Parachute opening device

Abstract

The utility model belongs to the technical field of safety, and relates to a parachute opening device which is used for fixing a deceleration parachute pack of an unmanned aerial vehicle and pushing out and opening a deceleration parachute when needed, and is characterized by comprising a shell, an ignition tube seat and a cut-off piston are sequentially arranged in the shell from top to bottom, and a weak connecting position is reserved at the lower end of the shell. The lower end of the weak joint is provided with a connecting structure connected with an unmanned aerial vehicle parachute pack; an electric ignition tube is arranged in the ignition tube seat, and the electric ignition tube, the cut-off piston and an inner cavity of the shell form a narrow closed space; the cut-off piston can slide downwards along the inner wall of the shell and cut off the reserved weak connecting position. The parachute opening device can controllably separate and push out the parachute pack of the unmanned aerial vehicle; a mechanical separation structure is adopted, and gas and a large amount of heat are not discharged; gas production agents are not needed, so that the size is small, the weight is light, and the requirement for light weight of the unmanned aerial vehicle is met; only the electric ignition tube is used for starting, so that the reliability is high.

Description

umbrella opening device Technical Field

[0001] This utility model belongs to the field of safety technology and relates to a device for fixing a drone's deceleration parachute pack and deploying and opening the deceleration parachute when needed, i.e., a parachute opening device. Background Technology

[0002] Current drone parachute deployment methods involve using a gas generator to produce a large amount of gas in a short time, rapidly pushing the parachute pack out of the canopy to open the drogue chute. However, existing gas generators generate a significant amount of heat during the process of producing this large amount of gas, which poses a risk of damaging the drogue chute and parachute lines.

[0003] At the same time, because a certain amount of gas-generating agent is required, the gas generator is relatively large. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems by providing a parachute opening device for securing a drone's deceleration parachute pack and deploying and opening the deceleration parachute when needed.

[0005] The main technical solution of this utility model is as follows: a parachute opening device, characterized in that it includes a shell, and an ignition tube seat and a cut-off piston are arranged sequentially from top to bottom inside the shell. A weak connection is reserved at the lower end of the shell, and a connection structure for connecting with the UAV parachute is provided at the lower end of the weak connection. The ignition tube seat has an internal electric ignition tube, and the electric ignition tube, the cut-off piston and the inner cavity of the shell form a narrow sealed space. The cut-off piston can slide downward along the inner wall of the shell and cut off the reserved weak connection.

[0006] Preferably, the ignition tube socket, electric ignition tube, cut-off piston, and weak connection are located on the same center line of the housing.

[0007] Preferably, the electric ignition tube is an HLZ3006 type electric ignition tube.

[0008] Preferably, an O-ring is provided between the cut-off piston and the inner wall of the housing.

[0009] Preferably, the cutting piston is T-shaped, and the diameter of the lower end of the T-shaped cutting piston is approximately equal to the inner diameter of the weak connection.

[0010] Preferably, the connection structure with the drone parachute is an internal thread.

[0011] Preferably, the housing and the ignition tube socket are connected by a threaded seal.

[0012] More preferably, the housing and the ignition tube seat are sealed and fixed with thread-locking adhesive.

[0013] The parachute opening device of this utility model utilizes the function of the existing mature electric ignition tube. When started, the electric ignition tube generates high pressure in the narrow and sealed space inside the shell, which pushes the cutting piston to slide. The cutting piston cuts the weak connection reserved at the lower end of the shell, and pushes out the connected and fixed drone parachute at a certain speed, thereby opening the drone's deceleration parachute.

[0014] A preferred embodiment of this invention utilizes the existing HLZ3006 electric ignition tube, whose main performance characteristics are: maintaining temperatures of -40℃, +23℃, and +90℃ for 4 hours respectively, followed by ignition at 10cm. 3 Inside the sealed container, a PT curve test was conducted with a DC current of 1.20A. The test met the following requirements: ignition time less than 2.0ms, time from the start of pressure generation to the pressure reaching its maximum less than 2.0ms, and peak pressure greater than 6.9MPa-11.2MPa.

[0015] Advantages of this novel umbrella-opening device:

[0016] The parachute deployment device can be controlled to separate and deploy the drone parachute pack;

[0017] The umbrella opening device adopts a mechanical separation structure, which does not release gas or a large amount of heat;

[0018] The parachute deployment device does not require a gas-generating agent, so it is small in size and light in weight, which is suitable for the lightweight requirements of drones.

[0019] The umbrella opening device is started using only an electric ignition tube, ensuring high reliability. Attached Figure Description

[0020] Figure 1 is a structural schematic diagram of the umbrella opening device according to an embodiment of the present invention.

[0021] In the diagram, 1. Ignition tube socket; 2. Electric ignition tube; 3. O-ring seal; 4. Cut-off piston; 5. Housing; 6. Weak connection; 7. Internal thread. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the embodiments and accompanying drawings.

[0023] A parachute deployment device is provided for securing a drone's deceleration parachute pack and deploying the parachute when needed. Referring to Figure 1, the device mainly includes a housing 5. Inside the housing 5, from top to bottom, are an ignition tube seat 1 and a cut-off piston 4. A weak connection point 6 is provided at the lower end of the housing, and a connection structure for the drone's parachute pack is provided at the lower end of the weak connection point 6. An electric ignition tube 2 is built into the ignition tube seat 1. The electric ignition tube 2, the cut-off piston 4, and the inner cavity of the housing 5 form a narrow, sealed space. The cut-off piston 4 can slide downwards along the inner wall of the housing 5 and cut off the reserved weak connection point 6. The ignition tube seat 1, the electric ignition tube 2, the cut-off piston 4, and the weak connection point 6 are located on the same centerline of the housing 5.

[0024] In this embodiment, the housing 5 and the ignition tube seat 1 are fixedly connected by threaded adhesive sealant. An O-ring 3 is provided between the cut-off piston 4 and the inner wall of the housing 5 to enhance the sealing of the inner cavity, ensure the pressure inside the cavity, and improve the cut-off reliability.

[0025] In this embodiment, the cutting piston 4 is T-shaped, and the diameter of the lower end of the T-shaped cutting piston is approximately equal to the outer diameter of the weak connection 6.

[0026] The parachute opening device in this embodiment is connected to the drone parachute pack via an internal thread provided at the lower end of the weak connection 6.

[0027] The electric ignition tube 2 in this embodiment is a commercially available HLZ3006 type electric ignition tube, the technical parameters of which are shown in the table below:

[0028]

[0029] Example of operation: When the parachute opening device receives the current start signal from the drone, the electric ignition tube 2 is activated, and high pressure is generated in the narrow sealed cavity formed by the shell 5, O-ring 3 and cutting piston 4 for a short time. This pressure pushes the cutting piston 4 to slide downward and generates a cutting force much greater than that of the reserved weak connection 6, cutting off the reserved weak connection. This pushes out the drone parachute connected by the internal thread 7 at a speed greater than 5 m / s, so that the drone deceleration parachute opens naturally.

[0030] Any aspects not described in this embodiment are existing technologies well-known in the field.

Claims

1. An umbrella opening device, characterized in that... It includes a housing, inside which an ignition tube seat and a cut-off piston are arranged sequentially from top to bottom. A weak connection is reserved at the lower end of the housing, and a connection structure for connecting to the UAV parachute is provided at the lower end of the weak connection. The ignition tube seat contains an electric ignition tube, and the electric ignition tube, the cut-off piston and the inner cavity of the housing form a narrow, sealed space. The cut-off piston can slide down along the inner wall of the housing and cut off the reserved weak connection.

2. The umbrella opening device according to claim 1, characterized in that... The ignition tube socket, electric ignition tube, cut-off piston, and weak connection are located on the same center line of the housing.

3. The umbrella opening device according to claim 1 or 2, characterized in that... The electric ignition tube is an HLZ3006 type electric ignition tube.

4. The umbrella opening device according to claim 1 or 2, characterized in that... An O-ring is provided between the cut-off piston and the inner wall of the housing.

5. The umbrella opening device according to claim 1 or 2, characterized in that... The cutting piston is T-shaped, and the diameter of the lower end of the T-shaped cutting piston is approximately equal to the inner diameter of the weak connection.

6. The umbrella opening device of claim 1, wherein The structure that connects to the drone parachute is internally threaded.

7. The umbrella opening device of claim 1, wherein The housing and ignition tube socket are connected by a threaded seal.

8. The umbrella opening device of claim 7, wherein The housing and ignition tube socket are sealed and fixed with threaded adhesive.

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