Experimental device for impact initiation rule of liquid explosive

Abstract

The invention relates to the technical field of liquid explosive experiments, and discloses a liquid explosive impact detonation law experiment device, which comprises an experiment unit, the experiment unit comprises an experiment box, an experiment bin, a constraint device, an upper end cover and a plurality of electric probes, the experiment bin is arranged on the side surface of the experiment box, the constraint device is fixedly arranged on the inner wall of the experiment bin, and the upper end cover is arranged on the upper end cover. The upper end cover is arranged on the top face of the restraint device, the electric probes are symmetrically arranged on the two side faces of the restraint device, and pressure relief units are arranged on the side faces of the restraint device. Through the design of adjusting the pre-tightening force of the spring, the device can be flexibly matched with impact force generated by explosion of explosives with different equivalent weights, it is ensured that the plugging barrel accurately opens the pressure relief channel within the pressure threshold value, the problem of response lag of a traditional fixed pressure relief structure is solved, the restraint device is effectively prevented from being damaged due to overpressure, meanwhile, the secondary reaction risk is reduced, and the safety is improved. And reliable safety guarantee is provided for extreme working condition experiments.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid explosive experiments, and particularly to an experimental device for the impact initiation law of liquid explosives. Background Art

[0002] Liquid explosives are a class of explosive substances that are liquid at room temperature. They usually consist of oxidants, fuels, and other additives. Due to their unique physical state, such explosives have advantages in specific application scenarios, such as being able to be transported through pipelines and facilitating the filling of irregularly shaped spaces. However, due to their high energy density and potential danger, extreme caution is required during handling and use, and strict safety specifications must be followed.

[0003] After retrieval, a Chinese patent with the publication number CN219810792U discloses an experimental device for studying the impact initiation and detonation growth law of liquid explosives. The liquid charge is constrained in a restraint, and an electric probe array is used to record the moments when the detonation wave (shock wave) reaches different positions in the tested liquid explosive, providing data support for studying the impact initiation performance of liquid explosives. However, when this scheme is actually used, there are still the following deficiencies: When conducting scientific research on the initiation law of liquid explosives, to ensure that the experimental data have universality covering different energy output scenarios, it is necessary to systematically carry out comparative experiments with multiple equivalent gradients. However, the initiation process of the above experimental device is limited to be completed inside the restraint. Although this design can effectively control the diffusion direction of the initial detonation waveform, at the moment when a high-equivalent explosive releases huge energy, the pressure in the restraint cavity will suddenly rise to the order of hundreds of megapascals within microseconds. If the pressure relief device only relies on a fixed-size flow channel, it is often difficult to dynamically match the pressure peak corresponding to different equivalent explosives, resulting in a serious lag in the pressure relief response behind the actual pressure growth rate. This timing misalignment will not only cause the restraint to bear an instantaneous load far exceeding the material yield strength, leading to plastic deformation or even brittle fracture of the wall, but also may cause a secondary reaction between the remaining high-temperature and high-pressure gas and the unreacted explosive due to incomplete pressure relief, further increasing the risk of structural failure.

[0004] Therefore, it is necessary to design an experimental device for the impact initiation law of liquid explosives to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to propose an experimental device for the impact initiation law of liquid explosives to solve the deficiencies existing in the prior art.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions: An experimental device for the shock initiation law of liquid explosives, including an experimental unit. The experimental unit includes an experimental box, an experimental chamber, a restraint, an upper end cover and a plurality of electric probes. The experimental chamber is opened on the side of the experimental box. The restraint is fixedly installed on the inner wall of the experimental chamber. The upper end cover is arranged on the top surface of the restraint. The plurality of electric probes are symmetrically arranged on the restraint. A pressure relief unit is arranged on the side of the restraint. A linkage assembly, a ventilation unit and a monitoring assembly are arranged inside the experimental chamber; Among them, the pressure relief unit includes a pressure relief sleeve and a plugging cylinder. The pressure relief sleeve is penetrated and arranged on the side of the restraint. An annular groove is opened at the end of the pressure relief sleeve. The plugging cylinder is slidably installed on the inner wall of the annular groove. An adjusting structure is arranged on the pressure relief sleeve.

[0007] As a preferred technical solution of the present invention, the pressure relief unit further includes a plurality of pressure relief holes and a pressure relief cover. The plurality of pressure relief holes are evenly distributed and opened on the outer wall of the plugging cylinder. The pressure relief cover is detachably installed on the outer wall of the pressure relief sleeve, and the plugging cylinder is located inside the pressure relief cover.

[0008] As a preferred technical solution of the present invention, an energy absorption material is arranged on the inner wall of the pressure relief cover. The outer wall of the plugging cylinder is fitted with the inner wall of the annular groove.

[0009] As a preferred technical solution of the present invention, the adjusting structure includes a bracket, a fixing rod, a threaded ring, a guiding ring and an adjusting spring. The bracket is fixedly installed at one end of the pressure relief sleeve inside the pressure relief cover. The bracket includes two thin rods and a ring body fixedly installed between the two thin rods. The fixing rod is slidably installed on the inner wall of the bracket, and the end of the fixing rod is fixedly connected to the side of the plugging cylinder. The threaded ring is threadedly sleeved on the end of the fixing rod close to the plugging cylinder. The guiding ring is slidably sleeved on the outer wall of the fixing rod through a chute and a slider, and the guiding ring is rotatably connected to the threaded ring. The adjusting spring is arranged between the guiding ring and the bracket.

[0010] As a preferred technical solution of the present invention, threads are arranged on the outer wall of the end of the fixing rod close to the plugging cylinder, and anti-slip lines are arranged on the outer wall of the threaded ring.

[0011] As a preferred technical solution of the present invention, the ventilation unit includes a ventilation plate, a plurality of ventilation openings, a baffle, a guiding opening, a top plate and a positioning spring. The ventilation plate is arranged on the inner wall of the experimental chamber. The plurality of ventilation openings are linearly and arrayedly distributed and opened on the side of the ventilation plate. The baffle is slidably installed on the inner wall of the ventilation plate, and the baffle is adapted to the plurality of ventilation openings. The guiding opening is opened on the ventilation plate. The top plate is slidably installed on the inner wall of the guiding opening, and the end of the top plate is fixedly connected to the side of the baffle. The positioning spring is fixedly installed between the top surface of the top plate and the inner top surface of the guiding opening.

[0012] As a preferred technical solution of the present invention, the ventilation plate is connected to the ventilation equipment, and the width of the baffle is greater than the width of the ventilation opening.

[0013] As a preferred technical solution of the present invention, the linkage assembly includes a fixed rack, a shaft rod, a driving gear, a transmission gear, a transmission rack and a transmission rod. The fixed rack is fixedly installed at one end of the fixed rod away from the plugging cylinder. The shaft rod penetrates through the side surface of the pressure relief cover. The driving gear is fixedly installed at one end of the shaft rod inside the pressure relief cover, and the driving gear meshes with the fixed rack. The transmission gear is fixedly installed at one end of the shaft rod outside the pressure relief cover. The transmission rack is slidably installed on the inner wall of the experimental chamber, and the transmission gear meshes with the transmission rack. The transmission rod is slidably installed on the inner wall of the experimental chamber. The bottom end of the transmission rod is fixedly connected to the top surface of the transmission rack, and the top end of the transmission rod is located directly below the top plate. A limiting structure corresponding to the transmission rod is provided on the inner wall of the experimental chamber.

[0014] As a preferred technical solution of the present invention, the limiting structure includes a fixed cylinder, a push rod, a pin block, a support spring, a pin hole and two electromagnets. The fixed cylinder is located at one side of the top end of the transmission rod and is fixedly connected to the inner wall of the experimental chamber. The push rod is slidably installed inside the fixed cylinder. The pin block is fixedly installed at one end of the push rod outside the fixed cylinder. The support spring is fixedly installed between the push rod and the inner wall of the fixed cylinder. The pin hole is opened on the outer wall of the transmission rod. The two electromagnets are respectively fixedly installed at one end of the push rod inside the fixed cylinder and the inner wall of the fixed cylinder.

[0015] As a preferred technical solution of the present invention, the monitoring assembly includes a fixed frame, a rotating shaft, a support rod, a torsion spring, a connecting plate, a top rod and a monitoring sensor. The fixed frame is located below the ventilation plate and is fixedly connected to the inner wall of the experimental chamber. The rotating shaft is rotatably installed inside the fixed frame. The support rod is fixedly sleeved on the outer wall of the rotating shaft. The torsion spring is sleeved on the end of the rotating shaft, and the two ends of the torsion spring are respectively fixedly connected to the fixed frame and the rotating shaft. The connecting plate is fixedly installed at the bottom end of the support rod. The top rod is fixedly installed at the end of the fixed rod, and the end of the top rod passes through the pressure relief cover and is located on the side of the connecting plate. The monitoring sensor is arranged at the top end of the support rod.

[0016] The present invention has the following beneficial effects: 1. By setting the pressure relief sleeve and the pressure relief cover, through the design of adjusting the spring pre-tightening force, the device can flexibly match the impact force generated by the explosion of different equivalent explosives, ensure that the plugging cylinder accurately opens the pressure relief channel within the pressure threshold, avoid the response lag problem of the traditional fixed pressure relief structure, effectively prevent the restraint from being damaged due to overpressure, and at the same time reduce the risk of secondary reaction, providing a reliable safety guarantee for extreme working condition experiments; 2. By setting up a ventilation plate and monitoring sensors, when the explosion shock wave triggers the pressure relief mechanism, the gear-rack transmission assembly automatically opens the ventilation channel, and cooperates with external ventilation equipment to achieve rapid air purification. At the same time, the monitoring sensors are accurately positioned above the pressure relief cover under the drive of the linkage mechanism, and can sense temperature and flame abnormalities in real time and link with the fire extinguishing system. This fully automated process of "trigger - response - reset" not only shortens the post-experiment processing time, but also, through the synergistic effect of the sensors and fire extinguishing equipment, controls the response time to sudden emergencies within milliseconds, significantly reducing the risk of manual operation and the experimental interval period. 3. By setting up an electromagnet and a transmission rod, after the experiment, only need to energize and activate the electromagnet, and the push rod will release the mechanical lock on the transmission rod. Each moving part automatically resets to the initial position under the action of the pre-tightening spring, completely abandoning the cumbersome operations during traditional resetting, reducing the experimental preparation time and accelerating the experimental progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the experimental device for the impact initiation law of liquid explosives proposed by the present invention; Figure 2 is a schematic diagram of a partial cross-sectional structure of the experimental box of the experimental device for the impact initiation law of liquid explosives proposed by the present invention; Figure 3 is a schematic diagram of the experimental chamber structure of the experimental device for the impact initiation law of liquid explosives proposed by the present invention; Figure 4 is Figure 3 the enlarged structure schematic diagram at A in Figure 5 is a schematic diagram of the disassembled structure of the pressure relief sleeve and the pressure relief cover of the experimental device for the impact initiation law of liquid explosives proposed by the present invention; Figure 6 is a schematic diagram of the plugging cylinder structure of the experimental device for the impact initiation law of liquid explosives proposed by the present invention; Figure 7 is a schematic diagram of the ventilation plate structure of the experimental device for the impact initiation law of liquid explosives proposed by the present invention; Figure 8 is a schematic diagram of a partial cross-sectional structure of the fixing cylinder of the experimental device for the impact initiation law of liquid explosives proposed by the present invention; Figure 9 is a schematic diagram of the support rod structure of the experimental device for the impact initiation law of liquid explosives proposed by the present invention; Figure 10 is Figure 9 the enlarged structure schematic diagram at B in

[0018] In the figure: 11, experimental box; 12, experimental chamber; 13, restraint device; 14, upper end cover; 15, electric probe; 21, pressure relief sleeve; 22, plugging cylinder; 23, pressure relief hole; 24, pressure relief cover; 31, bracket; 32, fixed rod; 33, threaded ring; 34, guide ring; 35, adjusting spring; 41, fixed rack; 42, shaft rod; 43, driving gear; 44, transmission gear; 45, transmission rack; 46, transmission rod; 47, ventilation plate; 48, ventilation opening; 49, baffle; 410, guide opening; 411, top plate; 412, positioning spring; 51, fixed cylinder; 52, push rod; 53, pin block; 54, support spring; 55, pin opening; 56, electromagnet; 61, fixed frame; 62, rotating shaft; 63, support rod; 64, torsion spring; 65, connecting plate; 66, ejector rod; 67, monitoring sensor. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0020] Refer to Figure 1-10 , an experimental device for the impact initiation law of liquid explosives, including an experimental unit. The experimental unit includes an experimental box 11, an experimental chamber 12, a restraint device 13, an upper end cover 14 and a plurality of electric probes 15. The experimental chamber 12 is opened on the side of the experimental box 11. The restraint device 13 is fixedly installed on the inner wall of the experimental chamber 12. The upper end cover 14 is arranged on the top surface of the restraint device 13. The plurality of electric probes 15 are symmetrically arranged on the restraint device 13. A pressure relief unit is arranged on the side of the restraint device 13. A linkage assembly, a ventilation unit and a monitoring assembly are arranged inside the experimental chamber 12; Among them, the pressure relief unit includes a pressure relief sleeve 21 and a plugging cylinder 22. The pressure relief sleeve 21 is penetrated and arranged on the side of the restraint device 13. An annular groove is opened at the end of the pressure relief sleeve 21. The plugging cylinder 22 is slidably installed on the inner wall of the annular groove. The outer wall of the plugging cylinder 22 fits with the inner wall of the annular groove. An adjusting structure is arranged on the pressure relief sleeve 21; The pressure relief unit further includes a plurality of pressure relief holes 23 and a pressure relief cover 24. The plurality of pressure relief holes 23 are evenly distributed and opened on the outer wall of the plugging cylinder 22. The pressure relief cover 24 is detachably installed on the outer wall of the pressure relief sleeve 21, and the plugging cylinder 22 is located inside the pressure relief cover 24. An energy absorption material is arranged on the inner wall of the pressure relief cover 24; When an experiment needs to be carried out, the staff can add liquid explosive into the restraint 13, and install the upper end cover 14 on the top surface of the restraint 13. The upper end cover 14 is connected to the detonator. Since the detonator is an existing mature technology, it is not shown in the figure. The liquid explosive can be detonated through the detonator, and the shock wave generated by the explosion can impact the electrical probe 15, which is then captured by the electrical probe 15 to study the shock initiation law of the liquid explosive. After the liquid explosive explodes, the pressure in the restraint 13 surges, thus impacting the plugging cylinder 22, causing the plugging cylinder 22 to slide along the annular groove at the end of the pressure relief sleeve 21, so that the pressure relief holes 23 on the outer wall of the plugging cylinder 22 are exposed. The pressure in the restraint 13 can enter the pressure relief cover 24 through the pressure relief holes 23 for release, and then be absorbed by the energy-absorbing material in the pressure relief cover 24. The working principle and connection method of the pressure relief cover 24 are both existing mature technologies, and will not be elaborated here.

[0021] The adjusting structure includes a bracket 31, a fixing rod 32, a threaded ring 33, a guiding ring 34 and an adjusting spring 35. The bracket 31 is fixedly installed at one end of the pressure relief sleeve 21 inside the pressure relief cover 24. The bracket 31 includes two thin rods and a ring body fixedly installed between the two thin rods. The fixing rod 32 is slidably installed on the inner wall of the bracket 31, and the end of the fixing rod 32 is fixedly connected to the side of the plugging cylinder 22. Threads are provided on the outer wall of the fixing rod 32 near the plugging cylinder 22. The threaded ring 33 is threadedly sleeved on the end of the fixing rod 32 near the plugging cylinder 22. Anti-slip threads are provided on the outer wall of the threaded ring 33. The guiding ring 34 is slidably sleeved on the outer wall of the fixing rod 32 through a chute and a slider, and the guiding ring 34 is rotatably connected to the threaded ring 33. The adjusting spring 35 is arranged between the guiding ring 34 and the bracket 31; Before the experiment, when experiments on liquid explosives of different equivalents are needed, the staff can adjust the adjusting spring 35. When adjusting, the pressure relief cover 24 can be removed from the end of the pressure relief sleeve 21, and then the threaded ring 33 can be rotated. Since the threaded ring 33 is screwed onto the fixing rod 32, the threaded ring 33 can slide along the fixing rod 32 when it rotates. And the guiding ring 34 is slidably connected to the fixing rod 32 through a chute and a slider and is rotatably connected to the threaded ring 33. Therefore, when the threaded ring 33 moves, it can drive the guiding ring 34 to slide, so as to adjust the compression amount of the adjusting spring 35, so as to adjust the supporting force of the adjusting spring 35 on the plugging cylinder 22 with different magnitudes, so as to correspond to the impact force when liquid explosives of different equivalents explode, ensuring that the impact during the initiation of the liquid explosive can be collected by the electrical probe 15 and timely pressure relief can be achieved to avoid danger.

[0022] The ventilation unit includes a ventilation plate 47, a plurality of ventilation openings 48, a baffle plate 49, a guiding opening 410, a top plate 411 and a positioning spring 412. The ventilation plate 47 is arranged on the inner wall of the experimental chamber 12 and is connected to the ventilation equipment. The plurality of ventilation openings 48 are linearly arrayed and opened on the side surface of the ventilation plate 47. The baffle plate 49 is slidably installed on the inner wall of the ventilation plate 47 and is adapted to the plurality of ventilation openings 48. The width of the baffle plate 49 is greater than the width of the ventilation opening 48. The guiding opening 410 is opened on the ventilation plate 47. The top plate 411 is slidably installed on the inner wall of the guiding opening 410, and the end of the top plate 411 is fixedly connected to the side surface of the baffle plate 49. The positioning spring 412 is fixedly installed between the top surface of the top plate 411 and the inner top surface of the guiding opening 410; In the initial state, under the supporting action of the positioning spring 412, the top plate 411 is located at the lower part of the guiding opening 410, and the baffle plate 49 can block the ventilation openings 48 on the ventilation plate 47. Under the action of the linkage assembly, when the top plate 411 slides upward along the guiding opening 410, it can drive the baffle plate 49 to slide, so as to expose the ventilation openings 48, enabling the ventilation equipment to communicate with the inside of the experimental chamber 12, ensuring that the inside of the experimental chamber 12 can be timely ventilated after the detonation experiment to remove the harmful gases therein, and facilitating the subsequent work of the staff.

[0023] The linkage assembly includes a fixed rack 41, a shaft rod 42, a driving gear 43, a transmission gear 44, a transmission rack 45 and a transmission rod 46. The fixed rack 41 is fixedly installed at one end of the fixed rod 32 far from the plugging cylinder 22. The shaft rod 42 is arranged through the side surface of the pressure relief cover 24. The driving gear 43 is fixedly installed at one end of the shaft rod 42 inside the pressure relief cover 24, and the driving gear 43 meshes with the fixed rack 41. The transmission gear 44 is fixedly installed at one end of the shaft rod 42 outside the pressure relief cover 24. The transmission rack 45 is slidably installed on the inner wall of the experimental chamber 12, and the transmission gear 44 meshes with the transmission rack 45. The transmission rod 46 is slidably installed on the inner wall of the experimental chamber 12. The bottom end of the transmission rod 46 is fixedly connected to the top surface of the transmission rack 45, and the top end of the transmission rod 46 is located directly below the top plate 411. A limiting structure corresponding to the transmission rod 46 is arranged on the inner wall of the experimental chamber 12; When the plugging cylinder 22 slides out of the annular groove at the end of the pressure relief sleeve 21 for pressure relief, the fixed rod 32 slides along the support 31 and can synchronously drive the fixed rack 41 to slide. The fixed rack 41 meshes with the driving gear 43, and then can drive the driving gear 43 and the shaft rod 42 to rotate. Since the transmission gear 44 at the end of the shaft rod 42 meshes with the transmission rack 45, the transmission rack 45 and the transmission rod 46 can be driven to slide upward, and when the transmission rod 46 slides upward, it drives the top plate 411 to move upward.

[0024] The limiting structure includes a fixed cylinder 51, a push rod 52, a pin block 53, a support spring 54, a pin opening 55 and two electromagnets 56. The fixed cylinder 51 is located at one side of the top end of the transmission rod 46 and is fixedly connected to the inner wall of the experimental chamber 12. The push rod 52 is slidably installed on the inner wall of the fixed cylinder 51. The pin block 53 is fixedly installed at one end of the push rod 52 located outside the fixed cylinder 51. The support spring 54 is fixedly installed between the push rod 52 and the inner wall of the fixed cylinder 51. The pin opening 55 is opened on the outer wall of the transmission rod 46. The two electromagnets 56 are respectively fixedly installed at one end of the push rod 52 located inside the fixed cylinder 51 and the inner wall of the fixed cylinder 51. When the transmission rod 46 moves upward, when the pin opening 55 on the transmission rod 46 moves to the position of the fixed cylinder 51, under the action of the support spring 54, the push rod 52 can slide along the fixed cylinder 51, thereby driving the pin block 53 into the pin opening 55 on the transmission rod 46, so that the position of the transmission rod 46 is fixed, the ventilation opening 48 can be directly in an open state, and the position of the fixed rod 32 can also be limited. Before conducting another experiment, the staff can turn on the electromagnets 56. The opposite magnetic poles of the two electromagnets 56 are opposite. Therefore, under the action of the attracting magnetic force, the push rod 52 can slide inwardly of the fixed cylinder 51 and drive the pin block 53 to move out of the pin opening 55, releasing the limit on the transmission rod 46. Under the action of the adjusting spring 35, the plugging cylinder 22 can be reset.

[0025] The monitoring component includes a fixed frame 61, a rotating shaft 62, a support rod 63, a torsion spring 64, a connecting plate 65, a top rod 66 and a monitoring sensor 67. The fixed frame 61 is located below the ventilation plate 47 and is fixedly connected to the inner wall of the experimental chamber 12. The rotating shaft 62 is rotatably installed on the inner wall of the fixed frame 61. The support rod 63 is fixedly sleeved on the outer wall of the rotating shaft 62. The torsion spring 64 is sleeved on the end of the rotating shaft 62, and the two ends of the torsion spring 64 are respectively fixedly connected to the fixed frame 61 and the rotating shaft 62. The connecting plate 65 is fixedly installed at the bottom end of the support rod 63. The top rod 66 is fixedly installed at the end of the fixed rod 32, and the end of the top rod 66 passes through the pressure relief cover 24 and is located on the side of the connecting plate 65. The monitoring sensor 67 is arranged at the top end of the support rod 63. When the fixed rod 32 slides under pressure relief, it can drive the top rod 66 to slide. When the top rod 66 slides, it can squeeze the connecting plate 65, thereby driving the connecting plate 65, the support rod 63 and the rotating shaft 62 to rotate, so that the monitoring sensor 67 at the top end of the support rod 63 rotates to directly above the pressure relief cover 24, so as to monitor the temperature and flame conditions of the pressure relief cover 24. If an abnormal situation is detected, the fire extinguishing equipment can be started in time to deal with it. The working principle and connection method of the monitoring sensor 67 are existing mature technologies and will not be elaborated here.

[0026] The specific working principle of the present invention is as follows: During use, when an experiment needs to be carried out, the staff can add liquid explosive into the restraint 13, and install the upper end cover 14 on the top surface of the restraint 13. The upper end cover 14 is connected to the detonator. Since the detonator is a mature existing technology, it is not shown in the figure. The liquid explosive can be detonated through the detonator, and the shock wave generated by the explosion can impact the electric probe 15, which is then captured by the electric probe 15 to study the shock initiation law of the liquid explosive. After the liquid explosive explodes, the pressure in the restraint 13 increases sharply, thus impacting the plugging cylinder 22, causing the plugging cylinder 22 to slide along the annular groove at the end of the pressure relief sleeve 21, so that the pressure relief holes 23 on the outer wall of the plugging cylinder 22 are exposed. The pressure in the restraint 13 can enter the pressure relief cover 24 through the pressure relief holes 23 for release, and then can be absorbed by the energy-absorbing material in the pressure relief cover 24. The working principle and connection method of the pressure relief cover 24 are both mature existing technologies and will not be elaborated here; Before the experiment, when experiments with liquid explosives of different equivalents are needed, the staff can adjust the adjusting spring 35. When adjusting, the pressure relief cover 24 can be removed from the end of the pressure relief sleeve 21, and then the threaded ring 33 can be rotated. Since the threaded ring 33 is screwed to the fixed rod 32, the threaded ring 33 can slide along the fixed rod 32 when rotating. And the guiding ring 34 is slidably connected to the fixed rod 32 through the chute and slider and is rotatably connected to the threaded ring 33. Therefore, when the threaded ring 33 moves, it can drive the guiding ring 34 to slide, so as to adjust the compression amount of the adjusting spring 35, so as to adjust the supporting force of the adjusting spring 35 on the plugging cylinder 22 of different magnitudes, so as to correspond to the impact force when liquid explosives of different equivalents explode, ensuring that the impact during the initiation of the liquid explosive can be collected by the electric probe 15 and timely pressure relief can be obtained, avoiding danger; When the plugging cylinder 22 slides out of the annular groove at the end of the pressure relief sleeve 21 for pressure relief, the fixed rod 32 sliding along the bracket 31 can synchronously drive the fixed rack 41 to slide. The fixed rack 41 meshes with the driving gear 43, and then can drive the driving gear 43 and the shaft rod 42 to rotate. Since the transmission gear 44 at the end of the shaft rod 42 meshes with the transmission rack 45, it can drive the transmission rack 45 and the transmission rod 46 to slide upward. When the transmission rod 46 slides upward, it drives the top plate 411 to move upward. In the initial state, under the supporting action of the positioning spring 412, the top plate 411 is located below the guiding port 410, and the baffle 49 can block the ventilation port 48 on the ventilation plate 47. When the top plate 411 slides upward along the guiding port 410 driven by the displacement of the transmission rod 46, it can drive the baffle 49 to slide, so that the ventilation port 48 can be exposed, enabling the ventilation equipment to communicate with the inside of the experimental chamber 12, ensuring that the inside of the experimental chamber 12 can be ventilated in time after the initiation experiment to remove the harmful gases inside, facilitating the staff to carry out subsequent work; When the transmission rod 46 moves upward, when the pin hole 55 on the transmission rod 46 moves to the position of the fixed cylinder 51, under the action of the support spring 54, the push rod 52 can slide along the fixed cylinder 51, thereby driving the pin block 53 into the pin hole 55 on the transmission rod 46, so that the position of the transmission rod 46 is fixed, the ventilation opening 48 can be directly in an open state, and the position of the fixed rod 32 can also be limited; at the same time, when the fixed rod 32 slides for pressure relief, it can drive the ejector rod 66 to slide. When the ejector rod 66 slides, it can squeeze the connecting plate 65, thereby driving the connecting plate 65, the support rod 63, and the rotating shaft 62 to rotate, so that the monitoring sensor 67 at the top of the support rod 63 rotates directly above the pressure relief cover 24 to monitor the temperature and flame conditions of the pressure relief cover 24. If an abnormal situation is detected, the fire extinguishing equipment can be started in time to deal with it. The working principle and connection method of the monitoring sensor 67 are mature existing technologies and will not be elaborated here; before conducting the experiment again, the staff can turn on the electromagnet 56. The opposite magnetic poles of the two electromagnets 56 are opposite. Therefore, under the action of the attracting magnetic force, the push rod 52 can slide inward of the fixed cylinder 51 and drive the pin block 53 to move out of the pin hole 55, releasing the limit on the transmission rod 46. Under the action of the adjusting spring 35, the plugging cylinder 22 can be reset, so that the transmission rod 46 and the ejector rod 66 are reset. After the ejector rod 66 is reset, under the action of the torsion spring 64, the support rod 63 and the monitoring sensor 67 at the top reverse and reset, away from the restraint 13 and the pressure relief cover 24 to ensure safety, and then the experiment can be carried out again.

[0027] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. Experimental device for the shock initiation law of liquid explosives, characterized in that, It includes an experimental unit, and the experimental unit includes an experimental box (11), an experimental chamber (12), a restraint (13), an upper end cover (14) and a plurality of electric probes (15). The experimental chamber (12) is opened on the side of the experimental box (11). The restraint (13) is fixedly installed on the inner wall of the experimental chamber (12). The upper end cover (14) is arranged on the top surface of the restraint (13). The plurality of electric probes (15) are symmetrically arranged on the restraint (13). A pressure relief unit is arranged on the side of the restraint (13). A linkage component, a ventilation unit and a monitoring component are arranged inside the experimental chamber (12). Among them, the pressure relief unit includes a pressure relief sleeve (21) and a plugging cylinder (22). The pressure relief sleeve (21) is arranged through the side of the restraint (13). An annular groove is opened at the end of the pressure relief sleeve (21). The plugging cylinder (22) is slidably installed on the inner wall of the annular groove. An adjusting structure is arranged on the pressure relief sleeve (21).

2. The experimental device for the impact initiation law of liquid explosives according to claim 1, characterized in that, The pressure relief unit further includes a plurality of pressure relief holes (23) and a pressure relief cover (24). The plurality of pressure relief holes (23) are evenly distributed and opened on the outer wall of the plugging cylinder (22). The pressure relief cover (24) is detachably installed on the outer wall of the pressure relief sleeve (21), and the plugging cylinder (22) is located inside the pressure relief cover (24).

3. The experimental device for the impact initiation law of liquid explosives according to claim 2, characterized in that, An energy absorption material is arranged on the inner wall of the pressure relief cover (24). The outer wall of the plugging cylinder (22) fits with the inner wall of the annular groove.

4. The experimental device for the impact initiation law of liquid explosives according to claim 2, characterized in that, The adjusting structure includes a bracket (31), a fixing rod (32), a threaded ring (33), a guiding ring (34) and an adjusting spring (35). The bracket (31) is fixedly installed at one end of the pressure relief sleeve (21) inside the pressure relief cover (24). The bracket (31) includes two thin rods and a ring body fixedly installed between the two thin rods. The fixing rod (32) is slidably installed on the inner wall of the bracket (31), and the end of the fixing rod (32) is fixedly connected to the side of the plugging cylinder (22). The threaded ring (33) is threadedly sleeved on one end of the fixing rod (32) close to the plugging cylinder (22). The guiding ring (34) is slidably sleeved on the outer wall of the fixing rod (32) through a chute and a slider, and the guiding ring (34) is rotatably connected to the threaded ring (33). The adjusting spring (35) is arranged between the guiding ring (34) and the bracket (31).

5. The experimental device for the shock initiation law of liquid explosives according to claim 4, characterized in that Threads are arranged on the outer wall of one end of the fixing rod (32) close to the plugging cylinder (22). Anti-slip lines are arranged on the outer wall of the threaded ring (33).

6. The experimental device for the impact initiation law of liquid explosives according to claim 4, characterized in that, The ventilation unit includes a ventilation plate (47), a plurality of ventilation openings (48), a baffle plate (49), a guiding opening (410), a top plate (411) and a positioning spring (412). The ventilation plate (47) is arranged on the inner wall of the experimental chamber (12). The plurality of ventilation openings (48) are linearly arrayed and opened on the side surface of the ventilation plate (47). The baffle plate (49) is slidably installed on the inner wall of the ventilation plate (47), and the baffle plate (49) is adapted to the plurality of ventilation openings (48). The guiding opening (410) is opened on the ventilation plate (47). The top plate (411) is slidably installed on the inner wall of the guiding opening (410), and the end of the top plate (411) is fixedly connected to the side surface of the baffle plate (49). The positioning spring (412) is fixedly installed between the top surface of the top plate (411) and the inner top surface of the guiding opening (410).

7. The experimental device for the shock initiation law of liquid explosives according to claim 6, characterized in that, The ventilation plate (47) is connected to the ventilation equipment. The width of the baffle plate (49) is greater than the width of the ventilation opening (48).

8. The experimental device for the shock initiation law of liquid explosives according to claim 6, characterized in that, The linkage assembly includes a fixed rack (41), a shaft rod (42), a driving gear (43), a transmission gear (44), a transmission rack (45) and a transmission rod (46). The fixed rack (41) is fixedly installed at one end of the fixed rod (32) away from the plugging cylinder (22). The shaft rod (42) penetrates through the side surface of the pressure relief cover (24). The driving gear (43) is fixedly installed at one end of the shaft rod (42) inside the pressure relief cover (24), and the driving gear (43) meshes with the fixed rack (41). The transmission gear (44) is fixedly installed at one end of the shaft rod (42) outside the pressure relief cover (24). The transmission rack (45) is slidably installed on the inner wall of the experimental chamber (12), and the transmission gear (44) meshes with the transmission rack (45). The transmission rod (46) is slidably installed on the inner wall of the experimental chamber (12). The bottom end of the transmission rod (46) is fixedly connected to the top surface of the transmission rack (45), and the top end of the transmission rod (46) is located directly below the top plate (411). A limiting structure corresponding to the transmission rod (46) is arranged on the inner wall of the experimental chamber (12).

9. The experimental device for the impact initiation law of liquid explosives according to claim 8, characterized in that, The limiting structure includes a fixed cylinder (51), a push rod (52), a pin block (53), a support spring (54), a pin opening (55) and two electromagnets (56). The fixed cylinder (51) is located at one side of the top end of the transmission rod (46) and is fixedly connected to the inner wall of the experimental chamber (12). The push rod (52) is slidably installed on the inner wall of the fixed cylinder (51). The pin block (53) is fixedly installed at one end of the push rod (52) outside the fixed cylinder (51). The support spring (54) is fixedly installed between the push rod (52) and the inner wall of the fixed cylinder (51). The pin opening (55) is opened on the outer wall of the transmission rod (46). The two electromagnets (56) are respectively fixedly installed at one end of the push rod (52) inside the fixed cylinder (51) and the inner wall of the fixed cylinder (51).

10. The experimental device for the shock initiation law of liquid explosives according to claim 4, characterized in that, The monitoring component includes a fixed frame (61), a rotating shaft (62), a support rod (63), a torsion spring (64), a connecting plate (65), a top rod (66) and a monitoring sensor (67). The fixed frame (61) is located below the ventilation plate (47) and fixedly connected to the inner wall of the experimental chamber (12). The rotating shaft (62) is rotatably installed on the inner wall of the fixed frame (61). The support rod (63) is fixedly sleeved on the outer wall of the rotating shaft (62). The torsion spring (64) is sleeved on the end of the rotating shaft (62), and the two ends of the torsion spring (64) are respectively fixedly connected to the fixed frame (61) and the rotating shaft (62). The connecting plate (65) is fixedly installed at the bottom end of the support rod (63). The top rod (66) is fixedly installed at the end of the fixed rod (32), and the end of the top rod (66) passes through the pressure relief cover (24) and is located on the side of the connecting plate (65). The monitoring sensor (67) is arranged at the top end of the support rod (63).

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