Shelter for creating target penetration low-temperature environment through liquid nitrogen dispersion

Abstract

The invention belongs to the technical field of ultralow-temperature tests, and particularly discloses a shelter for creating a target penetration low-temperature environment through liquid nitrogen dispersion, the shelter comprises a shelter body, a speed measuring device, a front image collecting device and a target platform, and the shelter body is formed by assembling a front door plate, a rear door plate, a bottom plate, a top plate and side plates; a low-temperature creating system is mounted on the top plate and the side plates; the interior of the square cabin is sequentially divided into an area A, an area B and an area C from left to right, front image acquisition devices are arranged at the corners of the front end and the rear end of the area A respectively, and speed measuring devices are arranged on the right sides of the front image acquisition devices; the area B is provided with a target table, and a sample is placed on the upper end face of the target table; a rear image acquisition device is arranged at the junction of the B area and the C area and is mounted on the lower end surface of the top plate; a recovery device is arranged at the right end of the area C; the exterior of the shelter is made of the insulating heat-insulating material, so that the internal low-temperature environment can be effectively kept, and the structural performance and anti-penetration protection performance of the material in an extremely cold region can be conveniently evaluated.

Description

Technical Field

[0001] The invention belongs to the technical field of ultra-low temperature testing, and in particular relates to a cabin in which liquid nitrogen is diffused to create a low-temperature environment for a target to penetrate. Background Art

[0002] In an extremely cold environment, the performance and structure of the material will be affected by the ultra-low temperature environment. At the same time, the mechanical properties of the material will also change in a low temperature environment. This change is particularly important for the design of special structures with resistance to penetration. At this time, a test method is needed to test the internal structure of the material for resistance to penetration in a low temperature environment. A reusable low-temperature environment should be constructed to conduct experiments on penetration protection designs of different speeds and calibers on different test materials, so as to conduct target resistance to penetration evaluation and verification in a standardized manner, thereby facilitating the evaluation of the structural performance and anti-penetration protection performance of materials in extremely cold areas.

[0003] In order to create a low-temperature environment, it is generally necessary to build a cabin for experiments. When using a cabin for experiments, the interior of the cabin needs to be closed, the indoor temperature should be kept stable, and the cooling rate should be adjustable. However, in actual use, the cabin is generally built in a place with a more suitable temperature, and the temperature inside the cabin is greatly affected by the external temperature. Although the interior of the cabin is closed, when conducting experiments, the entrance port needs to be opened for shooting, which will also affect the internal temperature. When controlling the temperature, the internal temperature of the cabin needs to be quickly lowered before the experiment begins. During the experimental stage, the internal temperature of the cabin needs to be maintained to create a stable low-temperature environment. In order to conduct experiments; in the prior art, some patents have disclosed liquid nitrogen low-temperature control systems, such as the temperature control system disclosed in patent CN116609208A, which can only adjust the temperature at the air supply port, which is suitable for temperature control requirements in small spaces. When used in a large-space cabin, the internal temperature adjustment is slow and cannot meet the requirements for temperature uniformity inside the cabin; the temperature control system disclosed in patent CN110262587A, because penetration experiments need to be carried out in the cabin, shrapnel is easy to splash during the experiment, which can easily cause equipment damage; when the temperature control equipment is installed inside the cabin, it is easy to cause equipment damage, destroy the internal environment, and make the experiment impossible. Summary of the invention

[0004] In view of the problems existing in the background technology, the present invention provides a cabin for creating a low-temperature environment for target penetration by liquid nitrogen diffusion.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a cabin for creating a low-temperature environment by liquid nitrogen diffusion, comprising a cabin, a low-temperature creation system, a speed measuring device, a front image acquisition device and a target platform, wherein the cabin is a rectangular box structure, and is assembled from a front door panel, a rear door panel, a bottom panel, a top panel and a side panel; the low-temperature creation system is installed on the top panel and the side panel, and a lower air inlet is provided at the bottom of the side panel; the interior of the cabin is divided into A zone, B zone and C zone from left to right, and the front and rear corners of the A zone are respectively provided with a front image acquisition device, and a speed measuring device is provided on the right of the front image acquisition device; the B zone is provided with a target platform, and a sample is placed on the upper end surface of the target platform; a rear image acquisition device is provided at the junction of the B zone and the C zone, and the rear image acquisition device is installed on the lower end surface of the top plate; a recovery device is provided at the right end of the C zone.

[0006] The low temperature creation system includes a cold source, a one-way valve, a pump, a nozzle, an evaporation disk and a fan; the cold source is connected to the inlet of the one-way valve through a pipeline, the outlet of the one-way valve is connected to the pump through a pipeline, the pump is connected to the air inlet of the nozzle through a pipeline, and the air outlet of the nozzle is connected to the inside of the evaporation disk; the evaporation disk is arranged on the lower end surface of the top plate, and a fan is arranged between the evaporation disk and the top plate.

[0007] An upper air outlet is arranged on the lower end surface of the evaporation plate, side air outlets are arranged on the left and right ends of the evaporation plate, exhaust ports are arranged on the front and rear sides of the evaporation plate, the exhaust ports are connected with the lower air inlet through the air duct, and the lower air inlet is arranged at the lower end of the side plate of the cabin.

[0008] The target platform is a liftable bracket, the upper end of the target platform is provided with a storage rack, and the storage rack is provided with a temperature measuring device.

[0009] The front image acquisition device includes a front camera and a front protective cover; the front protective cover is mounted on the outside of the front camera, the main body of the front protective cover is a metal plate, and the front end of the front camera lens is made of bulletproof transparent glass; the rear image acquisition device has the same structure as the front image acquisition device.

[0010] The front door panel, the rear door panel, the top panel and the side panels are provided with a bulletproof panel, a heat insulating layer and a structural layer in sequence from the inside to the outside.

[0011] The recovery device is composed of multiple stacked boxes, and the inside of the boxes is filled with sand.

[0012] An entrance is arranged in the middle of the front end surface of the front door plate.

[0013] The lower air inlet is connected to the upper fan through the internal pipeline of the side plate.

[0014] Beneficial effects of the invention: The invention provides a cabin for creating a low-temperature environment for target penetration by liquid nitrogen diffusion. The exterior of the cabin is made of insulating and heat-isolating materials, which can effectively maintain the internal low-temperature environment; the interior of the cabin is provided with a protective device, which can effectively avoid damage to internal equipment; the low-temperature creation system inside the cabin can quickly reduce the temperature inside the cabin, and can effectively control the temperature to create a controllable low-temperature environment, thereby facilitating the evaluation of the structural performance and anti-penetration protection performance of the material in extremely cold areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the internal structure of the shelter.

[0016] Figure 2 This is the left view of the shelter.

[0017] Figure 3 This is a bottom view of the evaporation plate.

[0018] Figure 4 for Figure 1 Enlarged view of point A in the middle.

[0019] In the figure: 1. Cabin, 3. Speed ​​measuring device, 4. Front image acquisition device, 5. Recovery device, 6. Target platform, 7. Sample, 8. Rear image acquisition device, 11. Area A, 12. Area B, 13. Area C, 14. Front door panel, 15. Rear door panel, 16. Top plate, 21. Cold source, 22. One-way valve, 23. Pump, 24. Nozzle, 25. Evaporation plate, 26. Fan, 27. Upper air outlet, 28. Side air outlet, 29. Lower air inlet, 41. Front camera, 42. Front protective cover, 141. Incident port, 101. Bulletproof plate, 102. Insulation layer, 103. Structural layer. DETAILED DESCRIPTION

[0020] The technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the specification. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] The following is combined with Figure 1-4The specific implementation mode of the present invention is further elaborated in detail: a cabin for creating a low-temperature environment for a target to penetrate by liquid nitrogen diffusion, comprising a cabin 1, a low-temperature creation system, a speed measuring device 3, a front image acquisition device 4 and a target platform 6. The cabin 1 is a rectangular box structure, and the cabin 1 is assembled by a front door panel 14, a rear door panel 15, a bottom panel, a top panel 16 and a side panel; the front door panel 14, the rear door panel 15, the top panel 16 and the side panel are provided with a bulletproof plate 101, an insulation layer 102 and a structural layer 103 from the inside to the outside in sequence; the bulletproof plate 101 is used to prevent ricochet or the ballistic deflection after penetrating the target and hitting the inner wall of the cabin, damaging the insulation structure and causing deformation of the cabin; the insulation layer 102 is made of insulating and heat-insulating materials, and in actual use In use, hard foam is often used to reduce the contact between the inside and outside of the cabin, and at the same time, it can also extend the use time of the low-temperature environment in the cabin; the structural layer 103 is the main frame of the cabin; an inlet 141 is provided in the middle of the front end face of the front door panel 14, and the inlet 141 is covered with a transparent curtain to prevent the cold air in the cabin from overflowing. Before shooting, the curtain is closed, and at the moment of shooting, the curtain is opened for shooting; a lower air inlet 29 is provided at the lower end of the side panel, and the lower air inlet 29 is connected to the upper fan 26 through the internal pipe of the side panel; a low temperature creation system is installed on the top plate 16; the low temperature creation system includes a cold source 21, a one-way valve 22, a pump 23, a nozzle 24, an evaporation disk 25 and a fan 26; the The cold source 21 is a liquid nitrogen tank, which is connected to the inlet of the one-way valve 22 through a pipeline, and the outlet of the one-way valve 22 is connected to the pump 23 through a pipeline, and the pump 23 is connected to the air inlet of the nozzle 24 through a pipeline, and the air outlet of the nozzle 24 is connected to the inside of the evaporation disk 25; the evaporation disk 25 is arranged on the lower end surface of the top plate 16, and a fan 26 is arranged between the evaporation disk 25 and the top plate 16, and the fan 26 is a fan group composed of a plurality of small fans, and the cooling rate can be controlled by controlling the number of small fans started; an upper air outlet 27 is arranged on the lower end surface of the evaporation disk 25, side air outlets 28 are arranged at the left and right ends of the evaporation disk 25, and exhaust ports are arranged on the front and rear sides of the evaporation disk 25; in actual use, the pump 23 will Liquid nitrogen is transported to the nozzle 24 through a pipeline, and the liquid nitrogen is sprayed out at a certain speed into the evaporation disk 25 for rapid atomization. The liquid nitrogen entering the evaporation disk 25 is rapidly atomized by the fan 26, and the atomized liquid nitrogen flows out from each air outlet and diffuses inside the cabin to form a cooling effect. During the rotation of the fan 26, a negative pressure is formed at the fan 26. Under the action of the negative pressure, the air at the lower end of the cabin 1 enters the fan 26 from the lower air inlet 29, so that air convection is formed inside the cabin 1, thereby ensuring the cooling effect inside the box. Before the experiment starts, the fan 26 is started to the maximum air volume, and the fan 26 blows the atomized liquid nitrogen out of the air outlet and diffuses inside the cabin, so that the temperature inside the cabin drops rapidly until the experimental requirements are met.During the experiment phase, the air volume of the fan 26 can be reduced according to the temperature of the cabin to keep the temperature inside the cabin stable for the experiment; The interior of the square cabin 1 is divided into an A zone 11, a B zone 12 and a C zone 13 from left to right. The front and rear corners of the A zone 11 are respectively provided with a front image acquisition device 4, and a speed measuring device 3 is provided to the right of the front image acquisition device 4; the front image acquisition device 4 includes a front camera 41 and a front protective cover 42; the front protective cover 42 is sleeved on the outside of the front camera 41 to protect the front camera 41 to prevent the front camera 41 from being damaged by ricochets or fragments. The main body of the front protective cover 42 is a metal plate, and the front end of the front camera 41 lens is made of bulletproof transparent glass to facilitate observation by the front camera 41; the B zone 12 is provided with a target platform 6, and a sample 7 is placed on the upper end surface of the target platform 6; the target platform 6 is a liftable bracket, and a storage rack is provided at the upper end of the target platform 6, and a storage rack is provided on the storage rack. There is a temperature measuring device, which is used to monitor the real-time temperature of the sample 7 at the upper end of the target platform 6; in this embodiment, a plurality of temperature measuring devices are arranged inside the square cabin 1, and the temperature measuring device can timely feed back the real-time temperature inside the square cabin 1 to the external control system, which is processed by the PLC processor to control the start and stop of the pump for conveying liquid nitrogen and the working time of the fan; a rear image acquisition device 8 is arranged at the junction of the B area 12 and the C area 13, and the rear image acquisition device 8 is installed on the lower end surface of the top plate 16, and the rear image acquisition device 8 has the same structure as the front image acquisition device 4; a recovery device 5 is arranged at the right end of the C area 13; the recovery device 5 is composed of a multi-layer stacked box body, and the interior of the box body is filled with sand and soil, which is used to recover fragments that pass through the target to prevent ricochet or fragments from hitting other equipment and causing losses.

[0022] The use process of the present invention is as follows: first, assemble the cabin 1, and set bulletproof plates 101 on the inner side of the cabin 1, and place the recovery device 5 at the right end of the C zone 13 of the cabin 1; after the installation is completed, close the front and rear doors of the cabin 1; start the low temperature creation system device, at this time, the atomized liquid nitrogen flows out from each air outlet and diffuses inside the cabin body to form a cooling effect; through multiple temperature measuring devices inside the cabin 1, the real-time temperature of various places inside the cabin 1 can be fed back to the outside in time, when the temperature inside the cabin 1 reaches the experimental temperature, the operator can reduce the air volume of the fan 26 and wait for the temperature inside the cabin 1 to stabilize; after a period of time, the temperature inside the cabin 1 is stable, and the experimenter can perform a shooting experiment from the incident port 141; after the experiment, check whether the equipment inside the cabin 1 is damaged, if damaged, it needs to be replaced in time to facilitate the next experiment.

[0023] 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, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0024] The parts not described in detail in this invention are prior art.

Claims

1. A cabin for creating a low-temperature environment for target penetration by liquid nitrogen diffusion, comprising a cabin (1), a low-temperature creation system, a speed measuring device (3), a front image acquisition device (4) and a target platform (6), wherein: The cabin (1) is a rectangular box structure, and is assembled from a front door panel (14), a rear door panel (15), a bottom panel, a top panel (16), and side panels; a lower air inlet (29) is provided at the bottom of the side panel, and a low-temperature creation system is installed on the top panel (16); the interior of the cabin (1) is divided into an A zone (11), a B zone (12), and a C zone (13) from left to right, and a front image acquisition device (4) is provided at the front and rear corners of the A zone (11), and a speed measuring device (3) is provided to the right of the front image acquisition device (4); a target platform (6) is provided in the B zone (12), and a sample (7) is placed on the upper end surface of the target platform (6); a rear image acquisition device (8) is provided at the junction of the B zone (12) and the C zone (13), and the rear image acquisition device (8) is installed on the lower end surface of the top panel (16); and a recovery device (5) is provided at the right end of the C zone (13).

2. According to claim 1, a shelter for creating a low-temperature environment for target penetration by liquid nitrogen diffusion, characterized in that: The low-temperature creation system comprises a cold source (21), a one-way valve (22), a pump (23), a nozzle (24), an evaporation disk (25) and a fan (26); the cold source (21) is connected to the inlet of the one-way valve (22) through a pipeline, the outlet of the one-way valve (22) is connected to the pump (23) through a pipeline, the pump (23) is connected to the air inlet of the nozzle (24) through a pipeline, and the air outlet of the nozzle (24) is connected to the inside of the evaporation disk (25); the evaporation disk (25) is arranged on the lower end surface of the top plate (16), and a fan (26) is arranged between the evaporation disk (25) and the top plate (16).

3. According to claim 2, a cabin for creating a low-temperature environment for target penetration by liquid nitrogen diffusion, characterized in that: An upper air outlet (27) is provided on the lower end surface of the evaporation plate (25), side air outlets (28) are provided at the left and right ends of the evaporation plate (25), and exhaust ports are provided at the front and rear sides of the evaporation plate (25).

4. According to claim 1, a shelter for creating a low-temperature environment for target penetration by liquid nitrogen diffusion, characterized in that: The target platform (6) is a liftable bracket, and a storage rack is provided at the upper end of the target platform (6).

5. According to claim 1, a shelter for creating a low-temperature environment for target penetration by liquid nitrogen diffusion, characterized in that: The front image acquisition device (4) comprises a front camera (41) and a front protective cover (42); the front protective cover (42) is sleeved on the outside of the front camera (41); the main body of the front protective cover (42) is a metal plate; the front end of the lens of the front camera (41) is made of bulletproof transparent glass; the rear image acquisition device (8) has the same structure as the front image acquisition device (4).

6. According to claim 1, a shelter for creating a low-temperature environment for target penetration by liquid nitrogen diffusion, characterized in that: The front door panel (14), the rear door panel (15), the top panel (16) and the side panels are provided with a bulletproof panel (101), a heat insulating layer (102) and a structural layer (103) in sequence from the inside to the outside.

7. According to claim 1, a shelter for creating a low-temperature environment for target penetration by liquid nitrogen diffusion, characterized in that: The recovery device (5) is composed of multiple layers of stacked boxes, the interior of which is filled with sand.

8. According to claim 1, a shelter for creating a low-temperature environment for target penetration by liquid nitrogen diffusion, characterized in that: An entrance port (141) is provided in the middle of the front end surface of the front door plate (14).

9. A shelter for creating a low-temperature environment for target penetration by liquid nitrogen diffusion according to claim 1 or 2, characterized in that: The lower air inlet (29) is connected to the upper fan (26) via an internal duct of the side plate.

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