Protective device for water-air cross-medium navigation body model test and use method

Abstract

The invention discloses a protection device for a water-air cross-medium navigation body model test and a use method. The protection device comprises a telescopic assembly, a moving assembly, a protection assembly and a control assembly. The telescopic assembly is of an inflation driving type structure, the top of the telescopic assembly is fixedly connected with the protection assembly, and the bottom is fixed to the moving assembly. The moving assembly is of a guide rail type transverse adjusting structure and is used for bearing and driving the telescopic assembly, the protection assembly and the control assembly to transversely move. The control assembly is integrated in the telescopic assembly and electrically connected with the pressure monitoring component and the execution component in the telescopic assembly. The protection assembly is fixed to the top of the telescopic assembly through a double-connection structure, and a longitudinal bearing mechanism of the moving assembly, the telescopic assembly and the protection assembly is formed. According to the device, protection of the navigation body in the water outlet aspect can be met, protection of the navigation body in the water inlet aspect can also be met, and meanwhile in the water inlet test, the underwater navigation body device can be rapidly fished through the lifting effect of the device.

Description

Technical Field

[0001] This invention relates to a protective device and its method of use, and more particularly to a protective device and its method of use for testing a water-air cross-medium navigation vehicle model. Background Technology

[0002] Currently, in model testing research on water-air cross-medium vehicles, whether in water exit or water entry tests, decompression is typically used to achieve cavitation number similarity in order to improve the accuracy of real-scale parameter predictions. The decompression environment requires strong sealing; currently, decompression tanks and pools are commonly used for model testing of water-air cross-medium vehicles. In water exit tests, the vehicle moves from underwater into the air. Due to its high initial kinetic energy, it maintains a high speed after exiting the water, making it highly susceptible to collision with the top wall of the decompression tank / pool. Similarly, in water entry tests, the vehicle moves from the air into the water and maintains a high speed after entering the water, thus also being prone to collision with the bottom wall of the decompression tank / pool.

[0003] Due to the complexity of the decompression experiment, the decompression process is lengthy. In the early stages of decompression, personnel are needed to set up protective facilities, increasing labor costs and reducing efficiency. To improve experimental efficiency and save manpower, protective devices can be installed during the decompression of the gas above the water surface. Furthermore, in the water entry test, the salvage device must also be highly efficient for rapid retrieval of the submerged vessel. Therefore, a highly efficient and effective protective device needs to be designed. This device will improve experimental efficiency, save manpower, and meet the rapid retrieval requirements of the water entry test. Simultaneously, it will ensure the structural safety of the vessel and decompression tanks / pools during the test, preventing direct collisions between the water-to-air cross-medium vessel and the walls of the decompression tanks / pools. Summary of the Invention

[0004] Purpose of the invention: This invention proposes a protective device and method for testing water-air cross-medium navigation models, which realizes automatic lifting and lateral position adjustment of the protective device, and takes into account both water exit / water entry two-way collision protection and rapid retrieval of water-entry models.

[0005] Technical solution: This invention includes a telescopic component, a moving component, a protective component, and a control component; the telescopic component is an inflatable driven structure, with its top fixedly connected to the protective component and its bottom fixed to the moving component; the moving component is a guide rail type lateral adjustment structure, used to support and drive the telescopic component, the protective component, and the control component to move laterally; the control component is integrated inside the telescopic component and is electrically connected to the pressure monitoring component and the actuating component inside the telescopic component; the protective component is fixed to the top of the telescopic component through a double connection structure, forming a longitudinal support mechanism of moving component-telescopic component-protective component.

[0006] The telescopic assembly includes an inflatable balloon, a sealing head, a telescopic rod, and a solenoid valve; the inflatable balloon is fixed and sealed to the sealing head, and a pressure sensor is installed inside the sealing head; the top of the solenoid valve is fixedly connected to the sealing head, and the bottom is connected to a gas storage cylinder and a vacuum pump respectively; the top of the telescopic rod is connected to a protective assembly, and the bottom is fixed to the gas storage cylinder.

[0007] The inflatable balloon has a flexible, sealed structure and is filled with a lightweight gas. The probe end of the pressure sensor extends into the sealed head and communicates with the internal space of the inflatable balloon.

[0008] The bottom of the solenoid valve is connected to the gas storage cylinder and the air pump via a venting hose.

[0009] The moving component includes a drive unit, a guide rail, and a connector; the guide rail is fixedly connected to the bottom plate of the test container, one end of the connector is fixed to the gas storage cylinder, and the other end is slidably engaged with the guide rail; the drive unit is installed at the end of the guide rail, and its output end is connected to the connector for transmission.

[0010] The protective assembly includes an elastic protective component and a connecting frame; the elastic protective component is fixedly connected to the connecting frame, and the connecting frame is simultaneously fixed to the top of the telescopic rod and the top of the solenoid valve, forming a double fixing structure.

[0011] The control components include a control module, a power supply component, and a protective housing; the control module and the power supply component are encapsulated within the protective housing, and the protective housing is fixedly connected to the middle of the telescopic rod and the top of the gas cylinder.

[0012] The control module is electrically connected to the pressure sensor, solenoid valve, air pump and drive unit respectively.

[0013] The connection points of the telescopic component, the moving component, the protective component, and the control component all adopt a detachable fixing structure.

[0014] A method for using a protective device for testing a water-air cross-medium navigation vehicle model includes the following steps:

[0015] (1) Installation and positioning of the device: Assemble each component according to the preset connection relationship, fix it in the test container, and adjust the lateral position of the protective component by moving the component;

[0016] (2) Preparation before the test: make the inflatable balloon in a deflated state, place the protective components in the preset initial position underwater, and seal the gas in the gas storage bottle;

[0017] (3) Water discharge test protection: Start the decompression process, simultaneously control the inflation of the telescopic component, and drive the protective component to float to the top of the test container and be in place;

[0018] (4) Water entry test protection and salvage: Adjust the protective components to be below the water entry trajectory. After the model enters the water, control the telescopic components to inflate, which will cause the protective components to float up and lift the model to the water surface;

[0019] (5) Reset after test: After the test, control the telescopic component to extract and recover the gas, so that the protective component retracts and returns to its original position, and move the device to the preset storage position by moving the component.

[0020] Beneficial effects: This invention has the following advantages:

[0021] This invention can provide protection for both the launch and entry of a vessel into the water. Furthermore, during the entry test, the device can be used to quickly retrieve the vessel into the water.

[0022] Driven by the buoyancy of an inflatable balloon and controlled by a PLC, the protective device can be automatically raised and lowered without manual intervention, meeting the sealing requirements of decompression environments and reducing labor costs.

[0023] It is simple to manufacture, has a reliable structure, and low manufacturing cost. The length of the telescopic device can be adjusted according to different size requirements of the test water tank to meet economic requirements. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0025] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0026] Figure 3 This is a schematic diagram of the structural assembly of the present invention;

[0027] Figure 4 This is a schematic diagram of the protective device of the present invention before testing;

[0028] Figure 5 This is a schematic diagram of the protective device of the present invention after testing. Detailed Implementation

[0029] The invention will now be further described with reference to the accompanying drawings.

[0030] Example 1

[0031] like Figures 1-5As shown, the protective device for the water-air cross-medium navigation vehicle model test in this embodiment includes a telescopic component 1, a moving component 2, a protective component 3, and a control component 4. The telescopic component 1 is an inflatable driven structure, with its top fixedly connected to the protective component 3 and its bottom detachably fixed to the moving component 2. The moving component 2 is a guide rail type lateral adjustment structure, used to support and drive the telescopic component 1, the protective component 3, and the control component 4 to move laterally. The control component 4 is integrated in the middle of the telescopic component 1 and is electrically connected to the pressure monitoring component and the actuator inside the telescopic component 1. The protective component 3 is fixed to the top of the telescopic component 1 through a double connection structure, forming a longitudinal bearing mechanism jointly driven by the moving component 2, the telescopic component 1, and the protective component 3.

[0032] The telescopic assembly 1 includes an inflatable balloon 5, a sealed head 6, a telescopic rod 10, a solenoid valve 8, a gas storage cylinder 13, a one-way valve 18, a ventilation hose 9, and a vacuum pump 12. The inflatable balloon 5 is fixed and sealed to the sealed head 6, and the inflatable balloon 5 has a flexible sealing structure filled with lightweight gas. A pressure sensor 7 is installed inside the sealed head 6, and the detection end of the pressure sensor 7 is connected to the internal space of the inflatable balloon 5. The top of the solenoid valve 8 is fixedly connected to the sealed head 6, and the bottom is connected to the gas storage cylinder 13 and the vacuum pump 12 respectively through the ventilation hose 9. The flexible ventilation hose is adapted to lifting and lowering movements to avoid damage to the pipeline due to pulling. A one-way valve 18 is installed between the gas storage cylinder 13 and the vacuum pump 12. The one-way valve 18, in conjunction with the vacuum pump 12, enables gas recovery and circulation, reducing operating costs. The top of the telescopic rod 10 is connected to the protective assembly 3, and the bottom is fixed to the gas storage cylinder 13. The telescopic rod 10 is driven to rise and fall by the buoyancy of the inflatable balloon 5, requiring no additional power source and adapting to the sealing requirements of depressurization environments.

[0033] The moving component 2 includes a motor 16, a guide rail 15, and a connecting plate 14. The guide rail 15 is fixedly connected to the bottom plate of the test container. One end of the connecting plate 14 is fixed to the gas cylinder 13, and the other end is slidably engaged with the guide rail 15. The motor 16 is installed at the end of the guide rail 15, and its output end is connected to the connecting plate 14 for transmission. This drives the protective component 3 to adjust its position flexibly in the lateral direction to adapt to different test trajectory requirements. The movement is smooth and the positioning is accurate. No manual intervention is required, which improves the efficiency of test preparation.

[0034] The protective component 3 includes a protective net 19 and a connecting frame 11. The protective net 19 is fixedly connected to the connecting frame 11, and the connecting frame 11 is simultaneously fixed to the top of the telescopic rod 10 and the top of the solenoid valve 8, forming a double-fixed structure. The protective net 19 can buffer and absorb energy to avoid rigid collision damage; the double-fixed structure improves load-bearing stability and ensures no displacement or detachment during impact, making it suitable for bidirectional protection scenarios.

[0035] The control component 3 includes a control module 17, a power supply battery, and a protective housing. The control module 17 and the power supply battery are encapsulated within the protective housing, which is fixedly connected to the middle of the telescopic rod 10 and the top of the gas cylinder 13. The control module 17 is electrically connected to the pressure sensor 7, the solenoid valve 8, the air pump 12, and the motor 16. The power supply battery is connected to each electrical component via wires, which pass through the sealed wiring holes in the protective housing. The control module 17 allows for real-time adjustment of the balloon's internal pressure, ensuring it remains stable and controllable, achieving closed-loop pressure control, and guaranteeing smooth lifting and precise positioning of the protective component. The protective housing is waterproof and dustproof, adaptable to the testing environment, and its sealed design ensures stable operation of the electrical components. The integrated installation enhances the compactness of the device.

[0036] In the initial stage of the experiment, the guide rail 15 was positioned according to the initial underwater launch position of the launch vehicle. During the experiment, the inflatable balloon 5 was initially empty, and the telescopic rod 10 was in a retracted state. By opening the solenoid valve 8, gas from the high-pressure gas cylinder was introduced into the inflatable balloon 5, causing it to inflate. Simultaneously, during the decompression process in the water tank, as the external environmental pressure gradually decreased, the balloon further inflated, its underwater buoyancy gradually increased, causing the telescopic rod 10 to extend. As the balloon further inflated, it floated to the surface of the water and, under the influence of low-density gas, detached from the water surface, moving the protective net 19 to the top of the decompression tank / pool. Due to the certain volume and elasticity of the inflatable balloon 5, the protective net 19 maintained a certain distance from the top wall of the decompression tank / pool, effectively preventing direct collision between the launched launch vehicle and the top wall.

[0037] After the test, control the solenoid valve 8 to draw the gas inside the inflatable balloon 5 into the gas storage bottle 13 through the air pump 12, causing the telescopic rod 10 to fall, and then adjust the position of the guide rail 15 to restore the device.

[0038] Similarly, in the water entry test, the protective net 19 is first deployed underwater, and the inflatable balloon 5 is empty. After the vehicle enters the water, in order to quickly retrieve it, the above steps can be repeated to raise the protective net 19 above the water surface to retrieve the vehicle, thus achieving high efficiency in the test.

[0039] Example 2

[0040] The method of using the protective device for water-air cross-medium vehicle model testing in this embodiment includes the following steps:

[0041] (1) Installation and positioning of the device: Assemble all components according to the preset connection relationship, fix them inside the test container, and adjust the lateral position of the protective components by moving the components. Specifically, this includes:

[0042] Assembly of the telescopic assembly: Pre-install the pressure sensor into the preset mounting hole of the cylindrical tube balloon sealing head, ensuring that the sensor detection end can directly monitor the internal pressure of the balloon. Then, seal the installation gap to prevent gas leakage. Secure the top of the solenoid valve to the bottom of the cylindrical tube balloon sealing head with bolts, ensuring that the outlet and inlet of the solenoid valve are precisely aligned with the internal channel of the sealing head. Fit the open end of the inflated balloon onto the connecting end of the cylindrical tube balloon sealing head and fix the two together in a sealed connection. Connect one end of the spring ventilation hose to the bottom interface of the solenoid valve, and the other end to the outlet of the gas cylinder and the inlet of the pump. Install a one-way valve on the connecting pipeline between the gas cylinder and the pump, ensuring that the conduction direction of the one-way valve is consistent with the gas recovery direction. Finally, fix the top of the telescopic rod to the reserved interface of the protective net connecting frame, and secure the bottom of the telescopic rod to the preset position on the top of the gas cylinder with bolts, completing the overall assembly of the telescopic assembly.

[0043] Assembly of the moving component: Cut the guide rail to the appropriate length according to the actual size of the test water tank / pool. Fix the guide rail parallel to the bottom plate of the test water tank / pool with expansion bolts, ensuring that the guide rail is installed flat, firm and without shaking. Fix one side of the connecting plate to the pre-set mounting seat at the bottom of the gas cylinder with bolts, and engage the other side with the sliding mechanism of the guide rail to ensure that the connecting plate can slide smoothly along the guide rail. Install the motor at one end of the guide rail, and connect the output shaft of the motor to the transmission mechanism of the guide rail through a coupling to ensure that the motor power can be stably transmitted to the connecting plate to realize the lateral movement drive of the telescopic component.

[0044] Assembly of protective components: Lay the elastic protective net flat, reserve installation holes on the edge of the protective net according to the size of the protective net connecting frame, and evenly tighten the protective net onto the protective net connecting frame with fixing bolts to ensure that the protective net is taut and not loose, so as to avoid affecting the collision buffering effect; fix the connected frame with the assembled protective net to the boss on the top of the solenoid valve and the connecting end on the top of the telescopic rod with bolts to ensure that the connecting frame is evenly stressed and the connection with the telescopic component is firm and reliable.

[0045] Assembly of control components: Place the PLC control module and power supply battery neatly inside the protective housing and fix them in place to prevent displacement of components due to shaking during the test; connect the signal lines of the solenoid valve, air pump, and pressure sensor to the input / output interface of the PLC control module, and connect the power supply battery to the power supply interface of each electrical component to complete the circuit connection; after sealing the wiring holes of the protective housing, fix the upper and lower ends of the protective housing to the middle of the telescopic rod and the top of the gas cylinder with bolts, so that the control components are integrated into the middle of the telescopic assembly, completing the assembly of the entire device.

[0046] (2) Preparation before the test: make the inflatable balloon in a deflated state, place the protective components in the preset initial position underwater, and seal the gas in the gas storage bottle;

[0047] (3) Water discharge test protection: Start the decompression process, and simultaneously control the inflation of the telescopic component to drive the protective component to float to the top of the test container and be in place.

[0048] The assembled and debugged device was installed in the test water tank. According to the preset water exit trajectory of the vehicle model, the protective component was adjusted to the initial position directly above the trajectory by moving the component. The decompression system of the decompression tank was activated to reduce the pressure in the tank at the decompression rate set for the test. At the same time, the inflation process of the telescopic component was started through the PLC control module. The floating process of the protective component was monitored in real time to confirm that it could float synchronously with the decompression process and finally stay stably at the top of the tank, maintaining a preset safe distance from the top wall. The water exit test of the vehicle model was started, and the model was made to exit the water at a preset speed. The collision process between the model and the protective net was observed to verify the buffering and energy absorption effect of the elastic protective net, ensuring that the model was not damaged after the collision and did not directly contact the top wall of the tank, thus completing the verification of the water exit protection function.

[0049] (4) Water entry test protection and salvage: Adjust the protective components to be below the water entry trajectory. After the model enters the water, control the telescopic components to inflate, which will cause the protective components to float up and lift the model to the water surface.

[0050] The protective component is moved to the initial underwater position below the preset water entry trajectory of the model by the moving component, while the telescopic rod remains retracted. The water entry test of the model is initiated, allowing the model to enter the water from a preset height. After the model enters the water, the solenoid valve is immediately activated by the PLC control module to control the inflation of the air balloon. The ascent process of the protective component is recorded in real time to observe whether the protective component can accurately lift the model after it enters the water. The time from the model entering the water to being lifted to the surface is measured to verify the effectiveness of the rapid retrieval function. At the same time, it is observed whether there is any collision with the protective net during the model's entry into the water to verify the anti-collision protection effect of the protective net on the model entering the water and to ensure that the model has no direct contact with the bottom wall of the water tank.

[0051] (5) Reset after test: After the test, control the telescopic component to extract and recover the gas, so that the protective component retracts and returns to its original position, and move the device to the preset storage position by moving the component.

Claims

1. A protective device for testing a water-air cross-medium navigation vehicle model, characterized in that, It includes a telescopic component, a moving component, a protective component, and a control component; the telescopic component is an inflatable driven structure, with its top fixedly connected to the protective component and its bottom fixed to the moving component; the moving component is a guide rail type lateral adjustment structure, used to support and drive the telescopic component, the protective component, and the control component to move laterally; the control component is integrated inside the telescopic component and is electrically connected to the pressure monitoring component and the actuating component inside the telescopic component; the protective component is fixed to the top of the telescopic component through a double connection structure, forming a longitudinal support mechanism of moving component-telescopic component-protective component.

2. The protective device for water-air cross-medium vehicle model testing according to claim 1, characterized in that, The telescopic assembly includes an inflatable balloon, a sealing head, a telescopic rod, and a solenoid valve; the inflatable balloon is fixed and sealed to the sealing head, and a pressure sensor is installed inside the sealing head; the top of the solenoid valve is fixedly connected to the sealing head, and the bottom is connected to a gas storage cylinder and a vacuum pump respectively; the top of the telescopic rod is connected to a protective assembly, and the bottom is fixed to the gas storage cylinder.

3. The protective device for water-air cross-medium navigation model testing according to claim 2, characterized in that, The inflatable balloon has a flexible, sealed structure and is filled with a lightweight gas. The probe end of the pressure sensor extends into the sealed head and communicates with the internal space of the inflatable balloon.

4. The protective device for water-air cross-medium navigation model testing according to claim 2, characterized in that, The bottom of the solenoid valve is connected to the gas storage cylinder and the air pump via a venting hose.

5. The protective device for water-air cross-medium navigation model testing according to claim 1, characterized in that, The moving component includes a drive unit, a guide rail, and a connector; the guide rail is fixedly connected to the bottom plate of the test container, one end of the connector is fixed to the gas storage cylinder, and the other end is slidably engaged with the guide rail; the drive unit is installed at the end of the guide rail, and its output end is connected to the connector for transmission.

6. The protective device for water-air cross-medium vehicle model testing according to claim 1, characterized in that, The protective assembly includes an elastic protective component and a connecting frame; the elastic protective component is fixedly connected to the connecting frame, and the connecting frame is simultaneously fixed to the top of the telescopic rod and the top of the solenoid valve, forming a double fixing structure.

7. The protective device for water-air cross-medium vehicle model testing according to claim 1, characterized in that, The control components include a control module, a power supply component, and a protective housing; the control module and the power supply component are encapsulated within the protective housing, and the protective housing is fixedly connected to the middle of the telescopic rod and the top of the gas cylinder.

8. The protective device for water-air cross-medium navigation model testing according to claim 7, characterized in that, The control module is electrically connected to the pressure sensor, solenoid valve, air pump and drive unit respectively.

9. The protective device for water-air cross-medium navigation model testing according to claim 1, characterized in that, The connection points of the telescopic component, the moving component, the protective component, and the control component all adopt a detachable fixing structure.

10. A method of using a protective device for a water-air cross-medium vehicle model test based on any one of claims 1-9, characterized in that, Includes the following steps: (1) Installation and positioning of the device: Assemble each component according to the preset connection relationship, fix it in the test container, and adjust the lateral position of the protective component by moving the component; (2) Preparation before the test: make the inflatable balloon in a deflated state, place the protective components in the preset initial position underwater, and seal the gas in the gas storage bottle; (3) Water discharge test protection: Start the decompression process, simultaneously control the inflation of the telescopic component, and drive the protective component to float to the top of the test container and be in place; (4) Water entry test protection and salvage: Adjust the protective components to be below the water entry trajectory. After the model enters the water, control the telescopic components to inflate, which will cause the protective components to float up and lift the model to the water surface; (5) Reset after test: After the test, control the telescopic component to extract and recover the gas, so that the protective component retracts and returns to its original position, and move the device to the preset storage position by moving the component.

Images