Anti-suffocation cutting device and method based on human-chair separation signal

Abstract

The present invention discloses an anti-suffocation cutting device and method based on a human-chair separation signal. The device includes: a metal electrode installed on the seat, the metal electrode is connected to the circuit board of the anti-suffocation cutting device through the contact electrode of the external circuit; a ring knife, one end of which is fixed at the initial position by a rotating shaft; an electric detonator, whose actuator rod provides thrust for the ring knife; wherein the electric detonator, the ring knife and the circuit board are installed in a shell; the shell is fixed on the bellows of the oxygen mask. The device triggers the bellows cutting device by receiving the human-chair separation signal after ejection from the aircraft, and opens the oxygen supply channel before entering the water, effectively solving the problem of suffocation of the pilot due to blockage of the oxygen channel of the oxygen mask after emergency ejection into the sea, thereby improving the safety of emergency ejection.

Description

Technical Field

[0001] The present invention relates to the technical field of aviation life-saving, and in particular to an anti-suffocation cutting device and method based on a person-chair separation signal. Background Art

[0002] Ejection is a common way of life-saving when a combat aircraft is in distress. When a pilot ejects from an aircraft, he or she may fall into a coma due to an unexpected situation, so that he or she cannot take off the oxygen mask after landing. When falling into the water at sea, it is easy to cause hypoxia and drowning, endangering the life of the pilot. The bellows cutting device is designed to meet the needs of water rescue and is used to solve the oxygen supply problem of the pilot after the parachute oxygen is exhausted after the pilot ejects from the aircraft.

[0003] At present, the oxygen masks currently in service in China do not have the anti-suffocation function when entering water. In foreign countries, some oxygen masks use automatic cutting devices when entering seawater. After the pilot parachutes into the sea, the cutting device is triggered by the salt concentration of the seawater to cut the bellows of the oxygen mask and open the oxygen channel after the pilot leaves the aircraft to achieve the anti-suffocation function. Using salt concentration as the trigger signal, when the cutting device enters the seawater for too short a time or is not immersed in the seawater enough, the cutting device may not be triggered, causing the cutting device to fail, resulting in the risk of suffocation of the pilot. Summary of the invention

[0004] In view of this, an embodiment of the present invention provides an anti-suffocation cutting device and method based on a person-chair separation signal to solve the problem of potential safety hazards in the prior art in preventing asphyxiation of oxygen masks after ejection from an aircraft and landing.

[0005] The embodiment of the present invention provides an anti-suffocation cutting device based on a person-chair separation signal, comprising:

[0006] A metal electrode is installed on the seat, and the metal electrode is connected to the circuit board of the anti-suffocation cutting device through a contact electrode of an external circuit;

[0007] A ring cutter, one end of which is fixed at an initial position by a rotating shaft;

[0008] An electric detonator, whose actuator rod provides thrust for the ring cutter;

[0009] The electric detonator, the ring knife and the circuit board are installed in a shell; and the shell is fixed on the bellows of the oxygen mask.

[0010] Optionally, the shell includes a first arc-shaped shell and a second arc-shaped shell; the first arc-shaped shell and the second arc-shaped shell are fixed to the bellows by two pins; wherein a cavity is also provided on the outside of the second arc-shaped shell for accommodating the ring knife, the electric detonator and the circuit board.

[0011] Optionally, the electric detonator includes a sealing ring and a gas leakage hole; wherein, when the actuating rod of the electric detonator moves to a certain position, the sealing ring fails, and the gunpowder gas is slowly discharged through the gas leakage hole.

[0012] Optionally, it also includes: a limiting device; wherein, when the ring knife is pushed by the actuating rod of the electric detonator, the ring knife rotates around the axis to a preset angle, contacts the limiting device, and stops rotating.

[0013] Optionally, it also includes: a torsion spring, which is a tangential arm structure; the load of the torsion spring is in the same direction as the coil spring; the long arm of the torsion spring is clamped in the groove of the shell through the rotating shaft; the short arm of the torsion spring is used to constrain the ring knife so that the ring knife is in the initial position.

[0014] Optionally, it also includes: an oxygen concentration sensor, the patch is arranged in the oxygen mask and connected to the circuit board through an external circuit.

[0015] Optionally, the circuit board is electrically connected or wirelessly connected to the ejection lifesaving system.

[0016] Optionally, the circuit board also includes a self-test circuit.

[0017] Beneficial effects of the embodiments of the present invention:

[0018] An embodiment of the present invention provides an anti-suffocation cutting device based on a human-chair separation signal. By receiving the human-chair separation signal after ejection from the aircraft, the bellows cutting device is triggered to open the oxygen supply channel before entering the water, thereby effectively solving the problem of pilot suffocation caused by blockage of the oxygen channel of the oxygen mask after emergency ejection into the sea, thereby improving the safety of emergency ejection.

[0019] The embodiment of the present invention further provides an anti-suffocation cutting method based on a person-chair separation signal, using the aforementioned anti-suffocation cutting device based on a person-chair separation signal:

[0020] Start the cutting system according to the start signal of the ejection lifesaving system;

[0021] Obtain the connection status of the metal electrode and the contact electrode to determine whether the person and the chair are separated;

[0022] After the person and chair are separated, the electric initiator is activated to push the ring knife to cut the bellows of the oxygen mask.

[0023] Optionally, it also includes:

[0024] If the separation of the person and the chair fails, the electric detonator is activated to cut the bellows according to the descent altitude and / or the oxygen concentration in the oxygen mask.

[0025] Beneficial effects of the embodiments of the present invention:

[0026] The embodiment of the present invention provides an anti-suffocation cutting method based on a human-chair separation signal. By receiving the human-chair separation signal after ejection from the aircraft, a bellows cutting device is triggered to open the oxygen supply channel before entering the water, thereby effectively solving the problem of pilot suffocation caused by blockage of the oxygen channel of the oxygen mask after emergency ejection into the sea, thereby improving the safety of emergency ejection. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The features and advantages of the present invention will be more clearly understood by referring to the accompanying drawings, which are schematic and should not be construed as limiting the present invention in any way. In the accompanying drawings:

[0028] Figure 1 An exploded diagram of an anti-suffocation cutting device based on a person-chair separation signal in Embodiment 1 of the present invention is shown;

[0029] Figure 2 The structure diagram of the mechanical part of an anti-suffocation cutting device based on a person-chair separation signal in Embodiment 1 of the present invention is shown;

[0030] Figure 3 The figure shows an installation diagram of an anti-suffocation cutting device based on a person-chair separation signal in Embodiment 1 of the present invention;

[0031] Figure 4 It shows one of the schematic diagrams of the shell connection of an anti-suffocation cutting device based on a person-chair separation signal in Embodiment 1 of the present invention;

[0032] Figure 5 The second schematic diagram of the shell connection of an anti-suffocation cutting device based on a person-chair separation signal in Embodiment 1 of the present invention is shown;

[0033] Figure 6 A schematic diagram showing the installation position of a torsion spring of an anti-suffocation cutting device based on a person-chair separation signal in Embodiment 1 of the present invention is shown;

[0034] Figure 7 A schematic diagram showing the working state of a ring knife of an anti-suffocation cutting device based on a person-chair separation signal in Example 1 of the present invention is shown;

[0035] Figure 8 The structure diagram of an anti-suffocation cutting device based on a person-chair separation signal before the electric detonator is activated in Embodiment 1 of the present invention is shown;

[0036] Fig. 9 The structure diagram of an anti-suffocation cutting device based on a person-chair separation signal after the electric detonator is activated in Embodiment 1 of the present invention is shown;

[0037] Fig.10 A flow chart of an anti-suffocation cutting method based on a person-chair separation signal in Embodiment 2 of the present invention is shown. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0039] Example 1

[0040] like Figures 1 to 9 As shown, an embodiment of the present invention provides an anti-suffocation cutting device based on a person-chair separation signal, comprising a metal electrode 1, a circuit board 2, a ring knife 3, an electric detonator 4 and a shell 5, wherein: the metal electrode 1 installed on the seat, the metal electrode 1 is connected to the circuit board 2 of the anti-suffocation cutting device through a contact electrode of an external circuit; one end of the ring knife 3 is fixed at an initial position by a rotating shaft 6; the actuating rod of the electric detonator 4 provides thrust for the ring knife 3; the electric detonator 4, the ring knife 3 and the circuit board 2 are installed in the shell 5; the shell 5 is fixed on the bellows of the oxygen mask.

[0041] In this embodiment, after the bellows cutting device is started, the working electrode connects the circuit, and determines whether the pilot is separated from the chair by monitoring the electrical signal of the program controller. If it is determined that they are separated, the circuit triggers the electric detonator, outputs gas to drive the push rod to push the ring knife, cuts the oxygen mask bellows, and connects the inner cavity of the bellows to the external atmosphere.

[0042] The bellows cutting device consists of five parts: a mechanical part, an electric detonator 4, a circuit board 2, a working electrode 1 and a battery 7. The mechanical part is the direct actuator for realizing the cutting function, including a push rod, a ring knife and other structures; the electric detonator provides power for the cutting device, and drives the push rod to push the ring knife through the explosion output gas to cut the oxygen mask bellows; the circuit board is the control center of the cutting device, and has main functions such as signal discrimination and detonation control; the working electrode receives the human-chair separation signal and transmits the signal to the discrimination circuit, which excites the electric detonator after discrimination; the battery supplies power to the cutting device. The human-chair separation signal is obtained through the voltage signal generated by the connection state of the metal electrode and the contact electrode.

[0043] like Figure 2 As shown, the housing includes a first arc-shaped housing 501 and a second arc-shaped housing 502; the first arc-shaped housing 501 and the second arc-shaped housing 502 are fixed to the bellows by two latches. A cavity 503 is also provided on the outside of the second arc-shaped housing for accommodating the ring knife, the electric detonator and the circuit board. One latch is the rotating shaft 6.

[0044] The control part of the bellows cutting device is mainly composed of a working circuit board 2 and a self-test circuit board 8. The function of the electronic circuit is to determine whether the person and the chair are separated through the electrical signal of the program controller, and to trigger the pyrotechnics according to the judgment result. It is a key component for the bellows cutting device to realize its function.

[0045] like Figure 1 and Figure 3 As shown, the bellows cutting device is used in conjunction with the bellows of the oxygen mask. A wire clamp is installed at the groove 504 in the bellows, and the bellows with the wire clamp is clamped on the clamping groove of the bellows cutting device, so that the bellows cutting device and the bellows can be fixed; the distance between the bellows cutting device and the exhalation valve on the oxygen mask is about 70mm, and the cross-linking relationship between the bellows cutting device and the bellows is as shown in FIG. Figure 4 , Figure 5 shown.

[0046] like Figure 6 As shown, the main function of the torsion spring 9 is to fix the ring knife 3 in the initial position to prevent the ring knife from rotating and damaging the bellows under overload. The torsion spring adopts a tangential arm structure, the load is in the same direction as the coil spring, the long arm is stuck in the groove of the shell, and the short arm constrains the ring knife.

[0047] like Figure 7 As shown, when the bellows is installed inside the hose cutting device, the ring knife will not contact the bellows 10; the actuating rod 401 is driven by the gas of the electric detonator, as shown in FIG. Figure 6 As shown in the figure, the end spherical surface pushes the outer arc surface of the ring knife, and the ring knife rotates around the axis; when the actuator moves about 7mm, the ring knife rotates 45° around the axis and stops rotating when it contacts the inclined surface on the buckle cover. At this time, the ring knife cuts about 60% of the circumferential range of the corrugated pipe. When the bellows is stretched and the ring knife does not rotate, the distance between the bellows and the ring knife is greater, and the cutting range is wider after rotation.

[0048] In the normal installation state, the ring knife 3 is fixed in the initial position by the torsion spring 9 to prevent the ring knife 3 from rotating and damaging the bellows 10 under the action of overload.

[0049] In emergency life-saving situations, when receiving an electric signal, Figure 8 and Fig. 9 As shown, the electric detonator 4 generates high-temperature and high-pressure gas when it works, which reaches the rear part of the actuating rod 401 through the channel 402 inside the shell, pushes the actuating rod to actuate, and the spherical surface of the actuating rod end pushes the outer arc surface of the ring knife, and the ring knife rotates around the axis to cut the bellows, and then the gas is discharged through the discharge channel, the internal pressure of the shell is reduced, and the ring knife returns to its original position under the action of the torsion spring, making way for the oxygen supply channel.

[0050] In a specific embodiment, when the actuator rod 401 moves into place, the sealing effect of the sealing ring fails, and the gunpowder gas passes through the gap between the actuator rod and the shell, and then slowly discharges through the vent hole 403 on the shell. On the one hand, it prevents high-pressure gunpowder gas from filling the shell for a long time and forming a safety hazard. On the other hand, it prevents gunpowder gas from concentrating in the shell and entering the inner cavity of the bellows in large quantities.

[0051] When the ring knife is in the initial position, the working torque of the torsion spring is 18.6N·mm, and the pressure exerted on the ring knife by the short arm end is 1.8N. Assuming that the mass of the ring knife is all concentrated at the farthest end from the rotating shaft, it can withstand an overload of 27g. When the ring knife is at the maximum angular position, the working torque of the torsion spring is 105N·mm, and the pressure exerted on the ring knife by the short arm end is 10N, which is negligible relative to the thrust exerted by the actuator rod on the ring knife. When the torsion spring is at the maximum angular position, the sealing ring on the actuator rod fails, and the gunpowder gas generated by the electric detonator is slowly discharged through the gap between the actuator rod and the shell and the air vent hole 403 on the shell. The force of the high-pressure gas on the actuator rod gradually decreases. When the force decreases to a certain extent, the torsion spring pushes the ring knife back to give up the occupied gas flow channel.

[0052] In an optional embodiment, an oxygen concentration sensor is installed in the oxygen mask. If the human-chair separation of the ejection life-saving system fails to be successfully triggered, the electric detonator is activated according to the oxygen concentration in the oxygen mask and the descent height to drive the ring knife to cut.

[0053] The bellows cutting device proposed in the embodiment of the present invention has a working trigger signal derived from a person-chair separation signal, and its working timing is when the person-chair is separated, before the pilot falls into the water, which can effectively ensure that the oxygen mask bellows has been cut and the oxygen supply channel has been opened when the pilot floats to the surface after falling into the water, and better solves the oxygen supply problem after the pilot falls into the water when unconscious. The present invention is not only suitable for the safe rescue of people who fall into the water in seawater, but also for the safe rescue of people who fall into the water in fresh water, and has significant military benefits.

[0054] Example 2

[0055] like Fig.10 As shown, an embodiment of the present invention provides an anti-suffocation cutting method based on a person-chair separation signal, comprising the following steps:

[0056] (1) After the ejection lifesaving device is activated, the pilot ejects from the cabin in an emergency. The lifesaving system automatically separates the pilot from the seat when the pilot descends to a certain altitude. When the pilot and the seat are separated, the ejection seat sends a separation signal.

[0057] (2) The human-chair separation signal is transmitted to the bellows cutting device through the electronic oxygen supply anti-g regulator and helmet adapter via the bellows;

[0058] (3) The bellows cutting device works by electric explosion to cut the oxygen mask bellows. Under the action of tensile stress, the notch opens to form an oxygen passage.

[0059] The human-chair separation signal is an electrical signal, which is the working signal source of the bellows cutting device. The signal starts from the ejection seat, passes through the electronic oxygen supply anti-load regulator, is transferred in the helmet signal line, and then is transmitted to the bellows cutting device through the bellows.

[0060] After receiving the signal of separation of the person and the chair, the bellows cutting device connects the circuit through the electronic part, the circuit triggers the electric detonator, and the output gas drives the push rod to push the ring knife. The cutting knife acts on the bellows to produce a notch. After the notch is produced, the notch is broken and opened under the action of tensile stress to form an oxygen passage. At the same time, in order to prevent the high-temperature and high-pressure gunpowder gas generated when the bellows cutting device is working from entering the respiratory tract to cause harm to the pilot, a gunpowder gas sealing scheme is adopted to increase the strength safety factor of the pressure-bearing part to ensure that the gunpowder gas is not released into the atmosphere, and at the same time, the pressure-bearing shell will not rupture to cause harm to the pilot.

[0061] The bellows cutting device and method proposed in the embodiment of the present invention, the cutting device working trigger signal is derived from the person-chair separation signal, and its working time is when the person-chair is separated, before the pilot falls into the water, which can effectively ensure that the oxygen mask bellows has been cut and the oxygen supply channel has been opened when the pilot floats to the surface after falling into the water, and better solves the oxygen supply problem after the pilot falls into the water. The present invention is not only suitable for the safe rescue of people who fall into the water in seawater, but also for the safe rescue of people who fall into the water in fresh water, and has significant military benefits.

[0062] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. An anti-suffocation cutting device based on a person-chair separation signal, characterized in that: include: A metal electrode is mounted on the seat, and the metal electrode is connected to the circuit board of the anti-suffocation cutting device through a contact electrode of an external circuit; A ring cutter, one end of which is fixed at an initial position by a rotating shaft; An electric detonator, whose actuating rod provides thrust for the ring cutter; The electric detonator, the ring knife and the circuit board are installed in a shell; and the shell is fixed on the bellows of the oxygen mask.

2. The anti-suffocation cutting device based on the person-chair separation signal according to claim 1 is characterized in that: The shell includes a first arc-shaped shell and a second arc-shaped shell; the first arc-shaped shell and the second arc-shaped shell are fixed to the corrugated tube by two pins; wherein a cavity is also provided on the outer side of the second arc-shaped shell for accommodating the ring knife, the electric detonator and the circuit board.

3. The anti-suffocation cutting device based on the person-chair separation signal according to claim 2 is characterized in that: The electric detonator comprises a sealing ring and a small air leakage hole; wherein, when the actuating rod of the electric detonator moves to a certain position, the sealing ring fails, and the gunpowder gas is slowly discharged through the small air leakage hole.

4. The anti-suffocation cutting device based on the person-chair separation signal according to claim 3 is characterized in that: Also includes: A limiting device; wherein, when the ring knife is pushed by the actuating rod of the electric detonator, the ring knife rotates around the axis to a preset angle, contacts the limiting device, and stops rotating.

5. The anti-suffocation cutting device based on the person-chair separation signal according to claim 4 is characterized in that: Also includes: The torsion spring is a tangential arm structure; the load of the torsion spring is in the same direction as the coil spring; the long arm of the torsion spring is clamped in the groove of the shell through the rotating shaft; the short arm of the torsion spring is used to constrain the ring knife so that the ring knife is located in the initial position.

6. The anti-suffocation cutting device based on the person-chair separation signal according to claim 5, characterized in that: Also includes: An oxygen concentration sensor patch is arranged in the oxygen mask and connected to the circuit board through an external circuit.

7. The anti-suffocation cutting device based on the person-chair separation signal according to claim 1, characterized in that: The circuit board is electrically connected or wirelessly connected to the ejection lifesaving system.

8. The anti-suffocation cutting device based on the person-chair separation signal according to claim 1, characterized in that: The circuit board also includes a self-test circuit.

9. An anti-suffocation cutting method based on a person-chair separation signal, using the anti-suffocation cutting device based on a person-chair separation signal as claimed in any one of claims 1 to 8, characterized in that: Start the cutting device according to the start signal of the ejection lifesaving system; Obtain the connection status of the metal electrode and the contact electrode to determine whether the person and the chair are separated; After the person and chair are separated, the electric detonator is activated to push the ring knife to cut the bellows of the oxygen mask.

10. The anti-suffocation cutting method based on the person-chair separation signal according to claim 9 is characterized in that: Also includes: If the separation of the person and the chair fails, the electric detonator is activated to cut the bellows according to the descent height and / or the oxygen concentration in the oxygen mask.

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