed with air to form a multiphase cloud with uniform concentration, and then detonated to achieve cloud explosion. The formation of multiphase cloud and its detonation law are important bases for the structural design of solid-liquid mixed fuel cloud-to-air explosive warheads. Unlike other weapons and equipment charges, cloud explosion requires the fuel to be fully mixed with the ambient air. Changes in ambient temperature, pressure and humidity have a great influence on the phase state of liquid fuel, air resistance, etc., thus affecting the multiphase cloud formation process. The process of solid-liquid mixed fuel dispersion to form multiphase cloud includes complex processes such as droplet breakup and atomization, particle collision and breakup, particle-droplet collision and adsorption, involving disciplines such as fluid mechanics, interface stability, multiphase flow and heat transfer medium. Due to the complexity of the formation mechanism of multiphase cloud, there are few related studies, and the mechanism of the environmental temperature, pressure and humidity on the formation process of multiphase cloud is still unclear.

[0003] Conducting research on the formation process of multiphase clouds under different environmental conditions is of great significance to the fields of industry, agriculture, fire protection, environment, internal combustion engines, and military. It can provide a scientific basis for preventing explosion accidents caused by combustible dust and liquid fuel leakage in industrial production under different environmental conditions. It can provide a reference for the uniform spreading of pesticides and fertilizers in agricultural production under different climatic conditions. It can provide a reference for the spreading of flame retardants and the use of fire-fighting ammunition during large-scale fires such as mountain fires, forests, and fires. It can provide a reference for the formation and prevention of suspended particles in environmental PM2.5. It can provide a technical reference for the atomization of liquid fuels for internal combustion engines under different environmental conditions. In terms of national defense and military, it can provide scientific support for the control of the dispersed state of solid-liquid mixed cloud explosion fuels under different environments, and provide a scientific basis for the structural design of cloud explosion weapon warheads. It is of great significance to the development and application of advanced cloud explosion weapons. Domestic and foreign scholars have conducted extensive experimental and simulation research on the multiphase cloud formation process and cloud explosion, but there are relatively few studies combining environmental parameters. Environmental parameters have not yet established an organic connection with multiphase cloud formation and cloud explosion, and the influence mechanism of environmental parameters on the concentration distribution law and multiphase cloud explosion characteristics in the multiphase cloud formation process is still unclear. Large-scale experiments have limitations due to the inability to conduct a large number of experiments due to the site and environment. Therefore, it is necessary to design a cloud explosion experimental equipment system and method that can quickly establish different vacuum environments and complex environments, and can repeatedly withstand negative pressure, low temperature and other complex conditions, so as to better carry out vacuum or different vacuum multiphase cloud explosion characteristics and related experimental research, which can be used for high-energy fuel explosion testing and evaluation. Summary of the invention

[0004] The object of the present invention is to provide a visualized cloud explosion test device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a visual cloud explosion test device, comprising: a device body, an ignition system, a condensation system, an injection system, a vacuum system, and a central control system; The ignition system comprises an electronic igniter, an ignition electrode rod and a resistance wire, the electronic igniter is connected to the ignition electrode rod, and a reserved ignition hole is arranged at the bottom of the device body; The condensation system comprises a condensation circulation machine and a circulation line, wherein the condensation circulation machine is connected to the circulation line; The jet system includes an air compressor, an air storage tank, a solenoid valve, a liquid storage tank and a uniform jet mechanism, each component is connected through a pipeline, and the uniform jet mechanism is connected to the device body; The vacuum system comprises a vacuum pump and a vacuum gauge; The device body is provided with two symmetrical visualization windows for observing and recording the situation inside the device body and the temperature field changes, and sealing rings are provided between the various components of the device body; A temperature sensor is provided on the main body of the device for measuring the temperature of cloud explosion; A pressure sensor is provided on the device body for measuring the cloud explosion pressure.

[0006] Furthermore, the device body includes a cylindrical tank body, a first end cover and a second end cover, and the first end cover and the second end cover are both sealed and connected to the tank body via a flange assembly.

[0007] Further, a mounting hole is provided on the tank body and corresponds to the uniform spraying mechanism, and the uniform spraying mechanism includes a connecting pipe, a connecting sleeve, a positioning sleeve, an introduction member and a spraying member, the connecting pipe is fixedly passed through the mounting hole, one end of the connecting pipe located outside the tank body is communicated with the connecting sleeve, an internal thread is provided inside the connecting sleeve, and an external thread is provided at one end of the positioning sleeve close to the connecting sleeve, and a sealing gasket is provided inside the connecting sleeve; One end of the positioning sleeve is threadedly connected to the connecting sleeve, and the positioning sleeve is sealed with the connecting sleeve via a sealing gasket, and the pipeline and the connecting sleeve are detachably connected; The introduction member is located between the positioning sleeve and the connecting pipe, the spraying member is located inside the tank body, and the introduction member is used to drive the spraying member.

[0008] Furthermore, the introduction member includes a fixed frame, a rotating rod, a driving bevel gear and a rotating fan, both ends of the fixed frame are fixedly connected to the inner wall of the positioning sleeve, the rotating rod passes through the fixed frame, and the rotating rod is rotatably connected to the fixed frame, one end of the rotating rod extends to the connecting pipe, the rotating rod is fixedly connected to the driving bevel gear, the other end of the rotating rod is fixedly connected to the rotating fan, the driving bevel gear is connected to the ejection member, and the function of introducing the substance is realized through the introduction member.

[0009] Furthermore, the ejection member includes an annular frame, a sealing member, a positioning member, a helical gear ring and an exhaust member, the annular frame is slidably connected to the inside of the tank body, two sealing members are provided, the two sealing members are located at both ends of the outer side of the annular frame, and the annular frame is connected to the inner wall of the tank body through the sealing member; There are a plurality of positioning members, which are fixedly mounted on the inner wall of the tank body in a circumferential manner, and positioning grooves are provided on the annular frame at positions corresponding to the positioning members; The inner ring of the annular frame is provided with an annular opening, and the helical gear ring is located inside the annular opening, the helical gear ring is rotatably connected to the annular frame, and the driving helical gear is meshedly connected to the helical gear ring; The exhaust member is installed at the annular opening and is slidably connected to the inner wall of the tank body, so that a uniform powder spraying or atomizing effect is performed through the provided spraying member.

[0010] Furthermore, a sealing groove is provided on the inner wall of the tank body and at a position corresponding to the seal, and a clamping groove is provided on the outer ring of the annular frame and at a position corresponding to the seal. The seal comprises a sealing rubber outer ring, which is located at the clamping groove and is cooperatively connected with the sealing groove. Through the provided seal, the annular frame and the inner wall of the tank body are sealed and connected.

[0011] Furthermore, the exhaust member includes an air intake shell, an air guide pipe and an exhaust pipe, one end of the air intake shell is rotatably connected to the annular opening, and the other end of the air intake shell is fixedly connected to the inner wall of the helical gear ring; There are multiple air guide pipes, one end of each of which is connected to the air intake shell, and the other end of each of which is connected to the exhaust pipe. The multiple exhaust pipes are slidably connected to the inner wall of the tank body. One side of the exhaust pipe facing the inside of the tank body is provided with multiple spray holes at equal distances, and the exhaust parts are provided to discharge the airflow.

[0012] Furthermore, the positioning member includes a positioning plate, a positioning block and a buffer connecting member, one end of the positioning block is clamped in the positioning groove, and the other end of the positioning block is fixedly connected to the positioning plate, the positioning plate is connected to the buffer connecting member, and the buffer connecting member is fixedly installed on the inner wall of the tank body, and the positioning member is provided to achieve the function of positioning the annular frame.

[0013] Furthermore, the buffer connecting member includes a supporting sleeve, a supporting spring and a supporting rod. The supporting sleeve is fixedly mounted on the inner wall of the tank body, one end of the supporting spring is fixedly connected to the inner wall of the tank body, and the other end of the supporting spring is fixedly connected to the supporting rod. One end of the supporting rod passes through the supporting sleeve and is fixedly connected to the positioning plate, and the supporting rod is slidably connected to the supporting sleeve, thereby realizing the function of connecting the positioning plate.

[0014] Furthermore, the temperature sensor and the pressure sensor are connected to the tank body through a universal base using universal holes reserved in the device body, and are electrically connected to an external control system, thereby realizing the function of detecting the pressure and temperature inside the tank body.

[0015] The present invention has at least the following beneficial effects: The present invention establishes a visualized multifunctional multi-pulse cloud detonation test device, which is widely applicable and suitable for experimental conditions in various working conditions such as plateau, medium-high and low pressure environments, high temperature, low temperature, and complex environmental conditions, and is particularly suitable for air fuel detonation measurement and evaluation research; When the present invention is used, a uniform spraying mechanism is provided on the tank body, so that during the experiment, uniform powder spraying or uniform spraying can be performed, thereby further ensuring the uniformity of the multi-phase cloud concentration during the experiment and further ensuring the precise performance of the experiment; The uniform spraying mechanism of the present invention can not only realize uniform powder spraying or spraying, but also, when the tank body is being cleaned, water flow can be sprayed into the interior of the tank body through the uniform spraying mechanism, further assisting the tank body in rapid cleaning; The device of the present invention has a visualization window made of pressure-resistant quartz glass to observe the reaction changes inside the device for better observation. However, the pressure resistance of this material is limited and is only applicable to pressures below 5 MPa. The ignition electrode on the device of the present invention is used to ignite multi-phase cloud fuel and is easy to disassemble, so that the experiment is not limited by the site. The pressure sensor is used to collect the explosion pressure after the explosion. The vacuum pump is used to evacuate the tank before the experimental test. The pressure gauge is used to monitor the vacuum condition in the tank. The control processing system and the data acquisition system are integrated together, which greatly facilitates the experimental process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front view of the visual multifunctional multi-pulse cloud detonation test device of the present invention; Figure 2 A top view of the flange cover of the present invention; Figure 3 It is a schematic diagram of the tank structure of the present invention; Figure 4 It is a schematic diagram of the internal structure of the tank body of the present invention; Figure 5 This is a schematic diagram of the exhaust pipe structure of the present invention; Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure of the middle A area; Figure 7 This is a schematic diagram of the internal structure of the positioning sleeve of the present invention; Figure 8 This is a schematic diagram of the ring frame structure of the present invention; Fig. 9 This is a schematic diagram of the positioning plate structure of the present invention; Fig.10 For the present invention Fig. 9 Schematic diagram of the enlarged structure of the middle B area; Fig.11 This is a schematic diagram of the air intake housing structure of the present invention; Fig.12 This is a schematic diagram of the positioning plate structure of the present invention; Fig.13 For the present invention Fig.12 Schematic diagram of the enlarged structure of the middle C area; Fig.14 This is a diagram of the detonation pressure of ether in the present invention under different pressure conditions simulated inside the device; Fig.15 This is a diagram of the detonation pressure of ether in the present invention under simulated different temperature conditions inside the device.

[0017] In the figure: 1, electronic igniter; 2, vacuum pump; 3, vacuum gauge; 4, temperature sensor; 5, pressure sensor; 6, uniform ejection mechanism; 61, connecting pipe; 62, connecting sleeve; 63, positioning sleeve; 64, introduction piece; 641, fixing frame; 642, rotating rod; 643, driving bevel gear; 644, rotating fan; 65, ejection piece; 651, annular frame; 6511, positioning groove; 6512, annular mouth; 66, sealing piece; 661, sealing rubber outer ring; 67, positioning piece; 671, positioning plate; 672, positioning block; 673, buffer connection piece; 67 31. Support sleeve; 6732. Support spring; 6733. Support rod; 68. Bevel gear ring; 69. Exhaust member; 691. Inlet shell; 692. Air guide pipe; 693. Exhaust pipe; 6931. Spray hole; 7. Liquid storage tank; 8. Condensing circulation machine; 9. Circulation line; 10. Solenoid valve; 11. Gas storage tank; 12. Air compressor; 13. Lifting ear; 14. Ignition electrode rod; 15. Visualization window; 16. Resistance wire; 17. Sealing ring; 18. Reserved ignition hole; 19. Ball valve; 20. Tank body; 201. Sealing groove; 21. First end cover; 22. Second end cover. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Embodiment 1

[0019] A visualized cloud explosion test device, comprising: a device body, an ignition system, a condensation system, an injection system, a vacuum system, and a central control system; The device body includes a cylindrical tank body 20, a first end cover 21 and a second end cover 22. The first end cover 21 and the second end cover 22 are both sealed and connected to the tank body 20 through a flange assembly. The tank body 20 is 790 mm long, has an inner diameter of 200 mm, an outer diameter of 240 mm, a volume of about 20 l, and a wall thickness of 20 mm. Two visual windows are arranged on the side of the tank body 20, with a size of 40 mm*83 mm*3 mm. The visual windows are made of pressure-resistant quartz glass, which can withstand a pressure of 5 MPa, and are sealed by a sealing ring 17; The flange assembly of the device body includes a flange plate, a flange cover, and a sealing ring 17. The flange plate is clamped at the opening of the device, the flange cover is buckled on the flange plate, and connected by threads. The sealing ring 17 is clamped between the flange plate and the flange cover; the flange cover is provided with an electrode threaded hole, an air inlet and outlet hole, a pressure hole, a temperature hole, and a lifting lug 13; The sealing ring 17 is placed between the flange and the flange cover, so that the flange and the flange cover are completely sealed and closed, forming a closed space for the device. At the same time, the tank body 20 and the flange cover are made of carbon steel, and the tank body 20 can withstand a pressure of about 10 MPa; The ignition system includes an electronic igniter 1, an ignition electrode rod 14 and a resistance wire 16. The resistance wire 16 generates heat to ignite the cloud fuel in the device, thereby achieving an initiation effect.

[0020] The ignition electrode rod 14 is inserted into the center position of the device through the insulated electrode threaded hole and connected with the resistance wire 16 to form an ignition device.

[0021] The reserved ignition hole 18 realizes the influence of different ignition positions on the cloud explosion test. When it is not needed, it is sealed by a plug to ensure that the device is in a sealed state; The ball valve 19 is installed on each connecting pipe 61 to control the air tightness of the tank body 20 and protect the components from the risk of being damaged by the gas inside the tank body 20 by controlling the switch.

[0022] A ball valve 19 is installed on the vacuum tube, and a vacuum gauge 3 can also be installed on the vacuum tube between the ball valve 19 and the device to simulate the experimental effects of the device under different vacuum environments; The vacuum gauge 3 can be replaced with a positive pressure gauge at any time according to the test environment to meet the changes in environmental parameters of the tank body 20 and monitor the pressure value of the device at any time.

[0023] The temperature sensor 4 and the pressure sensor 5 are both connected to the tank body 20 through a universal base using a reserved universal hole, and are both electrically connected to an external control system.

[0024] The condensation system is mainly composed of a condensation circulation machine 8 and a circulation line 9. The condensation circulation machine 8 is automatically thermostatically controlled, and the condensate circulates in and out through the circulation line 9 on the device to achieve a cooling and constant temperature effect.

[0025] The jet system is composed of an air compressor 12, an air storage tank 11, a solenoid valve 10, a liquid storage tank 7 and a uniform spraying mechanism 6. Each component is connected through a pipeline. The air compressor 12 stores air in the air storage tank 11. The solenoid valve 10 is used to control the powder blowing force and time, so as to be more conducive to the uniformity of the powder spraying in the device. The vacuum system consists of a vacuum pump 2 and a vacuum gauge 3. The vacuum degree range is 1*105~1*10-1pa. A dry screw vacuum pump 2 is used for rapid vacuuming. The effective pumping speed is 145m3 / h. The internal pressure state of the device can be adjusted at will, and the test conditions at different altitudes can be simulated. The central control system consists of a digital collector, an amplifier, and a computer, which is connected to the temperature sensor 4 and the pressure sensor 5 on the device. The amplifier amplifies the signal, and the digital collector collects the signal to the computer terminal for processing; The temperature sensor 4 and the pressure sensor 5 are both connected to the tank body 20 through the universal base using the reserved universal holes, and are both electrically connected to the external central control system; The visualized multifunctional multi-pulse cloud explosion test device can be used in conjunction with supporting auxiliary equipment such as high-speed cameras and infrared acquisition devices to analyze the performance of cloud explosions in multiple dimensions; A mounting hole is provided on the tank body 20 corresponding to the uniform spraying mechanism 6. The uniform spraying mechanism 6 includes a connecting pipe 61, a connecting sleeve 62, a positioning sleeve 63, an introduction member 64 and a spraying member 65. The connecting pipe 61 is fixedly passed through the mounting hole. One end of the connecting pipe 61 located outside the tank body 20 is communicated with the connecting sleeve 62. An internal thread is provided inside the connecting sleeve 62. An end of the positioning sleeve 63 close to the connecting sleeve 62 is provided with an external thread. A sealing gasket is provided inside the connecting sleeve 62. One end of the positioning sleeve 63 is threadedly connected to the connecting sleeve 62, and the positioning sleeve 63 is sealed with the connecting sleeve 62 through a sealing gasket, and the pipeline is detachably connected to the connecting sleeve 62; The introduction member 64 is located between the positioning sleeve 63 and the connecting pipe 61 , the spraying member 65 is located inside the tank body 20 , and the introduction member 64 is used to drive the spraying member 65 .

[0026] The introduction member 64 includes a fixed frame 641, a rotating rod 642, a driving bevel gear 643 and a rotating fan 644. Both ends of the fixed frame 641 are fixedly connected to the inner wall of the positioning sleeve 63. The rotating rod 642 passes through the fixed frame 641, and the rotating rod 642 is rotatably connected to the fixed frame 641. One end of the rotating rod 642 extends to the connecting pipe 61, and the rotating rod 642 is fixedly connected to the driving bevel gear 643. The other end of the rotating rod 642 is fixedly connected to the rotating fan 644, and the driving bevel gear 643 is connected to the ejection member 65.

[0027] The ejection member 65 includes an annular frame 651, a sealing member 66, a positioning member 67, a helical gear ring 68 and an exhaust member 69. The annular frame 651 is slidably connected to the inside of the tank body 20. Two sealing members 66 are provided. The two sealing members 66 are located at both ends of the outer side of the annular frame 651. The annular frame 651 is connected to the inner wall of the tank body 20 through the sealing members 66. There are multiple positioning members 67, which are fixedly mounted on the inner wall of the tank body 20, and positioning grooves 6511 are provided on the annular frame 651 at positions corresponding to the positioning members 67; The inner ring of the annular frame 651 is provided with an annular opening 6512, and the bevel gear ring 68 is located inside the annular opening 6512. The bevel gear ring 68 is rotatably connected to the annular frame 651, and the driving bevel gear 643 is meshedly connected to the bevel gear ring 68; The exhaust member 69 is installed at the annular opening 6512 , and the exhaust member 69 is slidably connected to the inner wall of the tank body 20 .

[0028] A sealing groove 201 is provided on the inner wall of the tank body 20 and corresponds to the position of the sealing member 66 , and a clamping groove is provided on the outer ring of the annular frame 651 and corresponds to the position of the sealing member 66 . The sealing member 66 includes a sealing rubber outer ring 661 , which is located at the clamping groove and is matched and connected with the sealing groove 201 .

[0029] The exhaust member 69 includes an air intake shell 691, an air guide pipe 692 and an exhaust pipe 693. One end of the air intake shell 691 is rotatably connected to the annular opening 6512, and the other end of the air intake shell 691 is fixedly connected to the inner wall of the helical gear ring 68. There are multiple air guide pipes 692, one end of each of the multiple air guide pipes 692 is connected to the air inlet shell 691, and the other end of the air guide pipe 692 is connected to the exhaust pipe 693, the multiple exhaust pipes 693 are slidably connected to the inner wall of the tank body 20, and the exhaust pipe 693 is provided with multiple spray holes 6931 at equal distances on one side facing the inside of the tank body 20.

[0030] The positioning member 67 includes a positioning plate 671, a positioning block 672 and a buffer connector 673. One end of the positioning block 672 is clamped in the positioning groove 6511, and the other end of the positioning block 672 is fixedly connected to the positioning plate 671. The positioning plate 671 is connected to the buffer connector 673, and the buffer connector 673 is fixedly installed on the inner wall of the tank body 20.

[0031] The buffer connector 673 includes a support sleeve 6731, a support spring 6732 and a support rod 6733. The support sleeve 6731 is fixedly mounted on the inner wall of the tank body 20. One end of the support spring 6732 is fixedly connected to the inner wall of the tank body 20, and the other end of the support spring 6732 is fixedly connected to the support rod 6733. One end of the support rod 6733 passes through the support sleeve 6731 and is fixedly connected to the positioning plate 671. The support rod 6733 is slidably connected to the support sleeve 6731.

[0032] The temperature sensor 4 and the pressure sensor 5 are both connected to the tank body 20 through the universal base using the universal holes reserved in the device body, and are both electrically connected to the external control system; Specific implementation process: when the annular frame 651 is installed on the tank body 20, the annular frame 651 is moved to the inside of the tank body 20, and at the same time, the two sealing rubber outer rings 661 on the outer wall of the annular frame 651 correspond to the two sealing grooves 201 on the inner wall of the tank body 20, so that the annular frame 651 and the tank body 20 are relatively sealed, and at the same time, the four positioning grooves 6511 on the annular frame 651 correspond to the positioning blocks 672, and then the positioning blocks 672 are further fixed to the annular frame 651 under the connection of the positioning rod, the support rod 6733 and the support spring 6732. This arrangement facilitates the detachable connection between the annular frame 651 and the tank body 20. At the same time, in the present invention, each component inside the tank body 20 can withstand a pressure of 10 MPa, so as to prevent the annular frame 651 and other components from being affected by the detonation experiment; At the same time, after installation, one end of the positioning sleeve 63 is sealed and connected to the connecting sleeve 62, and after the positioning sleeve 63 is connected, the corresponding driving bevel gear 643 at the positioning sleeve 63 is meshed with the bevel gear ring 68, so as not to affect the installation of the annular frame 651; When the experiment is carried out and it is necessary to spray or powder the inside of the tank body 20, one end of the spray pipe of the sprayer is connected to the positioning sleeve 63. Then, while spraying, the flowing particles drive the fan blades to rotate. When the fan blades rotate, the rotating rod 642 further drives the driving bevel gear 643 to rotate. When the driving bevel gear 643 rotates, the bevel gear ring 68 rotates. At the same time, the spray passes through the positioning sleeve 63 into the connecting sleeve 62, and then enters the annular frame 651 through the connecting pipe 61, and then passes through The air inlet shell 691 of the annular frame 651 enters into the multiple air guide pipes 692 respectively, and finally enters into the exhaust pipe 693 respectively through the multiple air guide pipes 692, and the gas is discharged through the exhaust pipe 693. At the same time, in this process, since the bevel gear ring 68 rotates, the air inlet shell 691, the air guide pipe 692 and the exhaust pipe 693 rotate synchronously, so that the multiple exhaust pipes 693 rotate around the inside of the tank body 20 and spray spray through the spray hole 6931, further realizing the effect of uniformly distributing the spray inside the tank body 20, thereby facilitating the subsequent experiments; At the same time, in the present invention, when the tank body 20 is cleaned, it can be tightly connected with the positioning sleeve through a pipeline, and the cleaning liquid can be passed into the interior of the positioning sleeve, so that the air intake shell 691 drives multiple air guide pipes 692 and exhaust pipes 693 to scrape and clean the inner wall of the tank body 20 while spraying and cleaning the interior of the tank body 20, thereby facilitating the experiment. Embodiment 2

[0033] A visual multifunctional multi-pulse cloud detonation test device can simulate five systems to realize tests under multi-dimensional complex environments such as vacuum, high pressure, high temperature and low temperature, which can fill the gaps and deficiencies in the research on the energy release characteristics of fuel clouds in complex environments.

[0034] First, fix the resistance wire 16 (fusible) on the ignition electrode rod 14, and control the distance between the two electrode rods to be 2mm, and place it in the upper center of the tank body 20. The ignition electrode rod 14 can also be placed through the reserved ignition hole 18 below the tank body 20, according to the influence of different ignition positions on the energy release of the fuel cloud detonation; Then place the polytetrafluoroethylene sealing ring 17 between the flange cover and the flange plate, and use sealing stud bolts (M27*120) to fix and seal the flange cover and the flange plate together through the upper sealing bolt hole and the lower sealing bolt hole.

[0035] Before the experiment, the airtightness of the tank body 20 must be ensured, the experimental tank body 20 must be installed and debugged, and the ignition electrode, pressure sensor 5, vacuum pump 2, vacuum pressure gauge, data acquisition system, control system, etc. must be in good condition. The tank body 20 and the entire system must be in a closed state, the vacuum line must be opened, and the vacuum pump 2 must be turned on to evacuate it. Through monitoring by the vacuum pressure gauge, the tank body 20 must be evacuated to the desired vacuum degree, and the vacuum line must be closed and maintained for 5 minutes. By observing the changes in the readings of the vacuum pressure gauge, it can be determined whether the airtightness is good. After ensuring that the air tightness is good, turn on the condenser, and the condensate passes through the circulation pipeline on the tank body 20 to cool the temperature of the tank body 20 to the set temperature and keep it stable. Then, the gas cylinder is inflated by the air compressor, and the opening and closing of the gas cylinder is controlled by the solenoid valve 10. The liquid storage tank 7 is sprayed into the cavity of the tank body 20 at the same time and evenly, and evenly mixed. Then, the ignition electrode is ignited to ignite the fuel cloud of the tank body 20. The pressure is measured by the data acquisition system sensor. After each experiment, the tank body 20 is purged and cleaned to reduce the impact of residues on the next experiment. In addition, the tank body 20 is provided with a double-opening observation window made of explosion-proof glass that is resistant to high temperature and high pressure, so that the combustion and explosion characteristics of the fireball in a closed environment can be observed. Infrared equipment and other external equipment can be placed in appropriate observation positions to observe other performance parameters. This tank body 20 has strong repeatability, simple operation, and is suitable for repeated experiments. Embodiment 3

[0036] This device can simulate the diffusion and explosion process of fuel under different pressure conditions. Through five major system simulations, it can realize the test under vacuum, high pressure, high temperature and low temperature multi-dimensional complex environment conditions. The pressure sensor 5 is arranged on the flange end cover, and a pair of sensors are symmetrically placed on both sides of the tank body 20. The pneumatic pipeline consists of four stainless steel gas storage tanks 11 with a volume of 4l, a solenoid valve 10, a liquid storage box with a volume of 20ml, a ball valve and a sprayer. The ignition system consists of an ignition electrode rod 14 and a resistance wire 16. The ignition energy is 90J, the ignition delay time is 50ms, and the opening time of the solenoid valve 10 is 50ms. The mass concentration of ether is selected to be 100~500g.m-3. The specific steps are as follows: clean the tank body 20, confirm Ensure that the interior is clean, then close the ball valve 2 and put the ether sample into the liquid storage box, turn on the air compressor 12, and make the pressure of the gas cylinder reach 0.4 MPa; turn on the data acquisition system, set the sampling frequency to 1 MHz / s, the sampling time to 1 s, turn on the vacuum pump 2, adjust the pressure of the explosion container, open the ball valve 4 during the adjustment process, turn on the igniter, and set the ignition energy to 90 J. After ignition, the pressure curve decreases as the initial pressure inside the tank 20 decreases, and reaches the maximum value when the explosion reaction is completed. Then, due to heat loss, the pressure gradually decreases with the passage of time; during the test, this device also places infrared instruments and high-speed cameras outside the device to capture the fireball at the moment of the internal explosion through the double-open observation windows. The detonation pressure data of ether under different pressure conditions can be simulated inside this device, such as Fig.14 As shown: Embodiment 4

[0037] This device can simulate the diffusion and explosion process of fuel under different temperature conditions. Through five major system simulations, it can realize the test under vacuum, high pressure, high temperature and low temperature multi-dimensional complex environment conditions. The temperature sensor 4 is arranged on the flange end cover, and a pair of pressure sensors 5 are symmetrically placed on both sides of the tank body 20. The pneumatic pipeline is composed of a stainless steel gas storage tank 11 with a volume of 4l, a solenoid valve 10, a liquid storage box with a volume of 20ml, a ball valve, and a sprayer. The ignition system is composed of an ignition electrode rod 14 and a resistance wire 16. The ignition energy is 90J, the ignition delay time is 50ms, the opening time of the solenoid valve 10 is 50ms, and the mass concentration of ether is selected to be 100~500g.m-3. The specific steps are as follows: clean the tank body to ensure that the inside is clean, and then close the ball valve. Valve, put the ether sample into the liquid storage box, turn on the air compressor, so that the pressure of the gas cylinder reaches 0.4 MPa; turn on the data acquisition system, set the sampling frequency to 1 MHz / s, the sampling time to 1 s, turn on the condenser, set the required temperature, the condensate circulates in the circulation pipeline, adjust the temperature of the device to the required temperature, open the ball valve 4 during the adjustment process, and then turn on the igniter, set the ignition energy to 90 J, after ignition, the pressure curve increases with the decrease of the initial temperature inside the tank, and reaches the maximum value when the explosion reaction is completed. Then, due to heat loss, the pressure gradually decreases with the passage of time. During the test, this device also placed an infrared instrument and a high-speed camera outside the device to capture the fireball at the moment of the internal explosion through the double-open observation window. The detonation pressure data of ether under different temperature conditions can be simulated inside this device, such as Fig.15 As shown: Embodiment 5

[0038] The device can simultaneously simulate the diffusion and explosion process of fuel under different temperature, pressure and fuel concentration conditions. Through five major system simulations, it can realize the test under vacuum, high pressure, high temperature and low temperature multi-dimensional complex environment conditions. The pressure and temperature sensor 4 is arranged on the flange end cover, and the pressure and temperature sensor 4 is symmetrically placed on both sides of the tank body 20. The pneumatic pipeline is composed of a stainless steel gas storage tank 11 with a volume of 4l, a solenoid valve 10, a liquid storage box with a volume of 20ml, a ball valve, and a sprayer. The ignition system is composed of an ignition electrode rod 14 and a resistance wire 16. The ignition energy is 90J, the ignition delay time is 50ms, and the opening time of the solenoid valve 10 is 50ms. Ether test samples with different mass concentrations are selected. The specific steps are as follows: clean the tank body 20 to ensure that the interior is clean, and then close the ball valve to put the ether sample into the storage Liquid box, turn on the air compressor 12, so that the pressure of the gas cylinder reaches 0.4 MPa; turn on the data acquisition system, set the sampling frequency to 1 MHz / s, the sampling time to 1 s, turn on the condenser, set the required temperature, the condensate circulates in the circulation pipeline, adjust the temperature of the device to the required temperature, open the ball valve 4 and turn on the vacuum pump 2 during the adjustment process, adjust the pressure of the explosion container, open the ball valve 5 and turn on the igniter during the adjustment process, and set the ignition energy to 90 J. After ignition, the pressure curve increases with the decrease of the initial temperature inside the tank body 20, and reaches the maximum value when the explosion reaction is completed. Then, due to heat loss, the pressure gradually decreases with the passage of time; during the test of this device, infrared instruments and high-speed cameras are placed outside the device to capture the fireball situation at the moment of the internal explosion through the double-open observation windows.

[0039] In particular, a multi-dimensional multi-pulse spray test method for studying cloud explosion can realize the analysis of cloud explosion characteristics in different dimensions, make up for the shortcomings of the existing device of single and uneven spray, and overcome some technical difficulties. The specific method is as follows: 1. The tank circulation pipeline is seamlessly connected to the tank wall. The condenser circulates the condensate on the tank through the circulation pipeline, so that the device temperature is controlled at the required temperature and the ambient temperature is controllable; 2. Through the vacuum system and the pressurization system, the environmental pressure of the device can be controlled; 3. Through the double-open observation window, the visualization of the entire device can be maximized, which is convenient for analyzing the explosion performance of the cloud; 4. By designing a uniform spraying mechanism, a large-scale spraying range can be achieved, and linkage can be performed to make the spray more uniform; 5. Through the above means, assisted by external high-speed cameras and infrared light auxiliary equipment, it is possible to analyze cloud burst characteristics in complex environments using multi-dimensional parameters such as temperature, pressure, and fireball.

[0040] The above device is suitable for the study of explosion performance of different solid and liquid fuels. The highlight of this device is that the temperature of the device can be easily controlled by designing a circulation pipeline on the tank body, and a large-size observation window is opened to observe the cloud formation process and explosion characteristics inside the device to overcome technical difficulties. It can simulate the cloud explosion mechanism under different environments such as vacuum, high pressure, negative pressure, low temperature and high temperature. It realizes the functional design of visualization of a small simulation platform for the first time. It is a multifunctional multi-pulse cloud explosion simulation platform that integrates multiple environmental parameters such as temperature controllable, pressure controllable and visualization. By changing the conditions such as the amount of charge and the ignition position, the material selection of the device, and the assistance of high-speed camera, it can achieve more complete functions, simpler and safer functions, and more convenient and simple operation and strong practicality than other cloud explosion platforms.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A visual cloud detonation test device, characterized in that: include: Device body, ignition system, condensation system, jet system, vacuum system, central control system; The ignition system comprises an electronic igniter (1), an ignition electrode rod (14) and a resistance wire (16); the electronic igniter (1) is connected to the ignition electrode rod (14); a reserved ignition hole (18) is provided at the bottom of the device body; The condensation system comprises a condensation circulation machine (8) and a circulation line (9), wherein the condensation circulation machine (8) is connected to the circulation line (9); The jetting system comprises an air compressor (12), an air storage tank (11), a solenoid valve (10), a liquid storage tank (7) and a uniform jetting mechanism (6), wherein the various components are connected via pipelines, and the uniform jetting mechanism (6) is connected to the device body; The vacuum pumping system comprises a vacuum pump (2) and a vacuum gauge (3); The device body is provided with two symmetrical visualization windows (15) for observing and recording the conditions inside the device body and the temperature field changes, and sealing rings (17) are provided between various components of the device body; A temperature sensor (4) is provided on the device body for measuring the temperature of the cloud explosion; A pressure sensor (5) is arranged on the device body for measuring the cloud explosion pressure.

2. A visualized cloud detonation test device according to claim 1, characterized in that: The device body comprises a cylindrical tank body (20), a first end cover (21) and a second end cover (22); the first end cover (21) and the second end cover (22) are both sealedly connected to the tank body (20) via a flange assembly.

3. A visualized cloud detonation test device according to claim 1, characterized in that: A mounting hole is provided on the tank body (20) and corresponds to the uniform spraying mechanism (6). The uniform spraying mechanism (6) comprises a connecting pipe (61), a connecting sleeve (62), a positioning sleeve (63), an introduction member (64) and a spraying member (65). The connecting pipe (61) is fixedly passed through the mounting hole. One end of the connecting pipe (61) located outside the tank body (20) is communicated with the connecting sleeve (62). An internal thread is provided inside the connecting sleeve (62). An end of the positioning sleeve (63) close to the connecting sleeve (62) is provided with an external thread. A sealing gasket is provided inside the connecting sleeve (62). One end of the positioning sleeve (63) is threadedly connected to the connecting sleeve (62), and the positioning sleeve (63) is sealed with the connecting sleeve (62) via a sealing gasket, and the pipeline and the connecting sleeve (62) are detachably connected; The introduction member (64) is located between the positioning sleeve (63) and the connecting pipe (61), the spraying member (65) is located inside the tank body (20), and the introduction member (64) is used to drive the spraying member (65).

4. A visualized cloud detonation test device according to claim 3, characterized in that: The introduction member (64) comprises a fixed frame (641), a rotating rod (642), a driving bevel gear (643) and a rotating fan (644); both ends of the fixed frame (641) are fixedly connected to the inner wall of the positioning sleeve (63); the rotating rod (642) passes through the fixed frame (641), and the rotating rod (642) is rotatably connected to the fixed frame (641); one end of the rotating rod (642) extends to the connecting pipe (61); the rotating rod (642) is fixedly connected to the driving bevel gear (643); the other end of the rotating rod (642) is fixedly connected to the rotating fan (644); and the driving bevel gear (643) is connected to the ejection member (65).

5. The visualized cloud detonation test device according to claim 3, characterized in that: The ejection member (65) comprises an annular frame (651), a sealing member (66), a positioning member (67), a helical gear ring (68) and an exhaust member (69); the annular frame (651) is slidably connected to the inside of the tank body (20); two sealing members (66) are provided, and the two sealing members (66) are located at two ends of the outside of the annular frame (651); and the annular frame (651) is connected to the inner wall of the tank body (20) through the sealing members (66); A plurality of the positioning members (67) are provided, and the plurality of the positioning members (67) are fixedly mounted on the inner wall of the tank body (20) in a circumferential manner, and a positioning groove (6511) is provided on the annular frame (651) at a position corresponding to the positioning member (67); The inner ring of the annular frame (651) is provided with an annular opening (6512), and the helical gear ring (68) is located inside the annular opening (6512), the helical gear ring (68) is rotatably connected to the annular frame (651), and the driving helical gear (643) is meshingly connected to the helical gear ring (68); The exhaust member (69) is installed at the annular opening (6512), and the exhaust member (69) is slidably connected to the inner wall of the tank body (20).

6. A visualized cloud detonation test device according to claim 5, characterized in that: A sealing groove (201) is provided on the inner wall of the tank body (20) at a position corresponding to the sealing member (66); a clamping groove is provided on the outer ring of the annular frame (651) at a position corresponding to the sealing member (66); the sealing member (66) comprises a sealing rubber outer ring (661); the sealing rubber outer ring (661) is located at the clamping groove, and the sealing rubber outer ring (661) is matched and connected to the sealing groove (201).

7. The visualized cloud detonation test device according to claim 5, characterized in that: The exhaust component (69) comprises an air intake shell (691), an air guide pipe (692) and an exhaust pipe (693); one end of the air intake shell (691) is rotatably connected to the annular opening (6512), and the other end of the air intake shell (691) is fixedly connected to the inner wall of the helical gear ring (68); A plurality of the air guide pipes (692) are provided, one end of each of the plurality of air guide pipes (692) is connected to the air intake shell (691), and the other end of each of the air guide pipes (692) is connected to the exhaust pipe (693), the plurality of exhaust pipes (693) are slidably connected to the inner wall of the tank body (20), and a plurality of spray holes (6931) are equidistantly provided on one side of the exhaust pipe (693) facing the inside of the tank body (20).

8. The visualized cloud detonation test device according to claim 5, characterized in that: The positioning member (67) comprises a positioning plate (671), a positioning block (672) and a buffer connecting member (673); one end of the positioning block (672) is clamped in the positioning groove (6511), and the other end of the positioning block (672) is fixedly connected to the positioning plate (671); the positioning plate (671) is connected to the buffer connecting member (673), and the buffer connecting member (673) is fixedly mounted on the inner wall of the tank body (20).

9. A visualized cloud detonation test device according to claim 8, characterized in that: The buffer connection member (673) comprises a support sleeve (6731), a support spring (6732) and a support rod (6733); the support sleeve (6731) is fixedly mounted on the inner wall of the tank body (20); one end of the support spring (6732) is fixedly connected to the inner wall of the tank body (20); and the other end of the support spring (6732) is fixedly connected to the support rod (6733); one end of the support rod (6733) passes through the support sleeve (6731) and is fixedly connected to the positioning plate (671); and the support rod (6733) is slidably connected to the support sleeve (6731).

10. The visualized cloud detonation test device according to claim 1, characterized in that: The temperature sensor (4) and the pressure sensor (5) are both connected to the tank body (20) through a universal base using universal holes reserved in the device body, and are both electrically connected to an external control system.

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