Knock injury simulation experiment device

Abstract

The invention relates to the technical field of animal experiment instruments, in particular to a detonation injury simulation experiment device, which controls the displacement of a telescopic cylinder through a pressurizing mechanism, and controls the length of the telescopic cylinder through a telescopic mechanism, so that in the process that the pressurizing mechanism continuously pressurizes the inside of a sealed cavity, the detonation injury can be simulated. After the telescopic cylinder body sleeves the sealing mechanism to move for a specified distance, the telescopic cylinder body is separated from the sealing mechanism, and the sealing baffle plate is popped out, so that the gas with specified pressure is released, and the effect of controlling the gas flow with specified pressure to perform knocking impact simulation on animals is achieved. According to the experimental device, knocking impact simulation conditions in fixed spaces with different sizes are realized by arranging different pressurizing structures; meanwhile, structures such as a water tank and a pressure relief hole are arranged, so that the knocking impact condition when air or water is used as a medium can be simulated; in addition, by setting different rotation directions of the stainless steel mesh, the knocking impact conditions under different body positions and states can be simulated.

Description

Technical Field

[0001] The invention relates to the technical field of animal experimental instruments, and in particular to a blast injury simulation experimental device. Background Art

[0002] There are two main ways that explosive weapons can cause injuries. One is that the fragments produced by the explosion directly act on the human body and cause injuries. The other is that the explosive weapon instantly releases huge energy, causing the pressure and temperature at the center of the explosion to increase sharply, thus forming a supersonic high-pressure wave that acts on the human body and causes injuries, namely shock wave injuries. The injuries caused by the shock wave directly acting on the human body are called blast injuries. Blast injuries are not traditional penetrating injuries, but they have a high mortality rate. Because the shock wave covers a wide range, a large number of casualties will be generated instantly. However, under battlefield conditions, medical treatment resources will be relatively scarce, and it is impossible to treat everyone. Therefore, it is very necessary to diagnose blast injuries early, grade the severity, judge the degree of treatment intervention, and classify and treat them according to the results.

[0003] In order to study the effects of shock waves of different intensities on different organs, a blast injury model is usually established in experimental animals, and a specific device is used to generate an environment simulating an explosion shock wave. In the prior art, the basic structure of the established blast injury model mainly includes two parts, one part is used to instantly release the specified pressure gas, and the other part is to fix the experimental animal. For example, a Chinese utility model patent (CN213607121U) discloses an animal blast injury experimental device, which is provided with a gas cylinder and a pressurized cylinder, the gas outlet of the gas cylinder is connected to the air duct of the pressurized cylinder, and the gas cylinder is used to provide high-pressure gas to the pressurized cylinder. The gas outlet of the pressurized cylinder is sealed with a membrane through a flange connection, and an animal bed for fixing the animal is provided above the gas outlet of the pressurized cylinder. When the gas pressure in the pressurized cylinder reaches a certain value, the membrane will rupture, causing the high-pressure gas to be released instantly, and the shock wave will impact the animal, thereby achieving the effect of blast injury simulation. Another example is a new type of animal impact injury experimental device disclosed in a Chinese utility model patent (CN205459178U). The experimental device pressurizes the inside of a pressurized cylinder through a pressure pump, installs an aluminum sheet at the air outlet of the pressurized cylinder, and installs an anti-fall net for fixing animals at the top of the air outlet of the pressurized cylinder. When the pressure in the pressurized cylinder reaches a certain value, the aluminum sheet breaks, allowing the high-pressure gas to be released instantly, thereby achieving impact on the animal.

[0004] Although both of the above two devices can simulate blast injuries through animals, the way they release high-pressure airflow is to break the aluminum sheet or membrane when it cannot withstand the pressure. Therefore, when repeating the experiment, it is necessary to repeatedly install new aluminum sheets or membranes, which is inconvenient to operate and increases the cost of the experiment. Secondly, even if the aluminum sheet or membrane is made of the same model, there will still be certain accidental errors, resulting in the pressure released in each experiment not being exactly the same. In addition, when releasing high-pressure gas in the above manner, it is impossible to set the released high-pressure airflow to a specified value. Therefore, in response to the above technical problems, the applicant has invented a blast injury simulation experimental device that can accurately control the size of the shock wave and does not require frequent replacement of sealing sheets. Summary of the invention

[0005] The purpose of the present invention is to provide a blast injury simulation experimental device, which can accurately release shock waves of specified pressure and does not require frequent replacement of sealing devices; in addition, the device can also simulate blast injury conditions with air and water as the medium.

[0006] The above-mentioned purpose of the present invention is achieved like this:

[0007] A blast injury simulation experiment device, comprising a sealed chamber and an experimental chamber, wherein a connecting pipe 1 is installed between the sealed chamber and the experimental chamber to connect the sealed chamber and the experimental chamber; a pressurizing mechanism is arranged in the sealed chamber, and the pressurizing mechanism is used to pressurize the internal space of the sealed chamber; a sealing mechanism is installed on the connecting pipe 1, and the sealing mechanism is used to control the opening and closing state of the connecting pipe 1; the sealing mechanism comprises a transmission device, at least one reset device and a plurality of sealing units; the plurality of sealing units are used to open and close the connecting pipe 1, the transmission device is simultaneously sleeved on the plurality of sealing units, and the power input end of the transmission device is connected to the pressurizing mechanism; the reset device is fixedly installed on the outer side wall of the sealed chamber, and the power input end of the reset device is connected to the transmission device, and the reset device is used to control the sealing unit to return to the sealed state;

[0008] The sealing unit comprises a limiting cylinder, a sealing plate, a connecting rod, a supporting roller and a spring; the limiting cylinder is fixedly mounted on the outer side wall of the connecting tube and the connection is communicated with the inside of the connecting tube; the sealing plate is mounted in the connecting tube and can slide along the limiting cylinder seal; the sealing plate is fixedly connected to the end of the connecting rod near the side wall of the limiting cylinder, and the end of the connecting rod away from the sealing plate passes through the limiting cylinder and is connected to the supporting roller; the spring is sleeved on the connecting rod and the two ends are fixedly connected to the supporting roller and the limiting cylinder respectively;

[0009] The transmission device includes a transmission rod 1 and a limiting cylinder; the limiting cylinder is simultaneously sleeved on the supporting rollers of multiple sealing units, one end of the transmission rod 1 is fixedly connected to the outer side wall of the limiting cylinder, and the other end of the transmission rod 1 passes through the side wall of the sealing chamber and is connected to the output end of the pressurizing mechanism;

[0010] The reset device comprises a sealing cylinder, a transmission rod, a piston and at least one connecting tube; the sealing cylinder is fixedly mounted on the outer wall of the sealing chamber, the piston is slidably mounted in the sealing cylinder, one end of the transmission rod is fixedly connected to the piston, and the other end of the transmission rod is fixedly connected to the transmission device; the end side wall of the sealing cylinder close to the sealing chamber is fixedly connected to the connecting tube, and the end of the connecting tube away from the sealing cylinder is connected to the limiting cylinder; an air inlet is also provided on the side wall of the sealing cylinder close to the sealing chamber, and an exhaust hole is provided on the side wall of the limiting cylinder close to its bottom, and both the air inlet and the exhaust holes are provided with one-way valves;

[0011] A sealing plug is arranged on the side wall of the sealed chamber; a fixing mechanism is installed in the experimental chamber, and the fixing mechanism is used to fix the animal.

[0012] Furthermore, the pressurizing mechanism includes a piston 1 and a pushing device, the piston 1 is in sealing contact with the inner wall of the sealed chamber; the side of the piston 1 close to the connecting tube 1 is fixedly connected to the transmission rod 1, and the side of the piston 1 away from the connecting tube 1 is fixedly connected to the output end of the pushing device.

[0013] Furthermore, the pressurizing mechanism includes a pressurizing pump, a guide column and a piston three, the same number as the transmission rod one; the output end of the pressurizing pump is connected to the sealed chamber, the end of the guide column is fixedly connected to the inner wall of the sealed chamber, the transmission rod one is located in the guide column, the piston three is fixedly connected to the transmission rod one and the piston three is in sliding contact with the inner wall of the guide column; the connection position between the guide column and the sealed chamber is connected to the external space.

[0014] Furthermore, the one-way valve includes a fixed bracket, a spring three, a fixed ring and a movable plate one; the side walls of the fixed bracket and the fixed ring are fixedly connected to the side walls of the air inlet or exhaust hole, the two ends of the spring three are respectively fixedly connected to the fixed bracket and the movable plate one, and the movable plate one is in contact with the side of the fixed ring away from the fixed bracket.

[0015] Furthermore, a water tank is provided at the bottom of the experimental chamber, at least one liquid outlet pipe connecting the bottom of the experimental chamber and the top of the water tank is provided between the bottom and the top of the water tank, a solenoid valve is installed on the liquid outlet pipe, a liquid inlet pipe is provided at the bottom of the water tank, one end of the liquid inlet pipe away from the water tank is connected to the top of the experimental chamber, and a water pump is installed on the liquid inlet pipe; a detachable sealing cover is connected to the side wall of the experimental chamber away from the connecting pipe, and a plurality of pressure relief holes are opened on the side wall of the experimental chamber near its top.

[0016] Furthermore, a slide groove is opened at the top or bottom of the experimental chamber, and a servo motor and a screw rod are arranged in the slide groove; the servo motor is fixedly installed at the end of the slide groove, the output end of the servo motor is fixedly connected to the end of the screw rod, the end of the screw rod away from the servo motor is rotatably connected to the end of the slide groove, and the fixing mechanism is sleeved on the screw rod.

[0017] Furthermore, the fixing mechanism includes a translation rod, a servo motor 2, a screw rod 3, a lifting plate, a stainless steel net and a plurality of fixing devices; the translation rod is sleeved on the screw rod 1, a vertical slide groove 2 is opened on the side wall of the translation rod, the servo motor 2 is fixedly installed at the end of the slide groove 2, the output end of the servo motor 2 is fixedly connected to the end of the screw rod 3, and the end of the screw rod 3 away from the servo motor 2 is rotatably connected to the other end of the slide groove 2; the lifting plate is sleeved on the screw rod 3; the lifting plate is rotatably connected to the side of the stainless steel net; a plurality of fixing devices are fixedly installed on the side of the stainless steel net away from the connecting pipe 1; vertical slide grooves 3 are opened on the two vertical sides of the stainless steel net, and at least one movable baffle is installed on the side of the stainless steel net close to the connecting pipe 1, and the two ends of the movable baffle are respectively located in the two slide grooves 3 and are in sliding contact with the slide grooves 3.

[0018] Furthermore, the fixing device is a fixing column.

[0019] Furthermore, the fixing device includes a fixed block, a pressure block, a movable plate 2 and a plurality of springs 4; the fixed block is fixedly embedded in the stainless steel mesh; the cross-section of the pressure block is T-shaped, and the pressure block is arranged through the fixed block; one end of the pressure block is fixedly connected to the movable plate 2, and the movable plate 2 is located on the side of the stainless steel mesh close to the connecting pipe 1; the two ends of the plurality of springs 4 are respectively fixedly connected to the movable plate 2 and the fixed block.

[0020] Furthermore, the limiting cylinder is a telescopic cylinder, which includes a sliding cylinder, multiple movable cylinders and multiple telescopic mechanisms, one end of the sliding cylinder is in sliding contact with an outer wall of a connecting tube; multiple movable cylinders are sleeved in sequence, and one of the movable cylinders is sleeved with the sliding cylinder; the number of telescopic mechanisms is the same as the number of movable cylinders; the telescopic mechanism includes a stepper motor and a screw rod 2, the stepper motors of the multiple telescopic mechanisms are respectively installed on the outer walls of the sliding cylinder and the multiple movable cylinders, the output end of the stepper motor is fixedly connected to the end of the screw rod 2, and the outer walls of the multiple movable cylinders close to their ends are sleeved on the screw rod 2.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. Two sealing plates are arranged in the connecting tube 1, and the sealing plates are connected to the supporting rollers through a connecting rod, and a spring 1 is arranged between the supporting rollers and the limiting cylinder. The inner side wall of the telescopic cylinder contacts the supporting rollers and limits the supporting rollers. At the same time, the outer side wall of the telescopic cylinder is connected to the transmission rod 1, and one end of the transmission rod 1 is connected to the pressurizing mechanism. When the pressurizing mechanism pressurizes the sealed chamber to a specified pressure value, the two sealing plates are opened under the action of the spring 1 to release the high-pressure gas instantly, thereby achieving the effect of simulating the detonation injury. Moreover, the technical solution can not only realize the release of the high-pressure gas under the specified pressure, but also does not need to replace the sealing device at the gas outlet position in each experiment.

[0023] 2. Two sealing cylinders are arranged on the outer wall of the sealing chamber, and the two ends of the transmission rod 2 are fixedly connected with the transmission rod 1 and the piston 2 in the sealing cylinder respectively. At the same time, the sealing cylinder is connected with the limiting cylinder through the connecting pipe 2. The side walls of the limiting cylinder and the sealing cylinder are respectively provided with exhaust holes and air inlet holes. In this way, after releasing the shock wave, it is only necessary to pull back the transmission rod 1 in the opposite direction to allow the supporting roller to return to the initial position and closely contact the inner wall of the telescopic cylinder. During the whole experimental process, the experimenter only needs to adjust the pressure to control the transmission rod 1 to move left and right to realize the release of the shock wave and the recovery of the initial state, which is simple to operate.

[0024] 3. A stepper motor is arranged on the outer wall of the sliding cylinder, and the output end of the stepper motor is fixedly connected to the end of the second screw rod. The outer wall of the end of the movable cylinder away from the sliding cylinder is convex and sleeved on the second screw rod. In this way, the relative position between the movable cylinder and the sliding cylinder is controlled by adjusting the rotation of the stepper motor to achieve the adjustment of the length of the entire telescopic cylinder. Different telescopic cylinder lengths correspond to different pressure values ​​in the pressurizing mechanism. When the telescopic cylinder is separated from the sealing mechanism, the gas of the set pressure can be released to achieve the effect of accurately adjusting the intensity of the shock wave.

[0025] 4. A water tank is arranged at the bottom of the experimental chamber, and a sealing cover is detachably arranged at the end of the experimental chamber away from the connecting pipe 1. A liquid inlet pipe and a liquid outlet pipe are arranged between the water tank and the experimental chamber, and a pump body is installed on the liquid inlet pipe, so that the water in the water tank can be pumped into the experimental chamber to achieve the effect of underwater simulation of blast injury; in addition, a plurality of pressure relief holes are opened on the side wall of the experimental chamber, and the pressure relief holes can discharge the released gas outside the experimental chamber to avoid the sudden increase of pressure in the experimental chamber, which affects the accuracy of the experiment;

[0026] 5. In addition to the pressure relief holes on the side wall of the experimental chamber, a sealing cover is also detachably installed at the end of the experimental chamber away from the connecting pipe. When the sealing cover is tightened, the pressure relief hole can simulate the window of a closed room, thereby simulating the detonation shock during an indoor explosion; when the sealing cover is removed, the detonation shock during an outdoor explosion can be simulated;

[0027] 6. The side of the stainless steel mesh is rotatably connected to the lifting plate, and the lifting plate is sleeved on the screw rod 3 connected to the servo motor 2. In this way, the height of the stainless steel mesh can be adjusted by rotating the screw rod 3, so that the axis direction of the shock wave is aligned with any part of the animal, so as to achieve the effect of accurately impacting any part of the animal; in addition, since the stainless steel mesh is rotatably connected to the lifting plate, the scenes of frontal detonation impact, side detonation impact and natural lying detonation impact can be simulated, which improves the practicality of the experimental device;

[0028] 7. Two movable baffles are set on the stainless steel net, so that the parts that need to be simulated by blast injury can be exposed, so as to achieve blast impact on the designated parts of the animal, thus improving the practicality of the experimental device;

[0029] 8. A fixed block is embedded in the stainless steel mesh, and a penetrating pressure block is arranged in the fixed block. The pressure block is fixedly connected to the movable plate 2 on one side close to the connecting pipe 1, and the movable plate 2 and the fixed block are connected by a spring 4, so that the rope for fixing the animal's limbs is put on the pressure block in a normal state, and the pressure block is in close contact with the fixed block under the action of the spring 4, thereby fixing the animal on the stainless steel mesh; after the shock wave is released, the movable plate 2 squeezes the spring 4, so that the pressure block is separated from the fixed block, and the shock wave also acts on the animal at the same time, so that the animal can fly out smoothly when it is hit by the shock wave, thereby achieving the effect of simulating the blast injury when the human body is hit by the blast and flies out in the combat environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a side cross-sectional view of a blast injury simulation experimental device provided in Example 1 of the present invention with air as the medium;

[0031] Figure 2 is a side cross-sectional view of a blast injury simulation experimental device provided in Example 1 of the present invention with water as the medium;

[0032] Figure 3 is a side cross-sectional view of the sealing mechanism provided in Example 1 of the present invention in a closed state;

[0033] Figure 4 is a schematic diagram of the structure of the transmission device provided in Example 1 of the present invention, which is located in the sliding cylinder;

[0034] Figure 5 is a side cross-sectional view of a sealing unit provided in Example 1 of the present invention in a closed state;

[0035] Figure 6 yes Figure 5 The enlarged view of point A in the middle;

[0036] Figure 7 is a side cross-sectional view of the sealing mechanism provided in Example 1 of the present invention in an open state;

[0037] Figure 8 yes Figure 7 Enlarged view in the middle;

[0038] Fig. 9 is a side cross-sectional view of the sealing unit provided in Example 1 of the present invention when it is in an open state;

[0039] Fig.10is a top cross-sectional view of a transmission device provided in Example 1 of the present invention;

[0040] Fig.11 is a right side view of the fixing mechanism provided in Example 1 of the present invention;

[0041] Fig.12 is a right side view of the fixing mechanism provided in Example 2 of the present invention;

[0042] Fig.13 is a side cross-sectional view of a blast injury simulation experimental device provided in Example 3 of the present invention;

[0043] Fig.14 is a side cross-sectional view of a stainless steel mesh provided in Example 3 of the present invention;

[0044] Fig.15 yes Fig.14 The enlarged view of point A in the middle;

[0045] Fig.16 It is a schematic diagram of the structure between the sealing chamber and the sealing mechanism provided in Example 4 of the present invention.

[0046] Reference numerals in the above drawings:

[0047] 1. Sealed chamber; 2. Piston 1; 3. Push rod; 4. Brushless motor; 5. Threaded rod; 6. Connecting pipe 1; 7. Piston 2; 8. Liquid outlet pipe; 9. Solenoid valve; 10. Guide rod 1; 11. Water tank; 12. Movable baffle; 13. Stainless steel mesh; 14. Fixed column; 15. Pressure relief hole; 16. Servo motor 1; 17. Screw rod 1; 18. Slide 1; 19. Liquid inlet pipe; 20. Experimental chamber; 21. Transmission rod 2; 22. Transmission rod 1; 23. Sealing cover; 24. Connecting pipe 2; 25. Connecting rod; 26. Sealing plate; 27. Limiting groove; 28. Sliding cylinder; 29. Support roller; 30, movable cylinder; 31, sealing cylinder; 32, spring one; 33, limit cylinder; 34, spring two; 35, exhaust hole; 36, fixed bracket; 37, spring three; 38, fixed ring; 39, movable plate one; 40, air inlet; 41, stepper motor; 42, screw two; 43, guide rod two; 44, servo motor two; 45, slide groove two; 46, slide groove three; 47, screw three; 48, translation rod; 49, lifting plate; 50, movable plate two; 51, pressure block; 52, fixed block; 53, spring four; 54, pressure pump; 55, guide column; 56, piston three. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0049] The implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0050] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0051] Reference Figure 1-16 The figure shows a preferred embodiment of the present invention.

[0052] Embodiment 1: A blast injury simulation experimental device, such as Figure 1-Figure 11 As shown, it includes a sealed chamber 1 and an experimental chamber 20, the outlet end of the sealed chamber 1 is connected to the air inlet end of the experimental chamber 20 through a connecting pipe 6; a sealing mechanism is installed on the connecting pipe 6, and the sealing mechanism is used to control the opening and closing of the channel of the connecting pipe 6. A pressurizing mechanism is set in the sealed chamber 1; the pressurizing mechanism is used to pressurize the internal space of the sealed chamber 1, and under the action of the pressurizing mechanism and the sealing mechanism, the sealed chamber 1 can release an airflow with a specified pressure value; in the experimental chamber 20, a fixing mechanism is installed, and the fixing mechanism is used to fix the animal, so that the high-pressure airflow released by the sealed chamber 1 directly impacts the animal, so as to complete the blast injury simulation experiment.

[0053] In this embodiment, the sealing mechanism is mainly composed of a transmission device, a reset device and two sealing units; Figure 5As shown, the sealing unit is mainly composed of a sealing plate 26, a limiting cylinder 33, a connecting rod 25, a spring 32 and a support roller 29. The limiting cylinder 33 is fixedly mounted on the outer wall of the connecting tube 6, and its connection position is an opening, and an opening of the same size is also opened on the side wall of the connecting tube 6 at the connection position of the limiting cylinder 33. The limiting cylinder 33 and the connecting tube 6, the limiting cylinder 33 and the size and shape of the connection opening match the size and shape of the sealing plate 26, and the sealing plate 26 can slide along the inside of the limiting cylinder 33 and the side wall is sealed and fitted. In this embodiment, since there are two sealing plates 26, the sealing plate 26 is set as a semicircular flat plate. The plane of the sealing plate 26 close to the limiting cylinder 33 is fixedly connected to one end of the connecting rod 25, and the other end of the connecting rod 25 passes through the top of the limiting cylinder 33 and is connected to the support roller 29. A spring 32 is fixedly installed between the support roller 29 and the top surface of the limiting cylinder 33, and the spring 32 is sleeved on the connecting rod 25. As shown Figure 3 and Figure 4 As shown, the sealing plates 26 of the two sealing units are in contact with each other in the sealing state. In order to improve the sealing effect, in this embodiment, the contact surfaces of the two sealing plates 26 are set to be tooth surfaces that match each other. In the sealing state, the support roller 29 is limited by the transmission device, so that the spring 1 32 is in a compressed state.

[0054] In this embodiment, the specific limiting method of the transmission device for the supporting roller 29 is as follows: Figure 3 , Figure 4 , Figure 7 and Fig.10 As shown, the transmission device is mainly composed of a telescopic cylinder and a transmission rod 22; in this embodiment, the telescopic cylinder is composed of two sections of cylinders, namely a movable cylinder 30 and a sliding cylinder 28. The outer wall of the movable cylinder 30 is in contact with the inner wall of the sliding cylinder 28. In a sealed state, the support roller 29 is as shown in FIG. Figure 3 and Figure 4, the spring 1 32 is squeezed, and the support roller 29 contacts the inner side wall of the telescopic cylinder under the action of the spring 1 32. Since there is a certain height difference between the inner side wall of the movable cylinder 30 and the inner side wall of the sliding cylinder 28, when the support roller 29 contacts the sliding cylinder 28 and changes to the inner side wall of the movable cylinder 30, due to the certain height difference between the inner side wall of the sliding cylinder 28 and the inner side wall of the movable cylinder 30, when the support roller 29 contacts the movable cylinder 30 and changes to the sliding cylinder 28, the spring 1 32 will drive the connecting rod 25 and the sealing plate 26 to move to both sides, resulting in the separation of the two sealing plates 26; so in this embodiment, a spring 2 34 is installed between the support roller 29 and the connecting rod 25, and the elastic coefficient of the spring 2 34 is smaller than the elastic coefficient of the spring 1 32, so that even if the support roller 29 contacts the movable cylinder 30 and changes to the sliding cylinder 28, under the action of the spring 2 34, the two sealing plates 26 will not be separated. In addition, in order to prevent the elastic force of the second spring 34 from changing suddenly and to allow the support roller 29 to transition smoothly, the inner side wall of the movable cylinder 30 near the end is set as a slope surface in this embodiment, so that the support roller 29 can always maintain close contact with the inner side wall of the entire telescopic cylinder. In order to allow the entire telescopic cylinder to move smoothly, a limiting groove 27 is opened on the outer side wall of the connecting pipe 1 6 in this embodiment, and one end of the sliding cylinder 28 is inserted into the limiting groove 27 through a limiting rod, so that the entire telescopic cylinder can slide smoothly.

[0055] The working principle of releasing the high-pressure gas in the sealed chamber 1 in this embodiment is to push the telescopic cylinder to move along the limit groove 27. When the telescopic cylinder is separated from the support roller 29, under the elastic force of the spring 32, the two sealing plates 26 move toward the limit cylinder 33, thereby instantly releasing the high-pressure gas in the sealed chamber 1 and forming a shock wave. In this embodiment, the end of the transmission rod 22 is fixedly connected to the outer wall of the sliding cylinder 28. When the transmission rod 22 moves toward the connecting pipe 6, it can drive the telescopic cylinder to move. The other end of the transmission rod 22 is connected to the pressurizing mechanism. When the pressurizing mechanism pressurizes the sealed chamber 1, it will push the transmission rod 22 to move. When the telescopic cylinder is separated from the support roller 29, the high-pressure gas under the current pressure can be released.

[0056] In this embodiment, in order to accurately adjust the released gas pressure value, such as Fig.10As shown, in this embodiment, a telescopic mechanism for adjusting the length of the entire telescopic cylinder is also arranged on the side walls of the sliding cylinder 28 and the movable cylinder 30. The telescopic mechanism includes a stepper motor 41 and a screw rod 42. In this embodiment, the outer wall of the end of the movable cylinder 30 is arranged as a protrusion, and is sleeved on the screw rod 42. The stepper motor 41 is fixedly installed on the outer wall of the sliding cylinder 28, and the output end of the stepper motor 41 is fixedly connected to the end of the screw rod 42. In this way, the relative position (the length of the telescopic cylinder) between the movable cylinder 30 and the sliding cylinder 28 can be adjusted by driving the screw rod 42 to rotate through the stepper motor 41. In this embodiment, in order to enable the movable cylinder 30 to slide stably, a guide rod 43 is installed on the outer wall of the sliding cylinder 28, and another protrusion at the end of the movable cylinder 30 is slidably sleeved on the guide rod 43.

[0057] The present embodiment is a small experimental device, and the pressurizing mechanism is mainly composed of two parts, namely a pushing device and a piston 2. The piston 2 is in the sealed chamber 1 and is in sliding contact with the inside of the sealed chamber 1. The pushing device can be pushed by a hydraulic cylinder. Since it is a small simulation experimental device, in the present embodiment, the pushing device is composed of a brushless motor 4, a threaded rod 5 and a push rod 3; one end of the push rod 3 is fixedly connected to the surface of the piston 2, the output end of the brushless motor 4 is fixedly connected to the end of the threaded rod 5, and the push rod 3 is sleeved on the threaded rod 5; the brushless motor 4 adopts a large torque motor, so that the piston 2 can be pushed to the right by rotation, so as to pressurize the space of the sealed chamber 1 located on the right side of the piston 2.

[0058] This embodiment uses the relationship between the compression amount and the pressure change of the ideal gas law to accurately adjust the pressure value of the released gas. The ideal gas state equation is: PV = nRT; where P is the pressure value in the sealed space of the sealed chamber 1 on the right side of the piston 2, in Pa, V is the volume of the sealed space of the sealed chamber 1 on the right side of the piston 2, in m^3, n is the amount of gas substance, in mol, R is the molar gas constant, the value is 8.314J / (mol·K), T is the system temperature, in K, which can be measured by a temperature sensor (not marked in the figure); when using the device, the telescopic cylinder is located at the leftmost position, at which time n, R, T, V, and P are all fixed values. Among them, ΔV=S·L, S is the cross-sectional area of ​​the sealed chamber 1, ΔV is the volume compression, and L is the distance between the support roller 29 and the end of the telescopic cylinder in the initial state. L can be determined by driving the screw 42 to rotate by the stepper motor 41; when V changes, the corresponding changed P value can also be accurately calculated; therefore, it is only necessary to adjust the overall length of the telescopic cylinder to accurately release the airflow of the specified pressure value.

[0059] After the telescopic cylinder and the support roller 29 are separated, the support roller 29 will pop out to both sides under the action of the spring 32; in order to enable it to be reset normally, in this embodiment, Figure 3 As shown, two reset mechanisms are provided, which specifically include a sealing cylinder 31, a piston 27, a connecting pipe 24 and a transmission rod 21; one end of the sealing cylinder 31 is fixed to the outer wall of the sealing chamber 1, and the piston 27 is in sealing contact with the sealing cylinder 31, so that the left side of the piston 27 is the sealing chamber 1. One end of the connecting pipe 24 is connected to the left end of the sealing cylinder 31 and communicates with the inside thereof, and the other end of the connecting pipe 24 is fixedly connected to the top of the limiting cylinder 33 and communicates with the inside thereof; as shown in FIG. Figure 5 and Figure 7 As shown, an exhaust hole 35 is provided on the side wall of the limiting cylinder 33 near its bottom, and an air inlet hole 40 is opened on the side wall of the sealing cylinder body 31 near the left end, and a one-way valve is fixedly installed inside the exhaust hole 35 and the air inlet hole 40; the one-way valve in the exhaust hole 35 allows the air flow to flow out from the inside of the limiting cylinder 33 to the outside of the limiting cylinder 33; the one-way valve in the air inlet hole 40 can only allow the air flow outside the sealing cylinder body 31 to enter the inside of the sealing cylinder body 31; when the sealing plate 26 is in a sealed state, the exhaust hole 35 is exposed and connected to the inside of the limiting cylinder 33; when the piston 2 is pushed, the transmission rod 22 drives the transmission rod 21 and the piston 27 to move synchronously. At this time, since the piston 27 moves to the right, negative pressure is generated, which will allow the gas outside the sealing cylinder body 31 to enter the sealing cylinder body 31 through the air inlet hole 40, ensuring that the inside of the sealing cylinder body 31 is in a normal pressure state. When the body is separated, since the sealing cylinder 31 is at normal pressure, the sealing plate 26 can smoothly enter the limiting cylinder 33 under the action of the spring 1 32 and contact with the top of the limiting cylinder 33, and the sealing plate 26 will block the exhaust hole 35 at this time; when the experiment is completed and needs to be reset, the piston 1 2 moves to the left, and the piston 2 7 is driven to move to the left under the action of the transmission rod 1 22 and the transmission rod 21. At this time, the air flow in the sealing cylinder 31 will be squeezed into the limiting cylinder 33 through the connecting pipe 24, and the air flow pushes the sealing plate 26 to move toward the connecting pipe 6. Finally, the spring 1 32 returns to the compressed state. At this time, the piston 1 2 continues to move, and the telescopic sleeve contacts the support roller 29 again. Since the two sealing plates 26 are closed, the gas discharged by the piston 2 7 will be discharged through the one-way valve in the exhaust hole 35 after entering the limiting cylinder 33, thereby realizing the reset of the experimental device. After piston 1 2 returns to the initial position, in order to ensure that the right chamber is at the set initial pressure value (normal pressure state), this embodiment also provides a sealing plug (not marked in the figure) on the outside of the sealed chamber 1. At this time, you only need to open the sealing plug to make the interior of the chamber at normal pressure. When pressurizing, just close the sealing plug.

[0060] In this embodiment, the specific structure of the one-way valve is as follows: Figure 6 and Figure 8 As shown, it includes a fixed bracket 36, a spring 37, a fixed ring 38 and a movable plate 39. The fixed bracket 36 and the fixed ring 38 are both installed on the side wall of the exhaust hole 35 or the air inlet hole 40. The two ends of the spring 37 are respectively connected to the fixed bracket 36 and the movable plate 39, and the movable plate 39 is in contact with the fixed ring 38. The spring 37 is in a slightly stretched state, and the movable plate 39 can cover the fixed ring 38, and under the tension of the spring 37, the fixed ring 38 is in close contact.

[0061] For the experimental chamber 20, Figure 1-2 As shown, a fixing mechanism for fixing the animal is provided inside the experimental chamber 20; the end of the experimental chamber 20 away from the connecting pipe 6 is open, and the animal can be placed in the experimental chamber 20. In order to simulate the blast injury at different distances, the present embodiment opens a horizontal slide slot 18 at the top of the experimental chamber 20, and a translation mechanism is installed in the slide slot 18, and the translation mechanism specifically includes a servo motor 16 and a screw rod 17. The servo motor 16 is fixed at one end of the slide slot 18, and the output end of the servo motor 16 is fixedly connected to the end of the screw rod 17, and the top of the fixing mechanism is sleeved on the screw rod 17, so that the distance between the fixing mechanism and the outlet end of the connecting pipe 6 can be adjusted by driving the screw rod 17 to rotate by the servo motor 16. In order to allow the fixing mechanism to translate stably and to avoid damage to the fixing mechanism caused by explosion impact, a slide groove 18 is also opened at the bottom of the experimental chamber 20. A guide rod 10 is installed in the slide groove 18, and the bottom of the fixing mechanism is sleeved on the guide rod 10.

[0062] In order to simulate the situation of underwater blast injury, the present embodiment sets a water tank 11 at the bottom of the experimental chamber 20, the water tank 11 is filled with water, and multiple liquid outlet pipes 8 are installed on the top of the water tank 11, the liquid outlet pipes 8 are connected to the bottom of the experimental chamber 20, and a solenoid valve 9 is installed on the liquid outlet pipe 8 to control the opening and closing state of the liquid outlet pipe 8. The bottom of the water tank 11 is connected to the top of the experimental chamber 20 through a liquid inlet pipe 19, and a water pump is installed on the liquid inlet pipe 19, and the water in the water tank 11 is pumped into the experimental chamber 20 through the water pump. In addition, in order to prevent water from flowing out, a sealing cover 23 is also installed at the opening of the experimental chamber 20 by means of threads, so that the water in the water tank 11 can be put into the experimental chamber 20, so that the impact of blast injury on animals with water as the medium can be simulated. In this embodiment, in order to ensure that the experimental chamber 20 maintains normal pressure during the blast injury experiment, a sufficient number of pressure relief holes 15 are opened on the side wall near the top of the experimental chamber 20 to avoid the inside of the experimental chamber 20 being in a high pressure state during the blast injury impact, which affects the experimental effect.

[0063] The fixing mechanism of this embodiment is used to fix the animal. Fig.11As shown, the fixing mechanism includes a stainless steel mesh 13, a translation rod 48, a lifting plate 49 and a lifting device. The translation rod 48 is simultaneously sleeved on the screw rod 17 and the guide rod 10. The stainless steel mesh 13 is surrounded by a frame, and five fixing columns 14 are installed on the stainless steel mesh 13. Taking a mouse as an example, the five fixing columns 14 fix the head and four legs of the mouse respectively, and the fixing columns 14 are located on the side of the stainless steel mesh 13 away from the connecting pipe 6. The top central axis position of the stainless steel mesh 13 is rotatably connected to the lifting plate 49 and has a certain damping. The lifting plate 49 is sleeved on the lifting device. A slide groove 2 45 with an opening on one side is provided on the translation rod 48, and a servo motor 2 44 is fixedly installed on the top of the slide groove 2 45. The output end of the servo motor 2 44 is fixedly connected to the top of the screw rod 3 47, and the bottom of the screw rod 3 47 is connected to the bottom of the slide groove 2 45 by means of a bearing. The lifting plate 49 is sleeved on the screw rod 3 47. The experimenter adjusts the height of the stainless steel mesh 13 by turning on the servo motor 2 44 to drive the screw rod 3 47 to rotate, so that the axis direction of the shock wave ejected by the connecting tube 1 6 can be directly aimed at any part of the animal. In addition, the stainless steel mesh 13 can rotate around the vertical axis direction, so as to simulate the situation of blast injury when in the sideways position.

[0064] In order to accurately perform explosive impact on different parts of the animal, in this embodiment, slide grooves 46 are opened on both sides of the stainless steel mesh 13, and then two movable baffles 12 are installed between the two slide grooves 46. The movable baffles 12 move up and down along the slide grooves 46, and the movable baffles 12 are located on the side of the stainless steel mesh 13 close to the connecting pipe 6. In this way, other parts of the animal can be shielded by the movable baffles 12, and only the specified parts of the animal are exposed, so that the experimenters can explore the explosive injuries of different parts of the animal when the animal is subjected to explosive impact under the same state.

[0065] Embodiment 2: A blast injury simulation experimental device. The difference between the experimental device of this embodiment and that of embodiment 1 is that the connection position of the lifting plate 49 and the stainless steel mesh 13 in the fixing mechanism is different. In this embodiment, Fig.12 As shown, the lifting plate 49 is connected to the side center axis of the stainless steel mesh 13 by rotation, and has a certain damping. The stainless steel mesh 13 can rotate around the horizontal center axis, which can not only turn the animal's front to the direction of the shock wave, but also simulate the situation of blast injury in a natural lying state. It should be noted that the lifting plate 49 and the side of the stainless steel mesh 13 are connected by rotation within the protection scope of the patent of this invention.

[0066] Embodiment 3: A blast injury simulation experimental device, such as Figure 13-15As shown, the difference between this embodiment and embodiment 1 is that the side of the experimental chamber 20 away from the connecting pipe 6 is a completely open structure, and the water supply system such as the water tank 11 is eliminated. In this embodiment, the experimental chamber 20 is set as a completely open structure, the purpose is to explore the blast injury of the animal after being blown away by the blast shock wave. Therefore, in this embodiment, the fixing column 14 for fixing the animal is replaced, such as Fig.14 and Fig.15 As shown, a fixing block 52 is embedded at the position of the original fixing column 14 on the stainless steel mesh 13, and a pressing block 51 is installed on the fixing block 52. The entire pressing block 51 is set in the fixing block 52, and the pressing block 51 is fixedly connected to the movable plate 2 50 on the side close to the connecting pipe 1 6. The movable plate 2 50 and the fixing block 52 are connected by a spring 4 53. The pressing block 51 is T-shaped as a whole, and the cross-section of the right end is the largest. When in use, the rope on the animal is put on the pressing block 51, and the pressing block 51 is subjected to the elastic force of the spring 4 53, so that the pressing block 51 and the fixing block 52 are closely fitted, thereby pressing the rope and fixing the animal. When the animal is hit by the blast wave, the movable plate 2 50 is first hit by the blast wave, squeezing the spring 4 53. At this time, a gap will appear between the right side of the pressing block 51 and the fixed block 52. Since the animal is also affected by the blast wave, the rope on the pressing block 51 will fall off, and the animal will be blown away. This makes it easier for the experimenter to explore the blast injury of the animal after being blown away by the blast wave. In order to allow the animal to fly out smoothly after being hit by the blast wave, Fig.15 As shown, in this embodiment, the bending part of the pressing block 51 is set to be an arc shape. It should be noted that any structure that can fix the rope for fixing an animal is within the protection scope of the patent of the present invention.

[0067] Embodiment 4: A blast injury simulation experimental device. The pressurizing mechanism of this embodiment is different from that of embodiment 1. Fig.16 As shown, the pressurizing mechanism in this embodiment includes a pressurizing pump 54, two hollow guide posts 55 and two pistons 3 56. Both guide posts 55 are located in the sealed chamber 1. The ends of the two transmission rods 1 22 away from the telescopic cylinder are respectively located in the two guide posts 55 and fixedly connected to the pistons 3 56. The side walls of the pistons 3 56 are in sealed contact with the inner side walls of the guide posts 55. In order to ensure that the pistons 3 56 can translate left and right, a vent hole connected to the outside is provided at the connection between the guide posts 55 and the side walls of the sealed chamber 1. The gas outlet end of the pressurizing pump 54 is connected to the inside of the sealed chamber 1. In this embodiment, the pressurizing pump 54 is used to continuously inject gas into the sealed chamber 1 for pressurization. When the pressure on the left side of the piston 3 56 increases, the transmission rod 1 22 and the telescopic cylinder will be pushed to move to the right. In order to reduce the influence of the increase in the space between the piston 3 56 and the left end of the guide post 55 on the internal pressure of the entire sealed chamber 1, the internal cross-section of the guide post 55 is set to be very small in this embodiment, so that the space change on the left side of the piston 3 56 can be ignored.

[0068] The pressure pump 54 is used to pressurize the sealed chamber 1, so that the technical solution can be applied to a large experimental space. The sealed chamber 1 can be a specific closed room, and the experimental chamber 20 can also be a room, so that animals of the same size as humans can be selected for experiments, and the simulation will be more accurate. Therefore, it should be noted that as long as the pressure mechanism can push the transmission rod 22 to move to the right, thereby separating the telescopic cylinder and the support roller 29, the structure of the pressure mechanism is within the protection scope of the patent of this invention.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A blast injury simulation experimental device, comprising a sealed chamber (1) and an experimental chamber (20), wherein a connecting pipe (6) is installed between the sealed chamber (1) and the experimental chamber (20) to connect the sealed chamber (1) and the experimental chamber (20); characterized in that: A pressurizing mechanism is provided in the sealed chamber (1), and is used to pressurize the internal space of the sealed chamber (1); a sealing mechanism is installed on the connecting pipe (6), and is used to control the opening and closing state of the connecting pipe (6); the sealing mechanism includes a transmission device, at least one reset device and a plurality of sealing units; the plurality of sealing units are used to open and close the connecting pipe (6), the transmission device is simultaneously sleeved on the plurality of sealing units, and the power input end of the transmission device is connected to the pressurizing mechanism; the reset device is fixedly installed on the outer wall of the sealed chamber (1), and the power input end of the reset device is connected to the transmission device, and the reset device is used to control the sealing unit to return to the sealed state; The sealing unit comprises a limiting cylinder (33), a sealing plate (26), a connecting rod (25), a supporting roller (29) and a spring (32); the limiting cylinder (33) is fixedly mounted on the outer side wall of the connecting tube (6) and the connection is communicated with the interior of the connecting tube (6); the sealing plate (26) is mounted in the connecting tube (6) and can slide along the limiting cylinder (33) in a sealing manner; the side wall of the sealing plate (26) close to the limiting cylinder (33) is fixedly connected to the end of the connecting rod (25), and the end of the connecting rod (25) away from the sealing plate (26) passes through the limiting cylinder (33) and is connected to the supporting roller (29); the spring (32) is sleeved on the connecting rod (25) and the two ends are fixedly connected to the supporting roller (29) and the limiting cylinder (33) respectively; The transmission device comprises a transmission rod (22) and a limiting cylinder (33); the limiting cylinder (33) is simultaneously sleeved on the supporting rollers (29) of the plurality of sealing units, one end of the transmission rod (22) is fixedly connected to the outer side wall of the limiting cylinder (33), and the other end of the transmission rod (22) passes through the side wall of the sealing chamber (1) and is connected to the output end of the pressurizing mechanism; The reset device comprises a sealing cylinder (31), a second transmission rod (21), a second piston (7) and at least one second connecting pipe (24); the sealing cylinder (31) is fixedly mounted on the outer wall of the sealing chamber (1), the second piston (7) is slidably mounted in the sealing cylinder (31), one end of the second transmission rod (21) is fixedly connected to the second piston (7), and the other end of the second transmission rod (21) is fixedly connected to the transmission device; the end side wall of the sealing cylinder (31) close to the sealing chamber (1) is fixedly connected to the second connecting pipe (24), and the end of the second connecting pipe (24) away from the sealing cylinder (31) is connected to the limiting cylinder (33); an air inlet (40) is formed on the side wall of the sealing cylinder (31) close to the sealing chamber (1), and an air outlet (35) is formed on the side wall of the limiting cylinder (33) close to the bottom thereof, and both the air inlet (40) and the air outlet (35) are provided with a one-way valve; A sealing plug is provided on the side wall of the sealed chamber (1); a fixing mechanism is installed in the experimental chamber (20), and the fixing mechanism is used to fix the animal.

2. The blast injury simulation experimental device according to claim 1, characterized in that: The pressurizing mechanism comprises a piston (2) and a pushing device. The piston (2) is in sealing contact with the inner wall of the sealed chamber (1). The side of the piston (2) close to the connecting pipe (6) is fixedly connected to the transmission rod (22), and the side of the piston (2) away from the connecting pipe (6) is fixedly connected to the output end of the pushing device.

3. The blast injury simulation experimental device according to claim 1, characterized in that: The pressurizing mechanism comprises a pressurizing pump (54), a guide column (55) and a piston three (56) having the same number as the transmission rod one (22); the output end of the pressurizing pump (54) is communicated with the sealed chamber (1), the end of the guide column (55) is fixedly connected to the inner wall of the sealed chamber (1), the transmission rod one (22) is located in the guide column (55), the piston three (56) is fixedly connected to the transmission rod one (22), and the piston three (56) is in sliding contact with the inner wall of the guide column (55); the connection position between the guide column (55) and the sealed chamber (1) is communicated with the external space.

4. The blast injury simulation experimental device according to claim 1, characterized in that: The one-way valve comprises a fixed bracket (36), a spring three (37), a fixed ring (38) and a movable plate one (39); the side walls of the fixed bracket (36) and the fixed ring (38) are fixedly connected to the side walls of the air inlet (40) or the air outlet (35); the two ends of the spring three (37) are respectively fixedly connected to the fixed bracket (36) and the movable plate one (39); the movable plate one (39) contacts the side of the fixed ring (38) away from the fixed bracket (36).

5. The blast injury simulation experimental device according to claim 1, characterized in that: A water tank (11) is provided at the bottom of the experimental chamber (20); at least one liquid outlet pipe (8) is provided between the bottom of the experimental chamber (20) and the top of the water tank (11); a solenoid valve (9) is installed on the liquid outlet pipe (8); a liquid inlet pipe (19) is provided at the bottom of the water tank (11); an end of the liquid inlet pipe (19) away from the water tank (11) is connected to the top of the experimental chamber (20); a water pump is installed on the liquid inlet pipe (19); a detachable sealing cover (23) is connected to the side wall of the experimental chamber (20) away from the connecting pipe (6); and a plurality of pressure relief holes (15) are opened on the side wall of the experimental chamber (20) near the top thereof.

6. The blast injury simulation experimental device according to claim 1, characterized in that: A slide groove (18) is provided at the top or bottom of the experimental chamber (20), and a servo motor (16) and a screw rod (17) are arranged in the slide groove (18); the servo motor (16) is fixedly installed at the end of the slide groove (18), the output end of the servo motor (16) is fixedly connected to the end of the screw rod (17), the end of the screw rod (17) away from the servo motor (16) is rotatably connected to the end of the slide groove (18), and the fixing mechanism is sleeved on the screw rod (17).

7. The blast injury simulation experimental device according to claim 6, characterized in that: The fixing mechanism comprises a translation rod (48), a second servo motor (44), a third screw rod (47), a lifting plate (49), a stainless steel net (13) and a plurality of fixing devices; the translation rod (48) is sleeved on the first screw rod (17), a vertical second slide groove (45) is opened on the side wall of the translation rod (48), the second servo motor (44) is fixedly installed at the end of the second slide groove (45), the output end of the second servo motor (44) is fixedly connected to the end of the third screw rod (47), and the end of the third screw rod (47) away from the second servo motor (44) is connected to the other end of the second slide groove (45). Rotationally connected; the lifting plate (49) is sleeved on the screw rod three (47); the lifting plate (49) is rotationally connected to the side of the stainless steel mesh (13); a plurality of fixing devices are fixedly installed on the side of the stainless steel mesh (13) away from the connecting pipe one (6); vertical sliding grooves three (46) are opened on the two vertical sides of the stainless steel mesh (13), and at least one movable baffle (12) is installed on the side of the stainless steel mesh (13) close to the connecting pipe one (6), and the two ends of the movable baffle (12) are respectively located in the two sliding grooves three (46) and are in sliding contact with the sliding grooves three (46).

8. The blast injury simulation experimental device according to claim 7, characterized in that: The fixing device is a fixing column (14).

9. The blast injury simulation experimental device according to claim 7, characterized in that: The fixing device comprises a fixing block (52), a pressing block (51), a movable plate 2 (50) and a plurality of springs 4 (53); the fixing block (52) is fixedly embedded in the stainless steel net (13); the cross section of the pressing block (51) is T-shaped, and the pressing block (51) is arranged through the fixing block (52); one end of the pressing block (51) is fixedly connected to the movable plate 2 (50), and the movable plate 2 (50) is located on a side of the stainless steel net (13) close to the connecting pipe 1 (6); the two ends of the plurality of springs 4 (53) are respectively fixedly connected to the movable plate 2 (50) and the fixing block (52).

10. The blast injury simulation experimental device according to claim 1, characterized in that: The limiting cylinder (33) is a telescopic cylinder, which includes a sliding cylinder (28), a plurality of movable cylinders (30) and a plurality of telescopic mechanisms. One end of the sliding cylinder (28) is in sliding contact with the outer wall of the connecting pipe (6); the plurality of movable cylinders (30) are sleeved in sequence, and one of the movable cylinders (30) is sleeved with the sliding cylinder (28); the number of the telescopic mechanisms is the same as the number of the movable cylinders (30); The telescopic mechanism comprises a stepper motor (41) and a second screw rod (42). The stepper motors (41) of the plurality of telescopic mechanisms are respectively mounted on the outer side walls of the sliding cylinder (28) and the plurality of movable cylinders (30). The output end of the stepper motor (41) is fixedly connected to the end of the second screw rod (42). The outer side walls of the plurality of movable cylinders (30) near their ends are sleeved on the second screw rod (42).

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