An underwater ejection experimental device for multi-scale experiments

Abstract

The present invention proposes an underwater ejection experimental device for multi-scale ratio experiments, which belongs to the field of underwater ejection experiments. The invention solves the problem that the experimental device cannot carry out multi-scale ratio experiments and the first-level accuracy and repeatability cannot be guaranteed. It includes a base, on which a plurality of mounting holes are arranged, each mounting hole is used to install experimental modules with different scale ratios; the experimental module includes: a gas delivery module, connected to the mounting holes at corresponding positions; a high-pressure gas cylinder module, connected to the inlet end of the gas delivery module; and a launch tube module, connected to the outlet end of the gas delivery module for receiving the high-pressure gas launch projectile output by the high-pressure gas cylinder module; the launch tube module includes a launch tube, a sealing ring, a limiting ring, an air chamber, an air inlet and a drain, an air chamber is formed between the limiting ring and the bottom wall of the launch tube, and the air chamber is connected to the gas delivery module through the air inlet on the side wall of the launch tube. It is mainly used for underwater ejection experiments with multiple scale ratios.

Description

Technical Field

[0001] The invention belongs to the field of underwater ejection experiments, and in particular relates to an underwater ejection experiment device used for multi-scale ratio experiments. Background Art

[0002] Model experiments are an important method for studying the emergence of a navigation body from water. In order to simulate the process of a navigation body from launch to emergence from water, a considerable number of experimental devices use high-pressure gas ejection methods to accelerate the model. However, since the theory of scaled model experiments is not yet perfect and the similarity mechanism is still unclear, the experimental results often have similarity distortions, and the experimental phenomena are quite different from the prototypes. In order to clarify the similarity laws of underwater launch model experiments and carry out similarity compensation, experiments with different scale ratios need to be carried out.

[0003] In order to better meet the cavitation similarity in underwater launch problems, decompression experiments need to be carried out. In traditional designs, decompression is generally not considered, because many ejection devices are operated by dragging pipes, that is, the launch tube is directly connected to the external high-pressure gas source. Under decompression experimental conditions, dragging pipe movement is extremely inconvenient, so built-in high-pressure gas cylinders are a very good solution. In addition, accurately controlling the ejection pressure to ensure that the experimental parameters are controllable is also an important experimental technology.

[0004] The existing device cannot replace the launch tube module and launch cylinder module of different sizes to carry out model experiments at different scale ratios. At the same time, the existing device cannot accurately measure and control the pressure in the launch cylinder, and the repeatability of the experiment cannot be effectively guaranteed. The existing device does not design an accurate gas chamber, which reduces the launch accuracy. Summary of the invention

[0005] In view of this, the present invention aims to propose an underwater ejection experimental device for multi-scale ratio experiments to solve the problem that the experimental device cannot perform multi-scale ratio experiments and the first-level accuracy and repeatability cannot be guaranteed.

[0006] To achieve the above object, the present invention adopts the following technical solution: an underwater ejection experimental device for multi-scale ratio experiments, comprising:

[0007] A base is provided with a plurality of mounting holes, each of which is used to mount an experimental module with a different scale ratio; the experimental module comprises:

[0008] A gas delivery module connected to the mounting hole at a corresponding position;

[0009] a high-pressure gas cylinder module connected to the inlet end of the gas delivery module; and

[0010] A launching tube module, connected to the outlet end of the gas delivery module and used to receive the high-pressure gas launching projectile outputted by the high-pressure gas cylinder module;

[0011] The launching tube module comprises a launching tube, a sealing ring, a limiting ring, an air chamber, an air inlet and a drain port. A plurality of sealing rings are arranged in the launching tube at equal intervals along the axial direction. A limiting ring is provided on the side of the launching tube away from the launching port. An air chamber is formed between the limiting ring and the bottom wall of the launching tube. The air chamber is connected to the gas delivery module through the air inlet on the side wall of the launching tube. The drain port is provided at the bottom of the launching tube and communicated with the inside of the launching tube.

[0012] Furthermore, the high-pressure gas cylinder module includes a charging valve, a charging port, a high-pressure gas cylinder and a gas outlet, the high-pressure gas cylinder is provided with a charging port and a gas outlet, and the charging port is provided with a charging valve. The charging valve can replenish gas for the high-pressure gas cylinder.

[0013] Furthermore, the gas delivery module includes a watertight shell, a gas delivery module air outlet interface, a first gas pipeline, a solenoid valve, a second gas pipeline and a gas delivery pipeline port, the watertight shell is connected to the mounting holes at corresponding positions, the solenoid valve is arranged in the watertight shell, one end of the solenoid valve is connected to the air outlet through the second gas pipeline, the other end of the solenoid valve is provided with a first gas pipeline and a gas delivery module air outlet interface is provided at the end where the first gas pipeline passes through the watertight shell, and the gas delivery module air outlet interface is connected to the air inlet.

[0014] Furthermore, an air inlet interface, a watertight plug, a second flange base and a slot are provided on the watertight casing, the second gas pipeline is connected to the inner side of the air inlet interface through the gas delivery pipeline port, the outer side of the air inlet interface is connected to the air outlet, and the launching tube is connected to the second flange base.

[0015] Furthermore, the air outlet is connected to the air inlet interface via a second bolt.

[0016] Furthermore, two watertight header caps are threadedly connected to the first gas pipeline, and the two watertight header caps are respectively abutted against the inner and outer sides of the side wall of the watertight outer shell.

[0017] Furthermore, the launching tube is connected to the second flange base via the first flange base.

[0018] Furthermore, the first flange base is connected to the second flange base via a first bolt.

[0019] Furthermore, the watertight housing is engaged in the mounting hole through a slot.

[0020] Furthermore, the base includes an outer frame, and a plurality of the mounting holes are arranged at intervals on the outer frame.

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

[0022] 1. This device can be used under reduced pressure, low-temperature water, and ice cover. The high-pressure gas cylinder is built-in to avoid opening holes in the closed experimental pool. A barometer is used to accurately measure the outlet pressure of the high-pressure gas cylinder to ensure the repeatability of the experiment and accurate launch conditions. An air filling port is set on the top of the high-pressure gas cylinder to quickly store gas and improve experimental efficiency. The launch pressure can be controlled according to specific speed requirements and ice breaking needs;

[0023] 2. This device can adopt modular design according to the requirements of the scale ratio, and replace experimental modules of different sizes. By carrying out ejection experiments under different scale ratios, similar problems in model scale reduction can be effectively studied;

[0024] 3. An air chamber is set at the bottom of the launch tube of this device, and the size of the air chamber is determined according to the design parameters. The air inlet is set on the side wall of the air chamber to simulate the prototype intake state, which can simulate the gas flow state under real launch conditions, thereby controlling the influencing factors in the ejection experiment; at the same time, the side air supply can reduce the axial size of the ejection device, which is convenient for debugging and maintenance of vulnerable parts;

[0025] 4. A drain port is set at the bottom of the launch tube of this device. During normal pressure experiments, after an experiment, the water in the launch tube and the air pipe connected to the launch tube can be quickly drained to achieve rapid loading of the model; this can greatly facilitate the model loading operation and improve the efficiency of the experiment; at the same time, in order to adapt to the ejection experiment under decompression conditions, the drain port can be connected to the exhaust pipe. When conducting a decompression experiment, the exhaust pipe is connected to the drain port to the outside of the water tank. When the experimental water tank is decompressed, the gas inside the launch tube is discharged through the exhaust pipe to prevent the residual gas in the tube from pushing the projectile out of the tube and affecting the experiment;

[0026] 5. The solenoid valve uses a high-speed pneumatic solenoid valve that can control the ventilation time to simulate the ventilation time of gas ejection. The solenoid valve can be opened after receiving the launch signal and closed after the projectile model leaves the tube. The gas delivery module can effectively simulate the launch conditions in real situations;

[0027] 6. Different from the conventional drag-tube gas-ejection test, this device uses a built-in high-pressure gas cylinder to provide the ejection gas source, avoiding the need to drag the tube during the experiment. The on-body high-pressure gas cylinder module can shorten the length of the ventilation pipeline to the greatest extent, reduce the ventilation loss along the way caused by the long tube, and improve the response speed of high-pressure gas ejection. In conjunction with the gas chamber set on the launch tube, the scale requirements of the gas initial volume chamber in the real launch tube can be restored. At the same time, the gas supply method of the on-body high-pressure gas cylinder module avoids the need for pipelines to penetrate the cabin, and can better adapt to the decompression experimental conditions; the inflation port and inflation valve are set at the top of the gas cylinder to realize the rapid replenishment of high-pressure gas, thereby improving the experimental efficiency;

[0028] 7. This set of experimental equipment can simulate complex launch conditions such as time sequence launch and launch at different relative positions. The modular design of the launch tube can switch the launch state freely and conveniently.

[0029] 8. Set sealing rings with adjustable quantity and friction coefficient in the launch tube to adjust the corresponding relationship between ejection pressure and friction force of exiting the tube, finely adjust the exit speed, tube mouth pressure difference, ejection gas volume, gas volume of the tail cavitation, and underwater launch movement characteristics of the navigation body, and further accurately simulate the gas-liquid two-phase flow, projectile kinematics and other characteristics of the prototype during the exit process. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0031] Figure 1 It is a structural schematic diagram of an underwater ejection experimental device for multi-scale ratio experiments according to the present invention;

[0032] Figure 2 It is a structural schematic diagram of the launch tube module of the present invention;

[0033] Figure 3 It is a side view of the launch tube module of the present invention;

[0034] Figure 4 This is a schematic structural diagram of the high-pressure gas cylinder module of the present invention;

[0035] Figure 5 It is a structural schematic diagram of the gas delivery module of the present invention;

[0036] Figure 6 A schematic diagram of the connection relationship of the solenoid valve of the present invention;

[0037] Figure 7 A top view of the base according to the present invention;

[0038] Figure 8 This is a diagram of the combined state of the experimental modules with different multi-scale ratios according to the present invention installed on a base.

[0039] Launch tube module 1; launch tube 1-1; sealing ring 1-2; limiting ring 1-3; air chamber 1-4; first flange base 1-5; air inlet 1-6; first bolt 1-7; drain outlet 1-8; high-pressure gas cylinder module 2; charging valve 2-1; charging port 2-2; high-pressure gas cylinder 2-3; air outlet 2-4; second bolt 2-5; gas delivery module 3; watertight shell 3-1; air inlet interface 3-2; watertight plug 3-3; gas delivery module air outlet interface 3-4; second flange base 3-5; card slot 3-6; first gas pipeline 3-7; watertight head cap 3-8; solenoid valve 3-9; second gas pipeline 3-10; gas delivery pipeline port 3-11; base 4; outer frame 4-1; mounting hole 4-2. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely explain the technical solutions in the embodiments of the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict, and the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0041] Referring to the accompanying drawings, this embodiment is described, an underwater ejection experiment device for multi-scale ratio experiments, comprising:

[0042] The base 4 is provided with a plurality of mounting holes 4-2, each of which is used to mount experimental modules of different scale ratios. For the sake of overall neatness and aesthetics, the mounting holes 4-2 can be arranged at equal intervals. At the same time, this arrangement can simulate complex launch conditions such as sequential launch and launch at different relative positions. The modular design of the launch tube can freely and conveniently switch the launch state. The experimental module includes:

[0043] The gas delivery module 3 is connected to the mounting hole 4-2 at the corresponding position;

[0044] A high-pressure gas cylinder module 2 connected to the inlet end of the gas delivery module 3; and

[0045] A launching tube module 1, connected to the outlet end of the gas delivery module 3, and used for receiving the high-pressure gas launching projectile outputted by the high-pressure gas cylinder module 2;

[0046] The launching tube module 1 comprises a launching tube 1-1, a sealing ring 1-2, a limiting ring 1-3, an air chamber 1-4, an air inlet 1-6 and a drain 1-8. A plurality of sealing rings 1-2 are arranged in the launching tube 1-1 at equal intervals along the axial direction. A limiting ring 1-3 is provided on the side of the launching tube 1-1 away from the launching port. An air chamber 1-4 is formed between the limiting ring 1-3 and the bottom wall of the launching tube 1-1. The air chamber 1-4 is connected to the gas delivery module 3 through the air inlet 1-6 on the side wall of the launching tube 1-1. The drain 1-8 is provided at the bottom of the launching tube 1-1 and communicated with the inside of the launching tube 1-1.

[0047] In this embodiment, two sealing rings 1-2 are provided from top to bottom, and the sealing ring 1-2 and the launch tube 1-1 are installed in an interference fit manner to achieve a sealing function. The inner diameter of the limit ring 1-3 is 2 mm smaller than the diameter of the projectile and is made of metal. The position of the air inlet 1-6 is located at half the height of the air chamber 1-4. The launch tube 1-1 is made of aluminum alloy as a whole, and the surface is coated with anti-rust paint.

[0048] In this embodiment, the high-pressure gas cylinder module 2 includes a charging valve 2-1, a charging port 2-2, a high-pressure gas cylinder 2-3 and a gas outlet 2-4. The high-pressure gas cylinder 2-3 is provided with a charging port 2-2 and a gas outlet 2-4, and the charging port 2-2 is provided with a charging valve 2-1. The setting of the charging valve 2-1 can control the opening and closing of the charging port 2-2, so that when the high-pressure gas cylinder 2-3 needs to be charged, the high-pressure gas cylinder 2-3 is discharged through the charging valve 2-1.

[0049] In this embodiment, the gas delivery module 3 includes a watertight shell 3-1, a gas delivery module outlet interface 3-4, a first gas pipeline 3-7, a solenoid valve 3-9, a second gas pipeline 3-10 and a gas delivery pipeline port 3-11, the watertight shell 3-1 is connected to the mounting hole 4-2 at the corresponding position, the solenoid valve 3-9 is arranged in the watertight shell 3-1, one end of the solenoid valve 3-9 is connected to the outlet 2-4 through the second gas pipeline 3-10, the other end of the solenoid valve 3-9 is provided with a first gas pipeline 3-7 and a gas delivery module outlet interface 3-4 is arranged at the end of the first gas pipeline 3-7 passing through the watertight shell 3-1, and the gas delivery module outlet interface 3-4 is connected to the air inlet 1-6. The setting of the solenoid valve 3-9 can control whether the high-pressure gas of the high-pressure gas cylinder 2-3 is output to the outside, and by setting a barometer at the outlet of the high-pressure gas cylinder 2-3, the outlet pressure of the high-pressure gas cylinder 2-3 can be monitored, thereby ensuring the repeatability of the experiment and the precise launch conditions. The first gas pipeline 3-7 and the second gas pipeline 3-10 are connected to the corresponding parts by means of threads and rubber washers at the connection ports, which can ensure airtightness while ensuring simple and reliable connection.

[0050] In this embodiment, the watertight shell 3-1 is provided with an air inlet interface 3-2, a watertight plug 3-3, a second flange base 3-5 and a card slot 3-6, the second gas pipeline 3-10 is connected to the inner side of the air inlet interface 3-2 through the gas delivery pipeline port 3-11, the outer side of the air inlet interface 3-2 is connected to the gas outlet 2-4, and the launch tube 1-1 is connected to the second flange base 3-5. The provision of the watertight plug 3-3 enables the watertight plug 3-3 to ensure good sealing when the cable of the control solenoid valve 3-9 is inserted into the watertight shell 3-1, and the card slot 3-6 can be engaged with the mounting hole 4-2 to enable the watertight shell 3-1 to be quickly installed and disassembled.

[0051] In this embodiment, the air outlet 2-4 is connected to the air inlet interface 3-2 by a second bolt 2-5. The connection method is simple and reliable, easy to disassemble and assemble repeatedly, and convenient for conducting experiments with different scale ratios.

[0052] In this embodiment, two watertight caps 3-8 are threadedly connected to the first gas pipeline 3-7, and the two watertight caps 3-8 are respectively abutted against the inner and outer sides of the side wall of the watertight shell 3-1. The watertight caps 3-8 can be reliably moved on the first gas pipeline 3-7 by threaded connection, and can achieve a sealing effect by being attached to the inner and outer sides of the side wall of the watertight shell 3-1.

[0053] In this embodiment, the launching tube 1-1 is connected to the second flange base 3-5 via the first flange base 1-5.

[0054] In this embodiment, the first flange base 1-5 is connected to the second flange base 3-5 by a first bolt 1-7. The connection method is simple and reliable, and is easy to perform repeatable experiments.

[0055] In this embodiment, the watertight housing 3-1 is engaged in the mounting hole 4-2 through the engagement slot 3-6. The engagement of the engagement slot 3-6 can improve the convenience of installation, so that when conducting experiments with multiple scale ratios, installation and disassembly can be performed quickly, achieving the purpose of convenient use.

[0056] In this embodiment, the base 4 includes an outer frame 4-1, and a plurality of mounting holes 4-2 are arranged at intervals on the outer frame 4-1. The arrangement of the mounting holes 4-2 can provide an installation position for the experimental module, so as to facilitate the installation of experimental modules with different scale ratios to conduct corresponding experiments and achieve the purpose of simulating real usage conditions.

[0057] When in use, by installing the experimental modules with different scale ratios in different mounting holes 4-2 and conducting ejection experiments under different scale ratios, similar problems in model scale reduction can be effectively studied. The different scale ratios are achieved by replacing different launch tube 1-1 sizes.

[0058] High-pressure gas is supplied through the high-pressure gas cylinder 2-3, and by controlling the opening and closing of the solenoid valve 3-9, the high-pressure gas is ejected through the gas outlet 2-4, and then enters the gas chamber 1-4 through the gas delivery module outlet interface 3-4 and the gas inlet 1-6 after passing through the second gas pipeline 3-10, the control solenoid valve 3-9, and the first gas pipeline 3-7, so that the model loaded into the launch tube 1-1 is smoothly ejected. By setting the number and friction coefficient of the sealing ring 1-2, the corresponding relationship between the ejection pressure and the friction force of the tube is adjusted, and the exit speed, the exit tube mouth pressure difference, the exit tube ejection gas volume, the exit tube tail cavitation gas carrying volume and the underwater launch water movement characteristics of the navigation body are finely adjusted to further accurately simulate the gas-liquid two-phase flow, projectile kinematics and other characteristics of the prototype during the exit tube process. Through the cooperation of the limit ring 1-3 and the launch tube 1-1, a stable air chamber 1-4 with a certain volume can be formed, and by arranging an air inlet 1-6 on the side wall of the launch tube 1-1 and the air inlet 1-6 being located at half the vertical height of the air chamber 1-4, the prototype intake state can be simulated, and the gas flow state under real launch conditions can be simulated, so as to control the influencing factors in the ejection experiment; at the same time, the use of lateral air supply can reduce the axial size of the ejection device, which is convenient for debugging and maintenance of wearing parts.

[0059] The controllers, sensors and control programs that may be involved in the above description are all existing technologies and will not be described in detail here.

[0060] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. According to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well.

Claims

1. An underwater ejection test device for multi-scale ratio experiments, characterized in that: include: A base (4) is provided with a plurality of mounting holes (4-2), each of the mounting holes (4-2) being used to mount experimental modules with different scale ratios; the experimental modules comprising: A gas delivery module (3) connected to the mounting hole (4-2) at a corresponding position; A high-pressure gas cylinder module (2) connected to the inlet end of the gas delivery module (3); and A launching tube module (1) connected to the outlet end of the gas delivery module (3) for receiving the high-pressure gas launching projectile outputted by the high-pressure gas cylinder module (2); The launch tube module (1) comprises a launch tube (1-1), a sealing ring (1-2), a limiting ring (1-3), an air chamber (1-4), an air inlet (1-6) and a water outlet (1-8); a plurality of sealing rings (1-2) are arranged in the launch tube (1-1) at equal intervals along the axial direction; a limiting ring (1-3) is arranged on the side of the launch tube (1-1) away from the launch port; an air chamber (1-4) is formed between the limiting ring (1-3) and the bottom wall of the launch tube (1-1); the air chamber (1-4) and the gas delivery module (3) are connected via the air inlet (1-6) on the side wall of the launch tube (1-1); and the water outlet (1-8) is arranged at the bottom of the launch tube (1-1) and communicated with the inside of the launch tube (1-1); The high-pressure gas cylinder module (2) comprises a charging valve (2-1), a charging port (2-2), a high-pressure gas cylinder (2-3) and a gas outlet (2-4); the charging port (2-2) and the gas outlet (2-4) are arranged on the high-pressure gas cylinder (2-3); and the charging valve (2-1) is arranged at the charging port (2-2); The gas delivery module (3) comprises a watertight shell (3-1), a gas delivery module gas outlet interface (3-4), a first gas pipeline (3-7), a solenoid valve (3-9), a second gas pipeline (3-10) and a gas delivery pipeline port (3-11); the watertight shell (3-1) is connected to a mounting hole (4-2) at a corresponding position; the solenoid valve (3-9) is arranged in the watertight shell (3-1); one end of the solenoid valve (3-9) is connected to the gas outlet (2-4) via the second gas pipeline (3-10); the other end of the solenoid valve (3-9) is provided with a first gas pipeline (3-7); and a gas delivery module gas outlet interface (3-4) is provided at the end of the first gas pipeline (3-7) passing through the watertight shell (3-1); the gas delivery module gas outlet interface (3-4) is connected to the gas inlet (1-6).

2. The underwater ejection experiment device for multi-scale ratio experiments according to claim 1, characterized in that: The watertight shell (3-1) is provided with an air inlet interface (3-2), a watertight plug (3-3), a second flange base (3-5) and a slot (3-6); the second gas pipeline (3-10) is connected to the inner side of the air inlet interface (3-2) through a gas delivery pipeline port (3-11); the outer side of the air inlet interface (3-2) is connected to the air outlet (2-4); and the launch tube (1-1) is connected to the second flange base (3-5).

3. The underwater ejection experiment device for multi-scale ratio experiments according to claim 2, characterized in that: The air outlet (2-4) is connected to the air inlet interface (3-2) via a second bolt (2-5).

4. The underwater ejection experiment device for multi-scale ratio experiments according to claim 2, characterized in that: Two watertight header caps (3-8) are threadedly connected to the first gas pipeline (3-7), and the two watertight header caps (3-8) are respectively abutted against the inner and outer sides of the side wall of the watertight outer shell (3-1).

5. The underwater ejection experiment device for multi-scale ratio experiments according to claim 2, characterized in that: The launching tube (1-1) is connected to the second flange base (3-5) via a first flange base (1-5).

6. The underwater ejection experiment device for multi-scale ratio experiments according to claim 5, characterized in that: The first flange base (1-5) and the second flange base (3-5) are connected via a first bolt (1-7).

7. The underwater ejection experiment device for multi-scale ratio experiments according to claim 2, characterized in that: The watertight housing (3-1) is engaged in the mounting hole (4-2) via a clamping groove (3-6).

8. An underwater ejection experiment device for multi-scale ratio experiments according to any one of claims 1 to 7, characterized in that: The base (4) comprises an outer frame (4-1), and a plurality of mounting holes (4-2) are arranged at intervals on the outer frame (4-1).

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