Cylindrical pneumatic ejector with built-in launching tube

Abstract

The utility model relates to the technical field of unmanned aerial vehicles, and provides a cylindrical pneumatic catapult with a built-in launching tube, which comprises a main launching tube, the built-in launching tube, a connecting base, a piston tube, a folding bracket, a high-pressure gas tank and a shut-off valve, the folding support is fixedly connected with the near-transmitting end of the main body transmitting cylinder, the far-transmitting end of the main body transmitting cylinder is fixedly connected with the connecting base, the connecting base is fixedly connected with the high-pressure gas tank, the built-in transmitting tube is fixed in the main body transmitting cylinder, and the piston tube is located in the built-in transmitting tube and is a tube with at least one blocked end. The shutoff valve is located at the joint of the high-pressure gas tank and the connecting base; and the shut-off valve is opened, compressed gas in the high-pressure gas tank rapidly rushes into the built-in launching tube, so that the piston tube rapidly pops out of the built-in launching tube, and the unmanned aerial vehicle located in the main launching tube is pushed to pop out of the main launching tube. The built-in launching tube serves as a compressed gas channel, energy loss of compressed gas is reduced, and the launching speed of the unmanned aerial vehicle is increased.

Description

Technical Field

[0001] The present application relates to the technical field of unmanned aerial vehicles (UAVs), and in particular to a cylindrical pneumatic catapult with a built-in launch tube, which is a catapult device that uses compressed air as power to launch a folding-wing UAV. Background Art

[0002] In the current drone field, with the continuous advancement of technology and the rapid development of the market, drones have become a popular choice in all walks of life, with applications ranging from military reconnaissance to civilian aerial photography, to cargo transportation and other aspects.

[0003] UAV launch refers to the process of reaching a certain altitude and speed in the air from a specific takeoff location and through a specific method. It is often considered one of the most difficult and critical stages in UAV combat operations, directly impacting operational technical indicators and requirements such as the system's maneuverability, regional adaptability, reusability, and survivability. However, the UAV launch process is prone to failures, with serious consequences. The ability to safely and reliably launch has become a crucial indicator for evaluating UAV performance, and numerous countries have conducted extensive research and experimentation on UAV launches.

[0004] There are various drone launch methods, including rolling takeoff, hand launch, rocket-assisted launch, vertical takeoff, and catapult launch. Based on launch location, drones can be categorized as land-based, air-based, and sea-based. Based on launch propulsion, drones can be categorized as self-powered (relying on their own power), externally powered (using other propulsion), and combined launch methods.

[0005] The catapult launch method for drones converts other forms of energy into the mechanical kinetic energy required for takeoff, accelerating the aircraft to a safe takeoff speed on a predetermined length of rail. The aircraft itself lacks a high-energy-density power source, resulting in a lighter drone for the same mission and payload, helping to reduce costs.

[0006] Traditional cylindrical catapults use a single launch tube as the piston cylinder. Due to the large size of drones, the piston is also particularly large, significantly increasing manufacturing costs and processing difficulties. This also results in poor sealing and heavy weight, making it extremely inconvenient to use. If the launch tube is square rather than round, it would be even more difficult to achieve a perfect piston fit.

[0007] Because the cross-section of the launch tube of a traditional cylindrical catapult is much larger than the cross-section of the compressed gas output pipe, the compressed gas expands rapidly when it reaches the launch tube, reducing the internal pressure and thus affecting the launch speed of the drone.

[0008] Therefore, to solve the above problems, it is necessary to invent a cylindrical ejector with a built-in emitter tube. Regardless of the size of the drone, the size of the built-in piston can be fixed and always circular, greatly reducing the processing cost and weight. Summary of the Invention

[0009] The present utility model aims to solve the above-mentioned problems and provides a cylindrical pneumatic ejector with a built-in emitter tube. By setting a built-in emitter tube as the cylinder of the piston tube inside the main body of the emitter tube, the main body of the emitter tube only serves as the ballistic tube of the drone. The diameter of the built-in emitter tube is almost the same as the diameter of the compressed gas output pipeline, and the output pressure remains unchanged, improving the launch speed.

[0010] To achieve the above object, the present utility model is realized through the following technical solutions: A cylindrical pneumatic ejector with a built-in emitter tube, comprising: a main body emitter tube, a built-in emitter tube, a connection base, a piston tube, a folding bracket, a high-pressure gas tank, and a shut-off valve; the folding bracket is fixedly connected to the near-launch end of the main body emitter tube and is used to support the launch angle of the main body emitter tube after unfolding; the far-launch end of the main body emitter tube is fixedly connected to the connection base, the connection base is fixedly connected to the high-pressure gas tank, the built-in emitter tube is fixed inside the main body emitter tube, the piston tube is located inside the built-in emitter tube, the piston tube is a pipe sealed at at least one end, and the shut-off valve is located at the connection between the high-pressure gas tank and the connection base and is used to control the discharge of the compressed gas in the high-pressure gas tank;

[0011] When the shut-off valve is opened, the compressed gas in the high-pressure gas tank quickly rushes into the built-in emitter tube, causing the piston tube to quickly pop out of the built-in emitter tube and pushing the drone located in the main body emitter tube out of the main body emitter tube.

[0012] Preferably, the connection base includes a first connection head, a second connection head, and an extended fixing plate. The size and shape of the extended fixing plate are the same as the cross-section of the far-launch end of the main body emitter tube. The extended fixing plate is fixedly connected to the main body emitter tube. A through hole is opened in the center of the extended fixing plate, and the first connection head and the second connection head are connected back to back at the through hole;

[0013] Preferably, the first connection head is fixedly connected to the built-in emitter tube, and the second connection head is fixedly connected to the high-pressure gas tank;

[0014] Preferably, both the first connection head and the second connection head are hollow structures without plugs;

[0015] Preferably, the inner diameters of the built-in emitter tube, the first connection head, and the second connection head are the same, which is beneficial to the smooth flow of air pressure when compressed gas is input, achieving the maximum launch speed and maximizing the launch efficiency.

[0016] Preferably, the contour shape of the extended fixing plate can be the same as the outer contour shape of the main body launch tube, which helps to improve the stability of the overall structure.

[0017] Preferably, the materials of the built-in launch tube and the piston tube are preferably lightweight and high-strength materials.

[0018] Advantages of the technical solution of the present application:

[0019] 1. The design of the built-in launch tube ensures that gas will not leak or expand during the ejection process, resulting in a decrease in internal air pressure, which helps to reduce the energy loss of the gas during the ejection process, thereby increasing the launch speed of the drone.

[0020] 2. Since it is a built-in launch tube, there is no longer a need for the piston to directly cooperate with the main body of the launch tube. Therefore, the piston tube is very small in volume, light in weight, low in cost, simple to manufacture, and has better sealing and high reliability.

[0021] 3. The diameter of the built-in launch tube is almost the same as the diameter of the compressed gas input interface, so the air pressure and launch speed will not be affected.

[0022] 4. By placing the drone in the launch tube and using the inner wall of the launch tube as the sliding track of the drone, it can ensure that the drone has a stable attitude when leaving the launch tube, and can more precisely control its launch direction and speed, thereby improving its stability and accuracy during flight, which is particularly important for drones that need to accurately strike targets or perform specific tasks.

[0023] 5. Placing the drone in the launch tube for launch can also enhance its adaptability. Since the launch tube can be designed in different shapes and sizes to adapt to different types of drones and launch requirements, this launch method can be applied to a variety of different scenarios and conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is a top view of the overall structure of the main body launch tube of a cylindrical pneumatic ejector with a built-in launch tube provided by the present utility model, shown transparently;

[0026] Figure 2Front and side view of the overall structure with transparent display of the main launch tube of a cylindrical pneumatic ejector with an internal launch tube provided by the present utility model;

[0027] Figure 3 Left rear view of the overall structure with transparent display of the main launch tube of a cylindrical pneumatic ejector with an internal launch tube provided by the present utility model;

[0028] Figure 4 Top view of the connection base structure of a cylindrical pneumatic ejector with an internal launch tube provided by the present utility model;

[0029] Figure 5 Front left view of the internal structure of the main launch tube of a cylindrical pneumatic ejector with an internal launch tube provided by the present utility model;

[0030] Figure 6 Schematic diagram of the piston tube structure of a cylindrical pneumatic ejector with an internal launch tube provided by the present utility model;

[0031] Figure 7 View of an application example of a cylindrical pneumatic ejector with an internal launch tube provided by the present utility model;

[0032] Explanation of the reference numerals in the figure:

[0033] 1. Main launch tube; 2. Internal launch tube; 3. Connection base; 4. Piston tube; 5. Folding bracket; 6. High-pressure gas tank; 7. Shut-off valve; 31. First connector; 32. Second connector; 33. Extended fixing plate; Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0035] To make the above objects, features, and advantages of the present application more obvious and understandable, the present application will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0036] One embodiment of the present utility model is in combination with Figures 1 to 6, A cylindrical pneumatic ejector with an in-built launch tube 2, comprising: a cylindrical pneumatic ejector with an in-built launch tube 2, including a main launch tube 1, an in-built launch tube 2, a connection base 3, a piston tube 4, a folding bracket 5, a high-pressure gas cylinder 6 and a shut-off valve 7; the folding bracket 5 is fixedly connected to the near launch end of the main launch tube 1 for supporting the launch angle of the main launch tube 1 after unfolding; the far launch end of the main launch tube 1 is fixedly connected to the connection base 3, the connection base 3 is fixedly connected to the high-pressure gas cylinder 6, the in-built launch tube 2 is fixed inside the main launch tube 1, the piston tube 4 is located inside the in-built launch tube 2, the piston tube 4 is a pipe sealed at at least one end, and the shut-off valve 7 is located at the connection between the high-pressure gas cylinder 6 and the connection base 3 for controlling the discharge of compressed gas in the high-pressure gas cylinder 6;

[0037] When the shut-off valve 7 is opened, the compressed gas in the high-pressure gas cylinder 6 quickly rushes into the in-built launch tube 2, causing the piston tube 4 to quickly pop out of the in-built launch tube 2 and pushing the drone located in the main launch tube 1 out of the main launch tube 1. As Figure 7 shown, it is a view of an application example of a cylindrical pneumatic ejector with an in-built launch tube provided by the present application.

[0038] Preferably, the connection base 3 includes a first connection head 31, a second connection head 32 and an extended fixing plate 33. The size and shape of the extended fixing plate 33 are the same as the cross-section of the far launch end of the main launch tube 1. The extended fixing plate 33 is fixedly connected to the main launch tube 1, and a through hole is opened in the center of the extended fixing plate 33. The first connection head 31 and the second connection head 32 are connected back to back at the through hole;

[0039] Preferably, the first connection head 31 is fixedly connected to the in-built launch tube 2, and the second connection head 32 is fixedly connected to the high-pressure gas cylinder 6;

[0040] Preferably, both the first connection head 31 and the second connection head 32 are hollow structures without plugs;

[0041] Preferably, the in-built launch tube 2, the first connection head 31 and the second connection head 32 have the same inner diameter, which is beneficial to the smooth flow of air pressure during the input of compressed gas, achieving the maximum launch speed and maximizing the launch efficiency.

[0042] Preferably, the contour shape of the extended fixing plate 33 can be the same as the outer contour shape of the main launch tube 1, which helps to improve the stability of the overall structure.

[0043] Preferably, the materials of the in-built launch tube 2 and the piston tube 4 are preferably lightweight and high-strength materials.

[0044] It is worth mentioning that the accompanying drawings provided in the embodiments of the present application are only one application example of this mechanism, including but not limited to the structures shown in the drawings.

[0045] In the following description, specific details such as specific system architectures and technologies are presented for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, those skilled in the art should understand that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from obscuring the description of the present application.

[0046] It should be noted that in the description of the present utility model, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0047] The orientation or positional relationship indicated by terms such as "upper", "lower", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0048] Unless otherwise clearly defined and limited, the terms "fixed", "set", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; for those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific circumstances.

[0049] The above embodiments are only descriptions of the preferred modes of the present application, and do not limit the scope of the present application. Without departing from the design spirit of the present application, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present application should all fall within the protection scope determined by the claims of the present application.

Claims

1. A cylindrical pneumatic ejector with a built-in emitter tube, characterized in that, Comprising: A main body launch tube, an internal launch tube, a connection base, a piston tube, a folding bracket, a high-pressure gas tank, and a shut-off valve; the folding bracket is fixedly connected to the near launch end of the main body launch tube and is used to support the launch angle of the main body launch tube after unfolding; the far launch end of the main body launch tube is fixedly connected to the connection base, the connection base is fixedly connected to the high-pressure gas tank, the internal launch tube is fixed inside the main body launch tube, the piston tube is located inside the internal launch tube, the piston tube is a pipe with at least one end blocked, and the shut-off valve is located at the connection between the high-pressure gas tank and the connection base and is used to control the discharge of the compressed gas in the high-pressure gas tank; When the shut-off valve is opened, the compressed gas in the high-pressure gas tank quickly rushes into the internal launch tube, causing the piston tube to quickly pop out of the internal launch tube and pushing the unmanned aerial vehicle located in the main body launch tube to pop out of the main body launch tube.

2. The cylindrical pneumatic ejector with a built-in emitter tube according to claim 1, characterized in that, The connection base includes a first connection head, a second connection head, and an extended fixing plate. The size and shape of the extended fixing plate are the same as the cross-section of the far launch end of the main body launch tube. The extended fixing plate is fixedly connected to the main body launch tube. A through hole is opened in the center of the extended fixing plate, and the first connection head and the second connection head are connected back to back at the through hole.

3. The cylindrical pneumatic ejector with a built-in emitter tube according to claim 2, characterized in that, The first connection head is fixedly connected to the internal launch tube, and the second connection head is fixedly connected to the high-pressure gas tank.

4. A cylindrical pneumatic ejector with a built-in emitter tube according to claim 3, characterized in that, Both the first connection head and the second connection head are hollow structures without plugs, and the internal launch tube, the first connection head, and the second connection head have the same inner diameter.

5. The cylindrical pneumatic ejector with a built-in emitter tube according to claim 4, characterized in that, The materials of the internal launch tube and the piston tube are lightweight and high-strength materials.

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