Experimental device for studying the shock initiation law of liquid explosives

Abstract

The present invention relates to the field of liquid explosives experimental technology, and discloses an experimental device for the impact detonation law of liquid explosives, including an experimental unit, wherein the experimental unit includes an experimental box, an experimental chamber, a restraint, an upper end cover and a plurality of electric probes, wherein 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, and the plurality of electric probes are symmetrically arranged on the two sides of the restraint, and a pressure relief unit is arranged on the side of the restraint. The present invention is designed by adjusting the spring preload, and the device can flexibly match the impact force generated by the explosion of explosives of different equivalents, ensuring that the sealing tube accurately opens the pressure relief channel within the pressure threshold, avoiding the response lag problem of the traditional fixed pressure relief structure, effectively preventing the restraint from being damaged by overpressure, and reducing the risk of secondary reactions, providing reliable safety protection for extreme working condition experiments.

Description

Technical Field

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

[0002] Liquid explosives are explosive substances that are liquid at room temperature and typically consist of an oxidizer, fuel, and other additives. Due to their unique physical state, these explosives offer advantages in specific applications, such as being able to be transported through pipelines and filling irregularly shaped spaces. However, due to their high energy density and potential hazards, their handling and use require extreme caution and adherence to strict safety regulations.

[0003] A search revealed that Chinese patent publication number CN219810792U discloses an experimental device for studying the shock initiation and detonation growth of liquid explosives. The device confines a liquid charge within a restrainer and uses an electrical probe array to record the arrival times of the detonation wave (shock wave) at different locations within the tested liquid explosive, providing data support for studying the shock initiation performance of the liquid explosive. However, this solution still has the following shortcomings in actual use:

[0004] When conducting scientific research on the initiation laws of liquid explosives, in order to ensure that the experimental data has universal applicability 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-mentioned experimental device is confined to the interior of the confinement device. Although this design can effectively control the diffusion direction of the initial detonation waveform, at the moment when the high-yield explosive releases huge energy, the pressure in the inner cavity of the confinement device will rise sharply to hundreds of MPa within microseconds. If the pressure relief device only relies on a fixed-size discharge channel, it is often difficult to dynamically match the pressure peaks corresponding to explosives of different equivalents, resulting in the pressure relief response seriously lagging behind the actual pressure growth rate. This timing misalignment will not only cause the confinement device to bear instantaneous loads far exceeding the yield strength of the material, causing plastic deformation or even brittle fracture of the device wall, but may also cause residual high-temperature and high-pressure gas to react with unreacted explosives due to incomplete pressure relief, further exacerbating the risk of structural failure.

[0005] 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

[0006] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an experimental device for the impact initiation law of liquid explosives.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] An experimental device for the impact initiation law of liquid explosives includes an experimental unit, which includes an experimental box, an experimental chamber, a restraint, an upper end cover, and several 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 set on the top surface of the restraint, and several electric probes are symmetrically arranged on the restraint. A pressure relief unit is set on the side of the restraint, and a linkage component, a ventilation unit, and a monitoring component are set inside the experimental chamber.

[0009] Among them, the pressure relief unit includes a pressure relief sleeve and a sealing tube. The pressure relief sleeve is arranged through the side of the restraint. An annular groove is opened at the end of the pressure relief sleeve. The sealing tube is slidably installed on the inner wall of the annular groove. An adjustment structure is provided on the pressure relief sleeve.

[0010] As a preferred technical solution of the present invention, the pressure relief unit also 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 sealing cylinder. The pressure relief cover is detachably installed on the outer wall of the pressure relief sleeve, and the sealing cylinder is located on the inner side of the pressure relief cover.

[0011] As a preferred technical solution of the present invention, the inner wall of the pressure relief hood is provided with energy-absorbing material, and the outer wall of the sealing cylinder is in contact with the inner wall of the annular groove.

[0012] As a preferred technical solution of the present invention, the adjustment structure includes a bracket, a fixed rod, a threaded ring, a guide ring and an adjustment spring. The bracket is fixedly installed on one end of the pressure relief sleeve located on the inner side of the pressure relief cover. The bracket includes two thin rods and a ring body fixedly installed between the two thin rods. The fixed rod is slidably installed on the inner wall of the bracket, and the end of the fixed rod is fixedly connected to the side of the sealing tube. The threaded ring is threadedly mounted on the end of the fixed rod close to the sealing tube. The guide ring is slidably mounted on the outer wall of the fixed rod through a sliding groove and a slider, and the guide ring is rotatably connected to the threaded ring. The adjustment spring is arranged between the guide ring and the bracket.

[0013] As a preferred technical solution of the present invention, the outer wall of one end of the fixing rod close to the sealing tube is provided with a thread, and the outer wall of the threaded ring is provided with anti-slip grooves.

[0014] As a preferred technical solution of the present invention, the ventilation unit includes a ventilation plate, several ventilation ports, a baffle, a guide port, a top plate and a positioning spring. The ventilation plate is arranged on the inner wall of the experimental chamber, and several ventilation ports are distributed in a linear array 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 several ventilation ports. The guide port is opened on the ventilation plate, the top plate is slidably installed on the inner wall of the guide port, 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 guide port.

[0015] 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.

[0016] As an optimal technical solution of the present invention, the linkage assembly includes a fixed rack, a shaft, a driving gear, a transmission gear, a transmission rack and a transmission rod. The fixed rack is fixedly mounted on the end of the fixed rod away from the sealing cylinder, the shaft is penetrated and arranged on the side of the pressure relief cover, the driving gear is fixedly mounted on the end of the shaft located on the inner side of the pressure relief cover, and the driving gear is meshed with the fixed rack, the transmission gear is fixedly mounted on the end of the shaft located on the outer side of the pressure relief cover, the transmission rack is slidably mounted on the inner wall of the experimental chamber, and the transmission gear is meshed with the transmission rack, the transmission rod is slidably mounted 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, and the inner wall of the experimental chamber is provided with a limiting structure corresponding to the transmission rod.

[0017] 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 mouth 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 on the inner wall of the fixed cylinder, the pin block is fixedly installed on the end of the push rod located on the outside of the fixed cylinder, the support spring is fixedly installed between the push rod and the inner wall of the fixed cylinder, the pin mouth is opened on the outer wall of the transmission rod, and the two electromagnets are respectively fixedly installed on the end of the push rod located on the inside of the fixed cylinder and the inner wall of the fixed cylinder.

[0018] 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 push 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 on the inner wall of 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 on the bottom end of the support rod, the push rod is fixedly installed on the end of the fixed rod, and the end of the push 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 of the support rod.

[0019] The present invention has the following beneficial effects:

[0020] 1. By setting up a pressure relief sleeve and a pressure relief cover, and adjusting the spring preload design, the device can flexibly match the impact force generated by the explosion of explosives of different equivalents, ensuring that the blocking tube accurately opens the pressure relief channel within the pressure threshold, avoiding the response lag problem of traditional fixed pressure relief structures, effectively preventing the restraint from being damaged by overpressure, and reducing the risk of secondary reactions, providing reliable safety protection for extreme working condition experiments;

[0021] 2. By installing ventilation panels and monitoring sensors, when the explosion shock wave triggers the pressure relief mechanism, the rack and pinion transmission assembly automatically opens the ventilation channel, cooperating with external ventilation equipment to achieve rapid air purification. At the same time, the monitoring sensor, driven by the connecting rod mechanism, is precisely positioned above the pressure relief cover, sensing temperature and flame anomalies in real time and linking the fire extinguishing system. This fully automated "trigger-response-reset" process not only shortens post-experiment processing time, but also, through the synergy of sensors and fire extinguishing equipment, controls the response time to sudden emergencies to milliseconds, significantly reducing the risk of manual operation and the experimental interval period.

[0022] 3. By setting up the electromagnet and the transmission rod, after the experiment, you only need to power on the electromagnet to activate it, and the push rod will release the mechanical lock on the transmission rod. Under the action of the pre-tightened spring, all moving parts will automatically reset to their initial positions, completely eliminating the tedious operation of traditional reset, reducing the experimental preparation time and speeding up the progress of the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of the experimental device for the impact initiation law of liquid explosives proposed in the present invention;

[0024] Figure 2 This is a schematic diagram of a partial cross-section of the experimental box of the experimental device for the impact initiation law of liquid explosives proposed in the present invention;

[0025] Figure 3 This is a schematic diagram of the experimental chamber structure of the experimental device for the impact initiation law of liquid explosives proposed in the present invention;

[0026] Figure 4 for Figure 3 A in the middle is an enlarged structural diagram;

[0027] Figure 5 This is a schematic diagram of the exploded structure of the pressure relief sleeve and pressure relief cover of the experimental device for the impact detonation law of liquid explosives proposed in the present invention;

[0028] Figure 6 This is a schematic diagram of the sealing tube structure of the experimental device for the impact detonation law of liquid explosives proposed in the present invention;

[0029] Figure 7 This is a schematic diagram of the ventilation plate structure of the experimental device for the impact initiation law of liquid explosives proposed in the present invention;

[0030] Figure 8 This is a schematic diagram of a partial cross-section of the fixed tube of the experimental device for the impact detonation law of liquid explosives proposed in the present invention;

[0031] Figure 9 A schematic diagram of the support rod structure of the experimental device for the impact detonation law of liquid explosives proposed in the present invention;

[0032] Figure 10 for Figure 9 Enlarged structural diagram at point B in the middle.

[0033] In the figure: 11, experimental box; 12, experimental chamber; 13, restraint; 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, fixing rod; 33, threaded ring; 34, guide ring; 35, adjustment spring; 41, fixing rack; 42, shaft; 43, driving gear; 44, transmission gear; 45, transmission rack ; 46. Transmission rod; 47. Ventilation plate; 48. Ventilation port; 49. Baffle; 410. Guide port; 411. Top plate; 412. Positioning spring; 51. Fixing cylinder; 52. Push rod; 53. Pin block; 54. Support spring; 55. Pin port; 56. Electromagnet; 61. Fixing frame; 62. Rotating shaft; 63. Support rod; 64. Torsion spring; 65. Connecting plate; 66. Top rod; 67. Monitoring sensor. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] Reference Figure 1-10 , an experimental device for the impact initiation law of liquid explosives, including an experimental unit, the experimental unit including 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, a 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, and a linkage component, a ventilation unit and a monitoring component are arranged inside the experimental chamber 12;

[0036] The pressure relief unit includes a pressure relief sleeve 21 and a blocking cylinder 22. The pressure relief sleeve 21 is arranged on the side of the restrainer 13. An annular groove is provided at the end of the pressure relief sleeve 21. The blocking cylinder 22 is slidably mounted on the inner wall of the annular groove. The outer wall of the blocking cylinder 22 fits the inner wall of the annular groove. The pressure relief sleeve 21 is provided with an adjustment structure.

[0037] 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 are opened on the outer wall of the blocking tube 22. The pressure relief cover 24 is detachably mounted on the outer wall of the pressure relief sleeve 21, and the blocking tube 22 is located on the inner side of the pressure relief cover 24. The inner wall of the pressure relief cover 24 is provided with energy-absorbing material.

[0038] When experiments are needed, the staff can add liquid explosives into the restraint 13 and install the upper end cover 14 to the top surface of the restraint 13. The upper end cover 14 is connected to the detonator. The detonator is an existing mature technology and is therefore not shown in the figure. The liquid explosive can be detonated by the detonator, and the shock wave generated by the explosion can impact the electric probe 15, thereby being captured by the electric probe 15, so as to study the impact detonation law of the liquid explosive. After the liquid explosive explodes, the pressure in the restraint 13 increases sharply, thereby impacting the sealing tube 22, so that the sealing tube 22 can slide along the annular groove at the end of the pressure relief sleeve 21, thereby exposing the pressure relief hole 23 on the outer wall of the sealing tube 22, and the pressure in the restraint 13 can enter the pressure relief cover 24 through the pressure relief hole 23 to be released, so that it 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 existing mature technologies and will not be elaborated here.

[0039] The adjustment structure includes a bracket 31, a fixing rod 32, a threaded ring 33, a guide ring 34 and an adjusting spring 35. The bracket 31 is fixedly mounted on one end of the pressure relief sleeve 21 located on the inner side of the pressure relief cover 24. The bracket 31 includes two thin rods and a ring body fixedly mounted between the two thin rods. The fixing rod 32 is slidably mounted on the inner wall of the bracket 31, and the end of the fixing rod 32 is fixedly connected to the side of the blocking tube 22. The outer wall of the fixing rod 32 near the blocking tube 22 is provided with a thread. The threaded ring 33 is threadedly fitted on the end of the fixing rod 32 near the blocking tube 22. The outer wall of the threaded ring 33 is provided with anti-slip grooves. The guide ring 34 is slidably fitted on the outer wall of the fixing rod 32 through a sliding groove and a slider, and the guide ring 34 is rotatably connected to the threaded ring 33. The adjusting spring 35 is arranged between the guide ring 34 and the bracket 31.

[0040] Before conducting the experiment, if it is necessary to experiment with liquid explosives of different equivalents, the staff can adjust the adjusting spring 35. During the adjustment, 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 it rotates, and the guide ring 34 is slidably connected to the fixed rod 32 through the sliding groove and the slider and is rotatably connected to the threaded ring 33. Therefore, when the threaded ring 33 moves, it can drive the guide ring 34 to slide, thereby realizing the adjustment of the compression amount of the adjusting spring 35, so that the adjusting spring 35 can adjust the supporting force of the sealing tube 22 to different sizes, so as to correspond to the impact force when liquid explosives of different equivalents explode, ensuring that the impact when the liquid explosive is detonated can be collected by the electric probe 15 and can be timely depressurized to avoid danger.

[0041] The ventilation unit includes a ventilation plate 47, a plurality of ventilation openings 48, a baffle 49, a guide 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 the ventilation plate 47 is connected to the ventilation equipment. A plurality of ventilation openings 48 are distributed in a linear array and opened on the side of the ventilation plate 47. The baffle 49 is slidably installed on the inner wall of the ventilation plate 47, and the baffle 49 is adapted to the plurality of ventilation openings 48. The width of the baffle 49 is greater than the width of the ventilation opening 48. The guide opening 410 is opened on the ventilation plate 47, and the top plate 411 is slidably installed on the inner wall of the guide opening 410, and the end of the top plate 411 is fixedly connected to the side of the baffle 49. The positioning spring 412 is fixedly installed between the top surface of the top plate 411 and the inner top surface of the guide opening 410;

[0042] In the initial state, the top plate 411 is located at the lower part of the guide port 410 under the support of the positioning spring 412, and the baffle 49 can block the vent 48 on the ventilation plate 47. Under the action of the linkage component, the top plate 411 can drive the baffle 49 to slide when sliding upward along the guide port 410, thereby exposing the vent 48, so that the ventilation equipment can be connected to the interior of the experimental chamber 12, ensuring that the experimental chamber 12 can be ventilated in time after the detonation experiment, so as to remove the harmful gases therein and facilitate the staff to carry out subsequent work.

[0043] The linkage assembly includes a fixed rack 41, a shaft 42, a driving gear 43, a transmission gear 44, a transmission rack 45 and a transmission rod 46. The fixed rack 41 is fixedly mounted on the end of the fixed rod 32 away from the sealing cylinder 22, the shaft 42 is penetrated and arranged on the side of the pressure relief cover 24, the driving gear 43 is fixedly mounted on the end of the shaft 42 located on the inner side of the pressure relief cover 24, and the driving gear 43 is meshed with the fixed rack 41, and the transmission gear 44 is fixedly mounted on the end of the shaft 42 located on the outer side of the pressure relief cover 24. The transmission rack 45 is slidably mounted on the inner wall of the experimental chamber 12, and the transmission gear 44 is meshed with the transmission rack 45, and the transmission rod 46 is slidably mounted 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, and the inner wall of the experimental chamber 12 is provided with a limiting structure corresponding to the transmission rod 46;

[0044] When the sealing tube 22 slides out of the annular groove at the end of the pressure relief sleeve 21 to relieve pressure, the fixed rod 32 slides along the bracket 31 and can synchronously drive the fixed rack 41 to slide. The fixed rack 41 is engaged with the driving gear 43, and can thereby drive the driving gear 43 and the shaft 42 to rotate. Since the transmission gear 44 at the end of the shaft 42 is engaged 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.

[0045] The limiting structure includes a fixed cylinder 51, a push rod 52, a pin block 53, a support spring 54, a pin hole 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 mounted on the inner wall of the fixed cylinder 51. The pin block 53 is fixedly mounted on one end of the push rod 52 located outside the fixed cylinder 51. The support spring 54 is fixedly mounted between the push rod 52 and the inner wall of the fixed cylinder 51. The pin hole 55 is opened on the outer wall of the transmission rod 46. The two electromagnets 56 are respectively fixedly mounted on one end of the push rod 52 located inside the fixed cylinder 51 and the inner wall of the fixed cylinder 51;

[0046] 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 to enter the pin hole 55 on the transmission rod 46, so that the position of the transmission rod 46 is fixed, the vent 48 can be directly in the open state, and the position of the fixed rod 32 can also be limited. Before conducting another experiment, the staff can turn on the electromagnet 56. The relative magnetic poles of the two electromagnets 56 are opposite. Therefore, under the action of the attractive magnetic force, the push rod 52 can slide toward the inside of the fixed cylinder 51 and drive the pin block 53 to move out of the pin hole 55, thereby releasing the limit on the transmission rod 46. Under the action of the adjusting spring 35, the blocking cylinder 22 can be reset.

[0047] The monitoring assembly includes a fixing frame 61, a rotating shaft 62, a support rod 63, a torsion spring 64, a connecting plate 65, a push rod 66 and a monitoring sensor 67. The fixing 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 mounted on the inner wall of the fixing 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 fixing frame 61 and the rotating shaft 62. The connecting plate 65 is fixedly mounted on the bottom end of the support rod 63. The push rod 66 is fixedly mounted on the end of the fixed rod 32, and the end of the push 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 of the support rod 63;

[0048] When the fixed rod 32 slides to relieve pressure, it can drive the push rod 66 to slide. When the push 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 to the top of 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 activated in time to respond. The working principle and connection method of the monitoring sensor 67 are existing mature technologies and will not be elaborated on here.

[0049] The specific working principle of the present invention is as follows:

[0050] During use, when experiments are needed, the staff can add liquid explosives into the restraint 13 and install the upper end cover 14 to the top surface of the restraint 13. The upper end cover 14 is connected to the detonator. The detonator is an existing mature technology, so it is not shown in the figure. The liquid explosive can be detonated by the detonator, and the shock wave generated by the explosion can impact the electric probe 15, which is captured by the electric probe 15, so as to study the impact detonation law of the liquid explosive. After the liquid explosive explodes, the pressure in the restraint 13 increases sharply, which will impact the blocking tube 22, so that the blocking tube 22 can slide along the annular groove at the end of the pressure relief sleeve 21, thereby exposing the pressure relief hole 23 on the outer wall of the blocking tube 22, and the pressure in the restraint 13 can enter the pressure relief cover 24 through the pressure relief hole 23 to be released, so that it 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 existing mature technologies and will not be described in detail here.

[0051] The screw threaded ring 33 is screwed to the fixing rod 32, so that the screw threaded ring 33 can slide along the fixing rod 32 when it is rotated. The guide ring 34 is slidably connected to the fixing rod 32 through the sliding groove and the slider and is rotatably connected to the screw threaded ring 33. Therefore, when the screw threaded ring 33 moves, the guide ring 34 can be driven to slide, thereby adjusting the compression amount of the adjusting spring 35, so that the adjusting spring 35 can adjust the supporting force of the blocking tube 22 to different sizes, thereby corresponding to the impact force when the liquid explosives of different equivalents explode, ensuring that the impact of the liquid explosives when detonated can be collected by the electric probe 15 and can be relieved in time to avoid danger.

[0052] When the sealing tube 22 slides out of the annular groove at the end of the pressure relief sleeve 21 to relieve pressure, the fixed rod 32 slides along the bracket 31 and can synchronously drive the fixed rack 41 to slide. The fixed rack 41 is engaged with the driving gear 43, and then the driving gear 43 and the shaft 42 are driven to rotate. Since the transmission gear 44 at the end of the shaft 42 is engaged with the transmission rack 45, the transmission rack 45 and the transmission rod 46 are driven to slide upward. When the transmission rod 46 slides upward, it drives the top plate 411 to move upward. In the initial state, in the positioning Under the support of the spring 412, the top plate 411 is located at the lower part of the guide opening 410, and the baffle 49 can block the vent 48 on the ventilation plate 47. The displacement of the transmission rod 46 allows the top plate 411 to slide upward along the guide opening 410, which can drive the baffle 49 to slide, thereby exposing the vent 48, allowing the ventilation equipment to be connected to the interior of the experimental chamber 12, ensuring that the experimental chamber 12 can be ventilated in time after the detonation experiment, so as to remove the harmful gases therein and facilitate the staff to carry out subsequent work;

[0053] 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 to enter the pin hole 55 on the transmission rod 46, so that the position of the transmission rod 46 is fixed, the vent 48 can be directly in the open state, and the position of the fixed rod 32 can also be limited; at the same time, when the fixed rod 32 slides to relieve pressure, it can drive the push rod 66 to slide, and when the push 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 to the top of 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 activated in time to respond. The working principle and connection method of the monitoring sensor 67 are existing mature technologies and will not be elaborated on here. Before conducting the experiment again, the staff can turn on the electromagnet 56. The relative magnetic poles of the two electromagnets 56 are opposite. Therefore, under the action of the attractive magnetic force, the push rod 52 can slide toward the inner side of the fixed cylinder 51, and drive the pin block 53 to move out of the pin mouth 55, releasing the limit on the transmission rod 46. Under the action of the adjusting spring 35, the sealing cylinder 22 can be reset, so that the transmission rod 46 and the push rod 66 are reset. After the push rod 66 is reset, the support rod 63 and the monitoring sensor 67 at the top are reversed and reset under the action of the torsion spring 64, away from the restraint 13 and the pressure relief cover 24 to ensure safety, and the experiment can be carried out again.

[0054] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An experimental device for the impact detonation law of liquid explosives, characterized in that: The experimental unit comprises an experimental box (11), an experimental chamber (12), a restrainer (13), an upper end cover (14) and a plurality of electric probes (15), wherein the experimental chamber (12) is opened on the side of the experimental box (11), the restrainer (13) is fixedly mounted on the inner wall of the experimental chamber (12), the upper end cover (14) is arranged on the top surface of the restrainer (13), a plurality of electric probes (15) are symmetrically arranged on the restrainer (13), a pressure relief unit is arranged on the side of the restrainer (13), and a linkage component, a ventilation unit and a monitoring component are arranged inside the experimental chamber (12); The pressure relief unit comprises a pressure relief sleeve (21) and a sealing cylinder (22); the pressure relief sleeve (21) is arranged through the side of the restrainer (13); an annular groove is provided at the end of the pressure relief sleeve (21); the sealing cylinder (22) is slidably mounted on the inner wall of the annular groove; and an adjustment structure is provided on the pressure relief sleeve (21); The adjustment structure includes a bracket (31), a fixed rod (32), a threaded ring (33), a guide ring (34) and an adjustment spring (35), wherein the bracket (31) is fixedly mounted on one end of the pressure relief sleeve (21) located on the inner side of the pressure relief cover (24), the bracket (31) includes two thin rods and a ring body fixedly mounted between the two thin rods, the fixed rod (32) is slidably mounted on the inner wall of the bracket (31), and the end of the fixed rod (32) is fixedly connected to the side of the blocking tube (22), the threaded ring (33) is threadedly sleeved on one end of the fixed rod (32) close to the blocking tube (22), the guide ring (34) is slidably sleeved on the outer wall of the fixed rod (32) through a sliding groove and a slider, and the guide ring (34) is rotatably connected to the threaded ring (33), and the adjustment spring (35) is arranged between the guide ring (34) and the bracket (31); The ventilation unit comprises a ventilation plate (47), a plurality of ventilation openings (48), a baffle (49), a guide opening (410), a top plate (411) and a positioning spring (412), wherein the ventilation plate (47) is arranged on the inner wall of the experimental chamber (12), a plurality of ventilation openings (48) are distributed in a linear array and are opened on the side of the ventilation plate (47), the baffle (49) is slidably mounted on the inner wall of the ventilation plate (47), and the baffle (49) is adapted to the plurality of ventilation openings (48), the guide opening (410) is opened on the ventilation plate (47), the top plate (411) is slidably mounted on the inner wall of the guide opening (410), and the end of the top plate (411) is fixedly connected to the side of the baffle (49), and the positioning spring (412) is fixedly mounted between the top surface of the top plate (411) and the inner top surface of the guide opening (410); The linkage assembly includes a fixed rack (41), a shaft (42), a driving gear (43), a transmission gear (44), a transmission rack (45) and a transmission rod (46), wherein the fixed rack (41) is fixedly mounted on an end of the fixed rod (32) away from the blocking tube (22), the shaft (42) is arranged through the side of the pressure relief cover (24), the driving gear (43) is fixedly mounted on an end of the shaft (42) located inside the pressure relief cover (24), and the driving gear (43) is meshed with the fixed rack (41), and the transmission gear (44) is fixedly mounted on the fixed rack (41). The transmission rack (45) is fixedly mounted on the end of the shaft (42) outside the pressure relief cover (24), and the transmission gear (44) is meshed with the transmission rack (45). The transmission rod (46) is slidably mounted 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). The inner wall of the experimental chamber (12) is provided with a limiting structure corresponding to the transmission rod (46).

2. The experimental device for the impact detonation law of liquid explosives according to claim 1, characterized in that: The pressure relief unit further comprises a plurality of pressure relief holes (23) and a pressure relief cover (24), wherein the plurality of pressure relief holes (23) are evenly distributed and are opened on the outer wall of the sealing cylinder (22), the pressure relief cover (24) is detachably mounted on the outer wall of the pressure relief sleeve (21), and the sealing cylinder (22) is located on the inner side of the pressure relief cover (24).

3. The experimental device for the impact detonation law of liquid explosives according to claim 2, characterized in that: The inner wall of the pressure relief cover (24) is provided with energy-absorbing material, and the outer wall of the blocking cylinder (22) is in contact with the inner wall of the annular groove.

4. The experimental device for the impact detonation law of liquid explosives according to claim 1, characterized in that: The outer wall of one end of the fixing rod (32) close to the blocking cylinder (22) is provided with a thread, and the outer wall of the threaded ring (33) is provided with anti-slip grooves.

5. The experimental device for the impact detonation law of liquid explosives according to claim 1, characterized in that: The ventilation plate (47) is connected to the ventilation equipment, and the width of the baffle (49) is greater than the width of the ventilation opening (48).

6. The experimental device for the impact detonation law of liquid explosives according to claim 1, 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 a position on 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 mounted on the inner wall of the fixed cylinder (51). The pin block (53) is fixedly mounted on one end of the push rod (52) located outside the fixed cylinder (51). The support spring (54) is fixedly mounted 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 mounted on one end of the push rod (52) located inside the fixed cylinder (51) and the inner wall of the fixed cylinder (51).

7. The experimental device for the impact detonation law of liquid explosives according to claim 1, characterized in that: The monitoring assembly includes a fixed frame (61), a rotating shaft (62), a support rod (63), a torsion spring (64), a connecting plate (65), a push 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 mounted 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 mounted on the bottom end of the support rod (63). The push rod (66) is fixedly mounted on the end of the fixed rod (32), and the end of the push 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 on the top of the support rod (63).

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