Variable-angle movable underwater pneumatic launching system capable of being installed outside box

Abstract

The utility model discloses a variable-angle movable underwater pneumatic launching system capable of being installed outside a box, which comprises an experimental water tank, a movable sealing cabin door is arranged on one side wall of the experimental water tank, a movable guide rail group is arranged in the middle of the inner bottom of the experimental water tank, and a damping system is arranged at one end of the movable guide rail group. One end of the bottom of the movable sealing cabin door is connected with the corresponding position of the movable guide rail group, and the other end of the bottom of the movable sealing cabin door is connected with a detachable external mounting platform; a traction driving system is further installed on one side of the outer portion of the experiment water tank, and a launching unit can walk on the rails of the movable guide rail set through a steel wire rope and a guide pulley set. The system can be used for carrying out underwater launching experiments at different launching angles and different launching speeds, and investigating parameters such as the load, the moving posture, the acceleration and the flow field of the projectile out of water.

Description

Technical Field

[0001] This utility model relates to the field of experimental equipment technology, and in particular to a variable-angle mobile underwater pneumatic launch system that can be installed outside the enclosure. Background Technology

[0002] To study the aerodynamic characteristics of projectiles emerging from the water while moving underwater, a variable-angle mobile underwater aerodynamic launch system that can be installed outside the test tank was designed. This system can be used to conduct underwater launch experiments at different launch angles and velocities, examining parameters such as the projectile's load, motion attitude, acceleration, and flow field upon exiting the water, and summarizing the influence of launch angle and velocity on the projectile's motion parameters during launch. Furthermore, for easier installation, the system allows for the installation of the launch unit and projectile outside the experimental water tank. The device utilizes the pressure energy of compressed air to convert it into the kinetic energy of a sabot, enabling the sabot to launch the projectile. The sabot drives the projectile, and a sabot interception device is installed at the launch tube exit to intercept the sabot, thus completing the individual launch of the projectile.

[0003] A review of relevant online literature revealed no related patents or papers, highlighting the novelty of this invention and its significant importance for fundamental research on projectile launch parameters. Modern underwater warfare environments are complex and ever-changing, requiring rapid and flexible engagement and defense against underwater targets. Traditional fixed launch systems struggle to meet these demands. This invention can support submarine-launched missile launch technology, promoting the development of underwater weaponry and enhancing national military competitiveness. Furthermore, the technology described in this patent can be applied to the launch and launch research of various functional projectiles to address multiple targets or enhance strike effectiveness, demonstrating significant practical value and long-term development potential. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a variable-angle mobile underwater pneumatic launch system that can be installed outside the box. This system can be used to carry out underwater launch experiments at different launch angles and launch speeds, examine parameters such as the load, motion attitude, acceleration, and flow field of the projectile after it leaves the water, and summarize the influence of launch angle and launch speed on the motion parameters during the projectile launch process.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a variable-angle mobile underwater pneumatic launch system that can be installed outside the tank, including an experimental water tank. A movable sealed door is provided on one side wall of the experimental water tank. A movable guide rail assembly is provided at the middle position of the bottom of the experimental water tank. One end of the movable guide rail assembly is provided with a damping system, and the other end is correspondingly provided with the movable sealed door. A mobile launch unit and a guide pulley assembly are installed on the guide rail. One bottom end of the movable sealed door is connected to the movable guide rail assembly at an appropriate position, and the other bottom end is connected to a detachable external mounting platform. The guide rail of the movable guide rail assembly can be flush with the guide rail on the external mounting platform, so that the two are connected. A traction drive system is also installed on the outside side of the experimental water tank. The traction drive system provides driving force for the launch unit and realizes the movement of the launch unit on the track of the movable guide rail assembly through steel wire rope and guide pulley assembly. A lighting system for illumination is also provided on the inner wall of the experimental water tank.

[0006] A further optimized technical solution is that the external mounting platform includes a connecting shaft, a buckle, an adapter groove, casters, and guide rails I. The bottom of the external mounting platform has four casters. The connecting shaft is installed in the middle of the buckle and can rotate around a fixed axis. The four corners of the buckle are connected to the adapter groove by screws. One side of the adapter groove can be aligned with the rectangular hatch on the right side of the experimental water tank. Two positioning blocks are located at the rectangular opening on the right side of the experimental water tank, which are connected to the connecting shaft and the buckle to connect the experimental water tank to the external mounting platform. Two guide rails I on the external mounting platform are connected to the upper surface of the adapter groove by screws. The movable guide rail assembly is close to the bottom of the experimental water tank, along the front-rear direction of the experimental water tank, facing the rectangular hatch on the front side of the experimental water tank, and can be aligned with the guide rails I on the external mounting platform. When the experimental water tank is connected to the external mounting platform, the movable guide rail assembly and the guide rails of the external mounting platform are also connected.

[0007] A further optimized technical solution involves a pipe flange at the top of the launching unit, which is connected to the pipe flange by screws. A shock-absorbing sealing ring is placed between the pipe flange and the pipe flange, and a BOPP waterproof membrane is placed between the shock-absorbing sealing ring and the pipe flange. The sleeve of the membrane is connected to the launching tube, and the connecting pipe is connected to the sleeve. A pressure cylinder and a top cover are installed on the outside of the launching tube, and a projectile and a projectile support are placed inside. The tube is placed on a top platform, and the top platform and the pressure cylinder are installed on a base. The pressure cylinder is connected to two large gear drive shafts on both sides and placed on two large gear support frames. One side of the large gear drive shaft is connected to the large gear through a multi-key. The large gear and the small gear I mesh. A waterproof motor drives the small gear I to rotate through the small gear rotating shaft, which in turn drives the large gear to rotate. The base plate is installed on four sliders, and the sliders are installed on the guide rail II of the moving guide rail assembly.

[0008] A further optimized technical solution is that the traction drive system consists of a gear shift box outside the experimental water tank body and a small gear II, a large gear I, a large gear II, a large gear III, a coupling II, a shift fork, a shift sleeve, a winch I, a winch II, a steel wire, a fixed pulley, a sealing assembly, and a support structure inside the tank body. The gear shift box contains a rotary motor and a stepper motor, as well as a support frame I for supporting the two motors, located inside the experimental water tank body. The support structure fixes the position of each gear. The rotary motor shaft and the shift fork shaft pass through the inside and outside of the experimental water tank body and are sealed by the sealing assembly and connected by the coupling II. The rotary motor shaft rotates together with the gear shaft of the small gear II to drive the small gear II to rotate. The small gear II meshes with the large gear II. The large gear I is coaxial with the large gear II and the large gear III, and has the same module and number of teeth. The stepper motor drives the shift fork to move back and forth along the axial direction. The shift fork is assembled with the shift sleeve and can also move back and forth along the axial direction. It is set to three fixed movement lengths. The shift sleeve has an internal gear. No matter which movement length the shift sleeve is in, the shift sleeve is always internally meshed with the large gear I. At the same time, the large gear II and the large gear III are respectively connected to the winch I and the winch II by keys.

[0009] A further optimized technical solution involves the guide pulley assembly being positioned on the lower side of the interior of the experimental water tank. Each fixed pulley has a pad underneath it, ensuring they are at the same height. A fixed block is mounted above the guide rail slider. Two positioning locking sliders, which engage with a clamping knob, are located below the fixed block. When the movable sealed door is opened, the clamping knob is loosened, allowing the positioning locking slider to be pulled out of the experimental water tank along guide rail II of the movable guide rail assembly to guide rail I on the external mounting platform. The positioning locking slider is then locked and fixed to the external mounting platform. Before the movable sealed door is closed, the clamping knob is loosened, and the positioning locking slider is pulled into a designated position inside the experimental water tank. The clamping knob is then tightened, and the guide pulley assembly uses the fixed pulleys to change the direction of the steel wire. The steel wire connects to the traction drive system and the launching unit, enabling the horizontal movement of the launching unit.

[0010] A further optimized technical solution is that the experimental water tank is cubic in shape, and the entire experimental water tank is welded from steel plates, longitudinal beams, transverse beams, and triangular support frames. There are two positioning blocks at the rectangular opening on the left side of the tank, which are connected to the external installation platform through connecting shafts and buckles to realize the connection between the experimental water tank and the external installation platform. The front of the tank is covered with plexiglass to realize the opening of the tank, which is conducive to high-speed camera shooting. Three flanges are set at the bottom of the tank. One gas pipe flange interface on the rear side of the tank is sealed to the gas transfer pipe inside the tank to connect the gas lines inside and outside the tank. The gas pipe flange interface on the left side of the tank serves as a spare interface, and the gas pipe flange on the right side of the tank is used to connect the circuit. The bottom of the top of the tank is covered with a wooden board to provide cushioning protection and prevent the projectile from damaging the iron plate on the top of the tank during the launch process.

[0011] A further optimized technical solution is that the damping system is located at the rear of the housing and on the inner side, and has hydraulic damping inside. When the bottom plate of the launching unit hits the pressure end of the damping system, the piston rod moves slowly backward. The damping system uses damping to provide resistance to the motion, dissipate the motion energy, decelerate the launching unit, and prevent hard impact between the launching unit and the housing.

[0012] A further optimized technical solution is that the lighting system includes six lights and their supporting structure. The lights shine obliquely upwards. One light is installed at each of the four corners of the lower part of the box, and one light is installed at each of the two corners of the upper part of the box near the left side. They are installed on the inner wall of the box to illuminate the inside of the box and to better observe and photograph the launch of the projectile.

[0013] A further optimized technical solution is that the movable sealed hatch can be moved forward, backward, left, and right relative to the hatch opening using channel steel and channel wheels, thereby moving the movable sealed hatch next to the tank door, thus achieving the sealing and opening of the experimental water tank.

[0014] The beneficial effects of adopting the above technical solution are as follows:

[0015] 1. By moving the transmitter unit outside the enclosure for installation, the tedious and troublesome installation process is avoided.

[0016] 2. The launch angle of the launching unit can be changed, thereby rotating the launching unit by a certain angle, which allows for the study of the effects of different tilt angles on various parameters of the projectile launched into the water.

[0017] 3. The launching unit can move along the guide rail inside the box. A shift box is installed outside the box, which contains a rotary motor and a stepper motor to control the operation of the winch and gears inside the box, realize the winding and unwinding of the steel wire, and pull the launching unit to move. It is possible to study the influence of different motion conditions on various parameters of the projectile launching into the water.

[0018] 4. The front of the container can be connected to an external installation platform. The hatch on the front of the container can move in a direction parallel to the surface of the container. After the hatch is moved open, the opening of the hatch can be connected to the external installation platform through two buckles. The guide rail inside the container is smoothly connected to the guide rail on the external installation platform, which can build a connecting platform connecting the inside and outside of the container.

[0019] 5. Equipped with a side hatch, external installation unit, guide pulley group, and moving guide rail group, the launch unit can be moved to the external installation platform outside the box for debugging and installation, avoiding the tediousness and trouble of the installation process, facilitating repeated tests, shortening the test time, and improving the test efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a rear view of the experimental water tank of this utility model;

[0022] Figure 3 This is an isometric view of the experimental water tank of this utility model;

[0023] Figure 4 This is a cross-sectional view of the experimental water tank of this utility model;

[0024] Figure 5 This is a schematic diagram of the movable sealed hatch structure of this utility model;

[0025] Figure 6 This is an isometric view of the transmitting unit of this utility model;

[0026] Figure 7 This is a right view of the transmitting unit of this utility model;

[0027] Figure 8 This is a cross-sectional view of the transmitting unit of this utility model;

[0028] Figure 9 This is a schematic diagram of the external mounting platform structure of this utility model;

[0029] Figure 10 This is a schematic diagram of the moving guide rail assembly structure of this utility model;

[0030] Figure 11 This is a schematic diagram of the damping system structure of this utility model;

[0031] Figure 12 This is an isometric drawing of the traction drive system of this utility model;

[0032] Figure 13 This is a cross-sectional view of the traction drive system of this utility model;

[0033] Figure 14 This is a schematic diagram of the guide pulley block structure of this utility model;

[0034] Figure 15 This is a schematic diagram of the guide pulley block structure of this utility model;

[0035] Figure 16 This is a schematic diagram of the lighting device structure of this utility model;

[0036] in,

[0037] 1. Experimental water tank;

[0038] 101. Angled support steel pipe; 102. Mounting hole; 103. Support steel pipe; 104. Adapter pipe; 105. Steel plate; 106. Acrylic glass; 107. Sealing frame; 108. Pressure strip; 109. Gas pipe flange interface; 110. Positioning block; 111. Screw; 112. Wooden block;

[0039] 2. Movable sealed hatch;

[0040] 201. Box door; 202. Front end of bracket; 203. Rear end of bracket; 204. Lifting guide rail; 205. Channel steel; 206. Joint; 207. Grooved wheel; 208. Pin; 209. Pad plate;

[0041] 3. Transmission unit;

[0042] 301. Pipe flange; 302. Connecting pipe; 303. Sleeve; 304. Top cover; 305. Pressure cylinder; 306. Base plate; 307. Motor bracket; 308. Waterproof motor; 309. Coupling I; 310. Pinion gear support frame; 311. Pinion I; 312. Pinion gear drive shaft; 313. Large gear; 314. Large gear drive shaft; 315. Launch tube; 316. Large gear support frame; 317. Base; 318. Slider; 319. Shock-absorbing sealing ring; 320. Projectile; 321. Projectile support; 322. Top platform; 323. Pipe flange; 324. BOPP waterproof membrane; 325. Hook;

[0043] 4. External mounting platform;

[0044] 401. Connecting shaft; 402. Buckle; 403. Adapter groove; 404. Fuma wheel; 405. Guide rail I;

[0045] 5. Moving guide rail assembly;

[0046] 501. Channel steel; 502. Guide rail II;

[0047] 6. Damping system;

[0048] 601. Cylinder block; 602. Piston rod; 603. Pressurized end;

[0049] 7. Traction drive system;

[0050] 701. Support beam; 702. Gear shift box; 703. Gear shift cover; 704. Rotary motor shaft; 705. Coupling II; 706. Shaft roller; 707. Winch I; 708. Gear shift fork; 709. Large gear II; 710. Large gear I; 711. Gear shift sleeve; 712. Large gear III; 713. Support body I; 714. Winch II; 715. Support plate; 716. Small gear II; 717. Support body II; 718. Support plate I; 719. Stepper motor; 720. Support frame I; 721. Rotary motor;

[0051] 8. Guide pulley block;

[0052] 801. Fixing block; 802. Fixed pulley; 803. Positioning and locking slider; 804. Pressing knob; 805. Pad block;

[0053] 9. Lighting system;

[0054] 901. Lighting lamp; 902. Support frame II; 903. Support plate II. Detailed Implementation

[0055] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0056] like Figure 1 As shown, this utility model discloses a variable-angle mobile underwater pneumatic launch system that can be installed outside the tank. It includes an experimental water tank 1, a movable sealed door 2 on one side wall of the experimental water tank 1, and a movable guide rail assembly 5 at the middle of the bottom of the experimental water tank 1. One end of the movable guide rail assembly 5 is equipped with a damping system 6, and the other end is correspondingly set with the movable sealed door 2. A mobile launch unit 3 and a guide pulley assembly 8 are installed on the guide rail. One bottom end of the movable sealed door 2 is connected to the movable guide rail assembly 5 at an appropriate position, and the other bottom end is connected to a detachable external mounting platform 4. The guide rail of the movable guide rail assembly 5 can be flush with the guide rail on the external mounting platform 4, so that the two are connected. A traction drive system 7 is also installed on the outside side of the experimental water tank 1. The traction drive system 7 provides driving force for the launch unit 3 and realizes the movement of the launch unit on the track of the movable guide rail assembly 5 through steel wire rope and guide pulley assembly 8. An illumination system 9 for illumination is also provided on the inner wall of the experimental water tank 1. The system is equipped with a side hatch, an external installation unit, a guide pulley group 8, and a moving guide rail group 5, which can move the launch unit 3 to the external installation platform 4 outside the box for debugging and installation. This avoids the tediousness and trouble of the installation process, facilitates repeated testing, shortens the test time, and improves the test efficiency.

[0057] like Figure 9 , 10As shown, the external mounting platform 4 specifically includes a connecting shaft 401, a buckle 402, an adapter groove 403, casters 404, and a guide rail I 405. The bottom of the external mounting platform 4 is provided with four casters 404. The connecting shaft 401 is installed in the middle of the buckle 402, allowing for fixed-axis rotation. The four corners of the buckle 402 are connected to the adapter groove 403 by screws. One side of the adapter groove 403 can be aligned with the rectangular hatch on the right side of the experimental water tank 1. Two positioning blocks 110 are located at the rectangular opening on the right side of the experimental water tank 1, which are connected to the connecting shaft 401. The rotating shaft 401 and the buckle 402 are connected to realize the connection between the experimental water tank 1 and the external mounting platform 4; the two guide rails I 405 on the external mounting platform 4 are connected to the upper surface of the adapter groove 403 by screws; the movable guide rail group 5 is close to the bottom of the experimental water tank 1, along the front and back direction of the experimental water tank 1, facing the rectangular hatch on the front side of the experimental water tank 1, and can be aligned with the guide rails I 405 on the external mounting platform 4. When the experimental water tank 1 is connected to the external mounting platform 4, the guide rails of the movable guide rail group 5 and the external mounting platform 4 are also connected.

[0058] like Figure 6 , 7 As shown in Figure 8, specifically, a pipe flange 301 is provided at the top of the launching unit 3. The pipe flange 301 is connected to the pipe flange 323 by screws. A shock-absorbing sealing ring 319 is provided between the pipe flange 301 and the pipe flange 323. A BOPP waterproof membrane 324 is placed between the shock-absorbing sealing ring 319 and the pipe flange 323. Its sleeve 303 is connected to the launching tube 315, and the connecting pipe 302 is connected to the sleeve 303. A pressure cylinder 305 and a top cover 304 are installed on the outside of the launching tube 315, and projectiles 320 and 321 are placed inside. It is placed on the top platform 322. The platform 322 and the pressure cylinder 305 are mounted on the base 317. The pressure cylinder 305 is connected to two large gear drive shafts 314 on both sides and placed on two large gear support frames 316. One side of the large gear drive shaft 314 is connected to the large gear via multiple keys. The large gear meshes with the small gear I 311. The waterproof motor 308 drives the small gear I 311 to rotate via the small gear rotation shaft, which in turn drives the large gear to rotate. The base plate 306 is mounted on four sliders 318, which are mounted on guide rail II 502 of the moving guide rail assembly 5. The launching unit 3 has a device for adjusting the underwater launching tube angle, which can realize the change of the launching tube angle and is used to investigate the influence of different launching angles on various parameters of the underwater launching of the projectile 320.

[0059] like Figure 12 , 13As shown, the traction drive system 7 specifically consists of a shift box 702 outside the experimental water tank 1 and a small gear II 716, a large gear I 710, a large gear II 709, a large gear III 712, a coupling II 705, a shift fork 708, a shift sleeve 711, a winch I 707, a winch II 714, a steel wire, a fixed pulley 802, a sealing assembly, and a support structure. The shift box 702 contains a rotary motor and a stepper motor 719, as well as a support frame I for supporting the two motors, located inside the experimental water tank 1. The support structure fixes the position of each gear. The shaft 704 of the rotary motor 721 and the shaft of the shift fork 708 pass through the inside and outside of the experimental water tank 1 and are sealed by the sealing assembly and connected by the coupling II 705. The rotary motor 721... Shaft 704 rotates together with the gear shaft of pinion II 716 to drive pinion II 716 to rotate. Pinion II 716 meshes with gear II 709. Gear I 710 is coaxial with gear II 709 and gear III 712, and has the same module and number of teeth. Stepper motor 719 drives shift fork 708 to move back and forth axially. Shift fork 708 is assembled with shift sleeve 711 and can also move back and forth axially. It is set to three fixed movement lengths. Shift sleeve 711 has an internal gear. Regardless of the movement length, shift sleeve 711 is always internally meshed with gear I 710. At the same time, gear II 709 and gear III 712 are respectively connected to winch I 707 and winch II 714 via keys. As the shift sleeve 711 moves axially in three lengths from short to long, it can engage and disengage with the large gears II 709 and III, thus achieving the following three states: ① Large gear II 709 is driven to rotate by large gear I 710, so winch I 707 rotates; large gear III 712 does not rotate, so winch II 714 does not rotate. ② Large gears II 709 and III do not rotate, so winches I 707 and II do not rotate. ③ Large gear II 709 does not rotate, so winch I 707 does not rotate; large gear III 712 is driven to rotate by large gear I 710, so winch II 714 rotates. A steel wire is wound around the winch, and the wire changes direction through the guide pulley system 8, ultimately connecting to the hooks 325 at both ends of the launching unit 3. The rotation of the winch causes the steel wire to be wound and unwound, thereby controlling the forward and backward movement of the launching unit 3 on the guide rail. The traction drive system 7 controls the stepper motor 719 to move the shift sleeve 711 back and forth, enabling different winches to be in working states. With the help of the guide pulley block 8, the steel wire is turned, pulling the launching unit 3 to move, thereby achieving underwater pneumatic launching at different horizontal moving speeds. The launching unit 3 can move horizontally at low speed along the guide rail inside the housing.A traction drive system 7 is installed inside and outside the housing. The traction drive system 7 contains a rotary motor 721 and a stepper motor 719, which control the operation of the winch and gears inside the housing. With the guidance of the guide pulley group 8, the steel wire tows the launching unit 3 to move horizontally along the guide rail. It can be used to observe the variation of various parameters of underwater launching of projectile 320 at different horizontal moving speeds.

[0060] like Figure 14 , 15 As shown, specifically, the guide pulley assembly 8 is located on the lower side of the interior of the experimental water tank 1. A pad 805 is provided below each fixed pulley 802 to ensure that all fixed pulleys 802 are at the same height. A fixing block 801 is installed above the guide rail slider 318. Two positioning locking sliders 803318 are provided below the fixing block 801, which cooperate with the clamping knob 804. When the movable sealed door 2 is opened, the clamping knob 804 is loosened, allowing the positioning locking sliders 803318 to be pulled out along the guide rail II 502 of the movable guide rail assembly 5. The test water tank 1 is connected to the guide rail I 405 on the external mounting platform 4, and the positioning locking slider 803318 is locked and fixed on the external mounting platform 4. Before the movable sealed door 2 is closed, the clamping knob 804 is loosened. After the positioning locking slider 803318 is pulled into the designated position inside the test water tank 1, the clamping knob 804 is tightened. The guide pulley group 8 uses the fixed pulley 802 to change the direction of the steel wire. The steel wire is connected to the traction drive system 7 and the launching unit 3 to realize the horizontal movement of the launching unit 3.

[0061] like Figure 2 , 3 As shown in Figure 4, the experimental water tank 1 is cubic in shape. The experimental water tank 1 is welded from steel plate 105, longitudinal beams, cross beams, and triangular support frame. There are two positioning blocks 110 at the rectangular opening on the left side of the tank. They are connected to the external mounting platform 4 by connecting shaft 401 and buckle 402. The experimental water tank is connected to the external mounting platform 4. The front of the tank is covered with plexiglass 106 to make the tank openable, which is convenient for high-speed camera shooting. Three flanges are provided at the bottom of the tank. One gas pipe flange 301 on the rear side of the tank is sealed to the gas transfer pipe 302103 inside the tank to connect the gas lines inside and outside the tank. The gas pipe flange 301 on the left side of the tank is used as a spare interface. The gas pipe flange 301 on the right side of the tank is used to connect the circuit part. The bottom of the top of the tank is covered with a wooden board to provide cushioning protection and prevent the projectile 320 from damaging the iron plate on the top of the tank during the launch process.

[0062] like Figure 11As shown, the damping system 6 is located at the rear of the housing and on the inner side. It has hydraulic damping inside. When the bottom plate 306 of the launching unit 3 hits the pressure end 603 of the damping system 6, the piston rod 602 moves slowly backward. The damping system 6 uses damping to provide resistance to the motion, reduce the motion energy, decelerate the launching unit 3, and prevent hard impact between the launching unit 3 and the housing.

[0063] like Figure 1 , 16 As shown, the lighting system 9 specifically includes six lighting lamps 901 and their supporting structure. The lighting lamps 901 illuminate obliquely upwards. One lighting lamp 901 is installed at each of the four corners of the lower part of the box, and one lighting lamp 901 is installed at each of the two corners of the upper part of the box near the left side. They are installed on the inner wall of the box to illuminate the inside of the box and to better observe and photograph the launch of the projectile 320.

[0064] like Figure 5 As shown, specifically, the movable sealed hatch 2 can move back and forth and left and right relative to the hatch opening via channel steel 205 and grooved wheels 207, thereby moving the movable sealed hatch 2 next to the hatch 201, thus achieving the sealing and opening of the experimental water tank. The hatch on the front side of the tank can move parallel to the tank surface. After the hatch is moved open, the hatch opening can be connected to the external mounting platform 4 outside the tank via two rotating shafts and buckles 402. The guide rail inside the tank is smoothly connected to the guide rail on the external mounting platform 4, which can build a connecting platform connecting the inside and outside of the tank. This allows the launch unit 3 to be moved out of the experimental water tank. The bottom of the external mounting platform 4 is equipped with heavy-duty casters 404, which have the function of mobile support.

Claims

1. A variable-angle mobile underwater pneumatic launch system that can be installed externally, characterized in that: The system includes an experimental water tank with a movable sealed door on one side wall. A movable guide rail assembly is located at the bottom center of the tank. One end of the guide rail assembly has a damping system, and the other end corresponds to the movable sealed door. A mobile launch unit and guide pulley assembly are mounted on the guide rails. One bottom end of the movable sealed door is connected to the movable guide rail assembly at a suitable position, and the other bottom end is connected to a detachable external mounting platform. The guide rails of the movable guide rail assembly can be flush with the guide rails on the external mounting platform, allowing them to communicate with each other. A traction drive system is also installed on the outside of the experimental water tank, providing driving force to the launch unit and enabling it to move along the track of the movable guide rail assembly via steel cables and guide pulleys. An illumination system is also installed on the inner wall of the experimental water tank.

2. The variable-angle mobile underwater pneumatic launch system that can be installed outside the enclosure according to claim 1, characterized in that: The external mounting platform includes a connecting shaft, a buckle, an adapter groove, casters, and guide rail I. Four casters are located at the bottom of the external mounting platform. The connecting shaft is installed in the middle of the buckle, allowing for fixed-axis rotation. The four corners of the buckle are connected to the adapter groove with screws. One side of the adapter groove can be aligned with the rectangular hatch on the right side of the experimental water tank. Two positioning blocks are located at the rectangular opening on the right side of the experimental water tank, which connect to the connecting shaft and the buckle, thus connecting the experimental water tank to the external mounting platform. Two guide rails I on the external mounting platform are connected to the upper surface of the adapter groove with screws. The movable guide rail assembly is flush against the bottom of the experimental water tank, running along the front-to-back direction of the tank, directly facing the rectangular hatch on the front side of the tank, and can be aligned with guide rail I on the external mounting platform. When the experimental water tank is connected to the external mounting platform, the movable guide rail assembly and the guide rails of the external mounting platform are also aligned.

3. The variable-angle mobile underwater pneumatic launch system that can be installed outside the enclosure according to claim 1, characterized in that: The launching unit is equipped with a pipe flange at the top, which is connected to the pipeline flange by screws. A shock-absorbing sealing ring is installed between the pipe flange and the pipeline flange. A BOPP waterproof membrane is placed between the shock-absorbing sealing ring and the pipeline flange. Its sleeve is connected to the launching tube, and the connecting pipe is connected to the sleeve. A pressure cylinder and a top cover are installed on the outside of the launching tube, and the projectile and projectile support are placed inside. It is placed on the top platform, and the top platform and pressure cylinder are installed on the base. The pressure cylinder is connected to two large gear drive shafts on both sides and is placed on two large gear support frames. One of the large gear drive shafts is connected to the large gear through a multi-key. The large gear and small gear I mesh. The waterproof motor drives the small gear I to rotate through the small gear rotating shaft, which in turn drives the large gear to rotate. The base plate is installed on four sliders, and the sliders are installed on the guide rail II of the moving guide rail assembly.

4. The variable-angle mobile underwater pneumatic launch system that can be installed outside the enclosure according to claim 1, characterized in that: The traction drive system consists of a gear shift box outside the experimental water tank and small gear II, large gear I, large gear II, large gear III, coupling II, shift fork, shift sleeve, winch I, winch II, steel wire, fixed pulley, sealing assembly, and support structure inside the tank. The gear shift box contains a rotary motor and a stepper motor, along with a support frame I for supporting the two motors, located inside the experimental water tank. The support structure fixes the position of each gear. The rotary motor shaft and the shift fork shaft pass through the inside and outside of the experimental water tank and are sealed by the sealing assembly, connected by coupling II. The rotating motor shaft of the rotating motor rotates together with the gear shaft of the small gear II, which drives the small gear II to rotate. The small gear II meshes with the large gear II. The large gear I is coaxial with the large gear II and the large gear III, and has the same module and number of teeth. The stepper motor is used to drive the shift fork to move back and forth along the axial direction. The shift fork is assembled with the shift sleeve and can move back and forth along the axial direction. It is set to three fixed movement lengths. The shift sleeve has an internal gear. No matter what movement length the shift sleeve is in, the shift sleeve is always meshed with the large gear I. At the same time, the large gear II and the large gear III are connected to the winch I and the winch II respectively by keys.

5. The variable-angle mobile underwater pneumatic launch system that can be installed outside the enclosure according to claim 1, characterized in that: The guide pulley assembly is located on the lower side of the interior of the experimental water tank. Each fixed pulley has a pad underneath it to ensure they are at the same height. A fixed block is mounted above the guide rail slider. Two positioning locking sliders are located below the fixed block and engage with a clamping knob. When the movable sealed door is opened, the clamping knob is loosened, allowing the positioning locking sliders to be pulled out of the experimental water tank along guide rail II of the movable guide rail assembly to guide rail I on the external mounting platform, where they are locked in place. Before the movable sealed door is closed, the clamping knob is loosened, and the positioning locking sliders are pulled into the designated position inside the experimental water tank before the clamping knob is tightened. The guide pulley assembly uses the fixed pulleys to change the direction of the steel wire, which is connected to the traction drive system and the launching unit, enabling the horizontal movement of the launching unit.

6. The variable-angle mobile underwater pneumatic launch system that can be installed outside the enclosure according to claim 1, characterized in that: The experimental water tank is cubic in shape and is constructed from welded steel plates, longitudinal beams, transverse beams, and triangular support frames. Two positioning blocks are located at the rectangular opening on the left side of the tank, connecting to the external mounting platform via a connecting shaft and clips. The front of the tank is fitted with plexiglass, creating a window for high-speed camera recording. Three flanges are located at the bottom of the tank. One gas pipe flange at the rear of the tank is sealed to the gas transfer pipe inside the tank, connecting the internal and external gas lines. The gas pipe flange on the left side serves as a spare interface, while the gas pipe flange on the right side is used to connect the electrical components. A wooden board is installed at the bottom of the top of the tank to provide cushioning and protection, preventing the projectile from damaging the iron plate on top of the tank during launch.

7. The variable-angle mobile underwater pneumatic launch system that can be installed outside the enclosure according to claim 1, characterized in that: The damping system is located at the rear of the housing and on the inner side. It contains hydraulic damping. When the base plate of the launch unit hits the pressure end of the damping system, the piston rod moves slowly backward. The damping system uses damping to provide resistance to the motion, reduce the motion energy, decelerate the launch unit, and prevent hard impact between the launch unit and the housing.

8. The variable-angle mobile underwater pneumatic launch system that can be installed outside the enclosure according to claim 1, characterized in that: The lighting system consists of six lights and their supporting structure. The lights shine obliquely upwards. One light is installed at each of the four corners of the lower part of the box, and another light is installed at each of the two corners of the upper part of the box near the left side. The lights are installed on the inner wall of the box to illuminate the inside of the box and to better observe and photograph the launch of the projectile.

9. The variable-angle mobile underwater pneumatic launch system that can be installed outside the enclosure according to claim 1, characterized in that: The movable sealed hatch can be moved forward, backward, left, and right relative to the hatch opening using channel steel and channel wheels, thereby moving the movable sealed hatch next to the tank door and thus achieving the sealing and opening of the experimental water tank.

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