Helicopter discharge pipe based on ejection principle

Abstract

The utility model provides a helicopter discharge pipe based on an injection principle. The helicopter discharge pipe comprises a pipe body and a plurality of ejector rods, the liquid guide hopper is arranged in the pipe body; the air inlet is formed in the side face of the pipe body, and the air inlet is aligned with the air flow incoming direction, namely, the course of the helicopter; the injection device is connected with the air inlet, the injection device is arranged in the pipe body, the injection device penetrates through the liquid guide hopper, and the injection device is used for forming high-speed airflow to inject waste liquid in the pipe body; based on the principle of injection, the device can discharge waste liquid at high pressure and high speed by using wind power without additionally arranging power drive, and the use effect is good.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of helicopter drain pipes, and particularly relates to a helicopter drain pipe based on the principle of ejection. BACKGROUND

[0002] Since the top of the main rotor of a helicopter is open, rainwater inevitably enters the helicopter, and the helicopter contains various liquids such as hydraulic oil, fuel and lubricating oil, which run and may be normally discharged, so the helicopter is provided with a liquid drainage system. The rainwater, hydraulic oil, fuel, lubricating oil and other liquids that need to be discharged are mixed and collected by using a low-lying liquid collection design, and then naturally drained by gravity through a pipeline to discharge outside the helicopter.

[0003] In order to facilitate drainage, the drain port is generally arranged on the bottom or the edge of the bottom of the helicopter, and the drain port is not designed to be too long based on aerodynamic considerations. Since the mixed liquid has a certain viscosity and the amount is generally not large, the mixed liquid is not very smooth and smooth when drained by gravity, and has a certain adhesion to the drain port. Under the action of the airflow of the helicopter, it will splash and adhere to some electronic devices on the bottom of the helicopter, such as Doppler radar, radio altimeter and other electronic devices that must be installed on the bottom of the helicopter, which will cause failure of the electronic devices. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a helicopter drain pipe design scheme based on the principle of ejection. By using wind power, the device itself does not need to be additionally powered and driven, and high-pressure and high-speed discharge of waste liquid is realized, which has good use effect and is suitable for most use scenarios of the helicopter and positions of each part of the helicopter body.

[0005] In the first aspect, the application provides a helicopter drain pipe based on the principle of ejection, which comprises:

[0006] a pipe body;

[0007] a liquid inlet, arranged in the pipe body;

[0008] an air inlet, arranged on the side surface of the pipe body, the air inlet being aligned with the airflow direction, i.e. the heading of the helicopter;

[0009] an ejection device, connected with the air inlet, the ejection device being arranged in the pipe body, the ejection device passing through the liquid inlet, and the ejection device being used to form a high-speed airflow to eject the waste liquid in the pipe body.

[0010] Preferably, the ejection device comprises:

[0011] an air inlet pipe, connected with the air inlet;

[0012] A horn-shaped rectifier tube, one end of which is connected with the air inlet pipe, and the other end of which penetrates the liquid guide hopper;

[0013] A straight cylindrical injection pipe, which is connected with the other end of the horn-shaped rectifier tube;

[0014] A liquid guide shuttle, which is covered outside the lower end of the horn-shaped rectifier tube and the straight cylindrical injection pipe.

[0015] Preferably, the injection device further comprises:

[0016] A wind deflector, which is arranged in the air inlet pipe; wherein the airflow passes through the turning of the wind deflector and the concentration of the horn-shaped rectifier tube, and then flows through the straight cylindrical injection pipe at a greater speed to form a more stable high-speed airflow.

[0017] In a second aspect, the application further provides a helicopter exhaust pipe based on the principle of injection, which comprises:

[0018] A pipe body;

[0019] An air inlet, which is arranged on the side of the pipe body and is aligned with the airflow direction, i.e. the heading of the helicopter;

[0020] An injection device, which is connected with the air inlet and is arranged in the pipe body, and is used to form a high-speed airflow to inject the waste liquid in the pipe body;

[0021] A liquid guide hopper, which has an inner pipe and is arranged in the pipe body, and the inner pipe is arranged in the injection device.

[0022] Preferably, the injection device comprises:

[0023] An air inlet pipe, which is connected with the air inlet;

[0024] A horn-shaped rectifier tube, one end of which is connected with the air inlet pipe, and the other end of which penetrates the liquid guide hopper;

[0025] A straight cylindrical injection pipe, which is connected with the other end of the horn-shaped rectifier tube; wherein the inner pipe is contained in the air inlet pipe, the horn-shaped rectifier tube, and the straight cylindrical injection pipe.

[0026] Preferably, the injection device further comprises:

[0027] A wind deflector, which is arranged in the air inlet pipe; wherein the airflow passes through the turning of the wind deflector and the concentration of the horn-shaped rectifier tube, and then flows through the straight cylindrical injection pipe at a greater speed to form a more stable high-speed airflow.

[0028] The application has the following technical effects:

[0029] (1) The application designs two kinds of helicopter drain pipe schemes, which are suitable for most use scenarios of helicopters and positions of each part of the helicopter body.

[0030] (2) Based on the principle of injection, the device itself does not need to be additionally powered by using wind to realize high-pressure and high-speed discharge of waste liquid, and the use effect is good.

[0031] (3) The application has simple structure, low manufacturing complexity, simple assembly method, clear and easy-to-understand use logic, small size and light weight, good economy, and is suitable for large-scale manufacturing and use. BRIEF DESCRIPTION OF DRAWINGS

[0032] Fig. 1 is a schematic diagram of an internal injection type drain pipe provided by an embodiment of the application;

[0033] Fig. 2 is a schematic diagram of an external injection type drain pipe provided by an embodiment of the application. DETAILED DESCRIPTION

[0034] Please refer to Figs. 1-2 The internal injection type drain pipe 200 provided by the application is composed of an air inlet pipe 201, a horn-shaped rectifier pipe 202, a liquid injection bucket 203, a pipe body 204, a liquid injection shuttle 205, an injection pipe 206, a pressure regulating ring 207, a drain outlet 208, a lower cavity 209, a wind guide pipe 210, a wind guide plate 211, and an upper cavity 212.

[0035] In other embodiments of the application, the external injection type drain pipe 300 is composed of a pipe body 301, an inner pipe 303, an air inlet pipe 304, a wind guide pipe 305, a horn-shaped rectifier pipe 306, an injection pipe 307, a pressure regulating ring 308, a drain outlet 309, a lower cavity 310, a wind guide plate 311, and an upper cavity 312.

[0036] The internal injection type drain pipe 200 and the external injection type drain pipe 300 are both composed of an outer pipe, a rectifier device, and a liquid injection device, based on the principle of injecting liquid by airflow, and waste liquid is injected out at a high speed.

[0037] The rectifying device is mainly composed of an air inlet pipe 201, a horn-shaped rectifying pipe 202, an ejector pipe 206 and a pressure equalizing ring 207. The air inlet pipe 201 is vertically installed on the side wall of the pipe body 204 in alignment with the airflow direction, i.e. the heading of the helicopter. The air guide pipe 210 is coaxial with the pipe body 204, and has the same size as the air inlet pipe 201. The air guide pipe 210 is connected to the air inlet pipe 201 through the air guide plate 211 and merges with the air inlet pipe 201 to form a right-angle channel. The air guide pipe 210 is connected to the large end of the horn-shaped rectifying pipe 202. Preferably, the air guide plate 211 is arranged at an angle of 45° to minimize the energy consumption and turbulence of the airflow. After the turning of the airflow through the air guide plate 211 and the concentration of the airflow through the horn-shaped rectifying pipe 202, the airflow flows through the straight cylindrical ejector pipe 206 at a greater speed to form a more stable high-speed airflow.

[0038] The liquid guiding device is composed of a liquid guiding hopper 203 and a liquid guiding shuttle 205. The liquid guiding hopper 203 is a funnel-shaped structure, with the large end connected to the inner wall of the pipe body 204 and the hopper end flush with the top of the liquid guiding shuttle 205. The diameter of the hopper end is 1.3 times the diameter of the top of the liquid guiding shuttle 205. The liquid guiding shuttle 205 is a shuttle-shaped structure, covering the lower end of the horn-shaped rectifying pipe 202 and the outer surface of the ejector pipe 206. The height of the liquid guiding shuttle 205 is 0.5 times the height of the horn-shaped rectifying pipe 202 and the ejector pipe 206. The diameter of the top of the liquid guiding shuttle 205 is 0.5 times the diameter of the air guide pipe 210. The maximum diameter of the liquid guiding shuttle 205 is 1 times the diameter of the air guide pipe 210. The diameter of the lower part of the liquid guiding shuttle 205 is consistent with the diameter of the ejector pipe 206, which is 0.2 times the diameter of the air guide pipe 210. The liquid guiding shuttle 205 guides the waste liquid flowing down from the upper cavity 212 to adhere to its surface and flow along the surface to the pipe opening of the ejector pipe 206. At the pipe opening of the ejector pipe 206, the waste liquid is ejected through the stable high-speed airflow ejected from the ejector pipe 206 and discharged through the discharge port 208.

[0039] The pressure equalizing ring 207 is arranged at the discharge port 208 and is a ring-shaped structure connected to the inner wall of the pipe body 204. The inner diameter of the pressure equalizing ring 207 is 0.8 times the diameter of the pipe body 204. The pressure equalizing ring 207 wraps a part of the lower cavity 209 to reduce the turbulence of the lower cavity 209 and make the waste liquid more smoothly ejected.

[0040] The outer ejecting type discharge pipe 300 is composed of an outer pipe, a rectifying device and a liquid guiding device. Based on the principle of airflow ejecting liquid, the waste liquid is ejected at a high speed.

[0041] The rectifying device is mainly composed of an air inlet pipe 304, a horn-shaped rectifying pipe 306, an ejector pipe 307 and a pressure equalizing ring 308. The air inlet pipe 201 is vertically installed on the side wall of the pipe body 204 in alignment with the airflow direction, i.e. the helicopter heading. The air inlet pipe 304 is coaxial with the pipe body 301, and the air guide pipe 305 is the same size as the air inlet pipe 304. The air guide pipe 305 is connected to the large end of the horn-shaped rectifying pipe 306 through the air guide plate 311. Preferably, the air guide plate 311 is arranged at an angle of 45° to minimize the energy consumption and turbulence of the airflow. After the turning of the air guide plate 311 and the concentration of the horn-shaped rectifying pipe 306, the airflow flows through the straight cylindrical ejector pipe 307 at a greater speed to form a more stable high-speed airflow.

[0042] The liquid guiding device is composed of a liquid guiding hopper 302 and an inner pipe 303. The liquid guiding hopper 302 is a funnel with a large end connected to the inner wall of the pipe body 301 and a hopper end connected to the inner pipe 303. The inner pipe 303 is coaxial with the pipe body 301, and the diameter of the inner pipe 303 is 0.2 times the diameter of the air guide pipe 305. The diameter of the ejector pipe 307 is 0.4 times the diameter of the air guide pipe 305. The lower end of the inner pipe 303 is higher than the lower end of the ejector pipe 307 by a distance of one inner pipe 303 diameter. When the waste liquid is discharged from the lower end of the inner pipe 303, it is fully wrapped by the stable high-speed airflow ejected from the ejector pipe 206 and ejected from the discharge port 208.

[0043] The pressure equalizing ring 308 is arranged at the discharge port 309 and is an annular structure connected to the inner wall of the pipe body 301. The inner diameter of the pressure equalizing ring 308 is 0.8 times the diameter of the pipe body 301. Its function is to wrap a part of the lower cavity 310 space, reduce the turbulence of the lower cavity 310, and make the waste liquid more smoothly be ejected.

[0044] The working process one of the inner ejector type discharge pipe 200. After the waste liquid flows into the pipe body, it enters the upper cavity 212 and flows down the liquid guiding hopper 203. Under the guidance of the liquid guiding hopper 203, the waste liquid flows to the liquid guiding shuttle 205. The liquid guiding shuttle 205 guides the waste liquid flowing down from the upper cavity 212 and adheres to its surface, and leaves along the surface to the pipe mouth of the ejector pipe 206.

[0045] The working process two of the inner ejector type discharge pipe 200. The air inlet pipe 201 is aligned with the airflow direction, i.e. the helicopter heading. After the turning of the air guide plate 211 and the concentration of the horn-shaped rectifying pipe 202, the airflow flows through the straight cylindrical ejector pipe 206 at a greater speed to form a more stable high-speed airflow.

[0046] The working process three of the inner ejector type discharge pipe 200. At the pipe mouth of the ejector pipe 206, the waste liquid is ejected from the discharge port 208 under the guidance of the stable high-speed airflow ejected from the ejector pipe 206.

[0047] Extraction tube 300 working process one. After the waste liquid flows into the pipe body 301, it enters the upper cavity 312 and flows down the liquid guide 302, and flows to the inner tube 303 under the guide of the liquid guide 302.

[0048] Extraction tube 300 working process two. The air inlet pipe 201 is aligned with the air flow direction, that is, the helicopter heading, and the air flow passes through the turning of the air deflector 311 and the concentration of the horn-shaped straightening pipe 306, and then flows through the straight extraction pipe 307 at a larger speed to form a more stable high-speed air flow.

[0049] Extraction tube 300 working process three. When the waste liquid is discharged from the lower end of the inner tube 303, it is fully wrapped by the stable high-speed air flow sprayed by the extraction pipe 206, and is sprayed out of the discharge port 208.

[0050] Among them, the air inlet pipe 201 is aligned with the air flow direction, that is, the helicopter heading, and is vertically installed on the side wall of the pipe body 204, the air deflector pipe 210 is coaxial with the pipe body 204, the air deflector pipe 210 is the same size as the air inlet pipe 201, the air deflector pipe 210 is connected to the large end of the horn-shaped straightening pipe 202 through the air deflector 211. The air deflector pipe 210 is fused with the air inlet pipe 201 to form a right-angle channel. Preferably, the air deflector 211 is arranged at 45°.

[0051] Among them, the liquid guide 203 is a funnel, the mouth end is flush with the top of the liquid guide shuttle 205, and the diameter of the mouth end is 1.3 times the diameter of the top of the liquid guide shuttle 205. The liquid guide shuttle 205 is a shuttle-shaped structure, the height of which is 0.5 times the overall height of the horn-shaped straightening pipe 202 and the extraction pipe 206. The top diameter of the liquid guide shuttle 205 is 0.5 times the diameter of the air deflector pipe 210, the maximum diameter of the liquid guide shuttle 205 is 1 times the diameter of the air deflector pipe 210, and the lower diameter of the liquid guide shuttle 205 is consistent with the diameter of the extraction pipe 206, which is 0.2 times the diameter of the air deflector pipe 210.

[0052] Among them, the pressure ring 207 is arranged in the discharge port 208 with an inner diameter of 0.8 times the diameter of the pipe body 204.

[0053] Among them, the air inlet pipe 201 is aligned with the air flow direction, that is, the helicopter heading, and is vertically installed on the side wall of the pipe body 204, the air inlet pipe 304 is coaxial with the pipe body 301, the air deflector pipe 305 is the same size as the air inlet pipe 304, the air deflector pipe 210 is connected to the large end of the horn-shaped straightening pipe 306 through the air deflector 311. The air deflector pipe 305 is fused with the air inlet pipe 201 to form a right-angle channel. Preferably, the air deflector 311 is arranged at 45°.

[0054] The liquid guiding hopper 302 is a funnel. The inner tube 303 is coaxial with the tube body 301, the diameter of the inner tube 303 is 0.2 times the diameter of the air guide tube 305, and the diameter of the ejector tube 307 is 0.4 times the diameter of the air guide tube 305. The lower end of the inner tube 303 is higher than the lower end of the ejector tube 307 by a distance of one diameter of the inner tube 303.

[0055] The inner diameter of the whole pressure ring 308 is 0.8 times the diameter of the tube body 301.

Claims

1. A helicopter exhaust pipe based on the ejector principle, characterized in that, The helicopter exhaust pipe includes: tube body; A liquid inlet funnel is disposed within the tube body; An air inlet is located on the side of the pipe body, and the air inlet is aligned with the direction of airflow, i.e. the helicopter's heading. An ejector device is connected to the air inlet and is disposed inside the pipe. The ejector device passes through the liquid inlet hopper and is used to generate a high-speed airflow to eject the waste liquid inside the pipe.

2. The helicopter exhaust pipe according to claim 1, characterized in that, The ejector device includes: The air inlet duct is connected to the air inlet. A horn-shaped rectifier tube, one end of which is connected to the air inlet pipe, and the other end of which passes through the liquid inlet hopper; A straight cylindrical ejector tube is connected to the other end of the horn-shaped rectifier tube; The liquid extraction shuttle is enclosed at the lower end of the trumpet-shaped rectifier tube and outside the straight cylindrical ejector tube.

3. The helicopter exhaust pipe according to claim 2, characterized in that, The ejector device further includes: An air guide plate is installed inside the air inlet pipe; whereby, after the airflow is deflected by the air guide plate and concentrated by the trumpet-shaped rectifier pipe, it flows through the straight cylindrical ejector pipe at a higher speed, forming a more stable high-speed airflow.

4. A helicopter exhaust pipe based on the ejector principle, characterized in that, The helicopter exhaust pipe includes: tube body; An air inlet is located on the side of the pipe body, and the air inlet is aligned with the direction of airflow, i.e. the helicopter's heading. An ejector device is connected to the air inlet and is disposed inside the pipe. The ejector device is used to generate a high-speed airflow to eject the waste liquid inside the pipe. A liquid-guiding funnel has an inner tube, which is disposed within the tube body, and the inner tube is disposed within the ejector device.

5. The helicopter exhaust pipe according to claim 4, characterized in that, The ejector device includes: The air inlet duct is connected to the air inlet. A horn-shaped rectifier tube, one end of which is connected to the air inlet pipe, and the other end of which passes through the liquid inlet hopper; A straight cylindrical ejector tube is connected to the other end of the horn-shaped rectifier tube; wherein the inner tube is housed within the air inlet pipe, the horn-shaped rectifier tube, and the straight cylindrical ejector tube.

6. The helicopter exhaust pipe according to claim 5, characterized in that, The ejector device further includes: An air guide plate is installed inside the air inlet pipe; whereby, after the airflow is deflected by the air guide plate and concentrated by the trumpet-shaped rectifier pipe, it flows through the straight cylindrical ejector pipe at a higher speed, forming a more stable high-speed airflow.

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